Film-Tech Forum ARCHIVE: Jeff Joseph Live on CNN

my profile | my password | search | faq & rules | forum home

»	Film-Tech Forum ARCHIVE » Community » Film-Yak » Jeff Joseph Live on CNN (Page 2)

This topic comprises 2 pages: 1 2

Author

Topic: Jeff Joseph Live on CNN

Paul Linfesty
Phenomenal Film Handler

Posts: 1383
From: Bakersfield, CA, USA
Registered: Nov 1999

posted 09-22-2003 12:56 AM

MANY people prefer 720p over 1080i and have argued the image is better since it conforms to a film-like standard. All lines of one image at a time, eliminating shimmer, etc. Lots of artifacts result from any interlaced format, and the sooner video moves away from Interlaced, the better. And this comes from one who shoots in NTSC interlaced.

| IP: Logged

John Pytlak
Film God

Posts: 9987
From: Rochester, NY 14650-1922
Registered: Jan 2000

posted 09-22-2003 11:28 AM

AFAIK, ABC and ESPN are still backing the 720P HD format:

http://espn.go.com/abcsports/pressreleases/s/2002/0925/1436510.html

http://abclocal.go.com/wtvd/ontv/020003_hdtvfaqs.html

quote:
I have heard that there are two HDTV formats — 720p and 1080i. Is there a difference between these formats and can my television receive both these formats?
Regardless of the HDTV format being broadcast, all new HDTV receivers can receive both formats. New HDTV televisions will convert any received signal to a format that is compatible with your new display. The 720p format uses progressive scanning, which is just like your computer monitor. Progressive scan offers crystal clear images that virtually eliminates those scanning lines that are visible on most large screen televisions. ABC broadcasts all of its programming using the 720p format except in Dallas, where the ABC station broadcasts in 1080i. Many new flat panel displays use progressive scan.

The 1080i format uses interlace scanning just like today's analog televisions. Scanning lines are less visible on big screens due to the number of lines. Most currently available projection HDTV's use 1080i.

| IP: Logged

John Hawkinson
Film God

Posts: 2273
From: Cambridge, MA, USA
Registered: Feb 2002

posted 09-22-2003 12:02 PM

Joe asks, "I still don't understand how you see 720p being inferior to 480p. Doesn't make sense. More resolution=better picture quality."

My understanding is that in order to obtain more resolution in the limitted available HDTV bandwidth, they need to apply more compression, resulting in more nasty compression artifacts. So resolution is not the only determinant of HDTV quality [Frown]

.

I'm not 100% that this applies to 480p versus 720p, but I know it does apply for some HDTV formats. And then let's not even get into the 3:2 pulldown issues.

--jhawk

| IP: Logged

Joe Redifer
You need a beating today

Posts: 12859
From: Denver, Colorado
Registered: May 99

posted 09-22-2003 05:05 PM

3:2 pulldown should really be an issue, being that 480p and 720p can run at 24, 30, and 60 FRAMES per second natively. Just as long as the source is progressive you should be OK. If it is not progressive, then you are probably watching an NTSC originated program anyway. I see absolutely no reason for pulldown with the HDTV spec. I understand the compression issues for broadcast, but that's not really an issue at home say, playing an Xbox game in 720p.

| IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1 2

Printer-friendly view of this topic

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.