Single channel EVRCx, ISLP and G.711 transcoding in packet networks
US8515769B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 11, 2010 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | Jan 25, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/033
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An apparatus in one example comprises a receiver of a first mobile switching center. The receiver is configured to receive an input signal in a first encoding format. The input signal has an input payload. The first encoding format is a dual-mode InterSystem Link Protocol (ISLP)/Enhanced Variable Rate Coding (EVRC) codec. The apparatus further comprises a transcoder operatively coupled to the receiver. The transcoder is structured to transcode in a single channel the first encoding format to a second encoding format. The transcoder is configured to generate an output signal in the second encoding format for transmission over an internet protocol (IP) network to a second mobile switching center based on the input signal. The output signal has an output payload based on the input payload. The transcoder is configured to switch between a default voice handling mode for the EVRC codec and a clear channel mode for the ISLP codec to form the output payload.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.