JPS6360678A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To attain a switching without a misoperation at the time of selectively viewing a TV picture and a VTR character signal by detecting that the transmission terminal of a TV input switching signal is loaded, and setting the antenna switching of a VTR to a forced 'through' state. CONSTITUTION:For viewing the character signal of the VTR on a TV screen, a condition signal generation means 1 generates a condition signal 8, and a TV input switching signal transmission terminal 2 outputs a TV input switching signal 3. A TV input switching means 4 switches the TV input switching to the selection of an outside signal input in accordance with the signal 3. A load detection means 5 simultaneously detects that the terminal 2 is loaded, sends an antenna switching signal 6, and an antenna switching means 7 switches the antenna of the VTR to the 'through' state. For viewing the TV picture in a state when the VTR character signal is viewed in the TV screen, the means 1 releases the generation of the signal 8, and the signal 3 switches the input switching of the TV from the selection of the outside signal input to that of an inside signal input.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is applicable to, for example, a video tape recorder (hereinafter referred to as V
A magnetic recording and reproducing device that connects the above-mentioned VTR and TV so that character signals such as the time generated by the clock attached to the TR can be viewed on the screen of a television receiver (hereinafter referred to as TV). The present invention relates to antenna switching and TV input switching.

[Prior Art] FIG. 3 shows a schematic block diagram of VTR antenna switching and TV input switching in a conventional magnetic recording and reproducing apparatus of this type.

In the same figure, <1) means VTR status signal generation means, (4
) is a TVV force switching means, and (7) is a VTRTR amplifier means, each of which is configured to function independently.

Next, the operation of the above configuration will be explained.

For example, when a user connects a VTR and a TV.

When checking the time generated by the VTR clock on the TV screen, there are two ways to connect the two: RF connection and AV connection. The operation according to each connection method will be explained below.

(+) In the case of RF connection When viewing a TV image, select internal signal input using the TV input means 4), and select channel 1 or 2 of the TV. Next, select EE in yellow using the antenna switching means (7) of the VTR, and select a desired channel on the VTR.

When a character signal such as the time of a VTR clock is to be viewed on a TV screen, the internal signal input is selected using the TV input switching means (4), and the TV channel 1 or 2 is selected. For VTR antenna switching, select EE.

Thereafter, even if the character signal generating means of the VTR is released, the antenna remains selected at EE.

(2) In the case of AV connection When viewing TV images, select internal signal input with the TV input switching means (4), select the TV channel to the desired channel, and use the VTR antenna switching means (7) to select the internal signal input. Select.

When viewing character signals from a VTR, use the TV input switching means (
4) Select external signal input.

[Problems to be Solved by the Invention] Conventional magnetic recording and reproducing devices are configured as described above, so in the case of AV connection, the user is watching a TV image, that is, the input switching of the TV is internal. Select signal and TV
If you try to view a character signal on a VTR while the desired channel is selected by the user.

After setting the VTR to a character signal generation state, switch the TV input from internal signal input to external signal input.8
It is a fruit.

In addition, if the VTR's antenna switching or EE is selected when the character signal generation state of the VTR is canceled, even though the character signal generation state of the VTR is canceled,
Not only is the RF signal input from the antenna to the VTR not input to the TV, but the input switch on the TV side or external signal input remains selected. Therefore, in order to view TV images, it is necessary to switch the VTR's antenna and select through, and then switch the TV's input to select internal signal input.

As described above, the conventional apparatus has the drawback that when arbitrarily and selectively viewing a TV image and a character signal of a VTR, complicated and troublesome manual operations are required to switch the TV input and the VTR antenna.

This invention was made to solve the above-mentioned problems, and aims to automate the operation when selectively viewing TV images and VTR character signals, and to perform error-free switching. The purpose of the present invention is to provide a magnetic recording/reproducing device that can perform the following functions.

[Means for Solving the Problems] The magnetic recording and reproducing apparatus according to the present invention is provided with means for generating a signal indicating the character signal generation state of the VTR, and externally controls input switching of the TV using the signal indicating the character signal generation state. The present invention is characterized in that the antenna switching of the VTR is forced through by detecting that a load is applied to the output terminal of the TV input switching signal at the same time as switching to signal input.

[Function] In this invention, when a character signal from a VTR is viewed on a TV screen, the TV input is automatically switched to external signal input by the output signal from the signal generating means in the character signal generation state. At the same time, the antenna is switched to through based on the detection that a load is applied to the output terminal of the TV input switching signal.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 is a schematic block diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention. In the same figure, (1) is VT
The R state signal generating means generates a signal when the character signal generating means such as a clock is in the character signal generation period. (2) is a TV input switching signal, and (4) is a TV input switching means, which switches the TV input in response to the TV input switching signal (3) described in 1; (5) is a load detection means which detects that a load is applied to the output terminal (2) of the TV input switching signal and outputs a VTR antenna switching signal (6). (7) is an antenna switching means, which is switched by the switching signal (6).

Next, with the above configuration, connect the VTR and TV to the AV
! The operation when fi is continued will be explained.

When a user views a character signal from a VTR on a TV screen, the status signal generating means (1) generates a status signal (8),
A TV input switching signal (3) is output from the TV input switching signal sending terminal (2). In response to this signal (3), the TV input switching means (4) switches the TV input to select the external signal input.

At the same time, the load detection means (5) detects that a load is applied to the TV input switching signal sending terminal (2) and outputs an antenna switching signal (6). As a result, the antenna switching means (7) switches the antenna of the VTR to through.

When a user attempts to view a TV image from a state where a character signal from a VTR is being viewed on a TV screen, the above-mentioned status signal generating means (1) cancels the status signal generation. Then, the TV input switching signal (3) switches the TV input from selecting the external signal input to selecting the internal signal input.

This allows the signal from the antenna to reach the TV and T
It is possible to view TV images without having to perform any input switching operations on the VTR or antenna switching operations on the VTR.

In addition, when the VTR and TV are connected by RF.

The load detection means (5) detects that no load is applied to the TV input switching signal sending terminal (2), and
The antenna switching operation of the TR will be similar to that of the conventional RF connection described above.

FIG. 2 shows the circuit configuration of one embodiment shown in FIG. 1 described above.

In Fig. 2, (11) is the antenna selection switch, (
12) is the antenna toggle control signal, (13) is the first flip-flop (hereinafter referred to as the first FF), (14)
is the second flip-flop (hereinafter referred to as the second FF),
(15) is an output selection switch of the first F F (1:I), which is an output selection switch for the antenna toggle control signal (12).
) is high to select terminal (a), and low to select terminal (b). (6) is an antenna switching signal, which is output by the load detection means (5) consisting of two comparators (5a) and (5b). (17) is an initialization signal when the power is turned on, and when the power is turned on, the first FF
(13) and the second F F (14) are initialized.

Next, the operation of the circuit configuration shown in FIG. 2 above will be briefly explained.

In the case of AV connection, when a character signal is generated, the TV input switching means (4) is switched to select the external signal input by the TV input switching signal (3). At the same time, the load detection means (5) detects the load applied to the terminal (2) and outputs an antenna switching signal (6) to switch the VTR antenna to through.

This signal (6) is differentiated and rtSI F F (13
) Oyohi is input to the reset terminal of the second FF (14), and the first FF (13) and the second FF (
+4) is initialized.

Since the antenna toggle control signal (12) is low.

The output selection switch (15) of the first FF (13) selects the terminal (b) of the first FF (13).

Since the terminal (b) outputs a high level, the antenna switching signal (6) is passed through.

When the character signal is generated or released, the TV input switching signal (3)
becomes low, and the TV input switching means (4) switches to the side that selects the internal signal input.

In the case of the RFPa system, when a character signal is generated, the first F F
(1:l) is triggered and the second F F (+4) is initialized by the differential signal. At the same time, the load detection means (5) detects the load applied to the terminal (2) and outputs the antenna switching signal (6), and the first F F
(13) is not initialized. Anti-natacle control signal (
12) is low, the output selection switch (15) of the first F F (1:l) is set to the first F F (13).
Terminal (b) is selected.

Since the terminal (b) is outputting low, the antenna cut signal (6) selects EE.

In addition, in the above embodiment, the case where the TV manual switching signal sending terminal is provided independently has been described.

This terminal may be a video output terminal or an audio output terminal.

Furthermore, the character signal generating means is not limited to one clock, but may also generate four reserved border pictures, instruction manuals, and the like.

[Effects of the Invention] As described above, according to the present invention, when a VTR and a TV or AV are connected, the input of the TV can be automatically switched, and the antenna of the VTR can also be switched automatically. Can be done. Therefore, the operation when optionally viewing a TV image and character signals generated by a character signal generating means such as a clock attached to a VTR on a TV screen is as follows.
Everything is automated and easy to operate. In addition, there is no mistake in switching the input of the TV or the antenna of the VTR, and inconveniences such as text signals not being transmitted can be reliably avoided.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a circuit diagram of FIG. 1, and FIG. 3 is a schematic diagram of a conventional magnetic recording/reproducing apparatus. (+)...VTR status signal generation means, (2)...T
V input switching signal sending terminal, (3)...TV input switching signal, (4)...TV input switching means, (5)...load detection means, (7)...antenna switching means. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Masanobu Oiwa Figure 1 Figure 3

Claims (1)

[Claims] A character signal generating means, a status signal generating means indicating that the means is in a character signal generation period, a terminal for transmitting the status signal from the means to the television receiver, and a load is applied to the terminal. What is claimed is: 1. A magnetic recording and reproducing device comprising: a load detecting means for detecting a load detecting means; and an antenna switching means for automatically switching to a through antenna according to an output of the load detecting means.