CN2327129Y - High-speed digital-transmission voice compact pager - Google Patents

Abstract

The utility model relates to a speech pager which comprises a control circuit and a receiving circuit for receiving frequency modulated signals. The utility model is characterized in that a digital signal D is separated by the receiving circuit after two-time selection and demodulation; after receiving the digital signal D, the control circuit carries out diffusion, conversion and decoding, and then sends out control commands to respectively control a sound recording module, a vibration motor, a power amplifier, a power amplification power supply control circuit and an intermittent power supply control circuit so as to realize the playback of the converted speech. Compared with the prior art, the utility model can realize complete data transmission and effectively enlarge the user capacity of a speech paging station, and the utility model has very strong communication security.

Description

High-speed digital transmission compress speech beep-pager

The utility model relates to voice paging machine field, and especially number passes the compress speech beep-pager.

In the prior art, the development of relevant beep-pager, existing both at home and abroad many products.After general numeral demonstration, literal display pager, there is multiple voice paging machine to come out again.The voice paging machine has solved the paging people and has utilized beep-pager directly to the problem of phone-holder's conversation, is applicable to the inconvenient area of making a phone call, and is particularly useful for night and amblyopia power people's use.But the shortcoming that its exists is to simulate signal to transmit aerial confidentiality poor, and it is little to simulate the speech communication capacity, and paging centers is very limited, and desire improves the economic benefit of paging centers, then must solve the capacity problem of speech communication.

At the shortcoming that exists in the above-mentioned prior art, the purpose of this utility model provides a kind of high-speed digital transmission compress speech beep-pager, it uses voice compression technique, utilize the maximum spectrum section of the whole bandwidth of SCA to improve the emission message transmission rate, to increase the compress speech ratio, thereby can enlarge the user capacity of voice paging platform, not only easy to use but also good confidentiality.

In order to reach above-mentioned goal of the invention, the technical solution of the utility model realizes as follows: high-speed digital transmission compress speech beep-pager comprises receiving loop of being made up of the receiver, subcarrier frequency selector, the subcarrier frequency demodulator that receive FM signal and the control loop that forms the thick film integrated circuit of being made up of decompression machine, decoder, microcontroller.The characteristics of its annexation are, the output composite signal was undertaken isolating digital signal D after twice selection, the demodulation by subcarrier frequency selector and subcarrier frequency demodulator after described receiver was received and notified from a phone call signal and the synthetic frequency modulation electromagnetic wave that forms of stereophonic signal, and this digital signal D comprises speech data information DATD, grouies busy yard PD and selective call sign indicating number PS; Store the diffusion transforms decode and send control command behind the described thick film integrated circuit receiving digital signals D, control recording piece, vibrating motor, amplifirer, amplifier power supply control loop respectively and be interrupted power control loop, the power interface that power supply is interrupted control loop and receiver joins, the other end that power supply is interrupted control loop inserts the amplifier power supply control loop, the outlet and the amplifirer of amplifier power supply control loop join, amplifirer joins with the recording piece in addition, is realized the voice playback that is converted by loud speaker by operating key.

According to above-mentioned technical scheme, the type of attachment of described receiving loop adopts the resonant tank reception of being made up of by squaerial and tunable capacitor, electric capacity the FM signal of f-m broadcast station emission, amplify through two triode shunt-resonant circuits, export useful high-frequency signal and deliver to the receiving integrate circuit plate, this plate and external crystal oscillator mixing draw 10.7MHZ first intermediate-freuqncy signal.Through filter filtering, in put, detection, demodulate the subcarrier frequency signal of stereophonic signal and paging information, again from this plate output.The resonant tank of being made up of two electric capacity, oscillator coils is selected the subcarrier frequency signal and is amplified through two triode two-stages and send into second demodulator, this demodulator and external crystal oscillator mixing, draw 455KHZ second intermediate-freuqncy signal, through filter filtering, again through in put, frequency discrimination, demodulate digital speech information and paging code after from the output of this demodulator, the useful digital information D of output after shaping is amplified in the triode pulse.

The utility model can be realized high speed data transfer owing to adopted voice compression technique, therefore can enlarge the user capacity of voice paging platform effectively.Radio paging is a kind of open transmission in addition, do not have special measure, easily monitored, eavesdrop, and be provided with special-purpose decompression device and strict Synchronous Processing step in the set thick film integrated circuit in the utility model, therefore can't monitor and eavesdrop, have very strong communication security performance.It is not only applicable to civilian voice paging, more is applicable to the secure voice paging of systems such as public security, army, national defense industry, is the regeneration product of speech communication.

The utility model is described in further detail below in conjunction with accompanying drawing and concrete execution mode.

Fig. 1 is a fundamental diagram of the present utility model;

Fig. 2 is the receiving loop part of physical circuit connection layout of the present utility model;

Fig. 3 is the control loop part of physical circuit connection layout of the present utility model.

Referring to Fig. 1, high-speed digital transmission compress speech beep-pager comprises receiving loop of being made up of the receiver 1, subcarrier frequency selector 2, the subcarrier frequency demodulator 3 that receive FM signal and the control loop that forms the thick film integrated circuit of being made up of decompression machine, decoder, microcontroller 4.The output composite signal was undertaken isolating digital signal D after twice selection, the demodulation by subcarrier frequency selector 2 and subcarrier frequency demodulator 3 after receiver 1 was received and notified from a phone call signal and the synthetic frequency modulation electromagnetic wave that forms of stereophonic signal, and this digital signal D comprises speech data information DATD, grouies busy yard PD and selective call sign indicating number PS; Carry out the diffusion transforms decode and send control command behind the thick film integrated circuit 4 receiving digital signals D, control recording piece 5, vibrating motor 9, amplifirer 6, amplifier power supply control loop 7 respectively and be interrupted power control loop 8, the power interface that power supply is interrupted control loop 8 and receiver 1 joins, the other end that power supply is interrupted control loop 8 inserts amplifier power supply control loop 7, the outlet of amplifier power supply control loop 7 and amplifirer 6 join, amplifirer 6 joins with recording piece 5 in addition, is realized the voice playback that is converted by loud speaker SP by operating key 10.

Referring to Fig. 2 and Fig. 3, Fig. 2 is the circuit connection diagram of receiving loop part of the present utility model, the annexation of concrete circuit is as follows: by the FM signal of f-m broadcast station emission by squaerial and tunable capacitor C1, the resonant tank that capacitor C 2 is formed receives, amplify through triode Q1 and Q2 shunt-resonant circuit, export useful high-frequency signal and deliver to the 16th pin of receiving integrate circuit plate TA7792F, this plate and external crystal oscillator J1 mixing, select 10.7MHZ first intermediate-freuqncy signal, through filter FL1 filtering, in put, detection, demodulate the subcarrier frequency signal of stereophonic signal and paging information, export from the 8th pin of this plate TA7792F again, by capacitor C 20 and C21, the resonant tank that oscillator coil L5 forms is selected the subcarrier frequency signal and is sent into the second demodulator CXA1484M through triode Q3 and the amplification of Q5 two-stage, this demodulator and external crystal oscillator J2 mixing, draw 455KHZ second intermediate-freuqncy signal, through filter FL2 filtering, put in the warp again, frequency discrimination, after demodulating digital speech information and paging code, from this demodulator the 14th pin output, the useful digital information D of output after shaping is amplified in triode Q4 pulse.Fig. 3 is the circuit connection diagram of control loop part of the present utility model, the annexation of concrete circuit is as follows: digital information D comprises speech data information DATD, grouies busy yard PD and selective call sign indicating number PS, wherein speech data information DATD delivers to the 1st, 2 pin of the thick film integrated circuit plate SRC01 that is made up of decompression machine, decoder, microcontroller, grouies busy that a yard PD, selective call sign indicating number PS deliver to the 3rd pin, the 4th pin of this plate respectively.If this machine is exhaled in the address of input, send control command in the thick film integrated circuit plate SRC01 and allow decompression machine begin to receive, and the high bit rate data information memory got up to be reduced into former sound by D/A again and to send commands for controlling recording piece surface-mounted integrated circuit ISD33240 begin recording.Thick film integrated circuit plate SRC01 sends instruction out of service to recording piece surface-mounted integrated circuit ISD33240 behind the End of Tape; While opens amplifirer surface-mounted integrated circuit TDA2022M power supply by the diode D1 in the amplifier power supply control loop, triode Q8 and sends BB sound or promote vibrating motor M by triode Q9 and send vibration in 3 seconds.During playback, when the phone-holder clicks playback button K1, promptly open amplifier power supply, amplifirer surface-mounted integrated circuit TDA2022M starts working and orders recording piece surface-mounted integrated circuit ISD33240 playback and emit voice by loud speaker SP.Also be provided with volume key K2 in this control loop, can adjust playback amount size; Function key K3 can be used for selections; Prompting options button K4 can select BB sound or vibration.Playback finishes, and thick film integrated circuit plate SRC01 control beep-pager is in holding state again.Square wave of this plate output this moment is input to triode Q7 through resistance R 41 to triode Q6 amplification and makes the loop be interrupted conducting, allows channel with 1: 10 switching electricity, to save power consumption.

When using the utility model, the paging people is imported voice into paging centers by phone, paging centers inputs to the broadcasting station frequency modulated transmitter with voice signal, and frequency modulated transmitter can utilize idle secondary channel 76KHZ emission FM signal, and the phone-holder can hear paging people's former voice in time.

Claims (4)

1. high-speed digital transmission compress speech beep-pager, it comprises by the receiver (1) that receives FM signal, subcarrier frequency selector (2), the receiving loop that subcarrier frequency demodulator (3) is formed reaches by decompression machine, decoder, the control loop that the thick film integrated circuit (4) that microcontroller is formed forms, it is characterized in that, the output composite signal entered subcarrier frequency selector (2) after described receiver (1) was received and notified from a phone call signal and the synthetic frequency modulation electromagnetic wave that forms of stereophonic signal, the stereophonic signal of selecting through subcarrier frequency selector (2) and the subcarrier frequency signal of paging information enter subcarrier frequency demodulator (3), isolate digital signal D and enter the described control loop that is formed by thick film integrated circuit (4) after subcarrier frequency demodulator (3) demodulation, this digital signal D comprises speech data information DATD, group busy yard PD and selective call sign indicating number PS; Store the diffusion transforms decode and send control command behind thick film integrated circuit (4) the receiving digital signals D, respectively control recording piece (5), vibrating motor (9), effect device (6), amplifier power supply control loop (7) and interruption power control loop (8); The power interface that power supply is interrupted control loop (8) and receiver (1) joins, the other end that power supply is interrupted control loop (8) inserts amplifier power supply control loop (7), the outlet of amplifier power supply control loop (7) and amplifirer (6) join, amplifirer (6) joins with recording piece (5) in addition, makes loud speaker SP realize the voice playback that is converted by operating key (10) by thick film integrated circuit (4) control amplifirer (6).

2. according to the described high-speed digital transmission compress speech of claim 1 beep-pager, it is characterized in that, the type of attachment of described receiving loop adopts the FM signal of being launched by f-m broadcast station by squaerial and tunable capacitor C1, the resonant tank that capacitor C 2 is formed receives, amplify through triode Q1 and Q2 shunt-resonant circuit, export useful high-frequency signal and deliver to receiving integrate circuit plate TA7792F, this plate and external crystal oscillator J1 mixing, select 10.7MHZ first intermediate-freuqncy signal, through filter FL1 filtering, in put, detection demodulates the subcarrier frequency signal of stereophonic signal and paging information and exports from this plate TA7792F, by capacitor C 20 and C21, the resonant tank that vibration line chart L5 forms is selected the subcarrier frequency signal and is sent into the second demodulator CXA1484M through triode Q3 and the amplification of Q5 two-stage, this demodulator and external crystal oscillator J2 mixing, draw 455KHZ second intermediate-freuqncy signal, through filter FL2 filtering, put in the warp again, frequency discrimination, export the useful digital information D of output after shaping is amplified in triode Q4 pulse after demodulating digital speech information and paging code from this demodulator.

3. according to claim 1 or 2 described high-speed digital transmission compress speech beep-pagers, it is characterized in that the specification of the surface-mounted integrated circuit of the thick film integrated circuit in the described control loop (4) is SRC01; The specification of the surface-mounted integrated circuit of recording piece (5) is ISD33240; The specification of the surface-mounted integrated circuit of amplifirer (6) is TDA2022M.

4. according to the described high-speed digital transmission compress speech of claim 3 beep-pager, it is characterized in that, it is by square wave of thick film integrated circuit (4) output that described power supply is interrupted control loop (8), be input to triode Q7 through resistance R 41 to triode Q6 amplification and make the loop be interrupted conducting, allow channel with switching in 1: 10.

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