Adapter card implementing a time-shared digital signal processor
US6556676B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 12, 1999 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Jul 12, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/60
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
The invention provides an adapter card for use with a computing apparatus executing in a multitasking environment program elements that implement call-related functional units requiring DSP (Digital Signal Processor) resources. In a specific example, the call-related functional units provide voice recognition services, IP (Internet Protocol) telephony and voice message, among others. The adapter card includes a switch that receives voice signals from one or more telephone lines physically connected to the adapter card. A digital signal processor is provided on the adapter card and can receive an audio signal from the switch for processing. When anyone of the call-related functional units needs access to the resources of the DSP, it issues a control signal to the switch that responds by directing the audio signal that is to be processed by the call-related functional unit to the digital signal processor. The results of the manipulations performed by the digital signal processor on the audio signal are then transferred to the call-related functional unit for further processing. The invention also provides a method and apparatus for processing calls implementing the above-functionalit…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.