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...paper, we present 2-d direction-adaptive transforms for coding prediction residuals of video. these direction-adaptive residual transforms (dart) are shown to be...how they are used to code both inter and intra prediction residuals. for intra coding, we also demonstrate the relation between the prediction mode and the optimal dart...
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...approach to combined spatial (intra) prediction and adaptive transform coding in block-based video and image compression. context-adaptive spatial prediction from available, previously decoded boundaries of the block, is followed by optimal transform coding of the prediction residual. the derivation of both the prediction and the adaptive transform for the prediction error, assumes a separable first...
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...we investigate the application of direction adaptive-partitioned block transform (da-pbt) to color images and propose a basic framework for da-pbt color image coding. first, we investigate how da...also made with the other coding methods. then, rate allocation schemes...
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...we propose a direction-adaptive dwt (da-dwt) that locally adapts the filtering directions to image content based on directional lifting. with the adaptive transform, energy com- paction is improved for sharp image features. a mathematical...
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...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...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...
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...frequency domain coder is designed for medium-band (4.8-9.6 kbps) speech coding. in this coding scheme, the linear prediction residue is transformed and vector quantized. in order...errors in the frequency domain, adaptively weighted matching is employed instead of the conventional adaptive bit allocation. therefore, the residual signal can be reconstructed by...
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...this paper, we propose an adaptive transform scheme to
further exploit the non-local correlation for the motion-compensated residual. for a video sequence, there are...content-similar blocks
of the coding block, which most probably reflect the characteristic of the coding block, to train the adaptive transform.
the predicted block together with the boundary...
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...a predictive transform coder using singular value decomposition (svd) and adaptive vector quantization (avq) is presented. the linear predictive coding (lpc) excitation is obtained by a weighting vq quantization of the svd transforms of the prediction residual. the orthogonal representation of the excitation provided by the svd transform permits a fine quantization of...
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transforms used in image coding are also commonly used to compress prediction residuals in video coding. prediction residuals have different spatial characteristics from...of images and motion compensated prediction residuals by analyzing their local anisotropic characteristics and develop transforms adapted to the local anisotropic characteristics of these residuals. the analysis indicates that many...