Paper Info
Title
ITU-T G.729 Annex A: reduced complexity 8 kb/s CS-ACELP codec for digital simultaneous voice and data
Abstract
This article describes the ITU-T Recommendation G.729 Annex A (G.729A) for encoding speech signals at 8 kb/s with low complexity. G.729A is the standard speech coding algorithm for multimedia digital simultaneous voice and data (DSVD). G.729A is bitstream interoperable with G.729; that is, speech coded with G.729A can be decoded with G.729, and vice versa. Like G.729, it uses the conjugate-structure algebraic code excited linear prediction (CS-ACELP) algorithm with 10 ms frames. However, several algorithmic changes have been introduced which result in a 50 percent reduction in complexity. This article describes the algorithm introduced to achieve the low complexity goal while meeting the terms of reference. Subjective tests showed that the performance of G.729A is equivalent to both G.729 and G.726 at 32 kb/s in most operating conditions; however, it is slightly worse in the case of three tandems and in the presence of background noise. A breakdown of the complexities of both G.729 and G.729A is also given
Year
DOI
Venue
1997
10.1109/35.620526
IEEE Communications Magazine
Keywords
DocType
Volume
conjugate-structure algebraic code,itu-t g.729 annex a,algorithmic change,low complexity goal,low complexity,encoding speech signal,reduced complexity,linear prediction,itu-t recommendation g.729 annex,bitstream interoperable,background noise,digital simultaneous voice,cs-acelp codec,standard speech,code excited linear prediction,internet telephony,isdn,g 729,performance,teleconferencing,algebraic code excited linear prediction,operant conditioning,signal analysis,linear predictive coding,speech synthesis,speech coding
Journal
35
Issue
ISSN
Citations 
9
0163-6804
41
PageRank 
References 
Authors
4.45
1
4
Name
Order
Citations
PageRank
R. Salami119624.90
C. Laflamme216921.28
B. Bessette315518.58
J. -P. Adoul46616.57