DTMF detection in an integrated data processing system
US5487173A · kind A · utility
12Cited by
7References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 6, 1994 |
| Grant date | Jan 23, 1996 |
| Priority date | — |
| Expiry date | Sep 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/38
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention is directed to an integrated data processing system that includes a general purpose (GP) CPU core for processing data in accordance with a GP instruction set and a digital signal processor (DSP) module for processing data in accordance with command-list code. The DSP module is operable to execute the command-list code independent of and in parallel with execution of the GP instruction set by the CPU core. The system also includes a mechanism for DTMF detection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.