ADAPTIVE SAMPLING FILTER PROCESS FOR SCALABLE VIDEO CODING

摘要

A sampling filter process is provided for scalable video coding. The process provides for re-sampling 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. Examples of a multi-layer encoder or decoder process are MPEG-4 Advanced Video Coding (AVC) and High Efficiency Video Coding (HEVC). The re-sampled BL data can be used in encoding or decoding of a corresponding video data of higher layers in a scalable video coding system. For example, the re-sampled or upsampled data can be used as a basis for prediction of the higher resolution video data.

主权项

1. 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 the base resolution; an upsampling unit receiving sampling 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 coding layer, wherein the upsampling unit comprises:
a first module for selecting input samples of the video signal in the first coding layer;a second module providing selection of a plurality of filters for processing the selected input samples; anda 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, and wherein phase offset generated in the downsampling is accounted for in the filters used in the upsampling process with an adaptive phase shift to provide the output signal from the upsampling unit.