Patent ID: 6057884
Filing Date: 2000-05-02
Classification: G06T,H04N

Abstract:
A method for scaling an input video sequence comprising video object planes (VOPs) for communication in a corresponding base layer and enhancement layer, said VOPs in said input video sequence having an associated spatial resolution and temporal resolution, comprising the steps of:downsampling pixel data of a first particular one of said VOPs of said input video sequence to provide a first base layer VOP having a reduced spatial resolution;upsampling pixel data of at least a portion of said first base layer VOP to provide a first upsampled VOP in said enhancement layer;differentially encoding said first upsampled VOP using said first particular one of said VOPs of said input video sequence for communication in said enhancement layer at a temporal position corresponding to said first base layer VOP;downsampling pixel data of a second particular one of said VOPs of said input video sequence to provide a second base layer VOP having a reduced spatial resolution;upsampling pixel data of at least a portion of said second base layer VOP to provide a second upsampled VOP in said enhancement layer which corresponds to said first upsampled VOP;using at least one of said first and second base layer VOPs to predict an intermediate VOP corresponding to said first and second upsampled VOPs; andencoding said intermediate VOP for communication in said enhancement layer at a temporal position which is intermediate to that of said first and second upsampled VOPs.