Dear Gents,
I would like to bring this topic back.
I have some philosophic question.
For instance I have set electronic shutter by 1/50 on my CCTV camera with PAL video output. Full interlaced frame should by rendered for each 40 miliseconds (25hz period).
My CCD imager is exposed for 20 miliseconds by a light (1/50 shutter period).There is additional processing delay (readout from H&V registers, DSP processing, A/D conversion, etc.) on videochain between imager and PAL coding circuit hopefully shorter then remaing 20 miliseconds.
Then new frame from imager should be ready in memory before rendering of new frame (probably at Vertical blanking period??)
My question is at what time starts opening shutter related to videosignal timing?? Is there any relation? Does it make sense such detection from videosignal a such?
If not so does anybody have idea from what point indside or ouside camera can I detect exactly electronic shutter opening? I think CCD chip does not have any control electronic shutter pin.
Thanks
BR
Andy
