CN207135085U - A kind of analog voice based on radio station/digital speech handover module - Google Patents

Abstract

The utility model discloses a kind of analog voice based on radio station/digital speech handover module, including voice signal acquiring unit, acoustic code unit, modem module and speaker unit；Voice signal acquiring unit is used to convert sound into analog voice signal；Acoustic code unit is used for the audio digital signals after analog voice signal is encoded into audio digital signals and demodulates modem module and is decoded into analog voice signal；The audio digital signals that modem module is used for the analog voice signal and acoustic code cell encoding for obtaining voice signal acquiring unit are modulated and are demodulated the low frequency signal of reception；Speaker unit is used to the analog voice signal of modem module demodulation and the decoding of acoustic code unit being converted to sound.The utility model, which realizes, to carry out the transmission and reception of audio digital signals and analog voice signal according to demand, and then realizes the transmission demand of different types of voice signal, and its is simple in construction, cost is low.

Description

A kind of analog voice based on radio station/digital speech handover module

Technical field

The utility model is related to transmitting voice signal technology, more particularly, to a kind of analog voice based on radio station/ Digital speech handover module.

Background technology

The transmission means of voice signal mainly has two kinds, and one kind is audio digital signals, and it has strong interference immunity, transmission Distance, the availability of frequency spectrum are low, are easy to the advantages that encryption, but its circuit structure is complicated, and another kind is analog voice signal, its Signal is more directly perceived, hardware circuit requirement is simple, manufacturing cost is cheap, but its confidentiality is poor, easily interference.At present, in general Radio station is more only to set analog voice or digital speech to be transmitted according to its real needs, and it can not adapt to different letters Number transmission demand；Although has there is the radio for being provided simultaneously with analog voice signal and digital transmitting voice signal in the market Platform, but its circuit structure is complicated, cost is high.

Utility model content

The purpose of this utility model is to overcome above-mentioned technical deficiency, propose a kind of analog voice based on radio station/ Digital speech handover module, different signal transmission demands and circuit knot can not be adapted to by solving radio station's presence in the prior art The complicated technical problem of structure.

To reach above-mentioned technical purpose, the technical solution of the utility model provides a kind of simulation language based on radio station Sound/digital speech handover module, including voice signal acquiring unit, acoustic code unit, modem module and speaker unit；It is described Voice signal acquiring unit is used to convert sound into analog voice signal；The acoustic code unit is used to voice signal obtaining list The analog voice signal that member obtains is encoded into audio digital signals and for the digital speech letter after modem module is demodulated Number it is decoded into analog voice signal；The modem module is used for the analog voice signal for obtaining voice signal acquiring unit And the audio digital signals of acoustic code cell encoding are modulated and are used to the low frequency signal of reception being demodulated；It is described to raise one's voice Unit is used to the analog voice signal of the analog voice signal of modem module demodulation and the decoding of acoustic code unit being converted to sound Sound.

Compared with prior art, the utility model directly can be obtained voice signal acquiring unit by modem module Analog voice signal modulation after sent by radio-frequency module, voice signal acquiring unit can also be obtained by acoustic code unit The analog voice signal taken is modulated by modem module again after being encoded to audio digital signals, and is sent out by radio-frequency module Go；The analog voice signal of modem module demodulation simultaneously can be converted directly into sound, and the audio digital signals that it is demodulated are then Sound can be converted to after the decoding of acoustic code unit, it, which is realized, can carry out audio digital signals and analog voice letter according to demand Number transmission and reception, and then realize the transmission demand of different types of voice signal, and its is simple in construction, cost is low.

Brief description of the drawings

Fig. 1 is the connection block diagram of the analog voice based on radio station/digital speech handover module of the present utility model；

Fig. 2 is that the circuit theory of the analog voice based on radio station/digital speech handover module of the present utility model is shown It is intended to.

Embodiment

In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining The utility model, it is not used to limit the utility model.

As shown in Figure 1 and Figure 2, the utility model provides a kind of analog voice based on radio station/digital speech switching Module 100, including voice signal acquiring unit 11, acoustic code unit 12, modem module 13, speaker unit 14, first choice The selecting unit 16 of unit 15 and second.

Voice signal acquiring unit 11 includes a sound pick-up U5 and one for being used to convert sound into analog voice signal and used In the first amplifier U3 of the analog voice signal filter and amplification for changing sound pick-up U5, sound pick-up U5 is specifically made up of miaow head, It can realize the conversion of acoustoelectric signal, and the first amplifier U3 can use an operational amplifier, and it can be by voice mould that miaow head is changed Intend signal and be filtered amplification, it can use model LMV931 operational amplifier.

First choice unit 15 is mainly used in control voice signal acquiring unit 11 and acoustic code unit 12 or modulation /demodulation list Member 13 electrically connects, and it can use single-pole double-throw switch (SPDT) chip K1, the 3rd pin of the single-pole double-throw switch (SPDT) chip K1 inputs and the One amplifier U3 output end connection, the 1st pin of its output end and the 2nd pin respectively with modem module 13 and acoustic code list Member 12 connects.Wherein, single-pole double-throw switch (SPDT) chip K1 can use model ADG819 selecting switch.

Acoustic code unit 12 is used to the analog voice signal that voice signal acquiring unit 11 obtains being encoded into digital speech letter Number, and modem module 13 is sent it to, while its audio digital signals solution after can modem module 13 be demodulated Code exports into analog voice signal, and by its speech output end.Acoustic code unit 12 can use an acoustic code chip U2, and its voice is defeated Enter end to be connected with the 2nd pin of single-pole double-throw switch (SPDT) chip K1 output end, when single-pole double-throw switch (SPDT) chip K1 connects acoustic code core During piece U2 and the first amplifier U3, acoustic code chip U2 can will amplify filtered analog voice signal and encode to form digital speech letter Number.The acoustic code unit 12 of the present embodiment can specifically use model CMX618 vocoder.

Modem module 13 is used for the analog voice signal and acoustic code unit 12 for obtaining voice signal acquiring unit 11 The audio digital signals of coding are modulated and are used to the low frequency voice signal of reception being demodulated.Modem module 13 Specific cocoa uses a modem chip U1, its phonetic entry end and the 1st pipe of single-pole double-throw switch (SPDT) chip K1 output end Pin connects, when single-pole double-throw switch (SPDT) chip K1 connection modem chips U1 phonetic entry end is with the first amplifier U3, its Analog voice signal after filter and amplification can be modulated, in order to which follow-up radio-frequency module 200 is transferred out, and adjusted Demodulation chip U1 processed spi bus interface is connected with acoustic code chip U2 CBUS EBIs, and it can compile acoustic code chip U2 The audio digital signals of code are modulated；Meanwhile the voice signal that radio-frequency module 200 receives is also sent to modem chip U1, the low frequency voice signal of reception can be demodulated, be easy to be subsequently formed sound by it；Wherein, modem chip U1 type Number it is CMX7141, it is built-in with two modulators and a demodulator, output signal interface MOD1, MOD2 of two modulators And input signal interface RX_I, RX_Q of demodulator are connected with radio-frequency module 200, and MCU module 300 then with modulatedemodulate aligning Piece U1 CBUS EBIs are connected in order to control modem chip U1 to work.

Second selecting unit 16 is used for speaker unit 14 and the output end of acoustic code unit 12 or modem module 13 electricity Connection, and then selectable analog voice signal or audio digital signals are converted into sound.It can specifically use single-pole double throw Switch chip K2, the 1st pin of single-pole double-throw switch (SPDT) chip K2 input is connected with acoustic code chip U2 speech output end, 2nd pin is connected with modem chip U1 speech output end, and the 3rd pin of its output end then connects with speaker unit 14 Connect.It can be used and the model identical selecting switch of first choice unit 15.

Speaker unit 14 includes one and is used to the second amplifier U4 of analog voice signal filter and amplification and one being used for the The analog voice signal of two amplifiers filtering U4 amplifications is converted to the loudspeaker U6 of sound, the second amplifier U4 signal input part It is connected with single-pole double-throw switch (SPDT) chip K2 the 3rd pin, signal output part and loudspeaker U6 connections.Wherein, the second amplifier U4 Also model LMV931 operational amplifier can be used.

The analog voice of the present embodiment/digital speech handover module workflow is as follows：When signal is launched, sound pick-up U5 will Sound is converted to electric signal, and electric signal is filtered enhanced processing and forms analog voice signal by the first amplifier U3, when When needing to select analog voice signal transmission, then the first amplifier U3 and modulation /demodulation are turned on by single-pole double-throw switch (SPDT) chip K1 Chip U1 phonetic entry end, analog voice signal are directly modulated by modem chip U1, and radio frequency is delivered to after modulation Module 200 is simultaneously launched with radio format, and when needing to select audio digital signals transmission, then opened by single-pole double throw Chip K1 conductings the first amplifier U3 and acoustic code chip U2 phonetic entry end is closed, acoustic code chip U2 is carried out to analog voice signal Encode and send to modem chip U1, radio-frequency module 200 is delivered to and with radio shape after modem chip U1 modulation Formula is launched；When signal receives, radio-frequency module 200 can receive the low frequency signal after frequency conversion, and pass through modem chip U1, when selecting analog voice signal, then single-pole double-throw switch (SPDT) chip K2 turn on modem chip U1 speech output end and Second amplifier U4, the analog voice signal by modem chip U1 conditionings is directly by the second amplifier U4 filter and amplifications Afterwards, sound is converted to by loudspeaker U6, and when selecting audio digital signals, then single-pole double-throw switch (SPDT) chip K2 turns on acoustic code core Piece U2 speech output end and the second amplifier U4, then first passed around by the modem chip U1 audio digital signals nursed one's health Acoustic code chip U2 decodes to form analog voice signal, is then converted to again by the second amplifier U4 filter and amplifications and by loudspeaker U6 Sound.

Specific embodiment of the present utility model described above, the restriction to scope of protection of the utility model is not formed. Any various other corresponding changes and deformation made according to technical concept of the present utility model, should be included in this practicality In new scope of the claims.

Claims (6)

1. a kind of analog voice based on radio station/digital speech handover module, it is characterised in that obtained including voice signal Unit, acoustic code unit, modem module and speaker unit；The voice signal acquiring unit is used to convert sound into simulation Voice signal；The acoustic code unit is used to the analog voice signal that voice signal acquiring unit obtains being encoded into digital speech letter Number and be decoded into analog voice signal for the audio digital signals after modem module is demodulated；The modulation /demodulation list The audio digital signals that member is used for the analog voice signal and acoustic code cell encoding for obtaining voice signal acquiring unit are adjusted Make and be used to the low frequency signal of reception being demodulated；The speaker unit is used for the simulation language for demodulating modem module Sound signal and the analog voice signal of acoustic code unit decoding are converted to sound.

2. the analog voice based on radio station/digital speech handover module according to claim 1, it is characterised in that The analog voice/digital speech handover module also includes being used to electrically connect voice signal acquiring unit and acoustic code unit or modulation The first choice unit of demodulating unit, and for electrically connecting speaker unit and the second selection of acoustic code unit or modem module Unit.

3. the analog voice based on radio station/digital speech handover module according to claim 2, it is characterised in that The voice signal acquiring unit includes the sound pick-up and one for converting sound into analog voice signal and is used for pickup First amplifier of the analog voice signal filter and amplification of device conversion.

4. the analog voice based on radio station/digital speech handover module according to claim 3, it is characterised in that The speaker unit includes one and is used to the second amplifier of analog voice signal filter and amplification and one being used for the second amplifier The analog voice signal of filter and amplification is converted to the loudspeaker of sound.

5. the analog voice based on radio station/digital speech handover module according to claim 4, it is characterised in that The modem module is a modem chip, its model CMX7141；The acoustic code unit is an acoustic code chip, its Model CMX618；The first choice unit and the second selecting unit are single-pole double-throw switch (SPDT) chip, and its model is ADG819。

6. the analog voice based on radio station/digital speech handover module according to claim 5, it is characterised in that The model of first amplifier and the second amplifier is LMV931.