Bandwidth Extension of G.729 Speech Coder using Search-free Codebook Mapping

被引：0
|
作者：
Kwon, Youngwoo [1 ]
Li, Yaxing [1 ]
Kang, Sangwon [1 ]
机构：
[1] Hanyang Univ, Dept Elect & Commun Engn, Seoul, South Korea
来源：
2012 35TH INTERNATIONAL CONFERENCE ON TELECOMMUNICATIONS AND SIGNAL PROCESSING (TSP) | 2012年
关键词：
Artificial bandwidth extension; Codebook mapping; G.729; Speech enhancement;
D O I：
暂无
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
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收藏
页码：437 / 440
页数：4
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