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Journal Article
A Low Power Bandwidth Extension Technique
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- Authors
- Byungsik YOON, Heewan PARK, Sangwon KANG
- Issue Date
- 2012-01
- Citation
- IEICE Transactions on Communications, v.E-95-B, no.1, pp.358-361
- ISSN
- 0916-8516
- Publisher
- 일본, 전자정보통신학회 (IEICE)
- Language
- English
- Type
- Journal Article
- Abstract
- 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.
- KSP Keywords
- Computational complexity, Information and communication, Low-Power, Mapping method, Spectral distortion, Speech Signals, artificial bandwidth extension, distortion measure, listening tests, perceptual evaluation of speech quality, power bandwidth