Edge Enhancement Questions?

I have just been reading quite an interesting article about Edge
Enhancement
on www.videophile.info "Ultimate Guide to Edge Enhancement" by
Bjoern
Roy. He states on page 5 of the article:

"Titanic is probably the only dvd that doesn't have any EE applied to
it.
I don't mean little, I mean NONE. Nor is the image low-pass filtered
in any
form, resulting in hefty interlace flicker(rails...) on non-scaled
displays,
but incredible detail(even for a non-anamorphic transfer) on high end
systems.
If the transfer was anamorphic,this would probably be the defacto
standard as
to what can be done with DVD."

He further states at about page 9(second last page of the article)
that transfers are low-pass filterd to prevent hefty flickering and
aliasing on
interlaced display. Since he states that Titanic is not low-pass
filtered nor edge-enhanced would this mean that there would be quite
noticeable flickering and aliasing when viewed on a normal interlace
TV?

If you just low-pass filter the image but don't use edge enhancement
what effect does this have on the image?

If it is necessary to use low-pass filtering to get rid of flickering
on interlaced displays must you always use EE to compensate for this?

When he refers to "rails" what exactly is he referring to?

If you don't low pass filter the image nor use EE and view the image
on a progressive display should the image be theoretically perfect?

Finally has anybody seen the new Lawrence of Arabia Superbit on a
large screen
Progressive display and if so how does it look in terms of EE and
generally compared to the earlier 2 disc Collectors edition?

Regards,
Peter Mason

Peter Mason

"Peter Mason" <> wrote in message
news: om...
> He further states at about page 9(second last page of the article)
> that transfers are low-pass filterd to prevent hefty flickering and
> aliasing on
> interlaced display. Since he states that Titanic is not low-pass
> filtered nor edge-enhanced would this mean that there would be quite
> noticeable flickering and aliasing when viewed on a normal interlace
> TV?

Yes.

> If you just low-pass filter the image but don't use edge enhancement
> what effect does this have on the image?

Low pass filtering makes the image softer and reduces apparent
fine-object detail.

> If it is necessary to use low-pass filtering to get rid of flickering
> on interlaced displays must you always use EE to compensate for this?

No. The problem is that the telecine technicians generally
overcompensate for the softening effect of the filtering by applying
edge enhancement to "sharpen it back up".

> If you don't low pass filter the image nor use EE and view the image
> on a progressive display should the image be theoretically perfect?

Well, there are lots of other problems that can go wrong in a video
transfer.

Joshua Zyber

(Peter Mason) wrote in message news:<. com>...
> I have just been reading quite an interesting article about Edge
> Enhancement
> on www.videophile.info "Ultimate Guide to Edge Enhancement" by
> Bjoern
> Roy. He states on page 5 of the article:
>
> "Titanic is probably the only dvd that doesn't have any EE applied to
> it.
> I don't mean little, I mean NONE. Nor is the image low-pass filtered
> in any
> form, resulting in hefty interlace flicker(rails...) on non-scaled
> displays,
> but incredible detail(even for a non-anamorphic transfer) on high end
> systems.
<snip>
>
> When he refers to "rails" what exactly is he referring to?
>
>

The rails on the ship. These thin, curved lines are exceedingly
difficult to render properly on an interlaced system.

Mark

gardibolt

(Peter Mason) wrote:
> I have just been reading quite an interesting article about Edge
> Enhancement on www.videophile.info
> "Ultimate Guide to Edge Enhancement" by Bjoern Roy. He states on
> page 5 of the article:
>
> "Titanic is probably the only dvd that doesn't have any EE applied to
> it.

Hmm... Maybe I ought to buy or rent a copy to look...

> If you just low-pass filter the image but don't use edge enhancement
> what effect does this have on the image?

It will probably look soft.

> If it is necessary to use low-pass filtering to get rid of flickering
> on interlaced displays must you always use EE to compensate for this?

Of course not.

> When he refers to "rails" what exactly is he referring to?

Probably the rails around the deck of the Titanic, that people lean
on and prevents them from falling into the sea...

> If you don't low pass filter the image nor use EE and view the image
> on a progressive display should the image be theoretically perfect?

Perfect is such a strong word... obviously the flicker reduction
filtering and the edge enhancement are there to improve the quality
on mid-range displays.

Samuel Paik

(Samuel Paik) wrote in message news:<. com>...
> (Peter Mason) wrote:
> > I have just been reading quite an interesting article about Edge
> > Enhancement on www.videophile.info
> > "Ultimate Guide to Edge Enhancement" by Bjoern Roy. He states on
> > page 5 of the article:
> >
> > "Titanic is probably the only dvd that doesn't have any EE applied to
> > it.
>
> Hmm... Maybe I ought to buy or rent a copy to look...

If you do I would really appreciate it if you would let me know your
opinion of the transfer?

Regards,
Peter Mason

Peter Mason

Peter Mason wrote:
>
> (Samuel Paik) wrote in message news:<. com>...
> > (Peter Mason) wrote:
> > > I have just been reading quite an interesting article about Edge
> > > Enhancement on www.videophile.info
> > > "Ultimate Guide to Edge Enhancement" by Bjoern Roy. He states on
> > > page 5 of the article:
> > >
> > > "Titanic is probably the only dvd that doesn't have any EE applied to
> > > it.
> >
> > Hmm... Maybe I ought to buy or rent a copy to look...
>
> If you do I would really appreciate it if you would let me know your
> opinion of the transfer?

It's not the only DVD without any EE, but these are indeed very rare.
So are HD transfers without EE (or aperture correction).
The Titanic HD transfer is unusually soft for HD.

Michel Hafner

"Michel Hafner" <> wrote in message
news:...
> It's not the only DVD without any EE, but these are indeed very rare.
> So are HD transfers without EE (or aperture correction).
> The Titanic HD transfer is unusually soft for HD.

That's because it's non-anamorphic.

Joshua Zyber

Joshua Zyber wrote:
>
> "Michel Hafner" <> wrote in message
> news:...
> > It's not the only DVD without any EE, but these are indeed very rare.
> > So are HD transfers without EE (or aperture correction).
> > The Titanic HD transfer is unusually soft for HD.
>
> That's because it's non-anamorphic.

HD, not DVD! HD is never 16:9 enhanced. The DVD is very sharp for
letterbox material.

Michel Hafner

"Michel Hafner" <> wrote in message
news:...
> > > It's not the only DVD without any EE, but these are indeed very
rare.
> > > So are HD transfers without EE (or aperture correction).
> > > The Titanic HD transfer is unusually soft for HD.
> >
> > That's because it's non-anamorphic.
>
> HD, not DVD! HD is never 16:9 enhanced. The DVD is very sharp for
> letterbox material.

There is an HD edition of Titanic? It's not available on DVHS to my
knowledge. Are you talking about an HBO transfer? If so, I'd imagine it
was cropped to 16:9 like all of their other non-OAR transfers.

Joshua Zyber

Joshua Zyber wrote:
>
> "Michel Hafner" <> wrote in message
> news:...
> > > > It's not the only DVD without any EE, but these are indeed very
> rare.
> > > > So are HD transfers without EE (or aperture correction).
> > > > The Titanic HD transfer is unusually soft for HD.
> > >
> > > That's because it's non-anamorphic.
> >
> > HD, not DVD! HD is never 16:9 enhanced. The DVD is very sharp for
> > letterbox material.
>
> There is an HD edition of Titanic? It's not available on DVHS to my
> knowledge. Are you talking about an HBO transfer? If so, I'd imagine it
> was cropped to 16:9 like all of their other non-OAR transfers.

Yes, HBO, I think. It's 2.35 : 1.

Michel Hafner