TY - GEN
T1 - Adaptive bit-allocation between the pole-zero synthesis filter and excitation in CELP
AU - Miseki, Kimio
AU - Akamine, Masami
PY - 1991/1/1
Y1 - 1991/1/1
N2 - The authors propose a CELP (code-excited linear prediction) coder with a novel adaptive bit allocation between the synthesis filter and excitation by changing the filter type between an all-pole filter and a pole-zero filter. The filter type and bit allocation are determined based on the minimum perceptually weighted error criterion. When on all-pole filter is selected as the synthesis filter, the input speech is coded in the same manner as a conventional CELP coder. When a pole-zero filter is selected, the zero filter's coefficients are coded in a closed loop. Experimental results reveal that the proposed CELP coder improves segmental signal-to-noise ratio by approximately 1 dB over a conventional CELP coder at 4.3 kb/s.
AB - The authors propose a CELP (code-excited linear prediction) coder with a novel adaptive bit allocation between the synthesis filter and excitation by changing the filter type between an all-pole filter and a pole-zero filter. The filter type and bit allocation are determined based on the minimum perceptually weighted error criterion. When on all-pole filter is selected as the synthesis filter, the input speech is coded in the same manner as a conventional CELP coder. When a pole-zero filter is selected, the zero filter's coefficients are coded in a closed loop. Experimental results reveal that the proposed CELP coder improves segmental signal-to-noise ratio by approximately 1 dB over a conventional CELP coder at 4.3 kb/s.
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U2 - 10.1109/icassp.1991.150319
DO - 10.1109/icassp.1991.150319
M3 - Conference contribution
AN - SCOPUS:0026382105
SN - 0780300033
T3 - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
SP - 229
EP - 232
BT - Proceedings - ICASSP, IEEE International Conference on Acoustics, Speech and Signal Processing
PB - Publ by IEEE
T2 - Proceedings of the 1991 International Conference on Acoustics, Speech, and Signal Processing - ICASSP 91
Y2 - 14 May 1991 through 17 May 1991
ER -