Mosaicing videos to stream over multiple independent channels
Chris Boehnen, Allison Regier, Deborah Thomas, Surendar Chandra and Patrick Flynn
University of Notre Dame
Abstract
Streaming high
fidelity multimedia objects requires large amounts of network bandwidth
resources. Sometimes these resources are achieved by aggregating a number of
independent and lower capacity network channels. Network level aggregation
schemes can stream the single video across all the network links. However,
splitting multi-layer encoded video streams are not resilient to network
failures on individual links because enhancement layers are not independent and
depend on the availability of base layers. In this paper, we investigate several
multiple description coding mechanisms that split the stream into multiple
independent sub-streams. Our mechanisms attempt to retain the spatial and
temporal redundancy inherent in the original stream in order to achieve good
compression efficiency. We examine the impact of our approach on changes in peak
transmission requirements, overall transmission size and stream quality. We show
that the sub-streams are able to sustain substantial data loss while still
providing a viewable stream. We also show the object size overhead for the
various mechanisms.
Keywords : Multiple Description Coding