Methods and systems for chroma residual data prediction

1. A method, comprising:

determining if a neighboring block of a selected block of video data was encoded based on an inter-prediction coding scheme;

responsive to determining that the neighboring block was encoded based on the inter-prediction coding scheme:

determining if a first motion vector associated with the neighboring block correlates with a second motion vector associated with the selected block;

responsive to determining that the first motion vector correlates with the second motion vector:

computing a coefficient correlating reconstructed luma residual samples and corresponding reconstructed chroma residual samples for the neighboring block;

generating predicted chroma residual samples for the selected block based on corresponding reconstructed luma residual samples and the computed coefficient; and

selecting a chroma residual prediction mode or a chroma prediction mode based on a cost associated with the predicted chroma residual samples.

2. The method of claim 1 , wherein the selected block is configured to be encoded based on an inter-prediction coding scheme.

3. The method of claim 1 , further comprising:

subsampling the reconstructed luma residual samples prior to computing the coefficient if a number of reconstructed luma residual samples is greater than a number of the reconstructed chroma residual samples.

4. The method of claim 1 , further comprising:

subsampling the reconstructed luma residual samples prior to generating the predicted chroma residual samples if a number of reconstructed luma residual samples is greater than a number of chroma residual samples, wherein the subsampling is performed based on a pre-defined chroma sub sampling metric.

5. The method of claim 1 , wherein the coefficient corresponds to a linear model coefficient obtained based on least mean square error metric.

6. The method of claim 1 , wherein the predicted chroma residual samples are generated for one of C b and C r chroma components corresponding to the neighboring block, and, wherein the predicted chroma residual samples are generated for remaining of the C b and C r chroma components based on the reconstructed luma residual samples and the predicted chroma residual samples generated for one of the C b and C r chroma components.

7. A system, comprising:

a processing module configured to:

compute a coefficient correlating reconstructed luma residual samples and corresponding reconstructed chroma residual samples for a neighboring block of a selected block of video data; and

determining if a first motion vector associated with the neighboring block correlates with a second motion vector associated with the selected block; and

a coding module communicatively associated with the processing module and configured to:

determine if the neighboring block was encoded based on an inter-prediction coding scheme;

responsive to determining that the neighboring block was encoded based on an inter-prediction coding scheme and determining that the first motion vector correlates with the second motion vector:

generate predicted chroma residual samples for encoding the selected block based on corresponding reconstructed luma residual samples and the coefficient;

and

selecting a chroma residual prediction mode or a chroma prediction mode based on a cost associated with the predicted chroma residual samples.

8. The system of claim 7 , wherein the coding module is further configured to:

perform a subsampling of the reconstructed luma residual samples corresponding to the block of video data prior to generating the predicted chroma residual samples if a number of reconstructed luma residual samples is greater than a number of chroma residual samples, wherein the subsampling is performed based on a pre-defined chroma subsampling metric.

9. The system of claim 7 , wherein the coefficient corresponds to a linear model coefficient obtained based on least mean square error metric.

10. The system of claim 7 , wherein the system is one of a high efficiency video coding (HEVC) based decoder, a moving picture experts group (MPEG)-4 based decoder, a HEVC based encoder and a MPEG-4 based encoder.

11. A non-transitory computer-readable medium storing a set of instructions that when executed cause a computer to perform a method comprising:

determining if a neighboring block of a selected block of video data was encoded based on an inter-prediction coding scheme;

responsive to the determining that the neighboring block was encoded based on an inter-prediction coding scheme:

determining if a first motion vector associated with the neighboring block correlates with a second motion vector associated with the selected block;

responsive to determining that the first motion vector correlates with the second motion vector:

computing at least one coefficient correlating reconstructed luma residual samples and corresponding reconstructed chroma residual samples for the neighboring block;

generating predicted chroma residual samples for encoding the selected block based on corresponding reconstructed luma residual samples and the at least one coefficient;

and

selecting a chroma residual prediction mode or a chroma prediction mode based on a cost associated with chroma residual samples.

12. The computer-readable medium of claim 11 , wherein the method further comprises:

subsampling the reconstructed luma residual samples prior to generating the predicted chroma residual samples if a number of reconstructed luma residual samples is greater than a number of chroma residual samples, wherein the subsampling is performed based on a pre-defined chroma subsampling metric.