Error correction for digital signal transmission
US4907248A · kind A · utility
14Cited by
13References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 22, 1987 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Sep 22, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/0059
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
The system provides correction for error signals caused by noise in the transmission channel in digital signals or analog signals which have been digitized. The first or second differential of the quantized values is taken and encoded. One or more reliable update signals per data block are included in the transmitted signal. Using any difference between an update signal value and the corresponding actual received signal value, an error signal in time reverse sequence is reconstructed in the receiver. This signal is reversed and subtracted from a signal containing the error signal to produce an accurate output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.