Method and circuit for creating an expanded stereo image using p

Details Method and circuit for creating an expanded stereo image using p Method and circuit for creating an expanded stereo image using p

1997-02-14

1999-04-06

Kuntz, Curtis A.

Electrical audio signal processing systems and devices

Binaural and stereophonic

281 17, 281 97, H04K 500

Patent

active

058928316

ABSTRACT:
In portable stereo radio receivers and television receivers, the loudspeakers therein may be separated only by a limited amount. This severely restricts the stereo image created by the loudspeakers. A circuit arrangement for creating an expanded stereo image may be incorporated in such receivers. This circuit arrangement first forms a combined monaural signal and a differential signal from the two stereo signals. The differential signal is then subjected to a phase shift. The phase-shifted differential signal is then matrixed with the combined monaural signal to form output stereo signals. When reproduced through stereo loudspeakers, the stereo image appears to be greatly expanded, beyond the limited placement of the loudspeakers.

REFERENCES:
patent: 4349698 (1982-09-01), Iwahara
patent: 4356349 (1982-10-01), Robinson
patent: 4451927 (1984-05-01), Hersheberger
patent: 4817162 (1989-03-01), Kihara
patent: 4868878 (1989-09-01), Kunugi et al.
patent: 5414774 (1995-05-01), Yumoto

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