JPH01144274A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a data error from being generated at the time of recording and reproduction by performing the recording of data on the data area of a substitute sector when the number of times of recording of a sector arrives at the number of times of limitation based on comparison information obtained by comparing recording frequency information with limitation frequency information by a recording frequency comparison means. CONSTITUTION:The recording frequency comparison means 105 reads out the limitation frequency information and the recording frequency information from a sector identification part reproducing signal 117, and compares them, and decides whether or not the limitation of the number of times possible to write the data on the sector is applied. And when the number of times of write of a data part arrives at the number of times of -1 of the number of times of limitation, a control means 100 outputs a recording request signal 114 to a data recording means 102 so as to write the data on the substitute sector, and the data recording means 102 writes the address information of the substitute sector on the data part instead of recording data, and writes a recording data signal 112 on the data part of the substitute sector. In such a way, it is possible to prevent the error in the recording and the reproduction of the data due to the excessive 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 300 is a control means, 301 is a data reproducing means, 302 is a data recording means, 303 is an address comparison means, 304 is an address reading means, 305 is a laser drive, and 306 is a data recording means. is a semiconductor laser.

307 is an information recording medium, 311 is a reproduction data signal, 31
5 (d sector identification section reproduction signal, 316 is reproduction address signal, 317 is address match signal, 318 is target address signal, 308 is write signal, 309 is read signal, 3
10 is a recording data signal - 314 is a reproduction sector signal, 31
3 is a reproduction request signal, and 312 is a recording request signal. Fourth
The figure 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 on the same sector of a rewritable information recording medium, fatigue of the information recording medium may occur during recording/playback. It was difficult to prevent data errors from occurring.

In view of this, the present invention provides an information recording and reproducing apparatus that can reduce data errors caused by fatigue of a rewritable information recording medium by providing recording number information that stores the number of times data has been recorded in each sector. The purpose is to provide.

Means for Solving the Problems The present invention provides a sector identification section in a sector with limit number information storing a limit number of times data can be recorded in the sector;
For an information recording medium that stores the number of times data has been recorded and has added recording number information that is updated every time data is recorded, the number of recording times that reads the limit number information and recording number information from the sector identification section and compares it. a comparison means, an address reading means for reading sector address information from the sector identification section, an address comparison means for comparing the sector address information of the sector identification section and a target sector address, and a data recording means for recording in the data section; The apparatus includes a data reproducing means for reproducing the data part, a recording number updating means for updating the recording number information, and a control means for controlling recording and reproduction to the data part.

Based on the comparison information obtained by comparing the recording number information and the limited number of times information by the recording number comparing means, if the number of recordings of the sector has reached the limited number of times, data is recorded in υ instead of the target sector. This information recording and reproducing apparatus is characterized in that data is recorded in a data area of an alternative sector.

Effect of the Invention With the above-described configuration, the present invention has limit number information that stores the limit number of times data can be recorded, and recording number information that stores the number of times data can be recorded, which are stored in the sector identification section of each sector. By reading and comparing, it is possible to determine whether the number of recordings has reached the limit for each sector. 9. It is possible to set a limit number of times of recording.9- It is possible to reduce errors in data recording and reproduction due to fatigue of the information recording medium.

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 section reproduction signal 117 that reproduces a sector identification section (having an address and a sector data identification flag) in a sector; Similarly to the address reading means 104, the reproduction address signal read out by the reproduction address signal and the recording number comparison means 106 are means for comparing the limit number information read from the sector identification section reproduction signal 117 and the recording number information. The recording number comparison signal outputted by the recording number comparison means 105, and the address comparison means 103, the input target address signal 123 and the reproduction address signal 118.
119 is an address match signal indicating that the addresses outputted by the address comparison means 103 match, and control means 1o○ is an input write signal 110 or read signal. 111 as a recording/playback request instruction signal, address matching signal 119
Based on the recording number comparison signal 120 of the sector that has been output, a reproduction request signal 116 is output to the data reproduction means 1o1, a reproduction data signal 113 is generated from the obtained reproduction sector signal 116, and on the other hand, the data recording means The data reproducing means 101 outputs the recording request signal 114 to the recording number updating means 102 and the recording number updating request signal 121 to the recording number updating means 106.
5 instructs the laser drive 107 to reproduce data and outputs the reproduction result as a reproduced sector signal 116, and instructs the laser drive 10 to reproduce the sector identification part of each sector and reproduces the reproduction result in the sector identification part. Means for outputting as signal 117, data recording means 102
means for instructing the laser drive 107 to record the recording data signal 112, which is input data from the outside, in response to a recording request signal 115 from the control means 100; Means for instructing the laser drive 107 to update the number of recordings by the request signal 121; the laser drive 107;
is a laser drive that drives the semiconductor laser 108 based on instructions from the data reproducing means 101, the data recording means 102, and the recording number updating means 106.

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

FIG. 2 shows control number information LIMIT and recording number information TIM of the sector identification section of the optical disc in the second embodiment.
6 is an explanatory diagram of a specific example of E. In the sector identification section, PR is a preamble for clock recovery, 5M is an address mark indicating the start of address information, and DR is an address.

CUE is an error detection code such as a cyclic code, PO is a postamble, LIMIT is limit number information that stores the limit number of times data can be recorded in the data section, and TIME stores the number of times data can be recorded in the data section. Recording number information, Go, G1. G2 and G3 are gaps in which no information is recorded to absorb rotational fluctuations of the disk.

The operation of the information recording/reproducing device of this embodiment configured as described above in FIG. 1 will be explained below using an example of an information storage medium applied to the device of this embodiment (FIG. 2). do.

First, the sector identification part ID of each sector on an optical disc (information storage medium 109) is read by the data reproducing means 101 with a laser beam, and the sector identification part reproduction signal 11 is read by the data reproducing means 101.
7 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, and the reproduced address signal 118,
If they match, the address match signal 119 is sent to the control means 10.
Output to 0. Further, the recording number comparing means 106 reads out the limit number information LIMIT and the recording number information TIME from the sector identification section reproduction signal 117 and compares them to determine whether or not the number of times data can be written in the sector exceeds the limit. Then, it is outputted to the control means 100 as a recording number comparison signal 120. The control means 100 records and reproduces data on the information storage medium 109 based on the address match signal 114, the recording number comparison signal 120, and the write signal 110 and read signal 111, which are request instruction signals from the outside.

When a data recording request is made, the control means 100 determines that the number of times the data section has been written is 11 times the limit number based on the target sector recording number comparison signal 120 outputted by the recording number comparison means 105. If it is less than that, 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, output the recording number update request signal 121 to the recording number updating means 108,
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 IQ6, 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.
01, and a recording request signal 114 is sent to the data recording means 102 to write 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, the recording number update request signal 121 is output to the recording number updating means ff06, and the recording number updating means 106 updates the recording number information of the alternative sector.

When a data playback request is made, the control means 100 immediately determines, based on the recording number comparison signal 120 of the target sector outputted by the recording number comparison means 105, that if the number of writes in the data section is less than the limited number of times, 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 101 reproduces the data portion of the target sector. As a result, the control means 10
0 receives and receives the reproduced sector signal 116 from the data reproducing means 101 and generates the reproduced data signal 113.

In addition, when the number of writes in the data section has reached the limit number, a reproduction request signal 115 is output to the data reproducing means 101 in order to request reproduction of the address information of the alternative sector written in the data section of the target sector. However, the data reproducing means 101 reproduces the address information of the alternative sector recorded in the data portion of the target sector. Control means 1
00 receives and receives the reproduction sector signal 116, which is the address information of the alternative sector, from the data reproduction means 1o1, and again sends the reproduction request signal 115 requesting the data reproduction means 101 to reproduce the data of the alternative sector. Means 10
1 outputs to the control means 100 a reproduced sector signal 116 in which data of the alternative sector is reproduced. The control means 100 generates a reproduced data signal 1 based on the received reproduced sector signal 116.
Generate 13.

The data reproduction means 101 receives the reproduction request signal 115 from the control means 100, instructs the laser drive 107 to reproduce the data, and transmits the reproduction result to the reproduction sector signal 11.
Output as 6. It also instructs the laser drive IQ7 to reproduce the sector identification section of each sector, and outputs a sector identification section reproduction signal 117. The data recording means 102 also includes
By the recording request signal 114 from the control means 103,
An instruction is given to the laser drive 107 to record a record data signal 112 which is input data from the outside.

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

As described above, in this embodiment, the limit number information recorded for each sector is compared with the data recording number information, and when data is to be recorded, if the number of recordings has reached the limit number, the data is recorded. Data is written in an alternative sector instead of the other sector, and in the case of playback, the control means of the device automatically reads out the data recorded in the alternative sector, thereby improving the recording characteristics of data by sector like an optical disc. Even for information recording media with different data recording frequencies, it is possible to set an optimal limit for each sector. Data recording errors due to fatigue can be prevented.

As described in detail, according to the present invention, it is possible to set a limit on the number of times for each sector of an information recording medium consisting of a plurality of sectors, thereby preventing excessive fatigue of the information recording medium. It is possible to prevent data recording/reproduction errors due to In particular, in information recording media such as optical discs that are composed of multiple rewritable sectors, the data recording characteristics and data recording frequency differ depending on the sector, and the recording characteristics deteriorate as the number of data recording increases. This is very effective for information recording and reproducing devices that use such media. 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. .

Therefore, it becomes possible to use the information recording medium without being aware of the existence of one alternative sector, 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 mounting in the conventional example, and FIG. 4 is an explanatory diagram of the sector format of the optical disc in the conventional example. 100... Control means, 101... Data reproducing means, 102... Data recording means, 10
3...Address comparison means, 104...
Address reading means, 105...recording number comparison means, 106...recording number updating means, 10γ
...Laser drive, 10B...Semiconductor laser, 109...Information recording medium, 110.
...Write signal, 111...Read signal, 112...Record data signal, 113...
...Reproduction data signal, 114...Record request signal, 115...Reproduction request signal, 116...
... Reproduction sector signal, 117 ... Sector identification section reproduction signal -118 ... Reproduction address signal, 1
19... Address match signal, 120...
- Recording number comparison signal, 121...Recording number update request signal -122...Target address signal, PR
...Preamble, AM...Address mark, ADR...Address, CRC/output...
Error detection code, PO...postamble, G
o, G1, G2゜G3...Gap, LIM
IT...Limited number of times information, TIME...
Recording count 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 a limit number of times data can be recorded in the sector. an information record that stores information on the limited number of times data is recorded and the number of times data is recorded in a sector and is updated each time recording is performed, and has a data area in which data is recorded in the data section. a medium; an address reading means for reading sector address information from the sector identification section;
address comparison means for comparing sector address information of the sector identification section with a target sector address; recording number comparison means for reading and comparing limit number information and recording number information from the sector identification section; a data recording means for performing recording; a data reproducing means for reproducing data in the data section; a recording number updating means for updating the recording number information;
The controller further comprises a control means for controlling reproduction, and determines whether the number of recordings of the sector has reached the limit number based on comparison information obtained by comparing the recording number information and the limit number information by the recording number comparing means. For example, an information recording and reproducing apparatus is characterized in that data is recorded in a data area of an alternative sector instead of a target sector.