DocumentCode
1954178
Title
A new low bit rate low delay algebraic CELP (ACELP) coder
Author
El-Kouatly, Rand ; El-Ramiy, S.H.
Author_Institution
Elect. & Comm. Eng. Dept., Ain Shams Univ., Cairo, Egypt
fYear
2000
fDate
2000
Abstract
The coders based upon ITU-T G.729 standard and its new version G.729A provide toll-quality speech for most operating conditions, and these coders are the prime candidates for the next generation of cellular systems. This paper presents new techniques for reducing the bit rate of these coders from 8 kbits/s to 7 kbits/s without introducing any bad effects into the coders´ performance in clean or noisy environments, and without increasing the codec delay. The new coder is called algebraic CELP (ACELP) and has 7 kbits/s with 15 ms algorithmic delay
Keywords
algebraic codes; cellular radio; code standards; delays; linear predictive coding; vocoders; 7 kbit/s; 8 kbit/s; ACELP coder; ITU-T G.729 standard; ITU-T G.729A standard; cellular systems; clean environment; codec delay; low bit rate low delay algebraic CELP coder; noisy environment; performance; toll-quality speech; Background noise; Bit rate; Code standards; Communication standards; Delay effects; Noise reduction; Noise robustness; Speech analysis; Speech enhancement; Working environment noise;
fLanguage
English
Publisher
ieee
Conference_Titel
Radio Science Conference, 2000. 17th NRSC '2000. Seventeenth National
Conference_Location
Minufiya
Print_ISBN
977-5031-64-8
Type
conf
DOI
10.1109/NRSC.2000.838933
Filename
838933
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