Abstract: The present disclosure relates to encoding of video image using coding parameters, which are adapted based on events related to motion within the video image. Image content is captured by a standard image sensor and an event-triggered sensor, providing an event-signal indicating changes (e.g. amount and time-spatial location) of image intensity. Objects are detected within the video image, based on the event signal assessing motion of the object, and their textures extracted. The spatial-time coding parameters of the video image are determined based on the location and strength of the event signal, and the extent to which the detected objects moves.

Abstract: An intra-frame decoding method includes obtaining, from a video code stream, prediction mode information of a first signal component of a current block, determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode, obtaining a predicted value of a first signal component sampling point of the current block, and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

Abstract: This application provides a video processing method and apparatus. The method includes: adding, by a server, perception attribute information of an object and spatial location information of the object to a video bitstream or a video file, and encapsulating the video bitstream or the video file, where the perception attribute information is used to indicate a property presented when the object is perceived by a user; and obtaining, by a terminal device, the video bitstream or the video file that carries the perception attribute information of the object and the spatial location information of the object, and performing perception rendering on a perception attribute of the object based on behavior of the user, the perception attribute information of the object and the spatial location information of the object.

Abstract: A chroma component prediction method, comprising obtaining reference samples of a current block, wherein the reference samples comprise a luma reference sample array and a chroma reference sample array, obtaining a correlation parameter based on the luma reference sample array and the chroma reference sample array, and calculating a prediction value of a chroma component of the current block based on a luma component of the current block and the correlation parameter, wherein the reference samples comprise samples on top of the current block and on a top right of the current block, or the reference samples comprise samples on a left of the current block and on a bottom left of the current block.

Abstract: A method includes obtaining a first motion vector of a motion compensation unit included in an affine code block. The method also includes determining a second motion vector based on the first motion vector, where a precision of the second motion vector matches a motion vector precision of a storage unit corresponding to the motion compensation unit. The method further includes determining a third motion vector based on the second motion vector, where there is a preset correspondence between the third motion vector and the second motion vector, and the third motion vector is used for subsequent encoding/decoding processing.

Abstract: An image prediction method and apparatus includes obtaining predicted motion information of an image block; determining an initial predicted block of the image block according to the predicted motion information and a reference image of the image block; performing, according to the predicted motion information, L iterative searches in the reference image using an integer pixel step size to obtain an intermediate predicted block of the image block; performing a single search in the reference image using a fractional pixel step size to obtain M predicted blocks of the image block; determining a target predicted block of the image block according to the M predicted blocks and the intermediate predicted block; and obtaining a predicted value of a pixel value of the image block according to a pixel value of the target predicted block.

Abstract: A video coding device selects a current block for sub-block based affine inter-prediction, and derives a sub-block size for a sub-block of the current block. The sub-block size includes a sub-block width and a sub-block height. The device determines a unidirectional width threshold (TwU), a bidirectional width threshold (TwB), a unidirectional height threshold (ThU), and a bidirectional height threshold (ThB), where a total value of TwB and ThB exceeds a total value of TwU and ThU. The device determines that the affine inter-prediction is unidirectional inter-prediction or bidirectional inter-prediction. Based on the determination, the device applies the TwU or the TwB to the sub-block width, and applies the ThU or the ThB to the sub-block height. The device then derives a motion vector for the sub-block based on motion vectors for the current block, the sub-block width, and the sub-block height.

Abstract: A mechanism of video coding is provided. The mechanism includes generating a reconstructed video frame. Noise suppression filter parameters are determined by partitioning the reconstructed video frame into blocks and matching the blocks to create patches. The noise suppression filter parameters are then determined based on the patches by creating a transformed matrix of patch frequencies. The noise suppression filter parameters include a noise estimation parameter that is a function of patch frequency. The noise suppression filter parameters are then employed to apply a noise suppression filter to the reconstructed video frame.

Abstract: A chroma component prediction method, comprising obtaining reference samples of a current block, wherein the reference samples comprise a luma reference sample array and a chroma reference sample array, obtaining a correlation parameter based on the luma reference sample array and the chroma reference sample array, and calculating a prediction value of a chroma component of the current block based on a luma component of the current block and the correlation parameter, wherein the reference samples comprise samples on top of the current block and on a top right of the current block, or the reference samples comprise samples on a left of the current block and on a bottom left of the current block.

Abstract: An intra-frame decoding method is provided. The method includes: obtaining, from a video code stream, prediction mode information of a first signal component of a current block, determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode, obtaining a predicted value of a first signal component sampling point of the current block, and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

Abstract: Embodiments of the present invention disclose a method and an apparatus for acquiring a video bitstream, and relate to the field of information technologies, which can improve network bandwidth utilization. The method includes: firstly, acquiring, by a terminal, a minimum bit rate corresponding to a parameter of the terminal; then, sending, by the terminal, a video bitstream acquiring request to a server, and when receiving the video bitstream acquiring request sent by the terminal, sending, by the server, an MPD to the terminal; and finally, receiving, by the terminal, the MPD sent by the server, and acquiring a video bitstream according to the MPD and the minimum bit rate. The embodiments of the present invention are applicable to a case in which a user downloads video data by using a terminal.

Abstract: An intra-frame decoding method is provided. The method includes: obtaining, from a video code stream, prediction mode information of a first signal component of a current block, determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode, obtaining a predicted value of a first signal component sampling point of the current block, and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

Abstract: An intra-frame decoding method includes obtaining, from a video code stream, prediction mode information of a first signal component of a current block; determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode; obtaining a predicted value of a first signal component sampling point of the current block; and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.

Abstract: A mechanism of video coding is provided. The mechanism includes generating a reconstructed video frame. Noise suppression filter parameters are determined by partitioning the reconstructed video frame into blocks and matching the blocks to create patches. The noise suppression filter parameters are then determined based on the patches by creating a transformed matrix of patch frequencies. The noise suppression filter parameters include a noise estimation parameter that is a function of patch frequency. The noise suppression filter parameters are then employed to apply a noise suppression filter to the reconstructed video frame.

Abstract: A video coding device selects a current block for sub-block based affine inter-prediction, and derives a sub-block size for a sub-block of the current block. The sub-block size includes a sub-block width and a sub-block height. The device determines a unidirectional width threshold (TwU), a bidirectional width threshold (TwB), a unidirectional height threshold (ThU), and a bidirectional height threshold (ThB), where a total value of TwB and ThB exceeds a total value of TwU and ThU. The device determines that the affine inter-prediction is unidirectional inter-prediction or bidirectional inter-prediction. Based on the determination, the device applies the TwU or the TwB to the sub-block width, and applies the ThU or the ThB to the sub-block height. The device then derives a motion vector for the sub-block based on motion vectors for the current block, the sub-block width, and the sub-block height.

Abstract: A method of coding implemented by a decoding device. The method includes receiving a bitstream containing a picture from an encoding device, dividing the picture into coding tree units (CTUs), partitioning one of the CTUs into first sub-blocks using quad-tree (QT) partitioning, and partitioning the first sub-blocks into second sub-blocks using a first type of partitioning (e.g., BT or TT). Thereafter, partitioning of the second sub-blocks is restricted to only the first type of partitioning. An image generated using the one of the CTUs as partitioned is displayed on a display of an electronic device.

Abstract: A method and device for generating a predicted value of image to generate a predicted value of a current block during image encoding or decoding is disclosed, where the method includes determining a searching scope, wherein a plurality of motion vectors are included in the searching scope, performing up-sampling interpolations on first reference blocks corresponding to the motion vector in the searching scope, in a reference image of the current block using a first filter to obtain up-sampled first reference blocks, obtaining, using the up-sampled first reference blocks, at least one candidate motion vector corresponding to the current block, performing up-sampling interpolations on second reference blocks, corresponding to the at least one candidate motion vector, in the reference image of the current block using a second filter to obtain up-sampled second reference blocks, combining the up-sampled second reference blocks to obtain a predicted value of the current block.

Abstract: An embodiment of the present invention provides an image coding method, where the coding method includes: performing predictive coding on an image; performing transform coding on the image on which the predictive coding has been performed; performing, by using a quantization matrix, quantization coding on the image on which the transform coding has been performed, where the quantization matrix is a matrix reflecting image quantization step information, the quantization matrix includes an M*N quantization matrix and an N*M quantization matrix, and the N*M quantization matrix is obtained by transposing the M*N quantization matrix; and performing entropy coding on the image on which the quantization coding has been performed, and coding the M*N quantization matrix, so as to generate a code stream. In the present invention, the number of bits required for coding a quantization matrix is effectively saved, thereby improving compression efficiency.

Abstract: An encoder for obtaining training signals and to train a codebook for vector quantization of a video sequence of subsequent frames is provided, each frame being subdivided into coding blocks. The encoder comprises a scalar quantization unit configured to obtain, for each coding block of one or more training frames of the video sequence, a scalar quantized signal from a prediction error, an entropy coding unit configured to entropy code, for each coding block of each training frame, the scalar quantized signal into an output signal, a data selection unit configured to select, from among the training frames, one or several coding blocks depending on a cost function of their respective output signal, and to obtain, for each selected coding block, a training signal derived from the prediction error of the selected coding block and configured to train the codebook for vector quantization of the video sequence.

Abstract: An intra-frame decoding method includes obtaining, from a video code stream, prediction mode information of a first signal component of a current block; determining a prediction mode of the first signal component of the current block from a prediction mode set of the first signal component of the current block according to the prediction mode information of the first signal component of the current block, where the prediction mode set of the first signal component of the current block includes at least one of a linear model above (LMA) mode and a linear model left (LML) mode; obtaining a predicted value of a first signal component sampling point of the current block; and obtaining a reconstructed value of the first signal component sampling point of the current block according to the predicted value of the first signal component sampling point of the current block.