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Motion compensation method and device using bidirectional optical flow

專利號
US11800142B2
公開日期
2023-10-24
申請人
SK TELECOM CO., LTD.(KR Seoul)
發(fā)明人
Jeong-yeon Lim; Hyo Song Kim; Hyeong-duck Kim; Se-hoon Son; Jae-seob Shin; Gyeong-taek Lee; Sun-young Lee
IPC分類
H04N19/52; H04N19/105; H04N19/14; H04N19/176
技術(shù)領(lǐng)域
motion,block,bio,prediction,vector,current,picture,vy,in,subblock
地域: Seoul

摘要

Disclosed herein is a method for adaptive bidirectional optical flow estimation for inter-screen prediction compensation during video encoding. The method aims to reduce complexity and/or cost of bidirectional optical flow (BIO) at a pixel level or a subblock level.

說明書

The adder 170 adds the reconstructed residual block to the prediction block generated by the predictor 120 to reconstruct the current block. The pixels in the reconstructed current block are used as reference samples in performing intra-prediction of the next block in order.

The filter unit 180 deblock-filters the boundaries between the reconstructed blocks in order to remove blocking artifacts caused by block-by-block encoding/decoding and stores the blocks in the memory 190. When all the blocks in one picture are reconstructed, the reconstructed picture is used as a reference picture for inter-predicting blocks in a subsequent picture to be encoded.

Hereinafter, a video decoding apparatus will be described.

FIG. 3 is an exemplary block diagram of a video decoding apparatus capable of implementing techniques of the present disclosure.

The video decoding apparatus includes a decoder 310, an inverse quantizer 320, an inverse transformer 330, a predictor 340, an adder 350, a filter unit 360, and a memory 370. As in the case of the video encoding apparatus of FIG. 2, each element of the video encoding apparatus may be implemented as a hardware chip, or may be implemented as software, and the microprocessor may be implemented to execute the functions of the software corresponding to the respective elements.

The decoder 310 decodes a bitstream received from the video encoding apparatus, extracts information related to block splitting to determine a current block to be decoded, and extracts prediction information necessary to reconstruct the current block and information about a residual signal.

權(quán)利要求

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