Electronic device and method of transmitting content item

• US 9,418,211 B2
• Filed: 09/17/2015
• Issued: 08/16/2016
• 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:
  US14/856,844
• Publication Number:
  US 20160004847A1
• Time in Patent Office: 334 Days
• US Class Current: 1/1
• 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. An electronic device configured to transmit a content item comprising video data and audio data, the device comprising:

one or more hardware processors configured to;

encrypt the video data to generate encrypted video data, by using an encryption system complying with a high-bandwidth digital content protection (HDCP) standard;

generate multiplexed data comprising the encrypted video data and the audio data not subjected to encryption complying with the HDCP standard; and

insert a descriptor in the multiplexed data if copyright protection is required for the video data, the descriptor indicating that the video data is encrypted by using an encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard; and

a wireless transmitter configured to transmit the multiplexed data to an external device via a wireless transmission path according to a real-time transport protocol (RTP), wherein;

the external device prohibits copying of both the video data encrypted in accordance with the HDCP standard and the audio data not subjected to encryption complying with the HDCP standard if the descriptor is inserted in the multiplexed data, the descriptor indicating that the video data is encrypted by using the encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard.

2. The electronic device of claim 1, wherein the one or more hardware processors are configured to:

encode video to generate the video data;

encode the audio data; and

generate the multiplexed data comprising the encrypted video data and the encoded audio data not subjected to encryption complying with the HDCP standard.

3. The electronic device of claim 1, wherein the wireless transmitter is configured to transmit the multiplexed data to the external device via a wireless transmission path after an authentication between the electronic device and the external device is completed, the authentication is complying with the HDCP standard.

4. An electronic device configured to receive a content item comprising video data and audio data, the device comprising:

a wireless receiver configured to receive multiplexed data from a wireless transmission path according to a real-time transport protocol (RTP), the multiplexed data comprising the video data encrypted by using an encryption system complying with a high-bandwidth digital content protection (HDCP) standard and the audio data not subjected to encryption complying with the HDCP standard; and

a hardware processor configured to prohibit copying of the audio data not subjected to encryption complying with the HDCP standard in the multiplexed data if a descriptor is inserted in the multiplexed data, the descriptor indicating that the video data is encrypted by using the encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard.

5. The electronic device of claim 4, further comprising a transmitter configured to transmit audio corresponding to the audio data to an external device.

6. The electronic device of claim 5, further comprising an audio decoder configured to decode the audio data to generate digital audio data,

wherein the transmitter is configured to transmit the digital audio data corresponding to the audio data to the external device.

7. The electronic device of claim 6, wherein the wireless receiver is configured to receive the multiplexed data through a first digital interface complying with a second standard, and the transmitter is configured to transmit the digital audio data corresponding to the audio data to the external device through a second digital interface complying with a third standard.

8. The electronic device of claim 7, wherein the transmitter is configured to transmit the digital audio data with copy control data prohibiting the digital audio data from being copied.

9. The electronic device of claim 8, further comprising a display configured to display video corresponding to the video data.

10. The electronic device of claim 4, further comprising a display configured to display video corresponding to the video data.

11. A method of transmitting a content item for an electronic device which transmits the content item comprising video data and audio data, the method comprising:

encrypting the encoded video data, by using an encryption system complying with a high-bandwidth digital content protection (HDCP) standard;

generating, by one or more hardware processors, multiplexed data complying with an MPEG-2 TS format, the multiplexed data comprising the encrypted video data and the audio data not subjected to encryption complying with the HDCP standard, the generating comprising inserting a descriptor in the multiplexed data if copyright protection is required for the video data, the descriptor indicating that the video data is encrypted by using an encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard; and

transmitting the multiplexed data to an external device via a wireless transmission path, wherein;

the external device prohibits copying of both the video data encrypted in accordance with the HDCP standard and the audio data not subjected to encryption complying with the HDCP standard if the descriptor is inserted in the multiplexed data, the descriptor indicating that the video data is encrypted by using the encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard.

12. A method of receiving, by an electronic device, a content item comprising video data and audio data, the method comprising:

receiving, by a wireless receiver, multiplexed data from a wireless transmission path according to a real-time transport protocol (RTP), the multiplexed data comprising the video data encrypted by using an encryption system complying with a high-bandwidth digital content protection (HDCP) standard and the audio data not subjected to encryption complying with the HDCP standard; and

prohibiting, by a hardware processor, copying of the audio data not subjected to encryption complying with the HDCP standard in the multiplexed data if a descriptor is inserted in the multiplexed data, the descriptor indicating that the video data is encrypted by using the encryption system complying with the HDCP standard and not indicating that the audio data is encrypted by using an encryption system complying with the HDCP standard.