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Image information encoding and decoding method

專利號
US10091505B2
公開日期
2018-10-02
申請人
LG ELECTRONICS INC.（KR Seoul）
發(fā)明人
Seung Wook Park; Jae Hyun Lim; Jung Sun Kim; Joon Young Park; Young Hee Choi; Byeong Moon Jeon; Yong Joon Jeon
IPC分類
H04N19/117; H04N19/82; H04N19/70; H04N19/186; H04N19/176; H04N19/14; H04N19/139; H04N19/91; H04N19/13
技術(shù)領(lǐng)域
sao,offset,chroma,band,pixels,pixel,prediction,bands,picture,in
地域： Seoul

摘要

The present invention relates to an image information encoding and decoding method and a device for same. One embodiment of an image information encoding method according to the present invention, as an image information encoding method according to another embodiment of the present invention, includes the steps of: generating a restore block; applying a deblocking filter on the restore block; applying a Sample Adaptive Offset (SAO) on the restore block having the deblocking filter applied thereon; and transmitting information on the SAO application. During the applying of the SAO, the SAO is applied to chroma pixels, and during the transmitting of the information, in addition to information on whether the SAO is applied on the chroma pixels, at least one of area information, division information on the SAO coverage area, SAO type information, and SAO offset information is transmitted.

說明書

SUMMARY OF THE INVENTION Technical Problem

An object of the invention is to provide a method of adaptively applying an SAO to improve an picture reconstruction effect.

Another object of the invention is to provide a method of applying an SAO in consideration of an occurrence frequency of a pixel by intensity.

Still another object of the invention is to provide a method of transmitting information for applying an SAO to only an effective band from an encoder to a decoder.

Still another object of the invention is to provide a method of applying plural SAOs depending on an SAO application unit.

Still another object of the invention is to provide a method and a device for applying an SAO on chroma pixels so as to enhance a shape reconstruction effect.

Still another object of the invention is to provide a method of applying an SAO in consideration of characteristics of chroma pixels.

Solution to Problem

(1) According to an aspect of the invention, there is provided a video information encoding method including the steps of: generating a reconstructed block; applying a deblocking filter to the reconstructed block; applying a sample adaptive offset (SAO) to the reconstructed block to which the deblocking filter has been applied; and transmitting information on the application of the SAO, wherein the step of applying the SAO includes adaptively applying the SAO depending on an SAO application region to which the SAO will be applied.

權(quán)利要求

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