WO2007036153A1

WO2007036153A1 - Dtmf controlling device and dtmf controlling high-frequency modulator

Info

Publication number: WO2007036153A1
Application number: PCT/CN2006/002550
Authority: WO
Inventors: Yibing Wang
Original assignee: Sinorevon Beijing Infotech Cor; Yibing Wang
Priority date: 2005-09-29
Filing date: 2006-09-28
Publication date: 2007-04-05
Also published as: CN1816163A

Abstract

A DTMF controlling device and DTMF controlling high-frequency modulator. The DTMF controller includes: DTMF encoder circuit for receiving analog baseband signal encoded with DTMF address ,and decoding the analog baseband signal based on the DTMF address code to output two groups of binary DTMF encoding signal; DTMF decoder circuit for receiving the two groups of DTMF encoding signal and decoding them into decimal DTMF encoding signal; DTMF code switch circuit for receiving the decimal DTMF signal and outputting power control circuit. The DTMF controller and DTMF controlling digital high-frequency modulator of the invention are suitable to the applications in the backbone network of broadcast communication and telecommnication , and support multiple communication protocols, and are especially suitable to the digital information applications in broadcast communication telecommunication electric government affair and electric commerce,and futher more,they can be used in combination with DTMF switch to establish connections of high speed and large capability outside the switch device .

Description

Description Dual audio control device and dual audio control digital high frequency modulator

The present invention relates to dual audio signal control, and more particularly to a dual audio control device and a dual tone control digital high frequency modulator. Background technique

Existing users of the backbone network, such as radio and television, telecommunications, Internet, and public information service networks, use the traditional technology structure of independent network construction, and independently set their own communication service application systems on the user side. The service mode adopted is from Early applied to the scientific computing and military applications of a few people. The following defects exist: the user operation is complicated, the technical difficulty is high, the communication resource utilization transparency is very low, the communication quality in the busy period is too different, and the function and task division of the trunk communication network are not clear. At present, various data communication systems cannot fully utilize the intelligent (high-speed logic operation), transmission (high-speed and large-capacity communication), and storage (high-speed and large-capacity dense information access) of digital information technology, and cause various advantages. Communication service system, service standards are confusing, investment is repeated, operating efficiency is low, and cost is high. The existing user access LAN uses a large number of integrated wiring, which causes great environmental pressure, and is difficult to popularize and popularize the application. It is not easy to realize the era change. These have caused the wired communication to be replaced by mobile communication to replace the unfavorable situation of the main basic communication status of the society that it once had in history. It is far from being able to adapt to the current high concentration of social user groups, the rapid growth of information service traffic, and the many functional requirements. The need of the society to face development such as the transformation of the times has seriously restricted the development of the digital society. At the same time, due to the low rate of address exchange, it is difficult to use valuable communication resources of higher frequency and wider spectrum. SUMMARY OF THE INVENTION A digital information integrated application service for data cable communication frequency allocation user access LAN network construction and service application communication system and dual audio control device and dual audio control digital high frequency modulator. Adopting a new high-performing effect that provides a dedicated communication channel for each user without being affected by busyness Ming's communication resource allocation technology and high-speed and high-capacity high-bandwidth and high-capacity high-speed, high-capacity, passive-running, non-relay-amplified, passive-operated users accessing the LAN's physical line structure in the main line, enabling seamless communication resource utilization, establishing An easy-to-learn and easy-to-use application and communication service technology for popular operating habits. It can better utilize the advantages of intelligent (high-speed logic operation), transmission (high-speed and large-capacity communication), and storage (high-speed and large-capacity dense information access) of digital information technology. The function and task of connecting the trunk network and the user to the local area network are separated to realize an efficient data communication operation mode, and at the same time, it is compatible with the existing TCP/IP technical architecture and analog communication system. The invention is applicable to the social status of the user with high concentration and large amount of information communication, and effectively supports the popularization and application of the popular society, which is conducive to the rapid development of the digital society construction.

In order to achieve the object of the present invention, a dual audio control apparatus is provided, comprising: a dual audio decoding circuit for receiving an analog baseband signal from a dual audio address encoding, and encoding the analog baseband according to the dual audio address encoding Decoding the signal and outputting two sets of binary dual audio coded signals; a dual audio decoding circuit for receiving the two sets of binary dual audio coded signals and decoding them into a decimal two-tone coded signal; and a dual audio coded switch circuit Receiving the decimal diphone encoded signal, outputting a power control current.

According to another aspect of the present invention, a dual audio control digital high frequency modulator is provided, comprising: an analog to digital conversion circuit for receiving a digital baseband signal with a dual audio address encoding and converting it into an analog baseband signal; a dual audio decoding circuit, configured to receive an analog baseband signal from the analog to digital conversion circuit, decode the analog baseband signal according to a dual audio address encoding header, and output two sets of binary dual audio encoded signals; a code circuit, configured to receive the two sets of binary dual audio coded signals and decode them into a decimal dual audio coded signal; and a dual audio code switch circuit, configured to receive the decimal dual audio coded signal, when the decimal dual audio And outputting a power control current when the signal is included in the encoded signal, when the signal is included in the decimal dicoded signal, the power control current is not output; and the digital high frequency modulation portion is configured to receive the source The corresponding one-way downlink multiplex number of the switch with multiple user address codes a word baseband signal, when receiving the power control current, modulating the one downlink multiplexed digital baseband signal, and outputting a downlink high frequency composite signal of a natural frequency; and a frequency converting portion for using the digital high frequency modulation The downlink high frequency composite signal of the natural frequency is partially received and converted into a downlink high frequency composite signal having a frequency corresponding to the user address code.

The invention has the following advantages:

1. The existing telecommunication interactions use dual audio address commands, and there is low interaction rate and information. Insufficient capacity. The present invention can establish a high-speed, large-capacity physical link outside the switching device in combination with the dual audio address exchange in the exchange.

2. The present invention can use higher frequency, wider spectrum communication resources, reduce costs, and is easy to construct and maintain.

3. The invention can make the program information of the broadcast computer with the double audio address encoding header and the signal tail, realize high-speed distribution, automatic start-up acceptance and automatic shutdown of the client.

4. The invention can conveniently implement multi-function remote intelligent control by controlling the power supply current.

5. Since the dual audio coded signal is reliable, low in cost, long in application history, and conforms to the application habits of the public, the present invention can be implemented on a fixed telephone and a hand-held telephone, and is easy to apply. DRAWINGS

1 is a block diagram showing the principle of frequency allocation user accessing a local area network circuit of a digital information integrated communication service application according to the present invention;

2A is a circuit schematic diagram of a high frequency digital modulator according to an embodiment of the present invention; and FIG. 2B is a circuit schematic diagram of a high frequency digital demodulator according to an embodiment of the present invention. detailed description

The present invention will be described in detail below with reference to the accompanying drawings.

1 is a circuit block diagram of a frequency allocation user accessing a local area network of a digital information integrated communication service application according to an embodiment of the present invention. As shown in FIG. 1, the wired communication frequency distribution user access local area network of the digital information comprehensive application service of the present invention comprises: an information processing device (not shown), which can employ a network server; a network switch (not shown); High-frequency digital modem Tl, Τ2, Τ3, Τη of the communication front end; downlink network line medium Txl, Τχ2, Τχ3, Τχη; uplink network line medium Tsl, Ts2, Ts 3, Tsn; downlink main line line Yx; uplink trunk line medium Ys;, downlink branch line medium Yxl, Υχ2, Υχ3, Υχη; uplink branch line medium Ysl, Ys2, Ys3, Ysn; high frequency broadband synthesizer H; high frequency wideband distributor HF; downlink amplifier Dx, which uses cable television Equipment and technical standards; Uplink amplifier Dy, which uses cable TV equipment and technical standards; Multiple downlink trunk branches Fxl, Fx2, Fx3, Fxn; Multiple downlink branch splitters Fx; Multiple uplink trunk mixers Fsl, Fs2 , Fs 3, Fsn; multiple uplink branch mixers Fs; user-side digital high-frequency demodulator Tjl, Tj2, Tj 3, Tjn; Digital high-frequency modulators Tdl, Td2, Td3, Tdn, different types of digital high-frequency modems use different bandwidths, can provide different communication rate services; line termination impedance matching R, usually 75 Ω grounding resistance.

In the figure, Wl, W2, W3, Wn are digital uplink and downlink bidirectional baseband signals, Uxl, Ux2, Ux3, Uxn are user-side downlink digital baseband signals, and Usl, Us2, Us3, Usn are user-side uplink digital baseband signals. According to an embodiment of the present invention, in order to improve information capacity, the network line media Txl-Txn, Tsl-Tsn, Yx, Ys, Yxl-Υχn, Ysl-Ysn can use high-frequency coaxial cables, such as domestic SYKV-75-, SYWV. - 75-, US TFC-T10-500, Tri lgymc ^A 2 0. 44-1. 0, Finland NOKIA-Sm3 series products)

As shown in Figure 1, the front-end server is set up on the user access network, and the network switch and the trunk network such as radio and television, telecommunications, Internet, and public information services are connected through the LAN trunk port. The user port of the server LAN is connected to the network switch, and the network switch. The user port is connected by a twisted pair and a high frequency digital modem T1 - Tn to transmit a digital baseband signal W1 - 3⁄4. The user port of the network switch is set to the default fixed user identification status (except PC users). The external storage of the front-end server is as follows: 1. The operation area is mainly the operating system and operating application software services. 2. The public information storage area mainly stores information services for users in the area. 3. Management area, mainly for regional management information services. 4. The user-only area is the largest application area for external storage. The storage area is set for each user-specific file area of each different capacity according to the user quantity and the user application level. Each user sets a different eight-digit dual-audio code name as The dedicated communication address code of each user is authorized by the server for the user application.

After the server processes the downlink information with the 8-bit DTMF dual audio coded address header, the LAN port is connected to the network switch trunk port, and the user port of the network switch forms the downlink signal in the digital uplink and downlink bidirectional baseband signal WfWn, which is twisted pair. Connected to the downstream input port of the high-frequency digital modem ΤΓΤη, the high-frequency digital modems Tl-Tn respectively operate at the specified proprietary center frequency and frequency bandwidth, and their operation is controlled by the unique 8-bit dual-tone coding in the dedicated area. The trigger circuit can be powered when the signal with the dual audio coded header in the corresponding digital information arrives. After the information transmission is completed, the dual audio trigger signal of the tail is triggered to be powered off, and the work is stopped to ensure that each application is authorized. The user exclusively enjoys one or more downlink channels of dedicated frequencies. The downlink baseband digital signal is modulated by the high frequency digital modem Tl-Tn into high frequency composite signals of different frequencies, and is connected to the input port of the high frequency broadband synthesizer H through the network line Txl-Txn to form a high frequency broadband composite signal. The output port is connected to the input port of the line amplifier Dx by a high frequency coaxial cable, and the high frequency broadband composite signal of the rated field strength is amplified and output, and the downlink trunk is connected via the output port. Yx, access brancher Fxl-Fxn in trunk Yx, which is divided into designated sub-band 支n of dedicated frequency band, where near-line amplifier Dx operates in high frequency band, and the center frequency of user demodulator supported by its branch line is high In the frequency band, the distribution is authorized, and the farthest branch line runs in the middle and low frequency bands, and the downlink high frequency broadband composite signal is connected to the input port of the user high frequency digital demodulator Tjl_Tjn by the high frequency coaxial cable via the branch Fx. The function configuration and working center frequency of each user of the high-frequency digital demodulator TjfTjn should be set opposite to the high-frequency digital modem T1-Tn, and the frequency specified by the user is selected by the high-frequency digital demodulator Tjl-Tjn. The high frequency composite signal is demodulated to output respective digital baseband signals Uxl_Uxn from the output, thereby forming a downlink communication from the server to each user.

The uplink digital baseband signals Us1-Usn of each user with the 8-bit dual-tone encoding header dedicated to each user are respectively connected to the input ports of the user's digital high-frequency modulator Tdl_Tdn, and modulated to different frequencies of each channel. The high-frequency composite signal is mixed by the mixer Fs to the uplink branch line Ysl-Ysn, and is mixed by the mixer Fsl-Fsn to form an uplink high-frequency broadband composite signal, which is connected to the input port of the line amplifier Dy via the uplink trunk Ys, and the uplink trunk Ys The frequency band setting of the uplink branch line Ysl_Ysn is the same as that of the downlink trunk line, and the transmission direction is opposite. The running center frequency and function configuration of the digital high-frequency modulator Tdl-Tdn and the demodulation frequency of the high-frequency digital modem Tl-Tn are equivalently set, and are amplified by the line amplifier Dy to the rated signal field strength through the output port with high frequency coaxial The cable is connected to the input port of the high frequency wideband distributor HF, and the multi-channel high frequency composite signal outputted by the high frequency wideband distributor HF output port is connected to the upstream digital demodulator input port of the high frequency digital modem ΤΓΤη via the network line Ts1-Tsn. The frequency-selective demodulation of the digital baseband signal of the 8-bit dual-tone encoded signal header in the digital uplink and downlink bidirectional baseband signal WfWn. The user ports of the network switch connected to the network switch through the twisted pair cable are connected to the server LAN port through the network switch trunk port to process the information, thereby forming the uplink data communication transmission of the user accessing the LAN.

The server connects to the trunk network of broadcasting, telecommunications, internet, public information service network, etc. through the trunk network interface, so that all users in the local area network share a set of telecommunication trunk network relay communication services, share an Internet domain name service, and share the server. Intelligent (high-speed logic operation) services such as routing, switching, and digital information processing. Download all kinds of shared information required by users in this network from the above-mentioned various types of databases (subsequent applications), websites, and high-speed large-capacity (packages) to the public information area for users in the network to select, and make special reservations for users on the network. Or the instant information is downloaded to the user's dedicated exclusive storage file area through the high-level database of the upper layer for the user to select immediately or at any time. The server selects the trunk network link required for the communication outside the network according to the request of the user for external communication. And according to the information type processing, it is suitable for the intensive transmission of files for high-speed transmission of various trunk lines, or the same information is downloaded by multiple users (one file plus multiple address headers), so that the server undertakes to access the trunk network and users. The task of separating the LAN functions enables the trunk network to take the advantage of high-speed intensive communication remote transmission, and minimizes the backbone network to be restricted by the user network, thereby improving operational efficiency. When the end user sends a request command with its own 8-bit DTMF dual audio code, the server sends a service application interface or a classified information menu with 10 input indicators to the user, and the user can click or issue a decimal code. Indicates to request service from the server. The server sends the information sent by the user to the inside and outside of the network with the 8-bit DTMF dual-audio address encoding header of the other party, so as to facilitate routing and switching in various trunks and the called party's user access to the local area network (including the existing analog network). ) Front-end switch or server identification. All types of information that need to be transmitted downstream to the user are added with a header encoded by the user's 8-bit dual audio address to support each user to receive the required downlink digital baseband signal Uxl-Uxn, and the uplink of various functional categories. Or the downlink information is used to facilitate the function classification and processing of the front-end server and the terminal, and the service classification identifier is added in the header code, such as the radio and television

A XX: Film and TV is A01, music language (single listening) is A02, Telecom is BXX: language traffic is B01, video traffic is B02, e-government is AB XX ..., public emergency alert command For C110, the fire alarm is C119, the disaster weather alarm is C121, and the traffic road emergency is C120. Corresponding control circuit is set in the audio circuit of the user terminal, and all the above information can be automatically turned on when the host is turned off, automatically switched to the emergency application state when being used, and automatically maintains the appropriate volume to ensure the effect of the emergency alarm. After the alarm is completed, it can be automatically shut down or switched to the normal application state. DXX is a dedicated code for the tail-off shutdown trigger. For example, D01 is T1—Tn is off, DC is the terminal machine, D9XX is the terminal household appliance shutdown, etc. The remote home appliance control port is set in the terminal, so that the user can control the home by phone or mobile phone. The electrical appliance is running. When the user calls the terminal in the home, press B91 for air conditioning, B92 for microwave oven, B93 for rice cooker, B94 for lighting, and B95 for safety protection. PC users in this network implement the TC/IP communication protocol, and enjoy the various types of support from the server.

2A and 2B are schematic diagrams of the digital high frequency modulator and demodulator circuit of the present invention. 2A is a schematic diagram of a digital high-frequency modulator circuit, wherein IC1 is a DTMF dual-audio decoding dedicated integrated circuit, and YN9101 is adopted in this embodiment, which has logic processing, sine wave generation, clock oscillation circuit, and 9-pin. 10 feet are connected to the crystal oscillator, HL to ensure clock synchronization. IC ² is a DTMF dual audio decoding dedicated integrated circuit. In this embodiment, CD4028 is used, and a logic processing circuit is provided therein to translate the binary DTMF signal into a decimal code. Dl, D2, D3, D4, D5, D6, D7, D8, D9, D10 is a unidirectional thyristor, D1—D8 form a power-on address coding combination circuit, and D9 and D10 form a shutdown code switch circuit. G1 is a crystal triode, resistors Rl and R2 form the base bias circuit of G1, R3 is the emitter resistance of G1, and R4 is the collector load resistor and current limiting protection resistor of G1. K is a normally closed relay switch. The control poles of D1~D8 are respectively connected to the decimal digits 6, 5, 3, 7, 8, 2, 4, and 9 of the audio and audio decoding ASIC IC2 to form the 65378249 address code. D10 and D9 are connected to the D pin and the Q pin respectively, and the K constitutes a shutdown circuit, and the dual audio decoding dedicated integrated circuit IC1, the dual audio decoding dedicated integrated circuit IC2, Gl and peripheral components together constitute a special code trigger switch circuit, When the digital signal W1—3⁄4 from the switch has the encoded 65378249DTMF signal, it is converted into a dual audio signal by an analog-to-digital conversion circuit (PCM), and is input to the 7-pin input of the dual-audio decoding dedicated integrated circuit IC1, at 1 pin, 2 The two-digit binary audio signal output from the foot, 13-pin, and 14-pin is connected to the corresponding 12-pin, 11-pin, 10-pin, and 13-pin of IC2, and is decoded by the dual-audio decoding ASIC IC2 to output a decimal 0. 1, 1, 3, 4, 5, 6, 7, 8, 9 and #, *, A, B, C, D foot number, if the output is 65378249, respectively trigger D1 - D8 turn-on. After R1 and R2, Gl obtains the base bias voltage, so that G1 is turned on to supply power from the emitter to the subsequent stage circuit (Dl-D8 is always on after continuous conduction, and the operation is very reliable), when information At the end of the transmission, the D and 0 signals at the end of the signal will trigger D9 and D10 to turn on. At this time, there is current flowing through the working coil of K, K is activated, and contacts 1 and 2 are disconnected. Then all of Dl-D10 The thyristor is in a non-conducting state due to power failure, and G1 loses the base bias voltage and is in a non-conducting state. The emitter has no power to output to the subsequent stage circuit. At this time, K loses power, then the 1 pin 2 pin is reclosed, so that the trigger circuit is in the standby state.

IC3 is a digital high-frequency modulation integrated circuit. In this embodiment, a Tx6000 is used, and a circuit such as a SAW resonator, a SAW filter, an RF amplifier, a modulation and a bias control is provided inside. 17 feet are state control. When this pin signal is high level, it works in transmitting, low is sleep standby, L1 is series matching coil, L2 is protection line 圏, C11 coupling capacitor, L3 coil and C12 form frequency selective resonant circuit , changing the capacitance and inductance can change the receiving frequency. G2 is a high frequency triode, resistors R5, 6 are the base bias resistors of G1, R7 is the emitter resistance of G1, inductors L7, L5, L6, capacitors Cl, C2, C3, C4 and high frequency cores Hl, H2 And Gl together with the frequency conversion amplifier circuit, G3 is the high frequency amplifier transistor, the resistor R8 is the base bias resistor, R9 is the emitter resistor, R10 is the collector load resistor, and the capacitors C6, C7, C8 and L9 are the filter circuit. C8 and coupling capacitors, resistors R11, R12, R13 form an impedance matching circuit, and RF is a high frequency output port. C14 and C5 are bypass capacitors. C9, C10, C13 are filter capacitors, R15 is the filter resistor, and R14 is the damping resistor. The user-addressed downlink digital signal in W1-Wn enables the dedicated digital frequency modulation high-frequency circuit dedicated to the user to be energized, and the signal enters the 7-pin of IC3 via R14, and becomes a high-frequency composite signal after being processed by the internal circuit. After 20-pin output, it is tuned and frequency-selected by Ll, Cl l, C12, L3, coupled to the base of G2 via L4, and the frequency conversion circuit composed of G2 and peripheral components becomes the authorized frequency of the user and is coupled via L7 and L8. Go to the base of G3, after amplification by G3, connect RF to Txl-Txn via C6, C7, R1 R12.

2 is a circuit schematic diagram of the digital high frequency demodulator of the present invention, wherein G1 is a high frequency variable frequency crystal triode, Hl, Η2 are high frequency magnetic cores, Gl, Hl, H2 and inductors L3, L4, L5 and capacitor C3 C4, C5, and C6 form a variable frequency amplifier circuit. The resistors R1 and R2 are the base bias resistors of G1, R3 is the emitter resistor, G2 is the high frequency amplifier transistor, and R4 is the base bias resistor. R5 is Collector load resistance, R6 is the emitter resistance, capacitor C7 is the emitter bypass capacitor, IC1 is the digital high-frequency demodulation integrated circuit, Rx6000 is used in this embodiment, SAW filter, SAW delay line, RF amplifier, Data limiter, detector, low-pass filter and other circuits, 17-pin, 18-pin parallel connection followed by R/S state control, when the control is in the high state, it is in the receiving state, and in the low state, it is in the low-power sleep standby state. R11, R12, and R13 are level-limiting resistors, R14 is a bandwidth-controlled resistor, R10 and R15 are RF amplification bias resistors, C12 and C13 are bypass capacitors, and C14 is a 5-pin and 6-pin coupling capacitor, C10 and C11. Decoupling Capacitors, resistors, R7, R8, R9 composition impedance matching circuit, a capacitor C8, C9, C15 and inductor L9 composed filter circuit, and the capacitive coupling capacitor C8. The circuit shown in Figure 4B is a front-end digital high-frequency modem ΤΓΤη in conjunction with Figure 2A. The high frequency composite signal Vj s from FX or TSl-TSn is coupled via C1 to the frequency selective tuning circuit composed of L1 and C2, and the desired signal is selected. The C2 or L1 inductance can be changed to change the frequency. Coupling to the base of G1, the frequency conversion amplifier circuit composed of G1 becomes the specified frequency, changing the inductance of C3, C4, C5, C6 or L3, L4, L5 can change the frequency, and is coupled to the base of G2 via L6. After being amplified by G2, it is coupled by C8 and C9 and converted to the impedance required by IC1 by R7, R8, and R9. It is input to the 20-pin of digital high-frequency demodulation integrated circuit IC1, processed by IC2 internal circuit, and outputted at the 7th pin. The baseband signal Uxs, which is the uplink signal of the user's ϋχΓυχn or the front end of Wl-Wn.

The dual audio control device and the dual audio control digital high frequency modulator according to the present invention can be applied in a trunk line network of broadcasting and television. And the invention supports multiple communication protocol operations, and is particularly suitable for digital information applications in industries such as broadcasting, telecommunications, e-government, e-commerce, etc., which is beneficial to the upgrading and upgrading of the industry. When upgrading, the main change server execution program can be avoided. The level causes a huge economic loss in the elimination of hardware equipment.

The invention has the following advantages:

1. The existing telecommunication interactions use dual audio address commands, and there are physical links with low interaction rate and high rate and large capacity.

3. The invention can make the program information of the broadcast television with the double audio address encoding header and the signal tail, realize high-speed distribution, automatic start-up acceptance and automatic shutdown of the client.

4. The invention can conveniently implement multi-function remote intelligent control by controlling the power supply current. 5. Since the dual audio coded signal is reliable, low in cost, long in application history, and conforms to the application habits of the public, the present invention can be implemented on a fixed telephone and a hand-held telephone, and is easy to apply.

While the preferred embodiment of the present invention has been described, the invention is intended to be illustrative only, and those of ordinary skill in the art will understand that the invention is not limited to the described preferred embodiments, and Various changes and modifications can be made within the scope and scope of the invention as defined by the appended claims.

Claims

Rights request

1. A dual audio control device, comprising:

a dual audio decoding circuit, configured to receive an analog baseband signal with a dual audio address encoding, decode the analog baseband signal according to the dual audio address encoding, and output two sets of binary audio encoding signals;

a dual audio decoding circuit, configured to receive the two sets of binary dual audio encoded signals and decode them into a decimal two-tone encoded signal; and

The dual audio code switch circuit is configured to receive the decimal two-tone coded signal and output a power control current.

2. The dual audio control device of claim 1, wherein the dual audio encoding switch circuit comprises:

a boot address encoding combination circuit portion, configured to receive a header in the decimal diphonic encoded signal, to generate a power control current;

And a shutdown coding circuit portion, configured to receive a signal tail in the decimal di audio coded signal, generate a shutdown signal, and control the power-on address coding combination circuit to be partially turned off.

3. A dual audio control digital high frequency modulator comprising:

An analog to digital conversion circuit for receiving a digital baseband signal with a double audio address code and converting it into an analog baseband signal;

a dual audio decoding circuit, configured to receive an analog baseband signal from the analog to digital conversion circuit, decode the analog baseband signal according to a dual audio address encoding header, and output two sets of binary audio encoding signals;

a Chinese audio decoding circuit, configured to receive the two sets of binary dual audio encoded signals and decode them into a decimal two-tone encoded signal;

a dual audio coding switch circuit, configured to receive the decimal di audio coded signal, when the decimal dich coded signal includes the header, output a power control current, when the decimal dicode encoded signal includes the At the end of the signal, the power control current is not output;

a digital high-frequency modulation part, configured to receive a corresponding one-way downlink multi-channel digital baseband signal with a plurality of user address codes from the switch, and modulate the one-way downlink multi-channel digital baseband when receiving the power control current a signal, and outputting a downlink high frequency composite signal of a natural frequency; and And a frequency conversion portion configured to receive the downlink high frequency composite signal of the natural frequency from the digital high frequency modulation portion and convert it into a downlink high frequency composite signal having a frequency corresponding to a user address code.

4. The dual tone control digital high frequency modulator of claim 3, wherein the dual audio coded switch circuit comprises:

The power-off coding circuit portion is configured to receive a signal tail in the decimal dual-tone coded signal, generate a shutdown signal, and control the power-on address coding combination circuit to be partially turned off.