Loop filtering method and device, encoder and decoder for HEVC

Abstract

A loop filtering method and device for HEVC, an encoder and a decoder, the device comprising: a first storage module, adapted to store the horizontally filtered data of the previous row above the current CTU; a second storage module, adapted to Store data in the rightmost 4 columns on the left of the current CTU; the third storage module is suitable for storing data without deblocking filtering; the read-write module is suitable for reading data from the first, second and third storage modules forming a deblocking basic unit and storing it in the first registering module; writing the data of the filtered deblocking basic unit stored in the first registering module into a corresponding storage module; the first registering module is suitable for storing before and after filtering The deblocking effect basic unit; the first filtering operation module, adapted to filter the deblocking effect basic unit in the first registration module, and output to the first registration module; the first control module, suitable for scheduling and controlling reading and writing module and the first filtering operation module. The scheme can reduce hardware overhead.

Description

technical field [0001] The present invention relates to the technical field of video coding, in particular to a loop filtering method and device, an encoder and a decoder for High Efficiency Video Coding (HEVC). Background technique [0002] HEVC is a next-generation international video coding standard jointly developed by the International Telecommunication Union (ITU) and the Moving Picture Experts Group (MPEG). Compared with the existing international standard H.264 / AVC, HEVC can reduce the bit rate of video by 50% under the premise of ensuring image quality, that is to say, it can achieve twice the coding efficiency of H.264. [0003] As a new generation of video compression standard, HEVC is widely used in ultra-high-definition video because of its superior compression performance. While HEVC improves the compression rate, its computational complexity also increases accordingly. Moreover, because ultra-high-definition video images have a resolution of 4Kx2K pixels, wh...

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Problems solved by technology

[0005] The above scheme requires multiple sets of parallel deblocking filter operation units and multiple dual-port random access memories (Random Access Memory, RAM), so the hardware overhead is relatively large

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