Video encoder based on lifting transforms on graphs

We propose a complete video encoder based on directional "non- separable" transforms that allow spatial and temporal correlation to be jointly exploited. These lifting-based wavelet transforms are applied on graphs that link pixels in a video sequence based on motion information. In this p...

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Bibliographic Details
Main Authors: Martinez-Enriquez, E., Diaz-de-Maria, E., Ortega, Antonio
Format: Conference Proceeding
Language:English
Subjects:
Complexity theory
Discrete cosine transforms
Graphs
Image coding
Lifting
MCTF
Reliability
Vectors
Video coding
Wavelet transforms
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Description
Summary:We propose a complete video encoder based on directional "non- separable" transforms that allow spatial and temporal correlation to be jointly exploited. These lifting-based wavelet transforms are applied on graphs that link pixels in a video sequence based on motion information. In this paper, we first consider a low complexity version of this transform, which can operate on subgraphs without significant loss in performance. We then study coefficient reordering techniques that lead to a more realistic and efficient encoder that the one we presented in our earlier work. Our proposed technique shows encouraging results as compared to a comparable scheme based on the DCT transform.
ISSN:1522-4880
2381-8549
DOI:10.1109/ICIP.2011.6116471