Trying to translate this terminology into normal Aussie speak here. :P So a “heat pump” is reverse cycle aircon, I’m guessing it’s usually a central unit ducted

Trying to translate this terminology into normal Aussie speak here. :P So a “heat pump” is reverse cycle aircon, I’m guessing it’s usually a central unit ducted to each room? Am I right in thinking that “mini split” is what we’d call a “split system” (ie. wall unit inside, heat exchanger outside, refrigerant pipes running between)? Is there a power cutoff above which it’s no longer mini, or is anything non-ducted a mini split?