Huawei Technologies Co., Limited

Tsinghua University

Shenzhen Yinwang Intelligent Technologies Co., Ltd.

Yongbing Lin

Xiaozhen Zheng

Changcai Lai

Yun He

Xiaoran Cao

Jianhua Zheng

Lingzhi Liu

Xu Chen

Liqiang Wang

Quanhe Yu

Jianqin Liu

Sha Ma

Jun Chen

Jicheng An

Ce Zhu

Benben Niu

Ziwei Wei

Shichang Song

Xiaoqiang Cao

Min Mao

The present disclosure relates to positioning methods, systems, and apparatuses. One example method includes receiving, by a server, a first message from a first terminal device, where the first message includes first location information determined by the first terminal device, determining, by the server, a first reference object based on the first location information, and sending, by the server, a second message to the first terminal device, where the second message includes identification information of the first reference object, and the identification information of the first reference object is used by the first terminal device to update the first location information.

Positioning method and system, and apparatus

A method for processing an intra prediction mode includes: determining whether an intra prediction mode of each neighboring block in multiple neighboring blocks of a current block is applicable to the current block; and obtaining multiple mapped intra prediction modes of the current block according to a result of the determining, if it is determined that an intra prediction mode of a neighboring block is applicable to the current block, setting the intra prediction mode of the neighboring block as a mapped intra prediction mode of the current block, and if it is determined that the intra prediction mode of the neighboring block is not applicable to the current block, setting a specific intra prediction mode as the mapped intra prediction mode of the current block.

Method and apparatus for processing intra prediction mode

An image encoding method includes a color difference signal Cr corresponding to a first pixel and a color difference signal Cb corresponding to a second pixel that are determined based on a pixel value of the first pixel, a pixel value of the second pixel, and pixel values of a third pixel and a fourth pixel that are adjacent to the first pixel. Then, an average value Co of the color difference signal Cr corresponding to the first pixel and the color difference signal Cb corresponding to the second pixel, and a difference value Cg between the color difference signal Cr and the color difference signal Cb are determined.

Image encoding method and apparatus, and image decoding method and apparatus

An decoding method is disclosed, including: parsing a bitstream to determine whether a current coding block is required to be partitioned; when the current coding block is required to be partitioned, parsing the bitstream to determine whether the current coding blocks is partitioned in a horizontal direction or a vertical direction; partitioning the current coding block into four first rectangular subblocks in the horizontal direction or four second rectangular subblocks in the vertical direction; and reconstructing the current coding block based on the four first rectangular subblocks or the four second rectangular subblocks.

Encoding and decoding methods and apparatuses with multiple image block division manners

Embodiments of this application relate to the video coding and compression field, and disclose an encoding method and apparatus, and a decoding method and apparatus, to resolve a problem that an existing split mode cannot satisfy a relatively complex texture requirement. The decoding method specifically includes: parsing a bitstream to determine a basic split mode for a current to-be-decoded picture block and a target derivation mode for a subpicture block of the current to-be-decoded picture block; splitting the current to-be-decoded picture block into N subpicture blocks in the basic split mode, where N is an integer greater than or equal to 2; deriving one derived picture block from at least two adjacent subpicture blocks in the N subpicture blocks in the target derivation mode; and decoding the derived picture block.

Encoding method and apparatus, and decoding method and apparatus

An encoding method with multiple image block division manners is disclosed, including: determining a division manner and a division direction of an image block; dividing the image block to obtain image subblocks sequentially arranged horizontally or vertically; determining whether the image subblocks need subdivision, and if subdivision is not needed, predicting the encoding object in the frame according to the image subblocks, to obtain residual data; performing transformation, quantization, and entropy encoding for the residual data so as to obtain coded residual data; and writing the division manner of the image block, the division direction of the image block, an identifier indicating whether the image subblocks need subdivision, and the coded residual data into a bitstream. By applying the encoding method, better prediction accuracy can be achieved when the image block presents a small change of pixel value in the horizontal or vertical direction.

An image encoding and decoding method, includes: determining location information of a target reconstructed image block of a current to-be-encoded image block, where the target reconstructed image block is a reconstructed image block used to determine motion information of the current to-be-encoded image block; determining a first transform core pair based on the location information of the target reconstructed image block; and transforming a residual signal of the current to-be-encoded image block based on the first transform core pair, to obtain a transform coefficient.

Image encoding and decoding method, apparatus, and system, and storage medium to determine a transform core pair to effectively reduce encoding complexity

The present disclosure provide a transform method in picture block encoding, an inverse transform method in picture block decoding, and an apparatus. The inverse transform method includes: determining, in a target transform set, a corresponding transform pair of each region of at least two regions that constitute a to-be-decoded current block; inverse transforming each region based on the corresponding transform pair of each region to obtain an inverse transform result of each region; and obtaining an inverse transform result of the current block based on the inverse transform result of each region and a position of each region in the current block, where the at least two regions do not overlap each other, the target transform set includes a correspondence between a transform pair and a position of a region in the current block, and the transform pair includes a horizontal transform core and a vertical transform core.

Transform method in picture block encoding, inverse transform method in picture block decoding, and apparatus

Relating to the field of video coding, a method and an apparatus for building a motion vector list for motion vector prediction, which solve a problem of building motion vector lists of at least two PUs in a same coding unit in a serial manner, and improve the parallel processing capability. The method includes: obtaining spatial neighboring blocks of a current prediction block, where the current prediction block is located inside a current coding unit; determining available neighboring blocks of the current prediction block according to a partition manner of the current coding unit, where the available neighboring blocks are located outside the current coding unit; and obtaining motion vectors from the available neighboring blocks in a preset sequence according to motion vectors of the available neighboring blocks, and adding the obtained motion vectors to the motion vector list.

Method and apparatus for building motion vector list for motion vector prediction

A three-dimensional (3D) video encoding method, decoding method, and related apparatus is disclosed. The decoding method may include decoding a video bitstream to obtain a single sample flag bit corresponding to a current image block in a current depth map, performing detection on a first adjacent prediction sampling point and a second adjacent prediction sampling point of the current image block in the current depth map if the single sample flag bit obtained by decoding indicates that a decoding mode corresponding to the current image block is a single depth intra-frame mode (SDM), and constructing a sample candidate set according to results of the detection on the first adjacent prediction sampling point and the second adjacent prediction sampling point, where the sample candidate set includes a first index location and a second index location, decoding the video bitstream to obtain a single sample index flag bit corresponding to the current image block.

Three-dimensional video encoding method, three-dimensional video decoding method, and related apparatus

A method for coding an image, a method for decoding an image, a method for processing image data, and devices thereof. The method for coding the image includes determining a current intra coding block that uses a constrained intra prediction method among current inter coded frames; determining that neighboring coding blocks that are adjacent to the current intra coding block include a neighboring inter coding block; updating image data in the neighboring inter coding block based on an invariable value or image data in a neighboring intra coding block included in the neighboring coding blocks; and coding the current intra coding block based on the updated image data in the neighboring inter coding block. Using the methods and devices, the error recovery capability of an intra coding block may be improved, and the image data decoding quality may be improved.

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Beijing, China

Yongbing Lin