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Up-conversion device and method of video frame rate

A technology of video frame rate and conversion device, which is used in standard conversion, digital video signal modification, TV and other directions, can solve problems such as matching errors, and achieve the effect of improving accuracy and avoiding filtering out texture and details.

Active Publication Date: 2013-07-24
PEKING UNIV
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AI Technical Summary

Problems solved by technology

The choice of the size of the motion block is very critical: if the image block is too large, it is easy to include moving objects and relatively static background; if the image block is too small, it is easy to cause matching errors

Method used

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  • Up-conversion device and method of video frame rate
  • Up-conversion device and method of video frame rate

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Embodiment Construction

[0051] In the present invention, motion vectors are obtained by using a motion estimation method based on a variable block size adaptive threshold, and erroneous motion vectors are filtered out by median filtering, and then the interpolated frames are reconstructed using the motion vectors, and finally the motion vectors are deblocked Filter and output the reconstructed image. Such as figure 1 As shown, the video frame rate up-conversion process mainly includes motion estimation, motion vector median filtering, interpolation frame reconstruction and deblocking filtering.

[0052] The device of the present invention only performs motion estimation search and motion vector filtering on the luma blocks, and the chrominance blocks use the motion vectors of the luma blocks.

[0053] In the motion estimation based on variable block size adaptive threshold, the image sequence is first divided into 16xl6 image blocks. Such as figure 2 As shown, image block B t For the frame F tha...

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Abstract

The invention discloses an up-conversion device and method of the video frame rate. The up-conversion device comprises an input-output module, a motion estimation module, a motion vector median filtering module, a reconfiguration module, a deblocking filtering module, a DDR and controller module, a state machine controlling module and the like. The device can improve the video frame rate and generates video with high quality. The up-conversion method includes the following steps of respectively conducting motion estimation on a forward frame and a backward frame of a reconfiguration frame; conducting a multi-frame extrapolation method and a direct interpolation method or conducting a method of motion estimation of the size and self-adaptive threshold judgment of a variable block according to comparison between SAD value (the sum of absolute values of differences) and threshold of a present block; obtaining initial motion vectors through the motion estimation and updating the threshold of the present image block; filtering motion vectors which is estimated mistakenly through a median filtering method based on a time domain and a space domain; and conducting reconfiguration and deblocking filtering and outputting results.

Description

technical field [0001] The invention relates to the technical field of digital video processing, in particular to a frame rate conversion device and method based on a variable block size adaptive threshold value motion estimation method. Background technique [0002] As a digital video pre-processing and post-processing technology, video frame rate up-conversion inserts intermediate frames between several known frames to convert a video from a lower frame rate to a higher frame rate. Wide range of applications. [0003] With the development of high-definition / ultra-high-definition digital TV and multimedia information systems, existing video program sources can no longer meet people's increasing demand for visual effects, and it is necessary to increase the frame rate of existing program sources to achieve better visual effects . [0004] In video and multimedia communications, bandwidth resources are limited. In order to meet such low-bandwidth applications, the frame ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/01H04N7/26H04N19/176H04N19/51H04N19/80H04N19/86
Inventor 贾惠柱贺志勇解晓东黄铁军高文
Owner PEKING UNIV
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