Method and apparatus compensating for effects of digital loss insertion in signal transmission between modems
US6195384A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 6, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Jan 6, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B14/048
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The present invention provides a method and apparatus for minimizing quantization noise in signal transmissions between modems coupled together via a digital network resulting from the performance of digital loss insertion in .mu.-law encoded signal transmissions when the receiving modem is coupled to the digital network via an analog subscriber loop. In a preferred embodiment, the minimization of quantization noise is effected by providing a digital modem capable of .mu.-law encoding and decoding a signal transmission; and capable of scaling the amplitude levels of signals generated by the modem; and capable of performing an inversion mapping.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.