Title :
Enhancing MPEG-4 CELP by jointly optimized inter/intra-frame LSP predictors
Author :
Koishida, Kazuhito ; Linden, Jari ; Cuperman, Vladimir ; Gersho, Allen
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
Abstract :
This paper presents an LSP quantization design method for bandwidth scalable coders such as the MPEG-4 CELP coder. In the enhancement layer of these coders, the LSP parameters are quantized using both interframe and intraframe predictors. The proposed design algorithm enables us to jointly optimize these predictors. Objective and subjective test results show that the quantizer obtained with the proposed algorithm provides better performance than that used in the MPEG-4 CELP
Keywords :
code standards; linear predictive coding; optimisation; quantisation (signal); speech coding; bandwidth scalable coders; design algorithm; enhancement layer; enhancing MPEG-4 CELP; interframe predictors; intraframe predictors; jointly optimized inter/intra-frame LSP predictors; objective test; performance; quantization design method; subjective test; Bandwidth; Design methodology; Laboratories; MPEG 4 Standard; Narrowband; Quantization; Scalability; Speech enhancement; Testing; Wideband;
Conference_Titel :
Speech Coding, 2000. Proceedings. 2000 IEEE Workshop on
Conference_Location :
Delavan, WI
Print_ISBN :
0-7803-6416-3
DOI :
10.1109/SCFT.2000.878408
