a tech. Request s.den Service of SONY, I received the following reply:
Quote:
A one-chip camcorder, not cut the picture into three primary colors, but records the picture in a Resolutionvon 720 x 576 pixels with one chip, but the Resolutionentspricht the PAL standard. The chip should have at least 414 720 pixels to the video in its Resolutionaufzeichnen able to PAL. Is a chip equipped with more pixels, then the> 414 720 pixels for the electronic anti-shake can be used. Does the camcorder still function as a photo in the megapixel range, the chip is in line with the anti-shake + photo resolution high. Example: DCR-HC42 Video Resolution 720 x 576, photo resolution max. 1152x864 pixels chip size = 1070000
So I wonder why I should not really buy camera with 800,000 pixels? But there really is no reason why, right?
Antwort von Jan:
Hello Hannes,
if it would have to be very well made, then you would need a 3CCD camcorder with 3x ever received an 414,720 for each primary color (red, green, blue) to a perfect picture of Pal. Chipper With 1 the colors are added through a filter. But that is for normal people synonymous sufficient.
Good thing I can not understand this sentence Sonyaus of Cologne:
The chip should have at least 414 720 pixels to the video in its Resolutionaufzeichnen able to PAL. Is a chip equipped with more pixels, then these!> 414 720 pixels for the use of electronic anti-shake.
I have learned that it is needed the most with 800,000 pixels Sony's approximately 400,000 pixels for ca.400.000's Picture and the generally good stabilizer.
The companies are ambiguous, questionable or not express, we had often lately such as: review JVC GR-D 270 o 290 (I have to date no response from the technology of JVC Professional Germany JVC) or BSP 2 with SonyPC which stands at 1000 Sony.de Sensor / CCD Image Device, although not with a CCD but a CMOS chip is working (although If in the initial description, but not with the technical details)
January
Antwort von Markus:
"Jan" wrote:
... if it would have to be very well made, then you would need a 3CCD camcorder with 3x ever received an 414,720 for each primary color (red, green, blue) to a perfect picture of Pal. Chipper With 1 the colors are added through a filter.
More info on this (S.05 contributions. August 2005, 14:41 Clock):
Antwort von Jan:
Hello,
This means that you not right Mark? An extremely interesting and confusing for regular users post. In other forums are a part of the members 50/50 in relation to this question. Well am not a technician ....
January
Antwort von Markus:
Hello Jan,
I wanted to give an assessment of recent contributions, but only provide additional information. ;-)
When 3CCD camcorder is the thing quite clear: A prism splits the incident Primärfarbanteile color in the red, green and blue. Each of the three CCDs precisely in theory now requires 720 x 576 = 414,720 pixels for the complete recording of a PAL image. From the individual red, green and blue values are synonymous, both the magnitude and the color of each pixel (calculation of the brightness calculated: See the formula of "Bluescreen: andere Farben?"Luke) in the "Bluescreen: andere Farben?"post.
When 1CCD camcorder, however, a filter matrix of the incident light is selected so that a single point on the CCD sees only a certain color ". From the information gained will be calculated including color photos (interpolated), since there is only one red, green or blue value per pixel.
In order to work nearly so, like a camcorder with three CCDs, would need a camcorder with only an image intensifier 3 x 414,720 = 1,244,160 pixels, so that is collected for each pixel of a PAL video image synonymous all three primary colors. But this possibility would be synonymous not optimal, because the colors do not exactly s.der same place, but were spatially offset recorded.
I hope my attempt at an explanation is not to be confused ... ;-)
Antwort von hannes:
'I hope my attempt at an explanation is not to be confused ... ;-)
No he is not, But to confuse him completely, I would have liked another statement types to the question:
One field is now interpolated at 720 x 576 or only 720 x 288? More (one does not need) If the latter is true, would the distribution of pixels on the chip so to change.
That would at least in the width significantly greater than PAL.
(;-))) Megabreitesgrinsen
Good luck from Essen hannes
Antwort von Markus:
"hannes" wrote:
One field is now interpolated at 720 x 576 or only 720 x 288? More (one does not need)
I do not know, but I still remembered one more question: the CCD sensors on the same pixel aspect ratio as the pixels of the PAL television have? - I'd rather not think ... ;-)
Antwort von hannes:
> Are the sensors on the same CCD pixel aspect ratio as the pixels of the PAL television?
definitely NO. They are square, they can indeed synonymous, as they with the 720 pixels of the DV signal have to do anything. In the case of CCDs, we're still in the analogue domain. The 720 pixels for digital signal are indeed determined until after the quantization in the A / D converter by the following algorithm.
Antwort von molch:
Hi, good to see the disadvantage of farbversetzung at einchippern resolution is in the test charts. wander through the black and white are just exactly pixel from black and white divide a pixel expected. thereby getting farbstreifen the lines. and the unnatural colors synonymous probably resulted from the displacement of the pixel, as the filmed object s.der eg just put the green-pixel color values may have other than red for the-pixel. minimal deviations mess up the colors ... Only when one sees better 1-chippers as distinguished for the sony hc1 of none.
Cr and Cb samples are on alternate lines in each field (frame a view would show two lines of YCR, Y pairs, then two lines of YCB, Y pairs).
Antwort von Hugo:
Admitted are not red / green / blue, but color difference! For these colors are calculated.
720x576 pixels than enough for a black and white picture :-)
Has nothing whatsoever to do with a color picture to.
So does 4:2:0 (PAL DV, DVD where, main-profile MPEG-2) fit in? 4 x Y, 2 x Cr, Cb and 0 x? Fortunately not! 4:2:0 is the non-intuitive notation for half-luma-rate sampling of color in both the horizontal and vertical dimensions. Chroma is sampled 360 times per line, but only on every other line of each field. The theory here is that by evenly subsampling chroma in both H and V dimensions, you get a better image than the seemingly unbalanced 4:1:1, where the vertical color resolution appears to be four times the horizontal color resolution. Alas, it is not so: while 4:2:0 works well with PAL and SECAM color encoding and broadcasting, interlace already diminish vertical resolution, and the heavy filtering needed to properly process 4:2:0 images causes noticeable losses; sa result, multi-generation work work in 4:2:0 is much more visible subject to degradation than multi-generation in 4:1:1.
Antwort von StefanS:
"Hugo" wrote:
So does 4:2:0 (PAL DV, DVD where, main-profile MPEG-2) fit in? 4 x Y, 2 x Cr, Cb and 0 x? Fortunately not! 4:2:0 is the non-intuitive notation for half-luma-rate sampling of color in both the horizontal and vertical dimensions. Chroma is sampled 360 times per line, but only on every other line of each field. The theory here is that by evenly subsampling chroma in both H and V dimensions, you get a better image than the seemingly unbalanced 4:1:1, where the vertical color resolution appears to be four times the horizontal color resolution. Alas, it is not so: while 4:2:0 works well with PAL and SECAM color encoding and broadcasting, interlace already diminish vertical resolution, and the heavy filtering needed to properly process 4:2:0 images causes noticeable losses; sa result, multi-generation work work in 4:2:0 is much more visible subject to degradation than multi-generation in 4:1:1.
