Method and Apparatus for Palette Predictor Initialization for Palette Coding in Video and Image Compression

摘要

A method and apparatus of palette predictor initialization for a coding system using palette coding are disclosed. A SPS predictor flag indicating whether SPS palette predictor values are present in a current SPS and a PPS predictor flag indicating whether SPS palette predictor values are present in a current PPS are used. According to the values of the SPS predictor flag and the PPS predictor flag, the current palette predictor array having a current predictor size for blocks in a picture corresponding to the current PPS is signaled at an encoder side or derived at a decoder side based on the PPS palette predictor values, the SPS palette predictor values or both.