Resampling filters for scalable video coding with phase offset adjustment and signaling of same

A system for scalable video coding, comprising:

• a first coding layer comprising modules for coding video with a base resolution;
• a second coding layer comprising modules for coding video with an enhanced resolution having a higher resolution than a base resolution;
• an upsampling unit receiving input video signals from the first coding layer and providing an output signal to the second coding layer after an upsampling process, wherein the upsampling unit output signal enables more efficient coding in the second codling layer, wherein the upsampling unit comprises:
• a first module for selecting input samples from the input video signals in the first coding layer;
• a second module providing selection of a plurality of filters each having a different phase index for processing the selected input samples;
• and
• a third module including the plurality of filters, the third module for filtering the selected input samples with the selected filters, the third module providing the output signal from the upsampling unit,
• wherein the first coding layer is downsampled from the second coding layer,
• wherein a different phase offset is generated for each of the phase indices, wherein each of the different phase offsets is generated with a selected phase offset that is used to index a mapping table to an offset that can provide a phase shift in addition to phase rounding that is added to the selected phase offset to generate the different phase offset used to select an appropriate one of the plurality of filters used in the upsampling process to provide the output signal from the upsampling unit, and
• wherein signaling of the mapping table to obtain the added phase offset occurs at a picture parameter set (PPS) level.