A Fast Hevc Encoding Method

Abstract

The invention discloses a fast HEVC encoding method. It specifically includes the following steps: (1) establish two threshold value arrays T_8x8 and T_16x16 indexed by the quantization parameter QP, and initialize T_8x8 and T_16x16 to 0; (2) set every N GOPs as a GOP group, the GOP group The first GOP is a statistical GOP, and all frames in the statistical GOP are normally encoded, and the value of the array element indexed by the quantization parameter QP in the threshold T_8x8 or T_16x16 is calculated; (3) the second to Nth GOPs in the GOP group are Fast coding GOP, fast coding of frames in GOP uses fast algorithm, if the conditions are met, directly select Merge&Skip_2Nx2N, skip the calculation of other subsequent prediction units; otherwise, it is necessary to calculate the RDCost of all prediction modes, and select the smallest RDCost as the prediction unit of the CU. The beneficial effect of the present invention is that the amount of calculation can be saved to the greatest extent, and at the same time, the encoding quality is basically not lost; when the present invention is applied to the general encoding quality level of the 265 encoder of ArcVideo, encoding time is saved by 7%, while BDRate only increases by 0.5%.

Description

technical field [0001] The present invention relates to the related technical field of video coding, in particular to a fast HEVC coding method. Background technique [0002] As the latest generation of video coding standard, HEVC doubles the compression efficiency of the previous generation coding standard H.264, and the coding complexity is also greatly improved. This is mainly due to the introduction of more complex coding techniques by HEVC: including larger and more flexible coding units, more types of prediction units, more refined prediction modes, and so on. Specifically: (1), HEVC upgrades the coding unit of H.264 from 16x16 to 64x64. In addition, HEVC supports recursive quadtree division from the largest coding unit into four sub-coding units. The minimum coding unit is 8x8, so HEVC can Select the optimal coding unit for the target scene according to the complexity of the scene texture, the magnitude of the motion, etc. to improve the compression efficiency, but a...

AI Technical Summary

Problems solved by technology

However, the current existing solutions generally need to complete the prediction modes of Skip&Merge_2Nx2N and Inter_2Nx2N, and in the real-time application of HEVC encoders, the SMP and AMP prediction modes are generally turned off, so the current solution has an effect on real-time encoding configuration. will not be optimal

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