A Low-Bit-Rate Extension Algorithm to the 8 kbit/s CS-ACELP Based on Adaptive Fixed Codebook Modeling
Summary :
In this paper, we propose an adaptive encoding method of fixed codebook in CELP coders and implement an adaptive fixed code-excited linear prediction (AF-CELP) speech coder as a low-bit-rate extension to the 8 kbit/s CS-ACELP. The AF-CELP can be implemented at low bit rates as well as low complexity by exploiting the fact that the fixed codebook contribution to the speech signal is periodic, as is the adaptive codebook (or pitch filter) contribution. Listening tests show that the 6.4 kbit/s AF-CELP has a comparable quality to the 8 kbit/s CS-ACELP under real environmental test conditions.
- Publication
- IEICE TRANSACTIONS on Information Vol.E82-D No.7 pp.1087-1092
- Publication Date
- 1999/07/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Speech Processing and Acoustics
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Hong Kook KIM, Hwang Soo LEE, "A Low-Bit-Rate Extension Algorithm to the 8 kbit/s CS-ACELP Based on Adaptive Fixed Codebook Modeling" in IEICE TRANSACTIONS on Information,
vol. E82-D, no. 7, pp. 1087-1092, July 1999, doi: .
Abstract: In this paper, we propose an adaptive encoding method of fixed codebook in CELP coders and implement an adaptive fixed code-excited linear prediction (AF-CELP) speech coder as a low-bit-rate extension to the 8 kbit/s CS-ACELP. The AF-CELP can be implemented at low bit rates as well as low complexity by exploiting the fact that the fixed codebook contribution to the speech signal is periodic, as is the adaptive codebook (or pitch filter) contribution. Listening tests show that the 6.4 kbit/s AF-CELP has a comparable quality to the 8 kbit/s CS-ACELP under real environmental test conditions.
URL: https://global.ieice.org/en_transactions/information/10.1587/e82-d_7_1087/_p
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@ARTICLE{e82-d_7_1087,
author={Hong Kook KIM, Hwang Soo LEE, },
journal={IEICE TRANSACTIONS on Information},
title={A Low-Bit-Rate Extension Algorithm to the 8 kbit/s CS-ACELP Based on Adaptive Fixed Codebook Modeling},
year={1999},
volume={E82-D},
number={7},
pages={1087-1092},
abstract={In this paper, we propose an adaptive encoding method of fixed codebook in CELP coders and implement an adaptive fixed code-excited linear prediction (AF-CELP) speech coder as a low-bit-rate extension to the 8 kbit/s CS-ACELP. The AF-CELP can be implemented at low bit rates as well as low complexity by exploiting the fact that the fixed codebook contribution to the speech signal is periodic, as is the adaptive codebook (or pitch filter) contribution. Listening tests show that the 6.4 kbit/s AF-CELP has a comparable quality to the 8 kbit/s CS-ACELP under real environmental test conditions.},
keywords={},
doi={},
ISSN={},
month={July},}
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TY - JOUR
TI - A Low-Bit-Rate Extension Algorithm to the 8 kbit/s CS-ACELP Based on Adaptive Fixed Codebook Modeling
T2 - IEICE TRANSACTIONS on Information
SP - 1087
EP - 1092
AU - Hong Kook KIM
AU - Hwang Soo LEE
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Information
SN -
VL - E82-D
IS - 7
JA - IEICE TRANSACTIONS on Information
Y1 - July 1999
AB - In this paper, we propose an adaptive encoding method of fixed codebook in CELP coders and implement an adaptive fixed code-excited linear prediction (AF-CELP) speech coder as a low-bit-rate extension to the 8 kbit/s CS-ACELP. The AF-CELP can be implemented at low bit rates as well as low complexity by exploiting the fact that the fixed codebook contribution to the speech signal is periodic, as is the adaptive codebook (or pitch filter) contribution. Listening tests show that the 6.4 kbit/s AF-CELP has a comparable quality to the 8 kbit/s CS-ACELP under real environmental test conditions.
ER -
English
