公开(公告)号：US09479825B2

公开(公告)日：2016-10-25

申请号：US14111183

申请日：2012-04-09

Applicant: Xingjun Wang

Inventor： Xingjun Wang

IPC: H04N7/16 ,  H04N21/4367 ,  H04N21/4405 ,  H04N21/4623 ,  H04N21/426 ,  H04N21/4408

CPC classification number: H04N21/4367 ,  H04N21/42623 ,  H04N21/4405 ,  H04N21/4408 ,  H04N21/4623

Abstract: The terminal comprises a tuner, a security chip and a digital television terminal main chip. The tuner is used to receive cable television broadcast data through a cable for cable televisions, and transmit the received cable television broadcast data to the security chip. A key message required by CA is stored in the security chip. The security chip is used to extract stream media of a program needing to be played from the received cable television broadcast data, descramble the stream media according to the stored key message required by the CA, encrypt the descrambled stream media, and transmit the encrypted stream media to the digital television terminal main chip. The digital television terminal main chip is used to decrypt the received encrypted stream media, decode the decrypted stream media to obtain audio and video data, and output the audio and video data.

Abstract translation: 终端包括调谐器，安全芯片和数字电视终端主芯片。 调谐器用于通过有线电视的电缆接收有线电视广播数据，并将接收的有线电视广播数据发送到安全芯片。 CA所需的关键信息存储在安全芯片中。 安全芯片用于从接收到的有线电视广播数据中提取需要播放的节目的流媒体，根据存储的CA所需的密钥消息解密流媒体，加密解扰的流媒体，并发送加密的流 媒体到数字电视终端主芯片。 数字电视终端主芯片用于对接收到的加密流媒体进行解密，解码解密的流媒体以获得音频和视频数据，并输出音频和视频数据。

公开(公告)号：US10685094B2

公开(公告)日：2020-06-16

申请号：US15781143

申请日：2016-12-01

Applicant: Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film & Television ,  Unitend Technologies Inc. ,  BEIJING NOVEL-SUPER DIGITAL TV TECHNOLOGY CO., LTD

Inventor： Zhifan Sheng ,  Xingjun Wang ,  Lei Wang ,  Zhijian Liang ,  Xiaoxia Guo ,  Jing Zhang ,  Peiyu Guo

IPC: H04L29/06 ,  G06F21/10 ,  H04N21/254 ,  G06F21/12 ,  H04L9/08 ,  G06Q20/12 ,  G06F9/455

Abstract: A digital rights management (DRM) method for an intelligent operating system comprises: acquiring a play list of media data to be played and encrypted media data; inquiring and acquiring one or more DRM application modules, wherein the DRM application module contains an identifier of a trusted application module; requesting DRM authorization by the DRM application module from a DRM server, judging a content permission and acquiring an encrypted content encryption key (ECEK) and transmitting the ECEK to a TEE; after judging that the content permission is legitimate; decrypting the ECEK acquired by the trusted application module which is in the TEE and corresponds to the trusted application module identifier to acquire a content encryption key (CEK), and decrypting the encrypted media data by using the CEK; and storing the decrypted media data in a security cache region for decoding and outputting.