Layered multiple description coding

Multiple description codes address the problem of unreliable

channels by means of independent descriptions, while

layered codes address the problems of heterogeneous client

bandwidths and dynamic network congestion by means of

sequences of layers. With the goal of achieving both robustness

to unreliable channels and adaptivity to client bandwidth

heterogeneity and network congestion, we explore

constructions for layered multiple description codes, where

base layer descriptions can be transmitted to low bandwidth

clients, while both base and enhancement layer descriptions

can be transmitted to high bandwidth clients. The low bandwidth

client quality is an increasing function of the number

of base layer descriptions received, while the high bandwidth

client quality is a bivariate increasing function of both

the number of base layer descriptions and the number of

enhancement-layer descriptions received. By optimizing the

base layer descriptions for the low bandwidth client, in our

construction, the high bandwidth client pays a penalty of

1.4 dB relative to a non-layered multiple description code

optimized to the high bandwidth client.

PDF file

In  Packet Video Workshop

Publisher  Institute of Electrical and Electronics Engineers, Inc.
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