Broadcast deduplication for satellite broadband
US8762718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2012 |
| Grant date | Jun 24, 2014 |
| Priority date | — |
| Expiry date | Aug 3, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/601
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A headend gateway can receive a data stream to forward to a client device of a broadcast network, and can determine whether the data stream includes a data block that has been recently broadcasted to any device of the broadcast network. The system can generate a new data stream that includes an identifier to any data block that has been broadcasted recently, and includes an encrypted block-decryption key that allows the recipient of the data stream to decrypt the data block. A client device of the broadcast network can receive a plurality of encrypted data blocks from the broadcast network, and can cache a subset of these encrypted data block regardless of whether or not they are intended for the local client device. The client device can access a cached data block when it receives an identifier and a block-decryption key for the data block.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.