US 2008/0168488 A1 · Content Protection System

Abstract

The digital broadcast receiver 1 comprises: a signal input unit 10 for receiving a received broadcast wave; a demodulation unit 11 for demodulating the broadcast wave; an external module 12; an external module I/F (Interface) 13 for connecting the receiver 1 to the external module 12; a decoding unit 14 for extracting necessary information containing a target content from the received signal; an output unit 15 for outputting actual video/audio; a control unit 16 for controlling the entire receiver 1; and a user I/F 17 for transmitting and receiving information to/from a user. Further, there are provided: a packet processing unit 101 that is located between the demodulation unit 11 and the external module I/F 13, that monitors all the packets contained in a TS, and that performs a predetermined processing on packets matched with a predetermined condition; and a TS selector 102 that is located between the external module I/F 13 and a bus line BL and that selects and outputs one designated TS of the two TSs. In this way, non-encrypted contents can be protected with ease when the TS outputted to the external module is accessed in an unauthorized way.

Claims20

Dependent claims

A content receiving apparatus for outputting to the outside at least part of a content composed of digital data inputted from the outside, the apparatus comprising:

means for determining at least part of attribute information of the digital data;
means for invalidating identification information about the digital data;
and
means for invalidating identification information about the digital data having attribute information matched with a designated condition before an output is produced to the outside.

1 more element

A method for outputting a content, comprising the steps of:

demodulating a content composed of received digital data;
invalidating packets matched with a predetermined condition among packets contained in demodulated data on which demodulation processing is performed;
outputting the demodulated data to an external module that decodes only encrypted contents;
determining whether or not a target content is contained in the invalidated packets;
obtaining the demodulated data in a pass-through manner not via the external module in cases in which the target content is contained in the invalidated packets, and obtaining an output from the external module in cases in which the target content is not contained;
and
extracting the target content from the obtained demodulated data and outputting the target content.

4 more elements

Dependencies are inferred from the claim text.

Content Protection System

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Content Protection System

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Abstract

Claims20