Conditional access method and system for intelligent operating system
US10321181B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 1, 2016 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | Dec 1, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/26613
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a conditional access method for an intelligent operating system that comprises a trusted execution environment. A digital TV module acquires all channel messages and a control management message. A media play module distributes a DescramblerId and sends the acquired videoPid, audioPid, casId, ecmPid and emmPid and the descrambler message DescramblerId to a conditional access module. The conditional access module selects a registered conditional access application module according to the casId. The conditional access application module acquires corresponding ecm Data and emm Data from the digital TV module, and sends the ecm Data and emm Data to the conditional access module. The conditional access module sends the messages to a trusted application module. The trusted application module performs parse to acquire EK1, EK2 and ECW. The security chip controls a descrambler corresponding to the DescramblerId to perform descrambling according to the acquired messages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.