Analysis-by-synthesis voicing cut-off determination in harmonic coding

被引：0

作者：

Jia, WH ^{[1
]}

Chan, WY ^{[1
]}

机构：

[1] Brooktrout Technol, Los Gatos, CA 95032 USA

来源：

2000 IEEE WORKSHOP ON SPEECH CODING, PROCEEDINGS: MEETING THE CHALLENGES OF THE NEW MILLENNIUM | 2000年

关键词：

D O I：

10.1109/SCFT.2000.878397

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In low bit-rate harmonic speech coding, voicing information is often specified by a cut-off frequency of the spectrum. Many approaches of cut-off estimation depend on spectral matching, where a fixed prototype spectrum is used to model voiced harmonics. However, voiced harmonics do not always show a regular shape. One of the causes is harmonic interference. We propose an analysis-by-synthesis voicing cut-off determination scheme that takes into account harmonic interactions in spectral-matching. The proposed scheme has been embedded in a 2.4 kb/s harmonic coder. Subjective listening tests show that the scheme performs well and is robust against noise.

引用

页码：65 / 67

页数：3

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