CN1913405A - Digital broadcast system with priority management service for public contingent even and its method - Google Patents
Digital broadcast system with priority management service for public contingent even and its method Download PDFInfo
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- CN1913405A CN1913405A CNA2006101078390A CN200610107839A CN1913405A CN 1913405 A CN1913405 A CN 1913405A CN A2006101078390 A CNA2006101078390 A CN A2006101078390A CN 200610107839 A CN200610107839 A CN 200610107839A CN 1913405 A CN1913405 A CN 1913405A
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- H04Q1/30—Signalling arrangements; Manipulation of signalling currents
- H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
- H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
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Abstract
This invention provides a prefererential digital broadcast system used in the management and service for public burst events and a method including: a head and tail transmitting device receiving digital information with dual audio coding including a dual audio coding trigger control circuit outputting control current when receiving the head of said station signals,stopping outputting control current acted by the tail, generating control current when bursting head of a sudden public event signal and cutting normal broadcast signal to turn on normal broadcast signal automatically when turning on the tail of the ending of the sudden event signal, a digital HF modulator acted by the control current of dual audio code trigger control circuit, said signal is modulated to a digital high frequency compound signal and a receiving device with a digital HF signal demodulation circuit receiving digital HF compound signal from a sending device and demodulating said signal to generate a digital baseband signal capable of receiving public burst signals automatically when switching off.
Description
Technical field
The present invention relates to a kind of digit broadcasting system and method thereof that is used for the public contingent even priority management service.More particularly, relate to and a kind ofly carry out incorporate digit broadcasting system of public contingent even management service and method thereof by letter head and the letter tail that utilizes public contingent even and each radio signals.
Background technology
The high speed development of digital information technology makes the public broadcasting cause need be to total digitalization, multi-functional, intelligent transition.But now in the society owing to be subjected to the influence of the application model in traditional analog epoch, make the digital public broadcasting cause be in cost height, function is few, intelligent Application can not be supported more social government utility development situation.And the public contingent even management service system of implementing equally by audio broadcasting big, the intelligent degree of investment is low because the restriction that is subjected to factors such as traditional independent networking, manual operation is in, poor reliability, the situation that is difficult to maintenance management are difficult to extensive realization, more extensively networking is badly in need of a kind of new Digital broadcast system and is gone integrated comprehensive realization.
Summary of the invention
A kind of multi-functional, the intelligent digital broadcast system (wire and wireless is dual-purpose) that purpose of the present invention provides at the deficiency in above existing digital broadcast system and the public contingent even management service system just and it is in conjunction with the technical pattern that realizes the public contingent even management service.Letter head in the information of time period (sheet) of a data flow of the data message of transmitting terminal is added with double-tone (DTMF) channel address coding frequently.Described channel address coding can be worked out different double-tones geocoding frequently according to different a plurality of channels.Letter tail in the time period of data flow (sheet) is added with unified double-tone control code frequently.Double-tone trigger control circuit frequently is set; Described double-tone frequency control circuit is provided with two circuit in general radio station, when wherein one road circuit is used for normally broadcasting.When arriving, the data of the digital dual audio letter head that has this radio station channel address are divided into two paths of data.Wherein one the tunnel arrive double-tone and produce Control current at the double-tone in this radio station under geocoding letter head triggers frequently during circuits for triggering frequently and supply with subordinate's circuit.Under double-tone is believed the triggering of tail frequently, close downward level circuit when the data information transfer of this time period (sheet) finishes and supply with Control current, wait for that next time period (sheet) signal arrives.Another road circuit is specifically designed to the management service of public contingent even.When channel address coding letter head arrives frequently by the double-tone in the time period (sheet) of the data flow that is exclusively used in public contingent even, can cut off normal broadcasting signal, connect the public contingent even signal, produce Control current simultaneously and supply with the next stage circuit.A dedicated channel that is specifically designed to the public contingent even management service is set in the channel of a plurality of radio station, when the public contingent even task is arranged, just works, so that when receiver standby (artificial shutdown), can receive the management service of public contingent even.At a plurality of radio station channel (comprising that alarm is special-purpose) digital high frequency modulated circuit arrangement is set.Just when the prime trigger control circuit provides source current, work when described device has only the time period (sheet) that this road signal arrives, digital baseband signal (comprising double-audio signal and letter tail) is modulated to digital high frequency composite signal.The digital high frequency composite signal of multichannel radio station channel synthesizes the broadcast band that a way word high-frequency wideband composite signal is sent cable television system to through the high frequency synthesizer, constitutes zonal wired broadcast system.The also available coaxial cable for high frequency transmission in the zonule, the wired broadcast system of formation locality.Described high-frequency digital bandwidth composite signal also can constitute the digital radio broadcast system through digital broadband high-frequency emission (as digital transmission of television device, maximum can reach 56Mb/S).
More than constitute a computer, serve the broadcast management system of a plurality of radio station channel; Support to realize the management service function of public contingent even simultaneously by the application process that preferentially takies.Given full play to the high speed logic calculation function of computer, for digital broadcasting provides low-cost, intelligent, multi-functional broadcasting method.The manager of public contingent even can insert each radio station channel through telecommunication.
The application number that the present invention combines my invention is 200510105790.0 and 200510105789.8 part technology.
The high-frequency wideband digital composite signal of digital broadcasting (wired CATV system user port that connects, wireless receive) after high-frequency wideband receives with hf broadband antenna.Described high-frequency wideband composite signal is divided into two groups of high-frequency wideband digital composite signals through the high frequency distributor, wherein one the tunnel is used to receive the broadcast of normal radio station, the high-frequency change over switch of the doubly-linked integrated drive generator switch when the user starts shooting is connected wherein said normal radio station broadcast signal automatically in energized, select the input that the digital high frequency composite signal of one tunnel radio station channel wherein enters digital rectifier through the tuner (not shown), demodulate digital baseband signal through described high-frequency digital demodulator and send into digital decoding and amplifying circuit (not shown), finish digital broadcasting and receive task.Described digital decoding and amplifying circuit can be cell phone, notebook computer, MP3, MP4, the microcomputer sound equipment of automobile audio, numeral, digital radio receiver etc.When the management service of public contingent even being arranged, can receive service in real time as the radio station of normal reception.When the user shuts down when turn-offing digital decoding amplifying circuit power supply, its two-way tumbler switch is transformed into secondary that another road high frequency distributes automatically, and the described secondary high freguency bandpass filter that is connected to can only receive the frequency signal of the private station of public contingent even service.Its high-frequency digital decoder in shutdown enters dormancy low power consumption state automatically because no signal is imported.When the private station work of the public contingent even of transmitting terminal, described high-frequency digital demodulator is received signal through the high frequency receiving terminal, automatically terminate dormancy and enter operating state, the digital high frequency composite signal of public contingent even management service is demodulated into digital baseband signal, the geocoding trigger control circuit work frequently of the double-tone of the letter head of its described baseband signal, output control power supply makes subordinate's digital decoding amplifying circuit force work automatically, finishes the management service of user's automatic reception public contingent even.When described service finishes, believe frequently at double-tone under the triggering control of tail, cut off the supply of digital decoding amplifying circuit power supply automatically, make receiver recover off-mode.Described public burst management service specialized system can be applicable to fire alarm and the escape command scheduling local area network (LAN) system in the fire-fighting.
In order to realize purpose of the present invention, a kind of digit broadcasting system that is used for the public contingent even priority management service is provided, comprise: transmitting apparatus, reception is divided into the letter head and the letter tail of each station information of each time period (sheet) from what computer came by the time-division, described letter head is provided with double-tone frequency recognition coding separately, the letter tail is provided with unified double-tone and controls coding frequently, described transmitting apparatus has: the double audio coding trigger control circuit in a plurality of radio station, the double audio coding trigger control circuit that public contingent even is preferential.When the double-tone frequency geocoding in this radio station was arranged in the letter head of time period (sheet) information that computer comes, the output Control current stopped to export Control current under the effect of letter tail.When the letter that receives the public contingent even signal, produce Control current according to this letter head, cut off normal broadcast singal and connect this public contingent even signal, when receiving the letter tail of public contingent even signal, stop to export Control current and connect normal broadcasting signal automatically; With digital high-frequency modulator, under effect, this public contingent even signal is modulated to digital high frequency composite signal from the Control current of double audio coding trigger control circuit; And receiving equipment, it has: digital high-frequency signal demodulator circuit, receive the digital high frequency composite signal from transmitting apparatus, and the digital high frequency composite signal that will receive is carried out demodulation, generation digital baseband signal, and the digital baseband signal of output generation.
Described double audio coding trigger control circuit also can comprise: public contingent even management service special circuit, it is specifically designed to and receives and send the public contingent even signal.
Described transmitting apparatus also can comprise: digital high frequency synthesizer is used for the digital high frequency composite signal from digital high-frequency modulator is synthesized a way word high-frequency wideband composite signal.
Described receiving equipment also can comprise: digital high frequency receives distributor circuit, public contingent even signal when being used for that the digital high frequency composite signal from the equipment of transmission is assigned as normal broadcasting signal and shutdown or standby; With the Auto Power On trigger control circuit, be used for when receiving equipment shutdown or standby, public contingent even signal when receiving shutdown or standby, wake digital high-frequency signal demodulator circuit up, make digital high-frequency signal demodulator circuit in running order, the described public contingent even signal that receives is demodulated into letter head that has the public contingent even special use and the digital baseband signal of believing tail, when receiving described letter, the Auto Power On trigger control circuit is started working, and output control power supply makes subordinate's digital decoding circuit working, accept the public contingent even management service, when receiving described letter tail, cut off the electricity supply automatically, make receiving equipment recover off-mode.
Described receiving equipment also comprises: unit switch, be used for when receiving equipment shuts down, and the reception of digital high-frequency signal demodulator circuit is placed public contingent even signal when receiving shutdown or standby.
According to a further aspect in the invention, a kind of method that is used for the public contingent even management service is provided, described method comprises: when receiving from the letter of public contingent even signal, produce Control current according to described letter head, cut off normal broadcast singal, and connect this public contingent even signal, when receiving the letter tail of public contingent even signal, stop to export Control current and connect normal broadcasting signal automatically; Under the control of the Control current that produces, the public contingent even signal is modulated to digital high frequency composite signal; With modulated digital high frequency composite signal is synthesized one road high-frequency wideband composite signal, and be input to wired or wireless emission system.
According to a further aspect in the invention, provide a kind of method that is used for the public contingent even management service, described method comprises: when receiving equipment shutdown or standby, receive the public contingent even signal that sends; Triggering is carried out demodulation to the public contingent even signal that sends, thereby produces digital baseband signal; When the letter of the digital baseband signal that receives generation, produce and force starup current, make the receiving equipment start, thereby receive the public contingent even signal; With when the letter tail of the digital baseband signal that receives generation, trigger to cut off and force starup current, make receiving equipment recover off-mode.
The present invention has the following advantages:
1, it is simple, with low cost to transmit and receive circuit, and control is reliable.
2, can utilize the one-way transmission feature of CATV to set up subordinate's radio network, save a large amount of networking investments, possess good exploitativeness in the zone that needs arbitrarily.
3, the automation of its public contingent even management service, intellectuality can be widely used in natural calamity, group public order incident emergency commading system, be specially adapted in people's air defence, the war common people's emergency commading system, traffic emergency dispatch systems, be particularly useful for the fire disaster escaping alarm command system in the fire-fighting.
4, digital broadcasting of the present invention is except that transmitting the conventional audio signal, and the multimedia messagess such as video that also can transmit literal, picture, little amount of information are convenient to and the combination of multiple existing digital application instrument.
5, because of its selection is extensive, be and can extensively adopt component, be convenient to tissue in enormous quantities and produce.
6, when solving digitization of broadcasting, focus development goes out that novel large tracts of land rapidly promotes, and does not need the contingency management service system of the public of government's great amount of investment as an incident.Owing to the innovative technology of superior exploitativeness, can fill up the blank of this management service.
Description of drawings
By the description of carrying out below in conjunction with the accompanying drawing that an example exemplarily is shown, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 is the block diagram of digit broadcasting system of the present invention;
Fig. 2 is the signal flow graph of digit broadcasting system of the present invention;
Fig. 3 is the signal flow graph of public contingent even management service of the present invention;
Fig. 4 is the circuit diagram of the double audio coding trigger control circuit of transmitting apparatus of the present invention;
Fig. 5 is the circuit diagram of the public contingent even management service special circuit in the transmitting apparatus of the present invention;
Fig. 6 is the circuit diagram of the digital high-frequency modulator in the transmitting apparatus of the present invention;
Fig. 7 is the circuit diagram of the digital high frequency synthesizer in the transmitting apparatus of the present invention;
Fig. 8 is the circuit diagram that the digital high frequency in the receiving equipment of the present invention receives distributor circuit;
Fig. 9 is the circuit diagram of the digital high-frequency solution demodulation circuit in the receiving equipment of the present invention; And
Figure 10 is the circuit diagram of the double audio coding trigger control circuit in the receiving equipment of the present invention.
Embodiment
In conjunction with the accompanying drawings the present invention is described in detail below with reference to embodiment.
Fig. 1 is that multi-functional, intelligentized digit broadcasting system of the present invention (wire and wireless is dual-purpose) and its are in conjunction with the schematic block circuit diagram in the technical pattern of the public contingent even priority management service of implementing.Comprise: from the next digital broadcasting information V1--Vn of Computer Database (not shown), from the next information Vf--Vn of public contingent even, the information letter headband of the time period of its described information (sheet) has different double-tones geocoding frequently, represent the geocoding of each broadcast channel, wherein Vf represents public contingent even management service dedicated channel geocoding, its information letter tail has unified double audio coding, represents certain time period (sheet) message transmission of this channel to finish.D1-KDn and Kd double audio coding trigger control circuit are set, different separately geocodings is all arranged, represent different radio station channels, wherein D1-KDn is the signal triggering control circuit of the normal broadcasting in radio station.Kd is public trigger event management service special circuit.The Kd-Kn double audio coding is set in generic broadcasted radio station triggers controller and signal switching circuit, be used to guarantee that all radio station all automatically switch to the broadcast of public contingent even management service when implementing the public contingent even management service, realize preferentially taking principle, can recover normal broadcast automatically after finishing.All described double audio codings trigger control and all trigger at self special-purpose letter header encoder and just can move and export Control current.When triggering, unified letter tail double audio coding can stop to export Control current automatically.Kd-Kn also wants and can cut off normal broadcasting signal in the work of triggering, connects public contingent even management service signal; When finishing, described public contingent even management service connects normal radio station broadcasting signal automatically.T1, T2-Tn are a plurality of digital high-frequency modulators, energising work when the prime Control current arrives, and Control current quits work when finishing, and the digital baseband signal that each radio station channel is come is modulated to multi-path digital high frequency composite signal Vt1, Vtf--Vtn.Digital high frequency synthesizer H is set, multi-path digital high frequency composite signal Vt1, VTF--Vtn are synthesized a way word high-frequency wideband composite signal Vtxout, send into the broadcast band transmission of cable television system, constitute the wired broadcast system in big zone, also can self-built coaxial cable for high frequency transmission system, make up the personal wired broadcasting system of zonule, or described high-frequency wideband composite signal is delivered to the multi channel radio broadcasting system of WiMAX digital transmission platform emission radio broadcasting signal (56Mb/S speed being arranged approximately as a digital television transmitting station) formation.
At receiving terminal digital high frequency is set and receives distributor circuit Hs, to be assigned as V and Vts two-way from the cable broadcasting signal of cable TV (CATV) broadcast band or coaxial cable for high frequency transmission system and the radio broadcasting signal Vtx that receives from the high-frequency wideband wireless antenna, wherein one road V broadcasts as normal, is used to receive normal broadcast singal.Receive the special use of public contingent even management service with another road Vts as when shutdown (standby).Digital high-frequency signal demodulator circuit Ts is set, be used to receive digital high frequency composite signal and be demodulated into and have the digital baseband signal Vs that double-tone is believed head and information frequently, send into cell phone, MP3, MP4, PDA, automobile audio, digital sound, microcomputer sound equipment etc. and can handle in the terminating machine of digital information sound equipment and use.DFs double audio coding circuits for triggering circuit is set is used for when the user shuts down, the SK unit switch of described circuit places the special-purpose acceptance point of reception public contingent even management service, automatic reception public contingent even management service with the reception of circuit TS.This moment, Ts and Dfs all were in low power consumption dormancy holding state.It is in running order to wake Ts up when the public contingent even managing service information arrives, and output has the letter head of public contingent even special use and the digital baseband signal of letter tail double audio coding.Described letter header encoder triggers Dfs and starts working, and the output Control current makes subordinate's digital audio decoding amplifying circuit work, makes user's energy automatic reception public contingent even management service.Under the triggering of letter tail, turn-off the output Control current when service finishes, make receiver recover shutdown (standby) state.The person that makes the receiving equipment can both accept the management service of public contingent even under any state.
Fig. 2 is the signal flow graph of digit broadcasting system of the present invention.With reference to Fig. 2, the step of digital broadcast method of the present invention is as follows; At step S210, receive time division multiplexing multi-path digital baseband signal, the letter headband of the information of each time period (sheet) has double-tone frequency channel address coding separately, and the letter tail has unified double-tone and finishes coding frequently.At step S220, from the letter double-tone geocoding trigger control circuit generation frequently Control current of digital baseband signal, under the triggering of the double-tone frequency geocoding of believing tail, close Control current, wait for the signal arrival of next time period (sheet).At step S230, digital high-frequency modulator is started working under the Control current effect, and digital baseband signal is modulated to digital high frequency composite signal.At a time period (sheet) signal end of transmission closing control electric current, quit work, wait for the next signal cycle.At step S240, multi-path digital high frequency composite signal is synthesized one road high-frequency wideband composite signal send into wired or wireless transmission or emission system.At step S250, receive digital high-frequency wideband signal and generate two-way, the one tunnel is used for normal radio station receives, and another road receives when being used for standby.At step S260, select a way word high frequency composite signal and demodulation output digital baseband signal, supply with subordinate's digital decoding amplification and go back primary circuit.
Fig. 3 is the signal flow graph of public contingent even management service of the present invention.With reference to Fig. 3, at step S310, the letter headband of the information of each time period (sheet) of the digital baseband signal that comes from the public contingent even management service has special-purpose double-tone channel address coding frequently, has the unified double audio coding of broadcast singal at the letter tail.At step S320, from the letter header encoder trigger control circuit generation Control current of digital baseband signal, in general radio station, cut off generic broadcasted radio signals simultaneously, connect the public contingent even signal.Under letter tail coding triggers, stop to export Control current and connect normal broadcasting signal automatically.At step S330, under the effect of Control current, start digital high-frequency modulator work, public contingent even management service signal is modulated to digital high frequency composite signal, under the control circuit effect, recovers normal the broadcast when public contingent even management service finishes automatically.At step S340, multi-path digital high frequency composite signal is synthesized a way word high-frequency wideband composite signal, send into wire transmission or wireless broadcast emission system.At step S350, the user is listening to any radio station, all can accept the high-frequency digital composite signal of the management service of public contingent even, and signal is modulated to digital baseband signal, for the conventional digital decoding amplifying circuit of next stage.At step S360, the user is when artificial shutdown, and demodulator circuit enters holding state automatically, and is in the special-purpose public contingent even management service acceptance point of reception.At step S370, when public contingent even management service special signal arrives, demodulator circuit enters operating state automatically and described signal is demodulated into digital digital baseband signal, under the own coding of signal letter triggers, starup current is forced in trigger control circuit output, make next stage digital decoding circuit working, accept the public contingent even management service, under the effect of letter tail coding, recover artificial off-mode automatically when service finishes.
Fig. 4 is the circuit diagram of the double audio coding trigger control circuit of transmitting apparatus of the present invention.With reference to Fig. 4, the double audio coding trigger control circuit comprises: power supply V+, integrated circuit Ic are digital dual audio decoder ic CD4515.Brilliant lock diode D1, D2, D3, D4, D5, D6, D7, D8, resistance R 1, R2, R3, R4, crystal switch triode G, normally closed relay K.Establish logic decoding circuit in the integrated circuit CD4515, wherein 1 pin, 24 pin connect power supply; 2 pin, 3 pin receive the low frequency group d of one group of binary system double-audio signal; 21 pin, 22 pin receive the high frequency group g of one group of binary double-audio signal, and the binary system double-audio signal is translated into decimal system double-audio signal; Represent 0,1,2,3,4,5,6,7,8,9 decimal system double-audio signal respectively from 20 pin, 9 pin, 10 pin, 8 pin, 7 pin, 6 pin, 5 pin, 4 pin, 18 pin, the output of 17 pin; 12 pin ground connection; G is a switch triode, and resistance R 2 is the base biasing resistor of G, and R3 is the emitter resistance of G, and R1 one termination power V+ is the collector load resistor double as power protection resistance of G, and resistance R 2, R3 and switch triode G form power switch circuit; The triggering control utmost point of brilliant lock diode D1, D2, D3, D4, D5 connects No. 4 pin of double audio coding of CD4514, No. 7 pin, No. 5 pin, No. 6 pin, No. 9 pin respectively and forms metric 47569 double audio codings, its both positive and negative polarity serial connection, wherein the D1 positive pole connects normally-closed contact 2 pin of K through step-down protective resistance R4,1 pin meets power supply V+ through the contact, its D6 negative pole connecting resistance R2, composition double audio coding are 47569 start circuits for triggering; The triggering control utmost point of brilliant lock diode D6, D7, D8 connects the decimal system double audio coding of No. 0 pin of double audio coding of CD4514, No. 1 pin, No. 2 pin compositions 012 respectively, its both positive and negative polarity serial connection connects normally-closed contact 2 pin of K and the positive terminal of D1 respectively and forms the 012 triggering shutdown circuit of numbering.When the binary system double audio coding information that contains 47569 in the letter head of public broadcasting signal arrives in proper order, make 2 pin, 3 pin input, the g group of d group respectively from CD4514, from 21 pin, the input of 22 pin of CD4514, order is exported metric 47569 double-tones pulse signal frequently at 7 pin, 4 pin, 6 pin, 5 pin, 17 pin of CD4514; Order makes brilliant lock diode D1, D2, D3, D4, D5 conducting respectively, make power supply from No. 1 pin of K, No. 2 pin, through the base stage of resistance R 4, D1～D5, resistance R 2 to G, then G obtains base bias voltage and conducting, make collector electrode c and the emitter e of G have electric current to pass through, from emitter output Control current Vx.When the letter tail of information has 012 double-audio signal, order triggers brilliant lock diode D6, D7, D8 conducting respectively, under the shunting action of R4, there is bigger electric current to pass through, makes K work and disconnect normally-closed contact 1 pin, 2 pin, make all brilliant lock diode dead electricity and by conducting from the control line chart of K, make triode G lose base bias voltage and by conducting, stop to export Control current Vx, make whole circuit be in static holding state, wait for that arrive next information cycle.The trigger electrode of D1, D2, D3, D4, D5 connects the geocoding that the different double audio coding of CD4515 can be formed a plurality of channels respectively.This circuit maximum can be formed nearly 100,000 channel addresss coding.
Fig. 5 is the circuit diagram of the public contingent even management service special circuit in the transmitting apparatus of the present invention.As shown in the figure, public contingent even management service special circuit comprises: power supply V+, integrated circuit Ic are CD4514; Resistance R 1, R2, R3, R4, R5; Brilliant lock diode D1, D2, D3, D4, D5, D6, D7, D8; Switch triode G; Normally closed relay K1; Banked relay Kf, wherein 1 pin, 2 pin are normally closed electric shock, and 3 pin, 4 pin are normally opened contact, and 1 pin is connected and is input as Vin with radio signals, and 2 pin are output as Vout, and 3 pin connect the public contingent even signal and are input as Vfin, and 4 pin are output as Vfout.Integrated circuit CD4514 is a double-tone decoding circuit frequently, in establish the logical decode circuit, binary two groups of double-audio signals are translated into decimal system double-audio signal.1 pin, 24 pin connect power supply; 2 pin, 3 pin connect d group binary signal; 21 pin, 22 pin connect g group binary signal; 12 pin ground connection; 20 pin, 9 pin, 10 pin, 8 pin, 7 pin, 6 pin, 5 pin, 4 pin, 18 pin, 17 pin are exported respectively and are represented as 0,1,2,3,4,5,6,7,8,9 decimal system double-audio signal indication code; G is the crystal switch triode, and R2 is a base biasing resistor, and R3 is an emitter resistance, and R5 is its another termination power of collector load resistor V+, forms switching circuit jointly; Brilliant lock diode D1, D2, D3, D4, D5, D6 both positive and negative polarity serial connection, its D1 positive pole connects control coil one end of banked relay Kf, and its other end connects electric shock 2 pin of normally closed relay K1 through resistance R 4, and 1 pin meets power supply V+; The negative pole connecting resistance R2 of D6.The trigger electrode of brilliant lock diode D1, D2, D3, D4, D5, D6 connects 17 pin of IcCD4514,6 pin, 8 pin, 4 pin, 5 pin respectively, forms to be expressed as 95376 the double-tone signal triggering circuit of public contingent even management service dedicated channel geocoding (also can encode according to actual needs) frequently.The both positive and negative polarity serial connection of brilliant lock diode D6, D7, D8, the negative pole of its D8 connects the positive pole of D1, and the positive pole of D6 meets control coil one end of normally closed relay K1, another termination power V+.The trigger electrode of brilliant lock diode D6, D7, D8 connects 20 pin of IcCD4514,9 pin, 10 pin respectively, forms to be numbered 012 double audio coding trigger control circuit.When the digital baseband information of public contingent even management service arrives, binary system double-audio signal 95367 orders of its letter head insert 2 pin, 3 pin, 21 pin, 22 pin of IcCD4514, be translated into decimal coded through internal circuit, be expressed as No. 95367 pulse signal in 17 pin, 6 pin, 8 pin, 4 pin, the output of 5 pin respectively, trigger brilliant lock diode D1, D2, D3, D4, D5, D6 conducting respectively, make power supply V+ through the base stage that control coil and the resistance R 2 of 1 pin of K1,2 pin, resistance R 4, Kf arrives G, make the base stage of G obtain bias voltage and start working.Power supply V+ is through resistance R 5, and collector electrode c to emitter e output Control current Vx, has electric current to pass through and move simultaneously in the coil by Kf.Disconnect normally-closed contact 1 pin, 2 pin, interrupt normal broadcast singal V, connect normally opened contact 3 pin, 4 pin, public contingent even managing service information Vf is passed through, constituting all general radio station must force priority serve public contingent even management service application system.When the public contingent even management service finishes, under triggering, the double-audio signal of letter tail 012 coding makes brilliant lock diode D6, D7, the D8 conducting, power supply V+ is passed through through the control coil of normally closed relay, because the shunting of resistance R 4, make the electric current of K1 coil bigger, then the K1 action disconnects normally-closed contact 1 pin, 2 pin, at chien shih D1 at a flash, D2, D3, D4, D5, D6, D7, D8 because dead electricity and by, be in holding state, then Kf quits work, and connects normally-closed contact 1 pin, 2 pin make general radio station recover operate as normal, disconnect normally opened contact 3 pin simultaneously, 4 pin wait for that the public contingent even managing service information arrives next time.
Fig. 6 is the circuit diagram of the digital high-frequency modulator in the transmitting apparatus of the present invention.As shown in the figure, the numeral high-frequency modulator comprises power supply V+, integrated circuit Ic CMX017 resistance R 1, R2, R3, R4, R5, adjustable resistance Rw1, Rw2, variable capacitance diode Vd, capacitor C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, inductance L 1, L2, L3, L4, L5.Establish circuit such as voltage controlled oscillator, modulator, gain controlling, clock oscillation, economize on electricity standby, power amplifier in the Ic CMX017.1 pin is a first order power amplifier power supply; 2 pin are gain controlling; 3 pin, 4 pin, 5 pin, 7 pin, 8 pin, 10 pin, 11 pin, 14 pin, 15 pin, 17 pin, 19 pin, 21 pin, 27 pin are grounding leg; 6 pin are first power amplification, 9 pin are second power amplification output, 16 pin enable (sky of the present invention) for regulating, 13 pin are that power amplifier enables (sky of the present invention), 12 pin are second power amplifier power supply, and 26 pin are modulator output, and 28 pin are the power amplifier input, 18 pin are the modulator input, and 22 pin, 24 pin connect power supply.Wherein 2 pin meet Rw1 and capacitor C 1, C2 form gain control circuit.L5 is a power supply induction reactance coil; Inductance L 1, L2 and capacitor C 3 are formed an impedance circuit; C14 is a decoupling capacitance; C5, C6 are coupling capacitance; L6 is a decoupling coupling inductance, 23 pin connect electric capacity, C7 connects foreign frequency synthesizer or frequency phase lock circuit (the present invention is not shown) for vibration output, capacitor C 8, C9, C10, inductance L 4, variable capacitance diode Vd form oscillating circuit jointly and import from 20 pin, and resistance R 1, R4, R5, adjustable resistance Rw2 (can align oscillation intensity) form the oscillator power supply circuits; Capacitor C 11, C12, C13, C14 are decoupling capacitance.R2, R3 are signal input steady resistance.Be input to 18 pin from the N point through R2 resistance as digital baseband information (information of general radio station or public contingent even management service), through the modulation of the internal circuit of Ic CMX017 after driving stage, power amplification export from 26 pin, be coupled to 28 pin through capacitor C 5, C6, through first order power amplification, after the power amplification of the second level, L1 inductance at the 9th pin output impedance match circuit, C3 electric capacity Rfout prevention at radio-frequency port output high-frequency digital composite signal changes the radio frequency output that frequency of oscillation can form different frequency.
Fig. 7 is the circuit diagram of the digital high frequency synthesizer in the transmitting apparatus of the present invention.As shown in the figure, digital high frequency synthesizer comprises high frequency magnetic core H, primary coil L1, L2, Ln on the magnetic core H, secondary coil Lx.As multi-path digital high-frequency signal Vt1, Vtf, Vtn are input to L1, L2, Ln respectively, under the electromagnetic induction effect in secondary generation one road high-frequency digital broadband compound signal, and in Vtxout end output.
Fig. 8 is the circuit diagram that the digital high frequency in the receiving equipment of the present invention receives distributor circuit.As shown in the figure, digital high frequency receives distributor circuit and comprises high frequency magnetic core hs, the primary coil L1 on the magnetic core hs, secondary coil L2, L3, wherein L3 is connected to inductance L 4, L5, L6, and capacitor C 1, C2, C3 form band pass filter, can only receive public contingent even managing service information frequency.Receive the wireless high-frequency digital bandwidth composite signal of coming from wired high-frequency digital bandwidth composite signal of high frequency cable transmission or from hf broadband antenna, import from Vtxsin, under the frequency electromagnetic waves induction effect, at secondary generation two-way high-frequency digital broadband compound signal, respectively from Vsout and Vsfout output.
Fig. 9 is the circuit diagram of the digital high-frequency solution demodulation circuit in the receiving equipment of the present invention.As shown in the figure, numeral high-frequency solution demodulation circuit comprises power supply V+, integrated circuit Ic CMX018, resistance R 1, R2, R3, R4, R5, R6, adjustable resistance Rw, capacitor C1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, C15, C16, C17, C18, C19, C20, C21, C22, C23, C24, C25 (half is adjustable), C26, C27, C28, C29, C30, C31, C32, C33, C34, C35, capister Vd, inductance L 1, L2, L3, L4, L5, L6, L7, L8, L9, L10, L11, L12, switch S w1, Sw2, band pass filter, Bpf.1 pin of integrated circuit Ic CMX018 is the low noise amplifier input; 2 pin, 4 pin, 7 pin, 10 pin, 24 pin are ground connection, 3 pin are low noise amplifier output, 5 pin are first order mixing input, and 6 pin are first order mixing output, and 8 pin are second level mixing input, 9 pin are second level mixing output, 11 pin are that amplitude limit amplifies input, 12 pin, 13 pin are that amplitude limit amplifies decoupling, and 14 pin are that amplitude limit amplifies the intensity indication, 15 pin are 90 degree phase shift inputs, 16 pin are that amplitude limit amplifies output, and 17 pin are the demodulator power supply, and 18 pin are modulator output, 19 pin are Cauer oscillator emitter now, 20 pin are Cauer oscillator base stage, and 21 pin are oscillator output, and 22 pin are oscillation power, 23 pin are the oscillation circuit input, 25 pin are that low noise amplifies, and 26 pin connect capacitor C 20, are the amplifier decoupling, 27 pin are provided with for gain, and 28 pin are for enabling control.Establish circuit such as low noise amplification, VCO, amplitude limit amplification, the amplification of first intermediate frequency, the amplification of second intermediate frequency, demodulator in the CMX018.C13 is put coupling capacitance in first, connects 3 pin, 5 pin; 6 pin meet capacitor C 11, C12, C10, C9, C8, C7, C6, C5, C4, C3; Inductance L 1, L2, L12 form the peripheral circuit of putting in the one the second and import 8 pin through capacitor C 14, C15; Put in the 9 pin output second, amplify through inductance L 3, band pass filter Bpf2, inductance L 4 inputs 11 pin amplitude limits.C16 is a decoupling capacitance; C17, C18 are that amplitude limit amplifies decoupling capacitance.16 pin amplitude limits amplify imports 15 pin through C24 electric capacity; Can partly transfer capacitor C 25, capacitor C 26, C27, resistance R 6, inductance L 10 to form peripheral 90 degree phase-shift circuits; 19 pin, 20 pin meet inductance L 8, L9; Capacitor C 28, C29, C30, crystal oscillator Hd, resistance R 5 formed the Cauers peripheral circuit that vibrates now.Oscillator signal is exported through 21 pin, connects inductance L 7, meets power supply V+, connects test point through capacitor C 23.23 pin meet capacitor C 22, C31, C32, C33, C34, C35, variable capacitance diode Vd, and inductance L 11, L15, resistance R 4, adjustable resistance Rw forms the Cauer peripheral circuit that vibrates now; Capacitor C 33 is the vibration test point, regulates Rw may command oscillation intensity.C20 is the amplifier decoupling capacitance, resistance R 2, R3, and capacitor C 21, switch S w2 forms gain control circuit, and Sw2 is a high gain state when disconnecting.Resistance R 1, R7, capacitor C 19, switch S w1 compositional model control circuit connects 28 pin, during the Sw1 conducting, is in accepting state, is in low power consumption (10 μ A) sleep state during disconnection.When receiving the Vsout high-frequency digital signal that comes from general radio station through the tuning circuit (not shown), 1 pin input through IcCMX018, handle by internal circuit, after subordinate's digital decoding is enlarged into audio frequency, video, text-processing, show through 18 pin digital baseband signals.Can be mobile phone, MP3, MP4, PDA etc.When the user shut down, Sw1 was in off-state, received the Vf point (conversion under integrated drive generator switch S K effect during the open and close machine) that input point IN is connected to figure eight automatically.When public contingent even management service signal arrives, CMX018 work, Sw1 connects automatically, 18 pin output public contingent even managing service information.
Figure 10 is the circuit diagram of the double audio coding trigger control circuit in the receiving equipment of the present invention.As shown in the figure, double audio coding trigger control circuit 240 comprises power supply V+, and double-tone is decoder ic IcCD4514 frequently, brilliant lock diode D1, D2, D3, D4, D5, D6, D7, D8, resistance R 1, R2, R3, normally closed relay K1, doubly-linked normally opened relay K2, manual switchgroup Sk.Brilliant lock diode D1, D2, D3, D4, D5, both positive and negative polarity serial connection, the anodal connecting resistance R2 of D1; Normally closed relay normally-closed contact 1 pin, 2 pin connect power supply; The negative pole of D6 connects the control coil of doubly-linked normally opened relay K2, and through resistance R 3 ground connection, contact 1 pin of K2 meets power supply V+, and 2 pin connect power supply hand switch lower end, the two ends that 3 pin, 4 pin are pressed the Sw1 of figure nine; The trigger electrode of its D1～D6 connects 95376 double-tones of CD4514 respectively and numbers the expression pin frequently, and composition double-tone frequency number is 95376 double audio coding start control circuit; The both positive and negative polarity serial connection of brilliant lock diode, the positive pole of D6 is through control coil contact point 2 pin of K1, and the negative pole of D8 connects the positive pole of D1; The trigger electrode of D6～D8 connects 012 double-tone of CD4514 respectively and represents pin frequently, and the composition double audio coding is 012 shutdown circuit.When the binary message arrival frequently of 95376 double-tones in the letter head of public contingent even managing service information; order is input to 2 pin of IcCD4514; 3 pin; 22 pin; 23 pin; and be translated into metric double audio coding 95376; through 9 pin; 5 pin; 8 pin; the input of 4 pin; trigger D1～D6 conducting respectively; make power supply through the contact of normally closed relay 1 pin; 2 pin; D1～D5; the control coil of doubly-linked relay K 2; protective resistance R3 conducting; then K2 action; make contact 1 pin; 2 pin to subordinate's circuit supply, are forced start; make contact 3 pin; 4 pin make the IcCMX018 of figure nine remove standby.When the public contingent even management service finishes, under 012 signal triggering of information letter tail, make thyristor D6, D7, D8 conducting respectively, make the control coil energising work of normally closed relay K1.Owing to the shunting action of resistance R 2 is passed through more electric current, in point 1 pin, the disconnection of 2 pin of chien shih K1 at a flash, then D1～D8 is in by state because of dead electricity, and this moment, K1, K2 recovered former holding state, stopped the circuit supply to subordinate.
Although specifically shown and described the present invention with reference to its exemplary embodiment, but it should be appreciated by those skilled in the art, under situation about not breaking away from, can carry out various changes on form and the details to it by the spirit and scope of the present invention of claim definition.
Claims (10)
1, a kind of digit broadcasting system that is used for the public contingent even priority management service comprises:
Transmitting apparatus receives from what computer came and is divided into the letter head and the letter tail of each station information of each time period (sheet) by the time-division, and described letter head setting double-tone separately is recognition coding frequently, and the letter tail is provided with unified double-tone and controls coding frequently, and described transmitting apparatus has:
The double audio coding trigger control circuit in a plurality of radio station, have only when the letter in this radio station signal, the triggering control in this radio station just can be exported Control current, when the letter that receives the public contingent even signal, produce Control current according to this letter head, cut off normal broadcast singal and connect this public contingent even signal, when receiving the letter tail of public contingent even signal, stop to export Control current and connect normal broadcasting signal automatically; With
The numeral high-frequency modulator under the effect from the Control current of double audio coding trigger control circuit, is modulated to digital high frequency composite signal with this radio signals and public contingent even signal; With
Receiving equipment, it has:
Numeral high-frequency signal demodulator circuit receives the digital high frequency composite signal from transmitting apparatus, and the digital high frequency composite signal that will receive is carried out demodulation, generation digital baseband signal, and the digital baseband signal of output generation.
2, digit broadcasting system as claimed in claim 1, wherein, described double audio coding trigger control circuit also comprises: public contingent even management service special circuit, it is specifically designed to and receives and send the public contingent even signal.
3, digit broadcasting system as claimed in claim 1, wherein, described transmitting apparatus also comprises: digital high frequency synthesizer is used for the digital high frequency composite signal from digital high-frequency modulator is synthesized a way word high-frequency wideband composite signal.
4, digit broadcasting system as claimed in claim 1, wherein, described receiving equipment also comprises:
The numeral high frequency receives distributor circuit, public contingent even signal when being used for that the digital high frequency composite signal from the equipment of transmission is assigned as normal broadcasting signal and shutdown or standby; With
The Auto Power On trigger control circuit, be used for when receiving equipment shutdown or standby, public contingent even signal when receiving shutdown or standby, triggered digital high-frequency signal demodulator circuit, make digital high-frequency signal demodulator circuit in running order, the described public contingent even signal that receives is demodulated into letter head that has public contingent even and the digital baseband signal of believing tail, when receiving described letter, the Auto Power On trigger control circuit is started working, and output control power supply makes subordinate's digital decoding circuit working, accept the public contingent even management service, when receiving described letter tail, cut off the electricity supply automatically, make receiving equipment recover off-mode.
5, digit broadcasting system as claimed in claim 4, wherein, described receiving equipment also comprises: unit switch, be used for when receiving equipment shuts down, the reception of digital high-frequency signal demodulator circuit is placed public contingent even signal when receiving shutdown or standby.
6, a kind of method that is used for the public contingent even management service, described method comprises:
When receiving from the letter of public contingent even signal, produce Control current according to described letter head, cut off normal broadcast singal, and connect this public contingent even signal, when receiving the letter tail of public contingent even signal, stop to export Control current and connect normal broadcasting signal automatically;
Under the control of the Control current that produces, the public contingent even signal is modulated to digital high frequency composite signal; With
Modulated digital high frequency composite signal is synthesized one road high-frequency wideband composite signal, and be input to wired or wireless emission system.
7, a kind of method that is used for the public contingent even management service, described method comprises:
When receiving equipment shutdown or standby, receive the public contingent even signal that sends;
Triggering is carried out demodulation to the public contingent even signal that sends, thereby produces digital baseband signal;
When the letter of the digital baseband signal that receives generation, produce starup current, make the receiving equipment start, thereby receive the public contingent even signal; With
When the letter tail of the digital baseband signal that receives generation, trigger and cut off starup current, make receiving equipment recover off-mode.
8, a kind of digital broadcast transmission apparatus that is used for the public contingent even management service comprises:
The double audio coding trigger control circuit, when the letter that receives the public contingent even signal, produce Control current according to this letter head, cut off normal broadcast singal and connect this public contingent even signal, when receiving the letter tail of public contingent even signal, stop to export Control current and connect normal broadcasting signal automatically; With
The numeral high-frequency modulator under the effect from the Control current of double audio coding trigger control circuit, is modulated to digital high frequency composite signal with this public contingent even signal.
9, digital broadcast transmission apparatus as claimed in claim 8, wherein, described double audio coding trigger control circuit also comprises: public contingent even management service special circuit, it is specifically designed to and receives and send the public contingent even signal.
10, digital broadcast transmission apparatus as claimed in claim 8 also comprises: digital high frequency synthesizer is used for the digital high frequency composite signal from digital high-frequency modulator is synthesized a way word high-frequency wideband composite signal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101078390A CN1913405A (en) | 2006-07-26 | 2006-07-26 | Digital broadcast system with priority management service for public contingent even and its method |
| PCT/CN2007/002252 WO2008014687A1 (en) | 2006-07-26 | 2007-07-24 | A digital broadcasting system and method for public emergency management service being taken precedence |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006101078390A CN1913405A (en) | 2006-07-26 | 2006-07-26 | Digital broadcast system with priority management service for public contingent even and its method |
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| CN1913405A true CN1913405A (en) | 2007-02-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006101078390A Pending CN1913405A (en) | 2006-07-26 | 2006-07-26 | Digital broadcast system with priority management service for public contingent even and its method |
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| CN (1) | CN1913405A (en) |
| WO (1) | WO2008014687A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014687A1 (en) * | 2006-07-26 | 2008-02-07 | Yibing Wang | A digital broadcasting system and method for public emergency management service being taken precedence |
| CN102256025A (en) * | 2011-03-26 | 2011-11-23 | 太原鹏跃电子科技有限公司 | Dual-tone-multi-frequency-signal-based remote emergency broadcast system control method and device |
| CN103618581A (en) * | 2012-09-11 | 2014-03-05 | 国家广播电影电视总局广播科学研究院 | Method for waking up emergency broadcast remote terminal, remote wakeup terminal and remote wakeup system |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104683052B (en) * | 2015-03-23 | 2018-09-18 | 成都新光微波工程有限责任公司 | A kind of emergent source of sound Broadcast Control device of intelligent broadcast |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP1104128A4 (en) * | 1999-05-28 | 2005-12-28 | Matsushita Electric Ind Co Ltd | Broadcasting system |
| JP2005051602A (en) * | 2003-07-30 | 2005-02-24 | Sony Corp | Digital broadcasting receiver, and information processing method and program |
| US20050037728A1 (en) * | 2003-08-13 | 2005-02-17 | Binzel Charles P. | Emergency broadcast message in a wireless communication device |
| KR100507707B1 (en) * | 2003-08-26 | 2005-08-09 | 니트젠테크놀러지스 주식회사 | A scheduling method of advertisement/broadcasting based on network, a centrally controlled management system using screen partition and a method thereof |
| CN100514903C (en) * | 2005-09-29 | 2009-07-15 | 王亦兵 | System and up, down link transmission method of frequency distribution user inserted in local network |
| CN1913405A (en) * | 2006-07-26 | 2007-02-14 | 华瑞龙腾（北京）信息技术有限公司 | Digital broadcast system with priority management service for public contingent even and its method |
-
2006
- 2006-07-26 CN CNA2006101078390A patent/CN1913405A/en active Pending
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- 2007-07-24 WO PCT/CN2007/002252 patent/WO2008014687A1/en active Application Filing
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008014687A1 (en) * | 2006-07-26 | 2008-02-07 | Yibing Wang | A digital broadcasting system and method for public emergency management service being taken precedence |
| CN102256025A (en) * | 2011-03-26 | 2011-11-23 | 太原鹏跃电子科技有限公司 | Dual-tone-multi-frequency-signal-based remote emergency broadcast system control method and device |
| CN103618581A (en) * | 2012-09-11 | 2014-03-05 | 国家广播电影电视总局广播科学研究院 | Method for waking up emergency broadcast remote terminal, remote wakeup terminal and remote wakeup system |
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| WO2008014687A1 (en) | 2008-02-07 |
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