VbSS uses different underlying protocols to deliver a faster streaming experience. The service uses the User Datagram Protocol, which is more suited to multi-user conversations.
The protocol has the knock on effect of speeding up one-to-one conversations. It also improves startup times, viewing quality and reliability.
The previous Remote Desktop Protocol will still be available, and can be used as a backup.
Microsoft has provided some statistics on how much difference the change will make:
- “Make screen-sharing (up to 5%) more reliable compared to RDP alone.
- Make the session setup and video experience faster compared to RDP alone (setup in half the time, with a 6:1 improvement in frames-per-second).
- Works much better than RDP in low bandwidth conditions, even when sharing high motion content, such as 3-D graphics.”
Skype for Business Version 6.7 Release Notes
The update also comes with other minor upgrades to the UI and performance. Full changelog below:
“With this update, we are bringing Video-based Screen Sharing (VbSS) to your mobile devices. A faster and more reliable way of viewing content in a meeting, VbSS is a great improvement over the traditional approach of content sharing.?In addition, we also have some design and performance improvements.”
It's not yet clear what the design improvements are, but they'll likely reveal themselves as users on the previous version begin to notice changes.
There are some downsides to RDP, however, namely a decreased fidelity. Video will be less crisp, traded for an overall more responsive experience. However, according to Microsoft this “will not be readily visible to users.”