Tencent Technology (shenzhen) Company Limited

Tsinghua University

Tencent Technology Company Limited

Chenchen Gu

Xunan Mao

Xinwei Gao

Jing Lv

Yongfang Shi

Anlin Gao

Weiran Li

Haibo Deng

Yaoyao Guo

Licai Guo

Jian He

Jingchang Chen

Tao Zhang

Wen Gao

Qian Chen

Hong Zhang

Ronggang Wang

Chao Dai

Xun Zhang

Jiangtao Wen

Pu Wang

Pin Tao

Fuzhong Sheng

Haixu Han

Xuecheng Luo

Peizhao Li

Wenting Wu

Mou Xiao

Bocheng Xin

Zhaoliang He

Quanzhan Zheng

Baicheng Xin

Jing Lyu

Jie Wan

A video encoding method and a video decoding method are provided. In the video decoding method, a first resolution of a to-be-decoded block in a to-be-decoded video frame is obtained and a second resolution of a reference block referenced by the to-be-decoded block in a decoded video frame is obtained. Resolutions of the to-be-decoded block and the reference block are adjusted to a target resolution when the first resolution is different from the second resolution. A motion vector (MV) of the to-be-decoded block relative to the reference block is determined according to the to-be-decoded block with the target resolution and the reference block with the target resolution.

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

A video decoding method includes obtaining a current video frame and determining a region of interest (ROI) of the current video frame. The method also includes decoding the ROI by using a first resolution, and decoding at least other regions of the current video frame than the ROI by using second resolutions, the first resolution being higher than the second resolution.

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

Embodiments of this disclosure provide a data processing method and apparatus. The method includes: acquiring M candidate quantized state chains of a transform block in multimedia data; acquiring N syntax elements corresponding to a transform coefficient i in the transform block, and acquiring fixed probability models respectively corresponding to K syntax elements; performing context modeling for (N-K) syntax elements according to adjacent coding coefficients of the transform coefficient i, to obtain target probability models respectively corresponding to the (N-K) syntax elements; determining a coefficient rate distortion cost of the transform coefficient i according to the fixed probability models, the target probability models, and a quantization reconstruction value of the transform coefficient i; and determining path rate distortion costs respectively corresponding to the M candidate quantized state chains according to a coefficient rate distortion cost of each transform coefficient.

Data processing method and apparatus

A video decoding method, a video encoding method, and related apparatuses. The method includes: obtaining a current video frame to be decoded, the current video frame being divided into a plurality of regions; determining a corresponding resolution for each region in the plurality of regions, to obtain a plurality of resolutions, the plurality of resolutions including at least two different resolutions; and decoding a video block in each region in the plurality of regions by using a corresponding resolution, the current video frame being divided into a plurality of video blocks. In this application, the technical problem of relatively large fluctuations in a PSNR caused by encoding and decoding of a video by using the same resolution in the related art is resolved.

Video encoding method, video decoding method, and related apparatuses

A video coding method includes obtaining a current frame from a plurality of video frames, from which at least two or more video frames from have different resolutions; determining an initial motion vector (MV) corresponding to each block to be encoded in the current frame at a corresponding resolution; and determining a target MV resolution according to a resolution configuration of the current frame to represent a target resolution. The method also includes determining a target MV corresponding to each block in the current frame at the target resolution represented by the target MV resolution; obtaining a motion vector prediction (MVP) corresponding to each block in the current frame at the target resolution; and encoding the current frame according to a motion vector difference (MVD) between each target MV and the corresponding MVP such that the MV and the corresponding MVP are at a same resolution.

Method and apparatus for video encoding and decoding

This application discloses a video encoding method and apparatus, a video decoding method and apparatus, an electronic device, and a computer-readable storage medium. The method includes: obtaining a current video frame, the current video frame being divided into a plurality of tile-divided Tile regions; determining a resolution corresponding to each Tile region in the plurality of Tile regions to obtain a plurality of resolutions, the plurality of resolutions including at least two different resolutions; and decoding the Tile region based on the resolution corresponding to the Tile region among the plurality of resolutions, to obtain a decoded video frame.

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

Disclosed is a video decoding method, including: obtaining a current video frame, the current video frame being partitioned into a plurality of regions; obtaining a syntax element carried in syntax data corresponding to each of the plurality of regions, the syntax element being used for indicating a resolution used to decode the region, and a plurality of resolutions used to decode the plurality of regions including at least two different resolutions; and decoding the each of the plurality of regions by using the resolution corresponding to the region. The plurality of resolutions are determined according to a transmission bandwidth of a video stream including the current video frame from a source to a destination, e.g., by comparing the transmission bandwidth with a preset bandwidth threshold.

A video decoding method is disclosed and performed by an electronic device, the method including: obtaining a first resolution used in decoding a current block and a second resolution used in decoding a reference block in a current video frame, the reference block being a reference block used for performing directional prediction on the current block in the current video frame; building a reconstruction block from the reference block; when the first resolution is greater than the second resolution, adjusting the reconstruction block of the reference block to the first resolution to obtain a first reconstruction block; and performing directional prediction on the current block according to the first reconstruction block and the current block.

A video processing method is provided. In the method, at least one pair of decoded blocks to be reconstructed in a video frame is determined. Each pair of decoded blocks in the at least one pair of decoded blocks includes a first decoded block of a first resolution and a second decoded block of a second resolution. The first decoded block is adjacent to the second decoded block. The first resolution of the first decoded block is adjusted to a target resolution. The second resolution of the second decoded block is adjusted to the target resolution. A first edge pixel set in the first decoded block is determined. A second edge pixel set in the second decoded block is determined, the second edge pixel set being adjacent to the first edge pixel set. Further, the first edge pixel set and the second edge pixel set are filtered.

Video processing method and apparatus, storage medium, and electronic device

A video encoding code rate control method of a terminal device is provided. A space domain complexity and a time domain complexity of a first picture frame in a video stream are obtained. A first target bit of the first picture frame is updated to a second target bit according to the space domain complexity and the time domain complexity. A first initial quantization parameter of the first picture frame is updated to a second initial quantization parameter according to the space domain complexity and the time domain complexity. A compressed code stream of the first picture frame is generated according to the second target bit and the second initial quantization parameter.

Video encoding code rate control method, apparatus, and device, and storage medium

This application relates to a method and apparatus, a storage medium, and a computer device for video encoding and decoding. The video encoding method includes: determining a sub-pixel interpolation mode, the sub-pixel interpolation mode comprising one of a direct sub-pixel interpolation mode or a sampled sub-pixel interpolation mode; acquiring motion estimation pixel precision corresponding to a current video frame; performing sub-pixel interpolation processing on a reference frame corresponding to the current video frame according to a resolution relationship between the current video frame and the reference frame, the motion estimation pixel precision, and the sub-pixel interpolation mode, to obtain a target reference frame; and encoding the current video frame according to the target reference frame, to obtain encoded data corresponding to the current video frame.

Method and apparatus for video decoding

This application relates to a video encoding method performed at a computer device. The method includes: obtaining an input video frame; determining a processing parameter corresponding to the input video frame; selecting, from candidate processing manners according to the processing parameter, a target processing manner corresponding to the input video frame, the candidate processing manners comprising a full-resolution processing manner and a downsampling processing manner; and encoding the input video frame according to the target processing manner, to obtain encoded data corresponding to the input video frame. Therefore, the target processing manner of the input video frame can be flexibly selected, and the input video frame is encoded according to the target processing manner, to adaptively adjust a resolution of the input video frame, and improve video encoding quality.

Selective resolution video encoding method, computer device, and readable storage medium

This application relates to a picture sharing method, a computer device, and a storage medium. The method includes: receiving a picture compressed in a first compression manner; obtaining characteristic information of the picture; compressing the picture in a second compression manner in a case that the characteristic information meets a compression trigger condition, to obtain a compressed picture; receiving a picture download request for the picture, wherein the second compression manner has a higher compression ratio than the first compression manner; and returning the compressed picture in response to the picture download request. The solutions of this application reduce a network bandwidth occupied in a picture feedback process.

Picture sharing method, computer device, and storage medium

A video coding method is provided. The method includes obtaining an input video frame, obtaining a sampling parameter corresponding to the input video frame, determining downsampling information according to the sampling parameter, and encoding the input video frame according to the downsampling information to obtain encoded data corresponding to the input video frame, where determining the downsampling information includes: in response to determining the input video frame includes a B-frame, selecting a first downsampling proportion for the B-frame; and in response to determining the input video frame includes a P-frame, selecting a second downsampling proportion for the P-frame, the second downsampling proportion is lower than the first downsampling proportion, and the first and the second downsampling proportions are part of the downsampling information.

A video coding method includes: obtaining a current frame from a plurality of video frames to be encoded, the plurality of video frames having different resolutions; determining a target motion vector (MV) corresponding to each block in the current frame at a target resolution represented by selected target MV resolution information; obtaining a motion vector prediction (MVP) corresponding to each block and at the target resolution; and encoding the current frame according to a motion vector difference (MVD) between each target MV and the MVP of each block to obtain encoded data. The encoded data includes identification information representing the target resolution.

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Shenzhen, China

Chenchen Gu