Patent Number: 7,085,381

Title: Data multiplexing device, program distribution system, program transmission system, pay broadcast system, program transmission method, conditional access system, and data reception device

Abstract: In a data multiplexing device which multiplexes and transmits the transport stream packets of program data consisting of a plurality of data elements constructed in the form of transport stream packets, a program distribution system, a program transmission system, a pay broadcast system, a program transmission method, a conditional access system, and a data reception device according to the present invention, by generating a scramble key Ks corresponding to one or more data elements among the plurality of data elements constituting a program and by scrambling each data element, an audience can subscribe for each data element.

Inventors: Kubota; Tatsuya (Kanagawa, JP), Wakatsuki; Norio (Kanagawa, JP)

Assignee: Sony Corporation

International Classification: H04N 7/167 (20060101); H04N 7/173 (20060101)

Expiration Date: 8/01/02018