KR100399482B1 - Auto answering recording and revival apparatus of image telephone - Google Patents

Abstract

The present invention relates to an automatic answering recording and reproducing apparatus of a video telephone. More specifically, it relates to a technology for easily attaching an automatic voice response function of an existing high-end phone to a new video phone called a video phone without a cost increase.

According to the present invention, there is provided a modem unit for carrying compressed A / V data on a general telephone line or receiving audio and video signals transmitted from a counterpart; A first MUX unit transmitting the analog audio signal output from the modem unit according to a selector control signal; A second MUX unit which determines a path of the voice signal output from the first MUX unit according to a selector control signal and outputs the audio signal to a handset, a speaker phone, or an external audio port; An ADC unit for converting an analog audio signal output from the second MUX unit into a digital signal; An A / V compression chip which compresses and encodes a voice signal output from the ADC unit and a modem unit, and restores and decodes the compressed voice data transmitted from the other party; And a DAC unit converting the voice signal output from the A / V compression chip into an analog signal and transmitting the analog signal to the first MUX.

Description

Auto answering recording and revival apparatus of image telephone}

The present invention relates to an automatic answering recording and reproducing apparatus of a video telephone. More specifically, it relates to a technology for easily attaching an automatic voice response function of an existing high-end phone to a new video phone called a video phone without a cost increase.

In general, a video telephone is a generic telephone line (POTS: General Telephone) as well as a general voice phone as well as a phone that can talk to each other while watching the video.

Looking at the configuration briefly, the camera unit / display unit for receiving an input and output image; A video compression chip that compresses and encodes the received image, and decompresses and decodes the compressed image data transmitted from the other party; A microphone / speaker unit for inputting and outputting voice; An audio compression chip for compressing and encoding the received voice and restoring and decoding the compressed voice data transmitted from the opponent; The compressed A / V data may be classified into a modem unit capable of carrying a general telephone line or receiving data transmitted from a counterpart.

In addition, the existing system may use a hybrid circuit or a component that can play the role of a conventional analog telephone, instead of a circuit using a modem, to make a general analog voice call before a digital video call. .

The prior art, which has applied various functions of such a videophone to a videophone, is known as "application number; 10-1996-0011671, the title of the invention; a method for receiving an automatic answer and a message of the absence of a PC videophone".

This provides a method by which each called party can automatically answer the calling party and receive a message transmitted from the calling party by using each whiteboard between the calling party and the absent called party.

Another prior art is known as "Application No .; 10-1996-074330, Name of the Invention; Specific answering method of video telephone."

It stores the automatic answering message in the memory of the video phone in the memory and stores the personal information such as the personal identification number of the other party who missed the call. The present invention provides a specific automatic answering method of a video telephone that delivers a message and delivers a general automatic answering message to an unspecified number.

However, the above-described prior arts merely add video phones and existing general answering machines to perform special functions.

In addition, by simply adding the answering machine to the video phone, the cost and H / W redundancy are only increased.

Accordingly, an object of the present invention is to provide a call answering service having various functions that can be implemented in an existing answering machine without a cost increase.

It is another object of the present invention to implement various digital synthesized sounds such as telephone ringing, including background mute during initial analog voice call, as well as answering service of video telephone by using the automatic answering recording and reproducing circuit. have.

As a technical idea for achieving the above object of the present invention

A modem unit for carrying compressed A / V data on a general telephone line or receiving audio and video signals transmitted from a counterpart;

A first MUX unit transmitting the analog audio signal output from the modem unit according to a selector control signal;

A second MUX unit which determines a path of the voice signal output from the first MUX unit according to a selector control signal and outputs the audio signal to a handset, a speaker phone, or an external audio port;

An ADC unit for converting an analog audio signal output from the second MUX unit into a digital signal;

An A / V compression chip which compresses and encodes a voice signal output from the ADC unit and a modem unit, and restores and decodes the compressed voice data transmitted from the other party;

Provided is an automatic answering recording and reproducing apparatus of a video telephone comprising a DAC unit for converting an audio signal output from the A / V compression chip into an analog signal and transmitting the same to the first MUX.

1 is a block diagram of a video telephone according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: modem 20,30: first and second mux (multiplexing)

32: handset 34: speakerphone

36: external audio 40: ADC (analog-to-digital converter)

50: DAC (Digital-to-Analog Converter) 60: A / V Compression Chip

Hereinafter, with reference to the accompanying drawings, the configuration and operation of the embodiment of the present invention will be described in detail.

1 is a block diagram of a video telephone according to the present invention.

Referring to FIG. 1, a telephone line TEL-LINE is connected to a modem 10, and a tip and ring signal through the connected telephone line is an analog voice input / output signal through the modem 10. It is separated into RX and TX. Of these two signals, the RX signal is input to the first MUX (multiplex) 20 and is input to the A port of the second MUX 30 through the B port of the first MUX 20. The input RX signal has a path determined according to a selector (A) control signal of the second MUX 30, such as a hand set (32), a speaker phone (SPEAKER PHONE) 34, or an external audio port. 36 and the like. In addition, the TX voice signal input from the handset 32, the speaker phone 34, or the external audio 36, etc. according to the selector A signal of the second MUX 30 is outputted to the B of the second MUX 30 to A /. The V compression chip 60 is input via an ADC (AD Converter) 40. The input RX voice signal is converted into an analog voice signal through a D-A converter (50) again, input to the first MUX 20, and output to the port according to the selector signal of the second MUX 30.

Next, each function operation of the video telephone will be described.

1) When making a call using a video phone

; The A / V compression chip 60 that receives the key input by the user generates a DTMF signal and outputs it through A1 and B1 of the first MUX 20 through the DAC 50. The DTMF signal output through A1 of the first MUX 20 is transmitted to the switchboard via TX, and the DTMF signal output through B1 of the first MUX 20 is again inputted to the second MUX 30 to handset 32. Alternatively, the DTMF is output toward the speaker of the speaker phone 34 so that the user can make a phone call.

2) In case of general analog voice communication

; The voice input to the microphone (MIC) using the handset 32 is output to the B port through the B0 port of the second MUX 30, and is transferred to the A / V compression chip 60 through the ADC 40. do. The transmitted voice signal is again input to A0 of the first MUX 20 via the DAC 60 and voice is transmitted to the other party through the TX of the modem 10 via the A port.

On the contrary, the other party's voice is outputted to the handset 32 through R0 input through the modem 10 through A0 of the second MUX 30 via B0 of the first MUX 20.

In the case of the MUTE function for preventing voice transmission to the other party during general voice communication, when the MUTE button is input, the A / V compression chip 60 ignores the voice signal input through the ADC 40 and stores the data. That is, the MUTE background music data stored in the memory is read and decoded and transmitted to the other party through A0 of the DAC 50 and the first MUX 20.

3) In case of video communication

; In video communication, that is, digital communication, an image signal for video communication is transmitted to the A / V compression chip 60 through an image pickup means, that is, a camera. The transmitted video signal is transmitted to the modem 10 together with the audio compression stream data which compresses the audio signal input from the microphone after performing the video compression in the A / V compression chip 60, and transmits the signal to the other party through the modem 10. It is delivered. The video and audio compression data transmitted from the other party is transmitted to the A / V compression chip 60 again through the modem 10, and the A / V compression chip 60 restores the transmitted video and audio data to display the image. That is, the display is displayed on the display and the voice is output to the speaker through the BAC and the second MUX 30 of the DAC 50 and the first MUX 20.

4) For ringtone playback

; The ring tone generation is performed by using the voice processing function of the A / V compression chip 60 without using the ringer chip of the existing telephone. The pump is pumped into the A / V compression chip 60 and decoded by the A / V compression chip 60 to output to the speaker via B2 of the first MUX 20 and A2 of the second MUX 30 via the DAC 50. Thus, various sounds can be reproduced without using the existing Ringer IC.

5) In case of auto answer function

; The auto answer function first compresses a sound input by using a microphone of a handset or a speaker phone by using an A / V compression chip 60 through an ADC 40 for a recording function of recording an auto answer message. To record. The recorded auto-answer message is output through A1 and B1 of the first MUX 20 through memory, A / V compression chip 60 and DAC 50 when the other party calls. Is output.

In addition, when the other party leaves a message in response, the selector B signal of the first MUX 20 selects A0 and B0 as the port of the first MUX 20, and the selector A signal of the second MUX 30 is selected as the port. Select A3, B3. Therefore, the sound recorded by the other party is A-> A3-> speaker of the second MUX 30 through B0-> B of the first MUX 20 and A3-> B3-> B-> ADC of the second MUX 30. Through 4, the voice input from the A / V compression chip 60 can be compressed and recorded in the memory. In order to listen to the recorded sound, the user can restore the voice recorded in the memory from the A / V compression chip 60 to the DAC 50-> (B2-> 1st MUX (20)-> B)-> (A-> It is output to the speaker through the second MUX 30-> A2).

Make a call General voice communication Video communication Bell sound MUTE Auto Answer Message response Message history Message playback Selector (A) A0, B0 or A1, B1 A0, B0 or A1, B1 A0, B0 or A1, B1 A2, B2 A0, B0 or A1, B1 A2, B2 A3, B3 A0, B0 or A2, B2 Selector (B) A1, B1 A0, B0 A2, B2 A2, B2 A1, B1 A1, B1 A0, B0 A2, B2

Table 1 shows the connection states of the first MUX 20 and the second MUX 30 according to each function operation of the video telephone as described above. In case of general communication and video communication using MUX (multiplexing), It is possible to realize a variety of call answering services that can be easily implemented in existing answering machines without increasing the cost.

As described above, the automatic answering recording and reproducing apparatus of a video telephone according to the present invention has the following advantages.

First, it can be easily applied at low cost in implementing various functions in a video telephone, which can be provided from a normal telephone, from initial dialing to an answering machine.

Second, since the existing video phone is combined with the digital part, which is a video phone part, and the analog part, which is a general phone, it is easy to solve the increased cost, circuit complexity, and inconvenience of implementation.

Third, it records the ringing tone, mute background sound, answering machine and stored message used in the phone in a certain area of the memory used by the video phone, and uses the Digital Signal Processor (DSP) function used for the voice compression of the video phone. By dealing with this, you can easily provide various functions.

Claims (4)

A modem unit for carrying compressed A / V data on a general telephone line or receiving audio and video signals transmitted from a counterpart; A first MUX unit transmitting the analog audio signal output from the modem unit according to a selector control signal; A second MUX unit which determines a path of the voice signal output from the first MUX unit according to a selector control signal and outputs the audio signal to a handset, a speaker phone, or an external audio port; An ADC unit for converting an analog audio signal output from the second MUX unit into a digital signal; An A / V compression chip which compresses and encodes a voice signal output from the ADC unit and a modem unit, and restores and decodes the compressed voice data transmitted from the other party; And a DAC unit converting the audio signal output from the A / V compression chip into an analog signal and transmitting the analog signal to the first MUX. The memory device of claim 1, wherein the A / V compression chip comprises: a memory unit configured to store music background data for a mute; A camera unit for capturing an image; And a display unit for displaying an image output from the camera unit. The apparatus of claim 1, wherein the A / V compression chip generates a DTMF signal according to a user's key input. The method according to claim 1 or 2, wherein the A / V compression chip ignores the voice signal input from the ADC unit according to the user's mute key input and preferentially overrides the MUTE music background data stored in the memory unit. Automatic answering recording and playback device of a video telephone, characterized in that the transmission.