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Deblocking method, deblocking device, deblocking program, and computer-readable recording medium containing the program

A technology of block processing and object processing, which is applied in the direction of TV, electrical components, pulse modulation TV signal transmission, etc., can solve the problems of coding efficiency reduction, residual signal increase, image quality deterioration, etc., to achieve coding efficiency, residual signal Reduce and achieve the effect of subjective image quality

Active Publication Date: 2011-09-14
NIPPON TELEGRAPH & TELEPHONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when coding at a low bit rate, there is a problem that block distortion occurs, the decoded image deteriorates, and image quality degradation is propagated by referring to the deteriorated image.
In this motion-compensated inter-picture predictive coding, when the reference image is degraded by blocky noise and the difference between the reference frame and the processing target frame is obtained, the residual signal increases and becomes results in reduced coding efficiency

Method used

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  • Deblocking method, deblocking device, deblocking program, and computer-readable recording medium containing the program
  • Deblocking method, deblocking device, deblocking program, and computer-readable recording medium containing the program
  • Deblocking method, deblocking device, deblocking program, and computer-readable recording medium containing the program

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Experimental program
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no. 1 approach 〕

[0116] First, the deblocking processing device 1 according to the first embodiment of the present invention will be described first.

[0117] image 3 The configuration of the deblocking processing device 1 according to the first embodiment of the present invention is illustrated.

[0118] The deblock processing device 1 uses Figure 24A , Figure 24B The form as shown is implemented in a video encoding device and a video decoding device. like image 3 As shown, the deblocking processing device 1 according to the present embodiment is composed of the following parts: the edge detection unit 10 derives the edge component in the block used by the pixel determination unit 40, and detects the direction of the edge in the block; edge direction information The storage unit 20 stores the detection result of the edge detection unit 10; the filter processing pixel determination information storage unit 30 stores information used to determine the pixel (filter processing pixel) to be...

no. 2 approach 〕

[0222] Next, a deblocking device 1 according to a second embodiment of the present invention will be described.

[0223] In the first embodiment of the present invention, since the deblocking process is performed using pixels arranged on a straight line perpendicular to the direction of the edge, the image quality can be improved for an image having a slanted edge. However, for images with complex textures, it is also necessary to consider the deterioration of image quality due to frames.

[0224] Therefore, in the second embodiment, taking this point into consideration, a configuration is adopted in which the strength of an edge is obtained for each block, and the processing target block having a large edge strength obtained has a strongly inclined (clear) edge. The image is deblocked using the same deblocking filter as in the first embodiment. On the other hand, regarding the obtained block with a small edge strength, that is, an image with a complex texture or a weak edge (...

no. 3 approach 〕

[0250] Next, a deblocking processing device 1 according to a third embodiment of the present invention will be described.

[0251] The difference between the present embodiment and the second embodiment lies in that the detection method of the edge direction corresponding to step S701 and the determination method using the edge intensity corresponding to step S703 are different. In addition, the configuration of the deblocking processing device according to the present embodiment is the same as that of the deblocking processing device according to the second embodiment (refer to Figure 20 ) have the same composition.

[0252] First, follow the Figure 23 The flow chart of , will describe the modification content of step S701 in detail. In this embodiment, the direction of an edge is detected using intra-prediction information.

[0253] In the following, unless otherwise specified, the block size is 4×4, and the processing target is a luminance signal. In addition, four di...

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Abstract

Provided is a deblocking method including: a step of detecting the direction of the edge indicating the change direction of a pixel value of each block; a step of determining the direction of a deblocking filter to be applied to a block boundary in accordance with the edge direction detected a process object block having a block boundary to be subjected to deblocking and a block in contact with the process object block; and a step of applying the deblocking filter to the block boundary in accordance with the determined direction.

Description

technical field [0001] The present invention relates to a deblocking processing method used in a video encoding device and a video decoding device equipped with a block basis (block basis) predictive coding and its device, a deblocking processing program for realizing the deblocking processing method, and A computer-readable recording medium on which the program is recorded. [0002] This application claims priority based on Japanese Patent Application No. 2008-271496 for which it applied in Japan on October 22, 2008, and uses the content here. Background technique [0003] In video coding, in inter-picture predictive coding (motion compensation) in which prediction is performed between different pictures, a decoded picture is used as a reference picture. Therefore, when encoding is performed at a low bit rate, there is a problem that block distortion occurs, a decoded image deteriorates, and image quality deterioration is propagated by referring to the deteriorated image. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/30H04N7/32
CPCH04N19/00781H04N19/00278H04N19/00303H04N7/26207H04N19/00157H04N7/26244H04N19/00896H04N19/00066H04N7/26058H04N7/26127H04N7/50H04N19/00212H04N7/26888H04N19/00909H04N7/26382H04N7/26255Y02E60/366H04N19/117H04N19/14H04N19/157H04N19/176H04N19/182H04N19/82H04N19/86
Inventor 松尾翔平高村诚之上仓一人八岛由幸
Owner NIPPON TELEGRAPH & TELEPHONE CORP