I am currently trying to get my live-application on Wowza Streaming Engine HbbTV-Ready. I know that there are a lot of TVs which are not (yet) fully DASH-ready or compliant.
Some TVs are not playing back the adaptive playlist, but they do let me stream a single quality. After a little bit of reading and tweaking, i found out that with the mpegdashEnableHbbtvLiveProfile-Switch it adds "urn:mpeg:dashrofile:isoff-live:2011" to my playlist. After reading a bit further, i found out that some TVs seem to require this string in the profile-attribute: urn:hbbtv:dashrofile:isoff-live:2012,urn:mpeg:dashrofile:isoff-live:2011.
Is there a reason that you only include the 2011 profile-attribute to the MPD? If no, do you plan to add the 2012 in the future?