PCM subcode communications technique between a regional radio transmitter/receiver and a regional switching center
US5515397A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1994 |
| Grant date | May 7, 1996 |
| Priority date | — |
| Expiry date | Feb 28, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D30/70
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
In a radiotelephone network, processing steps previously applied to digital voice transmissions received by a regional radio transmitter/receiver but not applied to analog voice transmissions received by the transmitter/receiver are applied to such analog voice transmissions at the transmitter/receiver itself such that analog voice transmissions and digital voice transmissions may be transmitted identically between the regional radio transmitter/receiver and a regional switching center. In particular, a digital speech encoder/compressor and a corresponding digital speech decoder/decompressor (together referred to as a codec) provided at remote transmitter/receivers and the regional switching center are also provided at the regional radio transmitter/receiver so as to apply the same processing to analog voice transmissions received from the remote transmitter/receivers as is applied to digital voice transmissions at the remote transmitter/receivers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.