Circuit for eliminating abnormal sound
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United States of America Patent
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Sep 14, 2010
Issued Date -
N/A
app pub date -
Oct 3, 2006
filing date -
Mar 29, 2006
priority date (Note) -
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Abstract
A circuit for eliminating abnormal sound includes a video/audio processor, a D/A converter, a front-stage mute circuit, a changing delay device, a front-stage amplifier, a back-stage amplifier, a back-stage mute circuit, and a micro control unit. The circuit is mounted in a display device connected to a DVD player. When DVD player plays the video/audio signal having HDMI standard, the display device will generate an abnormal sound (pop voice or declining voice) during performing an operation such as pause, stop or play. Therefore, this circuit uses the changing delay device, the micro control unit, and the mute circuit to filter out the noise for providing a better outputting quality.
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