V. Parthasarathy et al., DESIGN OF A TRANSPORT CODING SCHEME FOR HIGH-QUALITY VIDEO OVER ATM NETWORKS, IEEE transactions on circuits and systems for video technology, 7(2), 1997, pp. 358-376
In this paper, we explore the design of forward error control (FEC)-ba
sed error concealment schemes for digital video transmission on ATM ne
tworks. III particular, me study the impact of code selection on the o
verall performance and provide a judicious code selection strategy, Th
e use of FEC provides an active and powerful means of recovery from pa
cket loss which is particularly useful when the encoded video material
has high motion and scene changes, The best technique for applying FE
C is tee throttle the source coding rate so that the overall transmiss
ion rate after EEC application equals the original unprotected rate, H
owever, the resulting performance then depends on the particular code
selected, A well-chosen code provides good protection while allowing l
ittle sacrifice in quality and at the same time satisfies specified de
lay constraints, Our results show that a single code is generally insu
fficient to provide good performance under all operating conditions, H
owever, a small group of codes can be preselected, using the efficient
code-selection strategy described here, which will provide efficient
and robust performance over a wide range of channel conditions, We sho
w that this simple code selection strategy is sufficient to select cod
es judiciously for a nide range of operating conditions and constraint
s, Employing this selection strategy, we demonstrate that moderate len
gth codes are sufficient to provide good performance while meeting the
imposed delay constraint.