techniques for efficient streaming of Layered video in Heterogeneous client environments

by Raghuveer A. et al.

This paper combine layered coding and transcoding together in order to support universal multimedia acccess (UMA). The purpose for that combination is to use them in complementary roles.
for example, layered coding is not flexible enough and some extra bandwidth is wasted due to the coding and packetization overhead. In addition, no real layered coding system is deploied. Transcoding is computing intensive.

A new architecture that could build on the strengths of both layered coding and transcoding. eable efficient transport of layered video in three ways: (1) use transcoding. (2)Use transcoding to complement layered coding. (3) reduce layering overhead.

Limitations:
(1)The idea is new. but is it necessary to combine layered coding with transcoding? For VoD server, storage is not a big problem.
(2)The transcoding cost from version x to version y seems simple.