Electrical audio signal processing systems and devices – Switching
Reexamination Certificate
2009-02-03
2011-11-08
Mei, Xu (Department: 2614)
Electrical audio signal processing systems and devices
Switching
C381S058000
Reexamination Certificate
active
08054996
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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Asayama Sako
Kase Hiroshi
Kataoka Mitsuteru
Mei Xu
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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