Video processing method and apparatus for signaling using palette mode
The present disclosure provides systems and methods for signaling and using a palette mode in video processing. According to certain disclosed embodiments, an exemplary video processing method includes: receiving a first palette entry for palette coding a target coding unit (CU); determining whether the target CU is part of a single-tree slice; determining whether the target CU is coded with separate luma and chroma trees; and in response to the target CU being determined to be part of a single-tree slice and be coded with separate luma and chroma trees, decoding a first component of the target CU based on the first palette entry, and decoding a second component of the target CU based on a default palette entry.
1. A video processing method, comprising:
receiving a first palette entry for palette coding a target coding unit (CU);
determining whether the target CU is part of a single-tree slice;
determining whether the target CU is coded with separate luma and chroma trees; and
in response to the target CU being determined to be part of a single-tree slice and be coded with separate luma and chroma trees,
decoding a first component of the target CU based on the first palette entry, and
decoding a second component of the target CU based on a default palette entry.
2. The method of claim 1 , wherein receiving the first palette entry for palette coding the target CU comprises:
receiving a flag associated with a second palette entry; and
including the second palette entry in a palette predictor of the target CU based on the received flag.
3. The method of claim 2 , wherein a size of the palette predictor of the target CU is in a range of 0 to 63, inclusive.
4. The method of claim 1 , wherein receiving the first palette entry for palette coding the target CU comprises:
updating a palette predictor of the target CU based on the first palette entry.
5. The method of claim 1 , wherein determining whether the target CU is part of a single-tree slice comprises:
determining whether the target CU is part of a P slice or a B slice; or
determining whether the target CU is part of a single tree I slice.
6. The method of claim 5 , further comprising:
in response to the target CU being determined to be part of a P slice or a B slice or be part of a single tree I slice, decoding the first and second components of the target CU based on the first palette entry.
7. The method of claim 1 , wherein:
the first component is a luma component and the second component is a chroma component; or
the first component is a chroma component and the second component is a luma component.
8. The method of claim 1 , wherein a palette predictor of the target CU is not updated after the first component and the second component are decoded.
9. A video processing apparatus, comprising:
at least one memory for storing instructions; and
at least one processor configured to execute the instructions to cause the apparatus to perform:
receiving a first palette entry for palette coding a target coding unit (CU);
determining whether the target CU is part of a single-tree slice;
determining whether the target CU is coded with separate luma and chroma trees; and
in response to the target CU being determined to be part of a single-tree slice and be coded with separate luma and chroma trees,
decoding a first component of the target CU based on the first palette entry, and
decoding a second component of the target CU based on a default palette entry.
10. The apparatus of claim 9 , wherein the at least one processor is configured to execute the instructions to cause the apparatus to perform:
receiving a flag associated with a second palette entry; and
including the second palette entry in a palette predictor of the target CU based on the received flag.
11. The apparatus of claim 9 , wherein the at least one processor is configured to execute the instructions to cause the apparatus to perform:
determining whether the target CU is part of a P slice or a B slice; or
determining whether the target CU is part of a single tree I slice.
12. The apparatus of claim 11 , wherein the at least one processor is configured to execute the instructions to cause the apparatus to perform:
in response to the target CU being determined to be part of a P slice or a B slice or be part of a single tree I slice, decoding the first and second components of the target CU based on the first palette entry.
13. The apparatus of claim 9 , wherein a palette predictor of the target CU is not updated after the first component and the second component are decoded.
14. A non-transitory computer readable storage medium storing a set of instructions that are executable by one or more processing devices to cause a video processing apparatus to perform:
receiving a first palette entry for palette coding a target coding unit (CU);
determining whether the target CU is part of a single-tree slice;
determining whether the target CU is coded with separate luma and chroma trees; and
in response to the target CU being determined to be part of a single-tree slice and be coded with separate luma and chroma trees,
decoding a first component of the target CU based on the first palette entry, and
decoding a second component of the target CU based on a default palette entry.
15. The non-transitory computer readable storage medium of claim 14 , wherein the set of instructions are executable by the one or more processing devices to cause the video processing apparatus to perform:
receiving a flag associated with a second palette entry; and
including the second palette entry in a palette predictor of the target CU based on the received flag.
16. The non-transitory computer readable storage medium of claim 14 , wherein the set of instructions are executable by the one or more processing devices to cause the video processing apparatus to perform:
updating a palette predictor of the target CU based on the first palette entry.
17. The non-transitory computer readable storage medium of claim 14 , wherein the set of instructions are executable by the one or more processing devices to cause the video processing apparatus to perform:
determining whether the target CU is part of a P slice or a B slice; or
determining whether the target CU is part of a single tree I slice.
18. The non-transitory computer readable storage medium of claim 17 , wherein the set of instructions are executable by the one or more processing devices to cause the video processing apparatus to perform:
in response to the target CU being determined to be part of a P slice or a B slice or be part of a single tree I slice, decoding the first and second components of the target CU based on the first palette entry.
19. The non-transitory computer readable storage medium of claim 14 , wherein
the first component is a luma component and the second component is a chroma component; or
the first component is a chroma component and the second component is a luma component.
20. The non-transitory computer readable storage medium of claim 14 , wherein a palette predictor of the target CU is not updated after the first component and the second component are decoded.