Video/audio output device and external speaker control apparatus
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United States of America Patent
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Jun 28, 2011
Grant Date -
Feb 26, 2009
app pub date -
Sep 21, 2006
filing date -
Sep 30, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
An external speaker control apparatus causes only one of an internal speaker and an external speaker to output audio when a power supply of the external speaker control apparatus which controls the external speaker changes from an off state to an on state, the external speaker being a speaker outside a video and audio output apparatus. The external speaker control apparatus includes a microcomputer for detecting the change of the power supply of an amplifier from an off state to an on state and a HDMI/CEC communication unit or outputting an instruction requesting output of information which indicates the audio output mode to the video and audio output apparatus while at the same time receiving the information indicating the audio detects the change of the power supply from an off state to an on state, wherein the microcomputer controls the output of the audio from the external speaker according to the information indicating the audio output mode.
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