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Method of adding circular test bit before coding Turbo product code

A cyclic check and product code technology, applied in the field of signal transmission, can solve problems such as misjudgment, improve decoding quality, improve transmission reliability, and save decoding time.

Inactive Publication Date: 2006-10-25
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods have their own shortcomings, and the probability of misjudgment is relatively high.

Method used

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  • Method of adding circular test bit before coding Turbo product code
  • Method of adding circular test bit before coding Turbo product code

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and examples.

[0016] figure 1 It shows the method of the present invention to add CRC check bit to the first TPC coded block, figure 2 It shows the method of adding CRC check bits to the second TPC coded block in the present invention. figure 1 and figure 2 The two TPC coding blocks in constitute a CRC checking unit of the method of the present invention.

[0017] exist figure 1 and figure 2 In the illustrated embodiment, the TPC encoding adopts two-dimensional TPC (128, 120; 128, 120) encoding, that is, the TPC encoding input matrix with 120 rows and 120 columns is subjected to extended Hamming encoding to form a TPC encoding output with 128 rows and 128 columns matrix.

[0018] Such as figure 1 and figure 2 Shown, the data block TPC (120 * 120) before 2 TPC encodings comprises the MPEG-II bag in 19 MPEG-II TS flows altogether, and the method that the prese...

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Abstract

The invention discloses a method for adding a cyclic check bit before encoding a Turbo product code. In this method, 8-bit CRC check and 32-bit CRC check are performed with every two TPC data blocks before TPC encoding as a check unit. Each check unit contains 19 TS packets in the MPEG-II TS stream, and the CRC check is performed on the first 9 half TS packets of the first TPC block and the last 9 half TS packets of the second TPC block. At the receiving end, you can know whether the data is wrong according to the parity bit, so as to decide whether TPC decoding error correction is needed, thereby greatly improving the decoding quality and saving decoding time, and can also provide more reliable error concealment for MPEG II decoding information.

Description

technical field [0001] The invention belongs to the field of signal transmission, in particular to a method for adding a cyclic check bit before encoding a Turbo product code. Background technique [0002] The terrestrial wireless transmission channel is a very complex transmission channel, whether it is fixed reception or mobile reception, it is faced with serious multipath interference and other fading factors. Therefore, after the signal is transmitted through the channel, code errors will inevitably occur. In order to ensure the correctness of the transmission process, it is necessary to control the error in the communication process. Before restoring the image, these possible error codes must be corrected, and the channel error correction codec using forward error correction (FEC) is one of the more effective means. Channel coding actually ensures reliable data transmission by adding certain redundant information as auxiliary information for transmission to combat cha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03M13/00H03M13/23H04L1/00
Inventor 归琳管云峰熊箭梁伟强孙军
Owner SHANGHAI JIAO TONG UNIV