A CATV channel assignment system and method for arranging CATV channels in a tiered fashion facilitates selective viewer access to predetermined groups of CATV channels. A "logical" channel number is generated upon channel selection and is provided to a microcomputer which, in turn, generates a corresponding...http://www.google.fr/patents/US4527194?utm_source=gb-gplus-shareBrevet US4527194 - Channel assignment for CATV system
