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A Fast Hevc Interframe Coding Method

An inter-frame coding and fast technology, applied in the field of video coding, can solve the problem of high rate-distortion cost, and achieve the effect of improving coding speed, saving sub-pixel search time, and avoiding invalid calculation.

Active Publication Date: 2020-09-18
HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the MV of the Pb0 block and Pb1 block are the same, the Rect prediction result is the same as the 2Nx2N mode, but more bits are needed to encode the MV and the division mode, so the rate-distortion cost of the Rect prediction mode is almost certainly greater than 2Nx2N. At this time The calculation of Rect is an invalid calculation, and the traditional method cannot effectively avoid these invalid calculations

Method used

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  • A Fast Hevc Interframe Coding Method

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Embodiment Construction

[0022] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0023] Such as figure 1 In the described embodiment, a fast HEVC inter-frame coding method, the specific implementation steps are as follows:

[0024] (1) When each CU starts the inter-mode selection, perform an integer pixel search and a sub-pixel search for the prediction block of the 2Nx2N mode, determine the final MV and matching block, and calculate the rate-distortion cost, mark it as cost_2Nx2N, and execute the step ( 2);

[0025] (2) Perform whole-pixel search and sub-pixel search on the Pb0 block in Nx2N mode, find the motion vector, mark it as mv00, and perform step (3);

[0026] (3) Perform a whole-pixel search on the Pb1 block in Nx2N mode to obtain the whole-pixel motion vector, which is marked as mv01, when |mv00-mv01| <TH1, terminate the motion estimation early, and mark the rate-distortion cost cost_Nx2N of the Nx2N mode as infinite, and go to step ...

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Abstract

The invention discloses a fast HEVC inter-frame coding method, which determines whether to terminate the motion estimation in advance by obtaining the result of the integer pixel search of the Pb1 block in the Rect mode prediction, and the termination of motion estimation in advance refers to: determining whether the integer pixel motion vector of the Pb1 block and the motion vector trend of Pb0 is consistent after completing the integer pixel search of the Pb1 block, if so, determining that the current prediction mode belongs to an invalid calculation, and skipping the sub-pixel search of thePb1 block. The method has the beneficial effects that the pixel search time of the Pb1 block is saved, thereby avoiding a large number of invalid calculations and improving the overall coding speed.

Description

Technical field [0001] The present invention relates to the technical field related to video coding, in particular to a fast HEVC inter-frame coding method. Background technique [0002] Compared with the previous generation of video coding standard H.264, the compression efficiency of the new generation video coding standard HEVC has increased by 50%. It can save a lot of network bandwidth while providing the same video quality. It is very suitable for the promotion of 4K, 3D Blu-ray and other video content. . [0003] The basic premise of video coding and compression is that there is correlation between pixels. There are many neighboring pixels within a frame of image that have similar or identical data. This is spatial redundancy, and the data between adjacent frames in the video also has many similarities or Repetition, this is temporal redundancy, coding and compression is to remove these redundant information in the data, intra-frame prediction technology can remove spatial ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/503H04N19/147H04N19/109H04N19/51
CPCH04N19/109H04N19/147H04N19/503H04N19/51
Inventor 廖义李日谢亚光
Owner HANGZHOU ARCVIDEO TECHNOLOGY CO LTD
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