8 results about "Bitstream format" patented technology

Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes determining a set of parameters for illumination compensation associated with a first motion compensated reference block of a block in a picture of a video based on a function of a set of samples of the first motion compensated reference block and a set of samples of a second motion compensated reference block of the block, processing a prediction of the block based on the set of parameters, the prediction being associated with the first motion compensated reference block and encoding the block based on the processed prediction. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

A method and system for encoding and decoding avatar animation data are disclosed. Source avatar parameters, including skeletal, morph, blendshape or keypoint parameters, are mapped to corresponding target avatar parameters according to correspondence information. The mapped parameters and source parameters are encoded in a data stream comprising avatar animation units (AAUs), each with a header and payload. Configuration AAUs signal profile, timescale and correspondence indices. Control, morph, joint and keypoint AAUs carry animation data. The data stream enables efficient cross-platform transmission of avatar animation, and decoding generates and renders target avatar meshes with synchronized animation.

Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes accessing a reconstructed block corresponding to a block in a picture of a video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. The method of video decoding includes accessing a reconstructed block corresponding to a block in a picture of an encoded video, determining at least one filter pattern based on a property of the block and filtering the reconstructed block according to the at least one filter pattern. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.

A neural processing unit (NPU) for decoding video or feature map is provided. The NPU may comprise at least one processing element (PE) to perform an inference using an artificial neural network. The at least one PE may be configured to receive and decode data included in a bitstream. The data included in the bitstream may comprise data of a base layer. Alternatively, the data included in the bitstream may comprise data of the base layer and data of at least one enhancement layer. The data of the base layer included in the bitstream may include a first feature map. The data of the at least one enhancement layer included in the bitstream may include a second feature map.

The invention relates to the field of data processing, in particular to a data encryption transmission method and system based on a Polar code. The method comprises the following steps: converting to-be-processed data in wireless equipment into a bit stream format to obtain first data; performing time sequence analysis on the first data to obtain a potential change rule contained in the first data; preprocessing the first data based on a potential change rule; coding the preprocessed first data by adopting a Polar code to obtain second data; performing disturbance encryption on coding parameters in the second data in combination with the key information to obtain third data; and sending the encrypted third data to a receiving end through the wireless transmission module. According to the method, disturbance encryption is carried out on the coding parameters of the Polar code in combination with the key information, so that the encrypted data stream has higher confidentiality, the difficulty of eavesdropping and tampering the data is improved, and the security of the data in the wireless equipment is effectively protected.

Provided in the embodiments of the present application are a texture super-compression encoding method and a texture super-compression decoding method. The texture super-compression encoding method comprises: acquiring an image; performing block division processing on the image to obtain multiple blocks; determining, from among multiple preset encoding modes, a target encoding mode corresponding to a first block; encoding the first block on the basis of the target encoding mode corresponding to the first block, so as to obtain a texture bitstream of the first block; extracting, from a texture bitstream of the image, encoded data of weights corresponding to the multiple blocks and encoded data of endpoints corresponding to the multiple blocks; and encoding the encoded data of the weights corresponding to the multiple blocks, and encoding the encoded data of the endpoints corresponding to the multiple blocks, so as to obtain a texture super-compression bitstream of the image. Thus, further compression can be performed in respect of a texture bitstream format in which the lengths and positions of weights and endpoints in a texture bitstream of each block are not fixed, thereby balancing reconstructed image quality and compression ratio.

The present application relates to sample groups of operation points in encoded and decoded video, and describes systems, methods, and apparatus for processing visual media data. The method includes performing conversion between visual media data and a visual media file, wherein the visual media file stores a bitstream of the visual media data in a plurality of tracks according to a format rule, wherein the format rule specifies that file-level information includes syntax elements, and the syntax elements identify one or more tracks from the plurality of tracks that contain sample groups of a particular type including operation point information.

Methods and apparatuses for video coding and decoding are provided. The method of video encoding includes determining a set of parameters for illumination compensation associated with a first motion compensated reference block of a block in a picture of a video based on a function of a set of samples of the first motion compensated reference block and a set of samples of a second motion compensated reference block of the block, processing a prediction of the block based on the set of parameters, the prediction being associated with the first motion compensated reference block and encoding the block based on the processed prediction. A bitstream formatted to include encoded data, a computer-readable storage medium and a computer program product are also described.