Abstract: A method comprising performing object detection within a set of representations of a hierarchically-structured signal, the set of representations comprising at least a first representation of the signal at a first level of quality and a second representation of the signal at a second, higher level of quality.

Abstract: An enhancement decoder for video signals, comprising an interface to receive a first video stream using a first signal element coding format from a standard decoder, an interface to receive an enhancement data stream and a de-multiplexer to decompose the enhancement data stream into a first set of enhancement data, a second set of enhancement data and a range data. A first decoder video stream derived from the first video stream at a first resolution is enhanced by a first enhancer using the first set of enhancement data. A second decoder video stream derived from an output of the first enhancer is converted by an up-sampler to a second resolution. The second resolution being higher than the first resolution. A third decoder video stream derived from an output of the up-sampler at the second resolution is enhanced by a second enhancer using the second set of enhancement data.

Abstract: A medical telepresence system comprising: an interface to receive a plurality of data feeds from a live medical procedure, at least one data feed comprising a video signal capturing the live medical procedure; a hierarchical encoder to encode the plurality of data feeds using a first tier-based hierarchical data coding scheme, wherein encoded data from the hierarchical encoder is decodable by a first set of computing devices for viewing, the first set of computing devices being communicatively coupled to the hierarchical encoder using a first network connection; a transcoder to convert from the first tier-based hierarchical data coding scheme to a second tier-based hierarchical data coding scheme, wherein encoded data from the transcoder is receivable by a second set of computing devices for viewing, the second set of computing devices being communicatively coupled to the transcoder using a second network connection, the second network connection being of a lower quality than the first network connection; and

Abstract: There is provided a method for encoding and decoding a signal. The method comprises receiving a first signal (900) and a second signal (960), the first and second signals comprising different versions of a common content, the first signal (900) using a first signal element coding format and the second signal (960) using a second signal element coding format. The first signal (900) is encoded by a lower encoding module (1103) to generate a lower encoded signal (910). The lower encoded signal (910) is decoded to generate a lower decoded signal. The lower decoded signal is processed by at least converting from the first signal element coding format to the second signal element coding format and up-sampling, to produce a processed signal. The processed signal and the second signal (960) are processed by an upper encoding module (1107) to generate an upper encoded signal (920).

Abstract: There is provided a method for processing an input signal (700). The input signal (700) is processed at least by converting the input signal (700) from a first colour space to a second colour space, to produce a first processed signal. The processed signal is encoded by a first encoding module (703) to generate a first encoded signal (710). A decoded signal is generated by decoding the first encoded signal (710). The decoded signal is processed at least by converting the decoded signal from the second colour space to the first colour space to produce a second processed signal. The second processed signal and the input signal (700) are processed by a second encoding module (707) to generate a second encoded signal (720).

Abstract: An enhancement decoder for video signals, comprising an interface to receive a first video stream (1150) using a first signal element coding format from a standard decoder, an interface to receive an enhancement data stream and a de-multiplexer (200) to decompose the enhancement data stream into a first set of enhancement data, a second set of enhancement data and a range data. A first decoder video stream derived from the first video stream at a first resolution is enhanced by a first enhancer using the first set of enhancement data. A second decoder video stream derived from an output of the first enhancer is converted by an up-sampler to a second resolution. The second resolution being higher than the first resolution. A third decoder video stream derived from an output of the up-sampler at the second resolution is enhanced by a second enhancer using the second set of enhancement data.

Abstract: Examples described herein relate to decoding and encoding signals. Certain examples described herein encapsulate custom data that is not signal data within a stream of encoded signal data. The custom data may comprise a wide variety of metadata that annotates the signal data, or provides additional information relating to the signal data. Certain examples described herein encapsulate custom data within a set of transformed coefficient values that represent data derived from a transform operation that forms part of the signal encoding. The encapsulation is may be performed by applying a bit shift operation to coefficient bits representing the set of transformed coefficient values.

Abstract: Examples of a low complexity enhancement video coding are described. Encoding and decoding methods are described, as well as corresponding encoders and decoders. The enhancement coding may operate on top of a base layer, which may provide base encoding and decoding. Spatial scaling may be applied across different layers. Only the base layer encodes full video, which may be at a lower resolution. The enhancement coding instead operates on computed sets of residuals. The sets of residuals are computed for a plurality of layers, which may represent different levels of scaling in one or more dimensions. A number of encoding and decoding components or tools are described, which may involve the application of transformations, quantization, entropy encoding and temporal buffering. At an example decoder, an encoded base stream and one or more encoded enhancement streams may be independently decoded and combined to reconstruct an original video.

Abstract: There is provided a method for encoding and decoding a signal. The input signal (1000) is processed by at least converting the input signal (1000) from a high-dynamic range—HDR-signal to a standard dynamic range—SDR-signal, to produce a first processed signal. The first processed signal is encoded by a first encoding module (1004) to generate a first encoded signal (1012). The first encoded signal (1012) is decoded to generate a first decoded signal. The first decoded signal is processed together with the first processed signal by a second encoding module (1006) to generate a second encoded signal (1014). The second encoded signal (1014) is decoded and the result is combined with the first decoded signal (1012) to generate a second decoded signal. The second decoded signal is processed at least by converting the second decoded signal from a SDR signal to a HDR signal, to produce a second processed signal.

Abstract: Certain examples described herein relate to methods for encoding and decoding signals. Certain examples relate to the control of signal processing operations that are performed at a decoder. These may comprise optional signal processing operations to provide an enhanced output signal. For video signals, the enhanced output signal may comprise a so-called “super-resolution” signal, e.g. a signal with improved detail resolution as compared to a reference signal. Certain examples described herein provide signalling for enhancement operations, e.g. so-called super-resolution modes, within user data of one or more tier-based hierarchical encoding and decoding schemes. The user data may be embedded within values of an enhancement stream, e.g. replace one or more values for a predefined set of transformed coefficients, and/or within supplementary enhancement information messages. The user data may have a defined syntax including header and payload portions. The syntax may differ for different frames of data, e.g.

Abstract: There is provided a method for processing an input signal (700). The input signal (700) is processed at least by converting the input signal (700) from a first colour space to a second colour space, to produce a first processed signal. The processed signal is encoded by a first encoding module (703) to generate a first encoded signal (710). A decoded signal is generated by decoding the first encoded signal (710). The decoded signal is processed at least by converting the decoded signal from the second colour space to the first colour space to produce a second processed signal. The second processed signal and the input signal (700) are processed by a second encoding module (707) to generate a second encoded signal (720).

Abstract: Examples described herein relate to decoding and encoding signals. A method of performing signal decoding operations on one or more portions of a signal is presented. The performing is based at least in part on information embedded in one or more values received in one or more encoded data layers transmitted within a stream of encoded data, wherein said values are associated with transformed coefficients intended to be processed by a decoder for deriving elements of the signal, and wherein said information comprises an indication of watermarking information associated with the signal.

Abstract: A method of encoding an input signal is provided, the method comprising: quantizing a set of data based on temporal information associated with said set of data.

Abstract: Examples described herein relate to decoding and encoding signals. A method of performing signal enhancement operations on one or more portions of a signal is described, wherein the performing is based at least in part on information embedded in one or more values received in one or more encoded data layers transmitted within a stream of encoded data, and wherein said values are associated with transformed coefficients intended to be processed by a decoder for deriving elements of the signal, wherein the information indicates an impairment associated with a portion of the signal.

Abstract: A method of decoding an encoded stream into a reconstructed output signal is provided, the method comprising: receiving a first output signal decoded from a first base encoded stream according to a first codec; receiving a level encoded stream; decoding the level encoded stream to obtain a set of residuals; and, combining the set of residuals with the first output signal to generate a reconstructed signal, wherein the decoding the level encoded stream comprises: decoding a set of quantized coefficients from the level encoded stream; dequantizing the set of quantized coefficients.

Abstract: A method of decoding an encoded signal is provided, said encoded signal received within a bitstream, the method comprising: receiving a set of quantized data associated with the encoded signal; determining at least one dequantization parameter; and dequantizing the quantized data based at least in part of the at least one dequantization parameter.

Abstract: According to aspects of the invention there is provided a method of modifying sets of residuals data where residual data can be used to correct or enhance data of a base stream, for example a frame of a video encoded using a different video coding technology. There may be provided a method of encoding an input signal, the method comprising: receiving an input signal; generating one or more sets of residuals based on a difference between the input signal and one or more reconstructed signals at one or more respective resolutions; modifying the one or more sets of residuals based on a selected residual mode; and encoding the one or more sets of modified residuals to generate one or more respective encoded streams, wherein the encoding includes transforming the one or more sets of modified residuals, and wherein the modifying includes selecting a subset of residuals not to encode based on the selected residual mode. An encoder may also be provided.

Abstract: A method comprising performing object detection within a set of representations of a hierarchically-structured signal, the set of representations comprising at least a first representation of the signal at a first level of quality and a second representation of the signal at a second, higher level of quality.

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: There is provided a method for encoding and decoding a signal. The method comprises receiving a first signal (900) and a second signal (960), the first and second signals comprising different versions of a common content, the first signal (900) using a first signal element coding format and the second signal (960) using a second signal element coding format. The first signal (900) is encoded by a lower encoding module (1103) to generate a lower encoded signal (910). The lower encoded signal (910) is decoded to generate a lower decoded signal. The lower decoded signal is processed by at least converting from the first signal element coding format to the second signal element coding format and up-sampling, to produce a processed signal. The processed signal and the second signal (960) are processed by an upper encoding module (1107) to generate an upper encoded signal (920).