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.

 
Web www.patentalert.com

< Method of fixing color wheel to motor

< Data processing device and data recording method

> Portable virtual reality

> Pattern inspecting apparatus and method

~ 00289