Global transmissions

[AngusMacGyver]

Hi, Guys!
I'm just curious.
I was thinking about global transmissions like football (soccer), F1, Olimpic Games, etc...
Wich is the format (resolution, framerate, standard) used? Is the signal converted in each country?

Thanks in advance.

[txpharoah]

Digital? Cable? Broadcast? From what country?

There are tons of formats. If you are curious about one in particular, I'd answer, but you're asking for a novel. Really.

Each take the transmission of raw information and dumps it into the needed format, usually on-the-fly.

[AngusMacGyver]

Acctually, I'm curious in how broadcasters can change fps on the fly, per example.

To convert a 25 to a 29.97 fps video, it is necessary to slow it down to 24 fps progressive and telecine it. Right?
How can they do this on the fly?

Maybe I'm wrong in my analisys.

[WeedVender]

I know that Broadcast and satelite is 720x480, satelite uses MPEG2 compression. I dunno which compression is used in broadcast though..

[EddyH]

Living in a PAL country, and having seen a few of these worldwide things recently due to either cultural (skipping past and having eye caught by an edition of "Reborn in the USA") or political (an edition of Question Time from Abu Dhabi rather than London, to do with Iraq).... I would say that for whatever reason, broadcasters choose NTSC for global purposes. The resolution and colour fidelity took a definate bashing, and there was the slight roughness of movement from the frame conversion.

Quite why, I don't understand. Both were from fairly large British TV companies that shouldn't have had any trouble supplying their own PAL equipment to make the programs with I would suspect American companies etc would be even more inclined to use their native formats.

The only hope I see to stop it taking over the whole world is the increasing use of HDTV. Many TV series come over here now from America and I guess they must have been HD originally (Friends, 24, BoB, Frasier..?) as the telltale softness and odd colouring is replaced by sharp resolution and good colour, though motion is still sometimes slightly off (even that is usually good though, being converted from 60fps instead of 30 interlace)

[BJ_M]

they use products like this http://www.snellwilcox.com/productguide/framesets/standards.html

if you have to ask the price - your not even in the ballpark for owning one .

yes - i hate seeing a lot of stuff broadcast which is mixed HD and SD and film , looks bad as it keeps switching , do they think no one cares ?