Edge-adaptive transforms for efficient depth map coding

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...

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Bibliographic Details
Main Authors: Shen, G, Kim, W.-S, Narang, S K, Ortega, A, Jaejoon Lee, Hocheon Wey
Format: Conference Proceeding
Language:English
Subjects:
Bit rate
depth coding
Discrete cosine transforms
Encoding
Image edge detection
Laplace equations
Multiview plus depth (MVD)
Pixel
rate-distortion optimization
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Summary: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.
DOI:10.1109/PCS.2010.5702565