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Coding method and apparatus for cross cyclic code

A coding method and coding technology, applied in the coding field

Inactive Publication Date: 2008-06-04
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Taking the CIRC RS(28, 24) of the optical disc specification as an example, it has a total of 24 data symbols and finally hopes to generate 4 parity codes. The existing CIRC encoding method requires a total of 255 computing cycles

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  • Coding method and apparatus for cross cyclic code
  • Coding method and apparatus for cross cyclic code
  • Coding method and apparatus for cross cyclic code

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Embodiment Construction

[0019] see figure 1 , figure 1 It is used to illustrate the encoding method of the present invention. The encoding method of the present invention is used to encode a codeword (codeword) 30 to obtain a corresponding parity code (paritycode) 32 . Such as figure 1 As shown, in the embodiment, the codeword 30 is encoded by a cross interleaved Reed-Solomon cyclic code (CIRC) encoding method used for optical discs. The parity code 32 is placed in the codeword 30 and separates the codeword 30 to form a first set of data symbols 34 and a second set of data symbols 36 (a first and a second set of data symbols). The first group of data symbols 34 and the second group of data symbols 36 respectively include 12 data symbols, and the parity code 32 includes 4 data symbols.

[0020] Each data symbol forms a coefficient. The coefficient corresponding to the first group of data symbols 34 is m 23 、m 22 、m 21 ,...,m 12 ; The coefficient corresponding to the second group of data symbo...

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Abstract

This invention refers to a method for obtaining parity check code by coding coded word, said parity check code is set in coded word and separating it for forming at least the first and second data code element each of them forming a coefficient, the first and second data code element and parity check code respectively form the first polynomial, the second polynomial and parity check code polynomial, the other polynomial such as the first code generating polynomial, second code generating polynomial and third polynomial also can be generated by definite sequence in order to obtain said parity check code.

Description

technical field [0001] The present invention relates to a coding method, in particular to a coding method of a cross interleaved Reed-Solomon cyclic code (CIRC). Background technique [0002] Among the encoding methods of existing data recording systems, there are many methods for encoding codewords to obtain corresponding parity check codes. A codeword contains a plurality of data symbols. The existing encoding method is to place the parity code at the end of these data symbols, and the encoding operation is quite complicated and time-consuming. The CIRC encoding method puts parity codes in these data symbols, and its encoding operation is relatively simplified and time-saving. Taking the CIRC RS(28, 24) of the CD standard as an example, it has a total of 24 data symbols and it is desired to generate 4 parity codes at last. The existing CIRC encoding method requires a total of 255 operation cycles. [0003] In the existing encoding method or encoding system, there is sti...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/15
Inventor 胡逸光杨金彬张锡嘉
Owner MEDIATEK INC