Copy protection using detailed copy control information

Details Copy protection using detailed copy control information Copy protection using detailed copy control information

2005-12-20

2005-12-20

Sheikh, Ayaz (Department: 2131)

Electrical computers and digital processing systems: support

Data processing protection using cryptography

By stored data protection

C713S165000, C713S152000, C713S152000, C380S201000, C380S203000, C380S231000, C380S237000, C705S051000, C705S052000, C705S057000

Reexamination Certificate

active

06978377

ABSTRACT:
Based on the detailed reproduction control information defining the reproduction control state of data to be transmitted, the CPU12of the data transmission apparatus creates a simplified reproduction control information roughly defining the reproduction control state of the data, stores the simplified reproduction control information of the data in the packet header of a data packet carrying the data, stores the detailed reproduction control information in the data, and transmits the simplified reproduction control information and the detailed reproduction control information as well as the data to the data receiving apparatus20through the transmission channel30from the input-output interface16. The CPU22of the data receiving apparatus20analyses the reproduction control state of the data contained in the data packet based on the simplified reproduction information and the detailed reproduction information contained in the data packet, and controls the reproduction of the data by the action of the media access part26according to the analysis result.

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