Re: 608 samples

There are also at least two open-source projects that have CEA-608 caption
decoders - Xine (for the subset that is used on DVDs in the libspucc/
source folder) and CCExtractor. Xine doesn't support roll-up captions,
since they never appear on DVDs, but it handles pretty much everything
else, including a file that Giovanni Galvez threw at me for testing a
couple years ago.

Christian






On Mon, Mar 31, 2014 at 2:39 PM, Philip Jägenstedt <philipj@opera.com>wrote:

> Thank you Ken!
>
> I remember now that SCC was one of the standalone 608 formats you
> mentioned at FOMS. The raw essence is exactly what I'm interested in,
> so that sounds very promising.
>
> I've asked to order a copy of "The Closed Captioning Handbook" for my
> office, it looks very relevant to what I do.
>
> Philip
>
> On Tue, Apr 1, 2014 at 1:10 AM, Ken Harrenstien <klh@google.com> wrote:
> > Giovanni Galvez is still there and still super helpful.
> > Their software is widely used in the industry for format
> > conversion.
> >
> > We host one of their demo videos at
> > http://www.youtube.com/watch?v=BbqPe-IceP4
> >
> > and I'm sure Giovanni can send you the corresponding SCC
> > files for that or any other demo video they have.  The reason
> > I suggest SCC is that this format contains the raw 608 essence
> > that we care about; in fact, this is YouTube's preferred upload
> > format for movie/TV content.  If you want to know how to extract those
> > bytes from a video file, then you have a much harder task given
> > the multitude of video containers and formats.
> >
> > And yes, the CFR link, while terse, does contain pretty much all
> > of the important bits.  The CEA documents are mostly about
> > XDS data, which has nothing to do with captions.  For
> > purposes of WebVTT conversion a much better place to start
> > learning about 608 is the "Closed Captioning Handbook" by Gary Robson,
> > which should still be available on Amazon.  I like it because it's
> > very readable and has so much other interesting context.
> >
> > On the other hand, if you plan to implement some kind of
> > cable set-top box, then yes, you'll need the CEA documents
> > plus several other specs.
> >
> > --Ken
> >
> >
> > On Mon, Mar 31, 2014 at 8:58 AM, Philip Jägenstedt <philipj@opera.com>
> > wrote:
> >>
> >> Do you mean http://www.cpcweb.com/webcasts/webcast_samples.htm ?
> >>
> >> What I'm looking for is the actual video file that contains the 608
> >> data, preferably with some clue about how to extract it as well :)
> >>
> >> Philip
> >>
> >> On Mon, Mar 31, 2014 at 10:16 PM, Christian Vogler
> >> <christian.vogler@gallaudet.edu> wrote:
> >> > Gio Galvez at CPC did a video like that. His company was bought out,
> but
> >> > it
> >> > might still be possible to get access. Should I ask?
> >> >
> >> > Sent from my mobile phone.  Please excuse any touchscreen-induced
> >> > weirdness.
> >> >
> >> > On Mar 31, 2014 9:53 AM, "Philip Jägenstedt" <philipj@opera.com>
> wrote:
> >> >>
> >> >> Hi all,
> >> >>
> >> >> Does anyone have access to 608 caption data and recommendations for
> >> >> software that is known to render it correctly? I'd like to understand
> >> >> the 608 model at the lowest level, but it's hard without examples.
> I'm
> >> >> guessing that people who have worked on 608 to WebVTT already have
> >> >> sample files and scripts to process them, so anything like that would
> >> >> be appreciated.
> >> >>
> >> >> Also, the spec is incredibly brief, is there really nothing better
> than
> >> >> this?
> >> >> http://edocket.access.gpo.gov/cfr_2007/octqtr/pdf/47cfr15.119.pdf
> >> >>
> >> >> Philip
> >> >>
> >> >
> >>
> >
>



-- 
Christian Vogler, PhD
Director, Technology Access Program
Department of Communication Studies
SLCC 1116
Gallaudet University
http://tap.gallaudet.edu/
VP: 202-250-2795