Sony CMOS Sensor Discussion at DVinfo.net

Jack Zhang · September 4th, 2006, 02:24 AM

Who here is shocked to find that all current Sony AVCHD High-Def cam's CMOS sensor is only 1434K effective pixels in AVCHD recording?

All this means to me: Lower Quality. Sony could've raised it to the HC1's 1983K effective pixels. Even the HC3 has only 1493K effective pixels! What's going on here?

Nate Weaver · September 4th, 2006, 05:15 AM

Quote:

Originally Posted by Jack Zhang

What's going on here?

Um, consumer cameras? Seems that hanging your hopes on consumer market cameras to ALWAYS go onward and upward as far as specs might not be wise sport.

Jack Zhang · September 4th, 2006, 04:57 PM

^Sure it's not but the average joe doesn't even have money to rent a Z1 for one day!

Most people don't have $7000 to spend.

Wes Vasher · September 13th, 2006, 09:09 AM

The HC3 looks pretty good so I have hopes for this camera. Though the HV10 has better detail.

Henrik Andersson · October 6th, 2006, 02:34 AM

Ops, see next post.

(I got an error message while posting and posted it again ... bad decision:-(

/Henrik

Henrik Andersson · October 6th, 2006, 02:36 AM

Hello,

I've been thinking of the difference in resolution between a great consumer 3CCD videocamera vs the cheap color filter single chip HDV/AVCHD-cameras.

It seems to me that it wouldn't be that much higher resolution in the first generation of single chip HDV/AVCHD cameras.

Assuming a sampling of fullcolors per pixel (without pixelshift etc) would give about 0.5MP in an PAL widescreen camera ?

The Sony HC1 and HC3 have a 1440x1080 CFA based sampling which should give a luminance resolution of 0.75MP and lower chrominance resolution.

The Canon would be aroung 1MP lumince resolution with its 1920x1080 based image.

(Please note that I've not lowered the resolution due to interlace or any other effect here. I just assume that they don't downscale the image to 1920/1440x1080, it's a crop of the sensors full resolution.)

Some other posts I've made:
http://forums.dpreview.com/forums/re...ssage=19720658
http://forums.dpreview.com/forums/re...ssage=19462155

/Henrik

Mikko Lopponen · October 6th, 2006, 02:12 PM

Quote:

Originally Posted by Henrik Andersson

The Sony HC1 and HC3 have a 1440x1080 CFA based sampling which should give a luminance resolution of 0.75MP and lower chrominance resolution.

HC1 has a full 1920x1440 sensor.

Peter Ferling · October 6th, 2006, 05:45 PM

The only time the HC1 uses the full sensor to media is with digital stills. It's crops top and bottom for video.

Mikko Lopponen · October 7th, 2006, 05:47 PM

Yes but the sensor itself is a full sensor in the same sense as the hv10.

September 4th, 2006, 02:24 AM	#1
Jack Zhang Inner Circle Join Date: May 2005 Location: Burnaby, BC, Canada Posts: 3,053	Sony CMOS Sensor Discussion Who here is shocked to find that all current Sony AVCHD High-Def cam's CMOS sensor is only 1434K effective pixels in AVCHD recording? All this means to me: Lower Quality. Sony could've raised it to the HC1's 1983K effective pixels. Even the HC3 has only 1493K effective pixels! What's going on here?

September 13th, 2006, 09:09 AM	#4
Wes Vasher Major Player Join Date: Jan 2006 Posts: 440	The HC3 looks pretty good so I have hopes for this camera. Though the HV10 has better detail. Last edited by Wes Vasher; September 13th, 2006 at 10:04 AM.

October 6th, 2006, 02:34 AM	#5
Henrik Andersson New Boot Join Date: May 2006 Location: Sweden Posts: 11	Bayer vs 3CCD (pixelshift ?) Ops, see next post. (I got an error message while posting and posted it again ... bad decision:-( /Henrik Last edited by Henrik Andersson; October 6th, 2006 at 04:46 AM.

October 6th, 2006, 02:36 AM	#6
Henrik Andersson New Boot Join Date: May 2006 Location: Sweden Posts: 11	Bayer color filter arrays vs 3CCD or Foveon X3 'full color' sampling. Hello, I've been thinking of the difference in resolution between a great consumer 3CCD videocamera vs the cheap color filter single chip HDV/AVCHD-cameras. It seems to me that it wouldn't be that much higher resolution in the first generation of single chip HDV/AVCHD cameras. Assuming a sampling of fullcolors per pixel (without pixelshift etc) would give about 0.5MP in an PAL widescreen camera ? The Sony HC1 and HC3 have a 1440x1080 CFA based sampling which should give a luminance resolution of 0.75MP and lower chrominance resolution. The Canon would be aroung 1MP lumince resolution with its 1920x1080 based image. (Please note that I've not lowered the resolution due to interlace or any other effect here. I just assume that they don't downscale the image to 1920/1440x1080, it's a crop of the sensors full resolution.) Some other posts I've made: http://forums.dpreview.com/forums/re...ssage=19720658 http://forums.dpreview.com/forums/re...ssage=19462155 /Henrik

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September 4th, 2006, 04:57 PM	#3
Jack Zhang Inner Circle Join Date: May 2005 Location: Burnaby, BC, Canada Posts: 3,053	^Sure it's not but the average joe doesn't even have money to rent a Z1 for one day! Most people don't have $7000 to spend.

October 6th, 2006, 05:45 PM	#8
Peter Ferling Trustee Join Date: May 2005 Location: Wyomissing, PA Posts: 1,141 Images: 57	The only time the HC1 uses the full sensor to media is with digital stills. It's crops top and bottom for video.

October 7th, 2006, 05:47 PM	#9
Mikko Lopponen Major Player Join Date: Mar 2006 Location: Helsinki, Finland Posts: 393	Yes but the sensor itself is a full sensor in the same sense as the hv10.