Enhanced waveform interpolative coding at low bit-rate

被引：12

作者：

Gottesman, O ^{[1
]}

Gersho, A ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA

来源：

IEEE TRANSACTIONS ON SPEECH AND AUDIO PROCESSING | 2001年 / 9卷 / 08期

基金：

美国国家科学基金会;

关键词：

analysis-by-synthesis; phase dispersion; speech coding; speech compression; vector quantization; waveform interpolation; waveform interpolative coding;

D O I：

10.1109/89.966082

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

This paper presents a high quality enhanced waveform interpolative (EWI) speech coder at low bit-rate. The system incorporates novel features such as optimization of the slowly evolving waveform (SEW) for interpolation, analysis-by-synthesis (AbS) vector quantization (VQ) of the SEW dispersion phase, dual-predictive AbS quantization of the SEW, efficient parameterization of the rapidly-evolving waveform (REW) magnitude, and VQ of the REW parameter, a special pitch search for transitions, and switched-predictive analysis-by-synthesis gain VQ. Subjective tests indicate that the 2.8 kb/s EWI coder's quality exceeds that of G.723.1 at 5.3 kb/s, and it is slightly better than that of G.723.1 at 6.3 kb/s.

引用

页码：786 / 798

页数：13

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