Just to be sure...

[jpsdr]

I just realised i may have misunderstood something...
1080i60 means :
a : 60 frames/seconds so 120 fields/seconds.
b : 60 fields/seconds so 30 frames/seconds.

In case of a, it means that 1080i60 is out of spec level 4.1, but in case of b it's not.
For me it's a, but, suddenly, i have doubts... (Yes, i know, there is days like this sometimes...).

[sneaker_ger]

There isn't really a consensus. Some people say 1080i60, others say 1080i30, but most of the time they both actually mean the same, i.e. 60 fields per second.

[Groucho2004]

There isn't really a consensus.
Indeed. See also here (http://en.wikipedia.org/wiki/1080i).

[jpsdr]

Ok, thanks for the quick answers and clarifications. It means 1080i50 or 1080i60 is not out spec for L4.1.

[nm]

Ok, thanks for the quick answers and clarifications. It means 1080i50 or 1080i60 is not out spec for L4.1.

Yep, they fit in L4.1. There are lots of Blu-ray releases with 1080i50 and 1080i60 content.