Pseudo product code coding and decoding equipment and method thereof

A decoding device and code technology, which is applied in the field of digital devices using pseudo-product codes, pseudo-product code encoding and decoding devices, and can solve problems such as poor error correction capability and inability to achieve error correction.

Inactive Publication Date: 2004-06-02
SONY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

refer to Figure 19 , Figure 17 Errors in the parity symbols in the C1 code in symbol group 223 are not corrected, although the C2 code is decoded to match the Figure 19 Different occasions, it is impossible to achieve error correction
Thus, the deco...

Method used

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  • Pseudo product code coding and decoding equipment and method thereof
  • Pseudo product code coding and decoding equipment and method thereof
  • Pseudo product code coding and decoding equipment and method thereof

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Embodiment Construction

[0058] Embodiments of the present invention are described in detail below. The invention may include, for example figure 1 Recording / playback equipment of the type indicated.

[0059] This recording / reproducing apparatus 1 comprises following parts: video signal encoder 2, it receives video signal; Error correction code encoder 3, it receives the video data through video encoding from video encoder 2; Recording / reproducing unit 4, It receives error-corrected video data from an error-correcting code encoder 3; an error-correcting code decoder 5, which receives video data reproduced from a magnetic tape 4a by a rotary head 4b in a recording / reproducing unit 4; and a video signal decoder 6, which receives the error-corrected video data from the error-correcting code decoder 5 to form a video signal output from the recording / playback device 1.

[0060] During the operation of the recording / reproducing apparatus 1, the video signal sent to the video signal encoder 2 is converted...

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Abstract

A pseudo product code decoding apparatus has the following units: a first error correction code decoding unit for effecting error correction by using parity symbols of a first linear-structure error correction code contained in an input symbol train that constitutes a pseudo product code codeword; a second error correction code decoding unit for effecting error correction by using parity symbols of a second linear-structure error correction code; a second-series information symbol extracting unit for extracting second-series information symbols; a subtraction code generating unit for generating a subtraction code of a pseudo product code codeword formed of the second-series information symbols, with the first-series information symbol portion and the second linear-structure error correction code portion being changed to zero codes; a transforming unit for transforming the pseudo product code codeword into a product code codeword through execution of subtracting processing with the subtraction code; an error correction code repetitive decoding unit for effecting decoding processings a plurality of times, thereby effecting error correction; and a first-series information symbol extracting unit for extracting the first-series information symbols.

Description

technical field [0001] The present invention relates to an apparatus and method for encoding and decoding pseudo-product codes, which are suitable for use in digital devices using pseudo-product codes, such as digital video tape recorders, digital audio recorders, digital communication devices, and the like. More particularly, the present invention relates to a pseudo-product code encoding and decoding apparatus and method in which after converting a pseudo-product code into a product code, a decoding process is performed in order to improve error correction capability. Background technique [0002] In recent years, recording / reproducing apparatuses such as digital video tape recorders and digital sound recorders have come into use, which digitally process input video signals and audio signals, and record the resulting digital signals. [0003] refer to Figure 15 A typical existing recording / reproducing apparatus 200 of the type described above includes a video signal code ...

Claims

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Application Information

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IPC IPC(8): G11B20/18H03M13/00H03M13/27H03M13/29
CPCH03M13/2906H03M13/27H03M13/31
Inventor 服部雅之山本耕平
Owner SONY CORP
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