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Journal Article
Search-Free Codebook Mapping for Artificial Bandwidth Extension
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- Authors
- Heewan PARK, Byungsik YOON, Sangwon KANG, Andreas SPANIAS
- Issue Date
- 2012-04
- Citation
- IEICE Transactions on Communications, v.E95-B, no.4, pp.1479-1482
- ISSN
- 0916-8516
- Publisher
- 일본, 전자정보통신학회 (IEICE)
- Language
- English
- Type
- Journal Article
- Abstract
- A new codebook mapping algorithm for artificial bandwidth extension (ABE) 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 a narrowband 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. We apply the proposed scheme to bandwidth extension in adaptive multi-rate (AMR) compressed domain. Its performance is assessed via the perceptual evaluation of speech quality (PESQ), informal listening tests, and weighted million operations per second (WMOPS) calculations. © 2012 The Institute of Electronics, Information and Communication Engineers.
- KSP Keywords
- Codebook search, Compressed Domain, Coupled with, Information and communication, Line spectrum, Mapping algorithm, Multi-rate, Spectrum envelope, Wideband spectrum, artificial bandwidth extension, listening tests