NDLI: Speech decoding with error concealment using residual source redundancy

Content Provider	IEEE Xplore Digital Library
Author	Fingscheidt, T. Vary, P.
Copyright Year	1997
Description	Author affiliation: Inst. of Commun. Syst. & Data Process., Tech. Univ. Aachen, Germany (Fingscheidt, T.)
Abstract	In digital mobile communication systems there is a need for error concealment techniques to reduce the subjective effects of residual bit errors which have not been eliminated by channel decoding. This contribution presents a new approach for optimum estimation of speech codec parameters. It can be applied to any speech codec standard if reliability information about the channel decoded bits is available (e.g., soft-output Viterbi algorithm-SOVA). The proposed method exploits the residual source redundancy and includes an inherent muting mechanism leading to a graceful degradation of speech quality in case of adverse transmission conditions. In the case of an error free channel, bit exactness as required by the standards can be preserved. This approach is applied here to the GSM full rate codec.
Starting Page	91
Ending Page	92
File Size	236479
Page Count	2
File Format	PDF
ISBN	0780340736
DOI	10.1109/SCFT.1997.623911
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1997-09-07
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Decoding Redundancy Speech codecs Computer errors Viterbi algorithm Interleaved codes Data processing Mobile communication Code standards Degradation
Content Type	Text
Resource Type	Article

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