Method and apparatus for encoding and decoding data with error correction

An error correction coding and data technology, applied in the field of data error correction

Inactive Publication Date: 2009-07-15
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This technical solution uses a single RS code for all data information, but if it is necessary to reduce the RS error correction redundant information, then when forming a data packet, only the error correction information of the information data with higher importance is kept, and the important One or more error correction messages generated by less reliable information data will be ignored

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  • Method and apparatus for encoding and decoding data with error correction
  • Method and apparatus for encoding and decoding data with error correction
  • Method and apparatus for encoding and decoding data with error correction

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Embodiment Construction

[0026] The idea of ​​the present invention is as follows: in a data packet of a video stream, if the sum of data errors exceeds the maximum allowable error amount of the Reed-Solomon error correction method, then the data packet will be discarded. The discarded data packets may include both general data (such as image data) and important data (such as header information data). Even if important data itself has no errors or few errors, it may be discarded because the sum of errors with general data exceeds the limit value. In order to prevent important data from being affected by errors in general data, the present invention limits the number of bits of information data in a data packet to a smaller number, which is only used to fill important information such as header information, while other data bits in the data packet is filled with non-informative data. Because when the video data stream is channel-decoded, the data without information will be corrected into error-free d...

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Abstract

The invention provides a method and apparatus for encoding and decoding data with error correction. In a data packet of a video stream, important data may be discarded because the total number of errors of important data and normal data exceeds a limit, even though important data itself has no or little error. To avoid that important data is influenced by errors of normal data, a data packet with important data being as information data is generated by the invention, and other data bits in the data packet are filled with non- information data. When decoding the video data stream, non-information data is firstly recovered to the data with no error. Therefore the important data can be error corrected and will not be discarded if the number of errors of important data itself does not exceed a specific error number limit, thereby increasing the error correction ability to the important data.

Description

technical field [0001] The invention relates to the field of data error correction, in particular to a method and device for performing error correction encoding and error correction decoding on data. Background technique [0002] In the development of digital TV and optical storage technology, in order to meet different technical needs, many low-bit-rate, high-quality digital codec technology standards have emerged, but data errors in the process of digital coding, transmission and decoding are still unavoidable. Therefore, many data error correction methods are accompanied. [0003] Bit errors in video streams mainly occur during data storage and transmission. The occurrence of data errors often leads to out-of-synchronization of audio and video stream data, thereby affecting the decoding and playback of video stream programs. Reed-Solomon (RS code, Reed-Solomon) error correction code is a data error correction scheme widely used in data storage and transmission. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/24H04N7/66H04N7/64H04N19/89
CPCH04N19/00854H04N21/2383H04N19/0086H04N21/238H03M13/1515H03M13/15H04N21/84H04N21/4382H04N19/00933H04N21/234327H04N7/64H04N7/66H04N21/23611H04N21/4425H04N19/65H04N19/66H04N19/89
Inventor 王进
Owner KONINK PHILIPS ELECTRONICS NV
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