Mode Dependent Coding Tools for Video Coding

This paper provides an overview of the mode dependent coding tools in the development of video coding technology. In video coding, the prediction mode is closely related with the local image statistical characteristics. For instance, the angular intra mode contains the oriented structure information and the interpartition mode can reveal the local texture properties. Characterized by this fact, the prediction mode can be employed to facilitate the further encoding process, such as transform and coefficient coding. Recently, many mode dependent coding tools were proposed to provide more flexibility and thereby improve the compression performance. In general, these coding tools can be classified into three categories: mode dependent transform, residual reorder before transformation and coefficient scan after transformation. In this paper, these advanced coding algorithms are detailed and experiments are conducted to demonstrate their superior compression performance.