Loop filtering method, loop filtering device, electronic equipment and readable medium

Abstract

The application relates to a loop filtering method, a loop filtering device, a piece of electronic equipment and a readable medium. The loop filtering method includes the following steps: setting a virtual boundary outside the actual boundary of a coding tree unit according to the size and shape of a filter; filling the gap between the actual boundary and the virtual boundary with virtual pixel samples; and using the virtual pixel samples instead of the pixels beyond the actual boundary of the coding tree unit to carry out loop filtering on the multiple pixels in the coding tree unit. According to the method, a virtual boundary is set outside the actual boundary, and virtual pixel samples are set between the virtual boundary and the actual boundary, so that virtual pixel samples can be used in adaptive loop filtering, and the problem of data dependence between coding tree units is solved.

Description

technical field [0001] The present application belongs to the field of video image processing, and in particular, to a loop filtering method, a loop filtering device, an electronic device and a readable medium. Background technique [0002] In video coding technology, loop filtering is one of the important technologies. This technique filters the reconstructed image by encoding the filter coefficients to reduce the compression distortion in the image. Before HEVC Test Model 7 (HM-7), a loop filtering technique, called Adaptive Loop Filtering (ALF), was included in the test model. To optimize performance, ALF uses Wiener filtering techniques to derive filter coefficients. The filter coefficients are encoded in an Adaptation Parameter Set (APS). [0003] According to High Efficiency Video Coding (HEVC), a picture (image frame) is divided into multiple non-overlapping largest coding units (Largest Coding Units, LCUs), also known as Coding Tree Units (CTUs) . In the adaptiv...

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problems existing in the related technologies, the present application discloses a loop filtering method, a loop filtering device, electronic equipment, and a readable medium. The loop filtering method sets a virtual boundary outside the coding tree unit to solve the filter The problem of data dependence when filtering

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