Re: hdcam close captioning q

[Jef Huey <jhuey(at)henninger.com>]

Hi Ed,

You are at a similar point in the education mode as I am.  My question 
really hones down to three things:

1.    Can HDW-500 and HDW-F500 pass theVANC from machine to machine in 
an HDSDI "Clone" ?   If so, how does one set the machines up.   I see 
discussion of this with the HDW-2000 machines, not the older ones.

2.   Can a DS Nitris successfully record the VANC and play it back?   I 
have had two totally different responses from DS Support on this.  Yes 
and No?  What is the truth?   I did find a refernce to DS being able to 
do this, but that related to an Equinox system and was a very old white 
paper on the web.

3.   What is an easy fool proof way to check HD captioning?

The truth is out there, but I am having trouble finding it.

Thanks,
Jef



Ed Fraticelli wrote:

> This paper from Evertz may be helpful.
>
> http://www.evertz.com/resources/cc-imp-paper.pdf
>
> Basically, CC data is RECORDED in HD recorders in the VANC (Video
> Ancillary Data) area of the SDI bitstream.  This area is not "visible"
> on the screen as older line-21 encoded CC is.  It is just "data" and is
> passed along in subsequent recordings.
>
> Now, when this video is BROADCASTED in an ATSC DTV broadcast, this CC
> data is encoded into a special area of the ATSC bitstream, which is
> different than the SDI stream recorded on the master tape.  Same data, I
> think.  Just a different packaging.
>
> I THINK this is how it works, on a technical level.
>
> The workflow is pretty much the same as when doing normal CC work.  The
> master tape is fed through an encoder, which inserts the data into the
> VANC and the result is recorded on another deck.  This signal is played
> through a decoder, which then displays the results.
>
> Ed at PMI
> Pittsburgh, PA
> USA
>
>
> -----Original Message-----
> From: owner-ds(at)Softimage.COM [mailto:owner-ds(at)Softimage.COM] On Behalf
> Of Keuler, Bob
> Sent: Monday, October 03, 2005 10:30 AM
> To: DS(at)Softimage.COM
> Subject: RE: hdcam close captioning q
>
> Hi Jef,
>
> All I can tell you is that we recently had a CC HD Master made. I
> watched the tape in SD through the HDCam D-Converter and did not see a
> CC Signal! Did the facility forget to CC the master? Is the HD CC signal
> recorded in a different manner than in SD? Does the HDCam D-Converter
> board blank the Vertical Interval? Could there also be an issue going
> from HD 1080i to SD Letterbox and the captioning not working? So far,
> I'm guessing we would need to have SD versions made with CC as the CC
> would get lost in the D-Convert. I'm looking into it but I thought I'd
> just give you a heads up.
>
> Bob Keuler
> Senior Avid|DS Editor
> WLIW Productions
> 450 West 33rd St. (7th Floor)
> New York, N.Y. 10001
> (212)560-8843
> keulerb(at)wliw.org
>
>
> -----Original Message-----
> From: owner-ds(at)Softimage.COM [mailto:owner-ds(at)Softimage.COM] On Behalf
> Of Jef Huey
> Sent: Monday, October 03, 2005 10:13 AM
> To: DS(at)Softimage.COM
> Subject: hdcam close captioning q
>
>
> Anybody out there with a bit of experience delivering close captioning 
> on HDCam tapes?
>
> I have some workflow questions.
>
> Thanks,
>
> Jef
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