The CaloIdCnv package contains the converters which are necessary to initialize the Calorimeter helpers and identifier managers.
There is one converter per helper or manager.
And there are 3 LAr offline helpers, 2 Tile offline helpers, 3 Calo-wide offline helpers, 1 Trigger Tower online helper and 1 id manager.
TileTBID helper is a bit special - it is not used for normal calorimeter cells, but used for MBTS cells in full ATLAS reconstruction as well as for ancillary detectors at the testbeam (like Muon Wall or beam chambers)