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Channel decoding method, system and device

A channel decoding, channel technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as inaccurate measurement values

Active Publication Date: 2014-05-07
HUAWEI TECH CO LTD
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AI Technical Summary

Problems solved by technology

[0005] When calculating the measured value of the corresponding parameter value according to the channel decoding soft value, the corresponding relationship between the stored bit soft information and its error probability is to find the measured value of each bit in the channel decoding soft value, thereby obtaining the parameter It is very inaccurate to obtain the measured value of the parameter value only based on the corresponding relationship

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  • Channel decoding method, system and device
  • Channel decoding method, system and device
  • Channel decoding method, system and device

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Embodiment Construction

[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0043] An embodiment of the present invention provides a channel decoding method, the flow chart is as follows figure 1 As shown, can include:

[0044] Step 101, acquire the channel decoding soft value of the received signal frame;

[0045] The method of the embodiment of the present invention can be applied to CELP-based speech signal decoding process, such as enhanced full rate speech coding (Enhanced Full Rate speech codec, EFR) signal and adaptive multi-rate s...

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Abstract

The embodiment of the present invention discloses a channel decoding method, system and device which are used in the technical field of communications. The channel decoding method in the embodiment of the present invention comprises the following steps: obtaining the channel decoding soft value of a received signal frame; when determining that at least one voice coding parameter in the channel decoding soft value needs to be corrected, correspondingly correcting the voice coding parameter which is determined to be corrected, storing the corrected voice coding parameter as a channel decoding result and then outputting it. In this manner, after the channel decoding, each voice coding parameter of the decoding result after correction can correspond to the respective attribute feature and has less influence on the voice signals, and therefore the accuracy of the decoding result is increased.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a channel decoding method, system and device. Background technique [0002] In general, the receiving end of the current communication system is independent in channel decoding and source coding, so the error rate of channel decoding is relatively high. For example, in Code-Excited Linear Predictive Coding (Code-Excited Linear Predictive Coding, The adaptive codebook index (AI) parameter obtained by CELP) changes slowly in most cases. If the decoding value of the AI ​​parameter obtained by channel decoding changes greatly compared with the previous decoding value, then the error The possibility is very high. The source-channel joint decoding method synthesizes the information of both the channel and the source to make appropriate decoding, which improves the accuracy of channel decoding. [0003] The existing information source channel decoding method uses a cert...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/0045
Inventor 朱佥唐欣李明刘小青
Owner HUAWEI TECH CO LTD