Ahem...
There is no burst in the Tri Level Sync. Burst can be
only found in composite analog signals like NTSC, PAL
and SECAM and serves locking the subcarrier oscillator
at the colour decoder side.
Bogdan Grigoresco, BSEE
Sr. Broadcast Engineer
Finalé Editworks, Vancouver
--- Sylvain Labrosse <slabross(at)Softimage.COM> wrote:
> Tri-Level sync is a more accurate video reference in
> HD because it uses
> three sync steps: zero, black and burst.
>
> There is better documentation on this topic if you
> Google but basically
> you MUST use Tri-Level sync with any non-standard
> interlaced and all
> progressive formats. You also must use the correct
> Tri-levels sync for
> specific frame rates.
>
> A standard Black Burst can be used if you work at
> 29.97 (or 25 PAL).
>
> Sylvain Labrosse
> Avid DS Support
> Escalation team
> http://www.softimage.com/avidds
> Check the v7.6 Learning Collection
>
>
>
> -----Original Message-----
> From: owner-ds(at)Softimage.COM
> [mailto:owner-ds(at)Softimage.COM] On Behalf
> Of philc
> Sent: Friday, September 30, 2005 4:16 PM
> To: DS Newsgroup
> Subject: Tri-Level Sync Purpose?
>
> What is the purpose of Tri-Level Sync? Is it used
> during capture and
> output only or only output?
>
> I am starting a 1080i/59.94 project with both DS
> Nitris and an HD
> Adrenaline. I have Tri-Level on the Nitris but have
> never fully
> understood the purpose. Also, I am wondering if I
> need it for the
> Adrenaline. My HD sources are HDcam 1080i--final
> master to HDcam.
>
> --
> Phil Coulloudon
> Senior Editor / Compositor
> Martin Brinkerhoff Associates
> 949.660.9396
>
>
> ---
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