Noise reduction in a stereo receiver

Details Noise reduction in a stereo receiver Noise reduction in a stereo receiver

2007-11-06

2007-11-06

Woo, Stella (Department: 2614)

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

C381S011000

Reexamination Certificate

active

10225854

ABSTRACT:
A method to denoise a stereo signal which comprises a stereo sum signal (Us(z)) and a stereo difference signal (Ud(z)), wherein a stereo to mono blending on basis of an attenuation of the stereo difference signal (Ud(z)) is performed, determines an attenuation of the stereo difference signal (Ud(z)) under consideration of the difference signal amplitude. Therefore, a stereo signal noise reducer which performs a stereo to mono blending on basis of an attenuation of the stereo difference signal, comprises an attenuation factor determination unit which determines an attenuation factor (Hatt) under consideration of the difference signal amplitude.

REFERENCES:
patent: 5253299 (1993-10-01), Ishida et al.
patent: 44 00 865 (1995-07-01), None
patent: 0 955 732 (1999-11-01), None
patent: 1 206 043 (2002-05-01), None
Patent Abstracts of Japan, vol. 018, No. 593, Nov. 11, 1994. JP 06 224866.

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