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학술지 Search-Free Codebook Mapping for Artificial Bandwidth Extension
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저자
박희완, 윤병식, 강상원, Adreas Spanias
발행일
201204
출처
IEICE Transactions on Communications, v.E95-B no.4, pp.1479-1482
ISSN
0916-8516
출판사
일본, 전자정보통신학회 (IEICE)
DOI
https://dx.doi.org/10.1587/transcom.E95.B.1479
협약과제
10MI2300, WiBro 네트워크 신뢰성 확보 및 위치 인지 기술 개발, 안지환
초록
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.
키워드
AMR, Artificial bandwidth extension, Codebook mapping, Speech enhancement
KSP 제안 키워드
Codebook search, Compressed Domain, Coupled with, Information and communication, Line spectrum, Mapping algorithm, Multi-rate, Spectrum envelope, Wideband spectrum, artificial bandwidth extension, listening tests