Block-based adaptive resolution management

1. A decoder, the decoder comprising circuitry configured to:

receive a reference frame and a bitstream, wherein an adaptive resolution management is signaled in the bitstream;

determine, for a current block, a scaling constant, wherein the scaling constant is signaled within the bitstream using a reference to an index of a stored scaling constants;

scale a block of the reference frame according to the scaling constant, the block of the reference frame corresponding to the current block;

apply a spatial filter to the scaled block as a function of the adaptive resolution management; and

reconstruct pixel data of the current block using the scaled block of the reference frame.

2. The decoder of claim 1 , wherein the scaling constant further comprises a height scaling constant.

3. The decoder of claim 1 , wherein the scaling constant further comprises a width scaling constant.

4. The decoder of claim 1 , wherein the decoder is configured to scale the block of the reference frame by interpolating pixel values.

5. The decoder of claim 4 , wherein interpolating the pixel values is performed using a luma sample interpolation process.

6. The decoder of claim 4 , wherein interpolating the pixel values further comprises shifting a pixel value.

7. The decoder of claim 1 , wherein reconstructing the pixel data includes processing the current block with an inter-prediction mode, wherein reconstructing includes determining the current block by at least combining a predicted block with a residual, wherein the predicted block is determined using the scaled block of the reference frame.

8. The decoder of claim 1 , wherein the current block includes a coding unit.

9. The decoder of claim 1 , wherein the current block includes a coding tree unit.

10. The decoder of claim 1 , wherein the spatial filter is a bicubic spatial filter.

11. A method, the method comprising:

receiving a reference frame and a bitstream, wherein an adaptive resolution management is signaled in the bitstream;

determining, for a current block, a scaling constant, wherein the scaling constant is signaled within the bitstream using a reference to an index of a stored scaling constants;

scaling a block of the reference frame according to the scaling constant, the block of the reference frame corresponding to the current block;

applying a spatial filter to the scaled block as a function of the adaptive resolution management to the scaled block; and

reconstructing pixel data of the current block and using the scaled block of the reference frame.

12. The method of claim 11 , wherein the scaling constant further comprises a height scaling constant.

13. The method of claim 11 , wherein the scaling constant further comprises a width scaling constant.

14. The method of claim 11 , wherein the scaling the block of the reference frame includes interpolating pixel values.

15. The method of claim 14 , wherein interpolating the pixel values is performed using a luma sample interpolation process.

16. The method of claim 14 , wherein interpolating the pixel values further comprises shifting a pixel value.

17. The method of claim 11 , wherein reconstructing the pixel data includes processing the current block with an inter-prediction mode, wherein the processing further includes determining the current block by at least combining a predicted block with a residual, wherein the predicted block is determined using the scaled block of the reference frame.

18. The method of claim 11 , wherein the current block includes a coding unit.

19. The method of claim 11 , wherein the current block includes a coding tree unit.

20. The method of claim 11 , wherein the spatial filter is a bicubic spatial filter.