About 1080i at DVinfo.net

Zachary Reusing · February 13th, 2008, 04:58 PM

So this might be a dumb question... But I am a little confused...

The XH-A1 has a maximum output of 1080i, which is high quality but a lesser quality than 1080p. But, here's my question:

If you are shooting at 24F, which isn't interlaced, than the picture should not be 1080i, right? So is it 720p or 1080p? Or am I totally confused right now...

Thanks!

Z

Pete Bauer · February 13th, 2008, 05:11 PM

Hi Zachary,
Congrats on your first post. You'll find a number of existing threads discussing the finer points in this forum and the XL H1 forum but here's the basics. The HDV pixel count is 1440x1080 at 23.976 progressive frames per second with a pixel aspect ratio of 1.3; the HD-SDI signal will be put out at 1920x1080 square pixels at 60i with 2:3 pulldown. Static resolution on standard rez charts will be a little less than the 60i mode.

Chris Hurd · February 13th, 2008, 06:20 PM

Quote:

Originally Posted by Zachary Reusing

1080i, which is high quality but a lesser quality than 1080p.

Sorry but that's not right. 1080i isn't necessarily a "lesser quality" than 1080p. For example, 1080p at only 15 frames per second definitely would be worse than 1080i at 60 fields per second.

Frame rate has a lot to do with it. In short: 1080i60 is the same bandwidth as 1080p30.

Quote:

If you are shooting at 24F, which isn't interlaced, than the picture should not be 1080i, right? So is it 720p or 1080p?

There is no 720p in this camera. Shooting at 24F is 1080p24.

Russell Pearce · February 14th, 2008, 06:36 AM

Any reason canon put "1080i" on the cam instead of "1080P" ?

Russ

Chris Hurd · February 14th, 2008, 08:20 AM

Because it's first and foremost a 1080i camera with 1080i chips and a 1080i format (HDV2).

Deke Ryland · February 14th, 2008, 11:00 AM

Is the A1's 30F the same as 1080p30?

David Parks · February 14th, 2008, 11:04 AM

Quote:

Originally Posted by Deke Ryland

Is the A1's 30F the same as 1080p30?

Yes. On FCP, you can edit 30f in a 1080/30p timeline.

February 13th, 2008, 04:58 PM	#1
Zachary Reusing Tourist Join Date: Dec 2006 Location: Orange CA USA Posts: 2	About 1080i So this might be a dumb question... But I am a little confused... The XH-A1 has a maximum output of 1080i, which is high quality but a lesser quality than 1080p. But, here's my question: If you are shooting at 24F, which isn't interlaced, than the picture should not be 1080i, right? So is it 720p or 1080p? Or am I totally confused right now... Thanks! Z

February 13th, 2008, 05:11 PM	#2
Pete Bauer Wrangler Join Date: May 2003 Location: Eagle River, AK Posts: 4,100	Hi Zachary, Congrats on your first post. You'll find a number of existing threads discussing the finer points in this forum and the XL H1 forum but here's the basics. The HDV pixel count is 1440x1080 at 23.976 progressive frames per second with a pixel aspect ratio of 1.3; the HD-SDI signal will be put out at 1920x1080 square pixels at 60i with 2:3 pulldown. Static resolution on standard rez charts will be a little less than the 60i mode. __________________ Pete Bauer The most beautiful thing we can experience is the mysterious. It is the source of all true art and science. Albert Einstein Trying to solve a DV mystery? You may find the answer behind the SEARCH function ... or be able to join a discussion already in progress!

February 14th, 2008, 06:36 AM	#4
Russell Pearce Regular Crew Join Date: Aug 2006 Location: Birmingham England Posts: 69 Images: 1	Any reason canon put "1080i" on the cam instead of "1080P" ? Russ Last edited by Russell Pearce; February 14th, 2008 at 06:36 AM. Reason: left name off

February 14th, 2008, 08:20 AM	#5
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,368 Images: 513	Because it's first and foremost a 1080i camera with 1080i chips and a 1080i format (HDV2). __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

February 14th, 2008, 11:00 AM	#6
Deke Ryland Major Player Join Date: Nov 2006 Location: Washington, USA Posts: 213	Is the A1's 30F the same as 1080p30?