Circuit for eliminating noise of audio signal

Details Circuit for eliminating noise of audio signal Circuit for eliminating noise of audio signal

1995-12-29

1998-06-09

Kuntz, Curtis

Electrical audio signal processing systems and devices

Noise or distortion suppression

Soft switching, muting, or noise gating

330149, H04B 1500

Patent

active

057647801

ABSTRACT:
A circuit for eliminating noise from a regenerated audio signal by detecting slope of the signal. A sensor senses an edge of a head switching pulse signal to thereby generate a predetermined control pulse. The circuit has a holder for holding a state of the regenerated audio signal in response to the control pulse and permitting charge or discharge of the held signal under a given control. A slope detector detects a slope from a fixed band of the audio signal and feeds back the detected slope to thereby control charge/discharge at the holder to alter the held signal level.

REFERENCES:
patent: 4539527 (1985-09-01), Ishigaki
patent: 4555669 (1985-11-01), Namiki
patent: 4577161 (1986-03-01), Hirohashi
patent: 4996696 (1991-02-01), McCabe

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