METHODS AND SYSTEMS FOR PERFORMING COMBINED INTER AND INTRA PREDICTION

1 . A method for video processing, wherein a combined inter and intra prediction (CIIP) and luma mapping with chroma scaling (LMCS) are applied, the method comprises:

obtaining an inter prediction signal, an intra prediction signal, and an overlapped block motion compensation (OBMC) prediction signal;

obtaining an intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal; and

obtaining a final prediction signal by weighting the intermediate weighted prediction signal and a second prediction signal of intra prediction signal and the OBMC prediction signal;

wherein the intermediate weighted prediction signal and the second prediction signal are both in one of a mapped domain or an original domain.

2 . The method according to claim 1 , wherein obtaining the inter prediction signal, the intra prediction signal, and the OBMC prediction signal further comprises:

obtaining the inter prediction signal in an original domain;

obtaining the intra prediction signal in a mapped domain; and

obtaining the OBMC prediction signal in the original domain.

3 . The method according to claim 2 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

converting the inter prediction signal from the original domain to the mapped domain; and

obtaining the intermediate weighted prediction signal by weighting the converted inter prediction signal and the intra prediction signal in the mapped domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

converting the OBMC prediction signal from the original domain to the mapped domain; and

obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the mapped domain.

4 . The method according to claim 2 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

converting the inter prediction signal from the original domain to the mapped domain; and

obtaining the intermediate weighted prediction signal by weighting the converted inter prediction signal and the intra prediction signal in the mapped domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

converting the intermediate weighted prediction signal from the mapped domain to the original domain;

obtaining an intermediate final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the original domain; and

obtaining the final prediction signal by converting the intermediate final prediction signal from the original domain to the mapped domain.

5 . The method according to claim 2 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

converting the intra prediction signal from the mapped domain to the original domain; and

obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the converted intra prediction signal in the original domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

obtaining an intermediate final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the original domain; and

obtaining the final prediction signal by converting the intermediate final prediction signal from the original domain to the mapped domain.

6 . The method according to claim 2 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the OBMC prediction signal in the original domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

converting the intermediate weighted prediction signal from the original domain to the mapped domain; and

obtaining the final prediction signal by weighting the converted intermediate weighted prediction signal and the intra prediction signal in the mapped domain.

7 . The method according to claim 1 , wherein the inter prediction signal is obtained using an inter prediction process applied to a regular merge mode.

8 . The method according to claim 1 , wherein the OBMC prediction signal is obtained using a motion from neighboring blocks.

9 . An apparatus for performing video data processing, wherein a combined inter and intra prediction (CIIP) and luma mapping with chroma scaling (LMCS) are applied, the apparatus comprising:

a memory figured to store instructions; and

one or more processors configured to execute the instructions to cause the apparatus to perform:

obtaining an inter prediction signal, an intra prediction signal, and an overlapped block motion compensation (OBMC) prediction signal;

obtaining an intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal; and

obtaining a final prediction signal by weighting the intermediate weighted prediction signal and a second prediction signal of intra prediction signal and the OBMC prediction signal;

wherein the intermediate weighted prediction signal and the second prediction signal are both in one of a mapped domain or an original domain.

10 . The apparatus according to claim 9 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to perform:

obtaining the inter prediction signal in an original domain;

obtaining the intra prediction signal in a mapped domain; and

obtaining the OBMC prediction signal in the original domain.

11 . The apparatus according to claim 10 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to perform:

converting the inter prediction signal from the original domain to the mapped domain;

obtaining the intermediate weighted prediction signal by weighting the converted inter prediction signal and the intra prediction signal in the mapped domain;

converting the OBMC prediction signal from the original domain to the mapped domain; and

obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the mapped domain.

12 . The apparatus according to claim 10 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to perform:

converting the inter prediction signal from the original domain to the mapped domain; and

obtaining the intermediate weighted prediction signal by weighting the converted inter prediction signal and the intra prediction signal in the mapped domain;

converting the intermediate weighted prediction signal from the mapped domain to the original domain;

obtaining an intermediate final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the original domain; and

obtaining the final prediction signal by converting the intermediate final prediction signal from the original domain to the mapped domain.

13 . The apparatus according to claim 10 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to perform:

converting the intra prediction signal from the mapped domain to the original domain;

obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the converted intra prediction signal in the original domain;

obtaining an intermediate final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the original domain; and

obtaining the final prediction signal by converting the intermediate final prediction signal from the original domain to the mapped domain.

14 . The apparatus according to claim 10 , wherein the one or more processors are further configured to execute the instructions to cause the apparatus to perform:

obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the OBMC prediction signal in the original domain;

converting the intermediate weighted prediction signal from the original domain to the mapped domain; and

obtaining the final prediction signal by weighting the converted intermediate weighted prediction signal and the intra prediction signal in the mapped domain.

15 . The apparatus according to claim 9 , wherein the inter prediction signal is obtained using an inter prediction process applied to a regular merge mode.

16 . The apparatus according to claim 9 , wherein the OBMC prediction signal is obtained using a motion from neighboring blocks.

17 . A non-transitory computer readable storage medium storing a bitstream of a video for processing according to a method, wherein a combined inter and intra prediction (CIIP) and luma mapping with chroma scaling (LMCS) are applied on the video, and the method comprises:

obtaining an inter prediction signal, an intra prediction signal, and an overlapped block motion compensation (OBMC) prediction signal;

obtaining an intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal; and

obtaining a final prediction signal by weighting the intermediate weighted prediction signal and a second prediction signal of intra prediction signal and the OBMC prediction signal;

wherein the intermediate weighted prediction signal and the second prediction signal are both in one of a mapped domain or an original domain.

18 . The non-transitory computer readable storage medium according to claim 17 , wherein obtaining the inter prediction signal, the intra prediction signal, and the OBMC prediction signal further comprises:

obtaining the inter prediction signal in an original domain;

obtaining the intra prediction signal in a mapped domain; and

obtaining the OBMC prediction signal in the original domain.

19 . The non-transitory computer readable storage medium according to claim 18 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

converting the inter prediction signal from the original domain to the mapped domain; and

obtaining the intermediate weighted prediction signal by weighting the converted inter prediction signal and the intra prediction signal in the mapped domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

converting the intermediate weighted prediction signal from the mapped domain to the original domain;

obtaining an intermediate final prediction signal by weighting the intermediate weighted prediction signal and the OBMC prediction signal in the original domain; and

obtaining the final prediction signal by converting the intermediate final prediction signal from the original domain to the mapped domain.

20 . The non-transitory computer readable storage medium according to claim 18 , wherein obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and a first prediction signal of the intra prediction signal and the OBMC prediction signal comprises:

obtaining the intermediate weighted prediction signal by weighting the inter prediction signal and the OBMC prediction signal in the original domain; and

wherein obtaining the final prediction signal by weighting the intermediate weighted prediction signal and the second prediction signal of intra prediction signal and the OBMC prediction signal further comprises:

converting the intermediate weighted prediction signal from the original domain to the mapped domain; and

obtaining the final prediction signal by weighting the converted intermediate weighted prediction signal and the intra prediction signal in the mapped domain.