System for transitioning from stereo to simulated surround...

Details System for transitioning from stereo to simulated surround... System for transitioning from stereo to simulated surround...

2006-02-07

2006-02-07

Grier, Laura A. (Department: 2644)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Pseudo stereophonic

C381S018000, C381S001000, C381S307000

Reexamination Certificate

active

06996239

ABSTRACT:
This invention provides a system capable of transitioning from surround sound effect to stereo sound effect, and then to a monophonic sound effect using front speakers. A user may control the amount of surround sound effect that is combined with stereo sound effect, and the amount of stereo sound effect that is combined with monophonic sound effect. The user may also control the system to hear pure surround sound effect, stereo sound effect, or monophonic sound effect. The system may allow a user to control the contribution of a particular sound effect by controlling the relative proportions of the filtered dipole signals and the attenuated unfiltered dipole signals. The signal processing may be also done through an analog device. The system may also process some audio channels in an inverted form and compensate for these inversions by reversing the polarity of that output to the speaker, as well as accept two-channel and four-channel audio inputs.

REFERENCES:
patent: 4394536 (1983-07-01), Shima et al.
patent: 5661808 (1997-08-01), Klayman
patent: 5677957 (1997-10-01), Hulsebus
patent: 5870484 (1999-02-01), Greenberger
patent: 0 748 143 (1996-12-01), None

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