Multi-channel audio decoder

Details Multi-channel audio decoder Multi-channel audio decoder

1997-12-16

1999-10-26

Hudspeth, David R .

Data processing: speech signal processing, linguistics, language

Speech signal processing

For storage or transmission

704500, 704503, 704201, G10L 302

Patent

active

059743808

ABSTRACT:
A subband audio coder employs perfect
on-perfect reconstruction filters, predictive
on-predictive subband encoding, transient analysis, and psycho-acoustic/minimum mean-square-error (mmse) bit allocation over time, frequency and the multiple audio channels to encode/decode a data stream to generate high fidelity reconstructed audio. The audio coder windows the multi-channel audio signal such that the frame size, i.e. number of bytes, is constrained to lie in a desired range, and formats the encoded data so that the individual subframes can be played back as they are received thereby reducing latency. Furthermore, the audio coder processes the baseband portion (0-24 kHz) of the audio bandwidth for sampling frequencies of 48 kHz and higher with the same encoding/decoding algorithm so that audio coder architecture is future compatible.

REFERENCES:
patent: 4464783 (1984-08-01), Beraud et al.
patent: 4535472 (1985-08-01), Tomcik
patent: 4538234 (1985-08-01), Honda et al.
patent: 4622680 (1986-11-01), Zinser
patent: 4757536 (1988-07-01), Szczutkowski
patent: 4815074 (1989-03-01), Jacobsen
patent: 4817146 (1989-03-01), Szczutkowski
patent: 4896362 (1990-01-01), Veldhuis et al.
patent: 4899384 (1990-02-01), Crouse et al.
patent: 4972484 (1990-11-01), Theile et al.
patent: 5115240 (1992-05-01), Fujiwara et al.
patent: 5136377 (1992-08-01), Johnston et al.
patent: 5159611 (1992-10-01), Tomita et al.
patent: 5235623 (1993-08-01), Sugiyama et al.
patent: 5241535 (1993-08-01), Yoshikawa
patent: 5263088 (1993-11-01), Hazu et al.
patent: 5268685 (1993-12-01), Fujiwara
patent: 5285498 (1994-02-01), Johnstown
patent: 5365553 (1994-11-01), Veldhuis et al.
patent: 5388181 (1995-02-01), Anderson et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5408580 (1995-04-01), Stautner
patent: 5414795 (1995-05-01), Tsutsui et al.
patent: 5414796 (1995-05-01), Jacobs et al.
patent: 5436940 (1995-07-01), Nguyen
patent: 5438643 (1995-08-01), Akagiri et al.
patent: 5440596 (1995-08-01), Kneepkens et al.
patent: 5451954 (1995-09-01), Davis et al.
patent: 5469474 (1995-11-01), Kitzbatake
patent: 5471206 (1995-11-01), Bolliek et al.
patent: 5481614 (1996-01-01), Johnston
patent: 5488665 (1996-01-01), Johnston et al.
patent: 5490170 (1996-02-01), Akagiri et al.
patent: 5491773 (1996-02-01), Veldhuis
patent: 5535300 (1996-07-01), Hall, II et al.
patent: 5583962 (1996-12-01), Davis
patent: 5588024 (1996-12-01), Takano
patent: 5592584 (1997-01-01), Ferreira et al.
patent: 5596676 (1997-01-01), Swaminathan et al.
patent: 5606642 (1997-02-01), Stautner et al.
patent: 5608713 (1997-03-01), Akagiri et al.
patent: 5617145 (1997-04-01), Huang et al.
patent: 5621856 (1997-04-01), Akagiri
patent: 5627938 (1997-05-01), Johnston
patent: 5636324 (1997-06-01), Teh
patent: 5682461 (1997-10-01), Silzle
patent: 5717764 (1998-02-01), Johnston
patent: 5748903 (1998-05-01), Agarwal
"Information technology--Coding of moving picture and associated audio for digital storage media at up to about 1.5 Mbit/s", ISO/IEC, Mar. 1993.
Todd et al., AC-3: Flexible Perceptual Coding for Audio Transmission and Storage, Convention of the Audio Engineering Society, Feb. 26, 1994-Mar. 1, 1994, pp. 1-16.
Smyth et al., APT-X100: A Low-Delay, Low Bit-Rate, Sub-Band ADPCM Audio Coder for Broadcasting, Proceeding of the 10.sup.th International AES Conference, Sep. 7-9, 1991, pp. 41-56.
James D. Johnston, Transition Coding of Audio Signals Using Perceptual Noise Criteria, IEEE Journal on Selected Areas in Communications, vol. 6, No. 2, Feb. 1988, pp. 314-323.
MPEGI Compression Standard ISO/IEC DIS 11172, Information technology--Coding of moving pictures and associated audio storage media up to about 1,5 Mbit/s, International Organization for Standardization, 1992, pp. 290-298.

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