Device for processing digital signal in audio-frequency bandwidth
US4989232A · kind A · utility
13Cited by
0References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1988 |
| Grant date | Jan 29, 1991 |
| Priority date | — |
| Expiry date | Nov 18, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N2201/3278
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital signal processing device for processing signals in the audio-frequency band with using a digital input-output interface circuit, analog input-output interfaces as well as digital signal processing circuit for converting digital signals to analog signals and vice versa. A memory is used for storing various programs for processing MODEM functions, voice-coding/synthesizing and the like in the digital signal processor selectively employs either one of the MODEM function processing programs and the voice coding/synthesizing function program, both of which are stored in the memory in accordance with an external command.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.