"glen herrmannsfeldt" wrote ...> Richard Crowley wrote: > > (snip) > >> When it comes right down to it, ALL analog video is AC >> coupled. Through many stages of electronics, to be sure, >> but even if all the electronics were DC coupled, the trip >> through the air (or written to and read back from a tape) >> is AC coupled. > > On tape, luminance is usually an FM signal, which could be > considered to preserve DC. (If you are careful with the > calibration.)Right. But even professional equipment relied on downstream DC restoration and/or clamping rather than absolute accuracy of the FM calibration.
Why is video inverted for transmission?
Started by ●September 19, 2007
Reply by ●September 20, 20072007-09-20
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
Reply by ●September 20, 20072007-09-20
"Mark" <makolber@yahoo.com> wrote in message news:1190316861.873947.152340@r29g2000hsg.googlegroups.com...> Some distant day in the US is Feb 17, 2009.Looks like it's really going to happen this time too -- all the analog TV boxes now have the, "Warning! This TV will stop receiving over-the-air broadcast in 2009!" stickers on them these days.
