user information passed to VC synthesizer:
	list of participants
		participant info:
			IP address/hostname
			application/supported audio video formats
			available bandwidth(upstream and downstream)
	membership permissions(invitation only; any join; private/public)		additional application components needed (FTP/chat/whiteboard)
	
recipes

if (participant[x].vidFormat != participant[y].vidFormat)
	-> search for transcoder along path || nearest path

if participant[*].app = realplayer -> request RealServer from VC service

if (IP multicast/end system multicase not supported) -> unicast 
	-> max downstream bw = sum(participate[x].txmtdatarate)

if (VC apps also include FTP and text chat and whiteboard) 
	-> define filters and flows (i.e. load balance? lower priority on FTP)



interface from VC synthesizer to services
synthesizer sends to basic video conference service:
	membership permissions
	supported audio video formats of participants
	video conference service returns:
		servers available 		

synthesizer sends to multicast service:
	list of participant IP addresses + server IP addresses

	multicast service returns:
		overlay topology or NULL if multicast not possible

synthesizer sends to transcoder service:
	topology, participants' video/audio formats supported
	transcoder service returns:
		transcoders info: location and capabilities

synthesizer sends to diffserv service:
	QoS requirements for all the flows

	diffserv service returns:
		flow ID's
		

synthesizer returns to user:
	appropriate handles(i.e. group ID, data entry points)