Title :
Coding unconstrained FCB excitation using combinatorial and Huffman codes
Author :
Mittal, Udar ; Ashley, James P. ; Cruz-Zeno, E.M.
Author_Institution :
Motorola Labs., Schaumburg, IL, USA
Abstract :
A method for coding "unconstrained" fixed codebook (FCB) excitation for ACELP speech coders is proposed. The unconstrained FCB does not place track-based constraint on the pulse positions. The coding method combines Huffman codes and combinatorial codes. The method is less sensitive to bit errors and is nearly as efficient as the combinatorial codes. A method for efficiently storing the parameters needed in the combinatorial codebook is also proposed.
Keywords :
Huffman codes; error statistics; linear predictive coding; speech coding; ACELP speech coders; Huffman codes; algebraic code excited linear prediction; bit errors; combinatorial codes; fixed codebook; pulse positions; unconstrained FCB excitation; Decoding; Nonlinear filters; Product codes; Robustness; Speech coding; Vector quantization;
Conference_Titel :
Speech Coding, 2002, IEEE Workshop Proceedings.
Print_ISBN :
0-7803-7549-1
DOI :
10.1109/SCW.2002.1215747
