Patent ID: 7236520

Claim:
A motion encoder that robustly encodes temporal movement of video object planes (VOPs) for a first video frame in a sequence of video frames to be encoded, the motion encoder comprising: a previous VOP memory configured to store VOPs of a second video frame, where the second video frame corresponds to a video frame that is immediately prior to the first video frame; a previous VOP reconstruction circuit in communication with the previous VOP memory, where the previous VOP reconstruction circuit is configured to reconstruct video objects from the previous VOP memory; a first motion vector generator adapted to generate a standard motion vector from a first video object in the first video frame and a first reconstructed video object from the previous VOP reconstruction circuit; previous-previous VOP memory configured to store VOPs of at least a third video frame, where the third video frame corresponds to a video frame that is immediately prior to the second video frame; a previous-previous VOP reconstruction circuit in communication with the previous VOP memory, where the previous-previous VOP reconstruction circuit is configured to reconstruct video objects from the previous-previous VOP memory; and a second motion vector generator to generate a standard motion vector from the first video object in the first video frame and a second reconstructed video object from the previous-previous VOP reconstruction circuit.