Method and Apparatus of Subblock Deblocking in Video Coding

An apparatus of Inter prediction for video coding, the apparatus comprising one or more electronic circuits or processors arranged to:

• receive input data related to a current block in a current picture at a video encoder side or a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder side;
• determine a block boundary of the current block and sub-block boundaries inside the current block, wherein the current block is partitioned into a plurality of sub-blocks using sub-block mode prediction;
• apply de-blocking process to a reconstructed current block corresponding to the current block to result in a current filtered-reconstructed block, wherein the de-blocking process applied to the current block comprises applying the de-blocking process to the sub-block boundaries inside the current filtered-reconstructed block;
• and
• generate a filtered decoded picture including the current filtered-reconstructed block.

A method of de-blocking of reconstructed picture in for video encoding or video decoding, the method comprising:

• receiving input data related to a current block in a current picture at a video encoder side or a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder side;
• determining a first boundary and a second boundary associated with the current block, wherein the first boundary and the second boundary correspond to two vertical boundaries or two horizontal boundaries of the current block;
• applying de-blocking process to a reconstructed current block corresponding to the current block to result in a filtered-reconstructed current block, wherein if one or more first reference samples used for the de-blocking process of the first boundary are to be modified by the de-blocking process of the second boundary, said one or more first reference samples are replaced by one or more padding samples that are not to be modified by the de-blocking process of the second boundary;
• and
• generating a filtered decoded picture including the filtered-reconstructed current block.

An apparatus of Inter prediction for video coding, the apparatus comprising one or more electronic circuits or processors arranged to:

• receive input data related to a current block in a current picture at a video encoder side or a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder side;
• determine a first boundary and a second boundary associated with the current block, wherein the first boundary and the second boundary correspond to two vertical boundaries or two horizontal boundaries of the current block;
• apply de-blocking process to a reconstructed current block corresponding to the current block to result in a filtered-reconstructed current block, wherein if one or more first reference samples used for the de-blocking process of the first boundary are to be modified by the de-blocking process of the second boundary, said one or more first reference samples are replaced by one or more padding samples that are not to be modified by the de-blocking process of the second boundary;
• and
• generate a filtered decoded picture including the filtered-reconstructed current block.

A method of de-blocking of reconstructed picture in for video encoding or video decoding, the method comprising:

• receiving input data related to a current block in a current picture at a video encoder side or a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder side;
• applying de-blocking process to a reconstructed current block corresponding to the current block to result in a current filtered-reconstructed block regardless whether a boundary of the current block corresponds to 8×8 sample grid boundaries;
• and
• generating a filtered decoded picture including the current filtered-reconstructed block.

An apparatus of Inter prediction for video coding, the apparatus comprising one or more electronic circuits or processors arranged to:

• receive input data related to a current block in a current picture at a video encoder side or a video bitstream corresponding to compressed data including the current block in the current picture at a video decoder side;
• apply de-blocking process to a reconstructed current block corresponding to the current block to result in a current filtered-reconstructed block regardless whether a boundary of the current block corresponds to 8×8 sample grid boundaries;
• and
• generate a filtered decoded picture including the current filtered-reconstructed block.