Content protection processing method

Abstract

To provide a digital broadcast receiver capable of performing more value-added functions. [Solution] The system comprises a broadcast receiving unit capable of receiving digital broadcast content and control information relating to content protection of said content; a storage unit for storing the content received by the broadcast receiving unit; a video output unit for outputting video of the content received by the broadcast receiving unit or the content stored in the storage unit to an external device; an interface for copying or moving the content stored in the storage unit to an external device; and a control unit. Depending on the control state of the storage unit, video output unit, and interface controlled by the control unit, the control unit controls content protection processing based on control information relating to content protection.

Claims

[Claim 1] A content protection processing method in a transmission system including a broadcast receiving device that receives broadcast program content transmitted by broadcast signals from a broadcasting station, In the aforementioned transmission system, a transmission step is performed in which a broadcast signal is transmitted from the broadcasting station to the broadcasting receiving device, A receiving step in which the broadcast signal transmitted in the transmission step is received by a tuner in the broadcast receiving device, A demodulation step which involves demodulating the broadcast signal received in the reception step to obtain the broadcast program content, A storage step for storing the broadcast program content demodulated in the demodulation step, A video output processing step which outputs the video of the broadcast program content stored in the storage step via an interface different from the tuner that receives the broadcast signal in the reception step, A copy processing step involves copying the broadcast program content stored in the storage step via an interface different from the tuner that receives the broadcast signal in the reception step, A move processing step which performs move processing on the broadcast program content stored in the storage step via an interface different from the tuner that receives the broadcast signal in the reception step, Equipped with, When the broadcast program content is content transmitted from the broadcasting station via the broadcast signal with protection that allows for a predetermined number of copies, the storage step stores the broadcast program content in a state where it can be copied nine times and moved once, and is encrypted so that it can be played back only by the broadcast receiving device. With respect to content transmitted from the broadcasting station via the broadcast signal while the broadcast program content is protected to allow copying a predetermined number of times, the content protection process when moving the broadcast program content stored in the storage step in the move processing step includes multiple different levels of content protection, such as content protection processing by DTCP-IP and content protection processing by DTCP2. The storage in the storage step can be performed in a storage unit located at the output destination of the IP interface, via an IP interface composed of Ethernet-compatible hardware provided in the broadcast receiving device. Even when the broadcast program content is transmitted from the broadcasting station via the broadcast signal with protection allowing a predetermined number of copies specified, and when different levels of content protection processing are performed on the content stored in the storage step, it is possible to perform a common content protection process without the need for different levels of content protection processing in the storage step for the content that is subject to the different levels of content protection processing in the move processing step. Content protection processing method.

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