Electronic device and method of transmitting content item

• US 9,742,741 B2
• Filed: 07/08/2016
• Issued: 08/22/2017
• Est. Priority Date: 08/31/2011
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Hirayama, Noriyuki, Kokubo, Takashi
• Primary Examiner(s): ZHAO, DON GORDON
• Application Number:
  US15/205,364
• Publication Number:
  US 20160323252A1
• Time in Patent Office: 410 Days
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: H04L 2209/24 Key scheduling, i.e. generating round keys or sub-keys for block encryption
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 9/30 Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/2541 Rights Management protecting software against unauthorised usage in a vending or licensing environment G06F21/10; security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/4367 Establishing a secure communication between the client and a peripheral device or smart card
• CPC Class Codes: H04N 21/4408 involving video stream encryption, e.g. re-encrypting a decrypted video stream for redistribution in a home network
• CPC Class Codes: H04N 21/4627 Rights management associated to the content security in data switching network management H04L41/28; security management or policies for network security H04L63/20; access security in wireless networks H04W12/08
• CPC Class Codes: H04N 21/835 Generation of protective data, e.g. certificates protecting software against unauthorised usage in a vending or licensing environment G06F21/10

Abstract

According to one embodiment, an electronic device includes a content transmitter. The content transmitter is configured to output a content item including first data and second data to one transmission path, by applying a first copyright protection system to copyright protection of the first data and applying a second copyright protection system to copyright protection of the second data. The first copyright protection system involves encryption of data to be copyright-protected. The second copyright protection system involves no encryption of data to be copyright-protected.

Claims

1. A system comprising a first electronic apparatus and a second electronic apparatus, both the first electronic apparatus and the second electronic apparatus supporting a high-bandwidth digital content protection (HDCP), the system comprising:

the first electronic apparatus configured to;

establish a key of the HDCP with the second electronic apparatus;

encrypt video data to generate encrypted video data according to the HDCP, wherein audio data is not encrypted according to the HDCP;

multiplex the encrypted video data and the audio data to generate multiplexed data, wherein the multiplexed data comprises a descriptor indicating that the multiplexed data is protected according to the HDCP; and

transmit, over a wireless, a stream of the multiplexed data to the second electronic apparatus according to a real-time transport protocol (RTP); and

;

the second electronic apparatus configured to;

receive, over the wireless, the stream of the multiplexed data according to the RTP from the first electronic apparatus;

decrypt the encrypted video data; and

handle the audio data as never copy to prohibit copying of the audio data, when the descriptor indicating the multiplexed data is protected according to the HDCP.

2. An electronic apparatus for transmitting a protected content comprising video data and audio data to a first electronic apparatus, the electronic apparatus supporting a high-bandwidth digital content protection (HDCP), the electronic apparatus comprising:

one or more hardware processors configured to;

establish a key of the HDCP with the first electronic apparatus supporting the HDCP;

encrypt the video data to generate encrypted video data according to the HDCP, wherein the audio data is not encrypted according to the HDCP; and

multiplex the encrypted video data and the audio data to generate multiplexed data, wherein the multiplexed data comprises a descriptor indicating that the multiplexed data is protected according to the HDCP, and the audio data is handled as never copy to prohibit copying of the audio data by the first electronic apparatus; and

a transmitter configured to transmit, over a wireless, a stream of the multiplexed data to the first electronic apparatus according to a real-time transport protocol (RTP).

3. The electronic apparatus of claim 2, wherein the one or more hardware processors are further configured to:

encode video of the protected content to the video data; and

encode audio of the protected content to generate the audio data.

4. The electronic apparatus of claim 2, wherein the HDCP comprises at least HDCP 2.0 and later versions of HDCP 2.0.

5. The electronic apparatus of claim 2, further comprising:

a display configured to display video generated based on the video data; and

a speaker configured to output audio generated based on the audio data.

6. An electronic apparatus supporting a high-bandwidth digital content protection (HDCP), the electronic apparatus comprising:

a receiver configured to receive, over a wireless, a stream of multiplexed data according to a real-time transport protocol (RTP) from a first electronic apparatus, wherein the multiplexed data comprises encrypted video data and audio data of a protected content, the encrypted video data is encrypted according to the HDCP, the audio data is not encrypted according to the HDCP, and the multiplexed data comprises a descriptor indicating whether the multiplexed data is protected according to the HDCP; and

one or more hardware processors configured to;

decrypt the encrypted video data to generate video data; and

handle the audio data as never copy to prohibit copying of the audio data, when the descriptor indicating the multiplexed data is protected according to the HDCP.

7. The electronic apparatus of claim 6, further comprising a transmitter configured to transmit an audio signal of the audio data to an external device, wherein the one or more hardware processors is further configured to decode the audio data to generate the audio signal.

8. The electronic apparatus of claim 7, wherein the receiver is configured to receive the multiplexed data through a first digital interface complying with a first standard, and the transmitter is configured to transmit the audio signal to the external device through a second digital interface complying with a second standard different from the first standard.

9. The electronic apparatus of claim 7, wherein the transmitter is further configured to transmit copy control data representing never copy with the audio signal.

10. The electronic apparatus of claim 6, wherein the HDCP comprises at least HDCP 2.0 and later versions of HDCP 2.0.

11. The electronic apparatus of claim 6, further comprising:

a display configured to display video generated based on the video data; and

a speaker configured to output audio generated based on the audio data.

12. A method performed by an electronic apparatus for transmitting a protected content comprising video data and audio data, the electronic apparatus supporting a high-bandwidth digital content protection (HDCP), the method comprising:

establishing a key of the HDCP with a first electronic apparatus supporting the HDCP;

encrypting the video data to generate encrypted video data according to the HDCP, wherein the audio data is not encrypted according to the HDCP;

multiplexing the encrypted video data and the audio data to generate multiplexed data, wherein the multiplexed data comprises a descriptor indicating that the multiplexed data is protected according to the HDCP, and the audio data is handled as never copy to prohibit copying of the audio data by the first electronic apparatus; and

transmitting, over a wireless, a stream of the multiplexed data to the first electronic apparatus according to a real-time transport protocol (RTP).

13. The method of claim 12, further comprising:

encoding video of the protected content to the video data; and

encoding audio of the protected content to generate the audio data.

14. The method of claim 12, wherein the HDCP comprises at least HDCP 2.0 and later versions of HDCP 2.0.

15. The method of claim 12, further comprising:

displaying video generated based on the video data; and

outputting audio generated based on the audio data.

16. A method performed by an electronic apparatus supporting a high-bandwidth digital content protection (HDCP), the method comprising:

receiving, over a wireless, a stream of multiplexed data according to a real-time transport protocol (RTP) from a first electronic apparatus, wherein the multiplexed data comprises encrypted video data and audio data of a protected content, the encrypted video data is encrypted according to the HDCP, the audio data is not encrypted according to the HDCP, and the multiplexed data comprises a descriptor indicating whether the multiplexed data is protected according to the HDCP;

decrypting the encrypted video data to generate video data; and

handling the audio data as never copy to prohibit copying of the audio data, when the descriptor indicating the multiplexed data is protected according to the HDCP.

17. The method of claim 16, further comprising transmitting an audio signal of the audio data to an external device, wherein the method further comprises decoding the audio data to generate the audio signal.

18. The method of claim 17, wherein the transmitting comprises transmitting copy control data representing never copy with the audio signal.

19. The method of claim 16, wherein the HDCP comprises at least HDCP 2.0 and later versions of HDCP 2.0.

20. The method of claim 17, wherein:

the receiving comprises receiving the multiplexed data through a first digital interface complying with a first standard; and

the transmitting comprises transmitting the audio signal to the external device through a second digital interface complying with a second standard different from the first standard.

21. The method of claim 16, further comprising:

displaying video generated based on the video data; and

outputting audio generated based on the audio data.