Voice-band signal processor

Details Voice-band signal processor Voice-band signal processor

1989-06-28

1991-07-23

Safourek, Benedict V.

Pulse or digital communications

Repeaters

Testing

375 96, H03H 1700

Patent

active

050349627

ABSTRACT:
A voice-band signal processor uses a DSP to filter digital transmit and receive voice-band signals, and has oversampling D/A and A/D converters with a frequency converter to convert between the oversampling rate and the DSP rate. An interpolator converts the filtered receive voice-band signal to a pseudo-analog signal that can be sampled by a demodulator in synchronization with a regenerated receive sampling clock, thus enabling correct operation even when the transmit and receive sampling clock rates do not match. In addition, the voice-band signal processor contains a status register circuit connected to flag registers in the DSP, enabling a host computer to read and set flag values that control the operating mode of the voice-band signal processor. The voice-band signal processor can thus be switched between half duplex and full duplex operation, or between different bit rates.

REFERENCES:
patent: 4310721 (1982-01-01), Manley et al.
patent: 4633225 (1986-12-01), Hayashi et al.
patent: 4633426 (1986-12-01), Venier
patent: 4677645 (1987-06-01), Kaniwa et al.
patent: 4908787 (1990-03-01), Dyer
Yamamoto et al., "Front-End Processor for Modems," ISSCC Digest of Tech. papers, Feb. 1989, New York, pp. 262-263.
Douglas B. Cox et al., "A Real-Time Programmable Switched-Capacitor Filter," IEEE Journal of Solid-State Circuits, vol. SC-15, No. 6, Dec. 1980, pp. 972-974.

Affiliated with

Also associated with

Rating

Voice-band signal processor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Voice-band signal processor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Voice-band signal processor will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-438330