Sound field correction circuit

Details Sound field correction circuit Sound field correction circuit

2005-02-01

2005-02-01

Harvey, Minsun Oh (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Quadrasonic

Reexamination Certificate

active

06850622

ABSTRACT:
The invention provides a sound field correction circuit for a surround playback apparatus wherein a decoding circuit is formed from a comparatively simple circuit and similar effects to those of a ordinary sound field correction circuit can be achieved at a reduced cost. A sound field correction circuit includes a decoding circuit for restoring 2-channel stereo signals encoded for a multi-channel surround effect to obtain multi-channel surround signals. The decoding circuit includes an adder for adding the encoded 2-channel stereo signals to each other, a subtractor for subtracting one of the encoded 2-chhanel stereo signals from the other, a level adjusting volume for adjusting the output level of the adder, and another level adjusting volume for adjusting the output level of the subtractor. An output of the level adjusting volume is used as a center channel signal while an output of the level adjusting volume6is used as a surround channel signal.

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