Are 2 Mbps sufficient?
shobson0309 "at" colony.com
Fri Jan 14 09:23:00 2005
Rudi Verago [vlain] wrote:
>In my infrastructure (2Mbps) I have two video stream at 512 kbps
>1 Mbps). Other minor stream, audio, control and so on about 300 kbps. In the
>remaining bandwidth i have to send vnc stream for 4/5 client. Is it possible?
>I don't think so because vnc on peaks server and client get very slowly
>(impossible to use thanks to TCP). Configurations on client side about
>compression, jpeg quality and encoding offer poor improvment. Is it
>analysis? I have to change desktop sharing tool?
Changing tool will not necessarily help, and may make things worse.
If you have a certain number of pixels to transfer in a given time,
then it requires a certain bandwidth to do it. You have three options
to improve things :
1) reduce the amount of data to be transferred: smaller screen, less
bits/pixel, less frequent updates
2) increase the bandwidth
3) make more efficient use of the bandwidth: better compression,
multicast instead of unicastx4
Anyone know if it's possible to multicast to several clients with VNC
? If not, then changing tools to something that can multicast the
stream (ie one packet to all clients, instead of one packet per
client) will improve things (all else being equal of course).
NOTE: This is a throw-away email address which will reach me for as
long as it stays spam-free, remove date for real address.
Simon Hobson MA MIEE, Technology Specialist
Colony Gift Corporation Limited
Lindal in Furness, Ulverston, Cumbria, LA12 0LD
Tel 01229 461100, Fax 01229 461101
Registered in England No. 1499611
Regd. Office : 100 New Bridge Street, London, EC4V 6JA.