A New Deinterlacing Method Based on Motion Compensation for Overlapped Blocks

A motion compensation and de-interlacing technology, applied in the field of de-interlacing, to achieve the effect of improving interpolation accuracy, reducing computational complexity, and reducing data volume

Active Publication Date: 2019-02-15
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a new block overlapping motion compensation de-interlacing method that can provide better de-interlacing effect under the condition of lower computational complexity

Method used

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  • A New Deinterlacing Method Based on Motion Compensation for Overlapped Blocks
  • A New Deinterlacing Method Based on Motion Compensation for Overlapped Blocks
  • A New Deinterlacing Method Based on Motion Compensation for Overlapped Blocks

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Embodiment approach

[0056] 1. For the first field of the interlaced scanning video sequence, the line average interpolation algorithm is used for interpolation to obtain the reconstructed image, and a field to be interpolated and a reference frame are selected, wherein the reference frame is the previous one temporally adjacent to the field to be interpolated Reconstruct the image. The calculation expression of row average algorithm is shown in formula (1).

[0057] 2. Select the block to be matched from the field to be interpolated. The size of the block to be matched is 4×3. The uppermost row and the lowermost row are the positions of the original pixels, and the middle row is the position of the missing pixels. When the block to be matched is selected next time, two adjacent blocks to be matched in the vertical direction share one line, that is, the bottom line of the block to be matched above and the top line of the block to be matched below are the same line, as figure 1 shown.

[0058] 3....

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Abstract

Disclosed is a novel block overlapped motion compensation deinterlacing method. The method comprises the following steps: for a first field of an interlacing scanning video sequence, performing interpolation by use of field information to obtain a reconstruction image, and selecting a reference frame and a field to be interpolated; selecting a block to be matched from the field to be interpolated, wherein an odd-numbered row in the block to be matched is an original pixel point position, an even-numbered row is a pixel point position to be interpolated, and when the block to be matched is selected next time, two adjacent matching blocks in a longitudinal direction share one row; selecting one rectangular search window from the reference frame to enable the position of a matching block to be corresponding to the center position of the rectangular search window; finding an optimal matching block in the rectangular search window; obtaining an interpolation value of a motion compensation interpolation point by use of a row average algorithm; stopping error transmission by use of median filtering mode; and processing boundary conditions of the field to be interpolated. The method solves the problems of error transmission, quite low interpolation precision and quite high calculation complexity of a conventional block overlapped motion compensation deinterlacing algorithm, and provides a good deinterlacing effect under the condition that the calculation complexity is reduced.

Description

technical field [0001] The invention relates to a de-interlacing method in video processing. In particular, it concerns a new method of block overlapping motion compensated deinterlacing. Background technique [0002] Currently, some mainstream broadcast television systems process video signals in an interlaced format. For some playback devices that only support progressive scanning, this involves the format conversion process of video signals from interlaced scanning to progressive scanning. This format conversion process is called deinterlacing. Interlacing can cause visual artifacts such as flickering between lines, jaggies, crawling, and feathering. Therefore, the purpose of deinterlacing is to interpolate missing pixel values ​​and remove visual artifacts caused by interlacing. [0003] For deinterlacing research, predecessors have done a lot of work and proposed various deinterlacing algorithms. This mainly includes spatial interpolation, time domain interpolation,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N7/01H04N5/14
CPCH04N5/14H04N7/012
Inventor 张涛陈有志
Owner TIANJIN UNIV
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