CN104796626B - A kind of hybrid matrix dynamic and intelligent EDID algorithms - Google Patents
A kind of hybrid matrix dynamic and intelligent EDID algorithms Download PDFInfo
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Abstract
The invention discloses a kind of hybrid matrix dynamic and intelligent EDID algorithms, the EDID information of the display device including each output port of (1) CPU readings；(2) according to the switching correspondence of current video, the EDID information of same input port, output port is mixed according to the strategy that user selects；(3) a new EDID content is generated, and informs the signal source equipment of input port, EDID is ready to complete, and exports HPD signal, and signal source is allowed to read mixed EDID contents；(4) signal source equipment exports to obtain the vision signal of optimal resolution ratio.The invention enables the optimal audio-video signals that all display devices of signal source equipment output can be compatible with, the signal source equipment of the front end enable reads the information of the display device of rear end, so that signal source input equipment can export the good signal of compatibility for meeting HDMI specifications.
Description
Technical field
The present invention relates to a kind of hybrid matrix dynamic and intelligent EDID algorithms.
Background technology
EDID：Extended Display Identification Data (extending display identification data) are a kind of VESA
Standard data format, wherein including the parameter in relation to monitor and its performance.And current video field is a rapid development
Field, from original normal resolution (567i/480i) to high definition (720p), full HD (1080), till now extremely clear
(4KX2K), in addition the video interface of various video equipments mix and deposit, such as VGA, DVI, HDMI, DP, MHL etc., so various
Old display device and deposit to video product design compatibility challenge.Video matrix is mainly used to cutting for vision signal
It changes, is broadly divided into the single matrix of interface and hybrid matrix is several, hybrid matrix is that input and output port can support multiple interfaces
Video, complexity higher, compliance higher.
Matrix on the market is all the switching of pure vision signal at present, is not cut for control signals such as DDC, HDCP
It changes, this way causes front end signal source that can not read the information of rear end display device, causes to exist in terms of compatibility very big
The problem of.Therefore, it is necessary to a kind of compatible higher video products of performance to be suitable for various the old and new's video equipments.
The content of the invention
In order to overcome the shortcomings of existing technology, the present invention provides a kind of hybrid matrix dynamic and intelligent EDID algorithms.
Technical solution of the present invention is as described below：
A kind of hybrid matrix dynamic and intelligent EDID algorithms, which is characterized in that comprise the following steps,
(1) CPU reads the EDID information of the display device of each output port；
(2) according to the switching correspondence of current video, by same input port, output port EDID information according to
The strategy of family selection is mixed；
(3) a new EDID content is generated, and informs the signal source equipment of input port, EDID is ready to complete, output
HPD signal allows signal source to read mixed EDID contents；
(4) signal source equipment exports to obtain the vision signal of optimal resolution ratio.
Further, in the step (1), corresponding 128 byte is chosen directly either according to EDID v1.3 standards
The EDID contents of 256 bytes, and these contents are stored in SDRAM.
The HPD feet of the real-time detection output mouths of CPU need again actively if the display device of output changes
Read EDID information.
Further, the output port is holotype, actively initiates the reading of EDID.
Further, in the step (2), the EDID information of each input port is calculated, input letter is notified by HPD feet
Number source device, EDID information is already prepared to or EDID has been updated over.
Further, in the step (3), input port DDC passages are slave device, inform that input is set by HDP signals
It is standby, it is read for rising
Further, the input port, the DDC passages of output port are connected to FPGA.
According to the above-mentioned present invention, its advantage is, present invention is generally directed to hybrid matrix output termination is a variety of aobvious
Show equipment, read the information (EDID) of related display device, a new EDID is synthesized by algorithm, informs associated input
The video source device of port, the optimal highest video flowing of compatibility of notice video source output.It is defeated the invention enables signal source equipment
Go out the optimal audio-video signal that all display devices can be compatible with.
The present invention programs the switching carried out to DDC signals in logic by FPGA, and the signal source equipment of the front end enable is read
The information of the display device of rear end is taken, such front end signal source output equipment is by analyzing the EDID information read so that signal
Source input equipment can export the good signal of compatibility for meeting HDMI specifications.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings and the present invention is further described in embodiment：
As shown in Figure 1, the present invention provides a kind of hybrid matrix dynamic and intelligent EDID algorithms, which is characterized in that including following
Step,
(1) CPU reads the EDID information of the display device of each output port；
(2) according to the switching correspondence of current video, by same input port, output port EDID information according to
The strategy of family selection is mixed；
(3) a new EDID content is generated, and informs the signal source equipment of input port, EDID is ready to complete, output
HPD signal allows signal source to read mixed EDID contents；
(4) signal source equipment exports to obtain the vision signal of optimal resolution ratio.
Inventive algorithm reads the EDID that each output port connects display device first, by judging input port and defeated
The output port of same input port is classified as one group by the correspondence of outlet, and the EDID of the output port of this group is synthesized,
EDID as this group of input port.
The present invention specific algorithm be：
1st, each input, the DDC passages of output are all connected to FPGA, and output port is holotype, actively initiates EDID
Reading, corresponding 128 byte directly either EDID contents of 256 bytes are chosen according to the standard of EDID v1.3, by these
Content is stored in SDRAM.
HPD (hot plug detect) foot of the real-time detection output mouths of CPU, if the display device of output changes
It then needs actively to read EDID again.
2nd, the meaning of each field of each EDID read according to EDID V1.3 standard analysis.
3rd, according to set strategy (such as the ability being subject to when mixing wherein all the way or with multichannel EDID
Subject to, can support compared with subject to high-resolution, more acoustic pattern etc. or be subject to the Edid or Intelligent Hybrid of capabilities),
The EDID information of each input port will be calculated by these strategies.Input signal source device is notified by HPD feet.EDID information
It is already prepared to or EDID has been updated over.
4th, input port DDC passages are slave device, and input equipment is informed by HDP signals, are read for rising.
The invention enables the optimal audio-video signals that all display devices of signal source equipment output can be compatible with；The present invention is logical
The switching of FPGA programmings to the progress of DDC signals in logic is crossed, the signal source equipment of the front end enable reads the display device of rear end
Information, such front end signal source output equipment is by analyzing the EDID information read so that signal source input equipment can export
Meet the good signal of compatibility of HDMI specifications.
According to above-mentioned product of the present invention, hybrid matrix MT66P, MTP248 etc. realize the switching of intelligent EDID, and
And compatible functional achieve apparent effect compared with existing product.
It should be appreciated that for those of ordinary skills, can be improved or converted according to the above description,
And all these modifications and variations should all belong to the protection domain of appended claims of the present invention.
Illustrative description has been carried out to patent of the present invention above in conjunction with attached drawing, it is clear that the realization of patent of the present invention and from
The limitation of aforesaid way, if employ patent of the present invention methodology and technical solution carry out various improvement or without
It improves and the design of patent of the present invention and technical solution is directly applied into other occasions, within the scope of the present invention.
Claims (3)
1. a kind of hybrid matrix dynamic and intelligent EDID algorithms, which is characterized in that comprise the following steps,
(1) CPU reads the EDID information of the display device of each output port, and corresponding 128 are chosen according to EDID v1.3 standards
The byte directly either EDID contents of 256 bytes, and these contents are stored in SDRAM；
(2) according to the switching correspondence of current video, the EDID information of same input port, output port is selected according to user
The strategy selected is mixed；
The EDID information of each input port is calculated, input signal source device is notified by HPD feet, EDID information is already prepared to
Or EDID has been updated over；
(3) a new EDID content is generated, and informs the signal source equipment of input port, EDID is ready to complete, output HPD letters
Number, signal source is allowed to read mixed EDID contents；
(4) signal source equipment exports to obtain the vision signal of optimal resolution ratio；
The input port, the DDC passages of output port are connected to FPGA；
The HPD feet of the real-time detection output mouths of CPU need actively to read again if the display device of output changes
EDID information.
2. hybrid matrix dynamic and intelligent EDID algorithms according to claim 1, which is characterized in that based on the output port
Pattern actively initiates the reading of EDID.
3. hybrid matrix dynamic and intelligent EDID algorithms according to claim 1, which is characterized in that defeated in the step (3)
Inbound port DDC passages are slave device, and input equipment is informed by HDP signals, are read for rising.
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| CN106507015A (en) * | 2015-09-08 | 2017-03-15 | 北京东方久瑞系统工程技术有限公司 | A kind of allotter display output method operated based on EDID |
| CN105872411A (en) * | 2016-05-31 | 2016-08-17 | 深圳市双赢伟业科技股份有限公司 | Information switching control method and switch |
| CN108055492A (en) * | 2017-12-20 | 2018-05-18 | 深圳市深智电科技有限公司 | A kind of HDMI sounds draw piece-rate system and method |
| CN108156398A (en) * | 2018-01-03 | 2018-06-12 | 山东超越数控电子股份有限公司 | A kind of VGA Video Graphics Arrays and its method of work |
| CN111949236A (en) * | 2019-05-16 | 2020-11-17 | 慧荣科技股份有限公司 | Display information processing apparatus and display information processing method |
| CN110248118A (en) * | 2019-06-18 | 2019-09-17 | 深圳市拔超科技有限公司 | A kind of Output matrix processing method, device, Inverse problem equipment and readable storage medium storing program for executing |
| CN111031261A (en) * | 2019-12-31 | 2020-04-17 | 南京洛菲特数码科技有限公司 | HDMI video matrix input signal and display device matching method |
| CN112333407B (en) * | 2021-01-05 | 2021-03-26 | 南京优视互联科技有限公司 | Video display capability compatibility method, port switching method and video matrix |
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| US7893941B2 (en) * | 2006-09-15 | 2011-02-22 | Rgb Spectrum | Intelligent video graphics switcher |
| CN101894536A (en) * | 2010-06-26 | 2010-11-24 | 大连捷成实业发展有限公司 | Application method capable of enabling all displays connected to matrix to display normally |
| CN102752543A (en) * | 2012-07-27 | 2012-10-24 | 北京威泰嘉业科技有限公司 | Seamless switching method and seamless switching system of high-definition hybrid matrix |
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Inventor after: Zeng Xumin Inventor after: Wang Jiaye Inventor after: Zhan Chenghai Inventor after: Tu Huakang Inventor after: Wei Yushan Inventor after: Zeng Shuisheng Inventor after: Xiao Yuan Inventor before: Kong Yiqiang Inventor before: Zhu Zhanlong |
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Address after: G-2f, jinxiongda science and Technology Park, 105 huanguan South Road, Guanlan street, Longhua New District, Shenzhen, Guangdong 518000 Patentee after: Shenzhen Dongming Juchuang Electronics Co.,Ltd. Address before: G-2f, jinxiongda science and Technology Park, 105 huanguan South Road, Guanlan street, Longhua New District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN PTN ELECTRONICS Ltd. |