Improving transcoding capability of speech coders in clean and frame erasured channel environments

Author

Kang, Hong-Goo ; Kim, Hong Kook ; Cox, Richard V.

Author_Institution

SIPS, AT&T Labs.-Res., Florham Park, NJ, USA

fYear

2000

fDate

2000

Firstpage

78

Lastpage

80

Abstract

With the trend of merging various networks, a need arises to provide transcoding between different speech coding formats. Presently this means cross tandeming the two coders, but it results in both quality loss and extra delay. A possible alternative is using a bit-stream mapping approach that directly converts parameter values. This paper proposes a bit-stream mapping method between ITU-T Recommendation G.729 and TIA IS-641. Informal listening tests and PSQM scores show that the proposed method has better quality than the cross tandeming method in both clean and frame erased channel environments

Keywords

delays; speech coding; speech intelligibility; telecommunication channels; vocoders; ITU-T Recommendation G.729; PSQM scores; TIA IS-641; bit-stream mapping; clean channel environment; cross tandeming method; delay; error concealment; frame erasured channel environment; informal listening tests; speech coders; speech coding formats; speech quality; transcoding; Code standards; Delay; Merging; Quantization; Speech analysis; Speech coding; Standards development; Testing; Transcoding; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Speech Coding, 2000. Proceedings. 2000 IEEE Workshop on

Conference_Location

Delavan, WI

Print_ISBN

0-7803-6416-3

Type

conf

DOI

10.1109/SCFT.2000.878403

Filename

878403