CN1479511A - Three way modulator and demodulator and method of realizing common telephone and IP telephone three-side talking - Google Patents
Three way modulator and demodulator and method of realizing common telephone and IP telephone three-side talking Download PDFInfo
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- CN1479511A CN1479511A CNA021293198A CN02129319A CN1479511A CN 1479511 A CN1479511 A CN 1479511A CN A021293198 A CNA021293198 A CN A021293198A CN 02129319 A CN02129319 A CN 02129319A CN 1479511 A CN1479511 A CN 1479511A
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Abstract
A channel control switch for controlling modem to switch to audio frequency processing state or general modem state is setup in general modem. In audio frequency processing state, three ways modem converts audio frequency data received by computer to voice analog signal, and mixes the said voice analog signal with general telephone voice analog signal. Meanwhile, three-way modem also converts common telephone voice analog signal to audio frequency data sent to computer. Dialing general telephone and dialing IP phone by computer using dialing software through network card and cable modem etc. as well as mixing voices of three parties through three-way modem realizes communication among three parties. The invention saves telephone fees without affecting quality of connection for data communication and general telephone under general modem state.
Description
Technical field
The present invention relates to the method for a kind of three way modulator and demodulator and realization plain old telephone and IP phone Three-Way Calling.
Technical background
At present, common modulator-demodulator has connected local exchange switch, the data/address bus of computer and public switch telephone network (PSTN), just usually said common telephone network, its main function is to carry out data communication: after the modulator-demodulator of the modulator-demodulator of computer this locality and common telephone network far-end is set up data link, the data that modulator-demodulator transmits needs according to set modulation algorithm data-modulated on the audio signal of common standard frequency, that is to say with this audio signal and make carrier wave, convert analog signal to through digital to analog converter again, be transferred on the far-end modulator-demodulator by common telephone network; The far-end modulator-demodulator is demodulated to data to this analog signal by opposite process, passes to far-end computer, thereby realizes data communication.Do not carrying out under the situation of data communication, local exchange switch is equivalent to directly link to each other with common telephone network, normally dials plain old telephone.
Though modulator-demodulator has connected three-line: the data/address bus of local exchange switch, computer and common telephone network, but point at one time, can only have wherein two circuits connect and carry out communication, promptly have only two kinds of functional statuses: telephone set is connected with common telephone network and carries out common voice conversation; Computer is connected with common telephone network and carries out data communication, comprise dial up on the telephone, calling IP phone etc.Like this, point can only realize that telephone set and common telephone network carry out common voice conversation at one time, or the earphone that uses a computer, microphone carry out the IP phone conversation by modulator-demodulator, can't realize plain old telephone and IP phone Three-Way Calling.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of three way modulator and demodulator and realizes the method for plain old telephone and IP phone Three-Way Calling with it, realizes plain old telephone and IP phone Three-Way Calling.
For achieving the above object, technical scheme of the present invention specifically is achieved in that
A kind of three way modulator and demodulator, comprise bus control circuit, digital signal processing circuit, digital-to-analogue/analog to digital conversion circuit and interface circuit, described bus control circuit will be delivered to digital signal processing circuit from the digital signal that computer receives by the standard pci bus, maybe will send to computer from the digital signal that digital signal processing circuit receives; Digital signal processing circuit is modulated at digital signal on the audio signal of common standard frequency according to modulation algorithm, sends to digital-to-analogue/analog to digital conversion circuit, or the signal of the modulation that will receive from digital-to-analogue/analog to digital conversion circuit according to demodulating algorithm carries out demodulation; Digital-to-analogue/analog to digital conversion circuit becomes analog signal to send to interface circuit the conversion of signals of modulating maybe will send to digital signal processing circuit for the signal of modulating from the analog signal conversion that interface circuit receive; Interface circuit to common telephone network or receive the analog signal that common telephone network sends, is characterized in that analog signal transmission:
Described three way modulator and demodulator further comprises the passage control switch that a control modulator-demodulator switches to the Audio Processing state, this switch produces the channel switch signal and this signal is sent to bus control circuit, described bus control circuit receives that passage opens signal, three way modulator and demodulator is switched to the Audio Processing state, and will deliver to digital signal processing circuit from the voice data that computer receives by the standard pci bus, maybe will send to computer from the voice data that digital signal processing circuit receives; Digital signal processing circuit changes into audio signal according to the audio decoder algorithm with voice data, send to digital-to-analogue/analog to digital conversion circuit, or will change into voice data and send to bus control circuit from the digital-to-analogue/audio signal of analog to digital conversion circuit reception according to the audio coding algorithm; Digital-to-analogue/analog to digital conversion circuit converts audio signal to voice analog signal and sends to interface circuit, maybe will be converted to audio signal from the voice analog signal that interface circuit receives and send to digital signal processing circuit; Interface circuit mixes voice analog signal with the plain old telephone voice analog signal, and the analogue voice signal that mixes is transferred to common telephone network, or receives the voice analog signal from common telephone network.
Above-mentioned interface circuit can directly link to each other the incoming end of common telephone network, digital-to-analogue/analog to digital converter with telephone set three ends.
Above-mentioned passage control switch can be the software instruction switch, and it sends to three way modulator and demodulator by computer with switch, also can be the hardware jumper switch of three way modulator and demodulator.
A kind of method that realizes plain old telephone and IP phone Three-Way Calling is characterized in that, this method is used the described three way modulator and demodulator of claim 1, comprises following step:
1) computer that will be used for calling IP phone is installed three way modulator and demodulator, and telephone set and common telephone network telephone wire are connected to three way modulator and demodulator, uses telephone set to dial plain old telephone or answer plain old telephone;
2) open the passage control switch of three way modulator and demodulator, three way modulator and demodulator is switched to the Audio Processing state;
3) computed IP phone dialer software is put through IP phone by network access equipment;
4) computer sends to three way modulator and demodulator with the voice data that IP phone receives, and three way modulator and demodulator is converted to voice analog signal with this voice data to be mixed with the plain old telephone voice analog signal, and telephone set is listened to the voice analog signal of mixing;
Simultaneously, by three way modulator and demodulator the voice analog signal of plain old telephone both call sides is converted to voice data and sends to computer, computer sends to IP phone with this voice data.
The method of above-mentioned Three-Way Calling can comprise: the voice data that computer receives IP phone carries out telephonograph or/and the voice data that three way modulator and demodulator sends saves as audio data file.
By such scheme as can be seen, key of the present invention is: common modulator-demodulator is provided with the passage control switch that a control modulator-demodulator switches to the Audio Processing state, at the Audio Processing state, three way modulator and demodulator is converted to voice analog signal with voice data, this signal mixes with the plain old telephone voice analog signal, by this three way modulator and demodulator the plain old telephone voice analog signal is converted to voice data simultaneously and sends to computer; Put through plain old telephone, use the IP phone dialer software to put through IP phone by computer again by other network access equipments such as network interface card, cable modems, by three way modulator and demodulator tripartite speech is mixed, realization telephone set and plain old telephone and IP phone are carried out Three-Way Calling.
Therefore, three way modulator and demodulator provided by the present invention and with its method that realizes plain old telephone and IP phone Three-Way Calling, realized a telephone set carry out plain old telephone when conversing and IP phone carry out Three-Way Calling.The method of Three-Way Calling of the present invention does not need the support of local side switch, realizes simple; Owing among the three parts of conversation, have a side to be IP phone, use so can save long-distance telephone bill.Simultaneously, do not influence data communication under common modem state and plain old telephone conversation speech quality.
Description of drawings
Fig. 1 is the structural representation of the three way modulator and demodulator of a preferred embodiment of the present invention;
Fig. 2 carries out the schematic diagram of plain old telephone and IP phone Three-Way Calling for using three way modulator and demodulator shown in Figure 1.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, by the following examples, and with reference to accompanying drawing, the present invention is described in more detail.
Referring to Fig. 1, the structural representation of the three way modulator and demodulator of a preferred embodiment of the present invention, it comprises that bus control circuit 101, digital signal processing circuit 102, digital-to-analogue/analog to digital conversion circuit 103, interface circuit 104 and control modulator-demodulator switch to the passage control switch of Audio Processing state or common modem state.Present embodiment passage control switch is the software switch that adopts, and in the volume control group of computer, has increased a passage control switch.This software channel switch also can accomplish in the IP dialer software, makes itself and IP dialer software interlock.When this switch opens, promptly open instruction to 101 passages of bus control circuit of three way modulator and demodulator, after bus control circuit 101 is received this instruction, three way modulator and demodulator is switched to the Audio Processing state.This channel switch also can adopt hardware switch, for example, a wire jumper is set on three way modulator and demodulator, conducting is the Audio Processing state, otherwise be common modem state, when powering on, by bus control circuit 101 detect its whether conducting judge the state of three way modulator and demodulator.
When three way modulator and demodulator is operated in common modem state: bus control circuit 101 will be delivered to digital signal processing circuit 102 from the digital signal that computer receives by the standard pci bus, maybe will send to computer from the digital signal that digital signal processing circuit 102 receives; Digital signal processing circuit 102 is modulated at digital signal on the audio signal of common standard frequency according to modulation algorithm, send to digital-to-analogue/analog to digital conversion circuit 103, or the signal of the modulation that will receive from digital-to-analogue/analog to digital conversion circuit 103 according to demodulating algorithm carries out demodulation; Digital-to-analogue/analog to digital conversion circuit 103 becomes analog signal to send to interface circuit 104 conversion of signals of modulation, maybe will send to digital signal processing circuit 102 for the signal of modulating from the analog signal conversion that interface circuit 104 receives; Interface circuit 104 with analog signal transmission to common telephone network or receive the analog signal that common telephone network sends.
When three way modulator and demodulator is operated in the Audio Processing state: bus control circuit 101 will be delivered to digital signal processing circuit 102 from the voice data that computer receives by the standard pci bus, maybe will send to computer from the voice data that digital signal processing circuit 102 receives; Digital signal processing circuit 102 changes into audio signal according to the audio decoder algorithm with voice data, send to digital-to-analogue/analog to digital conversion circuit 103, or will change into voice data from the audio signal that digital-to-analogue/analog to digital conversion circuit 103 receives according to the audio coding algorithm and send to bus control circuit 101; Digital-to-analogue/analog to digital conversion circuit 103 converts audio signal to voice analog signal and sends to interface circuit 104, maybe will be converted to audio signal from the voice analog signal that interface circuit 104 receives and send to digital signal processing circuit 102; Interface circuit 104 mixes voice analog signal with the plain old telephone voice analog signal, and the analogue voice signal that mixes is transferred to common telephone network, or receives the voice analog signal from common telephone network.
Referring to Fig. 2, use three way modulator and demodulator shown in Figure 1 to carry out the schematic diagram of plain old telephone and IP phone Three-Way Calling.As shown in Figure 2, computer 201 has connected three way modulator and demodulator 205 and network interface card or cable modem 202 by the standard pci interface, network interface card or cable modem 202 are connected with IP network 203, and three way modulator and demodulator 205 has connected local exchange switch 206 and common telephone network 207.
The process of Three-Way Calling is: at first, use local exchange switch 206 to dial plain old telephone, for example dial the other side for telephone set 208 or answer plain old telephone 208, also can transfer by common telephone network and dial mobile phone.Then, open the passage control switch of three way modulator and demodulator 205, three way modulator and demodulator 205 is switched to the Audio Processing state.The IP phone dialer software that re-uses computer 201 is put through IP phone by network interface card or cable modem 202, for example dials the other side and is telephone set 204, and the other side also can be computer.Then, computer 201 will be from the voice data of IP phone 204 receptions by software, send to three way modulator and demodulator 205, three way modulator and demodulator 205 is converted to voice analog signal with this voice data to be mixed with the plain old telephone voice analog signal, and telephone set 206,208 is listened to the voice analog signal of mixing.Simultaneously, three way modulator and demodulator 205 is with the plain old telephone both call sides---and the voice analog signal of telephone set 206 and telephone set 208 is converted to voice data and sends to computer 201, computer 201 sends to IP phone 204 by software with this voice data, and telephone set 204 is listened to the speech of telephone set 206 and 208.
In the process of Three-Way Calling, the voice data that computer can also receive IP phone by recording software carries out telephonograph or/and the voice data that three way modulator and demodulator sends saves as audio data file.
Do not carrying out Three-Way Calling, but when using network interface card or cable modem calling IP phone, can not adopt earphone, the microphone of computer to listen to and talk with, but by three way modulator and demodulator, listening to and talk with the telephone set of this locality.Its process is: open the passage control switch of three way modulator and demodulator 205, three way modulator and demodulator 205 is switched to the Audio Processing state, if computer 201 existing sound cards are then closed it in order to avoid disturb.The IP phone dialer software that re-uses computer 201 is put through IP phone by network interface card or cable modem 202.Then, computer 201 will send to three way modulator and demodulator 205 from the voice data of IP phone 204 receptions by software, and three way modulator and demodulator 205 is converted to voice analog signal with this voice data and sends to local exchange switch 206.Simultaneously, local exchange switch 206 sends voice analog signal to three way modulator and demodulator 205, three way modulator and demodulator 205 is a voice data with this conversion of signals, software by computer 201 sends to IP phone 204, just can converse by local exchange switch 206 and IP phone 204, computer 201 also can use recording software to record during the conversation.Like this, can dial plain old telephone by common telephone network, can carry out the IP conversation by the IP network that is connected with computer again, more meet user's use habit with same phone.
This shows, three way modulator and demodulator of the present invention and with its method that realizes plain old telephone and IP phone Three-Way Calling, realized a telephone set carry out plain old telephone when conversing and IP phone carry out Three-Way Calling.The method of Three-Way Calling of the present invention does not need the support of local side switch, realizes simple.Owing among the three parts of conversation, have a side to be IP phone, use so can save long-distance telephone bill.Simultaneously, the present invention does not influence its data communication under common modem state and the speech quality of plain old telephone conversation.
Claims (6)
1, a kind of three way modulator and demodulator, comprise bus control circuit, digital signal processing circuit, digital-to-analogue/analog to digital conversion circuit and interface circuit, described bus control circuit will be delivered to digital signal processing circuit from the digital signal that computer receives by the standard pci bus, maybe will send to computer from the digital signal that digital signal processing circuit receives; Digital signal processing circuit is modulated at digital signal on the audio signal of common standard frequency according to modulation algorithm, sends to digital-to-analogue/analog to digital conversion circuit, or the signal of the modulation that will receive from digital-to-analogue/analog to digital conversion circuit according to demodulating algorithm carries out demodulation; Digital-to-analogue/analog to digital conversion circuit becomes analog signal to send to interface circuit the conversion of signals of modulating maybe will send to digital signal processing circuit for the signal of modulating from the analog signal conversion that interface circuit receive; Interface circuit to common telephone network or receive the analog signal that common telephone network sends, is characterized in that analog signal transmission:
Described three way modulator and demodulator further comprises the passage control switch that a control modulator-demodulator switches to the Audio Processing state, this switch produces the channel switch signal and this signal is sent to bus control circuit, described bus control circuit receives that passage opens signal, three way modulator and demodulator is switched to the Audio Processing state, and will deliver to digital signal processing circuit from the voice data that computer receives by the standard pci bus, maybe will send to computer from the voice data that digital signal processing circuit receives; Digital signal processing circuit changes into audio signal according to the audio decoder algorithm with voice data, send to digital-to-analogue/analog to digital conversion circuit, or will change into voice data and send to bus control circuit from the digital-to-analogue/audio signal of analog to digital conversion circuit reception according to the audio coding algorithm; Digital-to-analogue/analog to digital conversion circuit converts audio signal to voice analog signal and sends to interface circuit, maybe will be converted to audio signal from the voice analog signal that interface circuit receives and send to digital signal processing circuit; Interface circuit mixes voice analog signal with the plain old telephone voice analog signal, and the analogue voice signal that mixes is transferred to common telephone network, or receives the voice analog signal from common telephone network.
2, three way modulator and demodulator as claimed in claim 1 is characterized in that: described interface circuit directly links to each other the incoming end of common telephone network, digital-to-analogue/analog to digital converter with telephone set three ends.
3, three way modulator and demodulator as claimed in claim 1 is characterized in that: described passage control switch is the software switch instruction, and it sends to three way modulator and demodulator by computer.
4, three way modulator and demodulator as claimed in claim 1 is characterized in that: described passage control switch is the jumper switch on the three way modulator and demodulator.
5, a kind of method that realizes plain old telephone and IP phone Three-Way Calling is characterized in that, this method is used the described three way modulator and demodulator of claim 1, comprises following step:
1) computer that will be used for calling IP phone is installed three way modulator and demodulator, and telephone set and common telephone network telephone wire are connected to three way modulator and demodulator, uses telephone set to dial plain old telephone or answer plain old telephone;
2) open the passage control switch of three way modulator and demodulator, three way modulator and demodulator is switched to the Audio Processing state;
3) computed IP phone dialer software is put through IP phone by another network access equipment;
4) computer sends to three way modulator and demodulator with the voice data that IP phone receives, and three way modulator and demodulator is converted to voice analog signal with this voice data to be mixed with the plain old telephone voice analog signal, and telephone set is listened to the voice analog signal of mixing;
Simultaneously, by three way modulator and demodulator the voice analog signal of plain old telephone both call sides is converted to voice data and sends to computer, computer sends to IP phone with this voice data.
6, the method for Three-Way Calling as claimed in claim 5, it is characterized in that, this method further comprises: the voice data that computer receives IP phone carries out telephonograph or/and the voice data that three way modulator and demodulator sends saves as audio data file.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129319 CN1221121C (en) | 2002-08-30 | 2002-08-30 | Three way modulator and demodulator and method of realizing common telephone and IP telephone three-side talking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02129319 CN1221121C (en) | 2002-08-30 | 2002-08-30 | Three way modulator and demodulator and method of realizing common telephone and IP telephone three-side talking |
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| Publication Number | Publication Date |
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| CN1479511A true CN1479511A (en) | 2004-03-03 |
| CN1221121C CN1221121C (en) | 2005-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02129319 Expired - Fee Related CN1221121C (en) | 2002-08-30 | 2002-08-30 | Three way modulator and demodulator and method of realizing common telephone and IP telephone three-side talking |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1741520B (en) * | 2005-09-12 | 2010-04-14 | 天津理工大学 | Network card of acoustic wave transmission address orthogonal coding with range measuring function and network card information processing method thereof |
| CN1859512B (en) * | 2005-07-07 | 2011-07-27 | 华为技术有限公司 | Method, system and device for realizing three-party talking in radio access in system |
| CN102970445A (en) * | 2012-11-19 | 2013-03-13 | 华为技术有限公司 | Voice communication system and voice communication device thereof |
| CN105035655A (en) * | 2015-07-20 | 2015-11-11 | 安徽省无为煤矿机械制造有限公司 | Briquette production line |
-
2002
- 2002-08-30 CN CN 02129319 patent/CN1221121C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1859512B (en) * | 2005-07-07 | 2011-07-27 | 华为技术有限公司 | Method, system and device for realizing three-party talking in radio access in system |
| CN1741520B (en) * | 2005-09-12 | 2010-04-14 | 天津理工大学 | Network card of acoustic wave transmission address orthogonal coding with range measuring function and network card information processing method thereof |
| CN102970445A (en) * | 2012-11-19 | 2013-03-13 | 华为技术有限公司 | Voice communication system and voice communication device thereof |
| CN102970445B (en) * | 2012-11-19 | 2016-08-24 | 华为技术有限公司 | Voice communication system and voice communication assembly thereof |
| CN105035655A (en) * | 2015-07-20 | 2015-11-11 | 安徽省无为煤矿机械制造有限公司 | Briquette production line |
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| Publication number | Publication date |
|---|---|
| CN1221121C (en) | 2005-09-28 |
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