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作者:

Jia, Mao-Shen (Jia, Mao-Shen.) | Bao, Chang-Chun (Bao, Chang-Chun.) (学者:鲍长春) | Liu, Xin (Liu, Xin.) | Li, Xiao-Ming (Li, Xiao-Ming.) | Li, Ru-Wei (Li, Ru-Wei.)

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EI Scopus

摘要:

In this paper a compressive sampling method of MLT coefficients which is used for extracting stereo information is adopted based on principal component analysis (PCA) and Modulated Lapped Transform (MLT). With this method, an embedded variable bit-rates stereo speech and audio coding algorithm is proposed in this paper. In this codec, the stereo signal sampled at 32 kHz and 16 kHz can be coded in terms of scalable bit rates, the structure of bit-stream is embedded and the bit-stream can be divided into several layers. The core codec is ITU-T G.729.1 which can process mono signal with 7 kHz bandwidth. Besides there are four extra bit-rates added include 40, 48, 56, and 64kb/s. The maximum bit-rates of wideband stereo signal and super-wideband stereo signal are 48kb/s and 64kb/s, respectively. The objective and subjective test results show that the quality of the proposed codec is no worse than the reference codec which is requested by ITU-T. © 2011 IEEE.

关键词:

Audio signal processing Binary sequences Codes (symbols) Principal component analysis Speech coding

作者机构:

  • [ 1 ] [Jia, Mao-Shen]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [Bao, Chang-Chun]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 3 ] [Liu, Xin]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 4 ] [Li, Xiao-Ming]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China
  • [ 5 ] [Li, Ru-Wei]Speech and Audio Signal Processing Lab., School of Electronic Information and Control Engineering, Beijing University of Technology, Beijing 100124, China

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年份: 2011

页码: 321-325

语种: 英文

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SCOPUS被引频次: 1

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