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Low BitRate Video Coding with Implicit MultiScale Segmentation

Summary: 1
Low Bit­Rate Video Coding with Implicit
Multi­Scale Segmentation
Seung Chul Yoon, Krishna Ratakonda, and Narendra Ahuja, Fellow, IEEE
Abstract--- In this paper we report on our efforts toward
developing a multi­scale segmentation based video compres­
sion algorithm aimed at very low bit­rate applications such
as video tele­conferencing and video phones. We introduce
novel techniques for multi­scale segmentation based motion
compensation and residual coding. Our region based for­
ward motion compensation strategy (in terms of direction
of motion vector, which is from the previous frame to the
current frame) regulates the size and number of regions
used, by pruning a multi­scale segmentation of video frames.
Since regions used for motion compensation are obtained by
segmenting the previously decoded frame, the shape of the
regions need not be transmitted to the decoder. Further­
more, our hierarchical motion compensation strategy refines
an initial region level, coarse motion field to obtain a dense
motion field which provides pixel level motion vectors. The


Source: Ahuja, Narendra - Department of Electrical and Computer Engineering, University of Illinois at Urbana-Champaign


Collections: Computer Technologies and Information Sciences; Engineering