Abstract
Scalability has become an important feature for video coding
algorithm desip for heterogeneous networks due to variable
bandwidth, variable wired and wireless network conditions
and variable terminal capabilities However, the best
video compression algorithms are based on temporal prediction
through motion compensation which do not lend
themselves naturally to a scalable framework More recently,
hybrid coding schemes have been introduced that
combine a base-layer motion-compensation coder with an
enhancement layer which offers fine-grain scalability through
an embedded or progressive coder Such a framework usually
results in some compression efficiency loss over the
best single layer motion compensated scheme Here, we
introduce a hybrid coding scheme which combines a baselayer
MC coder and a finely scalable enhancement layer
where the information from the base-layer is used to determine
the location of the high energy signal in the enhancement
layer. This coder provides better compression results
than embedded approaches which do not rely on base layer
information.
