Video-signal output apparatus and video-signal input apparatus

Details Video-signal output apparatus and video-signal input apparatus Video-signal output apparatus and video-signal input apparatus

2005-02-22

2005-02-22

Sheikh, Ayaz (Department: 2131)

Cryptography

Video cryptography

Video electric signal modification

C380S215000, C348S630000

Reexamination Certificate

active

06859536

ABSTRACT:
A video-signal output apparatus performs scrambling, and a video-signal input apparatus performs descrambling. The scrambling and the descrambling are performed so that signal lines are shifted for each period corresponding to one horizontal scanning interval of analog component video signals which corresponds to a horizontal scanning period or for each period which is n times one horizontal scanning period (where n represents a natural number not less than 2). The signal lines are also shifted with timing in a horizontal blanking period of the analog component video signals. When authorization is established as a result of mutual communication between the output apparatus and the input apparatus, scramble and descramble patterns each are determined based on mutually obtained information in the mutual communication.

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