High quality audio coding using analysis-by-synthesis technique
High quality audio coding using analysis-by-synthesis technique
A modified regular-pulse excitation (RPE) linear predictive coding (LPC) codec is used to encode audio signals of 15 kHz bandwidth. With appropriate perceptual masking and carefully selected excitation structure, a fixed-pulse excitation (FPE) LPC codec is able to provide high-fidelity audio output. The quantization of both the LPC parameters and the excitation pulse sequence is examined. It is found that the LPC parameters can be quantized efficiently by adaptive differential PCM, while the excitation pulse sequences need more bits to quantize the amplitudes compared to narrowband speech encoding. Informal listening tests show that high-fidelity audio can be achieved at bit rates less than 100 kb/s.
3617-3620
Lin, X.
0acdfb26-ffa7-4127-a978-0466d04be666
Salami, R.A.
747b37fd-555d-4db6-8f70-0130d9b301cc
Steele, R.
7035a3e5-8a4c-434b-a105-46fe2d63d5c3
May 1991
Lin, X.
0acdfb26-ffa7-4127-a978-0466d04be666
Salami, R.A.
747b37fd-555d-4db6-8f70-0130d9b301cc
Steele, R.
7035a3e5-8a4c-434b-a105-46fe2d63d5c3
Lin, X., Salami, R.A. and Steele, R.
(1991)
High quality audio coding using analysis-by-synthesis technique.
In Proceedings of ICASSP'91.
.
Record type:
Conference or Workshop Item
(Paper)
Abstract
A modified regular-pulse excitation (RPE) linear predictive coding (LPC) codec is used to encode audio signals of 15 kHz bandwidth. With appropriate perceptual masking and carefully selected excitation structure, a fixed-pulse excitation (FPE) LPC codec is able to provide high-fidelity audio output. The quantization of both the LPC parameters and the excitation pulse sequence is examined. It is found that the LPC parameters can be quantized efficiently by adaptive differential PCM, while the excitation pulse sequences need more bits to quantize the amplitudes compared to narrowband speech encoding. Informal listening tests show that high-fidelity audio can be achieved at bit rates less than 100 kb/s.
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Published date: May 1991
Venue - Dates:
ICASSP'91, , Toronto, Canada, 1991-04-30
Organisations:
Electronics & Computer Science
Identifiers
Local EPrints ID: 253777
URI: http://eprints.soton.ac.uk/id/eprint/253777
PURE UUID: 817dc252-7d52-4c4d-93f0-ac2cf06519f7
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Date deposited: 23 Aug 2000
Last modified: 12 Dec 2021 04:21
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Contributors
Author:
X. Lin
Author:
R.A. Salami
Author:
R. Steele
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