AV data transmission and reception scheme for realizing copyright protection
AssigneeKabushiki Kaisha Toshiba
InventorsTakeshi Saito, Hiroshi Isozaki, Takashi Kokubo, Taku Kato
Life of this patent
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Abstract
An AV stream in which the protocol type and the value of the payload type to be used by this protocol are attached to the payload in which the AV data that requires the copyright protection is encrypted is transmitted from a transmission device to a reception device, so that the reception device that received this AV stream can easily detect that the AV data is encrypted, and easily identify the data for which the authentication and key exchange is necessary, and it becomes possible to receive and reproduce the AV data easily and quickly, while realizing the copyright protection.
Claims18
A transmission device, comprising:
- a transmission control unit configured to control a transmission of a packet that requires a copyright protection which contains an encrypted electronic data, a copyright protection control data, and an RTP (Real-time Transport Protocol) header including a value of a dynamic payload type that indicates information regarding a state of the encrypted electronic data;
- a negotiation unit configured to carry out a negotiation to determine the value of the dynamic payload type for each communication in advance, with a reception device;
- and
- an authentication and key exchange processing unit configured to carry out an authentication and key exchange processing for purpose of the copyright protection, with the reception device.
A reception device, comprising:
- a reception control unit configured to control a reception of a packet containing an encrypted electronic data, a copyright protection control data, and an RTP (Real-time Transport Protocol) header including a value of a dynamic payload type that indicates information regarding a state of the encrypted electronic data;
- a negotiation unit configured to carry out a negotiation to determine the value of the dynamic payload type for each communication in advance, with a transmission device;
- and
- an authentication and key exchange processing unit configured to carry out an authentication and key exchange processing for purpose of a copyright protection, with the transmission device.
A computer program product for causing a computer to function as a transmission device, the computer program product comprising:
- a first computer program code for causing the computer to control a transmission of a packet that requires a copyright protection which contains an encrypted electronic data, a copyright protection control data, and an RTP (Real-time Transport Protocol) header including a value of a dynamic payload type that indicates information regarding a state of the encrypted electronic data;
- a second computer program code for causing the computer to carry out a negotiation to determine the value of the dynamic payload type for each communication in advance, with a reception device;
- and
- a third computer program code for causing the computer to carry out an authentication and key exchange processing for purpose of the copyright protection, with the reception device.
A computer program product for causing a computer to function as a reception device, the computer program product comprising:
- a first computer program code for causing the computer to control a reception of a packet containing an encrypted electronic data, a copyright protection control data, and an RTP (Real-time Transport Protocol) header including a value of a dynamic payload type that indicates information regarding a state of the encrypted electronic data;
- a second computer program code for causing the computer to carry out a negotiation to determine the value of the dynamic payload type for each communication in advance, with a transmission device;
- and
- a third computer program code for causing the computer to carry out an authentication and key exchange processing for purpose of a copyright protection, with the transmission device.
Dependencies are inferred from the claim text.