RE-SAMPLING WITH PHASE OFFSET ADJUSTMENT FOR LUMA AND CHROMA IN SCALABLE VIDEO CODING

摘要

A sampling filter process is provided for scalable video coding. The process provides for resampling using video data obtained from an encoder or decoder process of a base layer (BL) in a multi-layer system using adaptive phase shifting to improve quality in Scalable High efficiency Video Coding (SHVC). In order to compensate for phase offsets introduced by downsampling an appropriate phase offset adjustment is made for upsampling in SHVC with an appropriate offset included for proper luma/chroma color space positions. In one approach the luma/chroma phase offset is specified and a filter is selected to apply the appropriate phase change. In another approach, an adaptive filter is signaled with its phase offset adjusted to account for the luma/chroma offset.