Tencent Technology (shenzhen) Company Limited

Ye Hu

Liqiang Wang

Shan Liu

Xiaozhong Xu

Yingbin Wang

Yiming Li

Zhenzhong Chen

A video decoding method includes determining, from among plural value intervals, a first value interval to which an absolute value of a displacement vector difference of a current decoding unit in a first direction belongs. The method further includes determining, based on the first value interval, that the displacement vector difference in the first direction has a prefix value and a suffix value, and determining, based on the first value interval, a first suffix decoding method for decoding the suffix value. The method further includes performing decoding processing on a first suffix part in a bitstream using the determined first suffix decoding method, to obtain the suffix value corresponding to the displacement vector difference in the first direction. The method further includes determining, based on the prefix value and the suffix value, the displacement vector difference in the first direction.

Selecting a coding method for suffix values for displacement vector differences based on value intervals

A video decoding method includes obtaining a size of a coding block of a video image frame, and decoding a bitstream of the coding block to obtain a value of a range variable associated with a SRCC scan region of the coding block. The range variable includes a width range variable and a height range variable. Each of the width range variable and the height range variable are obtained by comparing a prefix value to one or more predefined value intervals. The method further includes determining a horizontal coordinate of boundary coordinates of the SRCC scan region according to a difference between the width of the coding block and the width range variable and determining a vertical coordinate of the boundary coordinates of the SRCC scan region according to a difference between the height of the coding block and the height range variable.

Coding efficiency of boundary coordinates of SRCC scan region

A video encoding method includes: determining current coefficients to-be-decoded in a coding block of a video image frame; obtaining a flag combination corresponding to the current coefficients, the flag combination including at least two coefficient absolute level threshold flags; decoding the coefficient absolute level threshold flags in the flag combination to obtain values of the coefficient absolute level threshold flags; and determining the coefficient absolute levels of the current coefficients according to the values of the coefficient absolute level threshold flags.

Video encoding and decoding method and apparatus based on non-zero coefficient absolute level, computer-readable medium, and electronic 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 method includes: segmenting to-be-decoded coefficients according to a scan order of a scan region-based coefficient coding (SRCC) scan region in a coding block of a video image frame to obtain one or more coefficient parts each including a plurality of coefficients; decoding a coefficient part all zero flag of each of the coefficient parts to obtain a value of the coefficient part all zero flag; decoding a significant flag of each coefficient in the coefficient part according to the scan order in response to the value of the coefficient part all zero flag being a preset first value, the significant flag being used for indicating whether the coefficient is a non-zero coefficient; and setting the significant flag of each coefficient in the coefficient part to zero, in response to the value of the coefficient part all zero flag being a preset second value.

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

A data decoding method, performed by a computer device, is provided. The data decoding method includes obtaining coded data corresponding to a current to-be-decoded unit, obtaining a coding mode restriction type corresponding to the current to-be-decoded unit by decoding the coded data, determining a candidate coding mode set corresponding to the current to-be-decoded unit according to the coding mode restriction type, the candidate coding mode set comprising a block copy intra-frame coding mode, selecting a target coding mode from the candidate coding mode set, and decoding the current to-be-decoded unit according to the target coding mode, thereby obtaining corresponding decoded data.

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Shenzhen, China

Ye Hu