Is there any kind of delay that requires and offset after capture. I've read the dolby E is generally offset 2 or so frames to accommodate the decode time. Does that come into play in your workflow?
--- In Avid-L2@yahoogroups.com, Mark Spano <cutandcover@...> wrote:
>
> What Pat said.
>
> I use a Tek AMM768 (http://www.tek.com/audio-monitors/amm768) which is an
> audio monitor that has SDI inputs and AES outputs and a Dolby E decoder
> built in. I send the SDI signal from tape through the AMM and decode the E
> into its parts, and capture the channels over AES into a Nitris DX at
> 24-bit / 48 kHz (PCM/MXF). Then, for E encode, I use the Minnetonka SurCode
> for Dolby E encoder (
> http://minnetonkaaudio.com/index.php?option=com_content&view=article&id=83&Itemid=99)
> to do an offline encode at the new frame rate.
>
>
> On Tue, Nov 12, 2013 at 5:11 AM, Pat Horridge <pat@...> wrote:
>
> >
> >
> > Dolby E is just a data stream created with guardbands around the video
> > frame boundaries.
> >
> > So it's PCM uncompressed data.
> >
> > If you capture as PCM (MXF is fine) at 24 bit you will capture a data
> > stream. You can't play it back and hear audio but you can, in theory cut it
> > on video frame boundaries and lay back to tape.
> >
> > It's imperative that it retains sync with the video frames of course.
> >
> > There are plugins that let you decode the data stream to discreet audio
> > channels either in software or in hardware externally.
> >
> > The safest way is to decode the Dolby E on the way in to your Avid and
> > capture 5.1 audio (it could be 8 channels in all)
> >
> > Then frmae rate convert and the re-encode back to Dolby E. that can all be
> > done in software but make a mistake anywhere and you can corrupt the stream.
> >
> >
> >
> > Pat Horridge
> > Technical Director, Trainer, Avid Certified Instructor
> > *VET*
> >
> > *Production Editing Digital Media Design DVD**T* +44 (0)20
> > 7505 4701 | *F* +44 (0)20 7505 4800 | *E* pat@... |
> > *www.vet.co.uk <http://www.vet.co.uk>* | Lux Building 2-4 Hoxton Square
> > London N1 6US
> >
> >
> >
> >
> >
>
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