SNR and bandwidth scalable speech coding

Author

Dong, Hui ; Gibson, Jerry D. ; Kokes, Mark G.

Author_Institution

Dept. of Electr. Eng., Southern Methodist Univ., Dallas, TX, USA

Volume

2

fYear

2002

fDate

2002

Abstract

Bitrate scalability in speech coders can be used to achieve SNR scalable speech coding or bandwidth scalable coding of speech and audio. Depending upon the base layer bandwidth and base layer speech coder, several different scalable speech and audio coding structures have been investigated. We present a taxonomy of scalable speech coding structures and describe the advantages and disadvantages of each. We introduce an SNR scalable coder for noisy speech and propose the use of bandwidth scalable coders for rate switching in wireless environments. In addition, we develop a bandwidth scalable structure that is built around adaptive multirate speech coders

Keywords

adaptive codes; audio coding; data compression; linear predictive coding; noise; speech coding; vocoders; CELP; SNR scalable speech coding; adaptive multirate speech coders; audio coding; bandwidth scalable speech coding; base layer bandwidth; base layer speech coder; bitrate scalability; code-excited linear prediction; noisy speech; rate switching; wireless environments; Bandwidth; Code standards; Codecs; Decoding; Multimedia communication; Narrowband; Scalability; Speech coding; Taxonomy; Wideband;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on

Conference_Location

Phoenix-Scottsdale, AZ

Print_ISBN

0-7803-7448-7

Type

conf

DOI

10.1109/ISCAS.2002.1011489

Filename

1011489