Electrical audio signal processing systems and devices – Binaural and stereophonic – Pseudo stereophonic
Patent
1991-04-24
1993-06-01
Ng, Jin F.
Electrical audio signal processing systems and devices
Binaural and stereophonic
Pseudo stereophonic
381 19, 381 22, 381 63, H04R 500
Patent
active
052167186
ABSTRACT:
A method and an apparatus for processing audio signals with a directional emphasis by providing other channels besides the left and the right channels. An audio signal processing apparatus is divided into two blocks: a first block for processing digital signals of the left channel and the right channel supplied at each predetermined sampling period and outputting the signals of the left channel, right channel, and other channels which are amplified or decreased to a certain level; and a second block for detecting the level difference between the left channel signal and the right channel signal, and the level difference between the sum and the difference between the channel signals, and generating coefficients for adjusting the amplifying rate of the channels. The result is that the number of bits required for the signal processing can be reduced.
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patent: 5046098 (1991-09-01), Mandell et al.
patent: 5068813 (1991-11-01), Thoen
patent: 5077797 (1991-12-01), Ishikawa
Electronics World & Wireless World, vol. 96, No. 1647, Jan. 1990 p. 35-37, 40-42, 44, Sutton, GB, P. Dolman: "Surrounded by Sound."
Patent Abstracts of Japan, vol. 13, No. 138 (p. 852) Apr. 6, 1989, & JP-A-63 304 468.
Lefkowitz Edward
Ng Jin F.
Sanyo Electric Co,. Ltd.
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