Transform coding of arbitrarily-shaped image segments
MULTIMEDIA '93 Proceedings of the first ACM international conference on Multimedia
DCT and wavelet based representations of arbitrarily shaped image segments
ICIP '95 Proceedings of the 1995 International Conference on Image Processing (Vol. 1)-Volume 1 - Volume 1
Region-adaptive transform based on a stochastic model
ICIP '95 Proceedings of the 1995 International Conference on Image Processing (Vol.2)-Volume 2 - Volume 2
Coding of segmented images using shape-independent basis functions
IEEE Transactions on Image Processing
Overview of the H.264/AVC video coding standard
IEEE Transactions on Circuits and Systems for Video Technology
Low-complexity transform and quantization in H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Variable block-size transforms for H.264/AVC
IEEE Transactions on Circuits and Systems for Video Technology
Context-based adaptive binary arithmetic coding in the H.264/AVC video compression standard
IEEE Transactions on Circuits and Systems for Video Technology
Shape-adaptive DCT for generic coding of video
IEEE Transactions on Circuits and Systems for Video Technology
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In this paper we present a number of advanced concepts with respect to the transformation of residual blocks in video coders, which go beyond what is incorporated in today's video coding standards. Some of these concepts will undoubtedly be adopted as part of future standards. We discuss directional transforms for extrapolation-based prediction schemes, shape-adaptive transformation for object-based coding, and large transform sizes. For the latter we provide in-depth coding efficiency results which clearly illustrate the potential benefit, especially for high definition source material, which will dominate the requirements of tomorrow's video coding standards. The compression efficiency gains that can be achieved with large block transforms range from 6 to 25%. Finally we also comment on the paradigm of coupling partition and transform areas, a principle which can be applied to block transforms as well as to shape-adaptive transforms for object-based coding.