Automated scanning order for sub-divided blocks

An apparatus for video decoding, comprising a processor, configured to perform:

• determining, for a current block being decoded in a picture, an intra prediction mode for each of a plurality of sub-blocks being subdivided from the current block;
• determining, based on the determined intra prediction mode for each of the plurality of sub-blocks, a corresponding dependency number indicating a number of other ones of the plurality of sub-blocks each of the plurality of sub-blocks used for spatial prediction;
• determining a scan order of the plurality of sub-blocks based on the determined corresponding dependency number for each of the plurality of the sub-blocks;
• and
• decoding the current block using the determined scan order of the plurality of sub-blocks, wherein the scan order is determined in that if two sub-blocks of the plurality of the sub-blocks have same determined dependency numbers, a z-scan order is used for scanning the two sub-blocks.

A method for video encoding, comprising:

• determining, for a current block being encoded in a picture, an intra prediction mode for each of a plurality of sub-blocks subdivided from the current block;
• determining, based on the determined intra prediction mode for each of the plurality of sub-blocks, a corresponding dependency number indicating a number of other ones of the plurality of sub-blocks each of the plurality of sub-blocks used for spatial prediction;
• determining a scan order of the plurality of sub-blocks based on the determined corresponding dependency number for each of the plurality of the sub-blocks;
• and
• encoding the current block using the determined scan order of the plurality of sub-blocks, wherein the scan order is determined in that if two sub-blocks of the plurality of the sub-blocks have same determined dependency numbers, a z-scan order is used for scanning the two sub-blocks.

A method for video encoding, comprising:

• determining, for a current block being encoded in a picture, an intra prediction mode for each of a plurality of sub-blocks subdivided from the current block;
• determining, based on the determined intra prediction mode for each of the plurality of sub-blocks, a corresponding dependency number indicating a number of other ones of the plurality of sub-blocks each of the plurality of sub-blocks used for spatial prediction;
• determining a scan order of the plurality of sub-blocks based on the determined corresponding dependency number for each of the plurality of the sub-blocks;
• and
• encoding the current block using the determined scan order of the plurality of sub-blocks, wherein if one of the plurality of the sub-blocks is further subdivided into a plurality of further-subdivided sub-blocks, a scan order of the plurality of the further-subdivided sub-blocks is set to be a similar order as the determined scan order of the plurality of the sub-blocks.

A method for video decoding, comprising:

• determining, for a current block being decoded in a picture, an intra prediction mode for each of a plurality of sub-blocks subdivided from the current block;
• determining, based on the determined intra prediction mode for each of the plurality of sub-blocks, a corresponding dependency number indicating a number of other ones of the plurality of sub-blocks each of the plurality of sub-blocks used for spatial prediction;
• determining a scan order of the plurality of sub-blocks based on the determined corresponding dependency number for each of the plurality of the sub-blocks;
• and
• decoding the current block using the determined scan order of the plurality of sub-block, wherein the scan order is determined in that if two sub-blocks of the plurality of the sub-blocks have same determined dependency numbers, a z-scan order is used for scanning the two sub-blocks.

A method for video decoding, comprising:

• determining, for a current block being decoded in a picture, an intra prediction mode for each of a plurality of sub-blocks subdivided from the current block;
• determining, based on the determined intra prediction mode for each of the plurality of sub-blocks, a corresponding dependency number indicating a number of other ones of the plurality of sub-blocks each of the plurality of sub-blocks used for spatial prediction;
• determining a scan order of the plurality of sub-blocks based on the determined corresponding dependency number for each of the plurality of the sub-blocks;
• and
• decoding the current block using the determined scan order of the plurality of sub-block, wherein if one of the plurality of the sub-blocks is further subdivided into a plurality of further-subdivided sub-blocks, a scan order of the plurality of the further-subdivided sub-blocks is set to be a similar order as the determined scan order of the plurality of the sub-blocks.