Patent ID: 7035363
Filing Date: 2006-04-25
Classification: H04N

Abstract:
1. An information signal transmission apparatus of transmitting a primary information signal from a first electronic device to a second electronic device acting as a sender in a system via a transmission line connected between an analog output terminal of said first electronic device acting as a receiver in the system and an analog input terminal of said second electronic device, said apparatus being characterized in that: said second electronic device supplies, in the form of an electronic signal, device information associated with said second electronic device over said information signal transmission line; and said first electronic device does not output said primary information signal, when said device information received via said transmission line indicates that said second electronic device is in a recording mode and when copy management information attached to said primary information signal indicates that copying is prohibited, wherein when said device information indicates a transition into a recording mode and when said copy management information attached to said primary information signal indicates copying is permitted only for a first generation copy, said first electronic device rewrites said copy management information so as to indicate copying is prohibited and outputs said primary information signal together with said rewritten copy management information attached thereto.