Methods and systems are provided for image processing. A plurality of correlation parameters representing degrees of correlation between two or more images of a plurality of images may be determined. An optimized correlation dependency graph may be generated according to the plurality of correlation parameters. The plurality of images may then be delta encoded according to the optimized correlation dependency graph. For example, the optimized correlation dependency graph may be used for performing a predetermined correlation encoding operation. The plurality of correlation parameters may be determined, for example, in accordance with one or more predetermined correlation metrics associated with the predetermined correlation encoding operation.

Systems, methods, and instrumentalities are disclosed relating to intra prediction of a video signal based on mode-dependent subsampling. A block of coefficients associated with a first sub block of a video block, one or more blocks of coefficients associated with one or more remaining sub blocks of the video block, and an indication of a prediction mode for the video block may be received. One or more interpolating techniques, a predicted first sub block, and the predicted sub blocks of the one or more remaining sub blocks may be determined. A reconstructed first sub block and one or more reconstructed remaining sub blocks may be generated. A reconstructed video block may be formed based on the prediction mode, the reconstructed first sub block, and the one or more reconstructed remaining sub blocks.

Systems, methods, and instrumentalities are disclosed relating to intra prediction of a video signal based on mode-dependent subsampling. A block of coefficients associated with a first sub block of a video block, one or more blocks of coefficients associated with one or more remaining sub blocks of the video block, and an indication of a prediction mode for the video block may be received. One or more interpolating techniques, a predicted first sub block, and the predicted sub blocks of the one or more remaining sub blocks may be determined. A reconstructed first sub block and one or more reconstructed remaining sub blocks may be generated. A reconstructed video block may be formed based on the prediction mode, the reconstructed first sub block, and the one or more reconstructed remaining sub blocks.

A method for performing image decompression. The method includes identifying a pixel in an image, wherein the image comprises a plurality of tiles including color data that is displayed by a plurality of pixels, wherein each tile is associated with a base value, a delta value, and a plurality of indices. One or more tiles associated with the pixel are identified. An interpolated base is determined by interpolating decompressed bases of the one or more tiles. An interpolated delta is determined by interpolating deltas of the one or more tiles. An index is determined for the pixel. A color value is determined for the pixel based on the interpolated base, interpolated delta, and the index.

A screen coding method and system based on mass center coincidence. The screen coding method based on mass center coincidence includes: constructing a plurality of coding unit models composed of a combination of a plurality of geometric figures with coincident mass centers, where vertices of the geometric figures do not coincide; and filling in data information to each vertex of the coding unit models according to a method of data information arrangement of a plurality of data combinations to generate a coding unit so as to implement different data lengths of the same coding unit. As such, a data length of the coding unit can be controlled, so that when more data needs to be coded, the overall size of the coding unit does not need to be changed, which greatly improves coding efficiency.

A method of encoding video data comprising: generating coefficients based on digital sample values of the video data; determining a spectral efficiency for a channel; determining a value n based on the spectral efficiency of the channel; generating coefficient vectors, wherein each of the coefficient vectors includes n of the coefficients; determining an amplitude value for a coefficient vector based on a mapping pattern, wherein for each respective allowed coefficient vector in a plurality of allowed coefficient vectors: the mapping pattern maps the respective allowed coefficient vector to a respective amplitude value in a plurality of amplitude values, and the respective amplitude value is adjacent in an n-dimensional space to at least one other amplitude value in the plurality of amplitude values that is adjacent to the respective amplitude value in a monotonic number line of the amplitude values, and modulating an analog signal based on the amplitude values.

The present invention relates to coding of an image of a video sequence block wisely and, in particular, to coding of a block of samples, which may be chrominace or luminance samples, or samples of any color space, by a pulse code modulation (PCM). After PCM coding, deblocking filtering may be applied. The deblocking filter may be selected for the present PCM coded block based on its noise and/or the noise of its adjacent block. The noise of the PCM coded block is indicated by a so-called PCM quantization parameter, which is also encoded in the bitstream.

The present invention relates to coding of an image of a video sequence block wisely and, in particular, to coding of a block of samples, which may be chrominace or luminance samples, or samples of any color space, by a pulse code modulation (PCM). After PCM coding, deblocking filtering may be applied. The deblocking filter may be selected for the present PCM coded block based on its noise and/or the noise of its adjacent block. The noise of the PCM coded block is indicated by a so-called PCM quantization parameter, which is also encoded in the bitstream.

The present disclosure relates to encoding a decoding video employing texture coding. In particular, a texture region is identified within a video picture and a texture patch is determined for said region. Moreover, a set of parameters specifies luminance within the texture region (1001) by fitting the texture region samples to a two-dimensional polynomial function of the patch determined according to the set of parameters (1040); and/or motion within the texture region by fitting motion estimated between the texture region of the video picture and an adjacent picture to a two-dimensional polynomial The texture patch and the first set of parameters are then included into a bitstream which is output of the encoder and provided in this way to the decoder which reconstructs the texture based on the patch and the function applied to the patch.

A method for encoding at least one extra bit in an image compression and decompression system. The method includes accessing an input image, and compressing the input image into a compressed image using an encoder system, wherein said encoding system implements an algorithm for encoding at least one extra bit. The method further includes communicatively transferring the compressed image to a decoding system, and decompressing the compressed image into a resulting uncompressed image that is unaltered from said input image, wherein the algorithm for encoding enables the recovery of the at least one extra bit.