Signal switching system and set-top box using the signal switching system

A technology of signal switching and set-top boxes, which is applied to parts of TV systems, image communications, and parts of color TVs, etc., and can solve problems such as abnormal output of video signals

Active Publication Date: 2019-05-31
AMBIT MICROSYSTEMS (SHANGHAI) LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the user inserts the TV SCART cable and the VCR SCART cable reversely, the video signal will not be output normally.

Method used

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  • Signal switching system and set-top box using the signal switching system
  • Signal switching system and set-top box using the signal switching system
  • Signal switching system and set-top box using the signal switching system

Examples

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Embodiment Construction

[0014] see figure 1 , a preferred embodiment of the present invention provides a signal switching system 100 that can be applied in a set-top box 200 . The set-top box 200 is connected with the TV set 300 and the video recorder 400 through a cable, so that in the video recorder display mode, the TV set 300 receives the video program shown by the video recorder 400 through the set-top box 200, or in the set-top box display mode, the TV set 300 receives the TV program output by the top box 200 .

[0015] The signal switching system 100 includes a first interface 10 , a second interface 20 , a first comparator 30 , a second comparator 40 and a switch 50 .

[0016] In this embodiment, the first interface 10 is a TV interface (such as a TV SCART interface), which is electrically connected to the TV interface of the television 300 through a first cable. The second interface 20 is a VCR interface (such as a VCR SCART interface), which is electrically connected to the VCR interface ...

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PUM

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Abstract

A signal switching system includes a first connector, a second connector, a switch unit, a first comparator, and a second comparator. The first connector is electronically coupled to a television. The second connector is electronically coupled to a video playback device. The first comparator is electronically coupled between the first connector and the switch; and the second comparator is electronically coupled between the second connector and the switch. The first comparator outputs a control command to the switch unit according to the voltage of the first connector, and the second comparator outputs a control command to the switch unit according to the voltage of the second connector. The switch unit selectively outputs a first signal or a second signal to the first connector or the second connector according to the control commands output from the first comparator and the second comparator.

Description

technical field [0001] The invention relates to a television system, in particular to a signal switching system using a set-top box to control television projection and a set-top box using the signal switching system. Background technique [0002] The set-top box circuit generally includes two interfaces, TV SCART and VCR SCART, among which TV SCART is used to connect to a TV, and VCR SCART is used to connect to a video recorder. Normally, the video signal output by the set-top box is output from the TV SCART interface. However, if the user inserts the TV SCART cable and the VCR SCART cable reversely, the video signal will not be output normally. Contents of the invention [0003] In view of the above, it is necessary to provide a signal switching system that can watch programs even when the cable is reversed. [0004] In addition, it is also necessary to provide a set-top box applying the above TV switching system. [0005] A signal switching system, which includes a f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/41H04N5/76H04N5/268H04N21/433
CPCH04N5/775H04N5/44H04N21/4135H04N21/43622H04N21/43632
Inventor 陈涛
Owner AMBIT MICROSYSTEMS (SHANGHAI) LTD
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