A kind of qtbt fast judgment method and system based on kb filter

A filter and judgment technology, which is applied in the field of video coding, can solve problems such as the inability to meet high-definition video division requirements, and achieve the effects of reduced operations, reduced time, and reduced time

Active Publication Date: 2019-12-27
SUN YAT SEN UNIV
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Problems solved by technology

In addition, with the popularization of high-resolution video, the original 64x64 division can no longer meet the division requirements of high-definition video, so for the next-generation video coding standard, it is necessary to support a larger coding tree unit CTU (coding tree unit ) division, so in JEM4.0, the default coding tree unit CTU is 128x128, and can also support a larger 256x256 type

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  • A kind of qtbt fast judgment method and system based on kb filter
  • A kind of qtbt fast judgment method and system based on kb filter
  • A kind of qtbt fast judgment method and system based on kb filter

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Embodiment Construction

[0054] like figure 2 Shown, a kind of QTBT quick judgment method based on KB filter, the step of this method comprises:

[0055] Acquiring a first image, wherein the first image refers to a filtered image obtained after filtering the video frame image using a Ker-Bohme filter;

[0056] According to the block size of the current coding unit, select the corresponding high-frequency point threshold;

[0057] Finding the maximum value of high-frequency points in an image area, where the image area refers to an image area corresponding to the current coding unit in the first image;

[0058] Judging whether the maximum value of the high-frequency points found is less than the selected high-frequency point threshold, if so, jump out of the current coding unit division recursive program; otherwise, continue to divide the current coding unit recursively according to the QTBT algorithm.

[0059] like image 3 Shown, a kind of QTBT fast judgment system based on KB filter, this system...

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Abstract

The invention discloses a QTBT fast judgment method and system based on a KB filter. The system comprises an obtaining module, a selection module, a search module and a judgment module. The method comprises the following steps: carrying out filtering processing on a video frame image through the KB filter to obtain a filtered image; selecting a corresponding high frequency point threshold value; searching high frequency point maximum value of an image region; judging whether the searched high frequency point maximum value is smaller than the selected high frequency point threshold value; if so, jumping out of the current coding unit recursive partitioning program; or otherwise, carrying out recursive partitioning continuously on a current coding unit based on a QTBT algorithm. Through the method and system, whether the CU is subjected to recursive partitioning continuously can be pre-judged based on the image features, thereby greatly reducing video encoding time; and the QTBT fast judgment method and system based on the KB filter can be widely applied to the QTBT algorithm video coding field.

Description

technical field [0001] The present invention relates to video coding technology, in particular to a QTBT fast judgment method and system based on KB filter, which is applied in the division process of video coding unit CU. Background technique [0002] Explanation of technical terms: [0003] KB filter: The full name is the Ker-Bohme filter, which is a high-pass filter that is widely used in image steganalysis because of its superior performance in extracting image features. [0004] In 2015, the Video Coding Experts Group (VCEG) of the International Telecommunication Union Telecommunication Standardization Sector (ITU-T) and the Moving Picture Experts Group (MPEG) of the International Organization for Standardization / International Electrotechnical Commission (ISO / IEC) established the Joint Video Exploration Team ( JVET) Joint Video Research Working Group, which is mainly preparing for the next generation of video codecs. The working group's reference software JEM is a ser...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/117H04N19/119H04N19/169H04N19/192
CPCH04N19/117H04N19/119H04N19/169H04N19/192
Inventor 梁凡曾莉
Owner SUN YAT SEN UNIV
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