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Signal switching system and set-top box applying 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: 2017-02-15
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 applying signal switching system
  • Signal switching system and set-top box applying signal switching system
  • Signal switching system and set-top box applying 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

The invention provides a signal switching system comprising a first interface, a second interface, a first comparator, a second comparator and a changeover switch. The first interface is used for electrical connection with a television. The second interface is used for electrical connection with a video recorder. The first comparator is electrically connected between the first interface and the changeover switch and used for outputting a control signal to the changeover switch in accordance with the voltage of the first interface. The second comparator is electrically connected to between the second interface and the changeover switch and used for outputting a control signal to the changeover switch in accordance with the voltage of the second interface. The changeover switch selectively transmits a television signal or a video signal to the first interface or the second interface based on the control signal outputted from the first comparator and the control signal outputted from the second comparator. The invention also provides a set-top box applying the above-described signal switching system. The signal switching system ensures that a user can still watch a TV program or video program while a cable is reversely plugged in.

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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IPC IPC(8): H04N21/41H04N5/76H04N5/268H04N21/433
CPCH04N5/775H04N5/44H04N21/4135H04N21/43622H04N21/43632H04N21/41H04N5/268H04N5/76H04N21/4334
Inventor 陈涛
Owner AMBIT MICROSYSTEMS (SHANGHAI) LTD
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