JPH01144273A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce an error in the recording and reproduction of data by deciding whether or not the number of times of recording arrives at the number of times of limitation by comparing recording frequency information with limitation frequency information, and performing the recording and the reproduction of the data on a designated sector or substitute sector based on a decided result. CONSTITUTION:The recording frequency information is compared with limitation frequency information 131 by a recording frequency comparison means 105, and based on comparison information, the recording of the data is performed on the data area of the designated sector when the number of times of recording of the sector is less than the number of times of -1 of the number of times of limitation at the time of recording the data, and when it arrives at the number of times of -1 of the number of times of limitation, the recording of the data is performed on the data area of the substitute sector. Also, at the time of reproducing the data, the number of times of recording of the sector is less than the number of times of limitation, the reproduction of the data recorded on the data area of the designated sector is performed, and when it arrives at the number of times of limitation, the reproduction of the data recorded on the substitute sector is performed based on address information recorded on the data area of the designated sector. In such a way, it is possible to reduce a data error due to the fatigue of an information recording medium.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an information recording/reproducing apparatus for recording or reproducing data on a write-once type information recording medium having a recording area with a track structure consisting of a plurality of sectors. It is.

2. Description of the Related Art Conventionally, there has been an information recording and reproducing apparatus as shown in FIG. 3 for recording and reproducing data on an information recording medium having sectors consisting of a sector identification section and a data section. FIG. 3 shows a block diagram of this device, and 304 is address reading means.

303 is an address comparison means, and 300 is a control means.

301 is a data reproducing means, 302 is a data recording means, 3
05 is a laser drive, 306 is a semiconductor laser, 307
311 is an information recording medium, 311 is a reproduction data signal, 315 is a sector identification part reproduction signal, 316 is a reproduction address signal, 31
7 is an address match signal, 318 is a target address signal, 3
08 is a write signal, 309 is a read signal, 310id
Record data signal.

314 is a reproduction sector signal, 313 is a reproduction request signal, 31
2 is a recording request signal. FIG. 4 is an explanatory diagram of the sector configuration of a conventional optical disc, in which only sector address information exists in the sector identification section.

In the conventional information recording/reproducing apparatus configured as described above, data is recorded and reproduced by the address reading means 304.
The reproduction address signal 316 and the target address signal 318 read by the controller are compared, and if they match, the control means 300 instructs the data reproduction means 301 and the data recording means 302 to record and reproduce data in the target sector, respectively. This was done under the direction of.

Problems to be Solved by the Invention However, with the above configuration, when data is recorded many times in the same sector of a rewritable information recording medium, data may be lost during recording and reproduction due to fatigue of the information recording medium. It was difficult to prevent errors from occurring.

In view of this, the present invention provides information on the limit on the number of times data is recorded on an information recording medium and recording number information that stores the number of times data is recorded in each sector, so that data due to fatigue of the rewritable information recording medium can be stored. An object of the present invention is to provide an information recording/reproducing device that can reduce errors.

Means for Solving the Problems The present invention provides an information recording medium in which the number of times data has been recorded is stored in the sector identification part of the sector, and recording number information is added each time data is recorded. On the other hand, there is provided a limit number storage unit that stores a limit number of times that data can be recorded in a sector, an address reading unit that reads sector address information from a sector identification unit, and an address comparison unit that compares sector address information of the sector identification unit and a target sector address. a recording number comparing means for reading out recording number information from the sector identification section and comparing it with limit number information stored in the limit number storage section; a recording number comparison means for updating the recording number information; and a control means for controlling recording and reproduction to the data section, and the recording number comparison means compares the recording number information and the limit number information. Based on the comparison information obtained, in the case of data recording, if the number of times the sector is recorded is less than the limit number of times, data is recorded in the data area of the specified sector, and the data is recorded in the data area of the specified sector. If the number of times has been reached, the address information of an alternative sector in which data is to be recorded instead of the target sector is recorded in the data area, and from then on, data is recorded in the data area of the alternative sector, and in the case of data reproduction. If the number of times the sector has been recorded is less than the limit, the data recorded in the data area of the specified sector is played back, and if the number of recordings has reached the limit, the address information recorded in the data area of the specified sector is played back. This information recording and reproducing apparatus is characterized in that it reproduces data originally recorded in an alternative sector.

According to the above-described structure, the present invention calculates the number of recording times by comparing the recording number information that stores the number of times data is recorded in a sector with the limit number information that stores the limit number of times data can be recorded. It is now possible to determine whether the limit number of times has been reached and automatically switch between recording and reproducing data in a designated sector and recording and reproducing data in one alternative sector. Errors in data recording and reproduction due to fatigue of the information recording medium can be reduced.

Embodiment FIG. 1 is a block diagram of an information recording/reproducing apparatus according to an embodiment of the present invention. In FIG. 1, address reading means 104 is means for reading an address from a sector identification part reproduction signal 117 that reproduces a sector identification part (having an address and a sector data identification flag) in a sector; The read reproduction address signal, 130 is a limit number storage section storing information 131 on the limit number of times data is recorded in a sector, and the recording number comparison means 106, like the address reading means 104, receives the sector identification section reproduction signal 117. 120 is a recording number comparison signal outputted by the recording number comparing means 106, and address comparison means for comparing the number of recording times information read from the number of recordings with the limit number of times information 131 to determine whether or not the number of recordings exceeds the limit number of times. Means 103 compares the input target address signal 123 and reproduction address signal 118 to determine whether they match; 119 is address comparison means 103;
The control means 100 receives the input write signal 110 from the address match signal indicating the match of the addresses outputted by the controller 100.
Alternatively, the read signal 111 is used as a recording/reproduction request instruction signal, and the reproduction request signal 115 is output to the data reproduction means 101 based on the recording number comparison signal 120 of the sector where the address match signal 119 is output. A reproduced data signal 113 is generated from the reproduced sector signal 116, and on the other hand,
A recording request signal 114 is output to the data recording means 102, and a recording number update request signal 1 is output to the recording number updating means 106.
21, the data reproducing means 101 instructs the laser drive 107 to reproduce data in response to a reproduction request signal 115 from the control means 1oo, outputs the reproduction result as a reproduction sector signal 116, and sends each data to the laser drive 107. The data recording means 102, which is a means for instructing reproduction of the sector identification part of a sector and outputting the reproduction result as a sector identification part reproduction signal 117, inputs external input data to the laser drive 107 in response to a recording request signal 116 from the control means 10o. Means for instructing recording of a certain recording data signal 112.

The recording number updating means 122 updates the laser drive 107 according to the recording number updating request signal 121 from the control means 1oO.
The laser drive 107 is a means for instructing the data reproducing means 1o1. to update the number of recordings. Data recording means 1
This is a laser drive that drives the semiconductor laser 108 based on instructions from 02 and the recording number updating means 106.

Reference numeral 109 denotes an information recording medium to which the laser beam from the semiconductor laser 108 is irradiated.

FIG. 2 is an explanatory diagram of a specific embodiment of the recording number information TIME of the sector identification section of the optical disc in the embodiment. In the sector identification section, PR is a preamble for clock recovery, an address mark indicating the start of AMid address information, ADH is an address, CRC is an error detection code such as a cyclic code, PO is a postamble, and TIM
E is recording number information that stores the number of times data has been recorded in the data section; Go, G1. G2 is a gap in which no information is recorded to absorb rotational fluctuations of the disk.

Regarding the information recording and reproducing apparatus of this embodiment configured as described above in FIG. explain.

First, the data reproducing means 101 identifies the sector identification section II) of each sector on the optical disc (information recording medium 109).
is read by a laser beam, and the sector identification part reproduction signal 1
17 is analyzed by the address reading means 104, and a reproduced address signal 118 is output to the address comparing means 103. The address comparing means 103 compares the target address signal 123, which is an external input, with the reproduced address signal 118, and if they match, the address matching signal 119 is sent to the control means 1.
Output to 00. Further, the recording number comparison means 105 reads the recording number information TIME from the sector identification unit reproduction signal 117 and compares it with the limit number information 131 stored in the limit number storage unit 130 to limit the number of times data is written in the sector. It is determined whether or not it exceeds the number of recording times, and outputted as a recording number comparison signal 120 to the control means 1oo. These address match signal 114 and recording number comparison signal 1
20, and a write signal 1 which is an external request instruction signal.
10 and the read signal 111, the control means 100
Data is recorded and reproduced on the information recording medium 109.

When a data recording request is made, the control means 100 determines whether the number of writes in the data section is less than the limit number of times based on the recording number comparison signal 120 of the target sector outputted by the recording number comparison means 105. If so, record request signal 1
14 to the data recording means 102, and record request signal 1
14, the data recording means 102 records the record data signal 112, which is the input data, as it is in the data section immediately after reproducing the sector identification section. Next, a recording number update request signal 121 is outputted to the recording number updating means 106,
The recording number updating means 106 updates the recording number information in the sector identification section. Further, when the number of writes in the data section has reached the limit number of times, the control means 100 outputs a recording request signal 114 to the data recording means 102 to write data in an alternative sector, and the data recording means 10
2 writes the address information of the alternative sector in place of the recording data in the data section, and writes the recording data signal 112 in the data section of the alternative sector. Next, the recording number update request signal 121 is output to the recording number updating means 106, and the recording number updating means 106 updates the recording number information in the sector identification section. Thereafter, if the number of recordings is equal to the limit number of times, the control means 100 causes the data reproducing means 1 to read out the address information of the alternative sector recorded in the data area of the designated sector.
A recording request signal 114 is sent to the data recording means 102 to write the data in the data section of the alternative sector indicated by the obtained reproduction sector signal 116.
The data recording means 102 writes the recording data signal 112 in the data portion of the alternative sector. Next, output the recording number update request signal 121 to the recording number updating means 106,
The recording number updating means 1oθ updates the recording number information of the alternative sector.

When a data reproduction request is made, the control means 100 determines, based on the target sector recording number comparison signal 120 outputted by the recording number comparison means 105, that if the number of times the data section has been written is less than the limited number of times.

Immediately, a reproduction request signal 116 requesting reproduction of the data portion of the target sector is output to the data reproducing means 101, and the data reproducing means 1o1 reproduces the data portion of the target sector.

As a result, the control means 10o receives and takes out the reproduction sector signal 116 from the data reproduction means 101, and the reproduction data signal 11
Generate 3.

Further, when the number of writes in the data section reaches the limit number of times and tails, a reproduction request signal 115 is output to the data reproducing means 101 to request reproduction of the address information of the alternative sector written in the data section of the target sector. , the data reproducing means 1o1 reproduces the address information of the alternative sector recorded in the data portion of the target sector. Control means 1
oo receives and receives a reproduction sector signal 116, which is the address information of the alternative sector, from the data reproduction means 101, and again sends a reproduction request signal 115 requesting the data reproduction means 101 to reproduce the data of the alternative sector, and the data reproduction means 101 The control means 100 reproduces the data of the alternative sector and outputs a reproduced sector signal 11θ.

The control means 100 generates a reproduced data signal 113 based on the received reproduced sector signal 116.

The data reproduction means 101 receives the reproduction request signal 1115 from the control means 100, instructs the laser drive 107 to reproduce data, and transmits the reproduction result to the reproduction sector signal 1.
Output as 16. It also instructs the laser drive 107 to reproduce the sector identification section of each sector, and outputs a sector identification section reproduction signal 117. The data recording means 102 also instructs the printer drive 107 to record a recording data signal 112, which is input data from the outside, in response to a recording request signal 114 from the control means 103.

The laser drive 107 is the data reproducing means 101 described above.
According to data recording and reproduction instructions from the data recording means 102, the semiconductor laser 108 is driven with reproduction power output or recording power output. The semiconductor laser 108 reproduces the data portion in the sector of the information recording medium 109 irradiated with the laser beam, and also performs recording to the data portion. Furthermore, the sector identification part ID of each sector
is also read using the semiconductor laser 10B, and its sector identification section reproduction signal 117 is output. Furthermore, the recording number information TIMIK of the sector identification section is also updated.

As described above, in this embodiment, when recording data, the number of recording times of data recorded in a designated sector is compared with the limit number of times in the limit number information section, and if the limit number of times has been reached, the data is recorded. Instead of recording data in the data area of the sector, address information of the alternative sector is directly recorded, data is written in the data area of the alternative sector, and when playing back, if the sector has reached the limit number of times, the device Since the control means automatically reads out the data recorded in the alternative sector, even if the information recording medium is a removable optical disk, excessive storage of the information recording medium can be avoided without the user being aware that the medium has been replaced. Data recording errors due to fatigue can be prevented.

As described in detail, according to the present invention, it is possible to limit the number of times data is recorded on an information recording medium, thereby preventing errors in recording and reproducing data due to excessive fatigue of the information recording medium. Can be done. This is particularly effective for information recording and reproducing apparatuses that use rewritable information recording media such as optical discs, whose recording characteristics deteriorate as the number of times data is recorded increases. In addition, data recording and reproduction processing in an alternative sector that replaces the target sector that has reached the limit number of times is automatically performed within the device by writing the address information of the alternative sector directly into the data section of the target sector. It will be held in Therefore, it becomes possible to use the information recording medium without being aware of the existence of alternative sectors, which has a great practical effect.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention;
FIG. 2 is an explanatory diagram of the sector format of the optical disc in the embodiment of FIG. 1, FIG. 3 is a block diagram of a conventional device, and FIG. 4 is an explanatory diagram of the sector format of the optical disc in the conventional example. 100...control means, 101...data reproduction means. 102... Data recording means, 103...
・Address comparison means, 1o4... Address reading means, 106... Recording number comparison means, 10
6...Means for updating the number of records. 107... Laser drive, 108...
・Semiconductor laser, 109... Information recording medium, 1
10...Write signal, 111...Read signal, 112...Record data signal, 11
3...Reproduction data signal, 114...Record request signal, 116...Reproduction request signal, 116
...Reproduction sector signal, 11 completion...Sector identification section reproduction signal, 118...Reproduction address signal, 119...Address match signal, 120...
... Recording number comparison signal, 121... Recording number update request signal, 122... Target address signal, 130... Limit number storage section, 131...
・・Limited number of times information, PR・・Preamble, A
M...address mark, ADR...address. CRC...Error detection code, PO...
Postamble, Go, G1. G2...gap, TZMIC...recording number information.

Claims (1)

[Claims] All tracks are formed using a rewritable recording member, each track is composed of a sector having a sector identification part and a data part, and the sector identification part stores sector address information and the number of times data is recorded in the sector. an information recording medium that has recording number information that is updated every time recording is performed, and has a data area in which data is recorded in the data section, and stores a limit number of times that data can be recorded in a sector of the information recording medium. a limited number of times storage unit to read out sector address information from the sector identification unit; and address comparison unit to compare the sector address information of the sector identification unit and a target sector address;
recording number comparison means for reading recording number information from the sector identification section and comparing it with limit number information stored in the limit number storage section; data recording means for recording data in the data section; a data reproducing means for reproducing data; a recording number updating means for updating the recording number information; and a control means for controlling recording/reproduction to the data section; Based on the comparison information obtained by comparing the number of times of control and the number of times of control, in the case of data recording, if the number of times of recording of the sector is less than the number of times of control -1, data is recorded in the data area of the sector. If the number of recordings in the sector reaches the limit number -1, address information of an alternative sector in which data is to be recorded instead of the target sector is recorded in the data area of the sector, and from then on, the alternative sector is recorded in the data area of the sector. Record data in the data area of the sector,
In the case of data reproduction, if the number of recordings in the sector is less than the limited number of times, the data recorded in the data area of the sector is played back, and if the number of recordings in the sector has reached the limited number of times, the data recorded in the sector is reproduced. An information recording/reproducing apparatus characterized in that data recorded in a data area of an alternative sector is reproduced based on address information of the alternative sector recorded in the data area.