Abstract: Embodiments of the present disclosure provide an encoding and decoding method, apparatus and device.

Abstract: Embodiments of the present application relates to the technical field of video decoding, and provide a video en/decoding method and apparatus and a storage medium, which are beneficial to improving the en/decoding efficiency. The method comprises: acquiring complexity information of a current block in an image to be processed, wherein the complexity information of the current block is obtained by calculating at least one angular gradient of the current block according to at least pixel values of the current block; determining quantization parameters of the current block according to the complexity information of the current block; en/decoding the current block on the basis of the quantization parameters.

Abstract: The present disclosure discloses image decoding and coding methods, apparatuses, devices, and storage media. In the present disclosure, an image bitstream is decoded and a feature reconstruction value corresponding to a current image feature obtained by decoding is determined; an enhanced feature value is obtained by performing feature enhancement on the feature reconstruction value; and a reconstructed image block is obtained by performing synthesis transformation on the enhanced feature value.

Abstract: The present invention provides an encoding and decoding method, apparatus and device. The method comprises: when a reference pixel of a current block is not available, removing a target prediction mode from an initial prediction mode list corresponding to the current block, so as to obtain a target prediction mode list; and encoding and decoding the current block on the basis of the target prediction mode list. The present invention can improve the encoding performance and the decoding performance.

Abstract: The present disclosure provides a picture decoding method and apparatus, a picture encoding method and apparatus, and a device. The picture decoding method comprises: when permission protection is enabled, determining one or more target region categories corresponding to a target permission level (301); and decoding a current coding unit according to the one or more target region categories (302). With the technical solutions of the present disclosure, the permission protection of various types of information (e.g., a license plate, a local region of a human body, a screen, text, etc.) in a picture can be performed, thereby improving data security.

Abstract: Methods, apparatuses, devices and storage media for decoding and encoding are provided. In one aspect, a decoding method includes: obtaining a value of an Enhanced Temporal Motion Vector Prediction (ETMVP) mode flag and an ETMVP mode index value for a current coding unit (CU); when the value of the ETMVP mode flag is a first value, determining coordinate information of an initial matching CU of the current CU according to coordinate information of the current CU; constructing an enhanced temporal candidate list based on the coordinate information of the initial matching CU; determining coordinate information of a target matching CU according to the ETMVP mode index value; and determining motion information of a subblock at a corresponding position in the current CU according to the motion information of the target matching CU.

Abstract: Decoding methods and apparatuses, coding methods and apparatuses, devices and machine-readable storage media are provided. In an example of the decoding method, for a received bitstream, by parsing a motion information index value of a skip mode or a direct mode of a current coding unit, a candidate list of the skip mode or the direct mode may be constructed, and determining a prediction mode of the current coding unit, thus, motion compensation can be performed on the current coding unit according to motion information of the current coding unit acquired from the prediction mode of the current coding unit. The motion information index value of the skip mode or the direct mode of the current coding unit is obtained by parsing according to the number of motion vector angle prediction candidate motion information and the number of inter-prediction candidate historical motion vector prediction information.

Abstract: The present disclosure provides encoding and decoding methods and apparatuses, and devices therefor. According to an embodiment of the decoding method, a to-be-processed image can be divided into X*Y slices, and the number Z of chunks within each slice can be determined. Then, for each of the Y slice lines corresponding to the to-be-processed image, chunks corresponding to X slices in the horizontal direction of the slice line in a target code stream are deinterleaved, to obtain Z chunks for each of the X slices, where the Z chunks include at least two sizes of chunks; and the X slices are decoded based on bitstream buffers corresponding to the X slices in the horizontal direction of the slice line. Where for each of the X slices, a bitstream buffer corresponding to the slice includes the chunks corresponding to the slice.

Abstract: The present application relates to the technical field of video decoding. Provided in the embodiments of the present application are a video image decoding method and coding method, an apparatus, and a storage medium, which help to improving the image quality.

Abstract: A decoding method, a device, a storage medium and an application program are provided.

Abstract: The present disclosure provides a decoding method and apparatus, a coding method and apparatus, and a device. The method comprises: on the basis of on a first code stream corresponding to a current block, acquiring a target probability distribution model corresponding to a first scaling factor; on the basis of the target probability distribution model corresponding to the first scaling factor, decoding a second code stream corresponding to the current block, to obtain a corrected residual feature corresponding to the current block; and, on the basis of the corrected residual feature, determining a reconstructed image block corresponding to the current block. The present disclosure improves the coding performance and the decoding performance.

Abstract: Embodiments of the present application relates to the technical field of video decoding, and provide a video en/decoding method and apparatus and a storage medium, which are beneficial to improving the en/decoding efficiency. The method comprises: acquiring complexity information of a current block in an image to be processed, wherein the complexity information of the current block is obtained by calculating at least one angular gradient of the current block according to at least pixel values of the current block; determining quantization parameters of the current block according to the complexity information of the current block; en/decoding the current block on the basis of the quantization parameters.

Abstract: The present disclosure discloses image decoding and coding methods, apparatuses, devices, and storage media. In the present disclosure, an image bitstream is decoded and a feature reconstruction value corresponding to a current image feature obtained by decoding is determined; an enhanced feature value is obtained by performing feature enhancement on the feature reconstruction value; and a reconstructed image block is obtained by performing synthesis transformation on the enhanced feature value.

Abstract: The present disclosure belongs to the field of image processing technologies, and in particular, to an image decoding method and apparatus, an image coding method and apparatus, a device and a storage medium. The image decoding method of the present disclosure includes: extracting image residual data or extended residual data from an image bitstream, and obtaining a plurality of extended residual groups based on the extracted image residual data or extended residual data; obtaining respective image reconstruction features corresponding to the extended residual groups by performing residual restoration on each of the plurality of extended residual groups; obtaining reconstructed feature data by performing spatial resolution amplification processing on the respective image reconstruction features corresponding to the extended residual groups; and obtaining a reconstructed image block by performing image reconstruction according to the reconstructed feature data.

Abstract: Provided in the present application are a decoding method and apparatus, a coding method and apparatus, and devices. The decoding method comprises: decoding a code stream corresponding to the current image block, so as to obtain a coefficient hyper-parameter feature corresponding to the current image block; determining a probability distribution parameter on the basis of the coefficient hyper-parameter feature; on the basis of the probability distribution parameter, decoding a code stream corresponding to the current image block, so as to obtain an initial reconstruction feature corresponding to the current image block; and on the basis of the initial reconstruction feature, determining a target reconstructed image block corresponding to the current image block. By means of the technical solution of the present application, the coding performance and the decoding performance can be improved.

Abstract: Decoding methods and encoding methods based on an adaptive intra refresh mechanism and related devices are provided. In one aspect, a decoding method includes: receiving a bit stream of a current frame; and determining whether the current frame supports an adaptive intra refresh technology. The determining comprises one of: if there is extension data in the bit stream of the current frame and the extension data carries an adaptive intra refresh video extension identifier (ID), obtaining virtual boundary position information carried in the extension data, and determining whether the current frame supports an adaptive intra refresh technology based on the virtual boundary position information; or if there is no adaptive intra refresh video extension ID in the extension data in the bit stream of the current frame, determining that the current frame does not support the adaptive intra refresh technology.

Abstract: The present disclosure relates to the technical field of image processing and discloses an image decoding and encoding method and apparatus, a device and a storage medium. In the present disclosure, feature channel distinguishing information and/or spatial point distinguishing information are obtained, and image code streams are decoded to obtain quantized residual values; an inverse quantization precision parameter value is set for each quantized residual value according to the feature channel distinguishing information and/or the spatial point distinguishing information; inverse quantization is performed on the quantization residual values according to the inverse quantization precision parameter values to obtain reconstructed residual values; synthetic transformation is performed on the reconstructed residual values to obtain a reconstructed image block.

Abstract: Decoding methods and apparatuses, coding methods and apparatuses, devices and machine-readable storage media are provided. In an example of the decoding method, for a received bitstream, by parsing a motion information index value of a skip mode or a direct mode of a current coding unit, a candidate list of the skip mode or the direct mode may be constructed, and determining a prediction mode of the current coding unit, thus, motion compensation can be performed on the current coding unit according to motion information of the current coding unit acquired from the prediction mode of the current coding unit. The motion information index value of the skip mode or the direct mode of the current coding unit is obtained by parsing according to the number of motion vector angle prediction candidate motion information and the number of inter-prediction candidate historical motion vector prediction information.

Abstract: A decoding method includes: analyzing a code stream to obtain one or more picture frames, wherein for each of the one or more picture frames, the picture frame comprises one or more coding units (CUs); determining a plurality of quantization parameter (QP) values for the picture frame, wherein a CU of the one or more CUs comprises a plurality of pixels, each of the plurality of pixels corresponds to a respective QP value in the plurality of QP values, and at least two pixels of the plurality of pixels have different QP values, and for each of the plurality of pixels, the respective QP value corresponding to the pixel is adaptively adjusted based on information of one or more reconstructed pixels surrounding the pixel; and decoding, based on the plurality of QP values, the picture frame.

Abstract: Picture decoding methods and apparatuses, and picture encoding methods and apparatuses, relating to video coding and decoding technologies are provided, which can solve a problem of low prediction efficiency in a process of picture coding and decoding (or video coding and decoding). An example picture decoding method includes: parsing a bit stream to obtain a syntax element, where the syntax element is configured to obtain a residual block of a to-be-decoded unit, and the to-be-decoded unit includes at least one prediction group; determining a prediction mode of any one prediction group in the at least one prediction group; obtaining a prediction value of the any one prediction group by performing prediction for the any one prediction group with the prediction mode; and decoding the to-be-decoded unit based on the residual block of the to-be-decoded unit and the prediction value of each one in the at least one prediction group.