An embedded variable bit-rate audio coder for ubiquitous speech communications

被引：0

作者：

Kim, Do Young ^{[1
]}

Park, Jong Won ^{[2
]}

机构：

[1] Elect & Telecommun Res Inst, Multimedia Commun Team, 161 Gajeong Dong, Taejon 305700, South Korea

[2] Chungnam Natl Univ, Dept Informat Commun Engn, Taejon 305764, South Korea

来源：

UBIQUITOUS CONVERGENCE TECHNOLOGY | 2007年 / 4412卷

关键词：

embedded coder; G.729EV; MOS; PESQ-WB; scalable audio coder; ubiquitous audio;

D O I：

暂无

中图分类号：

TP301 [理论、方法];

学科分类号：

081202 ;

摘要：

In this paper, we propose an embedded variable bit-rate (VBR) audio coder to provide the fittest quality of service (QoS) and better connectivity of service for the ubiquitous speech communications. It has scalable bandwidth for narrowband to wideband speech signal, and embedded 8 32 kbit/s VBR corresponding to the network condition and terminal capacity. For the design of the embedded VBR coder, the narrowband signals are compressed by an existing standard speech coding method for the compatibility with G.729 coder, and then the other signals are compressed hierarchically on the basis of CELP enhancement and transform coding with temporal noise shaping (TNS) method. By the objective and subjective quality tests, it is shown that the proposed embedded VBR audio coder provides a reasonable quality compared with existing audio coders such as G.722 and G.722.2 in terms of mean opinion score (MOS) and perceptual evaluation of speech quality of wideband (PESQ-WB).

引用

页码：30 / +

页数：2