CN203104645U - Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal - Google Patents
Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal Download PDFInfo
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- CN203104645U CN203104645U CN 201320149162 CN201320149162U CN203104645U CN 203104645 U CN203104645 U CN 203104645U CN 201320149162 CN201320149162 CN 201320149162 CN 201320149162 U CN201320149162 U CN 201320149162U CN 203104645 U CN203104645 U CN 203104645U
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Abstract
The utility model belongs to the technical field of multimedia, and provides a converter for converting a VGA (Video Graphics Array) signal into an HDMI (High Definition Multimedia Interface) signal. The converter comprises an analog VGA video signal input end, an analog audio signal input end, a TMDS (Transmission Minimized Differential Signaling) differential signal output end, a video signal conversion module, an audio signal conversion module, an HDMI video format converting and HDCP decoding module, and a storage signal processor. The converter has the main advantages that the identification of different graphics card resolution factors is solved; the signal correction and conversion are well performed; the parameter characteristics of common graphics cards of an external memory are mainly adopted for performing an automatic identification and correction method; the blind area problem of resolution factor conversion of certain graphics cards is well solved; and the automatic compensation function of the analog-to-digital conversion can effectively inhibit the nonequilibrium shaking and the mismatching of colors.
Description
Technical field
The utility model belongs to multimedia technology field, and relating to a kind of VGA signal changes the HDMI signal converter, and relating in particular to a kind of automatic identification video card resolution changes the HDMI signal converter with the VGA signal that carries the HDCP information processing.
Background technology
At present along with the TV that has the high-definition digital interface is popularized rapidly, the fast development of multimedia audio-video field, more and more need be with vision signal from having the host computer of VGA output interface, notebook computer, domestic DVD, equipment chains such as family game machine are received large-screen receiver, on the high definition display devices such as projector, more existing transducers can be to the incompatible phenomenon of the generation of some video card when conversion, the resolution of different video cards exists blind zone problem when conversion, therefore need research and develop a kind of transducer that can discern the video card resolution information automatically and be complementary with it.
Summary of the invention
Technical problem to be solved in the utility model is the present situation at prior art, provide a kind of VGA signal to change the transducer of HDMI signal, this transducer has solved the identification of different video card resolution emphatically, signal correction and conversion have better been carried out, the method that has mainly adopted the parameter attribute of the common video card of external storage to carry out automatic identification and correction has well solved the blind zone problem of the conversion of resolution of some video card.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of VGA signal changes the HDMI signal converter, it is characterized in that, comprise the input of simulation VGA vision signal, the simulated audio signal input, the output of TMDS differential signal, the vision signal modular converter, the audio signal modular converter, HDMI video format conversion and HDCP decoder module and storage assembly processor, described simulated audio signal input is connected with HDMI video format conversion and HDCP decoder module, HDMI video format conversion and HDCP decoder module are connected with the output of TMDS differential signal, described vision signal modular converter comprises clamped controller, the video automatic gain controller, analog to digital converter, video grabber and color converter, described clamped controller, analog to digital converter circulates successively with the video automatic gain controller and is connected, clamped controller is connected with the input of simulation VGA vision signal, analog to digital converter is connected with video grabber, video grabber is connected with HDMI video format conversion and HDCP decoder module by color converter, described storage assembly processor by I2C data/address bus bus configuration vision signal modular converter and HDMI video format conversion and HDCP decoder module corresponding setting, makes TMDS differential signal output optimization when having detected the input of simulation VGA vision signal.
The measure of taking for the optimization such scheme specifically comprises:
Change in the HDMI signal converter at above-mentioned a kind of VGA signal, the input of described simulation VGA vision signal mainly comprises the rgb signal of 3 tunnel analog inputs, line synchronizing signal and vertical synchronizing signal, the rgb signal of described 3 tunnel analog inputs is input to clamped controller, in analog to digital converter and the video automatic gain controller, and through video automatic gain controller programme-controlled gain, rgb signal with the VGA analog input after phase-locked loop and the clamped control is converted to 8 position digital signals, and described line synchronizing signal and vertical synchronizing signal are transported on the video grabber through 8 position digital signals after conversion after Synchronous Processing and the clock generating.
Change in the HDMI signal converter at above-mentioned a kind of VGA signal, described audio signal modular converter comprises low-frequency filter, the audio frequency automatic gain controller, the numeral decimation filter, high pass filter and audio signal catcher, described simulated audio signal input is connected with low-frequency filter, the circulation of audio frequency automatic gain controller is connected on the low-frequency filter, low-frequency filter, the numeral decimation filter, high pass filter connects successively, described high pass filter output audio serial signal is to the audio signal catcher, and the audio signal catcher is connected with HDMI video format conversion and HDCP decoder module.
Change in the HDMI signal converter at above-mentioned a kind of VGA signal, this transducer also comprises the serial external storage that is used to deposit the video card parameter information, the vision signal modular converter has video analog-to-digital conversion serial register, HDMI video format conversion and HDCP decoder module have the HDMI configuration register, described serial external storage is connected with the storage assembly processor, and video analog-to-digital conversion serial register and HDMI configuration register are all two-way to be connected on the storage assembly processor.
Compared with prior art, advantage of the present utility model is:
1, have automatic identification video card parameter, discern the function of corresponding resolution automatically, solved the function of resolution identification problem, can reach 150MSPS when analog input is converted to numeral output, therefore can support the output of 1080P video format;
2, carry the analog-to-digital conversion automatic compensation function and can effectively suppress non-equilibrium shake of color and mispairing;
3, defer to HDMI1.3 and HDCP1.1 fully, and back compatible DVI1.0, except supporting all multi-formats, this chip also can be supported the I2S digital audio and video signals of 8 tunnel 24 sampling 192KHz speed at most, also support S/PDIF input signal in addition up to 192kHz, this converter configurations HDCPROM, thereby guarantee the safe transmission of digital signal;
4, the transducer front end can support to reach the VGA signal input of 15m, and the HDMI high-definition digital signal output of 15m can be supported to reach in the rear end.
Description of drawings
Fig. 1 is the work connection layout that this VGA signal changes the HDMI signal converter;
Fig. 2 is the fundamental diagram that this VGA signal changes the HDMI signal converter;
Fig. 3 is the contour structures schematic diagram that this VGA signal changes the HDMI signal converter.
Embodiment
Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiment.
Among the figure, simulation VGA vision signal input 1; Simulated audio signal input 2; TMDS differential signal output 3; Vision signal modular converter 4; Audio signal modular converter 5; HDMI video format conversion and HDCP decoder module 6; Storage assembly processor 7; Clamped controller 8; Video automatic gain controller 9; Analog to digital converter 10; Video grabber 11; Color converter 12; Low-frequency filter 13; Audio frequency automatic gain controller 14; Numeral decimation filter 15; High pass filter 16; Audio signal catcher 17; Serial external storage 18; Video analog-to-digital conversion serial register 19; HDMI configuration register 20.
As Fig. 1, Fig. 2 and shown in Figure 3, this VGA signal changes the HDMI signal converter, comprise simulation VGA vision signal input 1, simulated audio signal input 2, TMDS differential signal output 3, vision signal modular converter 4, audio signal modular converter 5, HDMI video format conversion and HDCP decoder module 6 and storage assembly processor 7, simulated audio signal input 2 is connected with HDMI video format conversion and HDCP decoder module 6, HDMI video format conversion and HDCP decoder module 6 are connected with TMDS differential signal output 3, simulation VGA vision signal input 1 mainly comprises the rgb signal of 3 tunnel analog inputs, line synchronizing signal and vertical synchronizing signal, here the vision signal modular converter 4 of front end mainly adopts the CAT9883C chips, by the CAT9883C chip rgb signal of VGA analog input is converted to corresponding 8 position digital signals, particularly point out it and analog input is converted to when output numeral can reaches 150MSPS, therefore can support the output of 1080P video format.
Vision signal modular converter 4 (CAT9883C chip) comprises clamped controller 8, video automatic gain controller 9, analog to digital converter 10, video grabber 11 and color converter 12, clamped controller 8, analog to digital converter 10 circulates successively with video automatic gain controller 9 and is connected, clamped controller 8 is connected with 1 input of simulation VGA vision signal, analog to digital converter 10 is connected with video grabber 11, video grabber 11 is connected 3 program-controlled gains that the CAT9883C chip is integrated here by color converter 12 with HDMI video format conversion and HDCP decoder module 6, phase-locked loop and clamped control and analog to digital converter 10 with compensation performance; Therefore chip carries the analog-to-digital conversion automatic compensation function and can effectively suppress non-equilibrium shake of color and mispairing, HDMI video format conversion and HDCP decoder module 6 are to adopt chip CAT6611, it is the HDMI format converter of a high-performance and low-cost, defer to HDMI1.3 and HDCP1.1 fully, and back compatible DVI1.0.
The rgb signal of 3 tunnel analog inputs is input in clamped controller 8, analog to digital converter 10 and the video automatic gain controller 9, and after video automatic gain controller 9 programme-controlled gains, phase-locked loop and clamped control, the rgb signal of VGA analog input being converted to 8 position digital signals, line synchronizing signal and vertical synchronizing signal are transported on the video grabber 11 through 8 position digital signals after conversion after Synchronous Processing and the clock generating.
Audio signal modular converter 5 adopts the CS5340 chip can realize simulated audio signal is converted to corresponding I2S digital signal, can support the I2S digital audio and video signals of 8 tunnel 24 sampling 192KHz speed at most, audio signal modular converter 5 (CS5340 chip) mainly comprises low-frequency filter 13, audio frequency automatic gain controller 14, numeral decimation filter 15, high pass filter 16 and audio signal catcher 17, simulated audio signal input 2 is connected with low- frequency filter 13,14 circulations of audio frequency automatic gain controller are connected on the low-frequency filter 13, low-frequency filter 13, numeral decimation filter 15, high pass filter 16 connects successively, described high pass filter 16 output audio serial signals are to audio signal catcher 17, and audio signal catcher 17 is connected with HDMI video format conversion and HDCP decoder module 6.
This transducer also comprises the serial external storage 18 that is used to deposit the video card parameter information, vision signal modular converter 4 has video analog-to-digital conversion serial register 19, HDMI video format conversion and HDCP decoder module 6 have HDMI configuration register 20, serial external storage 18 is connected with storage assembly processor 7, and video analog-to-digital conversion serial register 19 is connected on the storage assembly processor 7 with HDMI configuration register 20 is all two-way.
The operation principle that this VGA signal changes the HDMI signal converter is as follows:
Front end CAT9883C chip---vision signal modular converter 4 solves input analog video signal is converted to high-accuracy digital signal; CS5340 chip--audio signal modular converter 5 is realized simulated audio signal is converted to corresponding I2S digital signal; CAT6611 chip---HDMI video format conversion and HDCP decoder module 6 generate digital audio-video signal the digital signal of HDMI form; The content that serial external storage 18 solves the video card parameter information is deposited, when having detected simulation VGA vision signal and imported 1, the input information of giving an order that CS8955F chip---storage assembly processor 7 is responsible for automatic identification signal gives the signal indication, and by corresponding video card parameter information in the I2C bus verification serial external storage 18, and by video analog-to-digital conversion serial register 19 in the I2C bus configuration CAT9883C chip with the CAT6611 chip in the relative set of HDMI configuration register 20, make the work optimization, make it the TMDS differential signal and export 3 optimizations, TMDS differential signal output 3 comprises "+" and "-" signal of input, when wiring, need consider the high-frequency signal transmission characteristic, do envelope processing accordingly, signal transmssion line need satisfy the requirement of impedance matching, and signal sends intensity and meets corresponding electromagnetic compatibility international standard.
This VGA signal changes the HDMI signal converter can obtain following technical indicator after by above design:
1, supports HDMI1.3 standard, compatible with HDMI 1.1, HDCP1.1 and DVI1.0 standard;
2, support dot frequency 65MHz to 165MHz;
Wherein DTV resolution is supported: 480i, 576i, 480p, 576p, 720p, 1080i, 1080p;
Computer resolution is supported: VGA, SVGA, XGA, SXGA, UXGA etc.
3, support digital video standard:
24-bit?RGB/YCbCr4:4:4；
16/20/24-bit?YCbCr4:2:2；
8/10/12-bit?YCbCr4:2:2(CCIR-656)；
12-bit double data rate interface;
4, support digital audio interface: audio sampling frequency is supported 32～192KHz;
Sampling length: 16～24;
5, up to 4 I2S interfaces, support 8 channel audio signals;
6. compatible to IEC 60958 and IEC61937 standard;
7. the secret key collection of the HDCP of integrated pre-programmed;
8, the external video card parameter information that can store verification;
9, pure hardware HDCP ENGINE has increased the robustness and the fail safe of operation;
10, have to input signal and output real time monitoring function.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the defined scope of spirit of the present utility model.
Claims (4)
1. a VGA signal changes the HDMI signal converter, it is characterized in that, comprise simulation VGA vision signal input (1), simulated audio signal input (2), TMDS differential signal output (3), vision signal modular converter (4), audio signal modular converter (5), HDMI video format conversion and HDCP decoder module (6) and storage assembly processor (7), described simulated audio signal input (2) is connected with HDMI video format conversion and HDCP decoder module (6), HDMI video format conversion and HDCP decoder module (6) are connected with TMDS differential signal output (3), described vision signal modular converter (4) comprises clamped controller (8), video automatic gain controller (9), analog to digital converter (10), video grabber (11) and color converter (12), described clamped controller (8), analog to digital converter (10) circulates successively with video automatic gain controller (9) and is connected, clamped controller (8) is connected with simulation VGA vision signal input (1), analog to digital converter (10) is connected with video grabber (11), video grabber (11) is connected with HDMI video format conversion and HDCP decoder module (6) by color converter (12), described storage assembly processor (7) by I2C data/address bus bus configuration vision signal modular converter (4) and HDMI video format conversion and HDCP decoder module (6) corresponding setting, makes TMDS differential signal output (3) optimization when having detected simulation VGA vision signal input (1).
2. a kind of VGA signal according to claim 1 changes the HDMI signal converter, it is characterized in that, described simulation VGA vision signal input (1) mainly comprises the rgb signal of 3 tunnel analog inputs, line synchronizing signal and vertical synchronizing signal, the rgb signal of described 3 tunnel analog inputs is input to clamped controller (8), in analog to digital converter (10) and the video automatic gain controller (9), and through video automatic gain controller (9) programme-controlled gain, rgb signal with the VGA analog input after phase-locked loop and the clamped control is converted to 8 position digital signals, and described line synchronizing signal and vertical synchronizing signal are transported on the video grabber (11) through 8 position digital signals after conversion after Synchronous Processing and the clock generating.
3. a kind of VGA signal according to claim 1 and 2 changes the HDMI signal converter, it is characterized in that, described audio signal modular converter (5) comprises low-frequency filter (13), audio frequency automatic gain controller (14), numeral decimation filter (15), high pass filter (16) and audio signal catcher (17), described simulated audio signal input (2) is connected with low-frequency filter (13), audio frequency automatic gain controller (14) circulation is connected on the low-frequency filter (13), low-frequency filter (13), numeral decimation filter (15), high pass filter (16) connects successively, described high pass filter (16) output audio serial signal is to audio signal catcher (17), and audio signal catcher (17) is connected with HDMI video format conversion and HDCP decoder module (6).
4. a kind of VGA signal according to claim 3 changes the HDMI signal converter, it is characterized in that, this transducer also comprises the serial external storage (18) that is used to deposit the video card parameter information, vision signal modular converter (4) has video analog-to-digital conversion serial register (19), HDMI video format conversion and HDCP decoder module (6) have HDMI configuration register (20), described serial external storage (18) is connected with storage assembly processor (7), and video analog-to-digital conversion serial register (19) is connected on the storage assembly processor (7) with HDMI configuration register (20) is all two-way.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320149162 CN203104645U (en) | 2013-03-28 | 2013-03-28 | Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320149162 CN203104645U (en) | 2013-03-28 | 2013-03-28 | Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237190A (en) * | 2013-03-28 | 2013-08-07 | 浙江一舟电子科技股份有限公司 | VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter |
| CN104125434A (en) * | 2014-07-31 | 2014-10-29 | 深圳锐取信息技术股份有限公司 | Long-distance high-definition transmission system |
| CN105282476A (en) * | 2015-11-09 | 2016-01-27 | 浙江一舟电子科技股份有限公司 | Converter for converting HDMI signal into VGA signal |
-
2013
- 2013-03-28 CN CN 201320149162 patent/CN203104645U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103237190A (en) * | 2013-03-28 | 2013-08-07 | 浙江一舟电子科技股份有限公司 | VGA (video graphics array) signal to HDMI (high-definition multimedia interface) signal converter |
| CN104125434A (en) * | 2014-07-31 | 2014-10-29 | 深圳锐取信息技术股份有限公司 | Long-distance high-definition transmission system |
| CN105282476A (en) * | 2015-11-09 | 2016-01-27 | 浙江一舟电子科技股份有限公司 | Converter for converting HDMI signal into VGA signal |
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| C14 | Grant of patent or utility model | ||
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Address after: 315191, No. 6, high voltage Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: ZHEJIANG SHIP ELECTRONICS TECHNOLOGY Co.,Ltd. Address before: 315191, No. 31, North Road, Jiangshan Town, Yinzhou District, Zhejiang, Ningbo Patentee before: ZHEJIANG SHIP ELECTRONICS TECHNOLOGY Co.,Ltd. |
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Granted publication date: 20130731 |
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