Early color TV in Italy

[firenzeprima]

I do not think we protectionist is a problem because the market for radio receivers, and various household appliances was also open to American equipment. Here in Europe evaluated the NTSC system that had many flaws and imperfections decided to improve it, opening a technological war between France and Germany. In fact, the PAL and SECAM systems are derived directly from NTSC but not identical because of patents. In Italy in the'70s Indesit ISA developed the system significantly improved at all another, but out of time and impossible to enforce.

[dtuomi]

Originally Posted by firenzeprima

I do not think we protectionist is a problem because the market for radio receivers, and various household appliances was also open to American equipment. Here in Europe evaluated the NTSC system that had many flaws and imperfections decided to improve it, opening a technological war between France and Germany. In fact, the PAL and SECAM systems are derived directly from NTSC but not identical because of patents. In Italy in the'70s Indesit ISA developed the system significantly improved at all another, but out of time and impossible to enforce.

You speak of NTSC's many flaws and imperfections. We had already been discussing the phase issues of NTSC and that being one of the primary reasons for the rise of SECAM and PAL. I'm curious about what were the other flaws and imperfections that you are referring to.

David

[firenzeprima]

Originally Posted by dtuomi

You speak of NTSC's many flaws and imperfections. We had already been discussing the phase issues of NTSC and that being one of the primary reasons for the rise of SECAM and PAL. I'm curious about what were the other flaws and imperfections that you are referring to.

David

Sure, apart from the annoying phase change of images, the icon NTSC if you use red or yellow saturated colors can "colarer" on your TV, mingle with other colors or tremolite even if your TV is fully functional.

[Telecolor 3007]

In Romania we had color television only in 1983 because of Ceauşescu (the first color experiments took place in 1964, in N.T.S.C. and SECAM, but when the Party heard how much SECAM color television costs they order the experimental equypment to be dismentle); they sayed in a book around 1969 or 1975 that in Romania will soon be color tv.

Going to mobile (cellular) telephony, C.D.M.A 2000 is used in Romania, but, belive or not, the signal around here haves lower qualty than G.S.M.

The bastard politicians signed the Geneva Agreement on frequencyes allocation.
So no more F.M. broadcasting on 65-73 M.Hz.

[old_tv_nut]

Originally Posted by firenzeprima

Sure, apart from the annoying phase change of images, the icon NTSC if you use red or yellow saturated colors can "colarer" on your TV, mingle with other colors or tremolite even if your TV is fully functional.

I had to look up a translation for "colarer" = I think it means "smear" in English; and tremolite" means "flicker"?

If this translation is correct, I must point out that these possible defects are present in all analog color TV systems alike, not only in NTSC, and come from various common causes such as the limited bandwidth of the chroma signals and crosstalk between chroma and luma.

[dtuomi]

Originally Posted by firenzeprima

Sure, apart from the annoying phase change of images, the icon NTSC if you use red or yellow saturated colors can "colarer" on your TV, mingle with other colors or tremolite even if your TV is fully functional.

I sort of had to figure out your definitions there. Unfortunately, I have to disagree, any television system can develop these faults because they're frequently due to limitations in the broadcast chain or problems within the receiving set itself. NTSC does not inherently have any more difficulty than any other system with saturation problems.

Originally Posted by ceebee23

NTSC is not capable of producing a true RGB signal ...because of the weighting of the I and Q signals but both PAL and SECAM contain the full RGB components BUT of course an NTSC style system for 625/25 could be set up to provide true RGB ....but the phase issue was seen as a major problem...

In fact NTSC has superior transmission characteristics for long distance cable/microwave transmission than either SECAM or PAL.

NTSC has no problems decoding to RGB. There has been over the years some disagreement on implementations of color decoding in NTSC. 3 different revisions if memory serves. The latest one was in the 80's and dealt with modern phosphors on TV sets. Current NTSC broadcast chains should decode correctly for modern TV's.

Originally Posted by old_tv_nut

That's an interesting statement. In what way is NTSC superior for long distance cable and microwave? I would think PAL to be superior due to the phase distortions that could accumulate in multiple-stage video links.

It might be a true statement, although I haven't read anything that would confirm or deny it. NTSC does tend to be easier to impliment in closed circuit situations. The signaling is simpler, and some of the timings less critical. Since long distance cables, either copper or fiber optic, use FM modulation to transport the signal its feasible that NTSC might be easier to deal with. And using the FM modulation scheme means there are no phase issues, which is the real reason why PAL was developed to begin with. Still I haven't read anything definitive on if that's true or not.

David