JPH01122080A - Recording/reproducing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a recording/reproducing device used in an optical disk device or the like that drives a disk.

2. Description of the Related Art In general, a recording medium such as an optical disk has a recording area composed of a spiral or concentric track, and this track is divided into a plurality of sectors in the radial direction.

Furthermore, since the recording film of recording media such as optical disks is not uniform due to manufacturing defects or handling during use, a recording/reproducing device records data in a user data area and then reproduces this data. If a predetermined number of errors or more (replacement criteria) occur, the same data is recorded again in a replacement sector or track that serves as a backup recording area (replacement process), so that the recorded data can be played back correctly at a later date. Make it.

In other words, the replacement standard is a standard that sets the limit at which recorded data cannot be reproduced correctly depending on the type and quality of the recording medium.

FIG. 5(a) shows an optical disc l of relatively good quality, and FIG. 5(b) shows an optical disc 2 of relatively poor quality. An area replacement sector group IB is set, and a relatively large area replacement sector group 2B is set in advance for the optical disc 2 of relatively poor quality.

When recording data on an optical disc 1 of relatively good quality, an optical disc device (recording/playback device) that has been preset with a relatively low replacement standard and a program with a small number of replacement sectors first records a group of user sectors on the optical disc 1. If the recorded data is recorded in the free area of IA and more errors occur than this replacement standard when reproducing this recorded data, the same data is recorded again in the free area of replacement sector group IB based on a small number of replacement sectors. do.

On the other hand, when recording data on an optical disc 2 of relatively poor quality, an optical disc device (recording/playback device) that is preset with a relatively high replacement standard and a program with a large number of replacement sectors first records data on the optical disc 2. If the recorded data is recorded in the free area of 2 user sector groups and more errors than the replacement standard occur when reproducing this recorded data, the data is recorded again in the free area of the replacement sector group 2B based on the large number of replacement sectors. Write the same data.

That is, each recording/reproducing device has an optical disc 1.
The number of replacement sectors is set in advance according to the quality of each of 2, and based on the number of replacement sectors, the replacement sector groups IB,
It is determined whether or not to record data in 2B, and replacement processing is performed so that the recorded data can be correctly reproduced at a later date.

Problems to be Solved by the Invention However, in the conventional recording and reproducing apparatus described above, the problem as shown in FIG.
As shown in FIG. 5(a), an apparatus for recording and reproducing data on an optical disc 2 of relatively poor quality can later correctly reproduce data on an optical disc 1 of relatively good quality, as shown in FIG. 5(a). Optical disc 1 with relatively good quality as shown in
A device for recording and reproducing data has a problem in that the data on the optical disc 2, which is relatively poor in quality, cannot be correctly reproduced at a later date.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a versatile recording and reproducing apparatus that can correctly reproduce recorded data regardless of the type and quality of the recording medium.

Means for Solving the Problems In order to solve the above problems, the present invention records the number of sectors in the replacement sector area in advance on a recording medium, and when data is recorded and reproduced in the user data area, this recording is performed. The same data is recorded in a spare sector area of a recording medium based on the number of spare sectors recorded on the medium.

Effects of the present invention In order to pre-record on the recording medium the number of sectors of the replacement sector area according to the type of recording medium and the quality of the recording film, the recording/reproducing device performs data replacement processing using the number of replacement sectors. Therefore, it is possible to realize a versatile recording and reproducing apparatus that can correctly reproduce recorded data regardless of the type and quality of the recording medium.

Example Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic block diagram showing one embodiment of a recording/reproducing apparatus according to the present invention, FIG. 2 is an explanatory diagram of an optical disc on which data is recorded and reproduced by the recording/reproducing apparatus of FIG. 1, and FIG.
FIG. 4 is an explanatory diagram of other optical discs of different quality, and FIG. 4 is an explanatory diagram of system data recorded on the optical discs of FIGS. 2 and 3.

In FIG. 1, 11 is an input unit for inputting data and various commands to be recorded on the optical disc 20;
A display section for displaying playback data from the optical disc 20, various commands manually inputted via the input section 11, results processed by the CPU 13, etc.; 13 is a CPU (central processing unit) that performs operations to be described later; 14; is R1 (read-only memory) in which the execution program of CPU13 is stored,
15, data to be recorded on the optical disc 20;
This is a memory (random access memory) in which data reproduced from the optical disc 20 and control information including the number of alternating cycles, which will be described later, are stored.

16 is a head for writing data, control information, etc. on the optical disk 20; and a head for reading the written data, control information, etc.; 2
This is a recording/reproducing mechanism that has a mechanism for rotating the 0.

In FIG. 2, the optical disc 20 has a recording area consisting of a spiral or concentric track, and this track is divided into eight sectors in the radial direction of the cylindrical optical disc 200 in the drawing, and each track and sector has an address. has been granted.

Note that the number of sectors generally varies depending on the diameter of the optical disc, and in the case of an optical disc with a diameter of 130 mm, 17 sectors are set.

In FIG. 2, the eight sectors of the optical disc 20 are:
It has a user sector group 20A consisting of seven sectors in which data etc. are recorded by the user, and a replacement sector group 20B consisting of one sector which becomes a spare recording area if there is a defect in the area of the user sector group 20A, Further, the outer track group is set as a system track group 21 in which various control information of the recording/reproducing device is written.

FIG. 3 shows another optical disc 30 whose quality is worse than that of the optical disc 20. This optical disc 30 has a replacement sector group 30B consisting of two sectors and a user sector group 30A consisting of six sectors. It has a system track group 31 of area size and position.

That is, the number of sectors in the user sector groups 20A and 30A and the number of sectors in the replacement sector groups 20B and 30B are set in advance according to the quality of the optical disc 20.30, and the number and position of the system track group 21.31 are determined in accordance with the optical disc 20.30.
It is constant regardless of the quality of 30.

FIG. 4 shows the recorded contents of one sector 21a, 31a of this system track group 21.31, which consists of a system data identifier consisting of 16 bytes, system data consisting of 8 bytes, and 1 byte. The data includes the number of sectors in the replacement sector groups 20B and 30B to be replaced and other control information, and these data are preformatted onto the optical disks 20 and 30.

Next, the operation of the embodiment according to the above configuration will be described with reference to the optical disc 20.
The case where data etc. are recorded in will be explained.

When the optical disc 20 is set, the CPU 13 drives the recording/reproducing mechanism 16, takes in control information of the system track group 21 of the optical disc 20 as shown in FIG. 4, and stores it in the RAM 15.

Next, the CPU 13 stores the recording data and its control information input from the input section 11 in the RAM 15, and records them in the empty area of the user sector group 20A of the optical disc 20 by driving the recording/reproducing mechanism 16.

After this recording is completed, the CPU 13 reproduces the recorded data by driving the recording/reproducing mechanism 16, stores it in ~W15, and determines whether or not it is correct (verification process).

If there are no more than a predetermined number of errors in the reproduced data, the recording process ends; on the other hand, if there are more than a predetermined number of errors (= indicates the replacement sector group from which the input data stored in ~W15 was first read). Based on the number of sectors of 20, two vacant areas of the replacement sector group 20B of the optical disc 20 are recorded.

Note that when data is recorded in the replacement sector group 20B, the address (replacement source address) of the user sector group 20A that was first (2) recorded is stored in the replacement sector group 20B together with the data.
The data recorded in B and also in the replacement sector group 20B (even if there are two, verify processing is performed, and if there are more than a predetermined number of errors, the same data is re-recorded in the replacement sector group 20B)
Record in an empty area.

Therefore, according to the above embodiment, the replacement sector group 20B is recorded in advance in the system track group 21a of the optical disk 20 depending on the type of the optical disk 20 and the quality of the recording film.
Since the number of sectors is read and replacement processing is performed based on the read number of sectors, recorded data can be correctly reproduced at a later date regardless of the quality of the optical disc 20 or the like.

In addition, even if the quality of optical discs improves due to advances in materials and manufacturing technology, by recording the number of sectors in the replacement sector group on each optical disc in advance according to the quality, the recording/playback device can read this number of sectors. It is possible to perform replacement processing for each optical disc of different quality.

DETAILED DESCRIPTION OF THE INVENTION As described in detail, the present invention records the number of sectors in a replacement sector area in advance on a recording medium, and when data is recorded and reproduced in a user data area, the number of sectors in the replacement sector recorded on this recording medium is Since the same data is recorded in alternate sector areas of the recording medium based on the number of recording media, it is possible to create a versatile recording and reproducing device that can correctly reproduce recorded data regardless of the type and quality of the recording medium. It can be realized.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing one embodiment of a recording/reproducing apparatus according to the present invention, FIG. 2 is an explanatory diagram of an optical disc on which data is recorded and reproduced by the recording/reproducing apparatus of FIG. 1, and FIG.
4 is an explanatory diagram of another optical disc, FIG. 4 is an explanatory diagram of system data recorded on the optical discs of FIGS. 2 and 3, and FIGS. FIG. 2 is an explanatory diagram of an optical disc on which data is recorded and reproduced by a recording/reproducing device. 13... CPU (central processing unit), 14... RO
M (read only memory), 15...RAM (random access memory), 16...recording/reproduction mechanism, 20.
30・Optical disk, 20A, 3OA...user sector group, 20B. 30B...Replacement sector group, 21.31...System track group, 21a, 31a...Sector for replacement sector number data. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 12 Figure 41iii! I

Claims (1)

[Claims] A user sector area in which data is recorded, a replacement sector area in which the same data is recorded if the data recorded in this user data area is not reproduced correctly, and an area in which the number of sectors in this replacement sector area is recorded in advance. a recording and reproducing means for recording data on a recording medium having a recording medium and reproducing the recorded data; and when recording data on the recording medium, reading the number of sectors in the replacement sector area and after recording the data in the user sector area; A recording/reproducing device comprising means for reproducing this data and controlling the recording/reproducing means so as to record the same data in a replacement sector area based on the number of sectors when the data is not reproduced correctly.