Multi-EDID-data selective output system and method
A selective and data-based technology, applied in the direction of digital output to display equipment, electrical digital data processing, instruments, etc., can solve the problems of inconvenient video capture card, inflexible EDID data update, etc., and achieve the effect of improving reading efficiency
Active Publication Date: 2017-10-17
BEIJING INST OF RADIO MEASUREMENT
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Problems solved by technology
The video capture card uses a dedicated EEPROM chip to store EDID data, which will cause the following problems. Since the EDID data is solidified in the EEPROM, if the video capture card needs to capture another display resolution, it is necessary to reprogram the EDID data to the EEPROM, or replace the An EEPROM device that stores the EDID corresponding to the resolution, the EDID data update is not flexible, and it is not easy to adapt to the video capture card that needs to capture multiple display resolutions
Method used
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[0037] The principles and features of the present invention are described below in conjunction with examples, which are only used to explain the present invention and are not intended to limit the scope of the present invention.
[0038] Such as figure 1 As shown, a system for selectively outputting various EDID data, including a graphics card EDID interface 1, a CPCI bus 2, a power chip 3, an FPGA configuration chip 4, a clock chip 5, a dial switch 6 and an FPGA programmable logic device 7;
[0039] The input end of described power supply chip 3 is electrically connected with CPCI bus 2, and the output end of power supply chip 3 is electrically connected with FPGA configuration chip 4, clock chip 5 and FPGA programmable logic device 7 respectively, is used for FPGA configuration chip 4, Clock chip 5 and FPGA programmable logic device 7 are powered;
[0040] Provide DC 5V power to the power supply chip 3 through the CPCI bus 2 . The power supply chip 3 converts the DC 5V of th...
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The invention relates to a multi-EDID-data selective output system and method. The multi-EDID-data selective output system comprises a display card EDID interface, a CPCI bus, a power supply chip, an FPGA configuration chip, a clock chip, a dial switch and an FPGA programmable logic device. Due to programmable characteristic of an FPGA, appointed configuration files and multiple kinds of EDID data can be burned into the FPGA configuration chip according to actual needs, and then selective output is carried out through the dial switch. It can be effectively prevented that as the EDID data is solidified in an EEPROM, if a video collecting card needs to collect another display resolution, the EDID data needs to be burned into the EEPROM again, or when an EEPROM device storing corresponding resolution ratio EDID is replaced, the EDID data cannot be updated flexibly and cannot adapt to the video collecting card needing to collect multiple display resolution ratios.
Description
technical field [0001] The invention relates to the technical field of display signal processing, in particular to a system and method for selectively outputting multiple EDID data. Background technique [0002] External display device identification data (Extended DisplayIdentification Data, referred to as EDID) is a specification formulated by the Video Electronics Standards Association (referred to as VESA), which contains basic parameters of the display device, such as manufacturer, product name, and supported resolution. , RGB color values, etc. These information can be stored in the dedicated EEPROM chip of the video capture card. The video output terminal (such as a graphics card), reads the EDID data in the EEPROM of the video capture card through the EDID interface of the graphics card, and judges the resolution of the video that the current video capture card needs to capture, so as to output the correct color, line, and field information to the video capture Car...
Claims
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IPC IPC(8): G06F13/38G06F3/14G06F9/445
Inventor 彭飞
Owner BEIJING INST OF RADIO MEASUREMENT