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학술지 A Low Power Bandwidth Extension Technique
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저자
윤병식, 박희완, 강상원
발행일
201201
출처
IEICE Transactions on Communications, v.E-95-B no.1, pp.358-361
ISSN
0916-8516
출판사
일본, 전자정보통신학회 (IEICE)
DOI
https://dx.doi.org/10.1587/transcom.E95.B.358
협약과제
10MI2300, WiBro 네트워크 신뢰성 확보 및 위치 인지 기술 개발, 안지환
초록
This paper proposes a low power artificial bandwidth extension (ABE) technique that reduces computational complexity by introducing a fast codebook mapping method. We also introduce a weighted classified codebook mapping method for constructing the spectral envelope of the wideband speech signal. Classified codebooks are used to reduce spectrum mapping errors caused by characteristic difference among voiced, unvoiced and onset sound. The weighted distortion measure is also used to handle the spectral sensibility. The performance of the proposed ABE system is evaluated by a spectral distortion (SD), a perceptual evaluation of speech quality (PESQ), informal listening tests and weighted million operations per second (WMOPS) calculations. With the use of fast codebook mapping, the WMOPS complexity of the codebook mapping module is reduced by 45.17%. Copyright © 2012 The Institute of Electronics, Information and Communication Engineers.
키워드
Artificial bandwidth extension, Codebook mapping, Speech enhancement
KSP 제안 키워드
Computational complexity, Information and communication, Low-Power, Mapping method, Spectral distortion, Speech Signal, artificial bandwidth extension, distortion measure, listening tests, perceptual evaluation of speech quality, power bandwidth