| 主权项 |
1. A method for predictive Intra coding of a non-square block, wherein a corresponding square block is Intra coded using mode-dependent coefficient scanning (MDCS), wherein Intra modes for the corresponding square block are divided into multiple groups comprising a first angular group and a second angular group, and wherein the corresponding square block is processed using first coefficient scanning if the Intra mode for the square block belongs to the first angular group and using second coefficient scanning if the Intra mode for the square block belongs to the second angular group, the method comprising:
determining modified MDCS for the non-square block based on the MDCS, wherein mapped Intra modes for the non-square block are derived by mapping the Intra modes for the square block to the mapped Intra modes for the non-square block, the mapped Intra modes are divided into multiple modified groups comprising a first modified angular group and a second modified angular group, the modified MDCS modifies a number of the mapped Intra modes in the first modified angular group or the second modified angular group by comparing a first angle spanned by the mapped Intra modes in the first modified angular group or the second modified angular group with a second angle spanned by the Intra modes in the first angular group or the second angular group respectively; receiving input data associated with a current non-square block; and processing the current non-square block according to the modified MDCS, wherein the current non-square block is Intra coded using the first coefficient scanning if the mapped Intra mode for the current non-square block belongs to the first modified angular group, and the current non-square block is Intra coded using the second coefficient scanning if the mapped Intra mode for the current non-square block belongs to the second modified angular group. |
