Refinement mode processing in video encoding and decoding

1. A method comprising:

decoding, at a block level of a slice of picture information, an indication of a filter to be applied to a reconstructed chroma component of a block of a plurality of blocks included in a picture part, wherein the filter is based on a filter parameter included in a filter parameter table selected from among a plurality of filter parameter tables; and

decoding the picture part based on the indication.

2. A non-transitory computer readable medium storing executable program instructions to cause a computer executing the instructions to perform a method according to claim 1 .

3. The method of claim 1 , wherein the indication provides for selecting the filter parameter table from among the plurality of filter parameter tables.

4. The method of claim 1 , wherein the filter is associated with a refinement mode, the refinement mode comprising at least one of a cross-component refinement or an intra-component refinement.

5. The method of claim 1 , further comprising decoding an indication of a number of the plurality of filter parameter tables and decoding the plurality of filter parameter tables.

6. An apparatus comprising:

one or more processors configured to:

decode, at a block level of a slice of picture information, an indication of a filter to be applied to a reconstructed chroma component of a block of a plurality of blocks included in a picture part, wherein the filter is based on a filter parameter included in a filter parameter table selected from among a plurality of filter parameter tables, and

decode the picture part based on the indication.

7. The apparatus of claim 6 , wherein the indication provides for selecting the filter parameter table from among the plurality of filter parameter tables.

8. The apparatus of claim 6 , further comprising:

at least one of (i) an antenna configured to receive a signal, the signal including data representative of an image, (ii) a band limiter configured to limit the received signal to a band of frequencies that includes the data representative of the image, or (iii) a display configured to display the image.

9. The apparatus of claim 8 , wherein the device apparatus further comprises at least one of a television, a cell phone, a tablet, a set-top box, and a gateway device.

10. The apparatus of claim 6 , wherein the filter is associated with a refinement mode, the refinement mode comprising at least one of a cross-component refinement or an intra-component refinement.

11. The apparatus of claim 10 , wherein the refinement parameter is selected on a block basis from a plurality of refinement parameters based on an improvement in a cost associated with encoding the picture part using the refinement mode.

12. The apparatus of claim 6 , wherein the one or processors are further configured to decode an indication of a number of the plurality of filter parameter tables and to decode the plurality of filter parameter tables.

13. The apparatus of claim 6 , wherein a given value of the indication indicates that no filter is to be applied to the reconstructed chroma component of the block.

14. The apparatus of claim 6 , wherein the selected filter is applied in an in-loop refinement process.

15. A non-transitory computer readable medium storing encoded video data formatted to include:

data representing a picture part; and

data providing, at a block level of a slice of picture information, an indication of a filter parameter table selected from among a plurality of filter parameter tables, wherein a filter based on a filter parameter included in the filter parameter table is to be applied to a reconstructed chroma component of a block of a plurality of blocks included in the picture part.

16. The non-transitory computer readable medium of claim 15 , wherein the encoded video data further includes an indication of a number of the plurality of filter parameter tables and coded data representative of the plurality of filter parameter tables.

17. A method comprising:

applying a filter to a reconstructed chroma component of a block of a plurality of blocks included in a slice of picture information included in a picture part during encoding of the picture part, wherein the filter is based on a filter parameter included in a filter parameter table selected from among a plurality of filter parameter tables; and

encoding video data including information representing the encoded picture part and including, at a block level of the slice, an indication of the selected filter parameter table.

18. The method of claim 17 , wherein the indication provides for selecting the filter parameter table from among the plurality of filter parameter tables.

19. The method of claim 17 , wherein a given value of the indication indicates that no filter is to be applied to the reconstructed chroma component of the block.

20. A non-transitory computer readable medium storing executable program instructions to cause a computer executing the instructions to perform a method according to claim 17 .

21. The method of claim 17 , wherein the filter is associated with a refinement mode, the refinement mode comprising at least one of a cross-component refinement or an intra-component refinement.

22. An apparatus comprising:

one or more processors configured to:

apply a filter to a reconstructed chroma component of a block of a plurality of blocks included in a slice of picture information included in a picture part during encoding of the picture part, wherein the filter is based on a filter parameter included in a filter parameter table selected from among a plurality of filter parameter tables; and

encode video data including information representing the encoded picture part and including, at a block level of the slice, an indication of the selected filter parameter table.

23. The apparatus of claim 22 , wherein the indication provides for selecting the filter parameter table from among the plurality of filter parameter tables.

24. The apparatus of claim 22 , wherein a given value of the indication indicates that no filter is to be applied to the reconstructed chroma component of the block.

25. The apparatus of claim 22 , wherein the filter is associated with a refinement mode, the refinement mode comprising at least one of a cross-component refinement or an intra-component refinement.

26. The apparatus of claim 25 , wherein the filter parameter is selected on a block basis from a plurality of filter parameters based on an improvement in a cost associated with encoding the picture part using the refinement mode.