CN205081875U - HDMI signal changes VGA signal converter - Google Patents
HDMI signal changes VGA signal converter Download PDFInfo
- Publication number
- CN205081875U CN205081875U CN201520888131.8U CN201520888131U CN205081875U CN 205081875 U CN205081875 U CN 205081875U CN 201520888131 U CN201520888131 U CN 201520888131U CN 205081875 U CN205081875 U CN 205081875U
- Authority
- CN
- China
- Prior art keywords
- signal
- hdmi
- circuit
- processing module
- vga
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The utility model belongs to the technical field of the multi -media, a HDMI signal changes VGA signal converter is provided, HDMI signal, HDMI including the input receive processing module, video processing module, digital audio decoding circuit, analog audio coding circuit and DAC digital analog conversion circuit, the HDMI signal by TMDS signal, HPD signal, DDC signal make -up. The utility model discloses the advantage lies in comparing other single -chip converters, and this patent can be with multiple HDMI input format conversion VGA signal, and to target indication ware strong adaptability, customizable nature height can satisfy the different conversion demands of user, automated inspection incoming signal, and not only the eyefidelity is high, and convenient to use has multipurpose and convenient to carry's advantage moreover.
Description
Technical field
The utility model belongs to multimedia technology field, relates to a kind of HDMI signal and turns VGA signal converter.
Background technology
At present along with the TV with high-definition digital interface is popularized rapidly, multimedia audio-video field is fast-developing, increasing digital product supports HDMI port, HDMI port has become the requisite interface of modern electronic product, notebook computer is no exception, along with the progress of science and technology, notebook computer does more and more less more and more thinner, and the size of USB interface determines it can not do small and exquisite, so general notebook does not export with thicker VGA port, and the projecting apparatus of meeting room is all USB interface usually, this just needs a conversion line being turned USB interface by HDMI to complete conversion, more existing transducers can to the incompatible phenomenon of the generation of some video card when changing, the resolution of different video card also exists blind zone problem when changing, this project is the band line transducer that a kind of HDMI signal designed based on above demand turns VGA signal, to meet the signal conversion between different types display interface.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, and provides one can meet user's different switching demand, has that precision is high, little, that processing speed the is fast HDMI signal of source signal loss turns VGA signal converter.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of HDMI signal turns VGA signal converter, it is characterized in that, comprise the HDMI signal of input, HDMI receiving processing module, video processing module, digital audio decoding decoding circuit, analogue audio frequency coding circuit and DAC D/A converting circuit, described HDMI signal is by TMDS signal, HPD signal, DDC signal forms, described HDMI receiving processing module respectively with video processing module, digital audio decoding decoding circuit is electrically connected, video processing module is electrically connected with DAC D/A converting circuit, digital audio decoding decoding circuit is electrically connected with analogue audio frequency coding circuit, described TMDS signal enters video processing module after entering the process of HDMI receiving processing module and decodes, decoded signal enters into DAC D/A converting circuit and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal simultaneously enters into HDMI receiving processing module and produce the special H/VSync signal of VGA to control video processing module, HDMI receiving processing module is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit and decode, decoded signal enters analogue audio frequency coding circuit again and carries out coding generation SPDIF signal.
The measure taked for optimizing such scheme specifically comprises:
Turn in VGA signal converter at above-mentioned a kind of HDMI signal, described HDMI receiving processing module comprises HPDGenerator, HDMI1.4RX receiving circuit and HDCP, described TMDS signal enters video processing module after entering the process of HDMI1.4RX receiving circuit and decodes, decoded signal enters into DAC D/A converting circuit and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal simultaneously enters into HDMI1.4RX receiving circuit and produce the special H/VSync signal of VGA to control video processing module, HDMI1.4RX receiving circuit is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit and decode, decoded signal enters analogue audio frequency coding circuit again and carries out coding generation SPDIF signal, described HPDGenerator control HPD signal.
Turn in VGA signal converter at above-mentioned a kind of HDMI signal, described video processing module comprises VideoDecoder video decoding circuit and SyncgeneratorCSC, isolate control signal after described TMDS signal enters into HDMI1.4RX receiving circuit and produce the special H/VSync signal of VGA to control SyncgeneratorCSC, described TMDS signal enters VideoDecoder video decoding circuit after entering the process of HDMI1.4RX receiving circuit and decodes.
Turn in VGA signal converter at above-mentioned a kind of HDMI signal; this transducer also includes the buffer circuits be made up of MCU and EDIDBuffe circuit; buffer circuits is electrically connected with HDCP; the DDC signal of described HDMI enters the buffer circuits that is made up of MCU and EDIDBuffe circuit and produces the special DDC signal of VGA to control VGA, the DDC signal of described HDMI by MCU and EDIDBuffe buffer control HDCP to carry out the protection of content of copyright.
Turn in VGA signal converter at above-mentioned a kind of HDMI signal, the buffer circuits of described MCU and EDIDBuffe circuit composition is provided with GPIO interface, two-wayly on buffer circuits be electrically connected with onchipflash, described MCU and EDIDBuffe buffer circuits can be docked by GPIO interface and external Flash and MCU.
Compared with prior art, the utility model advantage is to compare other single-chip transducers, this patent can by multiple HDMI pattern of the input conversion VGA signal, to target indicator strong adaptability, customizability is high, can meet user's different switching demand, automatic detection input signal, not only eyefidelity is high, and easy to use, has multipurpose and advantage easy to carry.
Accompanying drawing explanation
Fig. 1 is the work connection layout that this HDMI signal turns VGA signal converter;
Fig. 2 is the fundamental diagram that this HDMI signal turns VGA signal converter.
Embodiment
Be below specific embodiment of the utility model and by reference to the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.
In figure, TMDS signal 1; HPD signal 2; DDC signal 3; HDMI receiving processing module 4; HPDGenerator41; HDMI1.4RX receiving circuit 42; HDCP43; Video processing module 5; VideoDecoder video decoding circuit 51; SyncgeneratorCSC52; Digital audio decoding decoding circuit 6; DAC D/A converting circuit 7; Buffer circuits 8; Onchipflash9; GPIO interface 10; HDMI signal 11; Analogue audio frequency coding circuit 12.
As shown in Figure 1, this HDMI signal turns VGA signal converter and mainly plays an intermediate axle beam action, mainly be used for the PC of band HDMI, notebook computer outputs to the display with USB interface, as projecting apparatus, liquid crystal display etc. carry out imaging, whole transducer is without the need to external power supply, directly powered by HDMI, the pure line length 15CM of HDMI public affairs/VGA master tape line, as whole transducer core component mainly HDMI signal turn VGA signal converter circuit part, as shown in Figure 2, here this HDMI signal turns the HDMI signal 11 that VGA signal converter comprises input, HDMI receiving processing module 4, video processing module 5, digital audio decoding decoding circuit 6, analogue audio frequency coding circuit 12 and DAC D/A converting circuit 7, HDMI signal 11 is by TMDS signal 1, HPD signal 2, DDC signal 3 forms, HDMI receiving processing module 4 respectively with video processing module 5, digital audio decoding decoding circuit 6 is electrically connected, video processing module 5 is electrically connected with DAC D/A converting circuit 7, digital audio decoding decoding circuit 6 is electrically connected with analogue audio frequency coding circuit 12, TMDS signal 1 enters video processing module 5 after entering HDMI receiving processing module 4 process and decodes, decoded signal enters into DAC D/A converting circuit 7 and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal 1 enters into HDMI receiving processing module 4 simultaneously and produce the special H/VSync signal of VGA to control video processing module 5, HDMI receiving processing module 4 is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit 6 and decode, decoded signal enters analogue audio frequency coding circuit 12 again and carries out coding generation SPDIF signal.
Here HDMI receiving processing module 4 comprises HPDGenerator41, HDMI1.4RX receiving circuit 42 and HDCP43, therefore the actual TMDS of being signal 1 enters after HDMI1.4RX receiving circuit 42 processes and enters video processing module 5 and decode, decoded signal enters into DAC D/A converting circuit 7 and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal 1 enters into HDMI1.4RX receiving circuit 42 simultaneously and produce the special H/VSync signal of VGA to control video processing module 5, HDMI1.4RX receiving circuit 42 is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit 6 and decode, decoded signal enters analogue audio frequency coding circuit 12 again and carries out coding generation SPDIF signal, video processing module 5 comprises VideoDecoder video decoding circuit 51 and SyncgeneratorCSC52, TMDS signal 1 is isolated control signal and is produced the special H/VSync signal of VGA to control SyncgeneratorCSC52 after entering into HDMI1.4RX receiving circuit, TMDS signal 1 enters VideoDecoder video decoding circuit 51 after entering the process of HDMI1.4RX receiving circuit and decodes, HPDGenerator41 control HPD signal 2, this transducer also includes the buffer circuits 8 be made up of MCU and EDIDBuffe circuit, buffer circuits 8 is electrically connected with HDCP43, the DDC signal 3 of HDMI enters the buffer circuits 8 be made up of MCU and EDIDBuffe circuit and produces the special DDC signal 3 of VGA to control VGA, the DDC signal 3 of HDMI by MCU and EDIDBuffe buffer control HDCP43 to carry out the protection of content of copyright, the buffer circuits 8 of MCU and EDIDBuffe circuit composition is provided with GPIO10 interface, two-wayly on buffer circuits 8 be electrically connected with onchipflash9, MCU and EDIDBuffe buffer circuits 8 can be docked by GPIO10 interface and external Flash and MCU.
This transducer by multiple HDMI pattern of the input conversion VGA signal, can be supported 1080P, support that HDMI1.4, VGA differentiate and see the following form;
| 800x60060Hz | 1024*76860Hz | 1280x72060Hz |
| 1280x102460Hz | 1366x76860Hz | 1440x90060Hz |
| 1600x120060Hz | 1680x105060Hz | 1920x108060Hz |
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various amendment or supplements or adopt similar mode to substitute to described specific embodiment, but can't depart from the scope that spirit of the present utility model defines.
Claims (5)
1. a HDMI signal turns VGA signal converter, it is characterized in that, comprise the HDMI signal of input, HDMI receiving processing module, video processing module, digital audio decoding decoding circuit, analogue audio frequency coding circuit and DAC D/A converting circuit, described HDMI signal is by TMDS signal, HPD signal, DDC signal forms, described HDMI receiving processing module respectively with video processing module, digital audio decoding decoding circuit is electrically connected, video processing module is electrically connected with DAC D/A converting circuit, digital audio decoding decoding circuit is electrically connected with analogue audio frequency coding circuit, described TMDS signal enters video processing module after entering the process of HDMI receiving processing module and decodes, decoded signal enters into DAC D/A converting circuit and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal simultaneously enters into HDMI receiving processing module and produce the special H/VSync signal of VGA to control video processing module, HDMI receiving processing module is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit and decode, decoded signal enters analogue audio frequency coding circuit again and carries out coding generation SPDIF signal.
2. a kind of HDMI signal according to claim 1 turns VGA signal converter, it is characterized in that, described HDMI receiving processing module comprises HPDGenerator, HDMI1.4RX receiving circuit and HDCP, described TMDS signal enters video processing module after entering the process of HDMI1.4RX receiving circuit and decodes, decoded signal enters into DAC D/A converting circuit and converts AnalogRGB analog signal to and export to display by USB interface, isolate control signal after TMDS signal simultaneously enters into HDMI1.4RX receiving circuit and produce the special H/VSync signal of VGA to control video processing module, HDMI1.4RX receiving circuit is isolated digital audio and video signals and is entered into digital audio decoding decoding circuit and decode, decoded signal enters analogue audio frequency coding circuit again and carries out coding generation SPDIF signal, described HPDGenerator control HPD signal.
3. a kind of HDMI signal according to claim 1 and 2 turns VGA signal converter, it is characterized in that, described video processing module comprises VideoDecoder video decoding circuit and SyncgeneratorCSC, isolate control signal after described TMDS signal enters into HDMI1.4RX receiving circuit and produce the special H/VSync signal of VGA to control SyncgeneratorCSC, described TMDS signal enters VideoDecoder video decoding circuit after entering the process of HDMI1.4RX receiving circuit and decodes.
4. a kind of HDMI signal according to claim 3 turns VGA signal converter; it is characterized in that; this transducer also includes the buffer circuits be made up of MCU and EDIDBuffe circuit; buffer circuits is electrically connected with HDCP; the DDC signal of described HDMI enters the buffer circuits that is made up of MCU and EDIDBuffe circuit and produces the special DDC signal of VGA to control VGA, the DDC signal of described HDMI by MCU and EDIDBuffe buffer control HDCP to carry out the protection of content of copyright.
5. a kind of HDMI signal according to claim 4 turns VGA signal converter, it is characterized in that, the buffer circuits of described MCU and EDIDBuffe circuit composition is provided with GPIO interface, two-wayly on buffer circuits be electrically connected with onchipflash, described MCU and EDIDBuffe buffer circuits can be docked by GPIO interface and external Flash and MCU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520888131.8U CN205081875U (en) | 2015-11-09 | 2015-11-09 | HDMI signal changes VGA signal converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520888131.8U CN205081875U (en) | 2015-11-09 | 2015-11-09 | HDMI signal changes VGA signal converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205081875U true CN205081875U (en) | 2016-03-09 |
Family
ID=55434246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520888131.8U Active CN205081875U (en) | 2015-11-09 | 2015-11-09 | HDMI signal changes VGA signal converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205081875U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112004044A (en) * | 2020-09-02 | 2020-11-27 | 深圳市研盛芯控电子技术有限公司 | Digital-analog signal conversion integrated circuit |
-
2015
- 2015-11-09 CN CN201520888131.8U patent/CN205081875U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112004044A (en) * | 2020-09-02 | 2020-11-27 | 深圳市研盛芯控电子技术有限公司 | Digital-analog signal conversion integrated circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104092959A (en) | DVI video signal switching achieving method | |
| CN103237190B (en) | A kind of VGA signal turns HDMI signal adapter | |
| CN205081875U (en) | HDMI signal changes VGA signal converter | |
| CN104219505A (en) | Multichannel high-definition analog audio and video acquisition system based on PCIe (peripheral component interface express) | |
| CN203181090U (en) | High-definition multimedia signal conversion apparatus | |
| CN102905080A (en) | Equipment and method for implementing twin-channel video output by single processor | |
| CN203457231U (en) | Intelligent video signal switching device | |
| CN105282476A (en) | Converter for converting HDMI signal into VGA signal | |
| CN204087189U (en) | Multimode computer video output unit | |
| CN203104645U (en) | Converter for converting VGA (Video Graphics Array) signal into HDMI (High Definition Multimedia Interface) signal | |
| TWI403089B (en) | Dongle | |
| CN206575546U (en) | High resolution audio and video separator | |
| CN202103778U (en) | Video graphics array interface circuit | |
| CN201518513U (en) | Digital analog integrated machine | |
| CN204859376U (en) | SDI and HDMI conversion equipment | |
| CN204836355U (en) | HDMI changes VGA audio frequency and video separator | |
| CN203747907U (en) | VGA signal and HDMI signal mutual conversion signal converter | |
| CN202373277U (en) | Device for double channel video output through utilization of uniprocessor | |
| CN206022793U (en) | A kind of two-in-one interfaces transducer | |
| CN202385226U (en) | Video signal generator | |
| CN203086595U (en) | High-definition video HDMI (high-definition multimedia interface) converter | |
| CN202231794U (en) | HDMI converter | |
| CN203552122U (en) | Internet-based network computer | |
| CN201557195U (en) | High-definition player | |
| CN205303886U (en) | Fine definition multi -media interface converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 315191, No. 6, high voltage Road, Jiangshan Town, Ningbo, Zhejiang, Yinzhou District Patentee after: ZHEJIANG SHIP ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 315191, No. 31, North Road, Jiangshan Town, Yinzhou District, Zhejiang, Ningbo Patentee before: ZHEJIANG SHIP ELECTRONIC TECHNOLOGY Co.,Ltd. |