Speech synthesized telephone answering circuit
First Claim
1. A voice synthesized telephone answering circuit for use in a communication system which includes a calling telephone station and a telephone line, said calling telephone station being operative to cause said communication system to apply a ringing signal to said telephone line, said telephone answering circuit comprising:
- vocabulary storage means operative to store digital representations of a predetermined group of words;
a ringing detector, connected to said telephone line and operative in response to said ringing signal to provide a ringing detected signal;
message storage means;
a first microprocessor connected to said message storage means;
decoding means connected to said first microprocessor;
said first microprocessor being operative to provide address signals representative of a speech processor, said ringing detector, and storage locations of said vocabulary storage means;
said decoding means being operative to provide corresponding enable signals for said speech processor, ringing detector and vocabulary storage means, respectively;
said first microprocessor being connected to said ringing detector and said vocabulary storage means via said decoding means, and operative in response to said ringing detected signal to retrieve selected ones of said digital words from said vocabulary storage means, and further operative to concatenate said retrieved words into a digital telephone answering message and store it in said message storage means;
said speech processor being connected to said first microprocessor via said decoding means;
said first microprocessor being further operative to retrieve said digital telephone answering message from said message storage means and transmit it to said speech processor;
said speech processor being operative in response to said digital telephone answering message to apply a corresponding analog telephone answering message to said telephone line;
whereby said calling telephone station receives a voice synthesized telephone answering message in response to causing application of ringing current to said telephone line.
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Accused Products
Abstract
A speech synthesized answering circuit for use with a telepone subscriber station. A microprocessor control circuit monitors a telephone line for detection of a predetermined number of ringing signal bursts. A read-only-memory contains a vocabulary of digitized words. The microprocessor answers the line and forms a telephone answering message by retrieving selected digitized words from the read-only-memory. This message is transferred to a speech processor which converts it to analog format and couples it onto the calling telephone line.
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Citations
7 Claims
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1. A voice synthesized telephone answering circuit for use in a communication system which includes a calling telephone station and a telephone line, said calling telephone station being operative to cause said communication system to apply a ringing signal to said telephone line, said telephone answering circuit comprising:
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vocabulary storage means operative to store digital representations of a predetermined group of words; a ringing detector, connected to said telephone line and operative in response to said ringing signal to provide a ringing detected signal; message storage means; a first microprocessor connected to said message storage means; decoding means connected to said first microprocessor; said first microprocessor being operative to provide address signals representative of a speech processor, said ringing detector, and storage locations of said vocabulary storage means; said decoding means being operative to provide corresponding enable signals for said speech processor, ringing detector and vocabulary storage means, respectively; said first microprocessor being connected to said ringing detector and said vocabulary storage means via said decoding means, and operative in response to said ringing detected signal to retrieve selected ones of said digital words from said vocabulary storage means, and further operative to concatenate said retrieved words into a digital telephone answering message and store it in said message storage means; said speech processor being connected to said first microprocessor via said decoding means; said first microprocessor being further operative to retrieve said digital telephone answering message from said message storage means and transmit it to said speech processor; said speech processor being operative in response to said digital telephone answering message to apply a corresponding analog telephone answering message to said telephone line; whereby said calling telephone station receives a voice synthesized telephone answering message in response to causing application of ringing current to said telephone line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification