Title :
Fixed codebook design for ACELP coder using algebraic trellis vector codes
Author :
Kim, Sungjin ; Park, Heewan ; Kang, Sangwon ; Fischer, Thomas R.
Author_Institution :
Dept. of Electron. & Commun. Eng., Hanyang Univ., Ansan, South Korea
Abstract :
In this paper, a block-constrained trellis coded vector quantization (BC-TCVQ) algorithm is combined with an algebraic codebook to produce an algebraic trellis vector code (ATVC) to be used in ACELP coding. In ATVC, the set of allowed algebraic codebook pulse position is expanded, and the trellis branches are labeled with these subsets. Viterbi algorithm is used to select the excitation codevector. The ATVC block code is used as the fixed codebook of the AMR-NB 12.2kbps mode, reducing complexity compared to the conventional algebraic codebook.
Keywords :
Viterbi decoding; algebraic codes; block codes; trellis codes; vector quantisation; ACELP coder; BC-TCVQ algorithm; Viterbi algorithm; algebraic trellis vector codes; block-constrained trellis coded vector quantization; fixed codebook design; Computational complexity; Convolutional codes; Encoding; Speech; Vector quantization; Vectors; Viterbi algorithm; Speech coding; Viterbi algorithm; algebraic CELP; trellis coded vector quantization;
Conference_Titel :
Signal Processing and Communication Systems (ICSPCS), 2011 5th International Conference on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4577-1179-4
Electronic_ISBN :
978-1-4577-1178-7
DOI :
10.1109/ICSPCS.2011.6140838
