[opendtv] Re: Spam Filter?
- From: "Cliff Benham" <cliff.benham@xxxxxxxxxxxx>
- To: <opendtv@xxxxxxxxxxxxx>
- Date: Mon, 10 Jan 2005 11:40:57 -0500
I think there may be a bit of confusion here.
The artifacts being discussed are not caused by interlace per se, as in =
1080i.
They are due to less than perfect 'de-interlacing circuitry' in the TV.
I.E., the artifacts in the 'now progressive scan' image are caused by =
the=20
inability of the circuitry to deinterlace properly.
-----Original Message-----
From: opendtv-bounce@xxxxxxxxxxxxx
[mailto:opendtv-bounce@xxxxxxxxxxxxx]On Behalf Of John Golitsis
Sent: Monday, January 10, 2005 10:13 AM
To: opendtv@xxxxxxxxxxxxx
Subject: [opendtv] Re: Spam Filter?
To catch interlace artifacts, you'd have to be looking at a scene with=20
motion. LCD is slow, leaving visible motion blur. DLP has what others=20
are calling "temporal dithering". AND, very few sets with these=20
technologies have a native resolution of 1920x1080, so there's scaling=20
happening, on top of deinterlacing.
With all those factors taken into account, how can anyone possibly=20
conclude that the artifacts they're seeing are due to interlace?
On 10-Jan-05, at 9:59 AM, Craig Birkmaier wrote:
>
> I'll second that, and note that NONE of these display technologies
> have artifacts that can easily be confused with interlace artifacts.
> Contouring, the lack of detail in dark and bright regions, color
> fringing (single chip DLP) , and colorimetry issues as DISPLAY
> artifacts.
>
> The biggest problem continues to be that which Tom alluded to:
>
> It is very difficult to do a good job de-interlacing in the receiver
> as opposed to using a high(er) quality professional system prior to
> encoding for emission. It get's even harder if the receiver is
> forced to work with a noisy analog signal (aka cable) or a trashed
> MP@ML encoding that presents the de-interlace chip with excessive
> quantization noise (AKA DBS).
>
=20
=20
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