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A method and device for hdmi 8K100/120 video judgment and output
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A video and digital video technology, applied in the field of transmission applications, can solve the problems of no benefit, harsh requirements, and unfavorable AVS8K ecological deployment, and achieve the effect of reducing complexity
Active Publication Date: 2022-04-08
GUANGDONG BOHUA UHD INNOVATION CENT CO LTD
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Problems solved by technology
Such 8K100 / 120 DSC 4:4:4 full specification requirements are reasonable for high-end high-performance game equipment, but for ordinary video equipment this requirement is almost harsh and does not produce benefits, which is not conducive to the development of video products or such The cost-effective optimization of products is also not conducive to the ecological deployment of AVS 8K. At present, the industry lacks a solution to this problem
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Embodiment 1
[0095] Example 1: Successfully matching with the preset list, 8K100 / 120 end-to-end video playback
[0096] Assume that the AVS set-top box receives the AVS3 bit stream and decodes the 8K100 / 120 4:2:0 video content, assuming that the set-top box preset list has 2 items:
[0097] 1. Manufacturer: Samsung; product model: QTV80E; production date: 2020;
[0098] 2. Manufacturer: Sharp; product model: LTV75W; production date: 2020;
[0099] After the downstream display device is docked with the set-top box, the set-top box first performs preset list matching on the display device. If the EDID of the display device shows that the device is a Samsung QTV80E produced in 2020 and successfully matches the first item in the preset list, continue with the 8K100 / 120 capability test.
[0100] If the EDID shows through VDB, VCDB, Y420 VDB, Y420 CMDB, VSDB and other data structures, the device supports 8K100 / 120, supports DSC1.2a, supports YCbCr 4:2:0, supports DSC 4:2:0, and has 8 Chip pro...
Embodiment 2
[0103] Example 2: 8K100 / 120 video content is downgraded for playback if it cannot match the preset list
[0104] Assume that the AVS set-top box receives the AVS3 bit stream and decodes the 8K100 / 120 4:2:0 video content, assuming that the set-top box preset list has 2 items:
[0105] 1. Manufacturer: Samsung; product model: QTV80E; production date: 2020;
[0106] 2. Manufacturer: Sharp; product model: LTV75W; production date: 2020;
[0107] After the downstream display device is docked with the set-top box, the set-top box first performs preset list matching on the display device. If the EDID of the display device indicates that the device is the Astro test device M41H produced in 2020 and cannot match any item in the preset list, the 8K100 / 120 will be abandoned and the ability judgment below 8K100 / 120 will be performed instead.
[0108] If the EDID shows through VDB, VCDB, Y420 VDB, Y420 CMDB, VSDB and other data structures, the device is below 8K100 / 120, 8K50 / 60 is preferr...
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Abstract
A method for judging and transmitting an HDMI8K100 / 120 video signal, comprising the following steps: Step 1: Connect the device, Step 2: The source device sends +5V, Step 3: The display device returns HPD high level, Step 4: The source device reads EDID, Step 5: The source device parses the EDID and matches it with the preset list. Step 6: The source device judges the capability of the display device based on the EDID. Step 7: The source device sets software and hardware parameters according to the capability of the display device and performs physical layer training. Step 8: The source device transmits the video content, step 9: the display side decompresses and other signal processing and display. The matching, judging and transmission method of the video signal in the present invention is simple and effective. After equipment matching and ability judging, the 8K100 / 120DSC4:2:0 (or 4:2:2) video content is transmitted from the source device through the HDMI cable to the Specify the display device, and perform 8K100 / 120 display playback.
Description
technical field [0001] The present invention relates to the transmission application of 8K100 / 120 video content between HDMI (High Definition Media Interface) devices, especially a method for judging and outputting HDMI 8K100 / 120 video content, which ensures the transmission channel of 8K100 / 120 video content Capability matching, while minimizing the complexity of equipment manufacturing. Background technique [0002] The existing HDMI 8K100 / 120 video output method and device are as follows: figure 1 as shown, figure 1 It is a typical HDMI2.1 system diagram with DSC capability, which includes a sending device, a receiving device and connecting wires to realize the function of the sending end and the receiving end of the signal. [0003] The processing sequence of the sender function is: [0004] a. Preset list, match the display device in the system initialization stage; [0005] b. Video decoder, decoding the video data stream provided by the program provider, such as: ...
Claims
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Application Information
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