Cisco has released a new design guide named ” Real Time Traffic over Wireless LAN-RToWLAN” to replace the existing enterprise Mobility 7.3 Design Guide. Here is a snapshot of the RToWLAN solution architecture describe in this guide.
I think it is based on 7.5.x software release of Cisco controllers. This should be a good reference document if you are deploying Real-Time applications over wireless including voice/video.
Correction:
This document will replace the existing Voice over Wireless LAN Design guide 4.1 & not the 7.3 Mobility Design Guide as I have listed above (Thanks for Vic Nunes from Cisco for highlighting this)
mrn-cciew 
Rasika, thanks for finding this guide, I completely missed it. It’s intention is to replace the VoWLAN 4.1 Design Guide of old.
Thanks Vic for highlighting this, I have posted a correction note in the above.
Regards
Rasika