Qualcomm Incorporated

Apple Inc.

Beijing Bytedance Network Technology Co., Ltd.

Bytedance Inc.

Jaehong Chon

In Suk Chong

Marta Karczewicz

Xianglin Wang

Wei-Jung Chien

Li Feng Zhang

Xin Zhao

Yue Wang

Woo-Shik Kim

Chengjie Tu

Jizheng Xu

Alexandros Michael Tourapis

David William Singer

Athanasios Leontaris

Jim Chen Chou

Weijia Zhu

Cheng-Teh Hsieh

Hsiao Chiang Chuang

Krishnakanth Rapaka

Jae Y Park

Hariharan Ganesh Lalgudi

Jiexi Wang

The present disclosure is directed towards image processing circuitry that applies temporal filtering to video image data along motion trajectories in the video image data. The temporal filtering may be applied along motion trajectories in the image data, by filtering source pixels by reference pixel values and the refined motion vectors. The temporal filtering circuitry may fetch source and reference pixel values based on received motion vectors from an encoding pipeline. Additionally, the temporal filtering circuitry may include a motion vector refinement block along with a temporal filtering block, such that the video image data may be filtered based on refined motion vectors and source and reference pixel values.

Systems and methods for motion compensated temporal filtering during image processing operations

A method for processing video data is described and the method includes: deriving, for a conversion between a video processing unit of the video and a bitstream of the video processing unit, at least one deblocking filter associated with a chroma deblocking filter process of the video processing unit; applying a same deblocking filter from the at least one deblocking filter for all chroma components of the video processing unit; and performing the conversion based on the same deblocking filter.

Chroma deblocking harmonization for video coding

Improved video coding and decoding techniques are described, including techniques to derive quantization step sizes adaptively with quantization step size table templates. Quantization techniques described provide finer-grained control over quantization with a more flexible quantization step size especially at higher degrees of quantization. This may result in improved overall compression quality. Other coding parameters, such as in-loop filtering parameters, may be derived based on the more flexible quantization parameters.

Adaptive quantizer design for video coding

History based motion vector prediction is disclosed. In one example method of video processing, initializing, for a conversion between a first region of video and a bitstream of the first region, a first history motion vector predictor (HMVP) table associated with the first region based on at least one of stored multiple HMVP tables, the multiple HMVP tables being used to store motion information associated with regions coded prior the first region; and performing the conversion by using the initialized first HMVP table which includes at least one motion candidate.

History-based motion vector prediction

A video encoding device comprises a memory configured and at least one processor configured to: determine whether a metric meets a condition based on statistics, wherein the statistics are associated with a first video encoding mode checking order and a second video encoding mode checking order, responsive to determining that the metric meets the condition, select a first encoding mode checking order to encode the first block of video data responsive to determining that the condition is not met, select a second encoding mode checking order different from the first encoding mode checking order to encode the first block of video data, update the statistics based on the selected first or second encoding mode checking order, and encode a second block of video data, based on the updated statistics, and using the first or second mode checking order.

Adaptive mode checking order for video encoding

To encode video data, a video encoder partitions a 2N&#xd7;2N block of video data into four N&#xd7;N blocks, determines encoding modes for each of the four N&#xd7;N blocks, calculates values representative of encoded versions of the four N&#xd7;N blocks using the encoding modes for each of the four N&#xd7;N blocks, determines whether to skip testing of at least one non-square partitioning mode for the 2N&#xd7;2N block based on the calculated values, and encodes the 2N&#xd7;2N block based at least in part on the determination of whether to skip testing of the at least one non-square partitioning mode.

Optimization for encoding video data using non-square partitions

An example method includes determining a respective variance value for pixels of each respective sub-block of at least four sub-blocks of a current block of video data of a particular block size; determining an average of the determined variance values for the at least four sub-blocks; determining a maximum difference value for the current block based on the average and the variance values for the at least four sub-blocks; determining whether pixels of the current block are homogeneous based on whether the maximum difference value for the current block satisfies a threshold difference value; and in response to determining that the pixels of the current block are homogeneous, selectively including block sizes that are greater than or equal to a threshold block size in a sub-set of block sizes to evaluate for use when intra encoding the pixels of the current block.

Block size decision for video coding

A video encoding device comprises a memory configured to store video data and at least one processor configured to: select one of a full rate-distortion (RD) checking scheme or a fast RD checking scheme, determine an RD cost associated with encoding a block of the video data based on the selected full RD checking scheme or fast RD checking scheme, determine a partitioning scheme for the block based on the determined RD cost, and encode the block using the determined partitioning scheme based on the determined RD cost.

Fast video encoding method with block partitioning

Systems, methods, and devices are disclosed that encode video, decode video, or both. These systems, methods, and devices generate and/or receive an enable syntax element in an encoded bitstream, wherein the enable syntax element indicates whether a loop filter is turned on or turned off for a group of video blocks. They also generate or receive one or more additional syntax elements identifying parameters for the loop filter for the group of video blocks in response to the enable syntax element indicating the loop filter is turned on for the group of video blocks. These systems, methods, and devices also perform the loop filter for the group of video blocks based on the received enable syntax element.

Merge signaling and loop filter on/off signaling

A video coding device configured according to some aspects of this disclosure includes a memory configured to store a plurality of motion vector candidates. Each motion vector candidate can corresponding to at least one of a plurality of prediction units (PUs) partitioned in a parallel motion estimation region (MER). The video coding device also includes a processor in communication with the memory. The processor is configured to select a subset of the plurality of motion vector candidates to include in a merge candidate list. The selection can be based on a priority level of each motion vector candidate. The processor can be further configured to generate the merge candidate list to include the selected motion vector candidates.

Growing community of inventors

San Diego, CA, United States of America

Jaehong Chon