KR100661381B1 - Error correction circuit, disk drive, error correction method, and method for reproducing a disk - Google Patents

Abstract

Receives an ECC block data, a sector number and a sync frame number for each frame, receives an identification signal indicating whether the ECC block data is based on the first standard or the second standard having a higher recording density than this, and the identification signal is generated. 2, the conversion unit 21 converts and outputs the area number (A, B) of the frame from the sector number and the sync frame number, and the ECC recognized by receiving the sector number, the sync frame number and this area number. A determination unit 22 that calculates an error correction code included in the ECC block data based on the position of the block data and determines whether there is an error, and a correction unit 24 that corrects the data error when the determination unit determines that there is an error. , 25, 26).

Error correction circuit, disk unit, ECC, sink number

Description

Error correction circuit and disk unit, error correction method, and disc playback method {ERROR CORRECTION CIRCUIT, DISK DRIVE, ERROR CORRECTION METHOD, AND METHOD FOR REPRODUCING A DISK}

1 is a block diagram showing an example of the configuration of an optical disk device including an example of an ECC circuit according to the present invention;

Fig. 2 is a block diagram showing an example of the configuration of a data position conversion circuit included in the ECC circuit according to the present invention.

3 is a block diagram showing an example of a part of a configuration of a correction execution circuit included in an ECC circuit according to the present invention.

4 is a block diagram showing an example of a part of a configuration of a data position conversion circuit included in an ECC circuit according to the present invention.

5 is a data configuration diagram showing an example of one ECC block of a next-generation DVD handled by an ECC circuit according to the present invention.

6 is a data configuration diagram showing an example of one ECC block of the current DVD handled by the ECC circuit according to the present invention.

7 is a data configuration diagram showing an example of a transmission format of a next-generation DVD handled by an ECC circuit according to the present invention.

8 is a data configuration diagram showing an example of a transmission format of a current DVD handled by an ECC circuit according to the present invention.

9 is a conceptual diagram showing an example of a transmission format of reproduction data of a next generation DVD handled by an ECC circuit according to the present invention.

10 is a conceptual diagram showing an example of a transmission format of reproduction data of a current DVD handled by an ECC circuit according to the present invention.

Fig. 11 is a conceptual diagram showing an example of data transmission in the case of missing data by the ECC circuit according to the present invention.

12 is a diagram showing an example of a ROW conversion circuit input / output signal of a next-generation DVD of an ECC circuit according to the present invention.

13 is a diagram showing an example of transmission of data position information of an ECC circuit according to the present invention;

Fig. 14 is a diagram showing an example of a DRAM storage format when the ROW conversion circuit of the next-generation DVD of the ECC circuit of the present invention is used.

15 shows an example of a format of a PI syndrome storage SRAM of an ECC circuit according to the present invention.

16 is a diagram showing an example of transmission of data position information of an ECC circuit according to the present invention;

17 is a flowchart showing an example of error correction processing by the ECC circuit according to the present invention;

<Explanation of symbols for the main parts of the drawings>

11: pickup section

12: preamp

13: preamp equalizer

14: synchronous demodulator

15: ECC circuit

16: MPEG decoder

17: interface

18: System Control

The present invention relates to an error correction circuit and a disk device, and more particularly, to an error correction circuit, a disk device, an error correction method, and a disc reproducing method based on ECC block data of a next-generation digital versatile disc (DVD).

Background Art In recent years, optical disc devices such as DVD (Digital Versatile Disc) have become widespread, and various methods of research and development have been conducted and commercialized. In such an optical disk apparatus, a disk with a higher recording density is desired, and accordingly, a next-generation DVD which has a capacity of about 20G bytes using a blue laser (650 nm) is planned.

In the next-generation DVD, the standard of ECC (Error Correction Code) block data handled by the error correction circuit is also different from that of the current DVD. Therefore, the error correction circuit must also correspond to the playback apparatus that reproduces both the current DVD and the next-generation DVD.

Patent Document 1 (Patent Publication No. Hei 9-115244) indicates that a recording / playback apparatus for reproducing both a CD (Compact Disc) and a DVD and an integrated circuit thereof must also use the configuration in an error correction circuit.

However, in the above-mentioned prior art of patent document 1, although it is suggested that the structure of the error correction circuit of CD and DVD should be used together, the specific structure is not shown. In addition, there is a problem that nothing is shown about how to use an error correction circuit between the current DVD and the next-generation DVD.

That is, the ECC (Error Correction Code) block data of the current DVD is 16 sectors, and the ECC block data of the next generation DVD is 32 sectors, which is twice the data size of the current DVD. In other words, in the next-generation DVD, the processing speed is improved by performing error correction processing at twice the data size. In the ECC block data of the next generation DVD, not only the sector number and the sync frame number but also the area information of the bank are provided as the position information of the data to manage the ECC block data.

An object of the present invention is to provide an error correction circuit, a disk device, an error correction method, and a disk playback method that can correct and reproduce both ECC blocks of current DVDs and next-generation DVDs.

The present invention receives ECC block data, sector number and sync frame number for each frame, and receives an identification signal indicating whether the ECC block data is based on a first standard or a second standard having a higher recording density than the first standard. A conversion unit for converting and outputting the area number of the frame from the sector number and the sync frame number when the identification signal indicates the second standard, and further receiving the sector number and the sync frame number; A determination unit that calculates an error correction code included in the ECC block data based on the position of the ECC block data recognized by receiving the area number, and determines whether an error is present; If it is determined that the error is determined, the error correction circuit is provided with a correction unit for correcting the error.

The present invention also provides a readout unit for reading data stored in a disc and outputting a read signal, a demodulator for demodulating the readout signal and outputting ECC block data, the sector number and the frame number, and the readout signal. An identification unit for discriminating whether the disc is based on a first standard or a second standard having a higher recording density than the first standard, and outputting an identification signal, and receiving the identification signal from the identification unit, The demodulator receives the ECC block data, the sector number, and the sync frame number for each frame, and converts the area number of the frame from the sector number and the sync frame number when the identification signal indicates the second standard. And a conversion unit for outputting the received data, the sector number and the sync frame number, and the area number in the conversion unit. A determination unit that calculates an error correction code included in the ECC block data based on the position of the ECC block data recognized as sound and determines whether there is an error, and when the determination unit determines that there is an error in the ECC block data, And a correction unit for correcting errors.

In the error correction circuit and the disk apparatus according to the present invention described above, after identifying whether the disk is the current DVD or the next-generation DVD from the disc management information or the like, and if the next-generation DVD (the second standard), the sector number and the sync frame number are given. Area numbers (bank numbers) on the A side and B side are converted into the error correction circuit. Then, at least the sector number, the sync frame number, and the area number recognize the data position of the ECC block data while calculating an error correction process, that is, a PI syndrome included in the ECC block data, to determine whether there is an error. If there is an error, the corrective action is taken.

The size of ECC block data at this time is 16 sectors in the current DVD (first standard) and 32 sectors in the next-generation DVD (second standard). Since the capacity of one sector between the current DVD and the next-generation DVD is the same, the next-generation DVD performs error correction processing by ECC block data twice the size of the current DVD.

Further, it is suitable to convert the row number and the first half half identifier SFPRI (182 bytes first half frame or the second half frame) from the sector number and the sync frame number to recognize and use the data position of the ECC block data.

That is, in order to perform error correction processing of ECC block data between the current DVD and the next-generation DVD by a common error correction circuit, at least the disc is identified as described above, and the sector number and sync frame number for the next-generation DVD according to the identification result. It is necessary to convert the area number (bank number) and perform error correction processing while using this position information in the element elements of the subsequent correction circuit.

Hereinafter, an error correction circuit, a disk device, an error correction method, and a disk reproducing method according to the present invention will be described in detail with reference to the drawings.

1 is a block diagram showing an example of the configuration of an optical disk device including an example of an ECC circuit according to the present invention, and FIG. 2 is an example of a configuration of a data position conversion circuit included in the ECC circuit according to the present invention. 3 is a block diagram showing an example of a part of the configuration of the correction execution circuit included in the ECC circuit according to the present invention, and FIG. 4 is a part of the configuration of the data position conversion circuit included in the ECC circuit according to the present invention. It is a block diagram showing an example.

In the error correction circuit, the disk device, the error correction method, and the disk reproducing method according to the present invention, ECC block data between the current DVD and the next-generation DVD, which are handled by a common configuration, includes 16 sectors of the current DVD and 32 sectors of the next-generation DVD. Next-generation DVD's ECC block data has twice the data size of the current. That is, in the next-generation DVD, error correction processing is performed in units of twice the data size, thereby improving the processing speed. At this time, the ECC block data is managed by providing not only the sector number and the sync frame number but also area information such as a bank as position information of the ECC block data of the next generation DVD.

<Optical disk device according to the present invention>

(Configuration)

In the optical disk apparatus according to the present invention, as shown in Fig. 1, for example, a recording medium D such as a DVD is loaded on a turntable (not shown), so that the information recorded on the recording medium D is picked up. Read by (11). The pickup section 11 is equipped with at least a red laser unit and a blue laser unit to cope with the current DVD and the next generation DVD, and is selectively used according to the type of the disc to irradiate the laser onto the disc. The pickup section 11 that receives the reflected light of the irradiated laser outputs a read signal corresponding to the irradiated laser, and the read signal is supplied to the preamplifier 12 and amplified to an appropriate value. Equalization is carried out with an appropriate waveform in.

Further, in the equalized-processed read signal, a frame synchronization signal or the like is detected by the synchronization demodulation unit 14, and the demodulation process of the read signal is performed while synchronizing with the frame synchronization signal. In addition, ECC block data is detected here, 182 bytes of data are divided into 91 bytes of first half data and 91 bytes of second half data, and are transmitted to the ECC circuit 15 as sync frame data. After 24 sync frames are transmitted for both the next generation DVD and the current DVD, 2 sync frames of the interleaved portion are transmitted. That is, in the next generation DVD and the current DVD, the transfer data amount in one sector is the same, and the transfer order is also the same.

Further, the synchronization demodulation section 14 detects the sector number SCNO and the sync frame number SFNO as the data position information, and supplies it to the ECC circuit 15. In addition, correction information corrected by the ECC circuit 15 is supplied to the MPEG decoder 16 so that video and audio information decoded based on MPEG is transmitted through an interface 17 or the like. And a reproducing apparatus such as an amplifier or a speaker.

In addition, the system control unit 18 controls the operation of the entire system, and detects management information in the management area of the disc D based on the read signal obtained by the pre-waveform equalizer 13 waveform-shaping. On the basis of this, it is determined whether the optical disk D is the next generation DVD or the current DVD, and the identification information S is supplied to each part.

In addition, the ECC circuit 15 is supplied with an identification signal S from the system control unit 18, and a data position conversion circuit 21 supplied with the sync number SCNO and the frame number SDNO from the synchronous demodulation unit 14. ) Further, the ECC circuit 15 includes a preceding calculation judgment circuit 22 to which position information such as a bank number is supplied from the data position conversion circuit 21, a determination result of the preceding calculation judgment circuit 22, and a data position conversion circuit ( From the syndrome calculation result storage buffer group 23 to which the position information of 21 is supplied, the calculation result from the syndrome calculation result storage buffer group 23, the position information of the data position conversion circuit 21, and the system control unit 18. An identification signal S is supplied, a correction execution circuit 24 for error correction, a memory unit 26 for supplying ECC block data from the synchronous demodulation unit 14 and storing it in a memory area such as a DRAM, The memory control section 25 receives the control signal from the correction execution circuit 24 and controls the operation of the memory section 26 to correct errors of the ECC block data. The ECC circuit 15 performs error correction processing of the ECC block data for the current DVD and the next-generation DVD as described later using a flowchart.

As shown in Fig. 2, the data position conversion circuit 21 includes a selector 33 which receives the identification signal S between the next-generation DVD and the current DVD, and the sync number SCNO and the frame from the synchronization demodulator 14; A row conversion circuit 31 for next-generation DVD supplied with the number SDNO and a row conversion circuit 32 for current DVD supplied with the sync number SCNO and the frame number SDNO are similarly provided.

Further, as shown in Fig. 4, the data position conversion circuit 21-2 includes a selector 33 which receives the identification signal S between the next-generation DVD and the current DVD, and the sync number SCNO from the synchronization demodulator 14. And a row conversion circuit 34 for a next generation DVD and a current DVD supplied with a frame number SDNO.

In addition, the syndrome calculation result storage buffer group 23 includes the A side and B side recognition circuits 27 to which the sink number SCNO and the frame number SDNO are supplied from the synchronous demodulation unit 14, as shown in FIG. And the selector 28 to which the output is supplied and the identification signal S of the next generation DVD and the current DVD is supplied, the address decoder 29 to which the output of the selector 28 is supplied, and the address decoder 29 It has a storage buffer 26 such as an SRAM to which the output and the calculation result from the preceding calculation judgment circuit 22 are output.

(ECC block data handled by the optical disk device according to the present invention)

Next, ECC block data and specific error correction processing handled by the optical disk apparatus according to the present invention will be described in detail with reference to the drawings. 5 is a data configuration diagram showing an example of one ECC block of the next-generation DVD handled by the ECC circuit according to the present invention. FIG. 6 is an example of one ECC block of the current DVD handled by the ECC circuit according to the present invention. Fig. 7 is a data configuration diagram showing an example of the transmission format of the next generation DVD handled by the ECC circuit according to the present invention. Fig. 8 is a view of the current DVD transmission format handled by the ECC circuit according to the present invention. Fig. 9 is a conceptual diagram showing an example of the transmission format of the reproduction data of the next-generation DVD handled by the ECC circuit according to the present invention, and Fig. 10 is a diagram of the current DVD handled by the ECC circuit according to the present invention. A conceptual diagram showing an example of a transmission format of reproduction data, and FIG. 12 is a diagram showing an example of a low conversion circuit input / output signal of a next-generation DVD of an ECC circuit according to the present invention.

(ECC block data)

The data structure of one ECC block data of the next-generation DVD is shown in FIG. 5, and the data structure of one ECC block data of the current DVD is shown in FIG. Here, one ECC block data of the next generation DVD has a configuration in which one ECC block data of the current DVD is lined up. As shown in Fig. 5, the left half block is referred to as the A side and the right half block B side, and the position information of the A side and the B side, and the area number is unique to the ECC block data of the next generation DVD, This area number is used in each part of the ECC circuit 15.

In addition, in FIG. 5, the shadow part of drawing shows PI and PO parity part. 10 bytes of error correction code (PI parity) is added to 172 bytes of data in the horizontal direction (PI direction) to form 182 bytes of code, and 16 bytes of error in 192 bytes of data in the vertical direction (PO direction). A correction code (PO parity) is added to form a code of 208 bytes. In addition, the numerical value in a figure has shown the row number.

As can be seen from Figs. 5 and 6, the ECC block data of the current DVD is 16 sectors, and the ECC block data of the next generation DVD is 32 sectors, which is twice the data size of the current DVD. Therefore, in the next generation DVD, the processing speed is improved by performing the error correction processing at twice the data size. In addition, in the ECC block data of the next generation DVD, unlike the current DVD position information of FIG. 12B as shown in FIG. 12A, in addition to the sector number and sync frame number as the position information of the data, Area information called a bank is installed to manage ECC block data.

The ECC block data actually sent from the synchronous demodulator 14 has PO syndrome data interleaved in the last frame of each sector with respect to the ECC block data of FIGS. 5 and 6. A data structure as shown in FIG. 7 and 8 are enlarged views shown in Figs. 9 and 10, and the transmission order of specific frames is shown by numerals and arrows, respectively. That is, the data from the synchronous demodulator 14 is divided into 182 byte data into 91 bytes of first half data and 91 bytes of second half data and transmitted as sync frame data. After 24 sync frames are transmitted for both the next generation DVD and the current DVD, 2 sync frames of the interleaved portion are transmitted. That is, in the next generation DVD and the current DVD, the transfer data amount in one sector is the same, and the transfer order is also the same. Therefore, a circuit for performing advanced syndrome calculation or advanced EDC calculation in the next generation DVD and the current DVD can be performed in common.

FIG. 13 shows a specific example of the data position information corresponding to the example of the item of the data position information of FIG. 12 used in the ECC circuit of the optical disk apparatus according to the present invention. That is, in Fig. 13, (a) shows the data position information of the next generation DVD, and the specific example of the frame number, row number, bank number, and the first half of the frame, SFPRI, for 32 sectors, is shown. A specific example of the data position information of the DVD, the frame number for 16 sectors, the row number, and SFPRI, which is an identifier of the first half of the frame, is shown.

<Error correction processing>

Next, the operation of the ECC (error correction) circuit 15 of the optical disk apparatus according to the present invention will be described in detail below using the flowchart of FIG. In addition, although the ECC circuit 15 is comprised by several circuit in FIG. 1, it is also suitable to comprise it as a data processing unit by a microcomputer and a program, In this case, the program which implements the flowchart of FIG. It is possible by.

Here, FIG. 11 is a conceptual diagram showing an example of data transmission when data is missing by the ECC circuit according to the present invention, and FIG. 13 is a diagram showing an example of data position information transmission of the ECC circuit according to the present invention. Is a diagram showing an example of a DRAM storage format when a row conversion circuit of a next-generation DVD of an ECC circuit according to the present invention is used, and FIG. 15 is a diagram showing an example of a format of a PI syndrome storage SRAM of an ECC circuit according to the present invention. 16 is a diagram showing an example of transmission of data position information of an ECC circuit according to the present invention, and FIG. 17 is a flowchart showing an example of error correction processing by the ECC circuit according to the present invention.

In the ECC circuit 15 of the optical disk apparatus according to the present invention, the ECC block data, sector number, and frame number are acquired from the synchronous demodulation unit 14, and the disc identification signal is acquired from the control unit 18 (S11). ). At this time, the supplied ECC block data is ECC block data shown in FIG. 7 in which data of FIG. 5 is interleaved if it is a next generation DVD. The current DVD is ECC block data shown in Fig. 8 in which the data in Fig. 6 are interleaved. At this time, ECC block data is supplied for each frame in the order shown in FIG. 9 for the next generation DVD, and for each frame in the order shown in FIG. 10 for the current DVD.

The system control unit 18 controls the overall operation of the optical disc apparatus, but the optical pickup 11 reads management information of the management area of the optical disc D as a function of a part of the system control unit 18. It acquires via the synchronous demodulation part 14 as a read signal, and it is judged based on this management information whether an optical disc D is a next generation DVD or a current DVD (S12). The identification information S is output based on the determination result, and the identification information S is outputted to the data position conversion circuit 21, the preceding calculation determination circuit 22, the syndrome calculation result storage buffer group 23, the memory control unit 25, and the like. Supply.

Here, the data position conversion circuit 21 can have at least two forms as shown in Figs. 2 and 4, and in Fig. 2, the row conversion circuit 31 for the next generation DVD and the row conversion circuit 32 for the current DVD are shown. Are respectively provided, and the respective outputs are selectively output to the selector 33 in accordance with the result of the identification information (S). Accordingly, in the next generation DVD, the area information, which is the bank number of the A side, the B side, and the like, is output with the sync number SCNO, the frame number SDNO, and the SFPRI as the first half half identifier.

On the other hand, in Fig. 4, only the row conversion circuit 34 used in combination with the next-generation DVD and the current DVD is provided. The identifier SFPRI is output. And these outputs are selectively output to the selector 33 according to the result of identification information S. As shown in FIG. As a result, the same function as in the case of FIG. 2 is provided.

According to these configurations, the next generation DVD converts the sector number and the frame number from the row number and the first half half identifier (SFPRI), and further converts the area number indicating whether the A side or the B side is output (S13). In the case of the current DVD, the row number and the first half half identifier SFPRI are converted from the sector number and the frame number to be output (S14).

Each item of data position information at this time is shown in FIG. 12, and a specific example of data position information is shown in FIG. That is, in Fig. 13, (a) shows the data position information of the next generation DVD, and the specific example of the frame number, row number, bank number, and the first half of the frame, SFPRI, for 32 sectors, is shown. A specific example of the data position information of the DVD, the frame number for 16 sectors, the row number, and SFPRI, which is an identifier of the first half of the frame, is shown. Further, as shown in Fig. 16, the data position information is the same as in Fig. 13 as shown in (a) in the next generation DVD, but in the current DVD, only the sector number and the frame number are processed as shown in (b). It is suitable even if it does. In this case, the data position conversion circuit 21 does not need to output the ROW number and the SFPRI which is the first half late identifier in the current DVD.

(Specific example of conversion processing of data position conversion circuit)

Here, the specific example of the conversion process of the conversion circuits 31, 32, 34 is given below.

`` BANK '' area number

The even sectors (sector numbers are even) are alternately arranged on the A side and the B side by two sync frames from the A side ECC block, and the odd sectors (the odd sector numbers are the B side by two sync frames from the B side ECC block), Alternately with A side.

An example of conversion formula is shown below.

If (SCNO [0] = 0)

BANK = ((SFNO / 2)% 2);

else

BANK = 1-((SFNO / 2)% 2);

end

First half identifier of "SFPRI" frame

Signal indicating whether the first half frame or the second half frame of the PI sequence 182 bytes is used. If the frame number is even, it is first half. If it is odd, it is second half.

An example of conversion formula is as follows.

SFPRI = SFNO [0];

end

"ROWNO" row number

This is a signal indicating the line numbers 0 to 207 in the ECC block. It is interleaved at the time of recording and returns to the original state. The sector leading frame enters the row (6 x sector number), and the row number is incremented every four frames from frame 0 to frame 23. 24 frames and 25 frames are part of PO and are arranged after 192 rows. As for the PO portion, the 0th sector is arranged on the 192nd line, and then the row number increases every 2 sectors.

The conversion formula is as follows.

If (SFNO≤23)

ROWNO = (6 * SCNO) + (SFNO / 4);

else

ROWNO = 192 + (SCNO / 2);

end

Next, the preceding calculation determination circuit 22 having received the above-described positional information acquires the PO syndrome of the ECC block data using the given positional information, and performs this calculation to determine whether there is an error (S15). If there is no error (S16), the ECC block data stored in the memory unit 26 such as DRAM is output to the MPEG decoder 16 as it is and the process of the ECC circuit 15 is finished (S18). However, if there is an error, the PO syndrome and the PI syndrome are computed based on the given positional information to correct and output the error of the ECC block data (S17). Accordingly, the ECC circuit 15 having a common configuration enables error correction processing for the next generation DVD and the current DVD.

(Storage format of PI syndrome by SRAM)

The use form of the storage area of the SRAM of the PO syndrome of the next generation DVD by the preceding calculation judgment circuit 22 and the syndrome calculation result storage buffer group 23 at this time is described below. That is, in the syndrome calculation result storage buffer group 23, as shown in FIG. 3, the storage position of the PI syndrome in the static random access memory (SRAM) is the A side and B side recognition circuit 27 and the address decoder. Determine using (29). That is, the A surface and B surface recognition circuit 27 which receives the BANK number as the area information recognizes the A / B surface ("0" or "1") using the data attribute signals SCNO and SFNO. The selector 28 to which the identification information S of the DVD is supplied selects an output from the A side and B side recognition circuits 27 for the next generation DVD, and selects the signal "0" for the current DVD. The address decoder 29 decodes the address. As a result, as shown in FIG. 15, PI syndromes are classified and stored for each of the A side and the B side in the next generation DVD, and are sequentially stored in the current DVD. With this arrangement, the PI syndrome storage SRAM of the next generation DVD and the current DVD can be stored by a common SRAM.

DRAM Storage Format of Correction Execution Circuit

Storage of the ECC block data DRAM when the preliminary calculation judgment circuit 22 determines that there is an error and the correction execution circuit 24, the memory control unit 25, and the memory unit 26 perform the error data correction process. Is preferably performed by the following format.

That is, the data from the synchronous decoding unit 14 may cause a synchronous abnormality (missing, overlapping or replacing of data) due to an abnormality or a disturbance of the servo on the optical disk system side. As a result, data arrivals are irregular, and data mismatch occurs between data stored in the DRAM and data that has been previously calculated and corrected. It is a conceptual diagram which shows an example of data transfer at the time of data omission.

In the ECC circuit 15, data is transmitted from the synchronous demodulator 14 in sync frames of 91 byte units. Here, when there is a missing (missing) in the sync frame, the ECC block data is stored in the DRAM 26 as it is, without the omission being compensated. In parallel, Syndrome is calculated in the preceding calculation circuit, and after correction execution, error data (error value and error position in the block) is output. At that time, since missing data is ignored, mismatching occurs between the data when the error data is merged with the data in the DRAM.

As a way of avoiding this, it is necessary that the storage buffer group 23 and the memory control section 25 always recognize the processing position in the ECC block. Although data attribute signals of sector number and frame number are transmitted from the synchronous demodulator 14, it is difficult to specify the position within the ECC block using only these signals. Thus, the data attribute signal is newly generated by using the data position conversion circuit 21. That is, not only the sector number (SCNO) and the sync frame number (SFNO), but also the row number, the area number (BANK number) generated by the data position conversion circuit 21, SFPRI (first half half of the frame), and the like as the data position information. To supply. By supplying these positional information, the memory control section 25 can quickly recognize the omission of block data. As a result, as shown in the map of the DRAM 26 of FIG. 11, the missing portion can be secured as an empty area, and then the next data can be stored.

That is, in FIG. 14, the DRAM format when the data from the synchronous original recovery system is stored in the DRAM 26 in the case of the next generation DVD is shown. In this format, the A side and the B side can be distinguished and arranged by using SCNO, SFNO, BANK, ROWNO, and SFPRI signals. In addition, if missing, " 0 " data is recorded as missing and duplicated. You can later ignore or overwrite the data. In addition, in the case of replacement, it may be placed in a normal position in response to the replacement. By storing in this way, the storage area of the DRAM becomes an area determined as 192 (column) in the column direction and 416 (= 208 x 2) in the row direction, and the DRAM storage location is defined as an ECC circuit or the like. Because the onboard processor is aware, it can efficiently access DRAM. In addition, since the storage area is divided into the A side, the B side, and the PO parity portion, it is possible to efficiently read data from the DRAM 26 when outputting data from the DRAM 26 to the HOST side after decoding.

As described above, in the ECC circuit and the optical disk apparatus according to the present invention, the next-generation DVD and the current DVD are identified by one configuration. Furthermore, in the next-generation DVD, the area number (A side, B side) of the frame is determined. The use of the data position information provides an ECC circuit and an optical disk apparatus that can reliably correct errors or transmit data even when data is missing, thereby enabling stable decoding processing and reproduction processing.

The present invention can be realized by those skilled in the art by the various embodiments described above, but it is easy for the person skilled in the art to come up with various modifications of these embodiments, and the present invention can be applied to various embodiments without having the inventive ability. It is possible to do Accordingly, the present invention extends to a wide range that does not contradict the disclosed principles and novel features, and is not limited to the embodiments described above.

Claims (20)

ECC block data, sector number, and sync frame number are received for each frame, and the ECC block data is based on a first standard to which a region containing the first feature A is assigned or a recording density is higher than that of the first standard. When the identification signal indicating whether the area which is high and includes the first feature A and the second feature B corresponding to the first feature A is based on the given second standard indicates the second standard, the A conversion unit (21) for converting an area number (first feature (A), second feature (B)) of the frame from the sector number and the sync frame number; Receives the sector number and the sync frame number, calculates an error correction code included in the ECC block data based on the position of the ECC block data recognized by receiving the area number from the conversion unit, and whether there is an error. Determination unit 22 for determining the; If the determination unit determines that there is an error in the ECC block data, the correction units 24, 25, and 26 correcting the error. And an error correction circuit. The ECC block data according to claim 1, wherein the ECC block data is based on 32 sectors when the ECC block data is based on the second standard, and when the ECC block data is based on the first standard, Error correction circuitry, by 16 sectors. The error correcting circuit according to claim 1, wherein the converting unit identifies the first half half identifier and the row number of the frame from the sector number and the sync frame number, and supplies them to the determination unit and the correction unit. The method of claim 1, wherein the conversion unit 21, A first conversion unit which receives the sector number and the sync frame number, converts the first half half identifier and the row number and outputs the converted first half number; A second conversion unit which receives the sector number and the sync frame number, converts the first half half identifier, the row number, and the area number into output; Including; When the identification signal indicates the first standard by receiving the output of the first conversion unit and the second conversion unit, the output from the first conversion unit is selected, and when the identification signal indicates the second standard, And an output from the second converting section to supply the determining section and the correcting section. 2. The conversion unit 21 according to claim 1, wherein the conversion unit 21 receives the sector number and the sync frame number, converts the first half half identifier and the row number, and converts the area number if the area number can be converted. Error correction circuit comprising a conversion unit to be. The area of the missing portion according to claim 1, wherein the correction unit determines that there is a missing portion in the ECC block data based on the sector number and the sync frame number. Wherein the ECC block data is sequentially stored as a free area. The error correction circuit according to claim 1, wherein the determination unit classifies the calculation result of the error correction code included in the ECC block according to the area number and stores the result in the storage area. A reading unit 11 for reading data stored in the disk and outputting a read signal; A demodulator (14) for demodulating the read signal and outputting ECC block data, sector number and sync frame number; Based on the read signal, the disc is based on a first standard having an ECC block to which an area containing the first feature A is assigned, or a recording density is higher than the first standard, and the first feature ( An identification unit 18 for identifying whether the area including A) and the second feature B corresponding to the first feature A is based on a second standard having an assigned ECC block, and outputting an identification signal; ; The identification unit receives the identification signal, and the demodulation unit receives the ECC block data, the sector number, and the sync frame number for each frame, and when the identification signal indicates the second standard, A conversion unit (21) for converting and outputting area numbers (A, B) of the frame from the sync frame number; On the basis of the position of the ECC block data recognized by receiving the sector number and the sync frame number and receiving the area number in the conversion unit, an error correction code included in the ECC block data is calculated to determine whether there is an error. A judging unit 22 for judging; If the determination unit determines that there is an error in the ECC block data, the correction units 24, 25, and 26 correcting the error. And a disk device. The disk apparatus according to claim 8, wherein the identification section identifies whether the disk is based on the first standard or the second standard based on identification information of a management area of the disk included in the read signal. 10. The apparatus of claim 8, wherein the reading unit reads the stored data by a red laser for the disc based on the first standard, and reads the stored data by a blue laser for the disc based on the second standard. A disk device, characterized in that for reading. ECC block data, sector number, and sync frame number are received for each frame, and the ECC block data is based on a first standard to which a region containing the first feature A is assigned or a recording density is higher than that of the first standard. When the identification signal indicating whether the area which is high and includes the first feature A and the second feature B corresponding to the first feature A is based on the given second standard indicates the second standard, the Converting the sector number and the area number (first feature (A), second feature (B)) of the frame from the sync frame number; Determining an error presence by calculating an error correction code included in the ECC block data based on the position of the ECC block data recognized by receiving the sector number and the sync frame number and receiving the area number; ; If there is an error in the ECC block data, correct this error. Error correction method comprising a. 12. The method of claim 11, wherein the ECC block data is based on 32 sectors when the ECC block data is based on the second standard, and when the ECC block data is based on the first standard, the ECC block data is 16 sectors, error correction method. 12. The method of claim 11, wherein the first half of the frame and the row number are identified and supplied from the sector number and the sync frame number. The method of claim 11, wherein in the conversion step, Receiving the sector number and the sync frame number, converting the first half late identifier and the row number and outputting the same; Receiving the sector number and the sync frame number, converting the first half late identifier, the row number, and the area number, and outputting the same; And receiving these outputs, selecting an output of the first half when the identification signal indicates the first standard, and selecting and supplying an output of the second half when the identification signal indicates the second standard. The method of claim 11, wherein in the conversion step, And receiving the sector number and the sync frame number, converting the first half half identifier and the row number, and converting the area number if the area number is possible, and outputting the area number. 12. The method according to claim 11, wherein in the correcting step, if it is determined that there is a missing portion in the ECC block data based on the sector number and the sync frame number, the missing portion when storing the ECC block data in the storage area 26. And storing the ECC block data sequentially as a blank area. 12. The error correction method according to claim 11, wherein in the determining step, the calculation result of the error correction code included in the ECC block is classified according to the area number and stored in a storage area. Reading data stored in the disk and outputting a read signal; Demodulating the read signal to output ECC block data, a sector number, and a sync frame number; Based on the read signal, the disc is based on a first standard to which a region containing a first feature A is assigned, or a recording density is higher than that of the first standard, and the first feature A and the first one. Outputting an identification signal by identifying whether the area including the second feature B corresponding to the first feature A is based on the given second standard; Receiving the identification signal, the ECC block data, the sector number and the sync frame number, and when the identification signal indicates the second standard, the area number (A, B) of the frame from the sector number and the sync frame number Outputting the equivalent); Determining an error presence by calculating an error correction code included in the ECC block data based on the position of the ECC block data recognized by receiving the sector number and the sync frame number and receiving the area number; ; If it is determined that there is an error in ECC block data, reproducing the data on the disc by correcting the error. Disc playback method comprising a. 19. The disc reproducing method according to claim 18, wherein the disc is identified whether the disc is based on the first standard or the second standard based on identification information of a management area of the disc included in the read signal. 19. The apparatus according to claim 18, wherein the stored data is read by a red laser for the disc based on the first standard, and the stored data is read by a blue laser for the disc based on the second standard. Disc playback method.

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