Monday, November 11, 2013

[Avid-L2] Re: Dolby E frame conversion question

 

Once you ingest it what is used to decode and re-encode? I assume once it's decoded it's the normal 5.1 stems audio I'm use to dealing with. Given this is all data in the dolby E stream is this a virtually loss less process.

--- In Avid-L2@yahoogroups.com, Mark Spano <cutandcover@...> wrote:
>
> I have, with a Nitris DX, ingested a Dolby E stream (as PCM over SDI),
> decoded it successfully, re-encoded it to Dolby E, and spit it out (over
> SDI) back to an SR machine. Only other caveat I'd say is make sure you
> record at 24-bit / 48 kHz. The Dolby E stream is at least 20-bits, so
> decimating to 16-bit will not work.
>
>
> On Mon, Nov 11, 2013 at 10:06 PM, johnrobmoore <bigfish@...> wrote:
>
> >
> >
> > Do you have to go back to the audio suite to do the dolby E relay. I've
> > not dealt much with Dolby E encoding but I do know on the SR decks the
> > audio tracks must be set to data mode for Dolby E IIRC. I don't recall if
> > Avid can ingest a Dolby E stream and spit it back out. I've never tried but
> > the Dolby E signal is screaming hot when on the level meters again IIRC.
> > Can anyone nudge my misrememberance into some actually correct procedures
> > for dealing with Dolby E in an Avid world if that is at all possible.
> >
> > --- In Avid-L2@yahoogroups.com, <tcurren@> wrote:
> > >
> > > Thanks guys. I'll do the relay to the 59.94 method to be safe.
> > >
> > >
> > > ---In Avid-L2@yahoogroups.com, <bogdan_grigorescu@> wrote:
> > >
> > > Definitely possible, but not recommended. The positioning of the DolbyE
> > stream relative to video frame boundaries cannot be guaranteed through the
> > process.
> > > So, the right way to do it is to decode, then re-encode at the target
> > framerate. Or just layback from discrete tracks at the new framerate.
> > >
> > >
> > > cheers,
> > > BG
> > > www.finale.tv http://us-mg5.mail.yahoo.com/neo/www.finale.tv
> > >
> > >
> > >
> > >
> > >
> > > From: "tcurren@" <tcurren@>
> >
> > > To: Avid-L2@yahoogroups.com
> > > Sent: Monday, November 11, 2013 4:57 PM
> > > Subject: [Avid-L2] Dolby E frame conversion question
> > >
> > >
> > > We do a lot of Dolby E mastering, but now a client asked if it would
> > carry across doing a frame conversion from 23.98 to 59.94. My immediate
> > reaction is that it should, but I have never tested this so...
> > >
> > >
> > > Anyone here have experience?
> > >
> >
> >
> >
>

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