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HEVC inter-frame prediction mode selection method and device

An inter-frame prediction mode and inter-prediction technology, applied in the field of video coding, can solve the problems of high computational complexity, time-consuming, unfavorable applications, etc., and achieve the effect of reducing computational complexity, improving processing speed, and ensuring compression efficiency and

Active Publication Date: 2018-03-23
ZHEJIANG DAHUA TECH CO LTD
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Problems solved by technology

However, when calculating the rate-distortion cost, a series of processes such as prediction, transform and quantization, entropy coding, inverse transform and inverse quantization, and reconstruction are required for the current CU. The computational complexity is too high and time-consuming, which is not conducive to practical applications.

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  • HEVC inter-frame prediction mode selection method and device

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Embodiment Construction

[0024] In order to reduce the complexity of inter-frame prediction mode selection and improve processing efficiency, embodiments of the present invention provide a HEVC inter-frame prediction mode selection method and device.

[0025] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0026] The core idea of ​​the inter-frame mode selection provided by the embodiment of the present invention is: by comparing the first rate-distortion cost calculated based on the Sum of Absolute Difference (SAD) of various inter-frame prediction modes, and calculating the optimal and secondary The ratio of the difference between the optimal first rate-distortion cost and the optimal first rate-distortion cost, by setting a threshold, if the ratio satisfies the threshold condition, the optimal inter-frame prediction mode is obtained directly through the first rate-distortion cost, Otherwise, perform the second SSE-bas...

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Abstract

The invention discloses a HEVC inter-frame prediction mode selection method and device, which are used to reduce the complexity of inter-frame prediction mode selection and improve processing efficiency. The method is: when determining that the pixel size of the coding unit CU block of the current frame is within a set range, calculate and obtain the first rate-distortion cost of each inter-frame prediction mode of the CU block based on the absolute error and the SAD algorithm; according to the obtained The first rate-distortion cost of each inter-frame prediction mode, the optimal first rate-distortion cost SadCost0 and the corresponding first inter-frame prediction mode and the suboptimal first rate-distortion cost SadCost1 and the corresponding second inter-frame prediction mode ; When it is determined that (SadCost1-SadCost0) / SadCost0 is greater than a threshold, select the first inter-frame prediction mode as the optimal inter-frame prediction mode of the CU block.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a method and device for selecting an inter-frame prediction mode of the High Efficiency Video Coding (HEVC) standard. Background technique [0002] HEVC, a new generation of high-efficiency video coding standard, focuses on processing high-definition ultra-high-definition video and parallel processing architecture. performance. However, while HEVC improves coding efficiency, it also greatly increases coding complexity. [0003] At present, research on open algorithms for all HEVC encoders basically takes the HEVC Test Model (HEVCTest Model, HM for short) project as a reference model. The basic coding unit of the HEVC encoder is LCU (Large CodingUnit), and the depth of the LCU is defined as 0. For the LCU unit, whether to further divide the quadtree (the width and height are half of the previous division) into four CUs (Coding Unit) is determined by calculating and...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04N19/109H04N19/147
Inventor 黄志伟林聚财王叶群刘文尧尤冬张兴明
Owner ZHEJIANG DAHUA TECH CO LTD
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