Multimedia decoder method and system with authentication and enhanced digital rights management (DRM) where each received signal is unique and where the missing signal is cached inside the storage memory of each receiver
US7336784B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 2002 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Nov 17, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/6581
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio/video distribution system with enhanced digital rights management. configured for use with a source of programming, a third party responsible for authorization, and an audio/video output device at a recipient location, includes a source encryptor and a receiver and authentication device disposed at a recipient location. The source encryptor is responsible for transmitting the programming (including any applicable plus policies, rights and/or rules) in encrypted form with missing content to the recipient location. The receiver includes an input for receiving the programming, a decryptor, an output for delivering the programming to the audio/video output device, a bi-directional link for communicating with a third party authenticator, a sensor for receiving a programming request from the programming request device, and a processor. In response to a request for the programming, the processor is operative to send a signal to the third party, cause the decryptor to decrypt the programming and add the missing content in response to an authorization signal from the third party, and output the programming to the audio/video output device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.