Am Fri, 07 Nov 2008 16:55:44 +0100 schrieb Bjorn Danielsson <[EMAIL PROTECTED]>:
> Carsten Meier <[EMAIL PROTECTED]> wrote: > > > > I think you misunderstood me a little bit. Just to be sure we're > > talking about the same thing: http://en.wikipedia.org/wiki/Palplus . > > I know, that my PVRUSB2 doesn't have any decoder-hardware. > > > > To assemble a true 16:9-picture of a PALPlus-broacast, only the > > lines hidden in the black letterbox-bars have to be reinserted into > > the picture. Can that be done with the PVRUSB2? > > According to that Wikipedia article, PAL-plus is a very special > analog encoding that removes 25% of the visible scanlines and > hides their luminance information in the color subcarrier in > the top and bottom black sections. Yes. The availability section of the wikipedia article is a little bit outdated, all major broadcasters in Germany send such a signal for most of its 16:9 content. > In order to mix these lines > back into sequence again you would need either hardware support > or special software that converts the decoded video stream > (if possible) just before displaying the frames on the screen. > All that is needed is a framebuffer (which the PVRUSB2 has) and a little bit of logic to "unhide" the lines and to put them in sequence. (I'm not an expert on this, just my guess... ;) ) Doing that in software on decoding of the MPEG stream is not possible because the additional information is already lost. _______________________________________________ pvrusb2 mailing list [email protected] http://www.isely.net/cgi-bin/mailman/listinfo/pvrusb2
