Sony Corporation

Kazuhiro Yasuda

Takahiro Ichikawa

Shigeharu Sato

Satoru Kimura

Takashi Okada

Tsuneo Hayashi

Kazutoshi Shimizume

Shozo Masuda

Tadashi Nakata

A readout controlling apparatus for controlling reading conditions at the time of reading data coded in units of predetermined code blocks from a recording medium capable of performing error correction at a high reliability even when the playback conditions are poor by calculating an error rate using the number of bytes for which outer code error correction has been completed etc. in the error correction in an error corrector and controlling the reading conditions so that the error rate becomes small.

Readout controlling apparatus, reproducing apparatus, recording apparatus, and readout controlling method

An error correction apparatus comprises a buffer memory for successively storing ECC error correction blocks included in the reproducing signal read from the optical disk in units of a row including a corresponding inner code parity, and an error correction means for successively performing an error correction on the read row by reading the column of information data stored in a buffer memory and said inner code parity corresponding to the column from among the ECC error correction block and using the read inner code parity in parallel with processing for storing the remaining data forming the ECC error correction block at a timing before all of data constituting the ECC error correction block is stored in the buffer memory.

Error correction apparatus and disk player using the same

A data decoding apparatus and the method and a data reproduction apparatus which reduces capacity of a memory used for decoding and speedily accesses to data to be read. In a data decoding apparatus ( ) and the method which decodes coded data (S ) which is recorded in a recording medium ( ), the coded data (S ) read from the recording medium ( ) is stored in a memory used for decoding ( ), data information of data to be read is detected from decoded data which is generated in the middle of decoding the coded data (S ), the data information is stored in a data information storage means and the output of decoded data (S ) is controlled on the based on the data information, thereby the output of the decoded data (S ) is controlled based on the data information independent of decoding of the coded data (S ).

Data decoding apparatus and method and data reproduction apparatus

A data decoding apparatus and the method and a data reproduction apparatus which reduces capacity of a memory used for decoding and speedily accesses to data to be read. In a data decoding apparatus (50) and the method which decodes coded data (S2) which is recorded in a recording medium (2), the coded data (S2) read from the recording medium (2) is stored in a memory used for decoding (51), data information of data to be read is detected from decoded data which is generated in the middle of decoding the coded data (S2), the data information is stored in a data information storage means and the output of decoded data (S10) is controlled on the based on the data information, thereby the output of the decoded data (S10) is controlled based on the data information independent of decoding of the coded data (S2).

Decoding apparatus and method set interpolation flags in units smaller than an ECC block. The PI1 flag indicating an error on a row-by-row basis is generated for the first error correction result, while the PI2 flag also indicating an error on a row-by-row basis is generated for the second error correction result in the ECC block. The PO flag indicating an error on a column-by-column basis is further generated for the error correction result in the ECC block. Following these processing operations, the PI1, PI2 and PO flags are used for generating the interpolation flags.

Apparatus and method for decoding data using flags to indicate decoding

Error correction decoding apparatus decodes error correction encoded data reproduced from a recording medium by decoding the encoded data to produce decoded data in frame units and by generating decoding information in frame units; the decoded data and decoding information are stored in correspondence by frame unit and the decoded data and decoding information are retrieved from storage while frame synchronizing with address data representing a physical location of the encoded data on the recording medium.

Optical disk error-correcting code system correlating error correction

Q- or P-sequence error correction is suitable for correcting errors of data stored in a CD-ROM. Errors of data are corrected using a 2-word parity code added to the data and input pointers that have been set for the words that are presumed to be subjected to errors. Output pointers are set for respective words of data which are presumed not to be error-corrected completely.

Growing community of inventors

Kanagawa, Japan

Kazuhiro Yasuda