Universal four-channel surround sound speaker system for...

Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic

Reexamination Certificate

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Details

C381S023000

Reexamination Certificate

active

06934394

ABSTRACT:
A universal four-channel multimedia computer speaker system is connectable to audio sub-system control circuits (e.g., “sound cards”) of both the four-channel type and the conventional two-channel (stereo) type. With the audio sub-system control circuit being of a four-channel type, the universal four-channel audio system functions as a conventional multimedia computer four-channel surround sound audio system. With a four audio channel multimedia computer work and the audio sub-system control circuit being of a conventional two-channel (stereo) type, the universal four-channel audio system is configured to provide one pair of wide-band speakers (e.g., the front) with distinct audio playback according to respective right-front and left-front audio channels in a four or two audio channel multimedia computer work such as a game, music, etc. The universal four-channel audio system is configured to provide at the rear speakers distinct audio playback that are generated from the right-front and left-front audio channels in the four or two audio channel multimedia computer work. With respect to the rear speakers, the universal four-channel audio system includes a proxy audio signal component that provides respective right and left rear proxy audio signals to proximate the typical sound of actual right and left rear audio signals carried on a four audio channel multimedia computer work or simulated surround signals generated from conventional two channel multimedia work.

REFERENCES:
patent: 4006306 (1977-02-01), Driscoll
patent: 4612663 (1986-09-01), Holbrook et al.
patent: 4968154 (1990-11-01), Baeg
patent: 5841993 (1998-11-01), Ho
patent: 6198826 (2001-03-01), Cowieson et al.

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