Coded data generation or conversion – Analog to or from digital conversion – Nonlinear
Patent
1997-03-13
1998-10-20
Young, Brian K.
Coded data generation or conversion
Analog to or from digital conversion
Nonlinear
H03M 118
Patent
active
058253203
ABSTRACT:
A method and apparatus for encoding input signals, such as digital data, by so-called high-efficiency encoding, in which pre-echo and post-echo are suppressed. A gain control position decision circuit detects an attack portion and a release portion of an audio signal entering an input terminal. An acoustic model application circuit finds a masking level based on a psychoacoustic model of the input signal. A gain control decision circuit determines the gain control value adaptively selected in accordance with the masking level. A gain control circuit controls the gain of the audio signal entering the input terminal in meeting with the gain control value.
REFERENCES:
patent: 4002841 (1977-01-01), Ching et al.
patent: 4485483 (1984-11-01), Torick et al.
patent: 4696040 (1987-09-01), Doddington et al.
patent: 4704726 (1987-11-01), Gibson
patent: 4972484 (1990-11-01), Theile et al.
patent: 5109417 (1992-04-01), Fielder et al.
patent: 5117228 (1992-05-01), Fuchigami et al.
patent: 5134658 (1992-07-01), Chen et al.
patent: 5142656 (1992-08-01), Fielder et al.
patent: 5157760 (1992-10-01), Akagiri
patent: 5185800 (1993-02-01), Mahieux
patent: 5241603 (1993-08-01), Akagiri et al.
patent: 5264846 (1993-11-01), Oikawa
patent: 5268685 (1993-12-01), Fujiwara
patent: 5274711 (1993-12-01), Rutledge et al.
patent: 5285476 (1994-02-01), Akagiri et al.
patent: 5384891 (1995-01-01), Asakawa et al.
patent: 5388181 (1995-02-01), Anderson et al.
patent: 5394473 (1995-02-01), Davidson
patent: 5410741 (1995-04-01), Cahill et al.
patent: 5438643 (1995-08-01), Akagiri et al.
patent: 5454011 (1995-09-01), Shimoyoshi
patent: 5471558 (1995-11-01), Tsutsui
patent: 5502789 (1996-03-01), Akagiri
patent: 5506907 (1996-04-01), Ueno et al.
patent: 5541600 (1996-07-01), Blumenkrantz et al.
patent: 5550924 (1996-08-01), Helf et al.
patent: 5581654 (1996-12-01), Tsutsui
patent: 5623577 (1997-04-01), Fielder
patent: 5625743 (1997-04-01), Fiocca
patent: 5632003 (1997-05-01), Davidson et al.
patent: 5634082 (1997-05-01), Shimoyoshi et al.
patent: 5651090 (1997-07-01), Moriya et al.
M. Fuma et al., "A Single Chip Decompression LSI Based on Atrac for Mini Disc", IEEE Transactions on Consumer Electronics, vol. 39, No. 3, Aug. 1993.
A. Sugiyama, et al., "Adaptive Transform Coding with an Adaptive Block Size (ATC-ABS)", C&C Systems Research Labs, NEC Corp., Kanagawa, Japan, IEEE Apr. 3-6, 1990.
R. Crochiere, "Digital Coding of Speech in Sub-Bands," The Bell System Technical Journal, vol. 55, No. 8, Oct. 1976.
J. Rothweiler, "Polyphase Quadrature Filters --A New Subband Coding Technique," ICASSP Apr. 14-16, 1983, vol. 3, pp. 1280-1283.
J. Princen et al., "Subband Transform Coding Using Filter Bank Based on Time Domain Aliasing Cancellation," ICASSP Apr. 6-9, 1987, vol. 4, pp. 2161-2164.
M. Krasner, "The Critical Band Coder--Encoding of Speech Signals Based on the Perceptual Requirements of the Auditory System," ICASSP, Apr. 1980, vol. 1-3, pp. 327-331.
R. Zelinski et al., "Adaptive Transform Coding of Speech Signals," IEEE Transactions on Acoustics, Speech and Signal Processing, vol. ASSP-25, No. 4, Aug. 1977.
Miyamori Shinji
Ueno Masatoshi
Sony Corporation
Young Brian K.
LandOfFree
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