Electrical audio signal processing systems and devices – Binaural and stereophonic – Quadrasonic
Reexamination Certificate
2005-08-23
2005-08-23
Nguyen, Duc (Department: 2643)
Electrical audio signal processing systems and devices
Binaural and stereophonic
Quadrasonic
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.
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Ipsolon LLP
Lao Lun-See
Logitech Europe S.A.
Nguyen Duc
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