Tencent Technology (shenzhen) Company Limited

Huawei Technologies Co., Limited

Ali Corporation

Tencent Technology Company Limited

Shan Liu

Haitao Yang

Qing Zhang

Yin Zhao

Huanbang Chen

Ying Hu

Hong Zhang

Feng Gao

Jiantong Zhou

Jiali Fu

Shan Gao

Xiang Ma

Xiaozhong Xu

Yingbin Wang

Xiang Li

Ye Hu

Lun Liang

Hongbin Zhang

Guichun Li

Yu Zheng

Jing Guo

Li Kong

Liqiang Wang

Victor Alexeevich Stepin

Haijun Liu

Yu Xu

Shitao Wang

Dexian Chen

Shi Wang

Yiming Li

Feijian Jin

Zhenzhong Chen

Can Ping Zheng

Yanmiao Lin

Byeongdoo Choi

Xiao Zhong Xu

Alexey Konstantinovich Filippov

Alexander Alexandrovich Karabutov

Igor Pasechnik

Roman Chernyak

A method for providing immersive media, performed by at least one processor includes adding resolution description information and resolution selection strategy information to file format information of immersive media content, determining a target resolution to be provided to a client based on the resolution description information and the resolution selection strategy information of the immersive media content, and transmitting an immersive media file of the target resolution to the client.

Method for providing and method for acquiring immersive media, apparatus, device, and storage medium

The present disclosure provides a video decoding method. The method includes obtaining a bitstream that needs to be decoded, the bitstream that needs to be decoded comprising a current decoding block, the current decoding block using an intra string copy mode, and the current decoding block comprising a current string; determining a string length encoding resolution of the current string; decoding the bitstream that needs to be decoded to obtain an encoded string length corresponding to the current string; and obtaining a string length of the current string according to the string length encoding resolution of the current string and the corresponding encoded string length. The string length encoding resolution of the current string is at least one of the following: at least one preset value, each preset value being an integer pixel greater than or equal to 1, or a width or a height of the current decoding block.

Video decoding method, video encoding method, electronic device, and storage medium

A video decoding method includes performing entropy decoding processing on a code block of a video image frame of a video image frame sequence, to obtain a quantization coefficient block of residual data corresponding to the code block; collecting statistics of quantization coefficients in a target region in the quantization coefficient block, to obtain a quantization coefficient statistical value; selecting a transform matrix combination corresponding to the quantization coefficient statistical value; and performing inverse transform processing on an inverse quantization result of the quantization coefficient block based on the selected transform matrix combination, to obtain reconstructed residual data, the reconstructed residual data being used for video image reconstruction.

Video decoding method and apparatus, computerreadable medium, and electronic device

This application relates to the field of video coding and decoding technologies, and provides a video decoding method and apparatus, a video coding method and apparatus, a device, and a storage medium. The method includes decoding, from a bit stream, a binary symbol string with string length information of a current string, the string length information comprising information related to a string length of the current string; inversely binarizing the binary symbol string according to a string length resolution (SLR) of the current string, to obtain the string length information; and determining the string length of the current string according to the string length information.

Video decoding method and apparatus, video coding method and apparatus, device, and storage medium

A video decoding method and apparatus, a video encoding method and apparatus, a computer device, and a storage medium, which belong to the field of video processing. The video decoding method includes: performing classification on a displacement vector of a decoded block in a historical motion information list according to a following classification method, the classification method comprising: in a case that the decoded block satisfies a classification condition of any class of a plurality of classes, adding the displacement vector of the decoded block to the class, and stopping performing classification on the displacement vector of the decoded block.

Video decoding method and apparatus, video encoding method and apparatus, and device and storage medium

A prediction method includes: performing downsampling on a luma component of a to-be-processed image block to obtain an initial signal of the luma component; obtaining a residual signal of the luma component based on the obtained initial signal of the luma component; obtaining a residual signal of a chroma component of the to-be-processed image block based on the chroma component of the to-be-processed image block without downsampling. The method further includes: respectively performing a transform on the residual signal of the luma component and the residual signal of the chroma component, to obtain transform coefficients, performing quantization on the obtained transform coefficients, to obtain quantization coefficients, and performing entropy encoding on the obtained quantization coefficients to obtain a bitstream.

Chroma prediction method and device

This application provides a method and an apparatus for constructing a motion information list in video encoding and decoding and a device, which relates to the field of video encoding and decoding technologies. The method includes: constructing a space domain motion information list, the space domain motion information list including motion information of a space domain neighboring block of a current block, and the space domain neighboring block including at least an intra string copy (ISC) block; and obtaining at least one piece of motion information from the space domain motion information list when motion information in a candidate motion information list is insufficient, and filling the candidate motion information list using the at least one piece of motion information. According to this application, by filling the candidate motion information list using the space domain adjacent motion information when the motion information included in the candidate motion information list is insufficient, content of the candidate motion information list is expanded, so that more displacement vectors that are more effective are provided in the candidate motion information list to achieve a better displacement vector prediction effect, thereby improving the video compression performance.

Method and apparatus for constructing motion information list in video encoding and decoding and device

A video decoding and encoding method and apparatus, a computer-readable medium, and an electronic device. The video decoding method includes classifying decoded blocks adjacent to a target block according to information about the decoded blocks to obtain at least one category, obtaining a category identifier corresponding to the target block based on coding information corresponding to the target block, determining a target category corresponding to the target block from the at least one category according to the category identifier corresponding to the target block, determining a predictive vector of the target block based on vectors of decoded blocks included in the target category, and decoding the target block based on the predictive vector.

Video decoding and encoding method and apparatus, computer-readable storage medium and electronic device

A video encoding method is provided. The method includes decoding intra-frame prediction mode information corresponding to a current decoding unit, decoding first identification information corresponding to the current decoding unit when the intra-frame prediction mode information indicates that a block differential pulse code modulation (BDPCM) mode is applied to the current decoding unit, determining, when the first identification information indicates that a transform block (TB) corresponding to the current decoding unit does not include any non-zero transform coefficients, that a residual block corresponding to the current decoding unit is an all-zero residual block, and reconstructing the current decoding unit according to the residual block and a prediction block corresponding to the current decoding unit. The technical solutions provided in embodiments of this application improve the encoding and decoding efficiency of the decoding unit using the BDPCM mode. Apparatus and non-transitory computer-readable storage medium counterpart embodiments are also provided.

Video encoding and decoding methods and apparatuses, device, and storage medium

This application provides a method for constructing a motion information list in video encoding and decoding performed by a computer device. The method includes: obtaining a motion information list, which is a candidate motion information list is used for providing a candidate prediction displacement vector; determining at least one piece of motion information when a length of the motion information list meets a condition; and adding the at least one piece of motion information to the candidate motion information list to obtain an updated motion information list when a length of the candidate motion information list is less than a threshold. According to the embodiments of this application, by filling a motion information list using extra motion information when motion information included in the motion information list is insufficient, more effective displacement vectors are provided in the motion information list to achieve a better displacement vector prediction effect.

An encoding method includes capturing an original screen video to be encoded, the original screen video including frames of screen images, reading image feature parameters of the frames of screen images in the original screen video, determining video encoding parameters for the original screen video according to the image feature parameters, acquiring a screen display resolution of a screen sharing object, and encoding the original screen video according to the video encoding parameters and with reference to the screen display resolution of the screen sharing object.

Encoding method and apparatus for screen sharing, storage medium, and electronic device

Embodiments of this application disclose a decoding method includes: obtaining a bitstream including picture data; parsing the bitstream to obtain node split mode information of a first-level coding tree and node split mode information of a second-level coding tree, if the split mode corresponding to the first node is no further splitting, parsing the bitstream to obtain encoding information of the first node; and decoding and reconstructing, based on the encoding information of the first node, a coding unit corresponding to the first node, to obtain a picture corresponding to the picture data.

Picture data encoding method and apparatus and picture data decoding method and apparatus

Video coding/decoding can improve the uniformity of pixel strings and provide for increased coding and decoding efficiency. String length information of a current string from a bit stream is decoded. Based on the string length information and a determined string length resolution (SLR) of the current string a string length of the current string is determined. By using the SLR as a basis for dividing and decoding the pixel string, the length of the pixel string in a coding block can be limited to a multiple of the SLR, which improves uniformity of pixel strings, so that a decoder end can perform decoding with memory alignment, thereby improving decoding efficiency of the pixel strings.

A method and an apparatus for detecting a region of interest (ROI), an electronic device, and a readable storage medium are provided. In the method for detecting a ROI, a target video frame image is divided into a plurality of image blocks and chrominance components of pixels of each image block are acquired. A ROI of the target video frame image is detected by determining a region type of each image block according to a ratio of pixels in an image block meeting a preset chrominance condition to pixels of the image block.

Method and apparatus for detecting region of interest, electronic device, and readable storage medium

This application provides a method for constructing a motion information list in video encoding and decoding, an apparatus, and a device, relating to the field of video encoding and decoding technologies. The method includes: obtaining candidate motion information and a length of the motion information list; based on the length of the motion information list, determining target motion information to check for duplicates in the motion information list; checking the motion information list to for duplicates by comparing the target motion information with the motion information list; and updating the motion information list based on whether the motion information list has a duplicate of the target motion information.

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Shenzhen, China

Shan Liu