Proceedings Article10.1109/ICASSP.2005.1415067
A multiple-description PCM speech coder using structured dual vector quantizers
S.D. Voran
- 18 Mar 2005
- Vol. 1, pp 129-132
10
TL;DR: A 2-channel multiple-description speech coder based on the ITU-T recommendation G.711 PCMspeech coder that applies a pair of 2D structured vector quantizers to each pair of PCM codes, thus exploiting the correlation between adjacent speech samples.
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Abstract: In this paper, we describe a 2-channel multiple-description speech coder based on the ITU-T recommendation G.711 PCM speech coder. The new coder operates in the PCM code domain in order to exploit the companding gain of PCM. It applies a pair of 2D structured vector quantizers to each pair of PCM codes, thus exploiting the correlation between adjacent speech samples. If both quantizer outputs are received, they are combined to generate an approximation to the original pair of PCM codes. If only one quantizer output is received, a coarser approximation is still possible. When using 6 bits/sample/channel (for a total data rate of 96 kbps) the coder provides an equivalent PCM speech quality of 7.3 bits/sample when both channels are working and 6.4 bits/sample when one channel is working.
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Citations
Multilple description coding for error-resilient video transmission
Mengyao Ma,Oscar C. Au,S.-H. Gary Chan +2 more
- 17 Aug 2005
TL;DR: Some MDC approaches are reviewed, categorized by the dimension of description sub-sampling; namely, spatial or temporal, while in temporal MDC, the video sequence is coded into multiple decodable streams, each with its own prediction process.
2
Multiple-description PCM speech coding by complementary asymmetric vector quantizers
S.D. Voran
- 07 Apr 2005
TL;DR: In this article, a 2-channel multiple-description speech coders based on the ITU-T recommendation G.711 PCM speech coder are proposed. But the authors do not consider the effect of quantizer outputs on the quality of the output.
Multiple-Description Speech Coding Using Speech-Polarity Decomposition
Stephen D. Voran,Andrew Catellier +1 more
- 06 Dec 2010
TL;DR: A new multiple-description coding extension to the international standard for pulse code modulation speech coding (ITU-T Rec. G.711) is presented and evaluated, which uses speech-polarity decomposition to spread the speech signal across two channels thus increasing robustness to channel losses.
Multiple-description pcm speechcodingbycomplementary asymmetric vectorquantizers
Stephen D. Voran
- 01 Jan 2005
TL;DR: New 2-channel multiple-description speech coders based on the ITU-T recommendation G.711 PCM speech coder operate in the PCM code domain in order to exploit the companding gain of PCM.
References
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Multiple description perceptual audio coding with correlating transforms
TL;DR: In audio communication over a lossy packet network, concealment techniques are used to mitigate the effects of lost packets and are markedly improved if the compressed representation retains redundancy to aid in the estimation of lost information.
A multiple description speech coder based on AMR-WB for mobile ad hoc networks
Hui Dong,Allen Gersho,Jerry D. Gibson,V. Cuperman +3 more
- 17 May 2004
TL;DR: A new multiple description (MD) speech coder based on the AMR-WB standard that makes effective use of the channel capacity and provides reliable end-to-end connections for voice communication in MANETs is introduced.