A monitoring apparatus connected to a TV set selects, from a plurality of internal sources, such as VHF/UHF and BS tuners and built in said TV, and a plurality of external sources connected to the TV set from the outside thereof, such as a CATV tuner and a VCR, the source of video currently displayed...http://www.google.es/patents/US6487719?utm_source=gb-gplus-sharePatente US6487719 - Method and apparatus for monitoring TV channel selecting status
Method and apparatus for monitoring TV channel selecting status
