  We study and compare three coded schemes for single-server wireless broadcast
of multiple description coded content to heterogeneous users. The users (sink
nodes) demand different number of descriptions over links with different packet
loss rates. The three coded schemes are based on the LT codes, growth codes,
and randomized chunked codes. The schemes are compared on the basis of the
total number of transmissions required to deliver the demands of all users,
which we refer to as the server (source) delivery time. We design the degree
distributions of LT codes by solving suitably defined linear optimization
problems, and numerically characterize the achievable delivery time for
different coding schemes. We find that including a systematic phase (uncoded
transmission) is significantly beneficial for scenarios with low demands, and
that coding is necessary for efficiently delivering high demands. Different
demand and error rate scenarios may require very different coding schemes.
Growth codes and chunked codes do not perform as well as optimized LT codes in
the heterogeneous communication scenario.
