Multi-channel reproducing system

Details Multi-channel reproducing system Multi-channel reproducing system

1987-10-15

1989-10-10

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 63, H04S 500

Patent

active

048737224

ABSTRACT:
A multi-channel reproducing system comprises main speakers for sounding an input audio signal as a main channel audio signal, a phase shifter supplied with the input audio signal for shifting a phase thereof, and sub-speakers supplied with an output signal from the phase shifter as a sub-channel audio signal for sounding the sub-channel audio signal. The phase shifter has a frequency versus delay time characteristic in which a delay becomes large as the frequency decreases and small as the frequency increases.

REFERENCES:
patent: 3670106 (1972-06-01), Orban
patent: 4349698 (1982-09-01), Iwahara
patent: 4566119 (1986-01-01), Peters
patent: 4594729 (1986-06-01), Weingartner
patent: 4603429 (1980-07-01), Carver
patent: 4653096 (1987-03-01), Yokoyama
patent: 4694497 (1987-09-01), Kasai et al.
patent: 4706287 (1987-11-01), Blackmer et al.
Chamberlin, Musical Applications of Microprocessors, 1980, pp. 447-451.

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