JPH09154105A - Disk recording and reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent it that the reliability is deteriorated because a time for rewrite processing is not reserved even when recording data are in error in the case of recording AV data to a disk recording medium. SOLUTION: An error correction code addition section 11 adds an error correction code to each frame of received AV data and the resulting data are recorded on a magneto-optical disk (MO) 41. The recorded data are immediate reproduced and given to an error correction section 23, in which whether or not error correction is properly executed is checked. When the error correction is not properly executed, original recording AV data recorded in a buffer 14 and its data recording address are stored in a memory section 34. When the input of the AV data is stopped, the AV data and the recording addresses having been so far stored in the memory section 24 are recorded on a spare recording area of the MO disk 41. In the case of reproduction, the address having been recorded in the spare recording area is referenced to replace AV data not normal are replaced with correct data sequentially and a series of normal AV data are outputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc recording / reproducing device which is applied to, for example, a video camera device and can appropriately record and reproduce inputted AV data on a disc-shaped recording medium.

[0002]

2. Description of the Related Art A used in television broadcasting stations
As a V data recording device, a VTR device using a VTR tape as a recording medium is mainly used. However, due to recent progress in image compression technology and digital processing technology, a disk recording / reproducing apparatus for recording AV data on a randomly accessible disk-shaped recording medium is being used. In such a disc recording / reproducing apparatus, AV data can be recorded / reproduced at high speed by drastically reducing the redundancy of video data and encoding the AV data with high efficiency. In addition, processing such as high-speed random access or variable speed reproduction is performed by associating data of a unit such as 1 frame or 1 field, which is a unit unique to video data, with 1 track of the disc and rotating the disc at a frame frequency or a field frequency. Makes it easy.

By the way, in order to accurately record AV data in a VTR device, while recording a signal on a VTR tape, the recorded signal is reproduced at the same time to confirm whether or not normal recording is performed. The confit playback is normally performed. Also, in the case of a disk recording / reproducing apparatus, when it has been used as a storage device such as a computer device so far, the data is recorded by the recording head and at the same time the data is reproduced by the reproducing head, and the reproduced data is checked. When there is an abnormality, the operation of re-recording is performed.

[0004]

However, when AV data is recorded on such a disc recording / reproducing apparatus,
The re-recording operation as described above cannot be performed properly, and the reliability of the recorded data is reduced. Even if the AV data is encoded at a high compression rate, its code amount is large, and since it occurs in real time, the recording data becomes a continuous data stream. Therefore, even if the data could not be recorded normally, the time for rewriting the data cannot be secured. Also, as described above, the AV encoded with a high compression rate by eliminating the redundancy.
In data, it is difficult to correct defective data by utilizing the correlation of images, so the generation of such abnormal data becomes a very serious problem. Therefore, there is a strong demand for recording AV data with high reliability.

Therefore, it is an object of the present invention to check the recorded data and rewrite abnormal data with respect to AV data sequentially and continuously input, and to accurately record the AV data. It is to provide a recording / reproducing apparatus.

[0006]

In order to solve the above problems, the recording data is checked in the same manner as before, but the rewriting operation is not immediately performed even if it is detected that the recording is not normally performed. , The recording of currently input AV data is prioritized. Then, the data that has not been normally recorded is separately recorded together with the recording address.

Therefore, the disc recording / reproducing apparatus of the present invention is a disc recording / reproducing apparatus for recording AV data on a recording means having a disc-shaped recording medium, and an error correction code is provided for each predetermined unit of sequentially inputted AV data. Error correction code adding means for adding AV to generate recording AV data, a first recording processing means for recording the recording AV data on a disc-shaped recording medium, and a reproduction for instantly reproducing the recorded AV data. Processing means, error correction means for performing error correction on the reproduced AV data, and if the error correction cannot be performed properly, the original recording AV data and the AV data in the disc-shaped recording medium And a second recording processing means for recording the recording address at which is recorded in some recording part of the recording means.

When the disk-shaped recording medium is a normal disk-shaped recording medium such as a magneto-optical (MO) disk or a magnetic disk, the second recording processing means includes the recording AV data and the recording AV data. The recording address and the recording address are temporarily stored, and the recording AV data and the recording address are recorded in a predetermined preliminary recording area of the disc-shaped recording medium during the time when the input of the AV data is stopped. Is preferred. Further, when the disk-shaped recording medium is a disk cartridge device or the like in which a non-volatile memory means is mounted, the second recording processing means,
It is preferable to record the recording AV data and the recording address in the nonvolatile memory.

Further, the disc recording / reproducing apparatus reproduces the AV data recorded on the disc-shaped recording medium in the reproduction processing means, and associates the recording address of the reproduced AV data with the recording address and the AV data. The comparing means for comparing the recorded address recorded in the recording means with the comparing means and the reproduced AV data if the address of the reproduced AV data by the comparison does not match the recorded address. And output
When the address of the reproduced AV data matches the recorded address, the recorded AV data is provided with a data output unit that outputs the recorded AV data in association with the recorded address. To play.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment A first embodiment of the disc recording / reproducing apparatus of the present invention will be described with reference to FIGS. The disc recording / reproducing device shown in the present embodiment is a device mounted as an AV data recording / reproducing unit in a camera-integrated video recorder device (disc camcorder) for recording AV data on a disc-shaped recording medium. FIG. 1 shows the configuration of the disc recording / reproducing apparatus 1. The disc recording / reproducing apparatus 1 includes an error correction code adding unit 11, an auxiliary signal adding unit 12, a recording signal switching unit 13, a buffer 14, a modulating unit 15, and a recording amplifier 1.
6, servo circuit 17, recording head 18, reproducing head 1
9, reproduction amplifier 20, binary discriminator 21, demodulator 22, error corrector 23, memory 24, output data controller 25,
Rewrite data storage unit 29, output data switching unit 3
0 and the control unit 31.

The disc recording / reproducing apparatus 1 includes a removable cartridge type magneto-optical (MO) disc 41.
Is set, and AV data is recorded and reproduced on this MO disc 41. This MO disc 41
In the disc recording / reproducing apparatus 1, one rotation is performed during one frame period in synchronization with a frame synchronization signal of AV data, and one frame of AV data is recorded on one track. In addition, the user recording area of the MO disc 41 is AV
The recording medium is divided into an AV data recording area for continuously recording data and a preliminary recording area for recording data of tracks for which AV data could not be properly recorded. In addition,
The preliminary recording area is secured on the inner or outer circumference side of the user recording area, and in the present embodiment, 16 tracks are secured.

First, the function / configuration of each part of the disk recording / reproducing apparatus 1 will be described. Error correction code addition unit 1
1 adds an error correction code to the compressed digital AV data sequentially input to the disc recording / reproducing apparatus 1. In the present embodiment, for this error correction, a Reed-Solomon product code in which AV data for each frame is used as an error correction block and this error correction block is two-dimensionally configured is used. Therefore, the error correction code adding unit 11 first adds the outer code parity and then adds the inner code parity. The auxiliary signal adding unit 12 adds a synchronization signal (SYNC) and an identification signal (ID) for each predetermined AV data, and generates recording data for recording on the MO disc 41. The generated recording data is output to the recording signal switching unit 13 and the buffer 14.

The recording signal switching unit 13 is switched by a control signal from the control unit 31 and selects data to be recorded on the MO disk 41. Recording signal switching unit 13
Is a terminal c for inputting data to the modulator 15 when AV data is being input to the disc recording / reproducing apparatus 1.
Is connected to the terminal a to select the recording data output from the auxiliary signal adding section 12. When the AV data is not input to the disc recording / reproducing apparatus 1, the terminal c is connected to the terminal b to select the recording data output from the memory section 24.

The buffer 14 temporarily stores the recording AV data output from the auxiliary signal adding section 12, and outputs it to the memory section 24 at a predetermined timing. As will be described later, a signal for controlling the storage of data in the memory unit 24 is
It is generated based on the reproduced data of the AV data recorded on the disc 41. Therefore, the buffer 14 is
The recording AV data output from the auxiliary signal adding unit 12 is modulated and recorded on the MO disk 41, the recorded data is reproduced, demodulated and error corrected, and the data storage control of the memory unit 24 is performed based on the result. The AV data is stored until the signal is generated. The AV data is stored in units of the error correction block described above, that is, in the present embodiment, in units of AV data for each frame.

The modulation unit 15 modulates the AV data output from the auxiliary signal addition unit 12 or the memory unit 24 and input via the recording signal switching unit 13, and the MO disk 4
A recording signal for recording 1 is generated. Recording amplifier 1
Reference numeral 6 amplifies the recording signal obtained by the modulation by the modulator 15 and applies it to the recording head 18.

The servo circuit 17 drives the recording head 18 and the reproducing head 19 so as to access a desired recording area of the MO disk 41 based on a control signal input from the control section 31. The servo circuit 17 sequentially records the AV data in the AV data recording area of the MO disc 41 when the disc recording / reproducing apparatus 1 is in the data recording operation and AV data is input.
The recording head 18 and the reproducing head 19 are controlled. When the input of AV data is stopped during the recording operation, the recording head 18 is controlled so as to record the data recorded in the memory section 24, which will be described later, in the preliminary recording area of the MO disk 41.

When the disc recording / reproducing apparatus 1 is in the data reproducing operation, the reproducing head 19 is so arranged as to reproduce the preliminary recording area first before reproducing the AV data and then successively reproduce the AV data recording area. Control. The servo circuit 17 also outputs the accessed address of the recording area of the MO disk 41 to the memory unit 24 and the output data control unit 25. In the servo circuit 17, reference addresses of the AV data recording area and the spare recording area of the MO disc 41 are preset by the control unit 31.

The recording head 18 sequentially records the recording signals applied from the recording amplifier 16 on the MO disk 41.
The reproducing head 19 is the recording head 18 of the MO disk 41.
Are provided so as to access a position shifted by 180 ° and reproduce the data recorded on the MO disk 41. The reproducing head 19 is controlled by the servo circuit 17 so as to access the same recording area as the recording head 18 during the recording operation of the disc recording / reproducing apparatus 1, and a signal newly recorded by the recording head 18 is transferred to the MO disc 41.
When the recorded data reaches a position accessible by the reproducing head 19 after half a turn, the reproduction is immediately performed. Further, the reproducing head 19 is controlled independently of the recording head 18 by the servo circuit 17 during the reproducing operation of the disk recording / reproducing apparatus 1, and reproduces data in an arbitrary recording area of the MO disk 41.

The reproducing amplifier 20 amplifies the signal reproduced by the reproducing head 19 and outputs it to the binary discriminating section 21. The binary discriminator 21 binarizes the signal input from the reproduction amplifier 20 to obtain a digital bit sequence. The demodulation unit 22 demodulates the reproduced signal to restore the original AV data.

The error correction unit 23 performs error correction processing on the AV data demodulated by the demodulation unit 22. At the time of error correction, first, the error correction is performed based on the inner code parity, and then the error correction is performed based on the outer code parity.
Then, when the disc recording / reproducing apparatus 1 is in a recording operation, the error correction section 23 determines whether or not the error correction processing is properly performed, and controls the storage of data in the memory section 24 according to the determination result. To do. That is, when the error correction processing cannot be properly performed, the write signal is output to the memory unit 24 so as to store the data stored in the buffer 14. Further, when the disc recording / reproducing apparatus 1 is in the reproducing operation, the error correction unit 23 outputs the data reproduced from the preliminary recording area of the MO disc 41 to the output data control unit 25 and the rewrite data storage unit 29, and the MO data is reproduced.
The data reproduced from the AV data recording area of the disc 41 is output to the output data switching unit 30.

The memory section 24 is an AV of the MO disk 41.
This is a storage unit that stores AV data that could not be properly recorded in the data recording area for rewriting to the MO disc 41, and is configured by a memory and an address control unit. The memory unit 24 is used for the disc recording / reproducing apparatus 1.
During the recording operation, when the AV data is sequentially input, the AV data temporarily stored in the buffer 14 and the recording address on the MO disk 41 for the AV data input from the servo circuit 17 are recorded. Is entered. When the above-mentioned write signal is input from the error correction unit 23, the input AV data and recording address are stored. Further, when the disc recording / reproducing apparatus 1 is in the recording operation and the input of AV data is stopped, the AV data and the recording address, which have been stored in the memory unit 24 till then, are recorded in the preliminary recording area of the MO disc 41. Output sequentially.

The output data control section 25 outputs the AV data reproduced from the AV data recording area of the MO disk 41 to the AV data recording area of the MO disk 41 in order to output a series of normal AV data during the reproduction operation of the disk recording / reproducing apparatus 1. Since the data could not be normally recorded in the data recording area, the AV data recorded in the preliminary recording area is replaced appropriately. When reproducing the AV data in the disk recording / reproducing apparatus 1, first, the information recorded in the preliminary recording area of the MO disk 41 is read prior to reproducing the series of AV data. The information is the AV that could not be recorded normally in the AV data recording area.
This is information about the data, and A for each one frame
The V data and the recording address of the AV data recording area where the AV data should have been originally recorded. The recording address of the reproduced information is stored in the output data control unit 25, and the AV data is stored in the rewrite data storage unit 29.
Respectively. At that time, the output data control unit 25
In addition to the recording address, the pointer of the AV data stored in the rewrite data storage unit 29 is stored.

When reproduction output of AV data is started, the output data control unit 25 determines whether the reproduced data is normal data based on the address signal input from the servo circuit 17. The normal data, that is, the AV data reproduced from the recording area of the address which is not stored in the output data control unit 25 is connected to the terminal a of the output data switching unit 30 so that the output data is output as it is. Further, when the address input from the servo circuit 17 is AV data reproduced from the recording area of the address stored in the output data control unit 25, the output data control unit 25 causes the AV data corresponding to the address. The rewrite data storage unit 29 is controlled so as to output the data. That is, the pointer of the AV data is output to the rewrite data storage unit 29, which is a data output signal to the rewrite data storage unit 29, and is the selection signal for connecting the terminal c to the terminal a to the output data switching unit 30. Is output to the rewrite data storage unit 29 and the output data switching unit 30.

The structure of the output data control unit 25 will be described with reference to FIG. FIG. 2 is a block diagram showing the configuration of the output data control unit 25. The output data control unit 25 has m stages of shift registers 26 _{-1 to} 26 _-m , a comparator 27 and a D flip-flop 28. In this embodiment, m = 16. Each of the shift registers 26 _{-1 to} 26 _-m is a register of 20 bits, and a recording address reproduced from the spare recording area of the MO disk 41 in the upper 16 bits and a pointer to the AV data of the address in the lower 4 bits. Is memorized.

The comparator 27 includes a first shift register 26.
_The address stored in the upper 16 bits of _-1 is compared with the address input from the servo circuit 17. When the addresses match, the lower 4 bits of the first shift register 26 _-1 are latched in the D flip-flop 28. Further, the latch signal is output to the rewrite data storage unit 29 and the output data switching unit 30 as a data output signal and a selection signal. In the D flip-flop 28, as described above, the lower 4-bit pointer of the first shift register 26 _-1 is set based on the comparison result of the comparator 27 and is output to the rewrite data storage unit 29.

In the output data control unit 25, each time one frame of AV data of the MO disk 41 is accessed, its recording address is input to the comparator 27 and stored in the shift registers 26 _{-1 to} 26 _-n . The data is sequentially shifted and compared with the address stored in the upper 16 bits. Then, when the address stored in any of the shift registers 26 _{-1 to} 26 _-n matches the input address, the rewrite data storage unit 29 stores the frame. A process of outputting the AV data that is being output is performed. In this embodiment, the shift register 26 has a 16-stage structure and can handle up to 16 defective data.
When the number of defective data is less than 16, the shift register 26 in which valid data is not stored is dealt with by invalidating the result of the comparator 27 by a control signal (not shown).

The rewrite data storage unit 29 is used for the MO disc 4 when the disc recording / reproducing apparatus 1 performs a reproducing operation.
The AV data recorded in one preliminary recording area is stored. The rewrite data storage unit 29 stores the data based on the pointer input from the output data control unit 25.
The AV data for each frame is selected, and the AV data is output to the output data switching unit 30 by the output signal similarly input from the output data control unit 25.

The output data switching unit 30 selects AV data to be output from the disc recording / reproducing apparatus 1 based on the control signal output from the output data control unit 25.
Normally, the terminal c is connected to the terminal a for selecting the output AV data from the error correction unit 23, and the MO disk 41
The AV data reproduced from the AV data recording area and subjected to error correction by the error correction unit 23 is output. That AV
Among the data, the AV recorded in the preliminary recording area because the MO disc 41 could not be normally recorded at the time of recording.
Regarding data, the terminal c is connected to the terminal b, and the AV data recorded in the rewrite data storage unit 29 is output.

The control unit 31 includes a disc recording / reproducing device 1b.
By controlling each part of the above, the desired operation as described above is performed. In the control unit 31 of the present embodiment, in particular, A
A signal for identifying recording and reproduction of V data is output to the servo circuit 17, the error correction unit 23, etc., and their operation modes are switched. Further, at the time of data recording, a signal indicating the presence / absence of data input by the input data write signal is output to the memory unit 24, the recording signal switching unit 13, the servo circuit 17, etc. to switch their operation modes.

Next, the operation of the disc recording / reproducing apparatus 1 will be described. First, the operation of the disc recording / reproducing apparatus 1 when recording AV data on the MO disc 41 will be described. When the MO disc 41 is set in the disc recording / reproducing apparatus 1, the control unit 31 first sets the initial address of the AV data recording area of the MO disc 41 and the initial address of the preliminary recording area in the servo circuit 17. In the present embodiment, the outer 16 tracks of the user recording area of the MO disc 41 are the preliminary recording areas, and the other areas are the AV data recording areas. Then, the MO disc 41 is driven so as to rotate once in one frame period in synchronization with the frame synchronization signal of the input AV data.

When shooting is started by the disk camcorder equipped with the disk recording / reproducing apparatus 1, the obtained A
The V data is converted into digital compressed data and input to the disc recording / reproducing apparatus 1. At this time, a data write signal is input to the control unit 31. The input AV data is recorded with an error correction code added by the error correction code addition unit 11 for each frame of AV data, and a synchronization signal (SYNC) and an identification signal (ID) added by the auxiliary signal addition unit 12. Data is generated. The recording data is input to the modulation unit 15 via the recording signal switching unit 13, converted into a recording signal for the MO disk 41 by the modulation unit 15, amplified by the recording amplifier 16, and then recorded by the recording head 1.
8 is recorded on the MO disc 41. At this time, the recording data is also stored in the buffer 14. In this way, the sequentially input AV data is M
One frame of data is sequentially and continuously recorded in the AV data recording area of the O disk 41 so as to correspond to one track.

The data recorded on the MO disk 41 is
After the MO disk 41 has rotated half a turn, the reproducing head 19
Played immediately by. The reproduced signal is amplified by the reproducing amplifier 20, arranged into a binary bit sequence by the binary discriminator 21, demodulated by the demodulator 22 and restored to the original AV data. Then, the error correction unit 23 performs error correction using the error correction code added by the error correction code addition unit 11. If this error correction is normally performed, it means that the recording of the AV data of the frame is completed, assuming that the recording of the input AV data on the MO disc 41 is normally performed.

When the error correction unit 23 cannot correctly perform the error correction, it is determined that the AV data of the frame could not be properly recorded on the MO disk 41, and the AV data of the frame recorded on the buffer 14 is recorded. The recording data is stored in the memory unit 24. At that time, the recording address on the MO disk 41 of the recording data output from the servo circuit 17 to the memory unit 24 is also stored in the memory unit 24 in association with each other.

The state of each data at the time of recording the AV data will be described with reference to FIG. FIG. 3 is a diagram showing a state of each processing data from the recording of data to the recording of the memory section 24 when the data is abnormal during the recording operation of the disc recording / reproducing apparatus 1. FIG. 3 (A)
As shown in FIG. 3, when the recording AV data for each frame is sequentially recorded on the MO disk 41 from the recording head 18, as shown in FIG. Are sequentially read from the reproducing head 19.

It takes about one frame period for the read signal to undergo error correction in the error correction unit 23 via the reproduction amplifier 20, the binary identification unit 21, and the demodulation unit 22. Therefore, the data on which the error correction is performed is shown in FIG.
It is obtained at the timing shown in (C), and when all the data is obtained, it is judged whether or not the error correction is properly performed. As a result, when the error correction cannot be properly performed, the memory write signal as shown in FIG. 3E is input from the error correction unit 23 to the memory unit 24.
Therefore, the recording AV is transferred from the buffer 14 to the memory unit 24 at least at the timing as shown in FIG.
If data has been input, the memory section 24 for that data
Can be properly remembered.

Next, the operation of the disc recording / reproducing apparatus 1 when reproducing the AV data recorded on the MO disc 41 will be described. When the reproduction of the MO disc 41 is instructed, first, the preliminary recording area of the MO disc 41 is accessed, and the AV data and the recording address recorded in the preliminary recording area are read out. The read data is recorded in the output data control unit 25 and the rewrite data storage unit 29 via the reproduction amplifier 20, the binary identification unit 21, the demodulation unit 22, and the error correction unit 23. At this time, the AV data is stored in the rewrite data storage unit 29, and the recording address and the rewrite data storage unit 2 are stored.
The pointer of the AV data stored in 9 is stored in the output data control unit 25.

When the reproduction of the preliminary recording area is completed, next M
Data in the AV data recording area of the O disc 41 is sequentially reproduced. The data reproduced by the reproducing head 19 is amplified by the reproducing amplifier 20, converted into a digital bit sequence by the binary discriminating unit 21, demodulated by the demodulating unit 22 and input to the error correcting unit 23. Then, the error correction unit 23 performs error correction and outputs the data to the output data switching unit 30.
On the other hand, the reproduction address of the AV data is the servo circuit 17
Is input to the output data control unit 25. The output data control unit 25 detects whether the input address matches any of the addresses already stored in the output data control unit 25.

The input address is the output data control unit 2
If it matches the address stored in 5, it means that the AV data of that address is not the data recorded normally, so it is stored in the rewrite data storage unit 29 corresponding to that address. The output AV data is output from the output data switching unit 30. When the input address does not match any address stored in the output data control unit 25, the AV data error-corrected by the error correction unit 23 is output as it is.

As described above, in the disc recording / reproducing apparatus 1 of the present embodiment, the AV information is normally recorded on the MO disc 41.
Even if the data cannot be recorded, the operation such as rewriting is not performed immediately and the AV data and the recording address are stored in the memory unit 24 at that time. Therefore, the input AV data is sequentially recorded on the MO disc 41 regardless of whether the recording is normal or abnormal, that is, without interruption of recording. Then, for example, when the photographer interrupts or terminates the photographing and the input of AV data to the disc recording / reproducing apparatus 1 is stopped, the memory unit 24
Then, the data stored so far is recorded in the preliminary recording area of the MO disk 41. Therefore, it is possible to accurately record the AV data sequentially and continuously input to the MO disc 41 while checking the recorded data. Further, during reproduction, the AV data in the area that could not be normally recorded is sequentially output while being replaced with AV data that has been re-recorded later, so that a normal series of AV data outputs can be obtained.

Second Embodiment As a second embodiment of the present invention, a disk recording / reproducing apparatus for recording AV data on an MO disk cartridge having a nonvolatile memory mounted in the cartridge will be described. FIG. 4 shows the configuration of the disc recording / reproducing apparatus 1b. The disc recording / reproducing apparatus 1b includes an error correction code adding unit 11, an auxiliary signal adding unit 12, and a buffer 1.
4, modulation section 15, recording amplifier 16, servo circuit 17, recording head 18, reproducing head 19, reproducing amplifier 20, binary identifying section 21, demodulating section 22, error correcting section 23, memory section 2
4, an output data switching unit 30, a control unit 31, and an address counter 32.

The basic structure of the disk recording / reproducing apparatus 1b is almost the same as that of the disk recording / reproducing apparatus 1 of the first embodiment shown in FIG. 1, except that the memory section 24, the output data control section 25 and the reproducing section Write data storage unit 29
The difference from the disc recording / reproducing apparatus 1 of the first embodiment is that it is realized by the memory 42 mounted in the disc cartridge 40.

At the time of recording data in the disc recording / reproducing apparatus 1b, the inputted AV data is the same as in the disc recording / reproducing apparatus 1b of the first embodiment, and the error correction code adding section 11, the auxiliary signal adding section 12 and the modulation are added. Recording is performed on the MO disk 41 from the recording head 18 via the unit 15 and the recording amplifier 16. The recording AV data output from the auxiliary signal adding unit 12 is temporarily recorded in the buffer 14 together with the recording address output from the servo circuit 17. The AV data recorded on the MO disc 41 is
Immediately reproduced by the reproducing head 19, the reproducing amplifier 2
It is input to the error correction unit 23 via the 0-binary identification unit 21 and the demodulation unit 22.

When the error correction unit 23 cannot properly perform the error correction and it is determined that the AV data is not normally recorded on the MO disc 41, the error correction unit 23 causes the memory of the MO disc cartridge 40 to be stored. A data write signal is input to 42. as a result,
The AV data stored in the buffer 14 and the recording address on the MO disc 41 are stored in the memory 42. After writing the data in the memory 42, the address of the address counter 32 is counted up so that the next data can be written.

During reproduction, the M from which the data was read
The address on the O disk 41 and the recording address stored in the memory 42 are compared by the comparator 27, and the memory 42
When the data of the address recorded in (4) is read, the output data switching unit 30 is switched to output the AV data which is also recorded in the memory 42. The operations of the other parts are the same as those of the disc recording / reproducing apparatus 1b in the first embodiment.

As described above, in the disc recording / reproducing apparatus 1b of this embodiment, the AV data that could not be normally recorded on the MO disc 41 is stored in the memory 42 mounted on the MO disc cartridge 40. Therefore, the AV data can be stored in parallel with the recording of the AV data on the MO disc 41. That is, as in the disc recording / reproducing apparatus 1b of the first embodiment, while the input of AV data is stopped, the AV data is reproduced.
The operation of recording data on the MO disk 41 can be omitted. Further, since the recording signal switching unit 13, the memory unit 24, the output data control unit 25, and the rewriting data storage unit 29 can be deleted, the device configuration can be greatly simplified.

The disc recording / reproducing apparatus of the present invention is
The present invention is not limited to the above-described first and second embodiments, and various modifications can be made. For example, in the above-described embodiment, the AV data that could not be normally recorded in the AV data recording area of the MO disk for the first time is recorded in the spare recording area of the MO disk or the memory of the MO disk cartridge for the second time. doing. But,
The original area to be recorded of the MO disk may be rewritten, and if the recording is still not successful, the recording may be performed in the recording section as described above.

Further, the method of determining whether or not the error correction has been normally performed in the error correction unit may be any method depending on the error correction method or the like. For example, when the number of erroneous bytes exceeds a predetermined number, the above-mentioned determination, that is, the determination that the data is not normally recorded may be performed. Further, the parity bit for error correction may have redundancy so that such a determination can be performed.

Further, the error correction block in the error correction code adding section is AV data for each frame in the above-mentioned embodiment, but one field unit or a smaller unit may be used as the error correction block. On the contrary, a larger unit may be used as the error correction block, such as every plural frames or every 1 GOP. The error correction method is not limited to the Reed-Solomon code, and any method may be used.

The configuration of the output data control unit is not limited to the configuration using the shift register shown in FIG. 2, but may be configured using a normal data storage means composed of a memory and an address control unit. . Further, the output data control unit and the rewrite data storage unit 29 may be integrated to store the AV data and the recording address in the same data storage unit.

In each of the above-described embodiments, M
Although the disk recording / reproducing apparatus records AV data on an O disk, a magnetic disk apparatus or an apparatus using an optical disk apparatus as a recording medium may be used. Also, M
The configuration of the AV data recording area and the preliminary recording area in the recording area of the O disc may be arbitrary.

[0051]

According to the disc recording / reproducing apparatus of the present invention, recording data is sequentially checked for sequentially inputted AV data, and when an abnormality occurs, the AV data is recorded. Normal data rewriting can be performed without interruption. Therefore, it is possible to provide a disc recording / reproducing apparatus capable of accurately recording AV data on a disc-shaped recording medium.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a disc recording / reproducing apparatus according to a first embodiment of the present invention.

2 is a block diagram showing a configuration of an output data control unit 25 of the disc recording / reproducing apparatus shown in FIG.

FIG. 3 is a block diagram of the disc recording / reproducing apparatus shown in FIG.
It is a figure which shows the timing of the data rewriting operation | movement with respect to a defective block.

FIG. 4 is a block diagram showing a configuration of a disc recording / reproducing apparatus according to a second embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disk recording / reproducing apparatus 11 ... Error correction code addition section 12 ... Auxiliary signal addition section 13 ... Recording signal switching section 14 ... Buffer 15 ... Modulation section 16 ... Recording amplifier 17 ... Servo circuit 18 ... Recording head 19 ... Reproducing head 20 ... Reproduction amplifier 21 ... Binary discrimination section 22 ... Demodulation section 23 ... Error correction section 24 ... Memory section 25 ... Output data control section 26 ... Shift register 27 ... Comparator 28 ... D flip-flop 29 ... Rewrite data storage section 30 ... Output Data switching unit 31 ... Control unit 32 ... Address counter 40 ... MO disc cartridge 41 ... MO disc 42 ... Memory

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G11B 27/36 G11B 27/36 A H04N 5/85 H04N 5/85 Z // G11B 23/30 G11B 23/30 Z C3 27/36 A

Claims (4)

[Claims] 1. A recording means having a disk-shaped recording medium,
A disc recording / reproducing apparatus for recording AV data, comprising: an error correction code adding unit for adding an error correction code for each predetermined unit of sequentially input AV data to generate AV data for recording; First recording processing means for recording the AV data for use on the disk-shaped recording medium, reproduction processing means for immediately reproducing the recorded AV data, and the error correction for the reproduced AV data. Error correction means for performing error correction using a code; and when the error correction cannot be performed properly, the recording AV data and the A in the disk-shaped recording medium.
A disk recording / reproducing apparatus having a second recording processing means for recording the recording address of V data in the recording means. 2. The second recording processing means records the recording AV data and the recording address in a predetermined preliminary recording area of the disc-shaped recording medium during a time period when the AV data is not input. The disc recording / reproducing apparatus according to claim 1. 3. The recording means is a disk cartridge device in which a disk-shaped recording medium is housed in a case and a non-volatile memory means is mounted in the case, and the second recording processing means is the recording medium. The disc recording / reproducing apparatus according to claim 1, wherein the AV data and the recording address are recorded in the nonvolatile memory means. 4. The reproduction processing means sequentially reproduces the AV data recorded on the disk-shaped recording medium, and the address of the reproduced AV data on the disk-shaped recording medium and the address recorded on the recording means. Comparing means for comparing with the recording address, and as a result of the comparison, if the address of the reproduced AV data does not match any of the recorded addresses, the reproduced AV data is output and the reproduced AV data is reproduced. The disk according to any one of claims 1 to 3, further comprising data output means for outputting the AV data recorded in the recording means together with the address when the address of the recorded AV data matches the recorded address. Recording / playback device.