Marhendaer
Newbie level 1
Hello,
I am building a camera with CCD sensor, and here are some things I don’t understand:
CCDs I saw have more line than the lines used for their dedicated format: 492 or 494 active lines for CCDs labelled NTSC (480 displayed lines). And it is the same for PAL (582 active CCD lines versus 576 displayed).
How this is usually dealt with?
For smaller CCDs (360H*240H for example) is the image displayed only on a windowed screen? If not, how is built the displayed image? (keeping the same line twice doesn’t work since with interlaced frames it would look strange)
With small CCDs, what happens if the timing generator request the number of pixels/lines of a PAL/NTSC frame when there are fewer in the CCD? Does it outputs optical black or does it mess up with the CCD?
Thanks,
I am building a camera with CCD sensor, and here are some things I don’t understand:
CCDs I saw have more line than the lines used for their dedicated format: 492 or 494 active lines for CCDs labelled NTSC (480 displayed lines). And it is the same for PAL (582 active CCD lines versus 576 displayed).
How this is usually dealt with?
For smaller CCDs (360H*240H for example) is the image displayed only on a windowed screen? If not, how is built the displayed image? (keeping the same line twice doesn’t work since with interlaced frames it would look strange)
With small CCDs, what happens if the timing generator request the number of pixels/lines of a PAL/NTSC frame when there are fewer in the CCD? Does it outputs optical black or does it mess up with the CCD?
Thanks,
