United Technologies Corporation

Other

Beijing Novel-super Digital Tv Technology Co., Ltd.

Academy of Broadcasting Science, State Administration of Press, Publication, Radio, Film & Television

Xingjun Wang

Lei Wang

Lei Zhang

Zhifan Sheng

Xiaoxia Guo

Peiyu Guo

Zhijian Liang

Yonglin Xue

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.

Digital rights management (DRM) method and system for intelligent operating system

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.

Terminal based on conditional access technology

Provided are a secure transmission method and apparatus for transport stream (TS). The method is applied to a receiving terminal of a digital television broadcasting system, comprising: after receiving a TS, a first device in the receiving terminal encrypts the received TS using a key already negotiated with a second device in the receiving terminal and utilizing a determined encryption algorithm, and sends the encrypted TS to the second device in the receiving terminal; after receiving the encrypted TS, the second device in the receiving terminal decrypts the received encrypted TS using the key and utilizing a decryption algorithm corresponding to the encryption algorithm. Using the present invention can protect the security of the TS transmission.

Secure transmission method and apparatus for transport stream

A UTI (Universal Transport Interface) is provided in the invention, the UTI comprising a transceiving unit, configured to receive and transmit data which accords with USB (Universal Serial Bus) specification; a detecting unit, configured to detect the data received by the transceiving unit to determine whether to convert the received data into data which accords with a particular specification; and a conversion unit, configured to convert the received data into the data which accords with the particular specification when determining that the received data should be converted into the data which accords with the particular specification, and to convert the transmission data which accords with the particular specification into data which accords with the USB specification for transmission via the transceiving unit. With the UTI provided in the invention, service cards may be separated from devices for DTV and various value-added services may be provided.

Universal bidirectional serial data transport interface and its data transport method

Growing community of inventors

Beijing, China

Xingjun Wang