Moderators: Dave Moll, Andrew Davie, Steve Anderson
With an overlapping scanning frame sequence, wherein the even frame lines overlap the odd frame lines by 1/2 line, a 48 line system may equal or exceed the resolution of the displayed 60 pictures. Assuming that the Kell factor is the ordinary value of 0.7, the 60 line picture would have an effective vertical resolution of 42 pixels. Overlapping scanning frames should push up the Kell factor to about 0.9, giving an effective vertical resolution of about 43 pixels, better than the 60 line picture with less bandwidth.Steve Anderson wrote:48 lines...neatly fits into the bandwidth of 48kHz wave files and even an audio CD. But although Volkers pictures show what an improvement it is, just a 50% increase doesn't quite satisfy me.
60 lines...now we're getting serious, but unless using 96kHz sampling on a sound card most simple storage methods are non-starters.
This is very good, Steve. I agree: We don't need no stinkin' sync pulses!Steve Anderson wrote:This is real video and it can be seen the the entire gamat of the 256 8-bit levels for the video is being used with black level reference between lines. This is akin to JLB who didn't use any sync pulses either.
Stephen wrote:We don't need no stinkin' sync pulses!
Klaas Robers wrote:However the time burst occupies one complete line. One out of 32, that remains only 31 lines.
Nowadays we need no sync pulses any way. If you synchronise your display to an atomic clock then it is kept in sync for hours. Even the blanking is not needed. why not to start a new frame at the exact start of a second? GPS provides that information. So I don't see the need of the 24 kHz burst.
Klaas Robers wrote:Oh Steve, a Nixie Clock. Why are people alway doing the same things? What you see on the foreground is a VLF receiver that receives the time encoded......
Klaas Robers wrote:Nowadays we need no sync pulses any way.
Steve Anderson wrote:This will be a sync-less system, no sync pulses, in todays world, they're not needed.
Stephen wrote:We don't need no stinkin' sync pulses!
Stephen wrote:We don't need no stinkin' sync pulses!
Viewmaster wrote:I for one would not wish to see part of TV history omitted, especially on NBTV. Why the ol' sync pulse is as much of historic TV.....So long live my historic sync pulse, warts and all. Albert.
Viewmaster wrote:...as much of historic TV as eggs are to "Egg, sausage and chips" here in UK.
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