Method and apparatus for sub-picture based raster scanning coding order
A method and apparatus for sub-picture based raster scanning coding order. The method includes dividing an image into even sub-pictures, and encoding parallel sub-pictures on multi-cores in raster scanning order within sub-pictures, wherein from core to core, coding of the sub-picture is independent around sub-picture boundaries, and wherein within a core, coding of a sub-picture is at least one of dependent or independent around sub-picture boundaries.
1. A system, comprising:
one or more processors;
a memory coupled to the one or more processors, the memory configured to store a bit stream for a picture, the picture comprising:
a first sub-picture comprising a first set of non-overlapping blocks; and
a second sub-picture comprising a second set of non-overlapping blocks; and
the bit stream comprising:
data for each non-overlapping block in the first set of non-overlapping blocks in a first sub-picture scan order, the first subpicture-scan order being based on the position of each non-overlapping block of the first set of non-overlapping blocks in the first sub-picture; and
following the data for each non-overlapping block in the first set of non-overlapping blocks in the first sub-picture scan order, data for each non-overlapping block in the second set of non-overlapping blocks in a second sub-picture scan order, the second subpicture-scan order being based on the position of the each non-overlapping block of the second set of non-overlapping blocks in the second sub-picture.
2. The system of claim 1 , wherein the first sub-picture scan order is a raster-scan order in the first sub-picture.
3. The system of claim 1 , wherein the second sub-picture scan order is a raster-scan order in the second sub-picture.
4. The system of claim 1 , wherein the first sub-picture is rectangular and the second sub-picture is rectangular.
5. The system of claim 1 , wherein a non-overlapping block in the first set of non-overlapping blocks share an edge with a non-overlapping block in the second set of non-overlapping blocks.
6. The system of claim 1 , wherein a portion of the coding for the first sub-picture is independent of a portion of the coding for the second sub-picture.
7. The system of claim 6 , wherein coding an in-loop filter for the second set of non-overlapping blocks is independent of the first set of non-overlapping blocks.
8. The system of claim 6 , wherein coding an in-loop filter for the second set of non-overlapping blocks is dependent on a non-overlapping block in the first set of non-overlapping blocks.
9. A system, comprising:
a memory;
one or more processors configured to:
receive a bit stream for a picture, the picture comprising:
a first sub-picture having a first set of non-overlapping blocks; and
a second sub-picture having a second set of non-overlapping blocks; and
the bit stream comprising:
data for each non-overlapping block in the first set of non-overlapping blocks in a first sub-picture scan order, the first subpicture-scan order being based on the position of each non-overlapping block of the first set of non-overlapping blocks in the first sub-picture; and
following the data for each non-overlapping block in the first set of non-overlapping blocks in the first sub-picture scan order, data for each non-overlapping block in the second set of non-overlapping blocks in a second sub-picture scan order, the second subpicture-scan order being based on the position of each non-overlapping block of the second set of non-overlapping blocks in the second sub-picture.
10. The system of claim 8 , wherein the first sub-picture scan order is a raster-scan order in the first sub-picture.
11. The system of claim 8 , wherein the second sub-picture scan order is a raster-scan order in the second sub-picture.
12. The system of claim 8 , wherein the first sub-picture is rectangular and the second sub-picture is rectangular.
13. The system of claim 8 , wherein a non-overlapping block in the first set of non-overlapping blocks share an edge with a non-overlapping block in the second set of non-overlapping blocks.
14. The system of claim 8 , wherein a portion of the coding for the first sub-picture is independent of a portion of the coding for the second sub-picture.
15. The system of claim 14 , wherein coding an in-loop filter for the second set of non-overlapping blocks is independent of the first set of non-overlapping blocks.
16. The system of claim 14 , wherein coding an in-loop filter for the second set of non-overlapping blocks is dependent on a non-overlapping block in the first set of non-overlapping blocks.
17. A method, comprising:
determining a position for each non-overlapping block in a picture in a first sub-picture scan order, the first sub-picture scan order being based on a position of each non-overlapping block in the picture, the picture comprising:
a first sub-picture having a first set of non-overlapping blocks;
a second sub-picture having a second set of non-overlapping blocks; and
determining a sub-picture position of a single non-overlapping block from the picture position of the single non-overlapping block by:
determining a sub-picture from the first sub-picture or the second sub-picture that contains the single non-overlapping block; and
determining the sub-picture position of the single non-overlapping block based on a second sub-picture scan order, the second sub-picture scan order based on the position of the single non-overlapping block in the determined sub-picture.
18. The method of claim 17 , wherein the first sub-picture scan order is a raster-scan order in the picture.
19. The method of claim 18 , wherein the second sub-picture scan order is a raster-scan order in the determined sub-picture.
20. The system of claim 19 , wherein the first sub-picture is rectangular and the second sub-picture is rectangular.
21. A method, comprising:
receiving a coded picture comprising a first ordered sequence of non-overlapping blocks;
dividing the coded picture into a set of non-overlapping sub-pictures;
decoding the non-overlapping blocks within a first sub-picture in the set of non-overlapping sub-pictures according to a second ordered sequence of non-overlapping blocks, wherein the second ordered sequence of non-overlapping blocks is different than the first ordered sequence of non-overlapping blocks.
22. The method of claim 21 , wherein the first ordered sequence of non-overlapping blocks is a raster-scan order spanning the picture.
23. The method of claim 22 , wherein the second sub-picture scan order is a raster-scan order spanning the first sub-picture.
24. The method of claim 23 , wherein the first sub-picture is rectangular.
25. The method of claim 21 , further comprising:
decoding the non-overlapping blocks within a second sub-picture in the set of non-overlapping sub-pictures according to a third ordered sequence of non-overlapping blocks, wherein the third ordered sequence of non-overlapping blocks is different than the second ordered sequence of non-overlapping blocks.
26. The method of claim 25 , wherein the third sub-picture scan order is a raster-scan order spanning the second sub-picture.