Frame rate up conversion-oriented motion estimation method

A technology of motion estimation and frame rate, which is applied in television, electrical components, digital video signal modification, etc., to achieve the effect of easy logic implementation, simple and effective implementation, and guaranteed continuity

Inactive Publication Date: 2011-02-09
SHANGHAI UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004]However, the interpolation video quality of the motion compensation interpolation algorithm ultimately depends on the accuracy of the motion estimation, specifically in the time spent on frame processing and the signal-to-noise ratio of the interpolated frames , the time is mainly spent on searching for the optimal matching block of the target block

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  • Frame rate up conversion-oriented motion estimation method

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Embodiment 1

[0051] Embodiment one: see figure 1 , figure 2 and Figure 4 , a frame rate up-conversion-oriented motion estimation method for frame rate up-conversion, which is characterized in that the current frame of the video stream is divided into several blocks by using the principle of H.264 / AVC variable blocks, and obtained by static detection Whether each block is static or moving, if the target block is relatively moving, then process the target block to obtain its motion vector.

Embodiment 2

[0052] Embodiment 2: This embodiment is basically the same as Embodiment 1, and the special features are as follows: the specific steps of obtaining whether each block is moving or still by static detection are as follows:

[0053] 1) Using the pixel comparison method, the current frame and reference frame of the input video stream are divided into target blocks of 16×16 pixels;

[0054] 2) The target block is compared with the corresponding block of the reference frame. If each pixel in the target block is equal to the corresponding pixel value of the corresponding block of the reference frame, then the target block is static relative to the corresponding block of the reference frame. The motion vector is 0;

[0055] The pixel threshold determination method and the search range expansion method in the reference frame in the step 3) can not only improve the calculation efficiency of the motion vector of relatively smaller blocks, but also can improve the accuracy of the motion...

Embodiment 3

[0057] Apply " motion estimation method " of the present invention to the post-processing of the decoded video stream as: see figure 1 Description This embodiment performs picture format conversion 1 (RGB_YUV), variable block motion estimation 2, motion compensation based on motion estimation 3, and picture format inversion 4 (YUV_RGB): variable block motion estimation is the technical solution of the present invention , including detection and processing of still regions 5, detection and processing of moving regions 6 and optimization of motion vectors 7.

[0058] Motion estimation based on variable blocks only needs to process the gray value of the image to determine the motion vector of the current frame. However, the input and output video streams are digital video signals in RGB format. Therefore, color space conversion and inverse conversion become an indispensable module of this embodiment. The present invention uses a color conversion algorithm to convert RGB signal...

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Abstract

The invention relates to a frame rate up conversion-oriented motion estimation method which comprises the following steps: dividing a current frame of a video stream into multiple blocks based on the principle of the H.264 / AV variable block, carrying out stationary detection to judge whether each block is stationary or movable, and processing a target block to obtain motion vectors of the target block if the target block is in the state of relative motion. For a high-definition or even ultra high-definition image and a high refresh rate, the invention can effectively ensure the continuity of motion vectors, thereby reducing the blocking effect, video blurring, object halation and the like of the image. The method is concise and effective, thereby facilitating the logical implementation of a large integrated circuit.

Description

technical field [0001] The invention relates to a motion estimation method for frame rate up-conversion, which uses the principle of H.264 / AVC variable blocks to divide the current frame of the video stream into several blocks, and obtains whether each block is in relative motion or relative motion through relative static detection. Stationary, and process the moving target block to obtain its accurate motion vector. This method effectively improves the calculation efficiency under the premise of ensuring the accuracy of the motion block. [0002] Background technique [0003] The decoded video stream needs video post-processing, that is, video quality enhancement processing, and the frame rate up-conversion algorithm is an important module in the video post-processing algorithm pipeline. Its main function is to adjust the frame rate of the original video source to the refresh rate of the display through interpolation. [0004] Frame rate up-conversion algorithms fall into...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/46H04N7/26H04N19/51H04N19/52
Inventor 赵景景杨胜齐刘道金
Owner SHANGHAI UNIV
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