Device and method for preventing unauthorized reproduction of content
AssigneeNEC Corporation
InventorsTatsuya Shiragaki, Yasuhiro Miyao
Life of this patent
Estimating the term…
Abstract
A device for reproducing a content having at least one reproduction start time predetermined, includes: a non-real time receiver for receiving a content in non-real time; a scheduler for scheduling reception of a content whose delivery method is non-real time delivery by the non-real time receiver based on a current time and a reproduction start time of the content; a content storage section for storing at least one content received by the non-real time receiver; and a reproduction controller for inhibiting reproduction of a content stored in the content storage section before the reproduction start time of the content.
Claims18
A device for reproducing a content having at least one reproduction start time predetermined, comprising:
- a non-real time receiver for receiving a content in non-real time;
- a scheduler for scheduling reception of a content whose delivery method is non-real time delivery by the non-real time receiver based on a current time and a reproduction start time of the content;
- a content storage section for storing at least one content received by the non-real time receiver;
- and
- a reproduction controller for inhibiting reproduction of a content stored in the content storage section before the reproduction start time of the content,
- wherein the reproduction controller calibrates a clock to be referenced according to information received from an external time-and-day reference station,
- wherein the information received from the external time-and-day reference station is previously encrypted according to an encryption key, wherein the reproduction controller uses a decryption key corresponding to the encryption key to decrypt the information.
A method for preventing unauthorized reproduction of a content having at least one reproduction start time predetermined, comprising:
- scheduling reception of a content whose delivery method is non-real time delivery by the non-real time receiver based on a current time and a reproduction start time of the content;
- storing at least one content received by the non-real time receiver in a content storage section;
- and
- inhibiting reproduction of a content stored in the content storage section before the reproduction start time of the content,
- wherein a clock to be referenced is calibrated according to information received from an external time-and-day reference station,
- wherein the information received from the external time-and-day reference station is previously encrypted according to an encryption key, wherein a decryption key corresponding to the encryption key is used to decrypt the information.
A non-transitory recording medium recording a computer program which instructs a computer to function as a device for reproducing a content having at least one reproduction start time predetermined, comprising:
- scheduling reception of a content whose delivery method is non-real time delivery by the non-real time receiver based on a current time and a reproduction start time of the content;
- storing at least one content received by the non-real time receiver in a content storage section;
- and
- inhibiting reproduction of a content stored in the content storage section before the reproduction start time of the content,
- wherein a clock to be referenced is calibrated according to information received from an external time-and-day reference station,
- wherein the information received from the external time-and-day reference station is previously encrypted according to an encryption key, wherein a decryption key corresponding the encryption key is used to decrypt the information.
Dependencies are inferred from the claim text.