Method and apparatus of reducing processing steps in an audio co

Details Method and apparatus of reducing processing steps in an audio co Method and apparatus of reducing processing steps in an audio co

1996-09-20

1998-03-24

MacDonald, Allen R.

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704230, 704201, G10L 302

Patent

active

057323917

ABSTRACT:
Complexity of an audio compression system is reduced by initially allocating some bits to frequency subbands. The initial bit allocation is based on historical signal-to-mask ratio information for the audio compression system. The remaining bits are allocated to frequency subbands based on psychoacoustic parameters of the audio being encoded.

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Teh, D.H. et al. Subband Coding of High Fidelity Quality Audio Signals at 128K bps, Sep., 1992, ICASSP-92, pp. II 97 to 200.
Veldhuis, R.N.H. et al, Subband Coding of Digital Audio Signals Without Loss of Quality, Feb., 1989, IEEE, pp. 2009-2012.
Veldhuis, R.N.J., Bit Rates in Audio Source Coding, Jan. 1992 IEEE Journal Select Areas of Comm; vol. 10, No. 1, pp. 86-96.
International Standards Organization International Committee (ISO/IEC) 11172-3 Draft International Standard, "Coding of Moving Pictures and Associated Audio for Digital Storage Media at Up To 1.5 Mbits/s", Nov. 24, 1992, pp. 2, C-5 -C-12, B-2 -B-5, B9.

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