Bandwidth extension of G.729 speech coder using search-free codebook mapping

Author

Youngwoo Kwon ; Yaxing Li ; Sangwon Kang

Author_Institution

Dept. of Electron. & Commun. Eng., Hanyang Univ., Ansan, South Korea

fYear

2012

fDate

3-4 July 2012

Firstpage

437

Lastpage

440

Abstract

A search-free codebook mapping algorithm for bandwidth extension in G.729 compressed domain is introduced in this paper. We design a wideband line spectrum pair (LSP) codebook which is coupled with the same index as the LSP codebook of the G.729 speech codec. The received narrowband LSP codebook indices are used to directly induce wideband LSP codewords. Thus, the proposed scheme eliminates codebook search processing to estimate the wideband spectrum envelope. Its performance was assessed via the perceptual evaluation of speech quality (PESQ), spectral distortion (SD), informal listening tests, and weighted million operations per second (WMOPS) calculations.

Keywords

speech enhancement; vocoders; G.729 speech coder; informal listening tests; search-free codebook mapping algorithm; spectral distortion; speech enhancement; speech quality perceptual evaluation; weighted million operations per second calculations; wideband line spectrum pair codebook; Decoding; Narrowband; Speech; Speech coding; Vectors; Wideband; Artificial bandwidth extension; Codebook mapping; G.729; Speech enhancement;

fLanguage

English

Publisher

ieee

Conference_Titel

Telecommunications and Signal Processing (TSP), 2012 35th International Conference on

Conference_Location

Prague

Print_ISBN

978-1-4673-1117-5

Type

conf

DOI

10.1109/TSP.2012.6256331

Filename

6256331