Reproducing multichannel sound

Details Reproducing multichannel sound Reproducing multichannel sound

1979-05-24

1981-12-01

Brown, Thomas W.

H04R 504

Patent

active

043038000

ABSTRACT:
Apparatus for extracting recorded natural ambience from two audio channels while eliminating the cave-like quality of the sound of a soloist or announcer. The two channels are combined such that signals common to the two channels in a midrange of audio frequencies are cancelled, and the combined signal is time delayed.

REFERENCES:
patent: 3067292 (1962-12-01), Minter
patent: 3725586 (1973-04-01), Iida
patent: 3919480 (1975-11-01), Fukami
patent: 3982069 (1976-09-01), Takahashi
patent: 4027101 (1977-05-01), DeFreitas et al.
patent: 4049912 (1977-09-01), Mitchell
patent: 4087629 (1978-05-01), Atoji et al.
patent: 4097689 (1978-06-01), Yamada et al.
patent: 4151369 (1979-04-01), Gerzon
"Coded Stereo for Hi-Fi," N. H. Crowhurst, Radio & TV News, Jun. 1957, pp. 60, 61 & 107.
"Time Delay for Ambience," Leonard Feldman, Audio, Dec. 1976, pp. 40-50.

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