Abstract: First and second pluralities of residual elements useable to reconstruct first and second respective parts of a representation of a signal are obtained. A transformation operation is performed to generate at least one correlation element. The transformation operation involves at least one residual element in the first plurality and at least one residual element in the second plurality. The at least one correlation element is dependent on an extent of correlation between the at least one residual element in the first plurality and the at least one residual element in the second plurality. The transformation operation is performed prior to the at least one correlation element being encoded.

Abstract: A first value of a first data element in a first set of data elements is obtained, the first set of data elements being based on a first time sample of a signal. A second value of a second data element in a second set of data elements is obtained, the second set of data elements being based on a second, later time sample of the signal. A measure of similarity is derived between the first value and the second value. Based on the derived measure, a quantisation parameter useable in performing quantisation on data based on the first time sample of the signal is determined. Output data is generated using the quantisation parameter.

Abstract: A computer-implemented method retrofit for decoding video in a video decoding chipset is disclosed. The method comprises receiving a video signal and a picture improvement signal; decoding the video signal to create decoded video; deriving, from the picture improvement signal, pixel touching information to be used to modify a pixel of the decoded video; and causing a graphics feeder of the video decoding chipset to overlay the pixel touching information onto the decoded video.

Abstract: A physical adapter receives a data stream comprising data usable to derive a rendition of a signal at a first level of quality and reconstruction data produced by processing a rendition of the signal at a second, higher level of quality and indicating how to reconstruct the rendition at the second level of quality using the rendition at the first level of quality. The physical adapter reconstructs the rendition at the second level of quality and outputs the reconstructed rendition and/or data derived from the reconstructed rendition. The physical adapter is connectable to signal processing equipment that outputs the data usable to derive the rendition at the first level of quality. The physical adapter increases the quality of the rendition of the signal relative to the first level of quality and enhances the functionality of the signal processing equipment.

Abstract: Signal data is processed at an encoder device. A representation of a signal at a first level of quality is obtained. The representation at the first level is upsampled using an upsampler in the encoder device to derive a preliminary representation of the signal at a second, higher level of quality. Adjustment data is derived using the representation at the first level as an input to an upsampling adjuster arranged in parallel with the upsampler in the encoder device. The adjustment data is useable by the encoder device to adjust the preliminary representation. The preliminary representation and the adjustment data are used to derive an adjusted representation of the signal at the second level. Residual data useable by a decoder device is derived, using the adjusted representation, to reconstruct a reference representation of the signal at the second level using the adjusted representation.

Abstract: Encoding a video data stream comprising a first and second frame of video data, encoding comprising the steps of: obtaining motion prediction data for a plurality of pixels, the motion prediction data indicative of the predicted relative motion of the plurality of pixels between the first and second frames of video data; obtaining a data mask comprising data indicative of relative weights to be applied for predicting pixels for the second frame; determining update data to define a relative difference between a plurality of pixels in the first frame and a corresponding plurality of pixels in the second frame, wherein said update data is based on a weighted scaling of the motion prediction data and the second frame of video data, said weighted scaling based on the data mask; and encoding the video data stream comprising at least the first frame of video data and the update data.

Abstract: There may be provided a method of decoding a received set of encoded data representing information that has been compressed, wherein the encoded data set is divided into a hierarchy of subsets, the method comprising: decoding at least one first subset to derive a respective set of attribute metadata elements; separately decoding a plurality of second subsets comprising data elements, wherein each second subset describes a region of the information that has been compressed; and, reconstructing the information that has been compressed from the data elements, wherein the region of the information that has been compressed is identified from the attribute metadata elements.

Abstract: A physical adapter receives a data stream comprising data usable to derive a rendition of a signal at a first level of quality and reconstruction data produced by processing a rendition of the signal at a second, higher level of quality and indicating how to reconstruct the rendition at the second level of quality using the rendition at the first level of quality. The physical adapter reconstructs the rendition at the second level of quality and outputs the reconstructed rendition and/or data derived from the reconstructed rendition. The physical adapter is connectable to signal processing equipment that outputs the data usable to derive the rendition at the first level of quality. The physical adapter increases the quality of the rendition of the signal relative to the first level of quality and enhances the functionality of the signal processing equipment.

Abstract: A decoder device receives data useable to generate data for representing a data signal at a first level of quality. The decoder device receives enhancement data useable to generate data for representing the data signal at a second, higher level of quality based on the data for representing the data signal at the first level of quality. The decoder device generates data for representing a target region of the data signal at a target level of quality using a selected portion of the received enhancement data. The selected portion is associated with the target region. The target level of quality is higher than the first level of quality. The decoder device generates data for representing a further region of the data signal at a level of quality that is lower than the target level of quality.

Abstract: Computer processor hardware receives a first set of adjustment values. The first set of adjustment values specify adjustments to be made to a predicted rendition of a signal generated at a first level of quality to reconstruct a rendition of the signal at the first level of quality. The computer processor hardware processes the first set of adjustment values and derives a second set of adjustment values based on the first set of adjustment values and a rendition of the signal at a second level of quality. The second level of quality is lower than the first level of quality.

Abstract: A first value of a first data element (311) in a first set of data elements (310) is obtained, the first set of data elements being based on a first time sample of a signal. A second value of a second data element (321) in a second set of data elements (320) is obtained, the second set of data elements being based on a second, later time sample of the signal. A measure of similarity is derived between the first value and the second value. Based on the derived measure, a quantisation parameter useable in performing quantisation on data based on the first time sample of the signal is determined. Output data is generated using the quantisation parameter.

Abstract: A video decoder chipset (200, 300, 400, 500) comprises a video decoder function (210), an upscaler function (230) and a combiner function (240). The video decoder function (210) is configured to (i) decode encoded video data to generate decoded video data at a first level of quality, the encoded video data having been derived by an encoder using first video data at a second, higher level of quality and (ii) output the decoded video data for storage in a memory (220). The upscaler function (230) is configured to (i) obtain the decoded video data from the memory (220) and (ii) upscale the obtained decoded video data to generate second video data at the second level of quality. The combiner function (240) is configured to (i) obtain residual data, the residual data having been derived by the encoder based on the first video data and the second video data, (ii) combine the second video data with the residual data to generate enhanced video data, and (iii) output the enhanced video data.

Abstract: A method of decoding a received set of encoded data representing information that has been compressed, wherein the encoded data set is divided into a hierarchy of subsets, is provided. The method comprises: obtaining, from at least one first subset, a respective set of offset values; and decoding a plurality of second subsets, each comprising a data structure of metadata and data, to derive a series of data values, wherein each second subset corresponds to a region of the information that has been compressed. Each offset value is associated with a second subset and indicates a relative position within the encoded data set that corresponds to the earliest element of the associated second subset with respect to the position within the encoded data set that corresponds to an element of another subset of the hierarchy of subsets.

Abstract: A method and a signal processor for receiving a data stream comprising at least two distinct sets of encoded data, at least one set of which is relative to transient/stochastic components of a signal. Based at least in part on the distinct sets of encoded data, the signal processor decodes and reconstructs a corresponding rendition of signal for each set of the encoded data. The distinct sets of renditions of signal are then combined into a single rendition of reconstructed signal.

Abstract: A method and system for encoding a plurality of signals are provided. A plurality of input signals are received. Complexity information relating to a given input signal of the plurality of input signals is obtained. A data rate target for each of the plurality of input signals is derived in dependence on an overall data rate target for the plurality of input signals. The data rate target for the given input signal depends at least in part on the complexity information relating to the given input signal. The plurality of input signals are encoded in accordance with the respective derived data rate targets to obtain a plurality of encoded signals.

Abstract: A system for encoding a sequence of frames (171) of a data signal. The system comprises: a first encoding system (120) comprising at least: a first encoder (130) configured to encode the sequence of frames (171) according to a first encoding algorithm; and a first rate control unit (135) configured to control a first bit rate at which the first encoder (130) encodes said sequence of frames (171); a second encoding system (100) comprising at least: a second encoder (116) configured to encode a second sequence of frames (175) associated with the sequence of frames (171) according to a second encoding algorithm; and a second rate control unit (135) configured to control a second bit rate at which the second encoder (130) encodes said second sequence of frames (175) associated with the sequence of frames (171).

Abstract: Computer processor hardware receives settings information for a first image. The first image includes a set of multiple display elements. The computer processor hardware receives motion compensation information for a given display element in a second image to be created based at least in part on the first image. The motion compensation information indicates a coordinate location within a particular display element in the first image to which the given display element pertains. The computer processor hardware utilizes the coordinate location as a basis from which to select a grouping of multiple display elements in the first image. The computer processor hardware then generates a setting for the given display element in the second image based on settings of the multiple display elements in the grouping.

Abstract: A method of decoding a received set of encoded data is provided. The set of encoded data represents information that comprises a plurality of data elements having values within a range of values and that has been compressed by way of entropy encoding. The method comprises: receiving data comprising the set of encoded data and a set of banded distribution data, wherein the set of banded distribution data comprises one or more pairs of values, each pair comprising a sub-range value indicating a respective sub range of the range of values and a probability value representing a probability of a data element of the plurality of data elements having a value within the respective sub-range; and reconstructing the information that has been compressed, by way of performing entropy decoding, based upon a probability distribution defined by the set of banded distribution data, upon the set of encoded data.

Abstract: A set of reconstruction elements useable to reconstruct a representation of a signal at a relatively high level of quality using data based on a representation of the signal at a relatively low level of quality is obtained. The representation at the relatively high level of quality is arranged as an array comprising at least first and second rows of signal elements. A reconstruction element is associated with a respective signal element in the set. A set of data elements is derived based on the set of reconstruction elements. At least one of the data elements is derived from at least two reconstruction elements associated with signal elements from the first row and a different number of reconstruction elements associated with signal elements from the second row.

Abstract: A first value of a first data element in a first set of data elements is obtained, the first set of data elements being based on a first time sample of a signal. A second value of a second data element in a second set of data elements is obtained, the second set of data elements being based on a second, later time sample of the signal. A measure of similarity is derived between the first value and the second value. Based on the derived measure, a quantisation parameter useable in performing quantisation on data based on the first time sample of the signal is determined. Output data is generated using the quantisation parameter.