Multiple-description coding of logarithmic PCM

Author

Cluver, Kai ; Sikora, Thomas

Author_Institution

Commun. Syst. Group, Tech. Univ. Berlin, Berlin, Germany

fYear

2005

fDate

4-8 Sept. 2005

Firstpage

1

Lastpage

4

Abstract

A practical approach for the design of multiple-description scalar quantization of speech is presented that conforms to standard G.711 PCM. The method chiefly consists of an index assignment algorithm that enables the side decoders to exhibit SNR characteristics comparable to those of the standard logarithmic quantizer. With two-channel transmission of multiple descriptions, an increase in robustness to lossy channels is obtained without violation of the standard coding method. The method found is suitable for the design of multiple descriptions of any given scalar quantizer, e. g. one within a complex speech coder.

Keywords

channel coding; pulse code modulation; vocoders; SNR characteristics; complex speech coder; index assignment algorithm; logarithmic PCM; lossy channels; multiple-description coding; practical approach; side decoders; speech multiple-description scalar quantization approach; standard G.711 PCM; standard coding method; standard logarithmic quantizer; two-channel transmission; Decoding; Indexes; Phase change materials; Signal to noise ratio; Speech; Speech coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Conference, 2005 13th European

Conference_Location

Antalya

Print_ISBN

978-160-4238-21-1

Type

conf

Filename

7078328