Inferred base layer block for TEXTURE

1. An apparatus configured to code video data using a single-loop decoding approach, the apparatus comprising:

a memory unit configured to store the video data, wherein the video data comprises a base layer and an enhancement layer, wherein the base layer comprises a base layer block in a first frame, a first block in the first frame, and a second block in the first frame, wherein the first block is predicted based on pixels neighboring the first block, wherein the pixels neighboring the first block are reconstructed based on a third block in a second frame different from the first frame, and wherein the second block is predicted based on a fourth block in a third frame different from the first frame and the second frame; and

a processor in communication with the memory unit, the processor configured to:

generate a predictor for the base layer block based on one or more first pixel values in the enhancement layer;

approximate a reconstruction of the base layer block by approximating pixel values of the base layer block based on the predictor for the base layer block and a prediction residual for the base layer block, wherein the base layer block is located at least partially within a portion of the first block and a portion of the second block; and

determine, based at least in part on the approximated pixel values of the base layer block, second pixel values of an enhancement layer block in the first frame in the enhancement layer, wherein the enhancement layer block is located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer.

2. The apparatus of claim 1 , wherein the base layer block spans multiple prediction units of the base layer.

3. The apparatus of claim 1 , wherein the processor is further configured to:

determine a residual value associated with the enhancement layer block;

transform the residual value to determine transform coefficients; and

entropy encode the transform coefficients as an encoded bitstream.

4. The apparatus of claim 1 , wherein the processor is further configured to:

decode transform coefficients for a residual value of the enhancement layer block;

inverse transform the transform coefficients to determine the residual value; and

determine a reconstructed block from the residual value and the determined pixel values of the enhancement layer block.

5. The apparatus of claim 1 , wherein the first block comprises a non-constrained intra mode block and the second block comprises an inter mode block.

6. A method for decoding video data using a single-loop decoding approach, the method comprising:

receiving syntax elements extracted from an encoded video bitstream;

generating a predictor for a base layer block of a base layer of the video data based on one or more first pixel values in an enhancement layer of the video data;

approximating a reconstruction of the base layer block by approximating pixel values of the base layer block based on the predictor for the base layer block and a prediction residual for the base layer block, wherein the base layer comprises a first block in a first frame and a second block in the first frame, wherein the first block is predicted based on pixels neighboring the first block, wherein the pixels neighboring the first block are reconstructed based on a third block in a second frame different from the first frame, wherein the second block is predicted based on a fourth block in a third frame different from the first frame and the second frame, and wherein the base layer block is located at least partially within a portion of the first block and a portion of the second block; and

determining, based at least in part on the approximated pixel values of the base layer block, second pixel values of an enhancement layer block of the enhancement layer of the video data, wherein the enhancement layer block is located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer.

7. The method of claim 6 , wherein the base layer block spans multiple prediction units of the base layer.

8. The method of claim 6 , wherein the first block comprises a non-constrained intra mode block and the second block comprises an inter mode block.

9. The method of claim 6 , further comprising determining prediction information for the first block and the second block based on the syntax elements.

10. The method of claim 6 , further comprising:

decoding transform coefficients extracted from the bitstream for a residual value of the enhancement layer block;

inverse transforming the transform coefficients to determine the residual value; and

determining a reconstructed block from the residual value and the determined pixel values of the enhancement layer block.

11. A method for encoding video data using a single-loop decoding approach, the method comprising:

generating a predictor for a base layer block of a base layer of the video data based on one or more first pixel values in an enhancement layer of the video data;

approximating a reconstruction of the base layer block by approximating pixel values of the base layer block based on the predictor for the base layer block and a prediction residual for the base layer block, wherein the base layer comprises a first block in the first frame and a second block in the first frame, wherein the first block is predicted based on pixels neighboring the first block, wherein the pixels neighboring the first block are reconstructed based on a third block in a second frame different from the first frame, wherein the second block is predicted based on a fourth block in a third frame different from the first frame and the second frame, and wherein the base layer block is located at least partially within a portion of the first block and a portion of the second block;

determining, based at least in part on the approximated pixel values of the base layer block, second pixel values of an enhancement layer block of the enhancement layer of the video data, wherein the enhancement layer block is located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer; and

determining a residual value based on the determined pixel values of the enhancement layer block.

12. The method of claim 11 , wherein the base layer block spans multiple prediction units of the base layer.

13. The method of claim 11 , wherein the first block comprises a non-constrained intra mode block and the second block comprises an inter mode block.

14. The method of claim 11 , further comprising:

transforming the residual value to determine transform coefficients; and

entropy encode the transform coefficients as an encoded bitstream.

15. A non-transitory computer readable medium comprising code that, when executed, causes an apparatus to:

generate a predictor for a base layer block of a base layer of the video data based on one or more first pixel values in an enhancement layer of the video data;

approximate a reconstruction of the base layer block by approximating pixel values of the base layer block based on the predictor for the base layer block and a prediction residual for the base layer block, wherein the base layer comprises a first block in a first frame and a second block in the first frame, wherein the first block is predicted based on pixels neighboring the first block, wherein the pixels neighboring the first block are reconstructed based on a third block in a second frame different from the first frame, wherein the second block is predicted based on a fourth block in a third frame different from the first frame and the second frame, and wherein the base layer block is located at least partially within a portion of the first block and a portion of the second block; and

determine, based at least in part on the approximated pixel values of the base layer block, second pixel values of an enhancement layer block of the enhancement layer of the video data, wherein the enhancement layer block is located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer.

16. The medium of claim 15 , wherein the base layer block spans multiple prediction units of the base layer.

17. The medium of claim 15 , wherein the apparatus is configured to code video data using a single-loop decoding approach.

18. A video decoding device configured to use a single-loop decoding approach to code video data, the video decoding device comprising:

means for generating a predictor for a base layer block of a base layer of the video data based on one or more first pixel values in an enhancement layer of the video data;

means for approximating a reconstruction of the base layer block by approximating pixel values of the base layer block based on the predictor for the base layer block and a prediction residual for the base layer block, wherein the base layer comprises a first block in a first frame and a second block in the first frame, wherein the first block is predicted based on pixels neighboring the first block, wherein the pixels neighboring the first block are reconstructed based a third block in a second frame different from the first frame, wherein the second block is predicted based on a fourth block in a third frame different from the first frame and the second frame, and wherein the base layer block is located at least partially within a portion of the first block and a portion of the second block; and

means for determining, based at least in part on the approximated pixel values of the base layer block, second pixel values of the enhancement layer block of an enhancement layer of the video data, wherein the enhancement layer block is located at a position in the enhancement layer corresponding to a position of the base layer block in the base layer.

19. The video decoding device of claim 18 , wherein the base layer block spans multiple prediction units of the base layer.