Method of pulse-code modulation and palette coding for video coding

摘要

Methods for coding a block of video data using palette coding in a video coding are disclosed. According to one embodiment, the palette transpose flag is signaled conditionally depending on the maximum index value or the palette size. If the maximum index value or the palette size is equal to or greater than a threshold size, the palette transpose flag is signaled at an encoder side or parsed at a decoder side. Otherwise, the palette transpose flag is not signaled or parsed. In another embodiment, the last palette and the last palette size are updated by the current palette with the current palette size conditionally. For example, updating the last palette and the last palette size by the current palette with the current palette size is skipped if the current coding unit is coded using a pulse-coded modulation (PCM) mode or the current palette size is zero.

主权项

1. A method of coding a block of video data using palette coding for a video coding system, the method comprising:
receiving input data associated with a current coding unit; determining a maximum index value or a palette size for a current palette; if the maximum index value or the palette size is equal to or greater than a threshold size, signaling a palette transpose flag at an encoder side or parsing the palette transpose flag at a decoder side; and encoding or decoding the current coding unit using palette coding according to the current palette, wherein whether the current palette is transposed is indicated by the palette transpose flag.