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Set-top box signal output control circuit and set-top box

A signal output and control circuit technology, applied in image communication, electrical components, selective content distribution, etc., can solve the problem of S/PDIF signal waste

Inactive Publication Date: 2017-12-29
SHENZHEN JIUZHOU ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, it is necessary to provide a set-top box signal output control circuit and a set-top box for the problem that the above-mentioned S / PDIF interface does not use the main chip to output the S / PDIF signal and cause waste.

Method used

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  • Set-top box signal output control circuit and set-top box
  • Set-top box signal output control circuit and set-top box

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] figure 1 It is a structural diagram of a set-top box signal output control circuit in an embodiment, figure 2 It is a specific structural diagram of the set-top box signal output control circuit in an embodiment, as figure 1 and figure 2 As shown, the set-top box signal output control circuit includes: an interface state detection unit 100 and a signal control unit 200 . The interface state detection unit 100 detects whether an external device is inserted into the S / PDIF interface, and outputs a corresponding level to the signal control unit 200 according to whether there is an external...

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PUM

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Abstract

The invention relates to a set top box signal output control circuit and a set top box. The set top box signal output control circuit and the set top box detects that if an S / PDIF port is inserted by access equipment, corresponding electrical level is exported according to the detection, judge if there exists insertion of the access equipment according to the output electrical level, the S / PDIF signal will be send out if the access equipment insertion exists and the output of the S / PDIF signal will be stopped if no access equipment insertion exists, and therefore the output of the S / PDIF signal is turned off when the S / PDIF port is not inserted by access equipment or a user decides to turn off the set top box, and the power dissipation of a top set box is reduced and unnecessary electric energy waste is avoided.

Description

technical field [0001] The invention relates to audio and video equipment, in particular to a set-top box signal output control circuit and the set-top box. Background technique [0002] As a device that connects the TV to an external signal source, the set-top box can convert the compressed digital signal into TV content and display it on the TV. In addition to the images and sounds that analog TV can provide, the set-top box also has more It is widely used because it can receive data content such as electronic program guides, Internet web pages, subtitles, etc. [0003] Usually, the set-top box will be equipped with a coaxial S / PDIF interface as an audio and video interface to meet the needs of different users for users to use. The set-top box is usually equipped with other audio and video interfaces such as HDMI, RCA, YPbPr, etc., and the user may choose other interfaces as the audio and video output. At this time, although the coaxial S / PDIF interface is not used, the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N21/41H04N21/426
CPCH04N21/41H04N21/426
Inventor 朱明伟
Owner SHENZHEN JIUZHOU ELECTRIC