Patent ID: 7227894
Filing Date: 2007-06-05
Classification: H04N

Abstract:
1. A fine granularity scalable encoder comprising: a base-layer encoding block including a coarse prediction loop and a base-layer mode selector, said coarse prediction loop having a coarse prediction output; an enhancement-layer encoding block including a fine prediction loop and an enhancement-layer mode selector, said fine prediction loop having a fine prediction output; and a mode decision unit for adaptively controlling said enhancement-layer and base-layer mode selectors; wherein said encoder operates in a mix prediction mode when said base-layer mode selector is switched to select said coarse prediction output and said enhancement-layer mode selector is switched to select said fine prediction output, said encoder operates in an all-coarse prediction mode when both said base-layer mode selector and said enhancement-layer mode selector are switched to select said coarse prediction output, and said encoder operates in an all-fine prediction mode when both said base-layer mode selector and said enhancement-layer mode selector are switched to select said fine prediction output.