CN-122027850-A - Video frame rate adjusting method, system, medium, program and terminal based on LED display device

CN122027850ACN 122027850 ACN122027850 ACN 122027850ACN-122027850-A

Abstract

The application provides a video frame rate adjusting method, a system, a medium, a program and a terminal based on an LED display device, which select different frame supplementing strategies according to a second motion intensity value, adopt frame repetition when low motion is needed only by inserting one frame, zero motion estimation and zero-amount delay are adopted, ensure natural rhythm and meet real-time performance, switch to motion compensation inserting frames when the motion is in medium-high motion or multi-frame insertion is needed, reconstruct an intermediate state according to displacement, continuously restore a motion track, and restrain jitter and tailing. When executing the motion compensation frame inserting strategy, the frame inserting method carries out afterglow compensation on the inserted frame, and avoids phenomena of smear, ghost, local brightness overexposure and the like when playing high-speed moving pictures caused by inherent afterglow effect of LED pixel points in the LED display device.

Inventors

LI SU
LIU HU
Qin Yuebin
WANG BIAO
WANG XIA
WANG MENG
CHEN PENG
WAN CHENGWEI

Assignees

上海三思电子工程有限公司
上海三思科技发展有限公司
嘉善三思光电技术有限公司
浦江三思光电技术有限公司
浙江浦照光电技术有限公司
北京航天飞行控制中心

Dates

Publication Date: 20260512
Application Date: 20250915

Claims (10)

1. A video frame rate adjustment method based on an LED display device, comprising: The method comprises the steps of obtaining an original frame rate of a video and motion intensity of a frame Fn+1 relative to the frame Fn, wherein the motion intensity comprises a first motion intensity matrix A of each pixel block in the frame Fn+1 relative to a corresponding pixel block of the frame Fn and a second motion intensity value B of a whole frame picture of the frame Fn+1 relative to the frame Fn; calculating a target refresh rate based on the second motion intensity value B; And when the target refresh rate is greater than the original frame rate, carrying out frame supplementing and calculating the number of the frame supplementing, wherein the frame supplementing is to add a plurality of inserted frames between the frame Fn and the frame Fn+1, the number of the frame supplementing is the number of the inserted frames, and a corresponding frame supplementing strategy is selected according to the second motion intensity value B.
2. The method of claim 1, wherein the frame-up strategy comprises a frame repetition strategy and a motion compensated interpolation strategy.
3. The method for adjusting video frame rate based on an LED display device of claim 2, wherein when the selected frame filling strategy is a motion compensated frame filling strategy, the method for persistence compensation comprises adjusting a luminance value of the inserted frame based on an effect of persistence of frame Fn on the inserted frame.
4. A method for adjusting the video frame rate of an LED display device according to claim 3, wherein said method for adjusting the luminance value of said inserted frame based on the effect of the persistence of frame Fn on said inserted frame comprises: Determining a high motion area in the frame Fn according to the first motion intensity matrix A, wherein the high motion area is an area in the frame Fn, and the motion intensity of the area is larger than a preset first threshold value; Setting a mask in the insertion frame, and adjusting brightness values only for a first area displayed after the mask, wherein the first area is a position area corresponding to the high-motion area; and reducing the brightness of pixels in an edge area of a moving object in the inserted frame in the first area, wherein the moving object is a connected area identified after cluster analysis of the high-motion area.
5. The method for adjusting video frame rate based on an LED display device according to claim 4, wherein the method for calculating the pixel brightness value after brightness reduction in the edge region comprises: Where L1 is a pixel luminance value after the edge region luminance is reduced, L0 is a pixel luminance value before the edge region luminance is reduced, k is a decay coefficient controlling the extent of the effect of persistence, τ is a persistence time constant, and Δz is a time interval from a time point corresponding to the insertion frame to a time point corresponding to the frame Fn.
6. The method for adjusting video frame rate based on an LED display device according to claim 2, wherein the method for selecting a corresponding frame interpolation strategy according to the second motion intensity value B includes selecting a frame repetition strategy to perform frame interpolation when the second motion intensity value B is smaller than a preset second threshold and the number of the inserted frames is 1, and selecting a motion compensation frame interpolation strategy to perform frame interpolation when the second motion intensity value B is greater than or equal to the second threshold or the number of the inserted frames is not 1.
7. A video frame rate adjustment system based on an LED display device, comprising: the data acquisition module is used for acquiring the original frame rate of the video and the motion intensity of the frame Fn+1 relative to the frame Fn, wherein the motion intensity comprises a first motion intensity matrix A of each pixel block in the frame Fn+1 relative to a corresponding pixel block of the frame Fn and a second motion intensity value B of the whole frame picture of the frame Fn+1 relative to the frame Fn; a target refresh rate calculation module, configured to calculate a target refresh rate based on the second motion intensity value B; And the frame supplementing processing module is used for supplementing frames and calculating the number of the frames when the target refresh rate is larger than the original frame rate, wherein the frames are a plurality of inserted frames added between the frames Fn and the frames Fn+1, the number of the frames is the number of the inserted frames, and a corresponding frame supplementing strategy is selected according to the second motion intensity value B.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the method of any of claims 1-6.
9. A computer program product comprising computer program code embodied therein, which when run on a computer causes the computer to carry out the method according to any of claims 1-6.
10. An electronic terminal comprising a memory, a processor and a computer program stored on the memory, characterized in that the processor executes the computer program to implement the method of any of claims 1-6.

Description

Video frame rate adjusting method, system, medium, program and terminal based on LED display device Technical Field The application relates to the technical field of LED display, in particular to a video frame rate adjusting method, a system, a medium, a program and a terminal based on an LED display device. Background The existing LED screen generally adopts a fixed refresh rate, in some specific scenes such as high-speed motion scenes of sports events or rocket launching and the like, the human eye temporary effect causes dynamic definition degradation, the high-dynamic scene is seriously smeared, and for some static scenes, the fixed high refresh rate can increase the power consumption of a static picture by 30% -50%, so that the energy waste is serious, the LED components are fast in aging, the cost is increased, and the development trend of the green energy-saving display screen industry is not facilitated. Therefore, the original frame needs to be reduced or complemented. The traditional frame rate conversion technology adopts a fixed frame inserting strategy, can not be dynamically optimized according to the content, and generally adopts a simple frame repeating strategy when frame supplementing is needed, so that a picture is blocked, the calculated amount of the general algorithm frame inserting (such as frame averaging) is large, the real-time performance on LED display (particularly high resolution) is poor, and ghost, edge tearing and picture jitter can be caused. In addition, since the LED pixels in the LED display device have an inherent afterglow effect, if a new frame generated based on pure image data operation is directly inserted when a high-speed moving picture is played, and the actual brightness residue which has not been attenuated in the previous frame (Fn) is ignored, the theoretical brightness of the inserted frame is overlapped with the current physical brightness of the screen, and the brightness mismatch causes a series of visual defects including phenomena of smear, ghost, local brightness overexposure, and the like. Disclosure of Invention In view of the above-described drawbacks of the prior art, an object of the present application is to provide a video frame rate adjustment method, system, medium, program and terminal based on an LED display device for solving the aforementioned problems. To achieve the above and other related objects, a first aspect of the present application provides a video frame rate adjustment method based on an LED display device, including obtaining an original frame rate of a video and a motion intensity of a frame fn+1 relative to the frame Fn, where the motion intensity includes a first motion intensity matrix a of each pixel block in the frame fn+1 relative to a corresponding pixel block of the frame Fn, and a second motion intensity value B of an entire frame of the frame fn+1 relative to the frame Fn, calculating a target refresh rate based on the second motion intensity value B, and performing a frame interpolation and calculating a number of frame interpolation when the target refresh rate is greater than the original frame rate, where the number of frame interpolation is a number of frame interpolation added between the frame Fn and the frame fn+1, and selecting a corresponding frame interpolation strategy according to the second motion intensity value B. In an embodiment of the first aspect of the present application, the frame-filling policy includes a frame repetition policy and a motion compensation frame insertion policy. In an embodiment of the first aspect of the present application, when the selected frame-compensating strategy is a motion-compensated frame-inserting strategy, performing persistence compensation on the inserted frame, wherein the persistence compensation method includes adjusting a luminance value of the inserted frame based on an effect of persistence of the frame Fn on the inserted frame. In an embodiment of the first aspect of the present application, the method for adjusting the luminance value of the inserted frame based on the effect of the afterglow of the frame Fn on the inserted frame includes determining a high motion area in the frame Fn according to the first motion intensity matrix a, wherein the high motion area is an area in the frame Fn where the motion intensity is greater than a preset first threshold value, setting a mask in the inserted frame, and adjusting the luminance value only for a first area displayed after the mask, wherein the first area is a location area corresponding to the high motion area, and performing luminance reduction on pixels of an edge area of a moving object in the inserted frame in the first area, wherein the moving object is a connected area identified after performing cluster analysis on the high motion area. In an embodiment of the first aspect of the present application, the method for calculating the pixel brightness value after the brightness of the edge area is redu