{{Use mdy dates, date=November 2017 The quad digital audio processor (QDAP) was a digital signal processor (DSP) based printed circuit card designed at

Computer Consoles Inc. Computer Consoles, Inc. or CCI was a telephony and computer company located in Rochester, New York, United States, which did business first as a private, and then ultimately a public company from 1968 to 1990. CCI provided worldwide telephone comp ...

(CCI) in

Rochester, NY Rochester is a city in and the county seat, seat of government of Monroe County, New York, United States. It is the List of municipalities in New York, fourth-most populous city and 10th most-populated municipality in New York, with a populati ...

. The QDAP was a service circuit module developed as part of the companies digital telephony switching system. The main function of the card was the processing of incoming digital audio to detect the speech patterns using speaker independent

speech recognition Speech recognition is an interdisciplinary subfield of computer science and computational linguistics that develops methodologies and technologies that enable the recognition and translation of spoken language into text by computers. It is also ...

. The CCI digital switch was deployed as part of the Digital Audio Intercept System (DAIS II), Automatic Voice Response (AVR), and Interactive Voice System (IVS) products. The initial QDAP board is notable for introducing speech recognition into the public telephone network to automate the handling of operator assisted telephone calls.

Variants

* QDAP-I: ** This printed circuit card, designed by Mark A. Indovina, was introduced in late 1987 and contained four TMS320C25 16-bit fixed point DSP chips operating at 40 MHz.

Features

* Each TMS320C25 DSP core processed four simultaneous digital audio channels. * The card deployed speaker independent

for multiple languages * The speaker independent

vocabulary database could be efficiently changed by downloading an update over the switch time-slot network at any time * The speaker independent

vocabulary database could be created by the hosting telephone company as necessary based on the call scenario

References

* Advanced Speech Recognition (Nortel ASR Product Overview) * Interactive Voice Response (Nortel IVR Product Overview) Communication circuits Telephony equipment