Bayer- vs 3CCD- resolution in HDV/AVCHD at DVinfo.net

Henrik Andersson · October 6th, 2006, 02:45 AM

Hello,

How would you rate the resolution between the new single chip Bayer (?) CFA based HDV/AVCHD cameras vs the 'old' 3CCD PAL video cameras ?

To me it seems that the Canon HV10 have about 1MP luminance resolution and the Sonys about 0.75 MP while an old great, but still consumer grade, 3CCD PAL camera could have up to 0.5MP luminance resolution.

Here are some links to my other posts about this:
http://www.dvinfo.net/conf/showthrea...d=1#post553296
http://forums.dpreview.com/forums/re...ssage=19720658
http://forums.dpreview.com/forums/re...ssage=19462155

Am I on the right track ?

/Henrik

Glenn Chan · October 6th, 2006, 05:35 AM

Here's what some interlaced 3CCD cameras do:

When they read out, they actually read off three lines when generating a single line. The weighing might be 1/4 for the top, 1/2 for the middle, 1/4 for the bottom.
This can improve SNR, reduce interlace flicker.

If you just take 4/4 from the middle, then the line above and below don't really do anything. They sit there collecting photons which won't be used at all, since those pixels sit at a field that's not being scanned at that moment.

For a bayer camera:
Here is one camera system described:
http://www.siliconimaging.com/RGB%20Bayer.htm

De-bayering may occur across 2 columns and 2 rows.

Ken Hodson · October 6th, 2006, 04:13 PM

Here is a link to a Steve Mullen article that may be of help. At the top of the page is a link to the PDF version which should be easier to read.

http://72.14.203.104/search?q=cache:...ient=firefox-a

October 6th, 2006, 02:45 AM	#1
Henrik Andersson New Boot Join Date: May 2006 Location: Sweden Posts: 11	Bayer- vs 3CCD- resolution in HDV/AVCHD Hello, How would you rate the resolution between the new single chip Bayer (?) CFA based HDV/AVCHD cameras vs the 'old' 3CCD PAL video cameras ? To me it seems that the Canon HV10 have about 1MP luminance resolution and the Sonys about 0.75 MP while an old great, but still consumer grade, 3CCD PAL camera could have up to 0.5MP luminance resolution. Here are some links to my other posts about this: http://www.dvinfo.net/conf/showthrea...d=1#post553296 http://forums.dpreview.com/forums/re...ssage=19720658 http://forums.dpreview.com/forums/re...ssage=19462155 Am I on the right track ? /Henrik

October 6th, 2006, 04:13 PM	#3
Ken Hodson Trustee Join Date: Aug 2003 Location: Vancouver BC Canada Posts: 1,315	Here is a link to a Steve Mullen article that may be of help. At the top of the page is a link to the PDF version which should be easier to read. http://72.14.203.104/search?q=cache:...ient=firefox-a __________________ Damnit Jim, I'm a film maker not a sysytems tech.

October 6th, 2006, 05:35 AM	#2
Glenn Chan Inner Circle Join Date: Jun 2003 Location: Toronto, Canada Posts: 4,750	Here's what some interlaced 3CCD cameras do: When they read out, they actually read off three lines when generating a single line. The weighing might be 1/4 for the top, 1/2 for the middle, 1/4 for the bottom. This can improve SNR, reduce interlace flicker. If you just take 4/4 from the middle, then the line above and below don't really do anything. They sit there collecting photons which won't be used at all, since those pixels sit at a field that's not being scanned at that moment. For a bayer camera: Here is one camera system described: http://www.siliconimaging.com/RGB%20Bayer.htm De-bayering may occur across 2 columns and 2 rows.