Echo compensation device and 4/2-wire interface having such an echo compensation device
US5546460A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jun 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B3/23
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An echo compensation device, having a digital transverse filter, for an information transmission system is described, as well as a 4/2-wire interface having at least one such device. Accordingly, a scale value device is provided which respectively evaluates the value of the input signal and also the values of the time-delayed signals of the transverse filter and establishes a scale value as a function thereof. Furthermore, a device is provided for scaling all the signal values with the associated scale value before these are weighted with the respectively assigned filter coefficients. After addition of the weighted scaled signal values has been performed, the value of the output signal is descaled with the same scale value with which the signal values had previously been scaled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.