Abstract: There are provided methods and apparatus for illumination compensation of intra-predicted video. An apparatus includes an encoder for encoding a picture using non-local intra prediction. The encoder includes an illumination compensation processing unit for applying illumination compensation to predicted data obtained from the non-local intra prediction.

Abstract: Methods and apparatus are provided for de-artifact filtering using multi-lattice sparsity-based filtering. The apparatus includes a sparsity-based filter (600) for de-artifact filtering picture data for a picture. The picture data includes different sub-lattice samplings of the picture. Sparsity-based filtering thresholds for the filter are varied temporally.

Abstract: There are provided methods and apparatus for video encoding and decoding geometrically partitioned super blocks. An apparatus includes an encoder for encoding image data for at least a portion of a picture. The image data is formed by a geometric partitioning that applies geometric partitions to picture block partitions. The picture block partitions are obtained from at least one of top-down partitioning and bottom-up tree joining.

Abstract: There are provided methods and apparatus for video encoding and decoding geometrically partitioned bi-predictive mode partitions. An apparatus includes an encoder for encoding bi-predictable picture data for at least a portion of a picture using adaptive geometric partitioning. Geometric partitions for the adaptive geometric partitioning are predicted using at least one predictor selected from a first set of predictors corresponding to a first list of references pictures, a second set of predictors corresponding to a second list of references pictures, and a third set of predictors used for bi-prediction and including predictors from at least one of the first and second sets.

Abstract: Implementations may relate to various aspects of modifying, or using, a coded bitstream, or to recovering watermarking information from data. In one implementation, a coded bitstream is modified to allow for the application of a watermark to the coded bitstream without changing the coding of any other syntax elements in the bitstream. This is performed by identifying conditions necessary to change a coded syntax element without disrupting the interpretation of subsequent coded elements. The coded syntax element is replaced with another coded value if the modified value generates the same decoding variables as the original value would have generated. Particular implementations focus on syntax elements coded using entropy coding, including, for example, Context-based Adaptive Binary Arithmetic Coding (CABAC). Regardless of the type of coding or watermarking, various implementations may provide for recovering watermarking information.

Abstract: There are provided methods and apparatus for context dependent merging for SKIP/DIRECT modes for video encoding and decoding. An apparatus includes an encoder for joint coding partitions of an image region using frame partitioning and a partition merging procedure, wherein any given one of the partitions that use a coding mode with implicit coding rules is subject to being merged, with another one of the partitions, using a distinct merging rule different than that used for a coding mode with explicit coding rules.

Abstract: There are provided methods and apparatus for in-loop de-artifact filtering based on multi-lattice sparsity-based filtering. An apparatus includes an encoder for encoding picture data for a picture. The encoder includes an in-loop de-artifacting filter for de-artifacting the picture data to output an adaptive weighted combination of at least two filtered versions of the picture. The picture data includes at least one sub-sampling of the picture.

Abstract: There are provided methods and apparatus supporting a multi-pass video structure for slice data. An apparatus includes an encoder for encoding at least one syntax data element related to at least two partitions of at least a portion of a picture. The at least one syntax element is encoded within a multi-pass syntax structure. The at least one syntax element belongs to a given class of data. The encoder encodes the at least one syntax data element with respect to all partitions of at least the portion of the picture prior to encoding a next class of data, wherein later coded data classes, including the next class, have at least one of an explicit coding and an implicit coding of at least one of a casual dependency and a non-casual dependency with respect to earlier coded data classes coded earlier than the next class.

Abstract: There are provided methods and apparatus for fast geometric mode decision in a video encoder. An apparatus includes an encoder (100) for performing a non-exhaustive geometric mode decision using geometric model-based partitioning modes. The encoder (100) skips a testing of the geometric model-based partitioning modes based on at least one of a correlation and a dependence between the geometric model-based partitioning modes and non-geometric partitioning modes.

Abstract: There are provided a method and apparatus for multi-lattice sparsity-based filtering. The apparatus includes a filter for filtering picture data for a picture to generate an adapted weighted combination of at least two filtered versions of the picture. The picture data includes at least one sub-sampling of the picture.

Abstract: A device incorporates an H.264 compatible video encoder for providing compressed, or encoded, video data. The H.264 encoder comprises a buffer for storing previously coded macroblocks of a current picture being encoded; and a processor for generating adaptive reference picture data from the previously coded macroblocks of the current picture; wherein the adaptive reference picture data is for use in predicting uncoded macroblocks of the current picture.

Abstract: Implementations may relate to various aspects of modifying, or using, a coded bitstream, or to recovering water-marking information from data. In one implementation, a coded bitstream is modified to allow for the application of a watermark to the coded bitstream without changing the coding of any other syntax elements in the bitstream. This is performed by identifying conditions necessary to change a coded syntax element without disrupting the interpretation of subsequent coded elements. The coded syntax element is replaced with another coded value if the modified value generates the same decoding variables as the original value would have generated. Particular implementations focus on syntax elements coded using entropy coding, including, for example, Context-based Adaptive Binary Arithmetic Coding (CABAC). Regardless of the type of coding or watermarking, various implementations may provide for recovering watermarking information.

Abstract: There are provided methods and apparatus for in-loop artifact filtering. An apparatus includes an encoder for encoding an image region. The encoder has at least two filters for successively performing in-loop filtering to respectively reduce at least a first and a second type of quantization artifact.

Abstract: There are provided methods and apparatus for video coding using prediction data refinement. An apparatus includes an encoder for encoding an image region of a picture. The encoder has a prediction refinement filter for refining at least one of an intra prediction and an inter prediction for the image region. The prediction refinement filter refines the inter prediction for the image region using at least one of previously decoded data and previously encoded data, the previously decoded data and the previously encoded data corresponding to pixel values in neighboring regions with respect to the image region.

Abstract: A multi-frequency microwave antenna (1) of the microwave image reconstruction system senses a signal which passes through an analogue connection (6) to a Dicke null-balancing radiometer (7) which detects sequentially the signal contributions at the different frequencies of the multi-frequency antenna of the system. The resulting sequential analogue signals from the radiometer are directly related to the brightness temperatures at the corresponding frequencies, and these brightness temperatures are directly related to a real intra-body temperature distribution. The system uses a PC (5) and comprises a mean to reconstruct a one-dimensional profile of real intra-body temperatures from the brightness temperatures via the outputs from the analogue-to-digital converter (15).

Abstract: There are provided methods and apparatus for adaptive geometric partitioning for video encoding and decoding. An apparatus includes an encoder for encoding image data corresponding to pictures by adaptively partitioning at least portions of the pictures responsive to at least one parametric model. The at least one parametric model involves at least one of implicit and explicit formulation of at least one curve.

Abstract: There are provided methods and apparatus for reduced resolution partitioning. An apparatus includes an encoder for encoding video data using adaptive tree-based frame partitioning, wherein partitions are obtained from a combination of top-down tree partitioning and bottom-up tree joining.

Abstract: The invention relates to a video coding method of exploiting the temporal redundancy between successive frames in a video sequence. A reference frame, called 1-frame, is first approximated by a collection of geometric features, called atoms. The following predicted frames called, P-frames, are approximated by the geometric transformations of the geometric features (atoms) describing the previous frame. Preferably, the I-frame is approximated by a linear combination of N atoms (formula), selected in a redundant, structured library. They are indexed by a string of parameters representing the geometric transformations applied to the generating mother function g(x,y) and the cn are weighting coefficients.