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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

With reference to Table 13 and Tables 8 to 11, when the value of sao_type_idx is less than 5, the edge offset is applied. Here, num_edge_offset indicates the total number of offsets of the edge offset.

With reference to Table 13, the edge offsets corresponding to the number indicated by num_edge_offset may be applied to the SAO application region.

<SAO Application to Chroma>

On the other hand, in consideration of the difference between luma and chroma in applying the SAO, the SAO may be applied to chroma pixels.

FIG. 11 illustrates local distributions of histograms for the same picture.

For example, FIG. 11(b) illustrates a histogram difference between a luma original picture and a reconstructed picture in Regions A and B in FIG. 11(a) which is in a picture of the same video.

FIG. 11(c) illustrates a histogram difference between a chroma (Cr) original picture and a reconstructed picture in Regions A and B in FIG. 11(a). FIG. 11(d) illustrates a histogram difference between a chroma (Cb) original picture and a reconstructed picture in Regions A and B in FIG. 11(a).

權(quán)利要求

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