Method and apparatus for time companding a digital voice signal
US4893308A · kind A · utility
13Cited by
14References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 3, 1986 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Sep 3, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/662
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a method and apparatus for time companding a digital voice signal wherein, single bits are periodically removed from the digital voice signal, which is then compressed thereby forming a contiguous area of removed bits. A synchronization signal is inserted into this area and the combined signal is transmitted. At the receiver, the synchronization signal is extracted and is used to synchronize the receiver. The digital voice signal is then expanded and the removed bits are predicted and replaced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.