JPH07230666A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To perform reproduction by quickly changing over a video signal to a different video signal without using a complicated addition circuit and a discriminating means even when plural video signals having no compatibility are recorded in a tape and to record the picture of a program in the overlapping period when the programs of an HD signal and an NTSC signal are overlapped at the time of video recording reservation by providing an identifying signal every video signal to different format. CONSTITUTION:A CTL signal generating part 18, a CTL signal detecting part 19, a CTL signal changeover part 20 and a CTL head 7, etc., are provided as the means for generating, writing and reading an identifying signal of a video signal having a different format. Consequently, the identifying signal is provided every video signal of a different format, the video signal is recorded and the identifying signal complied with the video signal is written at the same time. At the time of reproduction, the identifying signal is simultaneously read out for discrimination, a reproducing means suitable for the video signal is selected and the reproduction is performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention can record and reproduce a plurality of programs separately on one magnetic recording medium.
The present invention relates to a magnetic recording / reproducing device such as a TR.

[0002]

2. Description of the Related Art As current television broadcasting, BS broadcasting and CS broadcasting using satellites are becoming widespread in addition to terrestrial broadcasting of VHF and UHF. With such an increase in the number of broadcast programs,
Although there may be a demand to record two programs at the same time, almost all home VTRs that are currently in widespread use in the world can record only one video signal, so two video signals can be recorded. Two VTRs to record at the same time
is necessary. However, recently, a VTR for simultaneously recording two video signals on one tape by the helical scanning method has been proposed in Japanese Patent Laid-Open No. 5-22742.

Also, as a representative of current broadcasting, the scanning line 52
There are five NTSC broadcasts with an aspect ratio of 4: 3, but on the other hand, high-definition broadcasts with 1125 scanning lines and an aspect ratio of 16: 9, which are different from current broadcasts, are attracting attention as next-generation image media. Also for home VTRs, VTRs for recording current broadcasts have become widespread all over the world, but recently, home VTRs for recording high-definition broadcasts have been proposed. For example, Technical Report of Television Society Vol.1
5, No.50, PP.1 ~ 6, VIR '91 -33, CE'91-44 (Sep, 1991)
An example is the proposal in "High-definition VTR specifications for consumer use" by Yamashita et al.

On the other hand, a VTR for recording / reproducing a current broadcast (NTSC) signal and a high-definition broadcast (HD) signal, which are video signals of completely different systems, is also proposed by combining the above VTRs into one. Has been done. As shown in FIG. 31, two pairs of rotary heads 1a of reverse azimuth,
2a and 1b, 2b are attached to adjacent rotary heads 1a, 1b
And 2a, 2b are mounted on the drum 3 with appropriate steps and mounting angles so that they have reverse azimuth.
Then, the drum 3 is rotated at about 1800 rpm in synchronization with the vertical synchronizing signal of the video signal, and the tape 4 is run at a pitch three times the head width during the half rotation of the drum. As shown, one guard band having the same track width as two tracks is drawn per field. In the case of the HD signal, the luminance signal Y of one field and the two color difference signals PB and PR are distributed and recorded in two tracks. That is, one program is recorded on two tracks. In the case of two NTSC programs, one field of one program is recorded separately on the TA track and one field of the other program is recorded separately on the TB track. By doing so, two NTSC programs and HD signals can be recorded on one tape by two sets of rotary heads.

If such a VTR is used, the VTR is 2
Since signals of NTSC broadcast can be recorded simultaneously without a stand, as shown in FIG. 33 (a), for example, 12: 0
Reserved program A from 0 to 13:30 and 12:00 to 13: 0
Even if the reserved program B of 0 has the overlapping period C, it does not mean that a part of the reserved program cannot be recorded. The user may record the reserved program A on the TA track and the reserved program B on the TB track when making the reservation setting.

[0006]

However, the simultaneous recording of two programs as described above is limited to the case where one program is recorded on one track in one field like an NTSC signal, and one field like an HD signal is recorded. This cannot be done when recording one program on two tracks. Furthermore, as shown in FIG. 33 (b), the HD broadcast program and NTS
If the programs of the C broadcast overlap, there is a problem that one of the programs in the overlapping period (the program of the NTSC broadcast in the figure) cannot be recorded. Also, one for every two tracks like HD signals
In the case of the standard for recording programs, there is no long-time mode for recording at a tape speed slower than the standard mode, so if the remaining tape amount is shorter than the time of the HD program you want to reserve, you cannot record the program to the end. The problem also arises.

Furthermore, not only the reservation as described above, but when such a VTR is used, HD signals and N
A mixture of TSC signals can occur. Conventionally, as a method of recording such incompatible video signals mixedly on one tape and discriminating and reproducing them, for example, a signal for discriminating these is added to the video signal. However, there was a problem that the circuit became complicated.

The present invention has been made to solve the above problems, and even if a plurality of incompatible video signals are recorded on a single tape, a complicated additional circuit or discriminating means is required. It is an object of the present invention to provide a magnetic recording / reproducing apparatus capable of promptly switching and reproducing different video signals without using.

It is another object of the present invention to provide a magnetic recording / reproducing apparatus capable of simultaneously recording two programs in an overlapping period of two programs generated at the time of reservation, particularly in an overlapping period of two program reservations of HD broadcasting and NTSC broadcasting. To do.

It is another object of the present invention to provide a magnetic recording / reproducing apparatus capable of recording a program to the end even if the tape remaining amount is shorter than the time of the HD program to be reserved and recorded.

[0011]

A magnetic recording / reproducing apparatus according to the present invention includes an identification signal generating means for generating identification signals corresponding to a plurality of information signals, and at the same time the information signals are recorded, the identification signals are used as the information. Identification signal writing means for writing on a different track from the signal, a plurality of information signal reproducing means for reproducing a plurality of information signals, identification signal reading means for detecting the identification signals, and a type of the read identification signal And an identification signal discriminating means.

An identification signal for identifying the information signal is recorded on a control track for recording a control signal, and a phase difference having a polarity opposite to that of the control signal is generated between the control signal written at a constant timing together with the information signal. A phase signal writing means for writing a signal having the same, a phase identification signal generating means for generating a plurality of the phase differences, and generating a combination of the phase differences for each information signal, and a discrimination means for discriminating the combination of the phase differences. And a means for reproducing the information signal by selecting the information signal reproducing means based on the discriminating means.

Further, a reservation time storage means for storing a start time and an end time relating to the reservation of a plurality of programs, and a reserved program for detecting an overlapping period of programs of different systems from the times stored in the reservation time storage means. Overlapping period detection means, and when the overlapping period exists, the program of A system is
It is provided with a means for converting into a system signal and a means for simultaneously recording and recording the program after the B format conversion and another overlapping B system program during the overlapping period.

Further, a reservation time storage means for storing a start time and an end time relating to the reservation of a plurality of programs, and a program extension detecting means for detecting whether or not the program in the advance reservation recording is extended after the reservation end time. And a reserved program duplication period detection means for detecting whether or not the extended time of the preceding program and the reserved time of another trailing reserved program overlap, and a plurality of overlapping programs when the overlapping period exists. At the same time, it is equipped with a means for recording reservations.

Further, a reservation time detecting means for detecting the time of the reserved program from the start time and the end time relating to the reservation of the A system program, and the remaining time of the medium at the traveling speed of the medium for recording the A system program. A medium remaining amount detecting means for detecting the time, a comparing means for comparing the reserved time of the program of the A system and the remaining medium time of the program, and running of the medium of the A system if the medium remaining time is shorter than the reserved time of the program of the A system Switching time calculating means for calculating a switching time from the A method to the B method such that the sum of the recording time at the speed and the recording time at the traveling speed of the medium of the B method becomes equal to the remaining time of the medium; When the above-mentioned switching time is reached during reservation recording of the program
It is provided with a means for converting a system program into a B system signal and a means for recording the converted signal as a B system program after the switching time.

Also, in a magnetic recording / reproducing apparatus capable of simultaneously recording and recording N (N is an integer of 1 or more) programs, a reservation time for storing a start time and an end time relating to the reservation of N programs, respectively. Storage means, reserved program duplication detection means for detecting the duplication period and the number of duplication programs from the storage time of the reserved storage means, and duplication program display means for displaying the existence of the duplication program when the duplication program is detected. If the number of the overlapping programs is N or less when simultaneously recording the overlapping programs, all the programs of the N or less programs are displayed together with which program is recorded in which area, or If there are a large number of programs, the overlapping program display means for displaying that all programs are not simultaneously reserved and recorded together with the unrecorded programs, and the reservation recording of the overlapping programs is performed according to the display. Those having a reservation recording means.

[0017]

The magnetic recording / reproducing apparatus of the present invention writes an identification signal corresponding to the information signal when recording the information signal to a track different from the track on which the information signal is recorded and reproduces the identification signal. Is selected and a reproducing means suitable for the information signal is selected to perform a reproducing operation.

Further, a plurality of phase difference signals of the control signal are provided, and at the time of recording, the combination of the phase differences is made different for each information signal and written in the control track.
At the time of reproduction, the combination is discriminated and the information signal reproducing means is selected based on the discrimination result.

Further, at the time of reservation recording, a program of A system and B
If an overlapping period occurs in the program of the system, A during the overlapping period
A program of the B format is converted into a signal of the B format, and the program after the B format conversion and the overlapping program are simultaneously recorded during the overlapping period.

Further, when there is no overlap period between the preceding program and the succeeding program at the time of reserved recording, if the overlap period occurs between the succeeding program due to the extension of the preceding program, The programs during the overlapping period caused by the extension are recorded at the same time.

If the medium recording remaining time is shorter than the reservation time of the program of the A system, the sum of the recording time at the traveling speed of the medium of the A system and the recording time at the traveling speed of the medium of the B system is the above. The switching time from the A system to the B system is calculated so as to be equal to the remaining time of the medium, and when the switching time comes during the reservation recording of the A system program, the A system program is changed to the B system.
After conversion time, the converted signal is recorded as a B-system program.

If the number of overlapping programs is equal to or less than the number of programs that can be simultaneously recorded, the program to be recorded in which area is displayed to record the overlapping programs, and the number of overlapping reserved programs can be simultaneously recorded. If the number is larger than the number, a duplicate program that cannot be recorded among the duplicate programs is displayed and the program is not recorded.

[0023]

【Example】

Example 1. A specific embodiment of the magnetic recording / reproducing apparatus of the present invention will be described with reference to FIG. 1 is a block circuit diagram of a video recording system of a magnetic recording / reproducing apparatus according to a first embodiment of the present invention. 1a, 2a, 1b, 2b are rotated (video)
Head 5, supply reel, 6 take-up reel, 7 CTL
Head, 8 is capstan (capstan motor is not shown), 9 is the first NTSC for receiving NTSC broadcast
Tuner 10 is the second NTS receiving NTSC broadcast
C tuner, 11 is an HD tuner for receiving HD broadcast,
12 is a first NTSC video signal pre-processing unit, 13 is a second NTSC video signal pre-processing unit, 14 is an HD video signal pre-processing unit, 15a and 15b are switching units, 16 and 17 are rotary heads 1a and 2a, A recording signal post-processing unit for recording a video signal on the tape by 1b and 2b, and is composed of an FM modulator or the like. Reference numeral 18 denotes a CTL signal generator that generates a CTL signal to be recorded on the control track of the tape.
Reference numeral 9 is a CTL signal detection unit, 20 is a CTL signal switching unit,
Reference numeral 21 is a capstan motor drive unit, 22 is an output signal switching unit, 23 is an operation unit, and 24 is a system microcomputer (hereinafter referred to as "system microcomputer") (including a mechanical system control microcomputer). The rotary heads 1a to 2b are arranged on the drum 3 as shown in FIG.

FIG. 2 is a diagram for explaining the CTL signal according to the magnetic recording / reproducing apparatus of the first embodiment. The CTL signal is generated by the CTL signal generation unit 18 in response to the command from the system microcomputer 24, and as shown in FIG. 32, the CTL head 7 controls the control track at the lower end of the tape 4 in synchronization with the video signal to be recorded. One frame is recorded. Here, the cycle of the CTL signal is not changed, only the duty ratio (the time from the rising edge to the falling edge of the CTL signal) is changed, and the duty ratio is 60 ± 5%.
Is a CTL signal of "0" and 25 ± 5% is a CTL signal of "1". Further, the CTL signal of "0" is changed by + 2.5% and -2.5% with respect to the duty ratio of 60%, and the duty ratio of 62.5% is changed to the CTL signal of "L" and the duty ratio of 57.5%. The CTL signal of "S" is used. Both are within the allowable range of the CTL signal of "0". In addition, "1"
In the case of the CTL signal of, the duty ratio is 27.5%,
22.5%, and similarly "L" CTL signal, "S"
CTL signal of.

The system microcomputer 24 continuously writes "L" CTL signals as shown in FIG. 3 when recording HD signals, and "S" CT when recording NTSC signals.
The CTL signal generator 18 so that the L signal is continuously written.
To control. At this time, the CTL signals of "L" and "S" are recorded regardless of the combination of the CTL signals of "0" and "1". By doing so, the CTL signal including the identification signal indicating the HD signal is written in the control track in the area in which the HD signal is recorded, and the NTSC
The CTL signal including the identification signal indicating the NTSC signal is written in the control track in the area where the signal is recorded.

Next, the operation will be described with reference to the flowchart of FIG. 4 and the operation diagram of FIG. It is assumed that the tape to be recorded has an NTSC signal recorded therein in advance as shown in FIG. 5A, and that a CTL signal of "S" of "0" is written in the control track. C
Although the TL head 7 is stopped at the tape stop position in FIG. 5A, when the operation unit 23 is operated to record an HD program, the system microcomputer 24 first rewinds the tape 4. Then, the capstan motor driving unit 21 is instructed to rotate the capstan 8 in the reverse direction (in FIG. 5, the CTL head 7 is shown to move). At the same time, in order to measure the amount of tape to be rewound, the CTL signal switching unit 20 is switched to the CTL signal detecting unit 19 side, and the previously recorded CTL signal is counted by the system microcomputer 24 (step 100). Next step 101
The duty of the CTL signal from the 19th to 39th CTL signals is read and the previously recorded video signal is discriminated. In this case, it is determined that the NTSC signal has been recorded in advance.

When the tape is rewound by the predetermined number of CTL signals (for example, 40 shots) in step 102, step 103
Then, the capstan is normally rotated to feed the tape in the recording direction, and the CTL signal is counted. At the same time, the HD signal to be recorded and the CTL signal previously recorded are phase-synchronized (step 104).

In step 105, when the CTL count number after starting the normal rotation of the tape reaches a count number (for example, 20 shots) corresponding to a necessary and sufficient time until phase synchronization is performed and the tape speed is stabilized, Step 10
Go to 6. If the video signal determined in step 101 and the video signal to be recorded are the same, the process proceeds to step 109, and if not, the process proceeds to step 107.

In step 107, while controlling the phase of the tape, the CTL signal switching section 20 is switched to the CTL signal generating section 18 side at a predetermined timing, and H
The "L" CTL signal representing the D signal is written. That is, at the timing before and after the rising edge of the CTL signal, the CTL signal switching unit 20 is switched to the CTL signal detecting unit 19 side, the input time of the CTL signal is read, and the phase of the tape is controlled.

At other timings, the CTL
The signal switching unit 20 is switched to the CTL signal generating unit 18 side to write the CTL signal of "L" having a duty of 62.5%. In step 108, when the number of "L" CTL signals to be written reaches a predetermined number (for example, 10), the switching unit 1
5a and 15b are switched to the HD signal preprocessing section 14 side to record the HD signal after the 11th CTL signal is issued. The "L" CTL signal is written while the HD signal is recorded (step 107).

The HD video signal received from the HD tuner 11 is input to the HD signal preprocessing unit 14 and is externally monitored through the output signal switching unit 22 (for details of the operation of the output signal switching unit 22. Will be described later). The HD signal pre-processing unit 14 sorts the HD video signals of one field, that is, the Y, PB, and PR signals, so as to record them on two tracks, and performs appropriate processing on each. Then, one of the processed signals is input to the first recording signal post-processing unit 16 through the switching unit 15a and subjected to post-processing such as FM modulation, and then the heads 1a, 2
It is recorded on the tape at a. Another signal is also recorded on the tape by the rotary heads 1b and 2b through the switching unit 15b and the second recording signal post-processing unit 17.

According to the explanation of the flow chart of FIG. 4, the tape after recording the HD signal is as shown in FIG. 5 (b). When the HD signal is spliced and recorded on the tape on which the NTSC signal is recorded, the CTL signal of “L” indicating the HD signal is written in the control track from the area where the HD signal is recorded by 10 CTL signals before. Will be done. Also, although the "L" CTL signal of "1" is written from the area where the HD signal is recorded,
This "1" means a cue signal. If the cue signal is not written, the "L" CTL signal of "0" is written.

When the HD signal is recorded on the tape on which the HD signal is recorded, the process moves from step 106 to step 109 in the flow chart of FIG. 4, so that writing of 10 "L" CTL signals is required. Instead, the HD video signal is recorded immediately after the phase matching reproduction is performed.

When recording a HD video signal on a tape in which no CTL signal is recorded (for example, a tape immediately after purchase), an operation such as phase matching is not performed and the tape is rewound. Immediately after that, recording of the HD signal and writing of the CTL signal of "L" representing it may be performed. Although this operation is not shown in the flow chart of FIG. 4, a sequence for starting a timer or the like for measuring the time at the same time as winding the tape and moving to step 109 if the CTL signal is not detected within a certain time It can be easily achieved if done.

When recording an NTSC program (NTSC-A signal) received from the first NTSC tuner 9,
After performing the operations from step 100 to step 106 described above, while performing phase matching, the CTL of "S"
Write 10 signals, NTS as in step 109
Record the C signal. The system microcomputer 24 switches the switching unit 15a to the first NTSC signal pre-processing unit 12 side, and the NTSC-A signal is the first NTSC signal pre-processing unit 1
2 is subjected to appropriate processing, and the first recording signal post-processing unit 1
FM modulation or the like is performed at 6, and recording is performed by the rotary heads 1a and 2a. At this time, the switching unit 15b is switched to the middle point so that the rotary heads 1b and 2b do not record other signals.

When recording an NTSC program (NTSC-B signal) received from the second NTSC tuner 10, after performing the operations from step 100 to step 106 described above, "S" is performed while performing phase matching. C
Write 10 TL signals, N as in step 109
Record the TSC signal. The system microcomputer 24 switches the switching unit 15b to the second NTSC signal preprocessing unit 13 side. The NTSC-B signal is subjected to appropriate processing by the second NTSC signal pre-processing unit 13, FM modulation is performed by the second recording signal post-processing unit 17, and the rotary heads 1b, 2
Recorded at b. At this time, similarly to the above, the switching unit 15a is switched to the middle point so that the rotary heads 1a and 2a do not record other signals. The middle point merely represents the physical meaning of not recording.

2 of NTSC-A signal and NTSC-B signal
In the case of simultaneously recording two data, after performing the operations from step 100 to step 106 described above, 10 CTL signals of "S" are written while phase matching is performed, and the NTSC signal is recorded as in step 109. The system microcomputer 24 switches the switching units 15a and 15b to the side of the first NTSC signal preprocessing unit 12 and the second NTSC signal preprocessing unit 13, respectively, and by the rotary heads 1a and 1b or 2a and 2b as described above. Record at the same time.

Next, the reproducing system will be described. FIG. 6 is a block circuit diagram of a reproducing system of the magnetic recording / reproducing apparatus of the present invention. The same reference numerals as those in FIG. A signal pre-processing unit, which is configured by FM demodulation or the like. 32a, 32b
Is a switching unit, 33 is a first NTSC signal post-processing unit, 3
Reference numeral 4 is a second NTSC signal post-processing unit, and 35 is an HD signal post-processing unit, which performs operations opposite to those of the pre-processing unit at the time of recording,
The signal obtained from the tape is used as the original video signal. 22
Is an output signal switching section for outputting the reproduced video signal to the outside, and 19 is a CTL signal detecting section for detecting the CTL signal reproduced by the CTL head 7. Various controls are performed by the system microcomputer 24 as in the recording mode.

Since the flow of the video signal has an inverse relationship with the recording mode, its explanation is omitted, and the reading operation of the CTL signal will be explained with reference to the flowchart of FIG. When a playback command is sent from the external operation panel 23,
The system microcomputer 24 performs various controls to perform a reproducing operation, and in particular, the capstan drive unit 21 receives a command from the system microcomputer 24 and synchronizes with the head switching signal of the drum 3 to send the tape 4 at a constant speed. The stun motor is controlled (step 120).

CTL detected by the CTL signal detector 19
The signal is used not only for the phase control of the capstan motor described above, but also for switching the reproduction video signal post-processing unit described later. After the tape speed stabilizes, the system microcomputer 24 measures the time from the rising edge to the falling edge of the CTL signal with the built-in counter,
The CTL signals of "L" and "S" are discriminated (step 1
21). After detecting the duty ratio of the read CTL signal, if the CTL signal is “L”, the process proceeds to step 123, and if “S”, the process proceeds to step 125 (step 1
22).

At step 123, the CTL signal of "L" becomes 1
If it is detected 0 times in succession, the switching units 32a and 32b are moved to the HD signal post-processing unit 35 side in step 124.
The output signal switching unit 22 is switched to the HD signal post-processing unit 35 side to obtain a reproduced image of the HD signal. If the CTL signal of "S" is detected 10 times in succession in step 125, the switching units 32a and 32b are set to N in step 126.
The output signal switching unit 22 is switched to the TSC signal post-processing units 33 and 34 side and the output signal switching unit 22 is switched to the NTSC signal post-processing units 33 and 34 side to obtain a reproduced image of the NTSC signal. That is, the switching units 22 and 32 are provided with hysteresis for 10 CTL signals so that the switching units 22 and 32 do not easily switch due to erroneous detection or the like.

When the reproduction is performed from the state where the tape is stopped, the type of the video signal is determined in about 0.33 sec after the tape is stabilized, so that the reproduced image can be obtained sufficiently fast.

Further, when the area where the NTSC signal and the HD signal are jointly shot is reproduced, the CTL signal representing the video signal from the area where the video signal is recorded when the video signal is recorded is 10 CTL signals before. Is written in the control track, a reproduced image can be quickly obtained from the head after detecting 10 CTL signals.

In the area where two signals, NTSC-A signal and NTSC-B signal, are recorded at the same time, the user selects either one with the operation unit 23, and the system microcomputer 24 switches the output signal accordingly. The section 22 may be switched.

Also, the NTSC-A signal or NTSC
When either one of the -B signals is recorded, the system microcomputer 24 may switch the output signal switching unit 22 to the side where the reproduction envelope is detected.

Regarding the method of detecting the CTL signal, for example, when the CTL signal is "0", the duty ratio is 60%.
The threshold value is the count value corresponding to the threshold value, and if it is more than that, it is set as the “L” CTL signal, and if it is less than that, it is set as the “S” CTL signal (when the CTL signal is “1”, the duty ratio is The threshold value is the count value equivalent to%).

If it is difficult to determine the duty ratio by the above method due to a large tape fluctuation, the cycle of the CTL signal may be simultaneously measured by the counter to calculate the duty ratio.

Next, the output signal switching section 22 for viewing the video signal from the tuner and the reproduced video signal on a monitor will be described. In order for a user to see an HD signal and an NTSC signal which are completely incompatible, a monitor corresponding to each must be prepared. On the other hand, recently, there are monitors that can watch both HD programs and NTSC programs, but during playback, the HD signal and NTS that are monitor inputs are used.
Every time the C signal is switched, the user has to operate the monitor according to it, which is troublesome. In order to solve these problems, the output signal switching unit 22 has the following configuration.

FIG. 8 is a block circuit diagram of the output signal switching unit 22, where a is the first NT from the first tuner 9.
SC signal, b is HD signal from HD tuner 11, c is second NTSC signal from second NTSC tuner 10, d is first NTSC signal from first NTSC signal post-processor 33, and e is The HD signal from the HD signal post-processing unit 35 and f represent the second NTSC signal from the second NTSC signal post-processing unit 34, which correspond to FIGS. 1 and 6, respectively. Reference numeral 40 is a mode switching unit for switching a signal from the tuner and a signal from the reproduction signal processing unit, and 41 is a first N
NTS for switching between TSC signal and second NTSC signal
A C signal switching unit, 42 is an NTSC / HD conversion unit for converting an NTSC signal into an HD signal, 43 is an HD signal switching unit, 44 is an NTSC signal output terminal, and 45 is an HD signal output terminal.

The output of the output signal switching unit 22 is NTSC.
There are two systems, a signal output terminal 44 and an HD signal output terminal 45, which are input to the NTSC signal input terminal and the HD signal input terminal of the monitor, respectively. g is a control signal of the mode switching unit 40, h is a control signal of the NTSC signal switching unit 41,
i is a control signal of the HD signal switching unit 43, and all the control signals from g to i are controlled by the system microcomputer 24.

The mode switching section 40 switches to the tuner side during recording, and switches to the playback signal processing section side during playback. This switching is done by system microcomputer 2
It is performed by 4. HD signal and N for monitor switching
The discriminating method of the TSC signal is performed by the discriminating signal read from the tape in the case of reproduction, whereas the discriminating method of the HD signal and the NTSC signal is performed by the user's tuner selection in the case of recording. Hereinafter, the operation in the case of reproduction will be described, and the operation in the case of recording will be omitted.

For example, assume that the user is playing a tape that changes from an HD signal to an NTSC signal. Since the HD signal is reproduced at first, the HD signal switching unit 43 is on the mode switching unit 40 side, and the user can view the HD program on the monitor. When the NTSC signal is changed to the NTSC signal during reproduction, the NTSC signal switching unit 41 receives the command from the system microcomputer 24 and switches to the first NTSC signal side, and the NTSC signal is output to the output terminal 44 and at the same time, NTSC / HD signal conversion. It is input to the section 42. N
The TSC / HD conversion unit 42 converts an NTSC standard signal to H
D signal is converted into, for example, 525 scanning lines of NTSC signal using a built-in memory etc.
The signal is converted into a signal, and the converted HD signal is output to the output terminal 45 through the HD signal switching unit 43 that operates in response to a command from the system microcomputer 24. As a result, if the user always sees the signal from the HD signal output on the monitor when playing the tape, the HD is output during playback.
Even if the signal and the NTSC signal change alternately, both programs can be viewed on the monitor side without switching for each reproduction signal.

Further, as shown in FIG. 9, the switching performed by the output signal switching section 22 may be performed within the monitor. In the figure, j is a control signal to the monitor, 46 is a control signal output terminal for outputting the control signal j, and 5
0 is monitor, 51 is NTSC signal input terminal, 52 is HD
Signal input terminals 53 are control signal input terminals, which are connected to the output signal switching unit 22 by a cable or the like. 54 is an NTSC signal processing unit in the monitor,
An RGB signal is created from the Y signal and the C signal of the SC signal. Reference numeral 55 is an NTSC deflecting unit, which creates a drive signal for driving the cathode ray tube from the vertical and horizontal synchronizing signals of the NTSC signal. 56 is an HD signal processing unit in the monitor,
An RGB signal is created from the Y signal, the PB signal, and the PR signal of the D signal. Reference numeral 57 denotes an HD deflector, which creates a drive signal for driving the cathode ray tube from the vertical and horizontal synchronizing signals of the HD signal. Reference numeral 58 is a monitor switching unit for switching between RGB signals and deflection signals, and 59 is a cathode ray tube, which can display both NTSC signals and HD signals. 60
Is a monitor operating unit, and 61 is a monitor system microcomputer (hereinafter referred to as "monitor system microcomputer").

Next, the operation will be described. Now, for example, it is assumed that the user is reproducing a tape in which the NTSC signal is changed to the HD signal. HD signal switching unit 43 is NT
If it is on the side of the SC / HD converter 40, the NTSC signal reproduced from the tape is input from the NTSC input terminal 51 and the HD signal input terminal 52 of the monitor 50. When you start playing the tape, the signal is NTSC
If it is a signal, the monitor system microcomputer 61 receives the command of the control signal j and switches the monitor switching unit 58 to the NTSC side.

In the state where the monitor switching unit 58 is switched to the NTSC side, when the tape reproduction signal is changed to the HD signal while the user is watching the NTSC signal,
The HD signal switching unit 43 is switched to the mode switching unit 40 side to output the reproduced HD signal from the HD output terminal 45, and at the same time, the control signal j indicating that the NTSC signal is switched to the HD signal is output to the control signal output terminal 46. Upon receiving the command, the monitor system microcomputer 61 forcibly switches the monitor switching unit 58 to the HD side. By doing so, even if the NTSC signal is changed to the HD signal during reproduction, the user can view the HD signal without performing a troublesome operation.

The reproduced NTSC signal is NTSC.
It is also output to the HD signal output terminal 45 through the / HD conversion unit 42. The user can also view the converted signal by switching the monitor switching unit 58 to the HD side. If the reproduction signal of the tape is changed to the HD signal in that state, the HD signal switching unit 43 is switched to the mode switching unit 40 side and the reproduction H is reproduced from the HD output terminal 45.
At the same time that the D signal is output, the control signal j indicating that the NTSC signal is switched to the HD signal is output to the control signal output terminal 4
Output to 6. In response to the command, the monitor system microcomputer 61 tries to forcibly switch the monitor switching unit 58 to the HD side, but this operation has no meaning because it has been switched to the HD side in advance. Even in this case, the user can view the HD signal without performing a troublesome operation.

On the other hand, the same is true when the user is reproducing a tape in which the HD signal is changed to the NTSC signal. While the HD signal is being reproduced, the HD signal switching unit 43 is switched to the mode switching unit 40 side, and the HD signal reproduced from the tape is input from the HD input terminal 52 of the monitor 50. Therefore, the monitor switching unit 58 is set to the HD side. Switch to. When the tape reproduction signal is changed to the NTSC signal in this state, the HD signal switching unit 43 is set to NTSC / HD.
The converter 42 is switched to and the converted signal is output from the HD output terminal 45. At this time, the system microcomputer 24 dares not to send the control signal j as a control signal such as the change to the NTSC signal. This is because the reproduced NTSC signal can be viewed with the monitor switching unit 58 held in the previous state without sending the control signal. If the user fixes the HD signal switching unit 43 on the mode switching unit 40 side (this is N
Equivalent to the fact that the TSC / HD conversion unit 42 is not configured in the output signal switching unit 22), the reproduced NTSC signal is output only to the NTSC output terminal 44, so control according to the reproduced signal is performed. The signal j is sent to the monitor 50, and the monitor switching unit 58 is switched according to the control signal j. Whether to fix the HD signal switching unit may be input from the operation unit 23.

In the first embodiment, the NTSC / HD signal converter 42 and H are provided inside the output switching unit 22 of the VTR.
Although the case where the D signal switching unit 43 is provided has been described, these may be provided in the monitor 50, and the same effect can be obtained. At this time, the control signals sent from the VTR to the monitor 50 are two control signals i and j, but these may be combined into one.

Further, although the video signal and the control signal are separately connected to the monitor 50 in the first embodiment, these may be combined into one. For example, HD sent to the monitor 50
There is a method of superimposing a control signal on the signal by DC (direct current). This is a DC value for each control signal (control signal i is 2 volt,
The control signal j is set to 4 volts, and the DC value is added to the HD signal, which is originally an AC (alternating current) signal, and the result is sent to the monitor 50. The monitor 50 detects this DC value and switches the corresponding switching unit. With such a method, the same effect as that of the first embodiment can be obtained.

In the first embodiment, as a means for detecting the duty ratio of the CTL signal, a CT is used by using a counter.
Although the method of measuring the time from the rising edge to the falling edge of the L signal has been described, the horizontal synchronizing signal included in the reproduced video signal from the rising edge to the falling edge of the CTL signal may be counted, The same effect can be obtained. CTL signal 1 for NTSC signal
Since there are 525 horizontal synchronization signals in a cycle, the duty ratio is 6
2.5% "L" CTL signal is about 328 horizontal sync signals
This, the CTL signal of "S" with a duty ratio of 57.5% is 3
It can be identified with 01 lines.

Example 2. In the first embodiment, the case where only the "L" or "S" CTL signal is continuously written according to the video signal to be recorded has been described.
The combination of "L" and "S" CTL signals is not limited to this. For example, as shown in FIG. 10, when the HD signal is recorded, the CTL signals of "L" and "S" are alternately alternated twice, and when the NTSC signal is recorded, the CTL signals of "L" and "S" are repeated once. A combination of alternately arranging each of them may be changed for each video signal to be recorded, and the same effect can be obtained.

Example 3. A third embodiment of the magnetic recording / reproducing apparatus of the present invention will be described with reference to FIG. FIG. 11 is a block circuit diagram of the third embodiment, and the same reference numerals as those in FIG. 1 denote the same or corresponding portions. In the figure, 70 is an HD / N that converts an HD signal into an NTSC signal.
A TSC conversion unit, 71a and 71b are switching units, 72 is a reservation time and a reserved program, and a timer microcomputer (hereinafter referred to as "timer microcomputer") for detecting the overlapping period of the reserved programs, and 73 is a reservation setting screen. Is a display unit for displaying. In each of the following embodiments, the signals output from the respective tuners are asynchronous, so in the case of simultaneous recording of two programs, a frame synchronizer that synchronizes the signal processing and synchronizes the phases of the signals is required. However, in each embodiment described below, illustration is omitted for convenience of description. Also, the recording signal post-processing unit configured by FM modulation or the like is omitted for convenience of description.

Next, the operation will be described. The reservation operation is
It is executed according to the flowchart as shown in FIG. Today's date is July 25, 1993 (Sunday), and among the three programs on the following day 26 shown in FIG. 13, the reserved program 1 (P1) and the reserved program 2 (P2) are reserved first,
The reserved program 3 (P3) will be reserved later. First,
A reservation setting button (not shown) on the operation unit 23 is pressed. The timer microcomputer 72 displays a reservation screen on the display unit 73 according to the input. While watching the reservation screen, the user can watch HD broadcast channel 1 from 19:00 to 20: 3.
The document program of 0 is reserved (step 130).
Next, NTSC broadcast channel 6 from 21:00 to 23:
The drama program of 00 is reserved as shown in FIG. 14, and the reservation setting button is pressed to end the reservation setting (step 13).
1). The timer microcomputer 16 determines whether or not there is an overlapping period in the set reserved programs (step 1
32). If there is no overlapping period, the reservation setting display is ended (step 133), and the temporary reservation setting operation is ended.

After a while, the user noticed that he had forgotten to reserve the variety program of NTSC broadcast channel 10 from 20:00 to 22:00 on the next day, and made the reservation setting (FIG. 15 (a)) in the same manner as above. Then, the reservation setting is completed in step 131. In step 132, the overlapping period is determined. At this time, since P1 and P2 and P2 and P3 overlap, the process moves to step 134. The timer microcomputer 72 informs the user through the display unit 73 that the overlapping period exists, and also asks the user whether to correct the reservation setting, that is, whether two programs can be simultaneously recorded in the overlapping period (Fig. 15 (b)).

If the user makes a mistake in the reservation setting or does not record two programs at the same time, he / she selects "No". Therefore, the procedure returns to step 130 to make the reservation setting again. Two
If simultaneous recording of the program is to be performed, "Yes" is selected, and thus the process proceeds to step 136. In this embodiment, it is not possible to simultaneously record three or more programs. Since the overlapping programs are two programs, the process moves to step 137, and at step 137, the two programs are simultaneously recorded in FIG. 15 (c).
Is displayed on the reservation setting screen. In this display,
A indicates that the program is recorded on the TA track during the overlap period, and B indicates that it is also recorded on the TB track.

At 19:00 on the 26th in such a state, the timer microcomputer 72 starts the reservation recording operation for recording the P1 document program. First, the timer microcomputer 72 sets the music selection of the HD tuner 11 as one channel, and the system microcomputer 24 sets the switching units 15a, 1
5b is switched to the HD signal processing unit 14 side. H
The video signal obtained from the D tuner 11 is divided into two by the HD signal processing unit 14, and the T signal is divided by each head.
It is recorded on both A and TB tracks.

Next, at the time of 20:00, the timer microcomputer 72 records the P1 document program and the P3 variety program, but since P1 uses two tracks for the HD signal program, it remains as it is. Therefore, two programs cannot be recorded simultaneously. Therefore, the timer microcomputer 72 changes the switching unit 71a to the HD / NTSC conversion unit 70.
The switching unit 15a on the side of the first NTSC signal processing unit 1
The switching unit 71b is provided on the second side with the second NTSC tuner 1
0, the system microcomputer 24 is instructed to switch the switching unit 15b to the second NTSC signal processing unit 13 side, and at the same time, the second NTSC tuner 10 selects 10 songs.
Make it a channel. By doing this, HD tuner 11
HD signal from the HD / NTSC converter 70
Converted to TSC signal, P1 document program is TA
It is recorded on the track as an NTSC signal. The video signal from the second NTSC tuner 10 is also recorded on the TB track as a variety program. By doing so, two programs can be simultaneously recorded.

Next, when the time becomes 20:00, the switching section 15a is switched to the midpoint, and the HD broadcast P1
The recording of the document program of is ended. Variety program of P3 which is NTSC broadcast is continuously recorded. In addition,
The middle point of the switching units 15a and 15b means no signal recording, and is physically represented by 3 inputs for convenience of explanation.

Next, when the time becomes 21:00, the timer microcomputer 72 selects the first NTSC tuner 9 to select the music.
Channel, and the system microcomputer 24 uses the switching unit 7
1a to the first NTSC tuner 5 side, switching unit 15
a is switched to the first NTSC signal processing unit 12 side. The video signal obtained from the first tuner 9 is the first NTSC.
It is recorded on the TA track via the signal processing unit 12, and 22:
Until the variety program ends at 00, two screens are simultaneously recorded on both TA and TB tracks.

Next, at 22:00, the system microcomputer 24 switches the switching unit 15b to the midpoint and TB
Recording of the video signal on the track is completed, and further 23:00
When it reaches 0, the tape 4 is stopped and the series of reserved recording operations is completed. The recording pattern of the program recorded by this recording reservation is recorded on the TA and TB tracks as shown in FIG. In the actual pattern, as shown in FIG. 32, the recording tracks are drawn diagonally in the tape traveling direction by the helical scanning method, and in the case of simultaneous recording of two programs, the tracks are alternately recorded. It is expressed simply and conceptually.

When two programs of HD broadcasting and NTSC broadcasting are overlapped and simultaneously recorded, the signal converted into the NTSC signal through the HD / NTSC converter 8 is forcibly recorded on the TA track. is doing. This is because if the system microcomputer 24 automatically reproduces the TA track even if the recorded HD broadcast program is changed to an NTSC signal for recording two programs in the middle of reproduction, the user can switch screens, etc. This is so that the same program can be continuously watched without any troublesome operation.

After the reservation setting is made in FIG. 15C, NTSC broadcast channel 8 from 21:30 to 23:
Suppose that 30 programs are reserved and set (FIG. 17 (a)),
At this time, since three programs are reserved for only 30 minutes from 21:30 to 22:00, the timer microcomputer 72 informs the user of this in step 134. If the user requests the simultaneous recording of two programs without correction in step 135, the process proceeds from step 136 to step 138, and in step 138 the program of P4 with the latest reservation start time is not recorded for 30 minutes. C is displayed next to P4 in FIG. 17B in order to notify the user. Then, the process moves to step 136 again, and B is displayed beside P4 in order to inform the user that the program of P4 after 22:00 will be simultaneously recorded with the program of P2. As a result P
The display next to 4 is CB. If the user has step 13
If the correction is requested in step 5 and the start time of the program of P4 is corrected to 22:00, the display next to P4 means that the program of P4 is recorded on the TB track by simultaneous recording of two programs.
Becomes This allows the user to know in advance how the reserved program will be recorded on the tape.

On the other hand, even when the reserved recording is performed, the identification signal representing the video signal is written for each video signal while being superimposed on the CTL signal. For example, since a document program which is an HD signal is recorded from 19:00, an identification signal representing the HD signal is written at the same time when the video signal is recorded.
From 20:00, document programs and variety programs converted to NTSC signals are recorded for simultaneous recording of two programs, so the program starts from 20:00 a little before (eg, the time of 10 CTL signals) HD. At the same time the signal is recorded, the identification signal representing the NTSC signal is written. At 20:00, the NTSC signal is recorded and the identification signal representing it is also written. By writing this identification signal, when the recorded document program is reproduced, even if the HD signal is changed to the NTSC signal during reproduction, the reproduction signal can be swiftly switched including switching of the monitor.

Since this series of operations has been described in detail in the above-described first and second embodiments, it will not be described in further detail here. In addition, Example 4 described below
The description of writing and reading of the identification signal will be omitted hereafter. Along with this, in FIG. 11, the illustration of the CTL signal generator 18, the CTL signal detector 19, and the CTL head 7 for reading and writing the identification signal is omitted for simplification of description.

Example 4. In the above-mentioned Example 3, first HD
The case where the broadcast is reserved and recorded and then the NTSC signal is reserved and recorded has been described. However, as shown in FIG. 18A, the NTSC signal is reserved and recorded first, and then the HD signal is reserved and recorded to the mutual programs. The same applies when there is an overlapping period. That is, first, as shown in FIG.
From 9:00, the program of P1 which is an NTSC signal is recorded on the TA track. From 20:00 to 2 during the overlapping period
During 0:30, the program of P1 is recorded on the TA track, and the program of P2, which is an HD signal, is switched by the switching unit 71.
b to the HD / NTSC conversion unit 70 side, and the switching unit 15b
Are switched to the second NTSC signal processing unit 13 side, the HD signal is converted into an NTSC signal, and two programs are simultaneously recorded. After 20:30, the switching unit 15a,
15b is switched to the HD signal processing unit 14 side, and recording is performed while distributing the HD signal to two tracks.

As described above, when there is an overlap period between the reserved HD signal program and the NTSC signal program, the HD signal in the overlap period is converted into an NTSC signal by the HD / NTSC converter 70, and the NTSC signal is converted. Since two programs are simultaneously recorded, both programs can be recorded even if the two programs overlap.

Example 5. FIG. 19 is a block circuit diagram of the fifth embodiment of the present invention, in which the same reference numerals as those in FIG. 11 denote the same parts, respectively, and 74 is a program extension determination unit for determining whether or not the program being broadcast is extended, The determination result is input to the timer microcomputer 72. In the third embodiment, a case has been described in which two programs for which reservation settings have been made have an overlapping period. In the fifth embodiment, an operation will be described in the case where the overlapping period does not exist when the reservation is set, but the overlapping period exists due to the program extension.

The user looks at the reservation screen on the display unit 17 and, as shown in FIG.
From 21:00 to 21:00, it is set to record the drama of NTSC broadcasting channel 4. Since there is no overlapping period between these two programs, the reservation setting ends as it is according to the flowchart of FIG.

When the timer set time comes, the timer microcomputer 72 follows the flow chart of the reservation recording operation of FIG.
The HD tuner 7 is selected for channel 1 in order to perform the reserved recording of. The system microcomputer 15 is a switching unit 13
Each of a and 13b is switched to the HD signal processing unit side, and the capstan 22 is controlled so that the tape runs at standard speed. The video signal output from the HD tuner 7 is H
The D signal processing unit 12 divides the data into two and records the respective tracks (step 140).

Next, when the time becomes 21:00, the timer microcomputer 72 sets the first NTSC tuner 5 to 4 channels in step 142 in order to record the drama of P2, and sets the switching unit 13a to the first NTSC signal processing unit. 10
To the side, the switching portion 13b is switched to the middle point, and the capstan 22 is controlled so that the tape runs in the long time mode. At this time, the tape runs at a pitch equivalent to the head width during the half rotation of the drum.
As described above, the tracks recorded by the heads 1a and 2a are alternately arranged on the tape 4. At 23:00, the tape is stopped in step 143 and a series of reserved recording operations are completed.

In recent sports programs, for example, in the case of baseball and soccer, it is not possible to broadcast the game to the end in a two-hour frame including an extra game, and usually the broadcast time is often extended as time permits. . In the reservation setting of FIG. 20, even if a sports program is extended, the next program is set to be reserved and recorded in another channel in the reservation, so that the program for the extended time cannot be recorded.

In order to solve this problem, the program extension judging section 74 is newly provided in the fifth embodiment. this is,
This is to determine whether the program currently being broadcast has been extended. Regarding the determination method of the program extension determination unit 74 described here, for example, in the case of baseball broadcasting, a characteristic scene of baseball broadcasting is extracted, and as long as the extraction result exists, the baseball broadcasting is broadcast. That is, if the baseball broadcast is extracted after the scheduled broadcast end time, it may be determined that this baseball broadcast has been extended, or
When the program is extended, a signal for extending the program may be added to the broadcast signal from the broadcasting station side, and this signal may be detected by the receiving side. The program extension is not limited to these. .

The program extension determining section 74 corresponds to step 141 in the flowchart of FIG. When it is determined that the program of P1 in the reservation recording is extended, the process proceeds to step 144, the extension time of P1 and P2 reserved later.
Judging whether or not the reservation time of is overlapping. P
If the program of No. 1 does not overlap with the program of P2 even if the program is extended by the maximum length (for example, if the program of P1 and P2 has a one-hour gap and the program of P1 is extended by 30 minutes), the process proceeds to step 142. , P1 extension programs and P2 reservation recording described above. In the reservation setting of FIG. 20, if the program of P1 is extended, it will overlap with the program of P2.
Go to 5.

During this extended time, two programs P1 and P2 are simultaneously recorded. Since P1 is an HD program, the system microcomputer 24 switches the switching unit 71a to the HD / NTSC conversion unit 70 side and the switching unit 15a to the first NTSC signal processing unit 12 side, and is the HD program P1.
Only the extension time of is converted to NTSC signal and recorded on the TA track. In addition, the timer microcomputer 72 is the second NTS
The channel selection of the C tuner 10 is set to 4 channels, and at the same time, the system microcomputer 24 sets the switching unit 15b to the second NTS.
Switching to the C signal processing unit 13 side, the P2 program is recorded on the TB track due to the extension of the P1 program. Since two programs are recorded simultaneously, the capstan 8 is controlled so that the tape speed becomes the standard mode.

When the extension of the program of P1 is completed, only the program of P2 is recorded. Originally, the P2 program is set to be reserved and recorded in the triple mode, so the tape speed is returned to the triple mode. The timer microcomputer 72 sets the channel selection of the first NTSC tuner 9 to 4 channels and, at the same time, sets the switching unit 15b to the middle point to record the program of P2. FIG. 23 conceptually shows the recording pattern when the time is not extended and when the time is not extended. If the P2 program was set to record in standard mode, the second NTSC tuner selection would remain on channel 4,
The system microcomputer 24 switches the switching unit 15a to the middle point and subsequently records the program of P2 on the TB track.
When the reservation end time of P2 is reached, the reservation recording is ended in step 153.

Example 6. In the above-mentioned fifth embodiment, the extended program is an HD signal program.
The case of overlapping with the C signal program has been described, but the present invention is not limited to this. For example, the leading program to be extended is a program of NTSC signal, and the trailing H
It may overlap with the D signal program. In this case, first, a program of an NTSC signal which is a preceding program is reserved and recorded. When the program is extended and overlaps with an HD signal program to be recorded later, the P1 program is recorded on the TA track, the overlapping HD signal program is converted into an NTSC signal, and two programs are simultaneously recorded during the overlapping period. Do. If P1 is extended, P
Recording is performed while distributing the HD signal, which is the second program, to two tracks. When this recording pattern is conceptually expressed,
It becomes like FIG.

Example 7. The preceding program to be extended is NT
The program is an SC signal, and a program overlapped by being extended may be an NTSC signal. At this time, during the overlap period, the preceding program of the extended NTSC signal is recorded on the TA track, and the trailing program of the overlapping NTSC signal is recorded on the TB track, so that two programs are simultaneously recorded. FIG. 25 conceptually shows this recording pattern.

As described above, when there is no overlap period during the reservation setting and the programs are extended to cause an overlap period between the reserved programs, the HD in the overlap period is increased.
Signal programs are converted to NTSC signals, and during the overlapping period, both the leading and trailing programs are recorded simultaneously with the NTSC signal, so both are extended even if an overlapping period occurs in the two programs. The program of can be recorded.

Example 8. FIG. 26 is a block circuit diagram of the present invention, in which the same reference numerals as those in FIG. 19 denote the same parts, 5 is a supply reel for supplying the tape 4, and 75 is a signal proportional to the rotation speed of the supply reel. A supply reel FG (Frequency Generator) unit 6 is a take-up reel for winding the tape 4, and a take-up reel FG unit 76 outputs a signal proportional to the rotation speed of the take-up reel.

Next, the operation will be described with reference to the flowchart of FIG. The user reserves and records 3 hours of HD broadcast by the above-mentioned reservation setting (flowchart in FIG. 12), but it is assumed that the remaining amount of the recording tape is only 2 hours. In such a state, the timer microcomputer 72
When the reservation start time arrives, the system microcomputer 24 is instructed to switch the switching units 15a and 15b to the HD signal processing unit 12 side, and the reserved recording operation is performed at the tape speed in the standard mode (step 150). The HD signal is distributed to two heads that are adjacent to each other, and the tape is run at a pitch three times the head width as a standard mode, so the recorded tape is as shown in the left half of FIG.

On the other hand, the tape remaining amount is determined by the supply reel FG section 7
5. F proportional to the rotation speed from the take-up reel FG section 76
The G signal is input to the system microcomputer 24 to perform calculation in the microcomputer, and the timer microcomputer 72 outputs serial data.
Sent to. In step 151, the timer microcomputer 72 calculates the reserved recording time from the reservation start time and the end time and compares it with the remaining tape time calculated previously. If the remaining tape amount is long, the HD signal is distributed to two tracks and recorded on the tape in the standard mode until the reservation end time (step 156). If the remaining tape is short, move to the next step.

If the tape remaining time when recording in the standard mode is shorter than the reserved program time, recording is performed at the tape speed in the standard mode at the beginning, and recording is performed in the long time mode where the tape speed is ⅓ at the optimum position. do it. In step 152, the switching time of the recording mode is calculated. This is derived by a simple operation. For example, to record a 3-hour HD program on a 2-hour tape, first record the HD signal for 1 hour and 30 minutes in the standard mode, then convert the HD signal to an NTSC signal, and then convert the NTSC signal to 3 minutes. Recording may be performed for 1 hour and 30 minutes in the long time mode of 1.

Therefore, when the tape remaining time when the HD signal is recorded in the standard mode in step 153 reaches 30 minutes, the process proceeds to step 154 and the system microcomputer 24
Receiving a command from the timer microcomputer 72, the switching unit 71a
To the HD / NTSC conversion unit side 70, the switching unit 15a to the first NTSC signal processing unit 12 side, and the switching unit 15b.
To the middle point, and in step 155, the capstan 23 is controlled so that the tape speed becomes one third of the standard mode. After that, until the reservation end time, NTS
The HD broadcast converted into the C signal is recorded. At this time, only one set of heads 1a and 2a is recorded, and the tape in the long mode travels by one head width per field. Therefore, the tape does not have a guard band like the right half of FIG. A pattern is formed.

As described above, when the remaining tape time is shorter than the HD broadcast time to be reserved and recorded, the HD signal is first recorded in the standard mode, and the HD signal is calculated at the optimum position calculated by the timer microcomputer. Since the NTSC signal is converted into the NTSC signal and the converted NTSC signal is recorded in the long time mode, the HD broadcast can be recorded to the end even on a tape having a short tape remaining amount.

Example 9. In addition, the above-mentioned Example 3 to Example 8
With the head arrangement shown in FIG. 31, when recording HD signals, the two heads 1a, 1b, and 2a, 2b alternate every one field, and the tape 4 has a head width of 3 during one half rotation of the drum. Run at double pitch and output HD signal 2
Record while distributing to tracks, NTSC
The case where two heads 1a and 2a are alternately driven for each field when recording a signal and the tape is run at one-third of the time when an HD signal is recorded has been described. Hereinafter, another recording format will be described with reference to FIGS. 29 and 30.

The head arrangement shown in FIG. 29 is the same as that of the third embodiment.
8 to 8, but the recording method is different. First, the video signal to be recorded is compressed into a digital video signal. And the number of rotations of the drum 3 is 9000 rpm,
When digitally recording the compressed HD signal, the tape 4 is run at a pitch twice the head width every half rotation of the drum so that one frame of the HD signal is recorded on 20 tracks. Further, when digitally recording a compressed NTSC signal, if the drum is rotated while the head is driven with two heads 1a and 1b, and the tape is run at half the HD signal recording time, Track patterns as shown in FIGS. 30A and 30B are formed, respectively.

Even in such a recording system, one V
The TR can record two different signals, HD signal and NTSC signal, and the tape running speed when recording the NTSC signal is half that when recording the HD signal.
Is the speed of. Similar to the third to eighth embodiments, when it is determined that the remaining tape time is shorter than the HD broadcast time to be recorded at the time of reserved recording, the timer microcomputer is set to NT.
The switching time for recording with the SC signal is calculated. Then, the program is recorded as an HD signal, and at the switching time, the timer microcomputer converts the HD signal into an NTSC signal,
If the program is recorded by the converted NTSC signal, the HD broadcast can be recorded to the end even on a tape having a short remaining amount.

Further, in the above third to eighth embodiments, the description has been made of the case where the identification signal representing each video signal is written while being superposed on the CTL signal when performing the reserved recording, but the present invention is not limited to this. . For example, as shown in FIG. 30, a data area 80 may be provided in a part of a track for writing a video signal, and an identification signal indicating the type of the video signal may be written in the data area 80.
The same effect can be obtained by writing the identification signal indicating the type of the video signal in a part of the vertical blanking period of the video signal.

In the third to eighth embodiments, the timer microcomputer 72 controls the reservation and the like and the system microcomputer 24 controls the switching unit and the like. However, the functions of these two microcomputers are combined into one microcomputer. The same effect can be obtained even if this is done.

In each of the above embodiments, the case of simultaneous recording of two programs has been described. However, a new rotary head for recording a signal on the track corresponding to the guard band of FIG. 32 is newly provided, and an NTSC signal is provided here. May be recorded simultaneously to record three programs, or the same effect can be obtained by recording an audio signal or a data signal and writing this data signal as an identification signal indicating the type of the video signal.

Further, in each of the above embodiments, the NTSC signal and the HD signal have been described as the video signal, but the same effect can be obtained with the PAL signal and the SECAM signal.

Further, in each of the above-described embodiments, an example in which a tuner is used as a signal source of a video signal has been described, but even if an output signal from another signal source, for example, another VTR or the like is input from the external input terminal. The same effect can be obtained.

In each of the above embodiments, the video signal is described as the information signal, but the same effect can be obtained with an audio signal, a signal in which a video signal and an audio signal are multiplexed, or the like.

[0104]

As described above, according to the present invention,
When recording and reproducing information signals of at least two or more signal systems on one recording medium, when an identification signal corresponding to the information signal to be recorded is written and reproduced, the identification signal to be read is discriminated. Since the reproduction signal processing means suitable for the recorded information signal is selected based on the discrimination result, the information signal can be promptly reproduced without using a complicated discrimination means or a circuit.

Also, the duty ratio of the CTL signal is changed by a predetermined amount according to the signal system of the information signal to be recorded, and when writing and reproducing, the duty ratio of the CTL signal to be read is discriminated, and based on this, suitable for the information signal. Since the reproduction signal post-processing unit is switched, different information signals can be promptly switched and reproduced without using a complicated discriminating means.

Also, at the time of reservation recording, a program of A system and B
If an overlapping period occurs in the program of the system, A during the overlapping period
Since the program of the B format is converted into the signal of the B format and the program after the B format conversion and the overlapping program are recorded at the same time during the overlapping period, it is possible to record a plurality of overlapping programs. There is.

Further, even when there is no overlap period between the preceding program and the succeeding program at the time of reserved recording, even if the preceding program is extended and an overlapping period occurs with the succeeding program, There is an effect that it is possible to simultaneously record a plurality of programs during the overlapping period caused by the extension.

If the remaining time of the medium is shorter than the reserved time of the program of the A system, the sum of the recording time at the traveling speed of the medium of the A system and the recording time at the traveling speed of the medium of the B system is the remaining medium. The switching time from the A system to the B system is calculated so as to be equal to the quantity time, and when the switching time comes during the reservation recording of the A system program, the A system program is converted into the B system signal. Since the converted signal is recorded as a B-system program after the switching time, there is an effect that all A-system programs can be recorded even when the medium remaining time is short.

If the number of overlapping programs is less than or equal to the number of programs that can be simultaneously recorded, the program to be recorded in which area is displayed, the overlapping programs are recorded, and the number of overlapping reserved programs can be simultaneously recorded. If the number is greater than the number, the unrecordable duplicate program among the duplicate programs is displayed and the program is not recorded. Therefore, the user can confirm the state of the reserved duplicate program.

[Brief description of drawings]

FIG. 1 is a block circuit diagram showing a configuration of a video signal recording system according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a duty ratio of a CTL signal according to the first embodiment.

FIG. 3 is a diagram showing an identification signal according to the first embodiment.

FIG. 4 is a flowchart of identification signal writing according to the first embodiment.

FIG. 5 is a diagram showing an identification signal writing operation of the first embodiment.

FIG. 6 is a block circuit diagram showing a configuration of a video signal reproducing system according to the first embodiment.

FIG. 7 is a flowchart of identification signal reading according to the first embodiment.

FIG. 8 is a block circuit diagram of an output signal switching unit according to the first embodiment.

FIG. 9 is a block circuit diagram showing another configuration example of the output signal switching unit and the monitor according to the first embodiment.

FIG. 10 is a diagram showing a duty ratio of a CTL signal according to the second embodiment of the present invention.

FIG. 11 is a block circuit diagram showing a configuration of a video signal recording system according to a third embodiment of the present invention.

FIG. 12 is a flowchart of a reservation operation according to the third embodiment.

FIG. 13 is a diagram showing a timetable of reserved programs according to the third embodiment.

FIG. 14 is a diagram showing a reservation setting display according to the third embodiment.

FIG. 15 is a diagram showing a reservation setting display according to the third embodiment.

FIG. 16 is a conceptual diagram showing a recording pattern of a tape of Example 3.

FIG. 17 is a diagram showing a reservation setting display according to the third embodiment.

FIG. 18 is a conceptual diagram showing a reservation setting display and a tape recording pattern according to the fourth embodiment of the present invention.

FIG. 19 is a block circuit diagram showing a configuration of a video signal recording system according to a fifth embodiment of the present invention.

FIG. 20 is a diagram showing a reservation setting display according to the fifth embodiment.

FIG. 21 is a flowchart of reservation recording according to the fifth embodiment.

FIG. 22 is a diagram showing a track pattern of NTSC signal long-time mode recording in Example 5;

FIG. 23 is a conceptual diagram showing recording patterns on a tape when a reserved program of the fifth embodiment is extended and when it is not extended.

FIG. 24 is a conceptual diagram showing a recording pattern of a tape when a reserved program is extended and when it is not extended according to the sixth embodiment of the present invention.

FIG. 25 is a conceptual diagram showing recording patterns on a tape when a reserved program is extended and when it is not extended according to the seventh embodiment of the present invention.

FIG. 26 is a block circuit diagram showing a configuration of a video signal recording system according to an eighth embodiment of the present invention.

FIG. 27 is a flowchart of reservation recording according to the eighth embodiment.

28 is a diagram showing a track pattern of the tape of Example 8. FIG.

FIG. 29 is a diagram showing a head arrangement and tape track patterns according to a ninth embodiment of the present invention.

FIG. 30 is a diagram showing a track pattern of Example 9.

FIG. 31 is a diagram showing a head arrangement of a conventional example and each example.

FIG. 32 is a diagram showing a conventional track pattern.

FIG. 33 is a conceptual diagram showing a recording pattern in reservation recording of a conventional example.

[Explanation of symbols]

 1a rotary head 1b rotary head 2a rotary head 2b rotary head 7 CTL head 12 first NTSC signal pre-processing unit 13 second NTSC signal pre-processing unit 14 HD signal pre-processing unit 15a switching unit 15b switching unit 18 CTL signal generating unit 19 CTL signal detection unit 20 CTL signal switching unit 22 output signal switching unit 24 system microcomputer 32a switching unit 32b switching unit 33 first NTSC signal post-processing unit 34 second NTSC signal post-processing unit 50 monitor 70 HD / NTSC conversion 71a switching unit 71b switching unit 72 timer microcomputer 73 display unit 74 program extension determining unit

Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04N 5/7826 5/92 9/80 H04N 9/80 A 8224-5D G11B 27/28 A

Claims (6)

[Claims] 1. A magnetic recording / reproducing apparatus comprising a plurality of information signal recording means for recording information signals of at least two or more signal systems, and a plurality of information signal reproducing means for reproducing recorded information signals. An identification signal generating means for generating an identification signal for identifying each of the plurality of information signals, and an identification signal corresponding to the information signal when the information signal is recorded using the information signal recording means Is written on a track different from the information signal, identification signal reading means for reading the identification signal when reproducing the information signal, identification signal determining means for determining the read identification signal, and A magnetic recording / reproducing apparatus comprising means for selecting the information signal reproducing means on the basis of the discrimination result of the discrimination signal discriminating means and reproducing the information signal. 2. The identification signal is a signal in which a signal having a phase difference of a polarity opposite to that of the control signal is written between a control signal recorded on a control track and written at a constant timing together with an information signal. , A plurality of the phase differences are provided, the combinations of the phase differences are written differently for each of the plurality of information signals, the combination of the phase differences is discriminated by the identification signal discriminating means, and the information signal is determined based on the discrimination result. 2. The magnetic recording / reproducing apparatus according to claim 1, wherein the reproducing means is selected to reproduce the information signal. 3. At least two of the plurality of programs are signals of different systems (simply A system and B system) from each other, and if they are programs of different systems (A system and B system), they are reserved and recorded separately. In the magnetic recording / reproducing apparatus capable of recording or recording a plurality of programs at the same time by the same method (B method), a reservation for storing start time and end time for reservation of a plurality of programs, respectively. Time storage means, reserved program duplication period detection means for detecting the duplication period of programs of different methods from the times stored in the reserved time storage means, and program of type A for signal of type B when the duplication period exists. A magnetic recording / reproducing apparatus comprising: means for converting to B. and means for simultaneously performing reserved recording of a program after the B format conversion and another overlapping B system program during the overlapping period. 4. At least two of a plurality of programs are signals of different systems (simply A system and B system), and if the programs of different systems (A system and B system) are recorded separately, In the magnetic recording / reproducing apparatus capable of recording or recording a plurality of programs at the same time by the same method (B method), a reservation for storing start time and end time for reservation of a plurality of programs, respectively. The time storage means, the program extension detection means for detecting whether or not the program being recorded in advance reservation has been extended after the reservation end time, the extension time of the preceding program and the reservation time of other trailing reservation programs overlap. Reserved program overlapping period detecting means for detecting whether or not there is an overlapping period, and means for simultaneously recording and recording a plurality of overlapping programs when an overlapping period exists. Place 5. At least two of the plurality of programs are signals of systems different from each other (simply A system and B system), and the traveling speed of the magnetic recording medium for recording the B system programs is the A system. Slower than the running speed of the magnetic recording medium
Reservation time for detecting the time of the reserved program from the start time and the end time related to the reservation of the program of the A method in a magnetic recording / reproducing apparatus capable of separately recording the programs of the A method and the B method separately on one magnetic recording medium. Detection means, medium remaining amount detection means for detecting the remaining time of the medium at the traveling speed of the medium for recording the A-system program, and comparison means for comparing the reserved time and the medium remaining time of the A-system program. If the medium remaining time is shorter than the reserved time of the program of the A system, the sum of the recording time at the traveling speed of the medium of the A system and the recording time at the traveling speed of the medium of the B system is almost equal to the remaining time of the medium. A switching time calculating means for calculating switching times from the A system to the B system so as to be equal to each other, and a program of the A system is converted into a signal of the B system when the switching time is reached during reserved recording of the A system program. Means to do After switching time B signals converted
A magnetic recording / reproducing apparatus comprising means for recording as a system program. 6. A reservation time for storing a start time and an end time relating to the reservation of N programs in a magnetic recording / reproducing apparatus capable of recording N (N is an integer of 1 or more) programs at the same time. Storage means, reserved program duplication detection means for detecting the duplication period and the number of duplication programs from the storage time of the reserved storage means, and duplication program display means for displaying the existence of the duplication program when the duplication program is detected. If the duplicated programs are recorded at the same time, the number of duplicated programs is N
If the number is less than or equal to N, all N or less programs are displayed together with which program is recorded in which area,
Alternatively, if the number is more than N, a duplicate program display means for displaying that all programs are not simultaneously reserved and recorded together with the unrecorded programs, and a reservation recording means for making a reservation recording of the overlapping programs according to the display are provided. Magnetic recording / reproducing device.