KR100403849B1 - Method for vidio phone voice circuit system using analog phone - Google Patents

Abstract

The present invention relates to a video telephone voice circuit system using an analog telephone. In particular, by configuring a multiplexer circuit using an analog telephone and a voice chip, an initial voice call using an analog telephone relates to a video telephone voice circuit system using an analog telephone.

Conventional video telephones use the phone function of the modem during analog calls, and the analog phone operates only when power is not supplied to the modem during power failure, but it takes a certain time before the call is initiated. By using an analog phone, the video / controller eliminates the process of initializing the modem while the video / control unit is in a standby state, thereby providing a video phone voice circuit system capable of immediately making a call without delay.

Description

Video phone voice circuit system using analog phone {Method for vidio phone voice circuit system using analog phone}

The present invention relates to a video telephone voice circuit system using an analog telephone. In particular, by configuring a multiplexer circuit using an analog telephone and a voice chip, an initial voice call using an analog telephone relates to a video telephone voice circuit system using an analog telephone.

General video telephones use Modem's Phone function for analog telephone calls, and analog telephones operate when power is not supplied to the modem during power failure.

A conventional video telephone voice circuit system is described as follows.

1 is a diagram of a conventional video telephone voice circuit system.

As shown in Fig. 1, a voice circuit of a conventional video telephone is outputted from a relay switch 7 and a voice section 10 connected by a telephone line for switching the modem 6 and the external telephone 12. D / A converter 8 for converting a digital voice signal into an analog voice signal, and a second analog and audio signal output from the modem 6 and the analog voice signal output from the modem 6, respectively. 1 Multiplexer (1), and the muxing process, the hand-set (3), the speaker (SPK-Phone) (4) to receive the audio signal output from the first multiplexer (1) The second multiplexer (2) and the first channel of the second multiplexer (2) for muxing the microphone signal output from the external audio input / output unit (5) to the 5th, 6th, and 7th channels External speech to output muxed voice signal to voice, to be output to channel 2, channel 3 Hand-set (3) and SPK-Phone (3), which supplies the microphone signal which is input from the outside and input to the 5th, 6th, 7th channel of the second multiplexer 4) Converts the analog audio signal which has been muxed so that the audio signal input from the EXT 5 and the second multiplexer 2 through the channel 4 of the first multiplexer 1 is converted into a digital audio signal. A voice packet by receiving an A / D conversion unit 9, a voice processing unit 10 for compressing the converted digital voice signal, and a compressed digital voice signal output from the voice processing unit 10. (Packet), the video / control unit 11 for generating a video packet by receiving and compressing the video signal, and a modem for receiving and transmitting the video packet signal output from the video / controller 10 (6) It is composed of

Here, the conventional video phone has a relay switch 7 connected to the external phone 12 when the power is not connected, so that a voice call can be made with the external phone. Press to make a digital video call.

That is, in the case of a voice call, the microphone signal is input to the hand-set 3, the SPK-phone 4, and the EXT 5 through the second multiplexer 2, respectively. When the second multiplexer 2 muxes the input microphone signal, the second multiplexer 2 supplies the muxed signal to the first multiplexer 1.

The first multiplexer 1 inputs the input muxed signal to the microphone of the modem 6 through channel 3 and transmits the analog voice signal through the telephone line.

In addition, when a video call is to be made after the voice call is completed, a microphone signal is input to channel 1 of the first multiplexer 1, and the A / D conversion unit converts the audio signal that has been muxed to be output to channel 4. The digital voice signal is converted into the digital voice signal at 9 and input to the voice unit 10.

The voice unit 10 compresses the input digital voice signal and converts the digital voice signal into a voice packet signal to be input to the image / control unit 11. The video / control unit 11 supplied with the audio packet signal inputs a digital video signal generated by muxing the video packet signal and the audio packet signal to the modem 6, and the modem ( The digital video signal inputted in 6) is transmitted to the video telephone of the other party through the telephone line, whereby video call is possible.

In addition, in order to receive the voice signal of the other party during digital communication and output the voice, the voice packet signal transmitted from the other party is input to the modem 6 through a telephone line, and is a digital compressed signal input to the modem 6. The audio packet signal is demultiplexed by the image / control unit 11 and input to the audio unit 10.

The voice unit 10 releases the input demultiplexed digital compressed signal, generates a digital voice signal, and supplies the digital voice signal to the D / A converter 8. The D / A converter 8 converts the digital voice signal supplied from the voice unit 10 into an analog voice signal and inputs the converted analog voice signal to channel 1 of the first multiplexer 1. .

The first multiplexer 1 supplies the analog audio signal inputted to the first channel to the second multiplexer 2, and the second multiplexer 2 supplies the supplied analog audio signal to the first channel, the second channel, As it is output from channel 3, it is muxed and supplied to the hand-set (3), the speaker (SPK-Phone) (4), and the speaker of the external audio input / output unit (EXT). The other party's voice is output.

In this case, the video phone uses the phone function of the modem when making an analog call, and the analog phone is controlled to operate when the power is not supplied to the modem during a power failure.

However, the conventional video phone uses the phone function of the modem during analog calls, and the analog phone is implemented to operate only when the power is not supplied to the modem during a power failure, so that the modem and the video / control unit are used to make a call with the other party. There is a problem that it takes a certain time before the call is initiated because the modem is initialized in the stand-by state is supplied.

In addition, when receiving a voice signal from the sender during a telephone call, the modem receives a ring and transmits it to the video / control unit, and then the ring signal sounds only when it is transmitted from the video / control unit to the audio unit. There is a problem that a certain time is delayed until a call occurs because a ring tone occurs on the phone.

The present invention is to solve the problems of the prior art, an object of the present invention by using an analog phone during the initial call, because there is no need to initialize the modem in the standby state of the video / control unit without a delay of a certain time It's about making a phone call.

Another object of the present invention is to add a ring generating circuit to an analog telephone, so that a ring tone can be immediately generated in the telephone at the receiving side without delay for a predetermined time.

As a technical idea for achieving the present invention,

An analog telephone for receiving a telephone line signal switched and switched by a relay switch for switching between a modem and an analog telephone, a modem for receiving a voice output signal output from the analog telephone, a channel 5 of a fourth multiplexer, and a handset in case of power failure A fourth multiplexer for inputting the analog voice signal converted by the D / A converter into channels 6 and 7 and performing a muxing process to output the terminal B to the terminal B and the terminal B of the fourth multiplexer; A third multiplexer configured to receive a speaker signal to be output to the terminal A and perform a muxing process so that the voice is output to the voice input / output means, and receives the voice signal of the other party,

A third multiplexer for receiving a microphone input signal for generating a microphone input signal and a muxing process for receiving a microphone input signal inputted from the voice input / output means from a channel 5, a channel 6, or a channel 7 and outputting it to the terminal B; And a fourth multiplexer receiving the microphone input signal output from the B terminal of the third multiplexer through channel 1, and an A converting the microphone input signal output from the B terminal of the third multiplexer into a digital voice signal. A / D converter, a voice processor for receiving a digital voice signal output from the A / D converter, a D / A converter for receiving a digital voice signal output from the voice processor and converting the digital voice signal into an analog voice signal; A fourth multiplexer which receives an analog audio signal output from the D / A converter through channel 2 and performs a muxing processing to output the signal to terminal A; A system for transmitting a voice signal comprising an analog telephone receiving an analog voice output signal output from the A terminal of the fourth multiplexer is provided.

In another embodiment of the present invention, when there is no analog telephone, the modem receives a voice signal (transmission side voice signal) through a telline, and receives a modem speaker voice output signal output from the modem through channel 5. A sixth multiplexer for muxing the output to terminal B and a modem speaker audio output signal output from the terminal B of the sixth multiplexer as a terminal A for muxing to be output to the voice input / output means; A fifth multiplexer, a fifth multiplexer configured to receive a microphone input signal inputted from the voice input / output means from a 5th channel, a 6th channel, or a 7th channel and output a mux to the terminal B; and the 5th multiplexer A sixth multiplexer receiving the microphone input signal outputted from the B terminal through the first channel, and an output from the B terminal of the fifth multiplexer An A / D converter for converting a microphone input signal into a digital voice signal, a voice processor for generating a voice signal bypass and DTMF during an analog call of the digital voice signal output from the A / D converter, and the voice D / A converter that receives the digital voice signal output from the processing unit and converts it into analog voice signal, and inputs the analog voice signal output from the D / A converter to channel 2 and outputs it to A terminal. The present invention provides a system for transmitting a voice signal including a sixth multiplexer, and a modem (6 ″) that receives and transmits an analog voice signal output from the A terminal of the sixth multiplexer.

1 is a conventional video telephone voice circuit system diagram.

2 is a schematic video telephone voice circuit system diagram for performing a voice call without using a delay for a predetermined time using the analog telephone of the present invention.

3 is a schematic video telephone voice circuit system diagram for performing a voice call in the absence of an analog telephone according to another embodiment of the present invention.

<Code Description of Main Parts of Drawing>

1: first multiplexer 2: second multiplexer

3,3 ′, 3 ″: Handset 4,4 ′, 4 ″: Speak-phone

5,5 ′, 5 ″: External audio input / output part 6,6 ′, 6 ″: Modem

7,7 ′: Relay switch 8,8 ′, 8 ″: D / A converter

9,9 ′, 9 ″: A / D converter 10,10 ′, 10 ″: Voice part

11,11 ′, 11 ″: Video / control unit 12: External telephone

13: third multiplexer 14: fourth multiplexer

15 analog phone 16 handset connection in case of power failure

17: fifth multiplexer 18: sixth multiplexer

In general, video phones make calls using regular telephone lines, so when making an initial call, make a general call, which is an analog call, and make a video call only when both phone calls have a video phone. If both parties want to make a video call, they enter a specific key, such as the video switch key provided on the keyboard of the videophone, to make a data call through a modem and connect to H.324 to make a video call. Lose.

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

2 is a schematic video telephone voice circuit system diagram for performing a voice call without delay of a predetermined time using the analog telephone of the present invention.

As shown in Fig. 2, the modem 6 'and the analog telephone 15 are switched between the telephone line and the relay switch 7' for outputting the telephone line signal, and the telephone line signal output from the relay switch 7 '. The analog telephone 15 which receives the input and produces the audio output signal, and the audio output signal which are output from the analog telephone 15 are transmitted to the 5th channel of the modem 6 'and the 4th multiplexer 14, and at the time of power failure, a handset- Receiving an input to the connecting unit 16, the voice unit 10 'is a D / A converter (8') and receives the signal is restored to the audio compression outputted above and converted to an analog voice signal, and the D / A third multiplexer receiving the speaker signal outputted through the B terminal of the fourth multiplexer 14 which receives the analog audio signal output from the A converter 8 'through the 6th channel and the 7th channel; 13) and the speaker signal input to the A stage of the third multiplexer 13 is 1 time. It is muxed to be output to the channel, or it is muxed to be output to the external voice input / output unit 5 'which is an external speaker and a microphone, or it is muxed to be output to the 4th channel and the speaker-phone 4 Output to the external speaker of ′).

Here, the voice which is a micro input among the hand-set (3 '), the speaker-phone (4') and the EXT (5 ') is input from the 5th, 6th, or 7th channel of the third multiplexer 13. The microphone input signal that is muxed and output to the B terminal of the third multiplexer 13 is input to the first channel of the fourth multiplexer 14 and is also output from the B terminal of the third multiplexer. The A / D converter 9 'converts an input signal into a digital voice signal, and the voice processor 10' receives a digital voice signal output from the A / D converter 9 '.

The digital voice signal output from the voice processor 10 'is input to the D / A converter 8' and output as an analog voice signal, which is output to channel 2 of the fourth multiplexer 14. A muxing process is performed to be input and output to terminal A. The analog audio output signal output from terminal A of the fourth multiplexer 14 is input to the analog telephone 15, and the hand-set connection unit 16 is provided in case of power failure. The microphone input signal of) is also input to the microphone of the analog telephone 15.

The digital audio signal during the digital call is input to the video / control unit 11 'through the audio processing unit 10' to generate a video signal, and the packetization generated by muxing the generated video signal to H.223 standard. The packetized stream is transmitted to the telephone line via the modem 6 '.

When making a voice call with the handset 3 'during the first voice call, the selector of the third multiplexer 13 is connected to the first and fifth times, and the speaker signal of the analog telephone 15 is connected to the third multiplexer ( 13 is inputted to channel 5 of the third multiplexer 13 to be output to the B terminal of the third multiplexer 13, and the speaker signal output from the B terminal of the third multiplexer 13 is inputted to No. 1 of the fourth multiplexer 14. Is inputted to the A terminal of the fourth multiplexer 14, and is input to the microphone of the analog telephone 4 so as to perform an initial voice call.

The video data necessary for making a video call, which is a digital call, is converted into stream data by performing video encoding on the video / control unit 11 ', which receives video information from the camera, and then converting the converted stream data and the audio processor 10'. ) Transmits the audio encoding stream inputted from the Mx and the muxed signal to the H.233 standard generated through the modem 6 '.

In the digital call according to the present invention, when the voice call is conducted to the handset 3 ', the voice path of the third multiplexer 13 is set to mux selector as in the analog call. The microphone signal output of the third multiplexer 13 is input to the A / D converter 9 ', converted into a digital voice signal, and input to the voice processing section 10'. The audio processing unit 10 'inputs the input digital audio signal to the video / control unit 11' by audio encoding, and the video / control unit 11 'muxes the input audio encoded digital audio signal and the digital video signal. To the other party's video telephone via the modem 6 '.

Also, in order to listen to the voice of the other party through the hand-set 3 ', the digital stream inputted through the modem 6' is separated into an audio signal and a video signal by the image / control unit 11 ', and among the separated signals. The voice signal is supplied to the voice processor 10 '.

The voice processing unit 10 'converts the input voice signal into a digital voice signal and inputs it to the D / A converter 8', and the D / A converter 8 'converts the input digital voice signal into an analog voice signal. The conversion is input to the seventh channel of the fourth multiplexer 14, and the fourth multiplexer 14 muxes the analog audio signal input to the seventh channel to be output to the B terminal of the fourth multiplexer 14.

The analog audio signal output from the B terminal of the fourth multiplexer 14 is input to the A terminal of the third multiplexer 13 and muxed to be output to the first channel of the third multiplexer 13.

The analog audio signal output to channel 1 of the third multiplexer 13 is configured to be input to the hand-set 3 'and output to the speaker of the hand-set 3'.

When switching from an analog call to a digital call, the relay switch 7 'is switched when the video key is pressed on the video phone, so that the tel-line switches from the analog phone 15 to the modem 6'. And a digital call is made through the modem 6 '.

In addition, the hand-set connection 16 shows a structure connected to the output of the microphone and speaker connected to the analog telephone 15 in the case of power failure.

The key input shown in FIG. 2 is a key required for an analog phone call, and has a structure in which only keys necessary for a digital video and a voice call are connected to the video / control unit 11 'to receive an input.

In this case, when the keys used for the analog telephone 15 are needed by the video / control unit 11 ', when a key connected to the analog telephone 11' is pressed, DTMF (Dual Tone Multi Frequency) is generated and a modem ( 6 ') is connected to the speaker output of the analog telephone 15, the modem can recognize the key and transmit it to the image / control unit (11').

3 is a schematic video telephone voice circuit system diagram for performing a voice call in the absence of an analog telephone according to another embodiment of the present invention.

The action generated by the same components as in FIG. 2 will be omitted.

As shown in Fig. 3, the tel-line is directly connected to the modem 6 ″ with the analog telephone removed from the component, and the speaker output of the modem 6 ″ is connected to channel 5 of the sixth multiplexer 18. Is inputted into the B terminal of the sixth multiplexer 18, and is muxed, and the microphone input audio signal outputted to the A terminal of the sixth multiplexer 18 is input to the first channel of the modem 6 ″. .

When a video telephone without an analog telephone is configured, all key inputs are processed through the video / control unit 11 ″, and an initial analog call is made through the microphone and speaker of the modem 6 ″.

That is, during the voice call, the other party's voice is input to channel 5 of the sixth multiplexer 18 through the speaker of the modem 6 ″, and the inputted modem speaker audio output signal is the B terminal of the sixth multiplexer 18. The speaker output is configured by muxing so that the output is performed. The microphone input is an analog audio signal, which is a micro input signal output through the B terminal of the fifth multiplexer 17, and is input to the A / D converter 9 ″. The voice signal is converted into a voice signal and input to the voice processor 10 ″, and the voice processor 10 ″ receives the input digital voice signal by voice signal bypass and dual tone multi frequency (DTMF) during an analog call. The digital voice signal input to the voice processor 10 ″ is input to the D / A converter 10 ″, converted into an analog voice signal, and input to channel 1 of the sixth multiplexer 18. The analog audio signal input to the first channel of the sixth multiplexer 18 is muxed to be output to the A terminal of the sixth multiplexer 18.

The analog audio signal output from the A terminal of the sixth multiplexer 18 is input to the microphone of the modem 6 ″.

That is, the microphone signal input to the modem 6 ″ is looped back by the voice processing unit 10 ″ and transmitted to the modem 6 ″.

In addition, when the voice processing unit 10 ″ generates DTMF and makes a call through the modem 6 ″, it is possible to adjust different DTMF levels for each country.

As described above, the present invention has the effect that the initial call can be made without the delay of the time to start the telephone call by using an analog phone during the initial call.

In addition, by adding a ring generating circuit to the analog phone, it has the effect of generating a ringtone without time delay.

Claims (5)

Voice signal receiving unit that receives the transmitting voice signal and outputs it as voice using analog telephone, and voice signal transmitting unit converts the receiving voice into voice signal and outputs it as voice signal using analog telephone. An audio circuit system of a video telephone to perform; The voice signal receiver, An analog telephone which receives a telephone line signal which is switched and input by a relay switch which switches between a modem and an analog telephone; A modem for receiving a voice output signal output from the analog telephone, a channel 5 of a fourth multiplexer, and a handset connection unit in case of power failure; A fourth multiplexer which receives the analog voice signal converted by the D / A converter through channels 6 and 7 and performs a muxing processing to output the B terminal; And a third multiplexer configured to receive a speaker signal output from the B terminal of the fourth multiplexer as the A terminal, and to perform a muxing process so that the voice output is performed by the voice input / output means. system. delete The method according to claim 1, wherein the voice input and output means, A video telephone voice circuit system using an analog telephone, comprising: a hand-set, an external voice input / output unit, and a speaker-phone. The method of claim 1, wherein the voice signal transmitter, Voice input and output means for generating a microphone input signal; A third multiplexer which receives a microphone input signal inputted from the voice input / output means and inputs one of a fifth channel, a sixth channel, or a seventh channel, and performs a muxing process to output the terminal B to a terminal B; A fourth multiplexer configured to receive a microphone input signal output from the B terminal of the third multiplexer through a first channel; An A / D converter for converting a microphone input signal output from the B terminal of the third multiplexer into a digital voice signal; A voice processor for receiving a digital voice signal output from the A / D converter; A D / A converter for receiving a digital voice signal output from the voice processor and converting the digital voice signal into an analog voice signal; A fourth multiplexer which receives an analog audio signal output from the D / A converter through a second channel and performs a muxing process to output the same to the A terminal; And an analog telephone for receiving an analog audio output signal output from the A terminal of the fourth multiplexer. A modem for receiving a voice signal (transmitter voice signal) through a telline; A sixth multiplexer which receives a modem speaker audio output signal outputted from the modem through channel 5 and performs a muxing processing to output the signal to terminal B; A fifth multiplexer which receives a modem speaker voice output signal outputted from terminal B of the sixth multiplexer as a terminal A and performs a muxing process to output voice to voice input / output means; A fifth multiplexer configured to receive a microphone input signal input from the voice input / output means from a channel 5, a channel 6, or a channel 7 and perform a muxing process to output the terminal B to a terminal B; A sixth multiplexer which receives the microphone input signal output from the B terminal of the fifth multiplexer through channel 1; An A / D converter for converting a microphone input signal output from the B terminal of the fifth multiplexer into a digital voice signal; A voice processor for generating a voice signal bypass and DTMF during an analog call of the digital voice signal output from the A / D converter; A D / A converter for receiving a digital voice signal output from the voice processor and converting the digital voice signal into an analog voice signal; A sixth multiplexer which receives an analog audio signal output from the D / A converter through a second channel and performs a muxing process to output the same to the A terminal; A video telephone voice circuit system using an analog telephone, characterized in that it comprises a modem for receiving an analog audio signal output from the A terminal of the sixth multiplexer and transmitting it to the microphone.