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Audio/video transmission apparatus and audio/video transmission method

A technology of a sending device and a sending method, which is applied in image communication, selective content distribution, cathode ray tube indicator, etc., can solve problems such as taking a long time, and achieve the effect of reducing deviation and reducing authentication failures

Inactive Publication Date: 2009-03-18
PANASONIC CORP
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  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Audio/video transmission apparatus and audio/video transmission method
  • Audio/video transmission apparatus and audio/video transmission method
  • Audio/video transmission apparatus and audio/video transmission method

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Embodiment Construction

[0029]FIG. 1 is a diagram showing the configuration of a video and audio transmitter and a video and audio receiver of the present invention. This figure shows a state in which the audiovisual transmission device 100 and the audiovisual reception device 130 are connected via the HDMI cable 180 . The audiovisual transmission device 100 is any one of a DVD player, an HD recorder, and the like. The video and audio receiving device 130 is any one of a television, a projector, an AV amplifier, and the like. In addition, the following content may also be realized by hardware, or by software, or by a combination of software and hardware.

[0030] In FIG. 1 , 140 is a storage element (memory) for writing EDID information, 151 is a TMDS input unit for inputting a TMDS signal from the connected external video and audio transmission device 100, and 152 is a video and audio transmission unit for the connected external video and audio transmission device 100. The hot plug output part of ...

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Abstract

Audio / video signals are output in a way of corresponding to the kind of a receiption apparatus connected. An audio / video transmission apparatus (100) includes a hot plug detecting section (112) for detecting a hot plug signal output from a reception apparatus (130) connected thereto via an High Definition Multimedia Interface (HDMI), an an EDID reading / determining section (111) for determining Extended Display Identification Data (EDID) information of the reception apparatus (130), a type determining section (114) for determining a type of the reception apparatus (1300 based on a result of the determination of the EDID information, a TMDS switching section (115) for designating an output scheme corresponding to the type of the reception apparatus (130) of a plurality of Transition Minimized Differential Signaling (TMDS) signal output schemes; and a TMDS output section (113) for outputting a TMDS signal in accordance with the designated output scheme.

Description

technical field [0001] The present invention relates to a video and audio transmission device and a video and audio transmission method equipped with a high-speed interface used for transmitting video and audio information. Background technique [0002] Conventionally, a serial transmission interface called HDMI (High Definition Multimedia Interface) used to transmit video and audio information is well known. [0003] FIG. 6 is a diagram showing the configuration of a conventional video and audio transmitter and video and audio receiver. This figure shows a state in which the audiovisual transmission device 600 and the audiovisual reception device 630 are connected via an HDMI cable 680 . The video and audio transmission device 600 is any one of a DVD player, an HD recorder, and the like. The video and audio receiving device 630 is any one of a television, a projector, an AV amplifier, and the like. [0004] In FIG. 6, 640 is a storage element (memory) in which EDID (Exte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N5/765G09G5/00H04N7/173H04N21/435H04N21/436H04N21/442
CPCG09G2370/047H04N5/781H04N5/765G09G2370/14G09G2370/12G09G5/006
Inventor 町田忍岩本清孝
Owner PANASONIC CORP
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