Tencent America LLC

Hfi Innovation Inc.

Mediatek Corporation

Huawei Technologies Co., Limited

Future Wei Technologies, Inc.

Mediatek Singapore Pte. Ltd.

Tencent Technology (shenzhen) Company Limited

At&t Intellectual Property Ii, L.p.

Other

At&t Corp.

Shan Liu

Xin Zhao

Xiaozhong Xu

Xiang Yang Li

Liang Zhao

Stephan Wenger

Byeongdoo Choi

Guichun Li

Xiang Li

Xiang Zhang

Jing Ye

Wen Gao

Wei Jiang

Madhu Peringassery Krishnan

Sehoon Yea

Lien-Fei Chen

Yixin Du

Tzu-Der Chuang

Jun Tian

Meng Xu

Han Gao

Wei W Wang

Ling Li

Arash Vosoughi

Cheung Auyeung

Wei Wang

Chao Huang

Wang-Lin Lai

Shaw-Min Lei

Ding Ding

Shuai Zhao

Ching-Yeh Chen

Yu-Wen Huang

Yu-Chen Sun

Jungsun Kim

Sheng Lin

Wang Lin Lai

Weiwei Feng

Lulin Chen

Haitao Yang

Zhenzhong Chen

Iraj Sodagar

Yiming Li

Chih-Wei Hsu

Yin Zhao

Mei Guo

Zeqiang Li

Thuong Nguyen Canh

David Crawford Gibbon

Andrea Basso

Yi-Wen Chen

Xin Ru Wang

Eric Cosatto

Hans Peter Graf

Bing Jian

Roman Chernyak

Ximin Zhang

Han Huang

Xiang Ma

Shan Gao

Ding-Yun Chen

Hong Zhang

Jiantong Zhou

Jiali Fu

Yu Wang

Anish Tamse

Huanbang Chen

Bin Zhu

Yingbin Wang

Semih Esenlik

Anand Meher Kotra

Zhijie Zhao

Jicheng An

Sergey Yurievich Ikonin

Shih-Ta Hsiang

Roman Igorevich Chernyak

Xianguo Zhang

Victor Alexeevich Stepin

Sijia Chen

Jian-Liang Lin

Yung-Chang Chang

Alexey Konstantinovich Filippov

Vasily Alexeevich Rufitskiy

Weijia Zhu

Yi Li

Lei Li

Chih-Ming Fu

Ying Hu

Sriram Sethuraman

Fai Yeung

Qing Zhang

Chia-Yang Tsai

Alexander Alexandrovich Karabutov

Tao Zhang

Jeeva Raj A

Sagar Kotecha

Wenbo Li

Shitao Wang

A method for applying adaptive weightings on intra prediction and inter prediction parts in compound inter-intra prediction modes includes defining a template area of neighboring reconstruction or prediction samples, applying one or more adaptive weighting candidates to the template area to generate one or more prediction samples using compound inter-intra prediction, calculating a cost value for each of the one or more adaptive weighting candidates, selecting the adaptive weighting candidate that provides the lowest cost as the weighting used for decoding a block with compound inter-intra prediction mode, and decoding the block based on the selected adaptive weighting.

Compound inter-intra prediction modes

Aspects of the disclosure provide a method and an apparatus including processing circuitry for video decoding. The processing circuitry decodes coded information for a transform block (TB) from a coded video bitstream. The coded information indicates one of intra prediction mode information that indicates an intra prediction mode used for the TB, a size of the TB, and a primary transform type used for the TB. The processing circuitry determines a context for entropy decoding a secondary transform index based on the one of the intra prediction mode information for the TB, the size of the TB, and the primary transform type used for the TB. The secondary transform index indicates a secondary transform in a set of secondary transforms that is to be performed on the TB. The processing circuitry entropy decodes the secondary transform index based on the context and performs the secondary transform.

Entropy coding a secondary transform index based on primary transform type

This disclosure relates encoding and decoding of motion vector difference in for inter-predicting a video block. An example is disclosed for decoding an inter-predicted video block of a video stream. The method includes receiving a coded video bitstream; extracting, from the coded video bitstream, an inter-predication mode and a joint delta motion vector (MV) for a current block in a current frame; extracting, from the coded video bitstream, a flag indicating whether a first delta MV for a first reference frame and a second delta MV for a second reference frame are jointly signaled; in response to the flag indicating that the first delta MV and the second delta MV are jointly signaled, deriving the first delta MV and the second delta MV based on the joint delta MV; and decoding the current block in the current frame based on the first delta MV and the second delta MV.

Joint motion vector difference coding

A decoding device is provided for decoding of a bitstream, and more specifically for predicting a picture area of an input image for decoding. The picture area has been divided into at least first and second parts by a partitioning boundary, and the pixels of each part are predicted according to suitable measures. Blending masks are then applied to generate blended regions for the predicted pixels, modifying the pixels to generate a complete prediction of the picture area based on both parts. The blending mask is based on first and second thresholds, which are defined relative to the partitioning boundary, and which may have different values to produce an asymmetrical blending relative to the boundary. Based on suitable threshold values, the prediction, combination, and decoding of the picture area is more adaptive to differing contents of the parts therein.

Method and apparatus for asymmetric blending of predictions of partitioned pictures

Aspects of the disclosure provide a method and a vertical application layer (VAL) server for a media session management in wireless communication. The method includes obtaining session description protocol (SDP) information within a session initiation protocol (SIP) payload associated with a media session and sending a network resource request comprising the SDP information, by a processing circuitry of a media session management module of the VAL server, to a network resource management (NRM) server. The NRM server can be a service enabler architecture layer (SEAL) server. The network resource request can request a network resource. The method further includes receiving, by the VAL server, an evaluation for the network resource request from the NRM server. The media session can be established or terminated based on the received evaluation in the media session management module of the VAL server.

Method and apparatus for media session management for service enabler architecture layer (SEAL) architecture

This disclosure relates generally to video coding/decoding and particularly for evaluating codec performance. One method includes obtaining a first plurality of anchor data points; obtaining a second plurality of test data points; analyzing monotonicity conditions of the first plurality of anchor data points and the second plurality of test data points; determining a fitting algorithm based on the analyzed monotonicity conditions; fitting the first plurality of anchor data points with the fitting algorithm to obtain an anchor curve; fitting the second plurality of test data points with the fitting algorithm to obtain a test curve; and evaluating the test codec performance based on the anchor curve and the test curve, to obtain an evaluation result.

Methods and devices for video codec performance measurement and evaluation

A video bitstream is received. The video bitstream includes a current block comprising a plurality of subblocks and a template region of the current block comprising a plurality of template subblocks adjacent to at least one of a top side and a left side of the current block. A motion vector (MV) located in a center position of the current block is determined. The MV is determined based on at least one MV of the plurality of subblocks of the current block. A MV for each of the plurality of template subblocks is determined based on the MV located in the center position of the current block and a respective MV of a corresponding subblock of the plurality of subblocks that is adjacent to the respective template subblock. The current block is reconstructed based on the determined MVs for the plurality of template subblocks.

Motion vector derivation of subblock-based template-matching for subblock based motion vector predictor

This disclosure relates generally to video coding and particularly to cross component level reconstruction. For example, a method is disclosed for processing video data which may include encoding a video block comprising a first transform block of a first color component and a second transform block of a second color component, wherein the first transform block and the second transform blocks are co-located blocks; encoding a first syntax element to signal whether a CCLR is applied to the first transform block, wherein, when CCLR is applied to the first transform block, a refinement process is required to be applied to the first transform block to obtain a refined first transform block on which an inverse transform is to be performed; and transmitting a bitstream comprising the video block and the first syntax element.

Primary transforms for cross-component level reconstruction

Systems and methods for encoding and decoding using syntax design for multi-symbol arithmetic coding are provided. A method includes receiving a coded video bitstream including a plurality of syntax elements; determining a first maximum alphabet size for arithmetic coding by an arithmetic coding engine, the first maximum alphabet size determined based on a hardware constraint; determining a second maximum alphabet size that is less than the first maximum alphabet size; and decoding the plurality of syntax elements included in the coded video bitstream, based on the determined second maximum alphabet size, wherein each of the plurality of syntax elements is entropy coded with an alphabet size less than or equal to the determined second maximum alphabet size.

Systems and methods including syntax design for multi-symbol arithmetic coding

In a method for video decoding in a decoder, transform coefficients associated with a coding block that is an L-shaped partition of a picture are decoded, by a processor and from a coded video bitstream. The L-shaped partition of the picture is partitioned into a plurality of rectangular sub-blocks when the coding block is the L-shaped partition, each corner of the L-shaped partition being a right angle. Residuals of each of the plurality of rectangular sub-blocks in the coding block are determined, by the processor, based on the transform coefficients of the respective rectangular sub-block. Samples of the coding block are reconstructed, by the processor, based on the residuals of the coding block.

Transform for L-shaped partition

A method and an apparatus including processing circuitry are provided. The processing circuitry determines previous probability information associated with each entropy coded region of multiple regions in a previous picture. The processing circuitry selects, based on (i) a location or a quantization parameter of an independently decodable coding segment in a current picture or (ii) syntax information of the independently decodable coding segment, a region among the multiple regions. Initial probability information for one or more current syntax elements of a block in the independently decodable coding segment is determined based on the previous probability information associated with the selected region. The one or more current syntax elements are first to be entropy decoded in the independently decodable coding segment. The processing circuitry entropy decodes coded bits associated with the one or more current syntax elements into a bin string based on the initial probability information.

Adaptive context-based adaptive binary arithmetic coding (CABAC) initial state selection from coded pictures

The various implementations described herein include methods and systems for coding video. In one aspect, a method includes receiving a video bitstream that includes encoded video data and one or more syntax elements indicating one or more clipping ranges. The method includes deriving, based on the one or more syntax elements, the one or more clipping ranges for a portion of the encoded video data. Each of the one or more clipping ranges modifies a range of sample values of the received video bitstream. The method includes performing one or more clipping operations on the encoded video data using the derived one or more clipping ranges.

Adaptive range for clipping processes for video and image compression

Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes receiving circuitry and processing circuitry. The processing circuitry extracts, from a bitstream, a signal indicative of an application of a template matching based block vector refinement for coding a current block in a current picture referencing (CPR) mode. The processing circuitry derives a first refined block vector associated with the current block according to the template matching based block vector refinement. The first refined block vector includes a first block vector refinement offset applied on a first block vector associated with the current block. The processing circuitry reconstructs the current block according to a first reference block in a same picture as the current block, the first reference block being indicated by the first refined block vector.

Block vector refinement method for intra block copy

The disclosure includes methods and apparatuses that includes processing circuitry that derives a chroma prediction mode of a chroma block in a chroma coding region based on luma coding information of a luma block associated with a position in a reconstructed luma area that is collocated with the chroma block. The chroma coding region is partitioned separately from a collocated luma coding region including the reconstructed luma area. The luma coding information indicates that the luma block is coded with a first coding mode using a first luma BV (an IBC mode or an IntraTMP mode) and a second coding mode. The processing circuitry derives a chroma BV of the chroma block based on a luma BV of the luma block and reconstructs the chroma block based on the chroma prediction mode including the first coding mode and the second coding mode.

Chroma block vector and chroma coding mode derivation

Aspects of the disclosure provide methods and apparatuses for video encoding/decoding. In some examples, an apparatus for video decoding includes processing circuitry. For example, the processing circuitry decodes prediction information of a current block from a coded video bitstream. The prediction information indicates that a prediction of the current block is at least partially based on an inter prediction. Then, the processing circuitry reconstructs at least a sample of the current block as a combination of a result from the inter prediction and neighboring samples of the block that are selected based on a position of the sample.

Method and apparatus for video coding

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San Jose, CA, United States of America

Shan Liu