Paper Info
Title
An embedded variable bit-rate audio coder for ubiquitous speech communications
Abstract
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).
Year
DOI
Venue
2006
10.1007/978-3-540-71789-8_4
ICUCT
Keywords
Field
DocType
existing standard speech,g.729 coder,fittest quality,audio coder,speech signal,embedded vbr audio coder,ubiquitous speech communication,speech quality,embedded vbr coder,reasonable quality,variable bit-rate audio coder,embedded variable bit-rate,transform coding,quality of service,noise shaping,speech communication,variable bit rate
Narrowband,Code-excited linear prediction,Speech coding,Wideband audio,Computer science,Adaptive Multi-Rate audio codec,Transform coding,Speech recognition,Mean opinion score,Variable bitrate
Conference
Volume
ISSN
Citations 
4412
0302-9743
0
PageRank 
References 
Authors
0.34
1
2
Name
Order
Citations
PageRank
Do Young Kim1228.74
Jong Won Park2749.56