CN103188576A - Analog interphone digitization achieving device - Google Patents
Analog interphone digitization achieving device Download PDFInfo
- Publication number
- CN103188576A CN103188576A CN2011104503970A CN201110450397A CN103188576A CN 103188576 A CN103188576 A CN 103188576A CN 2011104503970 A CN2011104503970 A CN 2011104503970A CN 201110450397 A CN201110450397 A CN 201110450397A CN 103188576 A CN103188576 A CN 103188576A
- Authority
- CN
- China
- Prior art keywords
- signal
- digital
- intercom
- unit
- dtmf
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Interconnected Communication Systems, Intercoms, And Interphones (AREA)
Abstract
The invention discloses an analog interphone digitization achieving device. The analog interphone digitization achieving device at the sending end comprises an analog-digital conversion unit, a band-pass filter, a pre-emphasis processing unit, an infra-acoustic generation unit, a limiter and a digital-to-analogue conversion unit. The analog interphone digitization achieving device at the receiving end comprises an analog-digital conversion unit, an infra-acoustic signaling detecting unit, an infra-acoustic frequency end syllable detecting unit, a deemphasis processing unit, a band-pass filter and a digital-to-analogue conversion unit. Due to the fact that digital processing is carried out on an analog signal input by the sending end of a analog interphone or an analog signal received by the receiving end of the analog interphone, a functioning pattern of the analog interphone can be compatible in a digital interphone so that intercommunity between the digital interphone and the analog interphone can be guaranteed.
Description
Technical field
The present invention relates to wireless communication technology field, particularly relate to a kind of simulation intercom Digital Realization device.
Background technology
At wireless communication technology field, intercom can be divided into simulation intercom and digital handset, wherein, traditional simulation intercom is a kind of communication mode that is modulated to intercom carrier frequency in the continuous wave mode voice, signaling, signal and optimization process such as amplifies, maturation possesses skills, system perfecting, advantage such as cost is relatively low; And digital handset is a kind of use digital modulation mode the communication carrier wave is handled, utilize the datumization communication mode of digital coding voice signal, compare with traditional simulation intercom, has the channel occupancy narrow bandwidth, the voice antijamming capability is strong, the advantage of better data processing and interface function can be provided, and is the inexorable trend of following intercom technical development.
Yet digital handset can not replace the simulation intercom at short notice, even in a very long time from now on, will be still based on the simulation intercom on the market.(in view of the simulation talkback system lacks the inhibition means of effectively disturbing, frequency spectrum uses state comparatively chaotic, be unfavorable for the reasonable utilization of Radio Resource, in order further to improve the availability of frequency spectrum, Ministry of Industry and Information issues No. 666 files " about the notice of 150MHz, the special-purpose intercom frequency planning of 400MHz frequency range and the relevant matters of use and management " in December, 2009, stop this frequency range simulation intercom model from January 1st, 2011 and check and approve.)
The defective of prior art is, because in the market still based on the simulation intercom, in the digitized process of intercom, digital handset can't substitute the simulation intercom immediately, existing digital handset can't compatible simulation intercom functional mode, therefore can't guarantee and simulate the function interoperability between the intercom, hinder the simulation intercom to seamlessly transitting between the digital handset.
Summary of the invention
The invention provides a kind of simulation intercom Digital Realization device, in order to solve the functional mode that digital handset in the prior art can't compatible simulation intercom, can't guarantee and simulate the function interoperability between the intercom, hinder the simulation intercom to the technical problem that seamlessly transits between the digital handset.
The present invention simulates intercom Digital Realization device, comprising:
AD conversion unit is converted to digital voice signal for the analogue voice signal that will simulate the input of intercom transmitting terminal;
Band pass filter is used for digital voice signal is carried out bandpass filtering, filters out the signal outside the speech bandwidth;
The preemphasis processing unit is used for that the signal that receives is carried out preemphasis and handles, and improves the signal high fdrequency component;
The subsonics generation unit is used for generating the infrasonic frequency signal according to the subsonics type of simulation intercom configuration;
Amplitude limiter is used for the infrasonic frequency signal and the digital signal after preemphasis is handled superposes and the digital signal after superposeing is carried out amplitude limiting processing;
D/A conversion unit is used for the digital signal after amplitude limiting processing is converted to analog signal.
The present invention simulates intercom Digital Realization device, comprising:
AD conversion unit is digital signal for the analog signal conversion that will simulate the reception of intercom receiving terminal;
Subsonics signaling detecting unit is used for detecting according to the infrasonic frequency signal of default subsonics signaling mode to described digital signal, when having target infrasonic frequency signal in detecting digital signal, opens the loud speaker of simulation intercom;
Infrasonic frequency last or end syllable detecting unit is used for starting last or end syllable when subsonics signaling detecting unit detects digital signal and has target infrasonic frequency signal and detects, and when detecting the last or end syllable of infrasonic frequency signal, closes the loud speaker of simulating intercom;
The processing unit that postemphasises is used for when the loud speaker of simulation intercom is in open mode, to the digital signal that receives processings of postemphasising, reduction signal high fdrequency component;
Band pass filter is used for filtering out the signal outside the speech bandwidth to carrying out bandpass filtering through the digital signal of postemphasising after handling;
D/A conversion unit is used for digital voice signal is converted to analogue voice signal and output.
In technical solution of the present invention, because the analog signal of simulation intercom transmitting terminal input or the analog signal of simulation intercom receiving terminal reception have been carried out digitized processing, can in digital handset, compatibility simulate the functional mode of intercom, thereby guarantee the interoperability of function between digital handset and the simulation intercom.
Description of drawings
Fig. 1 simulates intercom Digital Realization device at the first example structure schematic diagram of transmitting terminal for the present invention;
Fig. 2 simulates intercom Digital Realization device at the second example structure schematic diagram of transmitting terminal for the present invention;
Fig. 3 simulates intercom Digital Realization device at the first example structure schematic diagram of receiving terminal for the present invention;
Fig. 4 simulates intercom Digital Realization device at the second example structure schematic diagram of receiving terminal for the present invention;
Fig. 5 is the schematic flow sheet that communicates embodiment illustrated in fig. 1;
Fig. 6 is the schematic flow sheet that carries out the DTMF transmission embodiment illustrated in fig. 2;
Fig. 7 is the schematic flow sheet that communicates embodiment illustrated in fig. 4.
Embodiment
In order to solve the functional mode that digital handset in the prior art can't compatible simulation intercom, can't guarantee and simulate the function interoperability between the intercom, hinder the simulation intercom to the technical problem that seamlessly transits between the digital handset, the invention provides a kind of simulation intercom Digital Realization device.
As shown in Figure 1, at transmitting terminal, the present invention simulates intercom Digital Realization device, comprising:
D/A conversion unit 15 is used for the digital signal after amplitude limiting processing is converted to analog signal.
As shown in Figure 2, when needs carried out DTMF (Dual Tone multifrequency, touch-tone signal are called for short DTMF) transmission, described device further comprised:
Among the embodiment shown in Figure 2, comprise further that analog-modulated unit 16 is used for the analog signal (analog baseband signal) that analog-modulated obtains through D/A conversion unit 15, and radiofrequency signal is outwards sent.
Described subsonics type comprises simulation CTCSS (Continuous Tone Controlled Squelch System, continuous speech control squelch system, be called for short CTCSS) or digital DCS (Continuous Digital Controlled Squelch System, continuous number control squelch system is called for short DCS).
The target speech bandwidth of described band pass filter 12 is 300～3400 hertz, then can prevent less than the interference to the infrasonic frequency signal of 300 hertz signal through bandpass filtering.
As shown in Figure 3, at receiving terminal, the present invention simulates intercom Digital Realization device, comprising:
Subsonics signaling detecting unit 32 is used for detecting according to the infrasonic frequency signal of default subsonics signaling mode to described digital signal, when having target infrasonic frequency signal in detecting digital signal, opens the loud speaker of simulation intercom;
Infrasonic frequency last or end syllable detecting unit 33 is used for starting last or end syllable when subsonics signaling detecting unit detects digital signal and has target infrasonic frequency signal and detects, and when detecting the last or end syllable of infrasonic frequency signal, closes the loud speaker of simulating intercom;
The processing unit 34 that postemphasises is used for when the loud speaker of simulation intercom is in open mode, to the digital signal that receives processings of postemphasising, reduction signal high fdrequency component;
D/A conversion unit 36 is used for digital voice signal is converted to analogue voice signal and output.
As shown in Figure 4, when needs detected DTMF, described device further comprised DTMF detecting unit 37 and signaling resolution unit 38, wherein,
Described DTMF detecting unit 37 is for detection of whether having DTMF in the digital signal through postemphasising after handling, if DTMF is transferred to signaling resolution unit 38; Otherwise, digital number is transferred to band pass filter 35;
Described signaling resolution unit 38 is used for parsing corresponding key information according to DTMF.
Described subsonics signaling rule is default CTCSS frequency or CDS sign indicating number.
Described speech bandwidth is 300～3400 hertz.
In technical solution of the present invention, because the analog signal of simulation intercom transmitting terminal input or the analog signal of simulation intercom receiving terminal reception have been carried out digitized processing, can in digital handset, compatibility simulate the functional mode of intercom, thereby guarantee the interoperability of function between digital handset and the simulation intercom.
Simultaneously, technical solution of the present invention has also further improved the detection performance of infrasonic frequency signal, dtmf signal; And, for the outer analog circuit of the present invention, be difficult to realize tone signal is carried out the counter-rotating of a stationary phase, also be not easy to detect the counter-rotating of tone signal phase place for receiving terminal, then be easy to realize at numeric field of the present invention.
A specific embodiment as shown in Figure 5, at transmitting terminal, the flow process of simulation intercom Digital Realization is specially:
Step 101: the analogue voice signal (being that voice signal is through the microphone electrical signal converted) of input is converted to digital voice signal;
Step 102: digital voice signal is carried out bandpass filtering;
Step 103: the signal that receives is carried out preemphasis handle, and, according to subsonics type (CTCSS or DCS) the generation infrasonic frequency signal of simulation intercom configuration;
Step 104: infrasonic frequency signal and the digital signal after preemphasis is handled are superposeed and the digital signal after the stack is carried out amplitude limiting processing, the purpose of amplitude limiting processing is to exceed the peak signal frequency requirement in order to prevent from modulating in step 106;
Step 105: the digital signal after amplitude limiting processing is converted to analog signal;
Step 106: analog-modulated (namely enter voltage controlled oscillator and carry out analog-modulated) outwards sends radiofrequency signal through the analog signal (analog baseband signal) that digital-to-analogue conversion obtains.
A specific embodiment as shown in Figure 6, at transmitting terminal, the flow process that DTMF is transmitted is specially:
Step 201: the key information according to the simulation intercom generates corresponding DTMF;
Step 202: DTMF is carried out preemphasis handle, and, according to subsonics type (CTCSS or DCS) the generation infrasonic frequency signal of simulation intercom configuration;
Step 203: infrasonic frequency signal and the DTMF after preemphasis is handled are superposeed and the digital signal after the stack is carried out amplitude limiting processing, the purpose of amplitude limiting processing is to exceed the peak signal frequency requirement in order to prevent from modulating in step 205;
Step 204: the digital signal after amplitude limiting processing is converted to analog signal;
Step 205: analog-modulated outwards sends radiofrequency signal through the analog signal that digital-to-analogue conversion obtains.
A specific embodiment as shown in Figure 7, at receiving terminal, the flow process of simulation intercom Digital Realization is specially:
Step 301: be digital signal with the analog signal conversion that receives;
Step 302: judge whether there is target infrasonic frequency signal in the described digital signal according to default subsonics signaling mode (CTCSS frequency or CDS sign indicating number), if, execution in step 303, otherwise, execution in step 309;
Step 303: open the loud speaker of simulation intercom, start last or end syllable simultaneously and detect;
Step 304: judge whether the infrasonic frequency signal is the last or end syllable of infrasonic frequency signal, if, execution in step 310, otherwise, execution in step 305;
Step 305: to the digital signal processing of postemphasising;
Step 306: judge in the digital signal of postemphasising after handling whether have DTMF, if, execution in step 311, otherwise, execution in step 307;
Step 307: digital signal is carried out bandpass filtering, filter out the signal outside the speech bandwidth;
Step 308: digital voice signal is converted to analogue voice signal and output;
Step 309: finish;
Step 310: mute speaker;
Step 311: parse corresponding key information according to DTMF.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (8)
1. a simulation intercom Digital Realization device is characterized in that, comprising:
AD conversion unit is converted to digital voice signal for the analogue voice signal that will simulate the input of intercom transmitting terminal;
Band pass filter is used for digital voice signal is carried out bandpass filtering, filters out the signal outside the speech bandwidth;
The preemphasis processing unit is used for that the signal that receives is carried out preemphasis and handles, and improves the signal high fdrequency component;
The subsonics generation unit is used for generating the infrasonic frequency signal according to the subsonics type of simulation intercom configuration;
Amplitude limiter is used for the infrasonic frequency signal and the digital signal after preemphasis is handled superposes and the digital signal after superposeing is carried out amplitude limiting processing;
D/A conversion unit is used for the digital signal after amplitude limiting processing is converted to analog signal.
2. device as claimed in claim 1 is characterized in that, described device further comprises:
The DTMF generation unit is used for generating corresponding DTMF according to the key information of simulation intercom;
Switch element, be used for the signal according to the type control transmission of transmission signal, when the transmission signal is digital voice signal, band pass filter and preemphasis processing unit are connected, make the digital voice signal behind bandpass filtering transfer to the preemphasis processing unit, when the transmission signal is DTMF, DTMF generation unit and preemphasis processing unit are connected, make DTMF transfer to the preemphasis processing unit.
3. device as claimed in claim 1 is characterized in that, described subsonics type comprises simulation CTCSS or digital DCS.
4. device as claimed in claim 1 is characterized in that, described speech bandwidth is 300～3400 hertz.
5. a simulation intercom Digital Realization device is characterized in that, comprising:
AD conversion unit is digital signal for the analog signal conversion that will simulate the reception of intercom receiving terminal;
Subsonics signaling detecting unit is used for detecting according to the infrasonic frequency signal of default subsonics signaling mode to described digital signal, when having target infrasonic frequency signal in detecting digital signal, opens the loud speaker of simulation intercom;
Infrasonic frequency last or end syllable detecting unit is used for starting last or end syllable when subsonics signaling detecting unit detects digital signal and has target infrasonic frequency signal and detects, and when detecting the last or end syllable of infrasonic frequency signal, closes the loud speaker of simulating intercom;
The processing unit that postemphasises is used for when the loud speaker of simulation intercom is in open mode, to the digital signal that receives processings of postemphasising, reduction signal high fdrequency component;
Band pass filter is used for filtering out the signal outside the speech bandwidth to carrying out bandpass filtering through the digital signal of postemphasising after handling;
D/A conversion unit is used for digital voice signal is converted to analogue voice signal and output.
6. device as claimed in claim 5 is characterized in that, described device further comprises DTMF detecting unit and signaling resolution unit, wherein,
Described DTMF detecting unit is for detection of whether having DTMF in the digital signal through postemphasising after handling, if DTMF is transferred to the signaling resolution unit; Otherwise, digital number is transferred to band pass filter;
Described signaling resolution unit is used for parsing corresponding key information according to DTMF.
7. device as claimed in claim 5 is characterized in that, described subsonics signaling rule is default CTCSS frequency or CDS sign indicating number.
8. device as claimed in claim 5 is characterized in that, described speech bandwidth is 300～3400 hertz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104503970A CN103188576A (en) | 2011-12-28 | 2011-12-28 | Analog interphone digitization achieving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104503970A CN103188576A (en) | 2011-12-28 | 2011-12-28 | Analog interphone digitization achieving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103188576A true CN103188576A (en) | 2013-07-03 |
Family
ID=48679468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104503970A Pending CN103188576A (en) | 2011-12-28 | 2011-12-28 | Analog interphone digitization achieving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103188576A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023279A (en) * | 2014-05-27 | 2014-09-03 | 大唐微电子技术有限公司 | Method of realizing receiving and sending of analog signals in digital interphone and device |
| CN106937182A (en) * | 2015-12-30 | 2017-07-07 | 北京世纪东方国铁科技股份有限公司 | The method that sub-audio signal is transmitted in talkback system and talkback system |
| CN108541081A (en) * | 2018-04-17 | 2018-09-14 | 福建北峰通信科技股份有限公司 | A kind of small cluster method of construction of intercommunication of analog- and digital- DMR compatibilities |
| CN113852388A (en) * | 2021-09-29 | 2021-12-28 | 玛丽安·卡林·亚历山德鲁 | System and method for removing tail tone of interphone emission |
| CN114257692A (en) * | 2020-09-25 | 2022-03-29 | 力同科技股份有限公司 | Communication equipment and method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101232471A (en) * | 2008-02-26 | 2008-07-30 | 上海士康射频技术有限公司 | Base band signal processing chip |
| US20090141117A1 (en) * | 2007-12-04 | 2009-06-04 | Elbex Video Ltd. | Method and Apparatus for Connecting and Operating Lockers for Home Deliveries via Video Interphones and Remotely Via a Virtual Doorman |
-
2011
- 2011-12-28 CN CN2011104503970A patent/CN103188576A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090141117A1 (en) * | 2007-12-04 | 2009-06-04 | Elbex Video Ltd. | Method and Apparatus for Connecting and Operating Lockers for Home Deliveries via Video Interphones and Remotely Via a Virtual Doorman |
| CN101232471A (en) * | 2008-02-26 | 2008-07-30 | 上海士康射频技术有限公司 | Base band signal processing chip |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023279A (en) * | 2014-05-27 | 2014-09-03 | 大唐微电子技术有限公司 | Method of realizing receiving and sending of analog signals in digital interphone and device |
| CN106937182A (en) * | 2015-12-30 | 2017-07-07 | 北京世纪东方国铁科技股份有限公司 | The method that sub-audio signal is transmitted in talkback system and talkback system |
| CN106937182B (en) * | 2015-12-30 | 2023-08-04 | 北京世纪东方智汇科技股份有限公司 | Interphone system and method for transmitting sub-audio signals in interphone system |
| CN108541081A (en) * | 2018-04-17 | 2018-09-14 | 福建北峰通信科技股份有限公司 | A kind of small cluster method of construction of intercommunication of analog- and digital- DMR compatibilities |
| CN108541081B (en) * | 2018-04-17 | 2021-09-28 | 福建北峰通信科技股份有限公司 | Analog and digital DMR compatible talkback small cluster building method |
| CN114257692A (en) * | 2020-09-25 | 2022-03-29 | 力同科技股份有限公司 | Communication equipment and method |
| CN113852388A (en) * | 2021-09-29 | 2021-12-28 | 玛丽安·卡林·亚历山德鲁 | System and method for removing tail tone of interphone emission |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103188576A (en) | Analog interphone digitization achieving device | |
| CN102572616A (en) | Digital interphone with digital and analogue hybrid receiving function | |
| CN104079310A (en) | Ultrashort wave data transmission receiving system based on software radio architecture and receiving method thereof | |
| CN103634254A (en) | Indirect modulation and demodulation data transmission device and transmission method thereof | |
| CN102821204A (en) | Portable multimedia communication device and application of portable multimedia communication device | |
| CN101729081A (en) | Dual-frequency-band receiving system and electronic device applying same | |
| CN102299684B (en) | Signal frequency conversion transmitter | |
| CN201123090Y (en) | Mobile phone monitoring system | |
| CN104579177A (en) | Digital down-conversion circuit suitable for filtering multi-tone modulation system | |
| CN102904658B (en) | Radio multi-party using control device and method | |
| CN201467477U (en) | Cluster optical fiber coverage system and near-end machine thereof | |
| CN107786688A (en) | Mobile terminal with intercom function | |
| CN202444603U (en) | 2.4G S/PDIF (Sony/Philips Digital Interface) wireless earphone device of set-top box | |
| CN201708793U (en) | Vehicular wireless frequency modulation interphone circuit | |
| CN105243036A (en) | Signal conversion apparatus and method | |
| CN201230315Y (en) | Radio equipment applied for railway same frequency multiuser communication | |
| CN202145651U (en) | Telephone set with WIFI routing function | |
| CN203251303U (en) | A portable radio signal monitoring control apparatus | |
| CN102064844B (en) | Wireless communication system | |
| EP2555481B1 (en) | Method and system for adaptively identifying signal bandwidth | |
| CN105656493A (en) | Signal receiving-transmitting system and communication equipment | |
| CN204013507U (en) | A kind of ultrashort wave number based on software radio framework passes receiving system | |
| US20100178865A1 (en) | Voice communication method, device, and system | |
| CN102752068A (en) | Communication system, transmitting apparatus, receiving apparatus and communication method | |
| CN204614445U (en) | A kind of subsonics identification compact system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20130703 |