An ATM speech codec with improved reconstruction of lost cells

A speech codec for ATM networks is presented which includes ATM adaptation layer functions, a voice activity detection, and a new method for the reconstruction of lost cells. As the cell assembly already requires a relatively high buffering delay, only algorithms are applied which introduce small ad...

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Bibliographic Details
Published in1996 8th European Signal Processing Conference (EUSIPCO 1996) pp. 1 - 3
Main Author Cluver, Kai
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.1996
Subjects
Asynchronous transfer mode
Decoding
Delays
Low-pass filters
Reconstruction algorithms
Speech codecs
Speech coding
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Summary:A speech codec for ATM networks is presented which includes ATM adaptation layer functions, a voice activity detection, and a new method for the reconstruction of lost cells. As the cell assembly already requires a relatively high buffering delay, only algorithms are applied which introduce small additional delays. The reconstruction of lost cells is based on an analysis of the LPC and pitch parameters of the speech signal. The new waveform substitution method considerably reduces the speech quality impairment caused by cell loss.
ISBN:8886179839
9788886179836