Digital broadcast receiving apparatus

Details Digital broadcast receiving apparatus Digital broadcast receiving apparatus

2011-07-19

2011-07-19

Hirl, Joseph P (Department: 2426)

Interactive video distribution systems

Access control or blocking

With encryption or scrambling of video signal

C725S025000, C725S027000, C380S210000

Reexamination Certificate

active

07984464

ABSTRACT:
A digital broadcast receiving apparatus, includes: a channel information memory unit which stores the physical channel, a virtual channel, the sub channels, and scrambling information which indicates whether the sub channels are scrambled or not so as to refer the scrambling information to the sub channels; a scrambling judgment unit which judges whether the broadcast data of the sub channels, which is scanned by the scanning unit is scrambled or not; a memory control unit which stores a judgment result obtained by the scrambling judgment unit in the channel information memory unit as the scrambling information; and an updating program which updates the scrambling information in the channel information memory unit by executing the scanning unit, the scrambling judgment unit, and the memory control unit at the predetermined timing; and wherein when the judgment result obtained by the scrambling judgment unit indicates that all of the sub channels in the physical channel are scrambled, the memory control unit stores information that the physical channel is a channel which needs to be scanned when the scrambling information is updated by the updating unit.

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patent: 2005-151333 (2005-06-01), None
patent: WO 99/03268 (1999-01-01), None

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