Frame - Free
نویسندگان
چکیده
Current digital video representations emphasize compression eeciency, lacking some of the exibility required for interactive manipulation of digital bitstreams. In this work, we present a video representation which can encompass both space and time, providing a temporally coherent description of video sequences. The video sequence is segmented into its component objects, and the trajectory of each object throughout the sequence is described paramet-rically, according to a spatiotemporal motion model. Since the motion model is a continuous function of time, the video representation becomes frame-rate independent and temporal resolution a user-deenable parameter. I.e. the traditional sequence of frames, with temporal structure hard-coded into the bitstream at the time of production, is replaced by a collection of scene snapshots assembled on the y by the decoder. This enables random access and temporal scalability, the major building blocks for interactivity.
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