Video processing method and apparatus for signaling using palette mode

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.

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.