Research Goals and Related Work
n Research Goals
identify promising image transcoding operations, based on image
classification
predict achievable bandwidth reductions
good adaptive algorithms that meet user constraints, take device
limitations and link characteristics into account
n adaptive over what timescale, how fast, interactions with link layer
n Related Work
image transcoding: GloMop, InfoPyramid, Mowser, Mowgli
n all introduce notion of a proxy
n range of transcoding operations limited/not dynamically selected
multiple versions provided by server:
n WAP: use markup language and protocol stack specific to cellphones,
completely new infrastructure
n RFC 2295/2296: transparent content negotiation and variant selection,
leaves it to server to provide range of formats suited for huge number
of clients