Cryptography – Video cryptography – Video electric signal modification
Reexamination Certificate
2008-03-25
2008-03-25
Barron, Gilberto (Department: 2132)
Cryptography
Video cryptography
Video electric signal modification
C705S052000, C705S077000
Reexamination Certificate
active
07349541
ABSTRACT:
A method and apparatus is provided in which playable content is transmitted in response to a playable-content request; a key for the playable content is separately transmitted in response to a key request. Quality information about the playable content is used to generate tariff information from which a user charge is derived.
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Barron Gilberto
Herring Virgil
Hewlett--Packard Development Company, L.P.
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