JPS6228978A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To reduce a load on a reproducing device by re-recording information only when the error rate of a medium is exceeded over a prescribed reference. CONSTITUTION:A driving device reads a data when each information is recorded from a management area and picks up the information over a prescribed time elapsed. And the picked up information is reproduced and is error-corrected at an error correction circuit 3 and the information after error-corrected is accumulated at a buffer memory 2. And a medium error rate at every sector is sent to a CPU1. At the CPU1, when the medium error rate of the information picked up is exceeded over a prescribed reference value, the information is recorded on the same sector from which the information is picked up. And the information re-recorded is reproduced again and is compared with the information stored at the memory 2, confirming that the error is eliminated, and after that the medium error rate of the recorded information is surveyed. After the above operation is repeated by several times, the medium error rate is still exceeded over the reference value, then the sector is rejected and the above information is recorded on an another new sector.

Description

[Detailed description of the invention] [Fields of use of #work] The present invention relates to an information recording/reproducing device.

[Prior Art] In an information recording/reproducing device, care must be taken in preserving information recorded on an information recording medium. For example, in order to prevent the deterioration of recorded information caused by aging of the information recording medium, information that has passed a predetermined number of years is re-recorded in the same area or in another area.

Incidentally, the aging of the information recording medium varies depending on the position of the information recording medium l2. For this reason, if an attempt is made to re-record all of the information that has passed a predetermined number of years, the burden on the information recording and reproducing device becomes heavy, and the information recording area of the information recording medium cannot be used effectively. There's a problem.

[Object of the Invention] The present invention has been made by focusing on the problems in the prior art described in -1-, and aims to reduce the burden on an information recording/reproducing device and effectively use the information recording area of an information recording medium. The object of the present invention is to provide an information recording/reproducing device that can perform the following functions.

[Embodiments of the Invention] Information recording and reproducing devices using disks as media include magnetic disk devices, optical disk devices, magneto-optical disk devices, etc. In the following explanation, a magneto-optical disk will be used as an example. do.

FIG. 2 is an explanatory diagram of a magneto-optical disk.

The magneto-optical disk D has a sector structure, and each sector is divided into an address a and a data section, and each sector is divided into concentric circles.
are located along the guide track. In FIG. 2, management area A is an area where management information is recorded.

FIG. 1 is a block diagram showing one embodiment of the present invention,
1 is a diagram showing the configuration of a magneto-optical disk drive device.

The CPUI controls the entire magneto-optical disk drive device. Also, a panzer memory 2, an error correction circuit (ECC) 3, a digital modulation circuit 4, a laser drive circuit 5, a head 6, an actuator 7 for moving the head 6, a linear motor 8, and an encoder 9. is provided. Also, a head amplifier 10 that amplifies the playback signal
and a waveform shaping circuit 11 that shapes the waveform of this amplified signal.
A digital demodulation circuit 12 that digitally demodulates the waveform-shaped signal, and an address (1 raw circuit 1) that reproduces address information.
3, a management information memory 14, a sector recording/reproducing circuit 15 for reproducing sector recording signals, and an interface 16.

In addition, in addition to the above, a bias magnet 17 and a timer 18 are provided.
and a spindle motor 19 are provided.

Next, the operation of the embodiment 1- will be explained.

First, a case in which predetermined information is recorded on the magneto-optical disk D will be described.

In the management area A, the timer 18, CPU 1, management information memory 14, etc.
The predetermined information is recorded in the information area B. When recording information, the information must be
Error correction encoding is performed by the F circuit 3, modulated by the digital modulation circuit 4, and recorded on the magnetic disk D via the laser drive circuit 5.

Next, the recorded information checking operation will be explained.

The drive device reads the number 11 in which each piece of information is recorded from the management area A at predetermined intervals and compares it with the current date. Then, the information that has passed a predetermined period of time is picked up from the recorded [1]. The picked up information is then reproduced and error corrected in the error correction circuit 3, and the error corrected information is stored in the buffer memory 2.
is stored in The medium error rate for each sector is then sent to the CPUI.

The CPU determines whether the medium error rate for the picked up information is less than a predetermined reference value, and if it is less than the reference value, the information checking operation is completed. Therefore, if the medium error rate is small, information will not be re-recorded.

On the other hand, if the medium error rate for the picked up information is a predetermined reference value amount -L, then the information is
Record in the same sector as the picked sector. Then, the recorded information is reproduced again and compared with the information stored in the buffer memory 2 to confirm that there are no errors, and then the medium error rate of the recorded information is checked. If this medium error rate is within a predetermined reference value, the check operation is completed, and if the medium error rate is within a certain reference value, the above operation (i.e., recording, playback, information error rate inspection) is completed. ) again.

1. Repeat the above operation several times, and if the medium error rate does not fall below the reference value during or at the end, discard the currently recorded sector. And into new sectors.”
-Write the information. In this case, it is specified in management area A that the sector has been replaced.

1- Repeat the series of operations until the medium error rate falls below the reference value.

An example of the above reference value will be explained next.

C1 & C2 Riet-Solomon cross interleave (C1
: 1 stack, C2: 2 ton), errors are classified as 0 balls (no error), 1 stack, 2 stacks, and 3 stacks 1-. Weights from 0 weight to 2 weight are completely corrected, but if an error occurs at 3 weight, it becomes a problem.

In other words, if a triple placement 1- error occurs, most of the error will be detected, but some of the errors will be detected as 0-fold...
Errors such as double errors are corrected. In particular, the probability that the error will be corrected as a double error is 0, which is higher than the probability that the error will be corrected as a single error. Therefore, when a double error or triple error or more is recognized as 1- in the change at the time of writing, it is detected as being less than the threshold and checked for re-recording.

When checking during playback, if CI recognizes an error of 2 ton or more, a flag is set, and if C2 recognizes a double error, it is determined whether the error is corrected or not based on the flag in C1. .

Further, the detection of the medium error rate is performed for each track, and if the medium error rate is equal to or higher than a predetermined reference value,
Record it in the same trunk and play back the recorded contents,
The medium error rate of the recorded information is checked, and if the medium error rate is within a predetermined standard, the checking operation is completed. If the medium error rate is within the predetermined standard, the operation described in section 2 is repeated again.

It should be noted that re-recording in the same area is done in the case of a device in which the recorded information can be erased; in the case of a device that cannot be erased, such as an optical disk, the original information is recorded in a new area.

Furthermore, the recorded information check may not be performed at regular intervals, but may be performed at any time specified by the user. In this case, the sequence after the user specifies it is the same as in item 1-.

In this way, information is re-recorded only when the medium error rate is within a predetermined standard value, and information whose medium error rate is below a predetermined standard value is not re-recorded, so the disc is The capacity of D can be used effectively.

[Effects of the Invention] According to the present invention, it is possible to reduce the burden on the information recording/reproducing device and to effectively use the information recording area of the information recording medium.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is an explanatory diagram of a magneto-optical disk used in Example F. ■...CPU, 290. Buffer memory, 3... Error correction circuit (ECC), 14... Management information memory, 18... Timer, D... Magneto-optical disk.

Claims (2)

[Claims] (1) When a predetermined period of time has elapsed since predetermined information was recorded, the medium error rate in the area where the information is recorded is detected, and when this medium error rate is greater than or equal to a predetermined value, the information in the area is An information recording/reproducing device characterized by re-recording. (2) The information recording and reproducing apparatus according to claim 1, wherein the detection of the medium error rate and the re-recording of the information are performed for each guide track.