Title :
Edge-adaptive transforms for efficient depth map coding
Author :
Shen, G. ; Kim, W.-S. ; Narang, S.K. ; Ortega, A. ; Lee, Jaejoon ; Wey, Hocheon
Author_Institution :
Signal & Image Process. Inst., Univ. of Southern California, Los Angeles, CA, USA
Abstract :
In this work a new set of edge-adaptive transforms (EATs) is presented as an alternative to the standard DCTs used in image and video coding applications. These transforms avoid filtering across edges in each image block, thus, they avoid creating large high frequency coefficients. These transforms are then combined with the DCT in H.264/AVC and a transform mode selection algorithm is used to choose between DCT and EAT in an RD-optimized manner. These transforms are applied to coding depth maps used for view synthesis in a multi-view video coding system, and provides up to 29% bit rate reduction for a fixed quality in the synthesized views.
Keywords :
discrete cosine transforms; video coding; H.264-AVC; RD-optimized manner; depth map coding; edge-adaptive transforms; image coding applications; multiview video coding system; standard DCT; transform mode selection algorithm; Multiview plus depth (MVD); depth coding; rate-distortion optimization;
Conference_Titel :
Picture Coding Symposium (PCS), 2010
Conference_Location :
Nagoya
Print_ISBN :
978-1-4244-7134-8
DOI :
10.1109/PCS.2010.5702565