Quiet controller of video output on optic disc device

A technology of video output and squelch control, which is applied in the direction of TV, color TV, parts of color TV, etc., and can solve the problems of harmful electromagnetic waves and other problems of human body

Inactive Publication Date: 2007-06-27
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, among the several output interfaces included in the RCA socket, even if the output interface is not connected with an external connection device, sinc

Method used

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  • Quiet controller of video output on optic disc device
  • Quiet controller of video output on optic disc device
  • Quiet controller of video output on optic disc device

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Embodiment Construction

[0021] The ideal embodiment of the squelch control device for video output on the optical disc device based on the present invention will be described in detail below with reference to the accompanying drawings.

[0022] First of all, the video output squelch control device based on the present invention is applicable to various types of optical disk equipment such as DVD player (DVD-Player) or DVD recorder (DVD-Recorder). For example, as shown in FIG. 2 , the optical disc device includes a video decoder chip 20 , a video squelch circuit 21 , an RCA socket, a connection detection unit 23 and the like.

[0023] On the other hand, the video squelch circuit 21 is composed of several squelch sections (for example: M1, M2, M3) that can switch the squelch action independently. With reference to Fig. 1 and the previous description, on the video decoder chip 20, after the MPEG video data stream read and reproduced from DVD and other optical discs is decoded into digital video data, th...

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Abstract

The invention relates to the method for mute-controlling of the output on the CD Video, which includes: a decoder-chip decodes the MPEG video data into video data, then it processes the data into analog video signals, and the connecting sockets outputs different analog video signals respectively to the external equipments, and a detector detects whether the several video output-interfaces are connected with the external equipments, and a Muting Circuit carries out mute-signal processing on the signals of the video output interface which is not connected to the external equipments. The invention detects any one of video output-interfaces in the DVD players or DVD video recorders, for instance the output interface components, the S-Video output interface and composite output interface which is not connected to the external equipments as television, meanwhile, it selectively controls the video output mute in order to effectively prevent the occurrence of poisonous unnecessary electromagnetic waves.

Description

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Claims

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Application Information

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Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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