Surround sound processor with improved control voltage generator

Details Surround sound processor with improved control voltage generator Surround sound processor with improved control voltage generator

1996-03-27

1997-07-01

Oh, Minsun

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

381 22, H04R 500

Patent

active

056446403

ABSTRACT:
A surround sound processor for presenting stereophonic audio signals on a number of loudspeakers surrounding a listening area, comprising an input matrix stage, a detector filter and matrix circuit, a direction detector circuit incorporating improved filters, a novel detector splitter circuit providing three direction signals from the two direction detector circuit outputs, a novel three-channel servologic circuit with improved variable filters responding selectively to the rates of change of the direction signals and providing six control voltage signals through linearity correction networks to six voltage-controlled amplifiers, the outputs of which are combined in an output matrix to provide a number of loudspeaker feed signals through buffer amplifiers to the output terminals of the processor. The detector splitter circuit is configurable to either a forward oriented or a backward oriented mode of operation, corresponding changes being made to the voltage-controlled amplifiers and output matrix circuitry. Additionally the detector splitter may be switched to eliminate the third direction signal with corresponding changes to the output matrix circuitry.

REFERENCES:
patent: 5172415 (1992-12-01), Fosgate
patent: 5263087 (1993-11-01), Fosgate
patent: 5428687 (1995-06-01), Fosgate
patent: 5504819 (1996-04-01), Fosgate

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