Open AccessAdaptive Scanning for H.264/AVC Intra Coding
Author(s) -
Lee YungLyul,
Han KiHun,
Sim DongGyu,
Seo Jeongil
Publication year - 2006
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.06.0206.0095
Subject(s) - zigzag , coding (social sciences) , context adaptive variable length coding , computer science , bit rate , 3d scanning , block (permutation group theory) , algorithm , context adaptive binary arithmetic coding , mathematics , computer vision , geometry , data compression , real time computing , statistics
In this letter, an adaptive scanning that improves intra coding efficiency in the H.264/AVC standard is proposed. The proposed adaptive scanning utilizes the prediction directions (modes) that include the horizontal and vertical edge information in a block. Depending on the prediction directions, the proposed method uses three scanning methods: zigzag scanning, horizontal scanning, and vertical scanning. In the proposed method, horizontal and vertical scanning are used in vertical and horizontal prediction modes, respectively, and the normal zigzag scanning in the H.264 standard is used in all other intra prediction modes. The proposed method reduces the bit rate by approximately 2.5% compared with H.264/AVC, without the degradation of video quality.