Audio output apparatus and television broadcast receiver

Details Audio output apparatus and television broadcast receiver Audio output apparatus and television broadcast receiver

2007-04-09

2011-12-13

Mei, Xu (Department: 2614)

Electrical audio signal processing systems and devices

Noise or distortion suppression

Soft switching, muting, or noise gating

C381S055000, C348S738000

Reexamination Certificate

active

08077879

ABSTRACT:
When an abnormality occurs in a supply circuit and its output is decreased, a protect circuit detects the abnormality and outputs a protect signal to an audio circuit. The audio circuit upon detection of the protect signal stops outputting audio so that outputting of an audio noise due to a deficiency in the supplied voltage is prevented. Meanwhile, when no abnormality occurs in the supply circuit, a microcomputer controls the audio circuit by supplying it with such a signal as to allow it to output an audio, or to increase the audio volume, or with a mute signal.

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The extended European search report includes, pursuant to Rule 62 EPC, the supplementary European search report (Art. 153(7) EPC) and the European search opinion, Apr. 2, 2009.

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