Audio coding method

Details Audio coding method Audio coding method

1996-10-28

1999-11-09

Hudspeth, David R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704219, 704220, H04N 750

Patent

active

059831758

ABSTRACT:
Coding of a high efficiency is achieved without increasing the scale of a code train transform table. Quantization spectra are divided into groups, and when two quantization spectra in any group are both equal to 0, they are coded into 0. If the two quantization spectra are not equal to 0, for example, the values (-2, 3) of the individual quantization spectra are coded into corresponding values (1101, 1110) and 1 is added to the top (or start) of the code train.

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J. Princen et al., "Subband/Transform Coding Using Filter Bank Designs Based On Time Domain Aliasing Cancellation," ICASSP Proceedings, Apr. 6-9, 1987, vol. 4, pp. 2161-2164.
R. Zelinski et al., "Adaptive Transform Coding of Speech Signals," IEEE Transactions On Acoustics, Speech and Signal Proceedings, vol. ASSP-25, No. 4, Aug. 1977, pp. 299-309.
M. Krasner, "The Critical Band Coder-Digital Encoding of Speech Signal Based On The Perceptual Requirements of The Auditory System," IEEE, Apr. 1980, vol. 1-3, pp. 327-331.
D. Huffman, "A Method For The Construction of Minimum-Redundancy Codes," Proceedings of The I.R.E., vol. 40, Sep. 1952, pp. 1098-1101.

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