[QUOTE=randomagain;2351749]mini DV tape is industry standard for filming, now High Def/ “betacam” is creeping in, some digital cameras
they still use tape for practical reasons
I was at a film house a while back so it may have changed but I doubt it[/QUOTE]
Mini DV tape is DEFINITELY not the industry standard for filming. And it’s like any kind of support, there is no specific format associated with it (you can put DV but also HD on a mini DV tape)
The tapes used in loads and loads of tv stations were the Betacam (then Betacam SP, and Digital Betacams are still widespread) the first betacam was already VHS on steroids. Today most big tv stations have moved to full digital production with many, many proprietary formats (as mentioned by Phenex) which most of the time involve loads of metadata (easier to index). My guess would be that they store uncompressed or lossless data digitally. They broadcast compressed digital signal (DTV, digital television), most of the times in mpeg2 (the DVD format).
Broadcasters may (and often do) combine many lower resolution data casts to their DTV signal (be it video, audio, or data).
For analog (old =) ) TV, compression is in the signal (this is where you get PAL NTSC etc…)
