Invention Grant
US07970155B2 Video/audio output device and external speaker control apparatus
有权
视频/音频输出设备和外部扬声器控制装置
- Patent Title: Video/audio output device and external speaker control apparatus
- Patent Title (中): 视频/音频输出设备和外部扬声器控制装置
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Application No.: US11911697Application Date: 2006-09-21
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Publication No.: US07970155B2Publication Date: 2011-06-28
- Inventor: Sako Asayama , Hiroshi Kase , Mitsuteru Kataoka
- Applicant: Sako Asayama , Hiroshi Kase , Mitsuteru Kataoka
- Applicant Address: JP Osaka
- Assignee: Panasonic Corporation
- Current Assignee: Panasonic Corporation
- Current Assignee Address: JP Osaka
- Agency: Wenderoth, Lind & Ponack, L.L.P.
- Priority: JP2005-289093 20050930
- International Application: PCT/JP2006/318698 WO 20060921
- International Announcement: WO2007/040053 WO 20070412
- Main IPC: H02B1/00
- IPC: H02B1/00 ; H04R29/00

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.
Public/Granted literature
- US20090051825A1 VIDEO/AUDIO OUTPUT DEVICE AND EXTERNAL SPEAKER CONTROL APPARATUS Public/Granted day:2009-02-26
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