Sure. The end result of four multiplexed VBR streams into one creates one CBR stream. Yes that is one case of VBR for broadcasting. What I meant is transmission of a single HDTV stream that occupies complete channel for maximum picture quality. Mike Tsinberg http://www.keydigital.com -----Original Message----- From: John Shutt [mailto:shuttj@xxxxxxxxx] Sent: Tuesday, December 8, 2009 12:07 PM To: opendtv@xxxxxxxxxxxxx Subject: [opendtv] Re: Time to give up on 1080i for football This is going to come as quite a shock to our four Tandberg encoders that are using VBR to statistically multiplex four streams into one ATSC transmission. I'm not sure how to break the news to them... John ----- Original Message ----- From:Mike Tsinberg To:opendtv@xxxxxxxxxxxxx The broadcasting such as ATSC can only be done in CBR.