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Timecode calculator 25fps12/27/2022 ![]() The only difference today is the frame rate as HD is universally ether 720p at 50 or 60 or 1080i at ether 25fps or 30fps oh and across the world different systems are used to get the content to us, as in DVB as in Europe or ATSC as used in America. But what the differences are today though, on LED HD-ready TVs, I have no idea. I remember thinking that it was weird that the USA is usually the leader of the game in terms of technology, but their TV pictures were of noticeably inferior resolution than ours. I remember watching TV in the USA, back in the 90's (ie, on standard definition CRT tube TVs) and the horizontal scan-lines were definitely more noticeable (as there were fewer of them than on our PAL TVs). The biggest plus side would be film transferring, as that would have stayed at 24fps as used by the film industry for years. Then UHD could have been agreed to be say 72fps or 96fps and everyone would have been happy. When HD came along if 24fps had already been commonplace for SD digital, then HD would have been the same, although nobody would have bothered with converting it to 25fps or 30fps as HDTVs would have just handed that frame rate from the start.Īlso all digital SD over HDMI would have been output at 24fps so ending that different forever. It is easy to speed up to 25fps or do 2/3pulldown to make 30fps from 24fps as that's been done for years. The same with DVD players, have the content of the disk as 24fps then output at 25 or 30fps from the player. I'm sure that it wouldn't have taken much to get the receiver box to output ether 25fps or 30fps at the end users home. Its a shame that broadcasting didn't say switch to 24fps for all digital output when digital came into existence. I've read some stories by people who had to try and recover NTSC recordings that make it sound like an utter nightmare to keep colour consistency between different generations, makes, or even individual recorders and transmission/receivers (IIRC it was much more susceptible to the colour information being degraded/lost). ![]() I think the bigger difference was in the carrier systems used for colour, and the resolutions. The reason is due to differing electrical systems in the UK the frequency of AC is 50Hz, n the USA it is 60Hz.ĥ0 or 60fps would have been excessive though, so using some simple circuitry you can use the AC frequency as the basis of a timing circuit and half it to come up with the frame rate we use today.Īye, from what I recall of my reading on the matter using the mains frequency was quite a good way to deal with a lot of technical issues back before IC's, without increasing the costs and size of the receivers significantly, and decreasing reliability. The number of frames per second was not about quality. ![]()
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