Mode-dependent joint component transform

1. A method for coding video data, executable by a processor, comprising:

obtaining one or more residual components corresponding to one or more components of video data;

performing a joint component secondary transformation (JCST) operation on the one or more residual components including performing the JCST operation on first block using a first JCST kernel and the JCST operation on a second on a second block using a second JCST kernel different from the first JCST kernel;

performing quantization on a result of the JCST operation;

performing entropy coding on a result of the quantization; and

encoding the video data based on a result of the entropy-coding to generate an encoded video bitstream corresponding to the video data.

2. The method of claim 1 , wherein the first JCST kernel or the second JCST kernel is selected based on a prediction mode corresponding to the video data.

3. The method of claim 2 , wherein the first JCST kernel or the second JCST kernel is applied based on an intra prediction mode associated with the video data.

4. The method of claim 3 , wherein the intra prediction mode comprises one or more from among DC, SMOOTH_H, SMOOTH_V, directional modes, Paeth predictor, and filtering modes.

5. The method of claim 3 , wherein the first JCST kernel or the second JCST kernel is applied based on a nominal intra prediction modes.

6. The method of claim 3 , wherein JCST is disabled based on the intra prediction mode.

7. The method of claim 6 , wherein the intra prediction mode comprises one or more from among chroma-from-luma mode and Paeth Predictor.

8. The method of claim 2 , wherein the first JCST kernel is applied for an intra prediction mode and the second JCST kernel is applied for an inter prediction mode.

9. The method of claim 2 , wherein the first JCST kernel or the second JCST kernel is applied based on an Intra Block Copy mode.

10. The method of claim 2 , wherein the first JCST kernel or the second JCST kernel is applied based on a Palette mode.

11. The method of claim 2 , wherein the first JCST kernel or the second JCST kernel is applied based on different inter prediction modes.

12. The method of claim 2 , wherein the first JCST kernal or the second JCST kernal is applied based on motion information.

13. The method of claim 12 , wherein the first JCST kernel or the second JCST kernel is dependent on whether a motion vector predictor comes from a top, a left, or a temporal motion vector predictor candidate.

14. The method of claim 12 , wherein the first JCST kernel or the second JCST kernel is dependent on a magnitude of a motion vector.

15. The method of claim 12 , wherein the first JCST kernel or the second JCST kernel is dependent on a direction of a motion vector.

16. The method of claim 1 , wherein the first JCST kernel or the second JCST kernel is dependent on a primary transform type selected for a current block associated with the video data.

17. The method of claim 16 , wherein the first JCST kernel or the second JCST kernel is applied based on a primary transform being applied on color components associated with the video data applying JCST.

18. The method of claim 1 , wherein the first JCST kernel or the second JCST kernel is dependent on a secondary transform kernel selected for a current block associated with the video data.

19. A computer system for coding video data, the computer system comprising:

one or more computer-readable non-transitory storage media configured to store computer program code; and

one or more computer processors configured to access said computer program code and operate as instructed by said computer program code, said computer program code including:

obtaining one or more residual components corresponding to one or more components of video data;

first performing code configured to cause the one or more computer processors to perform a joint component secondary transformation (JCST) on the one or more residual components including performing the JCST operation on first block using a first JCST kernel and the JCST operation on a second block using a second JCST kernel different from the first JCST kernel;

second performing code configured to cause the one or more computer processors to perform quantization on a result of the JC ST operation;

third performing code configured to cause the one or more computer processors to perform entropy coding on a result of the quantization; and

encoding code configured to cause the one or more computer processors to encode the video data based on a result of the entropy-coding to generate an encoded video bitstream corresponding to the video data.

20. A non-transitory computer readable medium having stored thereon a computer program for coding video data, the computer program configured to cause one or more computer processors to:

obtain one or more residual components corresponding to one or more components of video data;

perform a joint component secondary transformation (JCST) operation on the one or more residual components including performing the JCST operation on first block using a first JCST kernel and the JCST operation on a second block using a second JCST kernel different from the first JCST kernel;

perform quantization on a result of the JCST operation;

perform entropy coding on a result of the quantization; and

encode the video data based on a result of the entropy-coding to generate an encoded video bitstream corresponding to the video data.