On Sun, 27 Jul 2003, Richard Walker wrote:
> 
> On Friday, July 25, 2003, at 02:00  pm, Andrew de Quincey wrote:
> 
> > On Friday 25 July 2003 06:36, Robert Schlabbach wrote:
> >>
> >> The BBC method is called AFD and described here:
> >>
> >> http://www.dtg.org.uk/publications/books/afd.pdf
> >>
> >> I don't know if there is any AFD implementation for Linux yet...
> >
> > This is actually part of the DVB-T standards now. Look at ETSI TR 101 
> > 154
> > v1.41 Annex B.
> >
> > AFD is in addition to the standard MPEG2 aspect ratio stuff.. 
> > basically, it
> > lets the broadcaster describe which area within the frame is relevant, 
> > so you
> > can a 14:9 picture within a "physical" 16:9 one.
> >
> > Its quite easy to implement; I'd recommend using libmpsys to parse the 
> > MPEG
> > transport stream.
> 
> Hmm... I'd quite like to see this implemented, as the BBC and five (in 
> the UK) broadcast all their terrestrial 4:3 output in a 16:9 frame 
> (complete with black pillars) and include an AFD to notify STBs that 
> it's really 4:3.
> 
> Annoyingly, DVB/VDR/Dxr3 do not support AFDs, so any such 4:3 output 
> looks very silly on a 4:3 TV (you get a black border around all four 
> sides).
> 
> Is it possible for the DVB cards to support AFDs?  I don't suppose a 
> Dxr3 can...?
> 
> 

It would be nice if it's possible :) I find it very distracting watching
these channels when they appear like this.




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