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Topic: Star Wars A New Hope - first digital version
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John Pytlak
Film God
Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000
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posted 03-21-2002 10:03 PM
Dave asked: "Do you think our patrons will accept the feature freezing and pixellating if there's a server or transmission problem? They seem to accept some pretty bad film presentations without complaint..."See my posting about my experience with "hiccups" on a Digital Cinema presentation of "Ice Age" at the AMC Empire Theatre in NYC last night (9:45pm show, March 20, Auditorium 13). This started happening every 15 seconds or so during the trailers, and the audience started murmering and getting upset  , such that they stopped the show, and had to complete the show with a film print. ------------------
John P. Pytlak, Senior Technical Specialist
Worldwide Technical Services, Entertainment Imaging
Research Labs, Building 69, Room 7525A
Rochester, New York, 14650-1922 USA
Tel: +1 585 477 5325 Cell: +1 585 781 4036 Fax: +1 585 722 7243
E-Mail: john.pytlak@kodak.com
Web site: http://www.kodak.com/go/motion
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Dave Williams
Wet nipple scene
Posts: 1836
From: Salt Lake City, UT, USA
Registered: Jan 2000
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posted 03-23-2002 04:26 AM
I also saw the problems you are talking about with your sattelite. Some programs and some networks have it worse than others. The basic lowdown is this...You have two kinds of digital compression, mpeg-1 and mpeg-2. The sattellites used mpeg-1 for a while, and then upgraded to mpeg-2. Mpeg-2 has a higher compression rate and in the same space can contain up to four times as much information as mpeg-1. Ok, now we have that, here is the problem. If a channel you are watching gets compressed past its own limits, you get visual artifacts such as the ones you see where they seem to trail. In effect, you are watching a virtual mpeg-1 stream with an mpeg-2 program. Its like watching a ferrarri pass a pinto. YOu know its a ferrari, but you cant make out if it had a human bieng driving it or not. The problems will eventually eliminate themselves. Echostar is about to put thier seventh satellite in orbit, and they are merging with direct tv. This will provide enough satelites to provide the proper bandwidth to eliminate this problem. Sometimes it is the network itself. If they compress it too far for the upstream without notifying the relay satelite what the compression ratio is, it will continue to compress it more. I would blame UPN for most of the problem, as they are run by paramount, a bunch of people well known for producing way too many star trek programs. Dave
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