Title :
Codebook searching for 4.8 kbps CELP speech coder
Author :
Grieder, W. ; Langi, A. ; Kinsner, W.
Author_Institution :
Dept. of Electr. & Comput. Eng, Manitoba Univ., Winnipeg, Man., Canada
fDate :
6/15/1905 12:00:00 AM
Abstract :
The authors describe an implementation of fast algorithms for codebook searching used in code-excited linear predictive (CELP) speech coding. They present details of the algorithms including (i) fast conversion of line spectrum pair parameters to linear predictive coding parameters, and (ii) fast searches of the parameters of adaptive and stochastic codebooks. The description can be readily used for CELP implementations, such as on (i) high-quality low-bit-rate speech transmission in point-to-point or store-and-forward mode, and (ii) efficient speech storage in speech recording and multimedia databases. The algorithms have been implemented on an IBM-PC AT equipped with a TMS320C30 module and a SUN Sparcstation 10 for the development of packet radio speech transmission and voice mail applications, respectively.
Keywords :
linear predictive coding; packet radio networks; search problems; speech coding; voice mail; 4.8 kbit/s; CELP; IBM-PC AT; SUN Sparcstation 10; TMS320C30 module; adaptive codebooks; code excited linear prediction; codebook searching; fast algorithms; line spectrum pair parameters; linear predictive coding parameters; multimedia databases; packet radio; point-to-point mode; speech coding; speech recording; speech storage; speech transmission; stochastic codebooks; store-and-forward mode; voice mail; Bit rate; Linear predictive coding; Multimedia databases; Packet radio networks; Performance analysis; Speech analysis; Speech coding; Stochastic processes; Sun; Voice mail;
Conference_Titel :
WESCANEX 93. 'Communications, Computers and Power in the Modern Environment.' Conference Proceedings., IEEE
Conference_Location :
Saskatoon, Sask., Canada
Print_ISBN :
0-7803-1319-4
DOI :
10.1109/WESCAN.1993.270516
