Image encoding/decoding method and device therefor

A decoding device and image technology, applied in image communication, digital video signal modification, electrical components, etc., can solve the problems of memory storage, memory access rate and processing power increase, and achieve the effect of enhancing compression performance

Active Publication Date: 2019-06-25
罗斯德尔动力有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To process such content would result in a dramatic increase in memory storage, memory access rate, and processing power

Method used

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  • Image encoding/decoding method and device therefor
  • Image encoding/decoding method and device therefor
  • Image encoding/decoding method and device therefor

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Experimental program
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Embodiment approach 1

[0290] Embodiments of the present invention propose a method for filtering boundary pixels when the intra-frame prediction (intra-picture prediction) of a non-square block is a DC mode.

[0291] as above Figure 7 and Figure 8 As described in , in case of DC mode filtering is performed for the left and top block boundaries. However, in HEVC, filtering is performed only for luma blocks with a block size of 16×16 or smaller.

[0292] Constraints need to be adaptively applied to non-square blocks. However, according to the method currently defined above, since the filtering of boundary pixels is only applied to blocks with a block size of 16×16 or smaller, the constraints may not be adaptively applied to blocks of 32×4, 4×32, 4×32, etc. Width length or height length. In order to solve such a problem, there is proposed a method for determining whether to perform filtering according to an adaptive condition when the prediction mode is the DC mode.

[0293] Figure 25 is a di...

Embodiment approach 2

[0304] Embodiments of the present invention propose a method for filtering boundary pixels when the intra prediction mode of a non-square block is a horizontal mode or a vertical mode.

[0305] as above Figure 9 Horizontal mode of HEVC as described in (or mode #17, #18 or #19 in the prediction method using 67 intra prediction modes) and as above Figure 10The vertical mode of HEVC (or mode #49, #50 or #51 in the prediction method using 67 intra prediction modes) described in is subject to block boundary pixel filtering.

[0306] However, filtering is not performed under all conditions, and in the following Figure 26 Filtering is performed only on blocks whose predicted block size is 16×16 or smaller under the illustrated conditions.

[0307] Figure 26 is a diagram illustrating boundary pixel filtering processing when the intra prediction mode is the horizontal / vertical mode according to an embodiment of the present invention.

[0308] refer to Figure 26 , when boundar...

Embodiment approach 3

[0326] Embodiments of the present invention propose intra prediction modes for non-square blocks when the total number of intra prediction modes is 2 or 34 when the total number of intra prediction modes is 35, and when the total number of intra prediction modes is 67. When the prediction mode is 2 or 66, the filtering method of the boundary pixels of the prediction block.

[0327] as above Figure 11 to Figure 16 The filter determination structure of the mode of filtering the boundary pixels belonging to the four lines around the block boundary described in , is partially modified and applied to the current QTBT structure. However, since such a determination structure is not optimized in the current QTBT structure, this embodiment proposes a method that can efficiently apply filtering of boundary pixels.

[0328] In the QTBT structure, due to the binary tree, the minimum block size may correspond to 4×N or N×4 in the case of luma, and may correspond to 2×N or N×2 in the case...

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Abstract

The present invention discloses an image encoding / decoding method and a device therefor. In detail, a method for decoding an image by means of a decoding device includes: a step for deriving an intra-prediction mode of a current block; a step for configuring reference samples from samples neighboring on the upper side of the current block and samples neighboring on the left side; a step for generating prediction samples of the current block by using the reference samples; and a step for filtering samples adjacent to the upper boundary and / or left boundary of the current block among the prediction samples, wherein, when the current block is a non-square block, whether or not to filter the samples adjacent to the upper boundary of the current block can be determined considering only the width of the current block, and whether or not to filter the samples adjacent to the left boundary of the current block can be determined considering only the height of the current block.

Description

technical field [0001] The present invention relates to a still image or moving image processing method, and more particularly, to a method for filtering prediction samples of intra-frame prediction and a device for supporting the method. Background technique [0002] Compression coding refers to a series of signal processing techniques for sending digitized information over communication lines, or for storing information in a form suitable for storage media. Media including pictures, images, audio, etc. may be objects for compression encoding, and in particular, a technique of performing compression encoding on pictures is called video image compression. [0003] Next-generation video content is assumed to be characterized by high dimensionality of scene representation, high spatial resolution, and high frame rate. To process such content would result in a dramatic increase in memory storage, memory access rate and processing power. [0004] Therefore, there is a need to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N19/117H04N19/11H04N19/176
CPCH04N19/176H04N19/11H04N19/117H04N19/159H04N19/80H04N19/593H04N19/132H04N19/44H04N19/96
Inventor 张炯文林宰显
Owner 罗斯德尔动力有限责任公司
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