CN103414913A - HDMI signal generator with EDID and HDCP-KEY detection functions and signal distributor - Google Patents
HDMI signal generator with EDID and HDCP-KEY detection functions and signal distributor Download PDFInfo
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- CN103414913A CN103414913A CN201310177257XA CN201310177257A CN103414913A CN 103414913 A CN103414913 A CN 103414913A CN 201310177257X A CN201310177257X A CN 201310177257XA CN 201310177257 A CN201310177257 A CN 201310177257A CN 103414913 A CN103414913 A CN 103414913A
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Abstract
The invention discloses an HDMI signal generator with EDID and HDCP-KEY detection functions and a signal distributor. The HDMI signal generator and the signal distributor comprise a central processing module (FPGA), an HDMI signal input module, an EDID and HDCP-KEY detection judging module, an EDID and HDMI-HDCP detection result conversion into image and overlaying module and an HDMI signal output module. An input end of the central processing module is connected respectively to the HDMI signal input module, an output end of the EDID and HDCP-KEY detection judging module, and the EDID and HDMI-HDCP detection result conversion into image and overlaying module. An output end of the central processing module is connected respectively to an input end of the HDCP-KEY detection judging module and the HDMI signal output module. The HDMI signal generator with the EDID and HDCP-KEY detection functions and the signal distributor have the characteristics of simple structure and high detection efficiency.
Description
Technical field
The present invention relates to HDMI checkout equipment technical field, especially relate to a kind of HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability.
Background technology
At present, in most of electronic product, the input that the HDMI interface is provided is arranged a lot, such as television set, Set Top Box etc., whether how to detect the HDMI interface function can use, OK whether fully, mainly whether need to detect image under the HDMI interface channel and HDMI interface EDID and HDCP-KEY function normal, in prior art, in the detection of HDMI interface function, image under detection HDMI interface channel and EDID and the HDCP-KEY function of HDMI interface are separately carried out, detection efficiency is low, therefore is necessary to be improved.
Summary of the invention
Deficiency for the prior art existence, the purpose of this invention is to provide a kind of HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability, it is simple in structure, EDID and the HDCP-KEY function that image under the HDMI interface channel and voice signal can be provided simultaneously and detect the HDMI interface, detection efficiency is high.
To achieve these goals, the technical solution adopted in the present invention is:
A kind of HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability, comprise central processing module, the HDMI signal input module, EDID and HDCP-KEY detect judge module, EDID and HDMI-HDCP testing result convert image laminating module and HDMI signal output module to, the input of central processing module connects respectively the HDMI signal input module, EDID and HDCP-KEY detect the output of judge module, EDID and HDMI-HDCP testing result convert image laminating module to, the output of central processing module connects respectively input and the HDMI signal output module that HDCP-KEY detects judge module.
Further in technical scheme, described HDMI signal generator and signal distributor comprise the HDMI signal generator module, and the input of central processing module connects the HDMI signal generator module.
Further in technical scheme, described HDMI signal output module is provided with some be used to connecting product to be detected and to the output interface of output of products one to be detected with the superposed signal of HDMI picture signal, EDID and HDCP-KEY test result, each output interface is separate not to be interfere with each other.
After adopting said structure, the advantage that compared to the prior art the present invention has is: the present invention is simple in structure, can detect simultaneously image under the HDMI interface channel and EDID and the HDCP-KEY function of HDMI interface, and detection efficiency is high.In addition, the present invention can support the detection to the signal output of polylith awaiting board card and EDID and HDCP KEY function simultaneously, and the separate non-interfering settling signal output of each interface be connected with awaiting board card and EDID and HDCP KEY detection.
The accompanying drawing explanation
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of HDMI signal generator of the present invention and signal distributor.
Fig. 2 is the electrical block diagram of HDMI signal generator of the present invention and signal distributor.
Embodiment
The following stated is only preferred embodiment of the present invention, does not therefore limit protection scope of the present invention.
Embodiment, see that Fig. 1 is to shown in Figure 2: a kind of HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability, comprise central processing module (FPGA), the HDMI signal generator module, the HDMI signal input module, EDID and HDCP-KEY detect judge module, EDID and HDMI-HDCP testing result convert image laminating module and HDMI signal output module to, the input of central processing module connects respectively the HDMI signal generator module, the HDMI signal input module, EDID and HDCP-KEY detect the output of judge module, EDID and HDMI-HDCP testing result convert image laminating module to, the output of central processing module connects respectively input and the HDMI signal output module that HDCP-KEY detects judge module.
The HDMI signal output module is provided with some be used to connecting product to be detected and to the output interface of output of products one to be detected with the superposed signal of HDMI picture signal, EDID and HDCP-KEY test result, each output interface is separate not to be interfere with each other.
1, HDMI signal generator of the present invention and signal distributor can be given product B to be detected simultaneously, C, and D, E detects, and provides the input of HDMI video/audio signal by the HDMI interface.
2, HDMI signal generator of the present invention and signal distributor are being given product B to be detected, C, D, in the time of E Product supply HDMI signal, can implement simultaneously the detection of EDID and HDCP-KEY, by iic bus, directly read product B to be detected, C, D, all EDID information byte data in the EDID data conservation zone of E, and EDID data analysis and judgement are finally drawn to the EDID test result, then can start the verification that the HDCP Handshake Protocol carries out HDCP-KEY, after check results completes comparison, can with the OSD window, be superimposed upon and output to product B to be detected with the form of image, C, D, in the original image signal of the HDMI of E, the client can clearly see the EDID test result that superposes on the HDMI image and the testing result of HDCP-KEY in test HDMI interface image like this.
The present invention reads EDID by the most direct Floor layer Technology and the HDCP-KEY checking data carries out real-time analysis and judgement, and a test result of judgement changes into visual form and current HDMI signal is merged together, the client has been accomplished to the testing result of EDID and HDCP-KEY function very intuitively when detecting the HDMI image thus, has improved greatly efficiency.
Workflow explanation of the present invention:
1, HDMI signal input module or the HDMI signal generator module gives HDMI image and voice signal in real time.
2, central processing module triggers EDID and HDCP-KEY detection judge module, by iic bus, to be measured reading is got to the EDID register value, and turning back to central processing module is last testing result.Start simultaneously the checking that the HDCP Handshake Protocol completes HDCP-KEY.
3, central processing module triggering EDID and HDMI-HDCP testing result convert image laminating module to, the result detected in step 2 is superimposed upon in the HDMI picture signal of step 1 input than the mode with the OSD window with the form that becomes image, forms the HDMI picture signal with the output detections result.
4, central processing module is controlled the HDMI signal output module and is outputed on product to be measured, now just can be very visual and clear when product test HDMI image to be measured see HDMI picture signal and EDID and HDCP-KEY test result.
HDMI signal generator of the present invention and signal distributor and simple HDMI distributor on the market relatively, have the following advantages:
1, the detection of HDMI signal generator of the present invention and signal distributor band EDID and HDCP-KEY, export with the generation of HDMI signal simultaneously.
2, HDMI signal generator of the present invention and signal distributor are supported the detection of EDID and HDCP-KEY simultaneously.
3, the testing result of EDID and the HDCP-KEY form that converts image to is superimposed upon on HDMI image originally in the mode of OSD, in detected image, has just detected the function of EDID and HDCP-KEY together like this, has greatly promoted detection efficiency.
4, the present invention can support simultaneously to the signal output of polylith awaiting board card and the detection of EDID and HDCP KEY function, and the separate non-interfering settling signal output of each interface be connected with awaiting board card and EDID and HDCP KEY detection.
Above content is only preferred embodiment of the present invention, for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, and this description should not be construed as limitation of the present invention.
Claims (3)
1. with HDMI signal generator and the signal distributor of EDID and HDCP-KEY measuring ability, it is characterized in that: comprise central processing module, the HDMI signal input module, EDID and HDCP-KEY detect judge module, EDID and HDMI-HDCP testing result convert image laminating module and HDMI signal output module to, the input of central processing module connects respectively the HDMI signal input module, EDID and HDCP-KEY detect the output of judge module, EDID and HDMI-HDCP testing result convert image laminating module to, the output of central processing module connects respectively input and the HDMI signal output module that HDCP-KEY detects judge module.
2. HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability according to claim 1, it is characterized in that: described HDMI signal generator and signal distributor comprise the HDMI signal generator module, and the input of central processing module connects the HDMI signal generator module.
3. HDMI signal generator and signal distributor with EDID and HDCP-KEY measuring ability according to claim 1, it is characterized in that: described HDMI signal output module is provided with some be used to connecting product to be detected and to the output interface of output of products one to be detected with the superposed signal of HDMI picture signal, EDID and HDCP-KEY test result, each output interface is separate not to be interfere with each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310177257XA CN103414913A (en) | 2013-05-14 | 2013-05-14 | HDMI signal generator with EDID and HDCP-KEY detection functions and signal distributor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310177257XA CN103414913A (en) | 2013-05-14 | 2013-05-14 | HDMI signal generator with EDID and HDCP-KEY detection functions and signal distributor |
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| CN103414913A true CN103414913A (en) | 2013-11-27 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074241A1 (en) * | 2005-09-28 | 2007-03-29 | Lg Electronics Inc. | Digital video receiver and display method thereof |
| CN101355641A (en) * | 2007-07-26 | 2009-01-28 | 三星电子株式会社 | Video apparatus and method for recognizing digital interface thereof |
| CN102970576A (en) * | 2012-08-22 | 2013-03-13 | 冠捷显示科技（厦门）有限公司 | Extended display identification data (EDID) detection method for video graphics array (VGA) interface and high-definition multimedia interface (HDMI) interface |
| CN103024435A (en) * | 2012-12-21 | 2013-04-03 | 深圳Tcl新技术有限公司 | HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system |
| CN203340222U (en) * | 2013-05-14 | 2013-12-11 | 杨玉峰 | HDMI signal generator and signal distributor with EDID and HDCP-KEY detection functions |
-
2013
- 2013-05-14 CN CN201310177257XA patent/CN103414913A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074241A1 (en) * | 2005-09-28 | 2007-03-29 | Lg Electronics Inc. | Digital video receiver and display method thereof |
| CN101355641A (en) * | 2007-07-26 | 2009-01-28 | 三星电子株式会社 | Video apparatus and method for recognizing digital interface thereof |
| CN102970576A (en) * | 2012-08-22 | 2013-03-13 | 冠捷显示科技（厦门）有限公司 | Extended display identification data (EDID) detection method for video graphics array (VGA) interface and high-definition multimedia interface (HDMI) interface |
| CN103024435A (en) * | 2012-12-21 | 2013-04-03 | 深圳Tcl新技术有限公司 | HDMI (high-definition multimedia interface) interface detection device and method and HDMI interface system |
| CN203340222U (en) * | 2013-05-14 | 2013-12-11 | 杨玉峰 | HDMI signal generator and signal distributor with EDID and HDCP-KEY detection functions |
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Application publication date: 20131127 |