CN2919745Y - Multi-circuit switching and extending circuit of HDMI interface and television - Google Patents
Multi-circuit switching and extending circuit of HDMI interface and television Download PDFInfo
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- CN2919745Y CN2919745Y CN 200620086739 CN200620086739U CN2919745Y CN 2919745 Y CN2919745 Y CN 2919745Y CN 200620086739 CN200620086739 CN 200620086739 CN 200620086739 U CN200620086739 U CN 200620086739U CN 2919745 Y CN2919745 Y CN 2919745Y
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Abstract
The utility model discloses a HDM I interface multi-way switch extended circuit and TV, which comprises a HDMI terminal, a HDMI decoding chip and a micro-controller, the said HDMI terminal comprises multi channels, before multi-way switch, the HDMI terminal of each way is respectively connected with an EDID memory through DDC data cable, the HDMI terminal of each way is connected correspondingly with one input end of multi-way switch, the output end of the said multi-way switch is connected with the HDMI decoding chip, the control signal emitted by the micro-controller is received by the gated control end and further is outputted from one input way, the utility model adds the switching circuit on the basis of the common single-way HDMI interface and modifies a few circuitries, the HDMI interface can be extended to multi-way so as to meet the requirement of multi-way HDMI interface by user, moreover more high-quality audio-visual experience can be provided for user.
Description
Technical field
The utility model relates to a kind of improvement of TV set circuit, specifically, relates to a kind of HDMI interface to television set and realizes that multichannel is switched and the circuit of expansion.
Background technology
Continuous development along with technology, the raising gradually of personal consumption level, appreciation grade, digital audio/video equipment has obtained rapidly popularizing, as DVD, set-top box etc., people satisfy simulation class audio ﹠ video equipment the distortion and the interference problem of the intrinsic high-quality image quality tonequality of restriction.And the HDMI interface can be realized digital picture and digital accompaniment that undistorted transmission is high-quality as digital audio/video interface of new generation, thereby becomes one of consumers in general's important references point when choosing television set.At present, the HDMI interface only is furnished with one road terminal usually on television set, along with popularizing rapidly of digital audio/video equipment, one road HDMI interface can not satisfy the demands of consumers gradually, the user needs two-way, three tunnel even the HDMI interface of multichannel more, thereby obtains the high-quality audio-visual experience of more excellences.Therefore, making television set realize the reception of multichannel HDMI interface as how lower cost and simple structure, is that present television set is made one of subject matter that industry need solve.
Summary of the invention
The utility model only is furnished with one road HDMI interface in order to solve in the prior art general television set, thereby can only receive the problem of one road high-definition signal input, provide a kind of multichannel of novel HDMI interface to switch expanded circuit, originally only supporting in the television set of single channel HDMI interface, realized expansion by setting up simple circuit configuration, satisfied the reception of multi-path high-definition signal multichannel HDMI interface.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of multichannel of HDMI interface is switched expanded circuit and television set, comprise HDMI terminal, HDMI decoding chip and microcontroller, described HDMI terminal includes multichannel, the corresponding connection of wherein one road input of each road HDMI terminal and a multi-channel switch, the output of described multi-channel switch connects the HDMI decoding chip, and the gating control end receives the control signal that microcontroller sends.
As the further qualification to technique scheme, each road HDMI terminal connects a memory respectively.Described HDMI terminal links to each other with memory by the DDC data wire, and described memory is stored extending display identification data EDID.Digital audio-video signal by HDMI terminal input enters the HDMI decoding chip with the form of 4 couples of transition minimized differential signaling TMDS through multi-channel switch, EDID information stores in the described memory by the DDC data wire, and enters in the HDMI decoding chip through described multi-channel switch.Described multi-channel switch adopts the higher multi-channel switch chip of channel rate to realize.
Compared with prior art, advantage of the present utility model and good effect are: the utility model passes through to increase switching switch circuit on the basis of common single channel HDMI interface, and other a little circuit are made amendment, the HDMI interface can be expanded to multichannel, thereby satisfied the demand of user, the high-quality audio-visual experience of more excellences is provided for the user multichannel HDMI interface.Circuit structure of the present utility model is simple, and cost increases few, has good reliability and feasibility, the today in that digital audio/video equipment is popularized rapidly, has better market prospect.
Description of drawings
Fig. 1 is the receiving circuit schematic diagram of existing single channel HDMI terminal;
Fig. 2 is a multichannel HDMI terminal receiving circuit schematic diagram of the present utility model.
Embodiment
Fig. 1 is the signal receiving circuit schematic diagram of existing single channel HDMI terminal, and wherein, solid line is a data signal line; Dotted line is a control signal wire.Digital audio-video signal by HDMI terminal input enters the HDMI decoding chip with the form of 4 couples of transition minimized differential signaling TMDS, and EDID information is carried out reading of information by the EDID memory.EDID is the english abbreviation of extending display identification data Extended DisplayIdentification Data, it is a kind of VESA standard data format, the parameter that wherein comprises relevant display and performance thereof comprises that supplier information, maximum image size, color setting, manufacturer pre-set, the character string of the restriction of frequency range and display name and sequence number.The vision signal that the HDMI decoding chip solves is delivered to and is exported demonstration in the video processor; Audio signal is reduced into stereo audio signal by digital/analog converter, delivers to loud speaker and carries out sound accompaniment output.
Fig. 2 is a multichannel HDMI terminal signals receiving circuit schematic diagram of the present utility model, and wherein, solid line is a data signal line; Dotted line is a control signal wire.Each road HDMI terminal connects an EDID memory separately by the DDC data wire before multi-channel switch, the corresponding connection of wherein one road input of each road HDMI terminal and multi-channel switch, and the output of multi-channel switch connects the HDMI decoding chip; Its gating control end connects microcontroller, the gating that sends according to microcontroller instructs, gating is one tunnel input channel wherein, to be input to the HDMI decoding chip from digital audio-video signal and the EDID information that corresponding HDMI terminal receives, the vision signal that the HDMI decoding chip solves is delivered to and is exported demonstration in the video processor; Audio signal is reduced into stereo audio signal by digital/analog converter, delivers to loud speaker and carries out sound accompaniment output.
Wherein, multi-channel switch must select for use the higher chip of channel rate to realize, with the not loss of TMDS signal that guarantees two-forty, for example: if need to support that the UXGA form shows, multi-channel switch must have the above speed of 1.65GGbps.
The EDID memory is carried out DDC with each HDMI terminal respectively before multi-channel switch be connected, rather than after diverter switch, only use a slice EDID memory, be based on following consideration: end takes place and carries out the communication of EDID information with signal receiving end by the DDC data wire in HDMI standard-required signal, even still can communication under the situation that receiving terminal does not power on taking place end to power on.And if behind multi-channel switch, only use a slice EDID memory, then just can carry out the communication of EDID information under the situation that only receiving terminal also powers on taking place end to power on.According to the circuit structure described in this patent, the EDID memory is carried out DDC with each HDMI end respectively be connected before multi-channel switch, then can effectively avoid above problem, guaranteed the reliability of EDID information communication.
The utility model expands to multichannel HDMI interface with existing single channel HDMI interface, adopts single HDMI decoding chip can realize the processing that receives the decode to multichannel HDMI signal, thereby has effectively controlled cost, has quickened popularizing of digital to television interface.
Certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present utility model also should belong to protection range of the present utility model.
Claims (10)
1. the multichannel of a HDMI interface is switched expanded circuit, comprise HDMI terminal, HDMI decoding chip and microcontroller, it is characterized in that: described HDMI terminal includes multichannel, the corresponding connection of wherein one road input of each road HDMI terminal and a multi-channel switch, the output of described multi-channel switch connects the HDMI decoding chip, and the gating control end receives the control signal that microcontroller sends.
2. the multichannel of HDMI interface according to claim 1 is switched expanded circuit, and it is characterized in that: each road HDMI terminal connects a memory respectively.
3. the multichannel of HDMI interface according to claim 2 is switched expanded circuit, it is characterized in that: described HDMI terminal links to each other with memory by the DDC data wire, and described memory is stored extending display identification data EDID.
4. the multichannel of HDMI interface according to claim 3 is switched expanded circuit, it is characterized in that: the digital audio-video signal by HDMI terminal input enters the HDMI decoding chip with the form of 4 couples of transition minimized differential signaling TMDS through multi-channel switch, EDID information stores in the described memory by the DDC data wire, and enters in the HDMI decoding chip through described multi-channel switch.
5. the multichannel of HDMI interface according to claim 3 is switched expanded circuit, it is characterized in that: described multi-channel switch adopts the higher multi-channel switch chip of channel rate to realize.
6. one kind has the television set that the described HDMI interface of claim 1 multichannel is switched expanded circuit, comprise HDMI terminal, HDMI decoding chip and microcontroller, it is characterized in that: described HDMI terminal includes multichannel, the corresponding connection of wherein one road input of each road HDMI terminal and a multi-channel switch, the output of described multi-channel switch connects the HDMI decoding chip, and the gating control end receives the control signal that microcontroller sends.
7. television set according to claim 6 is characterized in that: each road HDMI terminal connects a memory respectively.
8. television set according to claim 7 is characterized in that: described HDMI terminal links to each other with memory by the DDC data wire, and described memory is stored extending display identification data EDID.
9. television set according to claim 7, it is characterized in that: the digital audio-video signal by HDMI terminal input enters the HDMI decoding chip with the form of 4 couples of transition minimized differential signaling TMDS through multi-channel switch, EDID information stores in the described memory by the DDC data wire, and enters in the HDMI decoding chip through described multi-channel switch.
10. television set according to claim 9 is characterized in that: described multi-channel switch adopts the higher multi-channel switch chip of channel rate to realize.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620086739 CN2919745Y (en) | 2006-07-05 | 2006-07-05 | Multi-circuit switching and extending circuit of HDMI interface and television |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200620086739 CN2919745Y (en) | 2006-07-05 | 2006-07-05 | Multi-circuit switching and extending circuit of HDMI interface and television |
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| CN2919745Y true CN2919745Y (en) | 2007-07-04 |
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| CN 200620086739 Expired - Fee Related CN2919745Y (en) | 2006-07-05 | 2006-07-05 | Multi-circuit switching and extending circuit of HDMI interface and television |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101127205B (en) * | 2007-09-28 | 2010-06-02 | 晨星半导体股份有限公司 | Quick port switching method and related device |
| CN101916592A (en) * | 2010-09-08 | 2010-12-15 | 福建捷联电子有限公司 | Burning-free method for liquid crystal display television HDMI EDID |
| CN102521180A (en) * | 2011-12-02 | 2012-06-27 | 百利通科技（扬州）有限公司 | Multi-channel real-time direct reading memory structure |
| CN103141063A (en) * | 2010-09-30 | 2013-06-05 | 索尼公司 | Transmitting device, transmitting method, receiving device, receiving method, transmitting/receiving system, and cable |
| CN103198810A (en) * | 2012-01-06 | 2013-07-10 | 江苏欧帝电子科技有限公司 | Manufacturing method of ultrahigh resolution high definition splicer |
| CN103634549A (en) * | 2012-08-20 | 2014-03-12 | 牛春咏 | High-definition player |
| CN101355672B (en) * | 2007-07-26 | 2014-07-09 | 株式会社东芝 | Image processing device and image processing method |
| CN104092959A (en) * | 2014-07-15 | 2014-10-08 | 山东超越数控电子有限公司 | DVI video signal switching achieving method |
| CN104869460A (en) * | 2015-05-06 | 2015-08-26 | 深圳创维－Rgb电子有限公司 | HDMI (High Definition Multimedia Interface) wireless transmitter and signal processing method |
| CN105450966A (en) * | 2015-12-17 | 2016-03-30 | 福建新大陆通信科技股份有限公司 | Method for switching HDMI input source of set top box |
| CN106297620A (en) * | 2015-05-26 | 2017-01-04 | 冠捷投资有限公司 | The liquid crystal display of built-in EDID specification switching |
| CN106851165A (en) * | 2017-03-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of HDMI signal expansion circuits, extended method and VR products |
| CN107391071A (en) * | 2017-07-31 | 2017-11-24 | 苏州佳世达电通有限公司 | Display device and the interface switching method for display device |
| CN108924458A (en) * | 2018-08-06 | 2018-11-30 | 青岛海信电器股份有限公司 | For EDID data rewriting method, device and display terminal with HDMI extended channel |
| CN109120973A (en) * | 2018-08-06 | 2019-01-01 | 青岛海信电器股份有限公司 | A kind of method, apparatus and storage medium of EDID data rewriting |
| CN111163271A (en) * | 2019-12-13 | 2020-05-15 | 晶晨半导体（深圳）有限公司 | EDID version switching method for solving HDMI compatibility problem |
| CN114157901A (en) * | 2021-10-27 | 2022-03-08 | 深圳市世纪创新显示电子有限公司 | HDMI2.1 512-byte EDID circuit and operation method |
-
2006
- 2006-07-05 CN CN 200620086739 patent/CN2919745Y/en not_active Expired - Fee Related
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101355672B (en) * | 2007-07-26 | 2014-07-09 | 株式会社东芝 | Image processing device and image processing method |
| CN101127205B (en) * | 2007-09-28 | 2010-06-02 | 晨星半导体股份有限公司 | Quick port switching method and related device |
| CN101916592A (en) * | 2010-09-08 | 2010-12-15 | 福建捷联电子有限公司 | Burning-free method for liquid crystal display television HDMI EDID |
| CN103141063A (en) * | 2010-09-30 | 2013-06-05 | 索尼公司 | Transmitting device, transmitting method, receiving device, receiving method, transmitting/receiving system, and cable |
| CN103141063B (en) * | 2010-09-30 | 2015-11-25 | 索尼公司 | Transmitting apparatus, sending method, receiving equipment, method of reseptance, transmitting/receiving system and cable |
| CN102521180B (en) * | 2011-12-02 | 2014-10-22 | 百利通科技（扬州）有限公司 | Multi-channel real-time direct reading memory structure |
| CN102521180A (en) * | 2011-12-02 | 2012-06-27 | 百利通科技（扬州）有限公司 | Multi-channel real-time direct reading memory structure |
| CN103198810A (en) * | 2012-01-06 | 2013-07-10 | 江苏欧帝电子科技有限公司 | Manufacturing method of ultrahigh resolution high definition splicer |
| CN103198810B (en) * | 2012-01-06 | 2015-05-27 | 江苏欧帝电子科技有限公司 | Manufacturing method of ultrahigh resolution high definition splicer |
| CN103634549A (en) * | 2012-08-20 | 2014-03-12 | 牛春咏 | High-definition player |
| CN104092959A (en) * | 2014-07-15 | 2014-10-08 | 山东超越数控电子有限公司 | DVI video signal switching achieving method |
| CN104869460B (en) * | 2015-05-06 | 2018-10-26 | 深圳创维－Rgb电子有限公司 | A kind of HDMI Wireless Transmitters and signal processing method |
| CN104869460A (en) * | 2015-05-06 | 2015-08-26 | 深圳创维－Rgb电子有限公司 | HDMI (High Definition Multimedia Interface) wireless transmitter and signal processing method |
| CN106297620A (en) * | 2015-05-26 | 2017-01-04 | 冠捷投资有限公司 | The liquid crystal display of built-in EDID specification switching |
| CN105450966A (en) * | 2015-12-17 | 2016-03-30 | 福建新大陆通信科技股份有限公司 | Method for switching HDMI input source of set top box |
| CN106851165A (en) * | 2017-03-28 | 2017-06-13 | 歌尔科技有限公司 | A kind of HDMI signal expansion circuits, extended method and VR products |
| CN106851165B (en) * | 2017-03-28 | 2023-10-13 | 歌尔科技有限公司 | HDMI signal expansion circuit, expansion method and VR product |
| CN107391071A (en) * | 2017-07-31 | 2017-11-24 | 苏州佳世达电通有限公司 | Display device and the interface switching method for display device |
| CN108924458A (en) * | 2018-08-06 | 2018-11-30 | 青岛海信电器股份有限公司 | For EDID data rewriting method, device and display terminal with HDMI extended channel |
| CN109120973A (en) * | 2018-08-06 | 2019-01-01 | 青岛海信电器股份有限公司 | A kind of method, apparatus and storage medium of EDID data rewriting |
| CN109120973B (en) * | 2018-08-06 | 2021-08-10 | 海信视像科技股份有限公司 | Method, device and storage medium for rewriting EDID data |
| CN108924458B (en) * | 2018-08-06 | 2021-12-07 | 海信视像科技股份有限公司 | EDID data rewriting method and device for HDMI extended channel and display terminal |
| CN113992988A (en) * | 2018-08-06 | 2022-01-28 | 海信视像科技股份有限公司 | EDID data rewriting method and display device |
| CN111163271A (en) * | 2019-12-13 | 2020-05-15 | 晶晨半导体（深圳）有限公司 | EDID version switching method for solving HDMI compatibility problem |
| CN114157901A (en) * | 2021-10-27 | 2022-03-08 | 深圳市世纪创新显示电子有限公司 | HDMI2.1 512-byte EDID circuit and operation method |
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Granted publication date: 20070704 |