Question

Remote Desktop Bandwidth Requirement By Resolution/Color Depth

Asked by: AndyH79

http://www.experts-exchange.com/Networking/Broadband/Q_23197301.html
lists the bandwith requirements for 800x600 @ 265 colors as 26.4k and 1024x768 @ 16 bit color as 24.6k.

I'm looking for the value for 1900x1200 @ 24bit.  I've calculated the number of bits per setting:
800x600x16 = 7,680,000bits
1024x768x8 = 6,291,456bits
1900x1200x24 = 54,720,000bits

This puts the requirement for 1900x1200x24 at 7.125 times the 800x600x16 and approx 8.70 times 1024x768x8 or between 188.1k-214k upload to support the user.

Am I calculating these values correctly? If so why is there a difference between the two lower resolutions? I would have expected a linear progression in the bandwidth requirements.

Is there a matrix available for the different resolutions online?  Everyone seems concerned with the lower resolutions. Unfortunately the software I wrote to run on my laptop  is set up to run on the 1900x1200 and a rework of the code isn't cost effective.

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Asked On
2009-11-03 at 19:20:06ID24869676
Tags

Terminal Server

,

RDP

,

Remote Desktop

,

Bandwith

,

Resolution

Topics

Broadband Internet

,

Remote Desktop/Terminal Services

Participating Experts
1
Points
500
Comments
2

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Answers

 

by: Frosty555Posted on 2009-11-03 at 21:30:42ID: 25736671

Keep in mind that there is other data that must be transferred via remote desktop's RDP protocol, and it's not just a screenshot at regular intervals.  There is a lot of intelligent optimizing and compressing going on in the RDP protocol. So you may be able to view a few simple explorer windows fine on a dial-up connection, but viewing a fullscreen youtube video will take far more bandwidth regardless of your resolution or bitrate.

Microsoft published a whitepaper that gives some specifics here:

http://download.microsoft.com/download/4/d/9/4d9ae285-3431-4335-a86e-969e7a146d1b/RDP_Performance_WhitePaper.docx

HTML Version:
http://cc.bingj.com/cache.aspx?q=rdp+%226+1%22+performance+white+paper&d=261050663141&mkt=en-CA&setlang=en-CA&w=4d4d6074,5a677a17

 

by: AndyH79Posted on 2009-11-09 at 10:55:50ID: 31649820

Thanks for the help on this issue.  The document was an interesting read. I hooked up a port bandwidth monitor and it's taking about 160kbps for 1900x1200 @ 24bit. It did spike occasionally up to 300kbps or so infrequently.

20120131-EE-VQP-002

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