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

Abstract

The present application relates to a loop filtering method, a loop filtering device, electronic equipment and a readable medium. The loop filtering method includes: setting a virtual boundary outside the actual boundary of the coding tree unit according to the filter size and shape; filling virtual pixel samples between the actual boundary and the virtual boundary; and when the coding tree unit When loop filtering is performed on multiple pixels in , the virtual pixel samples are used to replace pixels outside the actual boundary of the coding tree unit to perform loop filtering. This method sets a virtual boundary outside the actual boundary, and sets virtual pixel samples between the virtual boundary and the actual boundary, so that when adaptive loop filtering is performed, virtual pixel samples can be used to solve the data dependence between coding tree units .

Description

technical field [0001] The present application belongs to the field of video image processing, in particular to a loop filtering method, a loop filtering device, electronic equipment and a readable medium. Background technique [0002] In video coding technology, loop filtering is one of the important technologies. This technology 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. 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 Unit, LCU), also known as coding tree blocks (Coding Tree Unit, CTU) . In the...

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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