KR970006950B1 - Voice mail system - Google Patents

Abstract

The connecting device for a personal automatic answering and voice mail system includes a subscriber line connecting circuit (1) provided with a voice signal from a subscriber line; a voice signal controlling unit (2) connected to the subscriber line connecting circuit (1) and a telephone set or to a microphone and a loud speaker to convert the voice signal; and an AT bus connecting circuit (3) receiving a digital voice signal from the voice signal controlling circuit (2) by an interrupt of the subscriber line connecting circuit (1)to transmit it to a personal computer where the personal automatic answering and voice mail system is embodied.

Description

Subscriber access device for personal answering machine and voice mail system

1 is a block diagram of a subscriber access device for a personal answering machine and a voice mail system according to the present invention.

FIG. 2 is a detailed block diagram of the subscriber line connection circuit shown in FIG.

3 is a detailed block diagram of the voice signal control circuit shown in FIG.

4 is a detailed block diagram of the AT bus connection circuit shown in FIG.

* Explanation of symbols for main parts of the drawings

1 Subscriber Line Connection Circuit 2 Voice Signal Control Circuit

3: AT bus connection circuit 21: protection circuit

22: photo coupler 23: ring counter

24: hybrid coil 25: hook switch relay

26: DTMF generation and detector 27: Beep detector

28: Clock Generator 31: Amplification and Lowpass Filter

32: Converter 33: Multiplexer

34: memory buffer 35: buffer controller

36: LPC synthesizer 37: clock control circuit

40: personal computer AT bus slot 41: signal buffer

42: address decoder 43: interrupt selector

44: address selection switch

The present invention relates to a subscriber answering device for a personal answering machine and a voice mail system for providing various service functions of a personal answering machine and a voice mail system.

In the related art, an automatic answering system or a voice mail system is configured or operated independently of each other, and there is a problem in that it is cumbersome to use the connection, and a large amount of auxiliary memory device is required according to PCM (Pulse Code Modulation) data storage.

The present invention has been made to solve the problems of the above-described technology, the personal automatic response to enable continuous voice service for a long time by applying a buffer memory method when sending or receiving voice and easy to expand the subscriber access line and It is an object of the present invention to provide a subscriber access device for a voice mail system.

According to an aspect of the present invention, there is provided a subscriber line connection circuit unit for receiving a voice signal from a subscriber line, a voice signal control circuit unit connected to the subscriber line connection circuit unit, a telephone set, a microphone, and a loudspeaker to convert a voice signal; And an AT bus connection circuit unit for receiving a digital voice signal from the voice signal control circuit unit by an interruption of the subscriber line connection circuit unit and delivering the digital voice signal to a personal computer having a personal answering machine and a voice mail system.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention;

FIG. 1 is a block diagram of a subscriber access device for a personal answering machine and voice mail system according to the present invention, where 11 is a subscriber line connection circuit, 12 is a voice signal control circuit, and 13 is an AT bus connection circuit.

As shown in the figure, a subscriber connection apparatus for a personal answering machine and a voice mail system includes a subscriber line connection circuit unit 1 for receiving a voice signal from a subscriber line, an analog voice signal input from the subscriber line connection circuit unit 1, Or digital voice from the voice signal control circuit 2 by interruption of the subscriber line connection circuit 1 with the voice signal control circuit 2 for converting an analog voice signal input from a telephone set or a microphone into a digital signal. AT bus connection circuit section 3 for receiving a signal and transmitting the signal to a personal computer in which a personal answering machine and a voice mail system are implemented.

According to the present invention constituted as described above, the analog audio signal inputted from the telephone set or the microphone and the subscriber line connection circuit unit 1 is converted into a digital signal through the voice signal control circuit unit 2, and then the AT bus connection circuit unit 3 is connected. The audio signal is recorded and stored in the auxiliary storage device of the personal computer, and the reproduction of the voice signal is processed in the reverse order and transmitted to the telephone set, the loudspeaker, or the network connected to the subscriber line.

However, the voice signal synthesized by LPC (Linear Predictive Coding) synthesized by the voice signal control circuit 2 is immediately reproduced through the subscriber line connection circuit 1.

2 is a detailed block diagram of the subscriber line connection circuit 1 shown in FIG. 1, which connects the present invention to a public telephone network and transmits and receives analog voice signals.

As shown in the figure, the subscriber line connection circuit unit 1 is connected to the protection circuit 21 against the impact voltage of the subscribing own ship consisting of a tip line and a ring line, and the protection circuit 21. A photo-coupler 22 for adjusting DC blocking and electrical characteristics, and a ring counter that detects a ring signal from an output signal of the photo coupler 22 and transmits the ring signal to the voice signal control circuit unit 2. (23), the hybrid coil 24 for converting two wires and four wires between the protection circuit 21 and the audio signal control circuit unit 2, and the protection circuit 21 and the hybrid coil 24 A lumped switch relay 25 for controlling hook on / off between the DTMF generator and detector 26 connected to the hybrid coil 24 to generate or detect a Dual Tone Multifrequency Signaling (DTMF) tone, and the hybrid Various signals from the exchange through the coil 24 A beep detector 27 for detecting a tone (call tone, call tone, ring tone), and a clock generator 28 for providing a clock to the DTMF generation and the detector 26 and the beep detector 27, wherein the hybrid The coil 24 has a 600Ω: 600Ω impedance and the DTMF generation and the tone duration accept time of the detector 26 are at least 40ms and the minimum receivable level is -32dbm.

In the subscriber line connection circuit unit 1 configured as described above, the hook switch relay 25 is operated at the time of transmission by the user's hook-off request, and the DTMF is detected by the tone detector 27 after detecting the dial tone from the network. The dial number of the called party is sent out by the DTMF tone generated by the generation and the detector 26.

At the time of the incoming call, the ring signal input through the protection circuit 21 and the hybrid coil 24 connected to the subscriber line is detected by the ring counter 23 after the photo coupler 22 and the hook switch is turned on by the result. The relay 25 is driven to make a call. The push button signals input later are detected by the DTMF generation and detector 26 and transmitted to the voice signal control circuit section 2.

FIG. 3 is a detailed block diagram of the voice signal control circuit 2 shown in FIG. 1, in which a voice signal input through a telephone network is encoded by ADPCM (Adaptive Differential Pulse Code Modulation) or by ADPCM. Performs the signal operation as an analog voice signal.

As shown in the figure, the voice signal control circuit section 2 includes an amplification and low band for amplifying and filtering 3.4 KHz analog voice signals between the microphone, loudspeaker and telephone sets and the subscriber line connection circuit section 1. A converter 32 connected to the pass filter 31, the amplification and low pass filter 31 to perform analog / digital conversion and digital / analog conversion for ADPCM, and analog / digital conversion in the converter 32. A memory buffer 34 for receiving and storing data, a multiplexer 33 for multiplexing the data output from the memory buffer 34 to the converter 32, and between the memory buffer 34 and the hard disk. A buffer controller 35 for controlling the memory buffer 34, an LPC synthesizer 36 for synthesizing a linear predictive code between the amplification and lowpass filter 31 and the subscriber line connection circuitry 1, And a clock control circuit 37 to provide a clock between the transducer 32 and the AT bus connection circuit (3).

The voice signal control circuit unit 2 configured as described above is amplified and received by the low pass filter 31 when the incoming signal is amplified by 3.4KHz or less, and then input to the converter 32 to the ADPCM method The data is converted into digital data and stored in the memory buffer 34. At the time of reproduction, the digital audio data converted from the converter 32 into an analog audio signal passes through the amplification and low pass filter 31 and is transmitted through the loudspeaker or the telephone network.

In the analog / digital conversion of the converter 32, an analog audio signal is sampled at a frequency of 8 KHz, 4-bit ADPCM coding is performed, and outputted in units of 1 byte every 256 μs, and the LPC (Lineat Predictive coding) synthesizer 36 ) Is a synthesizer that obtains the prediction coefficients for the error signal (residual signal) between the original signal and the predicted signal, and then reads the data necessary for synthesis and processes LPC filtering to produce synthesized speech. The calculated value is stored in the ROM, and the value of the voice data code is assigned to the assigned address so that the corresponding voice is synthesized and outputted so as to provide services such as time, day, and greeting. Device. The memory buffer 34 causes the corresponding flag to be set when the digitalized voice data is collected for a predetermined amount or more.

4 is a detailed block diagram of the AT bus connection circuit unit 3 shown in FIG. 1, and has control and timing synchronization functions that satisfy the AT bus interface standard.

As shown in the figure, the AT bus connection circuit section 3 is provided between a personal computer AT bus slot 40 and a personal computer AT bus slot 40 and a voice signal control circuit section 2 for connection to a personal computer. A signal buffer 4l which provides a bus signal and a control signal of an address and data so as to be connected to a personal computer, and receives a signal from the AT bus slot 40 of the personal computer, the signal buffer 41 and a voice signal control circuit unit ( 2) an address decoder 42 providing an address for designating the audio signal control circuit section 2, and an address selection switch for allowing the address decoder 42 to select an address address which is not used on the AT bus. 44) and an interrupt that selects an interrupt generated from the subscriber line connection circuit 1 and the voice signal control circuit 2 to inform a personal computer.

And a selector 43.

As described above, the present invention satisfies the subscriber access standard of the public telephone network, integrates an automatic answering system, a voice mail system, and a subscriber circuit, and has an economical configuration. There is an advantage that voice service is possible, and the line can be easily expanded, and there is an effect that can be utilized for voice information processing function in a multimedia environment that provides various life information as well as personal answering machine and voice mail system.

Claims (5)

A subscriber line connection circuit portion 1 for receiving a voice signal from a subscriber line, a voice signal control circuit portion 2 connected to the subscriber line connection circuit portion 1, a telephone set or a microphone, a loudspeaker and converting a voice signal; An AT bus connection circuit section 3 for receiving a digital voice signal from the voice signal control circuit section 2 by an interrupt of the subscriber line connection circuit section 1 and delivering the digital voice signal to a personal computer implementing a personal answering machine and a voice mail system. Subscriber access device for personal answering and voice mail system characterized in that it comprises. The circuit of claim 1, wherein the subscriber line connection circuit unit (1) includes a protection circuit (21) for the impact voltage of the subscriber line formed of a tip (TIP) line and a ring (RING) line, and the protection circuit (21). A photo coupler 22 connected to adjust DC blocking and electrical characteristics, and a ring for detecting a ring signal from an output signal of the photo coupler 22 and transmitting the ring signal to the voice signal control circuit 2. Hybrid insertion 24 by the 2-wire and 4-wire conversion between the counter 23, the protection circuit 21 and the audio signal control circuit unit 2, the protection circuit 21 and the hybrid coil 24 A lump switch relay 25 for controlling hook on / off, and a DTMF generator and detector 26 connected to the long-term hybrid coil 24 to generate or detect a Dual Tone Multifrequency Signaling (DTMF) tone, Various beeps coming from the exchange through the hybrid coil 24 A beep detector 27 for detecting a beep, a call tone, a ringing tone, and a clock generator 28 for providing a clock to the DTMF generation and the detector 26 and the beep detector 27 Subscriber access device for automatic answering and voice mail system. The subscriber connection device for a personal answering machine and a voice mail system according to claim 2, wherein the hybrid coil has a impedance of 600 Ω: 600 Ω. 3. The personal answering machine and voice mail system according to claim 2, wherein the DTMF generator and the detector 26 have a tone duration accept time of at least 40 ms and a minimum receivable level of -32 dbm. Subscriber Access Device. The amplification and low pass filter of claim 1, wherein the voice signal control circuit part 2 is configured to amplify and filter an analog voice signal frame between a microphone, a loudspeaker and a telephone set, and the subscriber line connection circuit part 1. 31), a converter 32 connected to the amplification and lowpass filter 31 to perform analog / digital conversion and digital / analog conversion for Adaptive Differential Pulse Code Modulation (ADPCM), and the analog in the converter 32. A memory buffer 34 for receiving and storing the digitally-converted data, a multiplexer 33 for multiplexing the data output from the memory buffer 34 to the converter 32, and the memory buffer 34 And a linear predictive code between the buffer controller 35 which controls the memory buffer 34 between the disk and the hard disk, and between the amplification and low pass filter 31 and the subscriber line connection circuit section 1. Subscriber connection for personal answering machine and voice mail system, comprising an LPC synthesizer 36 and a clock control circuit 37 for providing a clock between the converter 32 and the AT bus connection circuit section 3. Device.