TRELLIS EXCITATION SPEECH CODING AT LOW BIT RATES

被引：1

作者：

KANG, SW ^{[1
]}

FISCHER, TR ^{[1
]}

机构：

[1] WASHINGTON STATE UNIV, SCH ELECT ENGN & COMP SCI, DEPT ELECT & COMP ENGN, PULLMAN, WA 99164 USA

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 1994年 / 42卷 / 2-4期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/TCOMM.1994.582900

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：

Trellis coded vector quantization (TCVQ) and code-excited linear prediction (CELP) coding are combined to form an efficient low-bit rate speech coding system. The resulting system uses a trellis search to select the synthesis filter excitation sequence, and is referred to as trellis excitation coding (TEC). Simulations are performed for encoding rates of 6.4 and 8 kbps. Informal listening tests indicate that the 8 kbps TEC system has quality roughly between that of 6-bit and 7-bit mu-law PCM with mu = 255. The 6.4 kbps TEC system provides speech quality between 5-bit and 6-bit mu-law PCM. A subjective comparison with vector sum excited linear prediction (VSELP) indicates that the 8 kbps TEC and the VSELP reconstructed speech is about equally preferable.

引用

页码：1902 / 1910

页数：9

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