Yes. Blank areas are essentially null. So are repeated frames. TTFN, Mark dan.grimes@xxxxxxxx wrote: >So when you say a good entropy encoder doesn't waste bits, you are saying >that the extra frames or black sides really don't take many bits? This >would be B frames basicly being nul? and the black areas to each side >being virtually nul? > >Dan > > > > > > Mark Schubin > > <tvmark@earthlink To: opendtv@xxxxxxxxxxxxx > > .net> cc: > > Sent by: Subject: [opendtv] Re: Format > Independence > opendtv-bounce@fr > > eelists.org > > > > > > 11/09/2005 06:35 > > PM > > Please respond to > > opendtv > > > > > > > > > >The problem is on the consumer end. Some early receiver/decoders froze >when there were format changes. Rest assured that a good entropy coder >doesn't waste bits on what isn't really there. > >TTFN, >Mark > > >dan.grimes@xxxxxxxx wrote: > > > >>In response to some of the discussion about formats, I have another >>question. Why do broadcasters put out a fixed format stream when at the >>production level the format is different. For instance, if Fox puts out >>720@60P all the time, and the original production content is 24P, why >> >> >would > > >>the broadcaster waste bits by sending several frames of the same picture? >>Why not send out 720@24P and use the 19Mb/s to send a less compressed >>picture? Or how about when a 640x480@30i is sent out 720@60P? Is it a >>problem with the master control switcher only switching one format, or the >>server, or is the problem on the customer's end (like the monitor won't >>naturally switch)? Is it simply easier that way? I would think a lot of >>efficiency could be gained there. >> >>Dan >> >> >>---------------------------------------------------------------------- >>You can UNSUBSCRIBE from the OpenDTV list in two ways: >> >>- Using the UNSUBSCRIBE command in your user configuration settings at >> >> >FreeLists.org > > >>- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word >> >> >unsubscribe in the subject line. > > >> >> >> >> >> > > >---------------------------------------------------------------------- >You can UNSUBSCRIBE from the OpenDTV list in two ways: > >- Using the UNSUBSCRIBE command in your user configuration settings at >FreeLists.org > >- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word >unsubscribe in the subject line. > > > > > >-- Binary/unsupported file stripped by Ecartis -- >-- Type: image/gif >-- File: graycol.gif > > >-- Binary/unsupported file stripped by Ecartis -- >-- Type: image/gif >-- File: ecblank.gif > > >-- Binary/unsupported file stripped by Ecartis -- >-- Type: image/gif >-- File: pic15255.gif > > > > >---------------------------------------------------------------------- >You can UNSUBSCRIBE from the OpenDTV list in two ways: > >- Using the UNSUBSCRIBE command in your user configuration settings at >FreeLists.org > >- By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word >unsubscribe in the subject line. > > > > > ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.