论文信息 - Fixed codebook design for ACELP coder using algebraic trellis vector codes

Fixed codebook design for ACELP coder using algebraic trellis vector codes

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.

Heewan Park | Thomas R. Fischer | Sangwon Kang | Sungjin Kim

[1] Michael W. Marcellin,et al. Trellis coded quantization of memoryless and Gauss-Markov sources , 1990, IEEE Trans. Commun..

[2] Amir K. Khandani,et al. Soft-decision decoding of fixed-rate entropy-coded trellis-coded quantizer over a noisy channel , 2004, IEEE Transactions on Vehicular Technology.

[3] Thomas R. Fischer,et al. Designing Algebraic Trellis Code as a New Fixed Codebook Module for ACELP Coder , 2008, IEICE Trans. Commun..

[4] Nader Moayeri,et al. Trellis coded vector quantization , 1992, IEEE Trans. Commun..

[5] Thomas R. Fischer,et al. Low-complexity predictive trellis-coded quantization of speech line spectral frequencies , 2004, IEEE Transactions on Signal Processing.

[6] Jr. G. Forney,et al. Viterbi Algorithm , 1973, Encyclopedia of Machine Learning.