Method of Video Coding Using Prediction based on Intra Picture Block Copy

摘要

A method of signaling of coding modes including an IntraBC mode (Intra-block copy mode) to improve the coding efficiency is disclosed. In one embodiment, the partition mode associated with IntraBC mode and the corresponding partition mode for Inter mode use the same binarization process and the same context modelling. In another embodiment, the displacement vector of IntraBC prediction for the chroma block is derived from the displacement vectors of the corresponding luma block. In yet another embodiment, a non-square PU is partitioned into multiple TUs (transform units) and IntraBC prediction is performed TU by TU.

主权项

1. A method of signaling of coding mode including an IntraBC mode (Intra-block copy mode) for a picture, wherein the picture is divided into multiple coding units, the method comprising:
receiving input data associated with a current coding unit in a current picture, wherein the current coding unit is coded using a prediction mode selected from a prediction mode group including the IntraBC mode; if the IntraBC mode is selected for the current coding unit: encoding or decoding a partition mode associated with the IntraBC mode using a same binarization process for a corresponding partition mode as when the current coding unit is coded using an Inter mode; and encoding or decoding a binary codeword for the partition mode from the binarization process using CABAC (context-adaptive binary arithmetic coding) based on a same context formation process for a corresponding binary codeword from the same binarization process as when the current coding unit is coded using the Inter mode.