CN205510235U - High definition HDMI sound video switch - Google Patents
High definition HDMI sound video switch Download PDFInfo
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- CN205510235U CN205510235U CN201620127630.XU CN201620127630U CN205510235U CN 205510235 U CN205510235 U CN 205510235U CN 201620127630 U CN201620127630 U CN 201620127630U CN 205510235 U CN205510235 U CN 205510235U
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Abstract
The utility model provides a high definition HDMI sound video switch belongs to HDMI signal technical field, including input and output, the input includes a plurality of HDMI input interfaces for connect the signal source, the output has a HDMI output interface for connect display device, HDMI includes TMDS signal line and HPD signal line, after connecting gradually signal amplifier and balanced device respectively, the TMDS signal line of a plurality of HDMI input interfaces is connected with built -in MCU, again through output driver and output interface connection, the HPD signal line is connected with the switch and is connected with built -in MCU. The utility model discloses can conveniently select the input source of various differences, avoid the HDMI interface of frequent hot plug TV set and input source, sparingly connect the time of input source and TV set, give other people comfortablely, convenient, enjoy audio -visual system of high definition HDMI family better.
Description
Technical field
This utility model belongs to HDMI signalling technique field, particularly relates to a kind of high definition HDMI audiovideo switcher.
Technical background
Along with the development of science and technology, the raising of living standards of the people, increasing video have employed high definition broadcast source and plays, therefore, the various high-definition audio and video system looms that family uses also get more and more, most of based on HDMI, HDMI (High Definition
Multimedia Interface, HDMI) it is a kind of digitized video/audio interface technology, it is the tailored version digital interface being suitable for image transmission, it can transmit audio frequency and signal of video signal simultaneously.Various blue-ray DVDs, PS3/PS4 game machine, XBOX360, and computer etc. is usually used as input source, LCD TV or display are as signal receiving terminal, and the box of existing home audio-visual system requires connect on compatible high definition HDMI signal receiver, and if it is intended to change input source to need frequent hot plug television set and the HDMI of input source, devote a tremendous amount of time, loaded down with trivial details, the most convenient.
Utility model content
This utility model is for above technical problem, a kind of high definition HDMI audiovideo switcher is provided, can conveniently select various different input source, avoid frequent hot plug television set and the HDMI of input source, save the time connecting input source with television set, comfortable to people, convenient, preferably enjoy high definition HDMI home audio-visual system.
The technical solution adopted in the utility model is as follows, a kind of high definition HDMI audiovideo switcher, including input and outfan, described input includes multiple HDMI input interface, for connecting signal source, described outfan has a HDMI output interface, for connecting display device, HDMI includes TMDS holding wire and HPD signal line, it is characterized in that, the TMDS holding wire of the plurality of HDMI input interface is connected with built-in MCU after being sequentially connected with signal amplifier and equalizer respectively, it is connected with output interface through output driver again, described HPD signal line connects to be had switch and is connected with built-in MCU.
Preferably, described audiovideo switcher also includes that external MCU, described external MCU are connected with built-in MCU by iic bus, in order to the HPD low and high level of manual control input.
Preferably, described external MCU is also associated with LED state lamp, and the LED state lantern festival that selected passage is corresponding is luminous.
Preferably, described built-in MCU connects the DDC signal of HDMI, is read the EDID of display device by DDC, then EDID information is fed back to built-in MCU until signal source.
Preferably, described EDID information includes ultimate resolution, frequency, manufacturer's title and/or the build date supported.
This utility model can allow user select various different signal source more easily, use HDMI video switch of the present utility model, the time connecting input source with television set can be saved, frequent hot plug television set and the HDMI of input source can be avoided, this utility model also has automatic detection function simultaneously, as when inserting new HDMI port, the port that this utility model meeting prioritizing selection is newly inserted, the very first time is facilitated to select to need the content of viewing, when pulling out or close wherein at the HDMI port signal of display, this utility model automatic rebound can have other ports that signal inputs, but also there is LED display function, can conveniently point out the selection situation for passage.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Detailed description of the invention
HDMI signal includes four road TMDS (Transition Minimized Differential
Signaling, minimize differential signal transmission) high speed signal and four control signals, the four road TMDS high speed signals that LCD TV or display receive from HDMI are TMDS_0, TMDS_1, TMDS_2, TMDS_CLK, TMDS channel transfer video data, voice data and assistance data, the four tunnel control signals being connected with input source are SCL, SDA, CEC, HPD (Hot Plug Detect, , the iic bus of i.e. SCL and SDA composition), wherein, SCL and SDA composition DDC (Data Display Channel), EDID (Extended Display can be read
Identification Data, extending display identification data), when video source is coupled together by HDMI with display device, after video source detects HPD signal, the data of the EDID of display device can be read by DDC, finally begin to transmit the TMDS signal of the video comprising video source and audio frequency.
Specifically, illustrate below in conjunction with the accompanying drawings, this utility model is introduced in detail, it will be appreciated that simply introduce detailed description of the invention of the present utility model below, and do not lie in restriction protection domain of the present utility model.
This utility model is a kind of audiovideo switcher supporting multiple (being shown as 3 in figure) HDMI audio-video signal to input, including a HDMI audio-video signal output.
As it is shown in figure 1, include input 1 and outfan 2, input 1 is for connecting signal source, the input signal provided for display device, can be blue-ray DVD, PS3/PS4 game machine, XBOX360, and the electronic equipment such as computer, outfan 2 is used for connecting display device, and display device can beIon-conductance regards、High definition player, LCD TV,Back projection TV、Scialyscopenull、DVD record/projector、D-VHS record/projector and digit audio-visual display device，The left side is 3 TMDS signal inputs，It is then passed through signal amplifier 3，Regulated by equalizer 4 again，Connect built-in MCU 5，Then via output driver 6，By a HDMI output interface output，Reconnect display device，Simultaneously，HPD1，HPD2，HPD3 is also connected with built-in MCU 5 after connecting switch 7，SCLx/SDAx is also connected with built-in MCU 5，Communication is detected by HPD_SINK，After signal source inserts HDMI input interface，It is connected with display device by audiovideo switcher of the present utility model，The new signal source equipment accessed，Produce the voltage of 5V，Power to display device，After display device receives 5V voltage，The HPD being made the corresponding interface by its internal circuit is changed into high level，Now HPD_SINK keeps high level，When signal source equipment detects high level by audiovideo switcher，Then the EDID of display is read by SCL_SINK/SDA_SINK，EDID information is fed back to built-in MCU5，Until signal source，TMDS signal circuit is started working，Thus form a communication shaken hands，Wherein EDID information includes the ultimate resolution supported、Frequency、Manufacturer's title and/or build date.
Further, audiovideo switcher also includes external MCU8, external MCU8 is connected with built-in MCU5 by SCL_CTL/SDA_CTL, can be controlled the HPD low and high level of input artificially, thus can facilitate manual switching and the input of infrared remote controller switching signal source.
Further, external MCU8 controls also to include the display of LED state lamp 9, and the LED state lamp 9 that selected passage is corresponding can luminescence.
Further, HDMI video switch of the present utility model, the time connecting input source with television set can be saved, frequent hot plug television set and the HDMI of input source can be avoided, this utility model also has automatic detection function simultaneously, as when inserting new HDMI port, the port that this utility model meeting prioritizing selection is newly inserted, the very first time is facilitated to select to need the content of viewing, when pulling out or close wherein at the HDMI port signal of display, this utility model automatic rebound can have other ports that signal inputs, but also there is LED display function, can conveniently point out the selection situation for passage.
Embodiment of the present utility model simply introduces its detailed description of the invention, does not lies in and limits its protection domain.The technical staff of the industry may be made that some is revised under the inspiration of the present embodiment, therefore all equivalence changes done according to this utility model the scope of the claims or modification, belong in this utility model scope of the patent claims.
Claims (4)
1. a high definition HDMI audiovideo switcher, including input and outfan, described input includes multiple HDMI input interface, for connecting signal source, described outfan has a HDMI output interface, for connecting display device, HDMI includes TMDS holding wire and HPD signal line, it is characterized in that, the TMDS holding wire of the plurality of HDMI input interface is connected with built-in MCU after being sequentially connected with signal amplifier and equalizer respectively, being connected with output interface through output driver, described HPD signal line connects to be had switch and is connected with built-in MCU again.
A kind of high definition HDMI audiovideo switcher the most according to claim 1, it is characterised in that described audiovideo switcher also includes that external MCU, described external MCU are connected with built-in MCU by iic bus, in order to the HPD low and high level of manual control input.
A kind of high definition HDMI audiovideo switcher the most according to claim 2, it is characterised in that described external MCU is also associated with LED state lamp, the LED state lantern festival that selected passage is corresponding is luminous.
A kind of high definition HDMI audiovideo switcher the most according to claim 1, it is characterised in that described built-in MCU connects the DDC signal of HDMI, reads the EDID of display device by DDC, then EDID information is fed back to built-in MCU until signal source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127630.XU CN205510235U (en) | 2016-02-19 | 2016-02-19 | High definition HDMI sound video switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620127630.XU CN205510235U (en) | 2016-02-19 | 2016-02-19 | High definition HDMI sound video switch |
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| CN205510235U true CN205510235U (en) | 2016-08-24 |
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| CN201620127630.XU Active CN205510235U (en) | 2016-02-19 | 2016-02-19 | High definition HDMI sound video switch |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135355A (en) * | 2017-04-19 | 2017-09-05 | 北京小米移动软件有限公司 | HDMI inputs source switch method, device and computer-readable recording medium |
| CN111447377A (en) * | 2020-04-10 | 2020-07-24 | 深圳市显盈科技股份有限公司 | Multimedia signal conversion device |
| CN114125326A (en) * | 2020-08-26 | 2022-03-01 | 龙星显示科技股份有限公司 | Image switching control method and image processing device |
-
2016
- 2016-02-19 CN CN201620127630.XU patent/CN205510235U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107135355A (en) * | 2017-04-19 | 2017-09-05 | 北京小米移动软件有限公司 | HDMI inputs source switch method, device and computer-readable recording medium |
| CN107135355B (en) * | 2017-04-19 | 2020-07-31 | 北京小米移动软件有限公司 | HDMI input source switching method, device and computer readable storage medium |
| CN111447377A (en) * | 2020-04-10 | 2020-07-24 | 深圳市显盈科技股份有限公司 | Multimedia signal conversion device |
| CN114125326A (en) * | 2020-08-26 | 2022-03-01 | 龙星显示科技股份有限公司 | Image switching control method and image processing device |
| CN114125326B (en) * | 2020-08-26 | 2024-02-27 | 龙星显示科技股份有限公司 | Image switching control method and image processing device |
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