8～64kbit/s super-wideband embedded speech and audio coding algorithm

JIA Mao-shen; BAO Chang-chun; LI Rui

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8～64kbit/s super-wideband embedded speech and audio coding algorithm

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- 8～64kbit/s super-wideband embedded speech and audio coding algorithm
- Vol. 30, Issue 5, Pages: 27-34(2009)
- 作者机构：
  
  北京工业大学电子信息与控制工程学院语音与音频信号处理研究室
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN912.3
- Published：2009
- 稿件说明：
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JIA Mao-shen, BAO Chang-chun, LI Rui. 8～64kbit/s super-wideband embedded speech and audio coding algorithm[J]. 2009, 30(5): 27-34.
DOI：

JIA Mao-shen, BAO Chang-chun, LI Rui. 8～64kbit/s super-wideband embedded speech and audio coding algorithm[J]. 2009, 30(5): 27-34. DOI：

摘要

基于国际电信联盟标准化组织（ITU-T）编码标准G.729.1和改进的调制叠接变换（MLT

modulated lapped transform）编码技术

提出了一种码率在8

4kbit/s的超宽带嵌入式变速率语音与音频编码方法

其中

2kbit/s码率的码流由G.729.1编码算法生成

编码信号为0

kHz频段的信息;36、40和48kbit/s码率层及56、64kbit/s码率层码流由MLT变换编码方式生成

编码信号分别为7

4kHz频段的信息和G.729.1编码残差的MDCT信息。客观和主观听力测试表明本编码器的性能达到了ITU-T提出的参考指标要求。

Abstract

Based on the international telecommunication union telecommunication standardization sector （ITU-T） recommendation G.729.1 and modified modulated lapped transform （MLT） coding

a super-wideband embedded variable bit-rate speech and audio coding algorithm was proposed

the bit-rates of this codec was from 8kbit/s to 64kbit/s. The information in the frequencies of 0~7 kHz was encoded by G.729.1 codec at 8~32kbit/s

the information in the frequencies of 7~14 kHz was encoded by the transform coding at 36、40 and 48kbit/s

and G.729.1 residual signal’s MDCT （modified discrete cosine transform） was encoded by the transform coding at 56 and 64kbit/s. The objective and subjective listening tests show that this codec has good performance compared with Terms of Reference given by ITU-T.

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Related Author

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Related Institution

北京工业大学电子信息与控制工程学院语音与音频信号处理研究室

Speech and Audio Signal Processing Lab,School of Electronic Information and Control Engineering,Beijing University of Technology

Ningbo Key Lab. of DSP, Zhejiang Wanli University

Physical Engineering College,Zhengzhou University

School of Electronic Information and Control Engineering,Beijing University of Technology

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