100a 24pA (Interlaced Look) at DVinfo.net

Art Guglielmo · January 5th, 2004, 07:54 PM

Does anyone notice that in 24pA mode, interlaced artifacts seem to be more evidant than in 24p Standard. If you shoot something with thin angled lines, 24p has virtually no interlaced "Stairsteps", but switching to 24pA, they pop out. Is this normal, and will a transfer to 24 fps output (Film) get rid of this.

Barry Green · January 5th, 2004, 08:18 PM

Try setting up the same test footage, but switch between vertical detail "THIN" and "THICK". I bet you'll find that with "THICK" selected, the edges are smoother.

If so, it's not a bug, it's an artifact of trying to display a higher-than-NTSC-resolution image on an NTSC display device.

Art Guglielmo · January 5th, 2004, 08:52 PM

Thanks for the quick reply, i will try that. This camera is new, so still learning the inner workings.

Beautiful images though, very happy with my purchase.

David Ziegelheim · January 7th, 2004, 12:26 AM

Could this also be caused by viewing 24PA footage directly? You have AABBBCCCDD instead of AABBBCCDDD which should look less smooth.

After capturing into the editor of choice (FCP or Vegas) as 23.97 progessive and then rendering/exporting a 3:2 pulldown, does the problem still exist?

Art Guglielmo · January 7th, 2004, 06:35 AM

Thats a good question. This friday i will be shooting in all different modes, then exporting to dvd. Hopefully, more questions will be answereed than raised. Thanks for the ideas, i will give it a try.

January 5th, 2004, 07:54 PM	#1
Art Guglielmo Regular Crew Join Date: Jan 2004 Posts: 35	100a 24pA (Interlaced Look) Does anyone notice that in 24pA mode, interlaced artifacts seem to be more evidant than in 24p Standard. If you shoot something with thin angled lines, 24p has virtually no interlaced "Stairsteps", but switching to 24pA, they pop out. Is this normal, and will a transfer to 24 fps output (Film) get rid of this.

January 5th, 2004, 08:18 PM	#2
Barry Green Barry Wan Kenobi Join Date: Jul 2003 Location: North Carolina Posts: 3,863	Try setting up the same test footage, but switch between vertical detail "THIN" and "THICK". I bet you'll find that with "THICK" selected, the edges are smoother. If so, it's not a bug, it's an artifact of trying to display a higher-than-NTSC-resolution image on an NTSC display device.

January 5th, 2004, 08:52 PM	#3
Art Guglielmo Regular Crew Join Date: Jan 2004 Posts: 35	Thanks for the quick reply, i will try that. This camera is new, so still learning the inner workings. Beautiful images though, very happy with my purchase.

January 7th, 2004, 12:26 AM	#4
David Ziegelheim Major Player Join Date: Jul 2003 Location: Warren, NJ Posts: 398	Could this also be caused by viewing 24PA footage directly? You have AABBBCCCDD instead of AABBBCCDDD which should look less smooth. After capturing into the editor of choice (FCP or Vegas) as 23.97 progessive and then rendering/exporting a 3:2 pulldown, does the problem still exist?

January 7th, 2004, 06:35 AM	#5
Art Guglielmo Regular Crew Join Date: Jan 2004 Posts: 35	Thats a good question. This friday i will be shooting in all different modes, then exporting to dvd. Hopefully, more questions will be answereed than raised. Thanks for the ideas, i will give it a try.