Error correction apparatus and method
US7506235B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 13, 2005 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Oct 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/1614
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system, method and data structure for error correction for use in the transmission of content data distribution networks uses a compressed memory, for example a bitmap, to identify portions of transmitted content data files where transmission errors have occurred. The error memory, is used to generate an error status report that is returned to a transmission controller via a low bandwidth back channel, for example the Internet. The information in multiple error status reports is aggregated by the control system of the transmitter and used to re-transmit those portions of previously transmitted content data files that were not properly received due to error. By re-transmitting only the data packets of the transmitted content data files that contain errors, overall transmission speed is increased and bandwidth usage is conserved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.