SMVLite: Reduced Complexity Selectable Mode Vocoder

Author

Goudar, C.V. ; Rabha, Pankaj ; Deshpande, Murali ; Rao, Ajit

Volume

1

fYear

2006

fDate

14-19 May 2006

Abstract

This paper describes the recently developed SMVLite speech codec. SMVLite is the reduced complexity variant of the new 3GPP2 (3rd generation partnership project 2) CDMA standard SMV (selectable mode vocoder). SMV provides superior speech quality at low bit-rates compared to other CDMA codecs. However, its computational complexity is significantly higher than other CDMA standards, thereby rendering it inefficient for real-time implementation. We have developed a lower complexity version of the SMV called SMVLite. SMVLite is bit-stream interoperable with SMV and its voice quality is perceptually equivalent to SMV in all modes & conditions of interest. The computational complexity of SMVLite is 25% lower than SMV. The voice quality equivalence of SMV and SMVLite has been conclusively proven in a formal subjective listening test conducted at Dynastat

Keywords

computational complexity; speech codecs; speech coding; vocoders; 3GPP2; CDMA standard; SMVLite speech codec; computational complexity; reduced complexity selectable mode vocoder; speech quality; voice quality; Bandwidth; Code standards; Computational complexity; Costs; Instruments; Multiaccess communication; Next generation networking; Speech codecs; Testing; Vocoders;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660117

Filename

1660117