Mediatek Corporation

Cheng-Yen Chuang

Tzu-Der Chuang

Ching-Yeh Chen

Chih-Wei Hsu

Yu-Wen Huang

Chun-Chia Chen

Man-Shu Chiang

Yu-Ling Hsiao

A video encoder receives raw pixel data to be encoded as a current block of a current picture of a video into a bitstream. The video encoder identifies multiple candidate bi-prediction positions for the current block, including a center position, a first set of offset positions, and a second set of offset positions. The first set of offset positions and the second set of offset positions interleave each other. The encoder computes distortion values for each of the candidate bi-prediction positions based on several possible weighting parameter values. The distortion values for the center position are based on each of the several possible weighting parameter values. The distortion values for the first set of offset positions are based on a first subset of the possible weighting parameter values. The distortion values for the second set of offset positions are based on a second subset of the possible weighting parameter values.

Shared architecture for multiple video coding modes

Various schemes pertaining to video coding parallelization techniques are described. An apparatus receives video data. The apparatus subsequently calculates a plurality of figures of merits (FOMs), each of the FOM representing how well a particular coding tool may perform in encoding the video data. The apparatus further determines a coding tool that may be suitable for encoding the video data by comparing the FOMs. In determining the coding tool, the apparatus utilizes time-interleaving techniques to parallelly process the video data. The video data may include an array of coding blocks, and the apparatus may receive the video data using a snake-like processing order scanning through the array of coding blocks.

Video encoding parallelization with time-interleaving cache access

A video coding system generating candidates for Merge Mode with Motion Vector Difference (MMVD) with reduced resource usage is provided. The system receives data to be encoded or decoded as a current block of a current picture of a video. The system identifies multiple MMVD candidates for different offset positions based on a merge candidate of the current block. The system generates reference samples for the identified MMVD candidates. The system reconstructs the current block or encodes the current block into a bitstream by using the generated reference samples. The system processes the MMVD candidates in separate groups: a first group of vertical MMVD candidates and a second group of horizontal MMVD candidates. The system generates the reference samples for the identified MMVD candidates by applying a vertical filter to source reference samples of horizontal MMVD candidates and then applying a horizontal filter to outputs of the vertical filter.

Mmvd mode separation and interpolation reordering

Video encoding methods and apparatuses for Sum of Absolute Transformed Difference (SATD) computation by folded Hadamard transform circuits include splitting a current block into SATD blocks, receiving input data associated with a first block of a first SATD block in a first cycle and receiving input data associated with a second block of the first SATD block in a second cycle, and performing calculations for the first block by shared Hadamard transform circuits in the first cycle and performing calculations for the second block by the shared Hadamard transform circuits in the second cycle. Each shared Hadamard transform circuit is a first part of each folded Hadamard transform circuit. The video encoding methods and apparatuses further perform calculations for the entire SATD block by a final part of each folded Hadamard transform circuit to generate a final SATD result of the first SATD block for encoding.

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Hsinchu, Taiwan

Cheng-Yen Chuang