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Method, device and system for scanning conversion coefficient block

A technology of transform coefficients and scanning methods, applied in the field of communication, can solve the problems of high complexity of the coding end and affect the efficiency of compression and coding, and achieve the effect of improving the efficiency of compression and coding

Active Publication Date: 2014-06-04
HUAWEI TECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] Since at the encoding end of the video, it is necessary to select the mode among the three scanning modes, the complexity of the encoding end is high; in addition, the selection information of the scanning mode needs to be encoded into the code stream, which affects the compression encoding efficiency

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  • Method, device and system for scanning conversion coefficient block
  • Method, device and system for scanning conversion coefficient block
  • Method, device and system for scanning conversion coefficient block

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Embodiment Construction

[0074] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0075] During the inter-frame coding process, the coding end of the embodiment of the present invention selects the optimal inter-frame coding type from various inter-frame coding types according to the rate-distortion criterion for each block to be coded, and obtains motion information at the same time. and the encoded reconstructed frame information to obtain the predicted value of the block to be encoded, make a difference between t...

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Abstract

A scanning method, device and system for a transformation coefficient block, wherein the implementation of the method comprises: texture of an encoded block referenced by a block to be encoded or texture of a decoded block referenced by a block to be decoded is detected, and said texture reflects the changing rule of transformation coefficients in the transformation coefficient block of said block to be encoded or decoded in all directions; a scanning sequence corresponding to said texture is selected from preset candidate scanning sequences, and the transformation coefficient block of said block to be encoded or decoded is scanned according to the selected scanning sequence. In the solution above, scanning information does not need to be encoded into a code stream, and the compression encoding efficiency is improved.

Description

technical field [0001] The present invention relates to the field of communication technologies, and in particular, to a method and device for scanning transform coefficient blocks in video coding and decoding. Background technique [0002] Scanning of blocks of transform coefficients is an integral part of video coding techniques. The scanning of transform coefficient blocks has the following applications: the video encoding end scans the two-dimensional transform coefficient blocks in the transform domain after transformation, so that the two-dimensional transform coefficients in the transform coefficient blocks are converted into one-dimensional transform coefficients. Sequence of transform coefficients. In this process, the scanning order needs to be selected according to the transformation mode of the current transform coefficient block, so that the one-dimensional transform coefficient sequence obtained by scanning tends to be arranged from large to small, thereby imp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/61H04N19/122
CPCH04N19/00109H04N19/129
Inventor 宋锦杨名远
Owner HUAWEI TECH CO LTD
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