Open AccessAdaptive Scanning Based on a Morphological Representation of Coefficients for H.264/AVC
Author(s) -
Choi KangSun,
Ko SungJea
Publication year - 2009
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.09.0209.0263
Subject(s) - zigzag , residual , block (permutation group theory) , dilation (metric space) , coding (social sciences) , algorithm , position (finance) , mathematics , representation (politics) , computer science , geometry , statistics , politics , political science , law , finance , economics
In this letter, an effective scanning method based on a morphological representation of quantized coefficients is proposed for intra coding in H.264. In the proposed scanning method, the scan order for each block is adaptively reconfigured by exploiting a residual correlation beyond the border of the block. An initial scan order for the current block is determined first by using the pattern of nonzero coefficients in the adjacent block. Then, a complete scan order is obtained by performing the dilation operation at each position within the initial scan order. Experimental results show that the proposed method improves the coding efficiency up to 3.7% compared to the conventional zigzag scanning method.