Surround decoder

Details Surround decoder Surround decoder

1989-08-07

1990-02-27

Isen, Forester W.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Quadrasonic

H04S 300

Patent

active

049052837

ABSTRACT:
A surround-decoder comprises terminals to which left and right stereo input signals are applied, a decoder for processing the left and the right stereo input signals to provide left and right stereo output signals, a center output signal and a surround output signal, circuits for detecting the left and the right stereo input signals to be monaural signals, and a switch responsive to an output signal of the detecting circuit for cutting off an output of a surround signal from the decoder.

REFERENCES:
patent: 3934086 (1976-01-01), Takahashi
patent: 3959590 (1976-05-01), Scheiber
patent: 4574391 (1986-03-01), Morishima
patent: 4589129 (1986-05-01), Blackmer et al.
patent: 4807217 (1989-02-01), Ide
"Nikkei Electronics", issued Jun. 27, 1988; pp. 88-89.

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