CN1045853C

CN1045853C - Speech-controlled mobile transceiver

Info

Publication number: CN1045853C
Application number: CN95111582A
Authority: CN
Inventors: 缪民强; 缪洲晖; 缪洲荣
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-03-31
Filing date: 1995-03-31
Publication date: 1999-10-20
Anticipated expiration: 2015-03-31
Also published as: CN1132425A

Abstract

The present invention relates to a voice controlled mobile radio station which comprises an ordinary radio station and a voice control device, wherein the voice control device is used for controlling the receiving and sending conversion of the ordinary radio station; a voice transmitter of the voice control device and a voice channel behind the voice microphone are used for providing decision electric level for a decision machine; an additionally arranged noise transmitter and a noise channel behind the noise transmitter are used for providing threshold electric level for the decision machine; the noise transmitter can be arranged on the back surface and the side surface of microphone hand-hold microphones or hand-hold radio stations, above or under microphone hand-hold microphones or hand-hold radio stations. The present invention can effectively prevent external sound interference to cause the wrong transmission of the voice controlled radio station; when the radio station is in a frequency modulation system, the present invention also eliminates talking leakage and impact noise which are caused by the inertance of noise silencing devices of frequency modulation receivers by being additionally provided with a voice delayer, a waveshape processor or a derailing switch.

Description

Speech-controlled mobile transceiver

An a kind of receipts/switch technology that relates to by speech fork-like farm tool used in ancient China control mobile station belongs to the radio communication technology field.

At present, general simplex station, all control its transmitting-receiving conversion by manual operation button fork-like farm tool used in ancient China, give and use the inconvenience of band fork-like farm tool used in ancient China, as far back as the sixties, domestic just someone proposes to receive/send out conversion plan by speech fork-like farm tool used in ancient China control simplex station, its method is, increases a voice control device in common mobile station, allows the output voltage of transmitter, except sending to modulation transmitter, also send to voice control device, in this device, through amplifying, form the input that decision level is delivered to decision device after detection and the voltage adjustment, the threshold level of decision device is provided by a fixing direct voltage, the receipts in the output voltage control radio station of decision device/send out conversion, and decision level is lower than threshold level when keeping silence, the output voltage of decision device is a low level, makes the radio station be in accepting state; During speech, make decision level be higher than threshold level, the output voltage of decision device is a high level, and the radio station is in emission state, such sound-controlled apparatus, and also the transmitter in may command duplex radio station makes its transmitter work when speech, Transmitter Turn-Off when keeping silence; But, because extraneous big sound swashs strive forward, sound-controlled apparatus is easy to generate empty control, causes the radio station to mistakenly launch, United States Patent (USP) 41875483 in 1979 proposes to replace acoustic conductance formula transmitter method commonly used with bone conduction formula laryngaphone fork-like farm tool used in ancient China, but must be fastened on because of this transmitter on user's the neck, the people is not felt well, be difficult to promote the use of, in addition, when the radio station was the frequency modulation standard, the impact noise output of caused leakage words of the inertia of static limiter and pulse form also was difficult to solve in the FM receiver.

The objective of the invention is to improve the anti-extraneous acoustic jamming ability in speech control radio station, make radio station reliably working in the bigger environment of background noise, prevent that effectively extraneous acoustic jamming from causing that the radio station mistakenly launches, another purpose is when speech control radio station is the frequency modulation standard, under the prerequisite that does not reduce original noise quieting sensitivity, eliminate by caused leakage words of the inertia of FM receiver static limiter and impact noise output.

Technical scheme of the present invention comprises a common radio station and a voice control device, and the radio station can be simplex station or duplexing radio station, and amplitude modulation radio set, FM radio station or single sideband radio stations when the radio station is frequency modulation system, also comprise the static limiter in the FM receiver; The voice control device of control radio station anti T-R device, except the speech channel that speech transmitter and back thereof are arranged, the noise transmitter identical and the noisy channel of back thereof have been set up with speech transmitter characteristic, the output voltage of noisy channel is given decision device as threshold level, the output voltage of speech channel is given decision device as decision level, the gain that makes noisy channel is greater than the gain of speech channel more than 4 decibels, thereby can prevent effectively that the void that background noise causes from declaring, improve the ability of anti-extraneous acoustic jamming, noise transmitter and speech transmitter are located at diverse location on the radio station respectively, voltage adjuster in the noise channel is subjected to the outgoing signaling voltage control of receiver, when receiver is received signal, export a signaling voltage increment, improve the threshold level of decision device, prevent that the acoustic jamming of loud speaker 4 from causing that transmitter mistakenly launches; Two wave detectors in speech channel and the noisy channel all adopt envelope detection circuit; Triggering-holding circuit of output access in the decision device back with door, between decision device and triggering-holding circuit with door, an one input is controlled by the output voltage of a monostable trigger-action circuit of control by the output voltage of voice control device, when the output voltage of voice control device is transformed into low level from high level, when the radio station is transformed into accepting state from emission state, in the negative sense arteries and veins that width of monostable trigger-action circuit output is 100-300ms, make this output voltage remain low level in during this pulse persistance with door, thereby cut off the output of decision device of short durationly, prevent the interference that radio station transmitting-receiving transfer process produces voice control device; When the radio station is frequency modulation system, before the squelch switch circuit of receiver static limiter, insert a speech delayer, its delay time prolongs 5-10ms during than the cut-out of squelch switch circuit; Output at the noise elimination voltage forming circuit of static limiter inserts a waveform processor, forms new noise elimination voltage with control squelch switch circuit, makes the amount of delay big 5-10ms of its connection time delay than speech delayer; Perhaps set up a derailing switch at the input of speech delayer, its characteristic is consistent with the characteristic of squelch switch circuit, and controlled by the output voltage of noise elimination voltage forming circuit.

Advantage of the present invention is that the anti-extraneous acoustic jamming ability in radio station is strong, makes speech control radio station reliably working in the bigger environment of background noise, prevents that effectively extraneous acoustic jamming from causing that the radio station mistakenly launches; When speech control radio station is the frequency modulation standard, under the prerequisite that does not reduce original noise quieting sensitivity, can eliminate by caused leakage words of the inertia of FM receiver static limiter and impact noise output.

The present invention has following accompanying drawing, and accompanying drawing is made brief description:

Accompanying drawing 1 is the block diagram of speech-controlled mobile transceiver.

Accompanying drawing the 2, the 3rd, the static limiter block diagram of FM receiver when the radio station is the frequency modulation standard.

Below in conjunction with description of drawings principle of the present invention and embodiment.

As seen from Figure 1,1 is common radio station among the figure, and 2 is voice control device, and 3 is antenna, and 4 is loud speaker, and 5 is the speech transmitter; Radio station 1 is by transmitter 6, and receiver 7 and antenna switching unit 8 are formed, and the antenna switching unit of simplex station is the HF switch device, when accepting state, antenna and receiver inlet is joined, and during emission state, the output of antenna and transmitter is joined; The radio station can be simplex station or duplexing radio station, amplitude modulation radio set, FM radio station or single sideband radio stations; The output of speech transmitter 5 divides two the tunnel, one the tunnel delivers to the input of transmitter 6 in the radio station 1, with the modulate emission signal, for the slow radio station of transmitting-receiving conversion, for anti-leak-stopping words, speech input at transmitter, insert a suitable speech delayer, the input of the speech channel 9 in the voice control device 2 is delivered on another road, speech channel 9 is by amplifier 10, and wave detector 11 and voltage adjuster 12 cascades are formed, and wherein the working band of amplifier 10 is 300-4000HZ, wave detector 11 adopts envelope detection circuit, speech channel amplifies the input voltage of transmitter 5, detection and adjustment back form output voltage U 2, deliver to the decision level input of decision device 13, adjust voltage and transfer device 12, make when the output voltage of speech transmitter 5 is zero, decision level U2 is near zero potential; 14 is the noise transmitter among the figure, its characteristic is identical with speech transmitter 5, but both are positioned over diverse location, to handheld mike or hand-hold type radio station, noise transmitter 14 can be positioned over hand microphone or radio station the back side, side, above or below, make when pressing close to or aim at the speech of speech transmitter, noise transmitter output voltage is as much as possible little, make in this case, the output speech voltage of speech transmitter 5 is higher than noise transmitter 14 output speech voltages more than 8 decibels; The output voltage of noise transmitter 14 is delivered to the input of the noisy channel 15 in the voice control device, the characteristic of noisy channel 15 is identical with the characteristic of speech channel 9, amplifier 16 by frequency range 300-4000HZ, envelope detector 11 and voltage adjuster 17 cascades are formed, its output voltage U 3 is delivered to the threshold level input of decision device 13, adjust adjuster 16, make that threshold level U3 is 0.1-0.5v when the output voltage of noise transmitter is zero, voltage adjuster 16 also is subjected to outgoing signaling voltage U 4 controls of receiver 7, when receiving signal, U4 is a high level, control voltage adjuster 16 makes threshold level U3 obtain a voltage increment, the neglecting actual needs greatly of increment and deciding; When receiver was not received signal, U4 was a low level, and U3 returns to former fork-like farm tool used in ancient China value; In view of the above, when transmitter 5 and transmitter 14 all during no-voltage output, because decision level U2 is than the low 0.1-0.5v of threshold level U3, so the output voltage U 5 of decision device 13 remains low level; Adjust the amplification quantity of amplifier 10 and 16, make when the user presses close to or aims at speech transmitter 5 and talk with normal quantity, decision level U2 is stably greater than threshold level U3, thereby make the output voltage U 5 of declaring device 13 be high level, under these conditions, continue to adjust the amplification quantity of amplifier 10 and 16, make the amplification quantity of amplifier 16 exceed the amplification quantity of amplifier 10 more than 4 decibels; The output voltage U 5 of decision device 13 is delivered to an input with door 18, provide by the output voltage U 6 that is subjected to speech control to adorn the monostable trigger-action circuit 19 of 2 output voltage U 1 control with another input of door 18, it when U6 is flat high level, so it is consistent with its incoming level U5 with the output voltage U 7 of door 18, U7 is transported to the input of triggering-holding circuit 20, so when U7 was high level, the output U8 of triggering-holding circuit 20 also was a high level; When U7 was transformed into low level from high level, U8 will keep a period of time at high level, and then suddenlyd change to low level, and by this measure, the valley point that can prevent the speech syllable effectively causes the interruption of sound control voltage; The output voltage U 8 of triggering-holding circuit 20 is delivered to another and a door input of 22, should control by the output voltage U 9 of operating state derailing switch 21 with another input of door, this switch has two positions, " wait for " position, position " and " conversation "; output voltage U 9 is low level when placing " waiting for " position; thus and door 22 sealings; make that its output voltage U 1 is permanent to be low level; when putting 21 during; U9 is a high level for " conversation ", make consistent with door 22 output voltage U 1 with its input voltage U8, thereby the radio station has been controlled by voice control device just can; When U1 jumps to low level moment from high level, a negative sense transition pulse will appear in the output voltage U 6 of monostable trigger-action circuit 19, and its width is 100-300ms, and this negative-going pulse makes and 18 sealing a period of times of door; In the present invention, speech control device 2 also can lump together with speech transmitter 5 and make a complete sound control microphone and independently use; Fig. 2 and Fig. 3 are for when the sound control radio station is the frequency modulation standard, and the present invention gives the functional-block diagram of two novel static limiters of existing FM receiver design, and 23 is existing static limiters among the figure, comprises noise elimination voltage forming circuit 24 and squelch switch circuit 25; Circuit 24 is by Lu, arrowband ripple device circuit 26, amplification demodulatoring circuit 27 and shaping circuit 28 cascades are formed, what the present invention set up is speech delayer 29 and waveform processor 30 or derailing switch 31, U10 is the output voltage of FM receiver frequency discriminator among Fig. 2, U10 one tunnel delivers to the input of noise elimination voltage forming circuit 24, through the Lu ripple, form original noise elimination voltage U 11 after amplification demodulator and the shaping, and deliver to the input of waveform processor 30, form after treatment and connect the noise elimination voltage U 12 that time delay equals to cut off time delay, and control squelch switch circuit 25 with fork-like farm tool used in ancient China; The input of speech delayer 29 is delivered on another road of frequency discriminator output voltage U 10 among Fig. 2, select the amount of delay of this delayer to equal to cut off time delay, its output voltage U 13 is delivered to the input of squelch switch circuit 25, like this, owing to no longer include the time difference between the input voltage U13 of switching circuit 25 and the squelch control voltage U 12, so after above-mentioned processing, new static limiter no longer exists to be connected time delay and cuts off time delay, thereby has eliminated the impact noise output of the leakage words and the pulse form of original static limiter band fork-like farm tool used in ancient China; Fig. 3 is that to connect delay volumes little when original noise elimination voltage U 11, improvement project of the present invention when its caused leakage words phenomenon can be ignored, as seen from Figure 3, a road of frequency discriminator output voltage U 10 input of still delivering to noise elimination voltage forming circuit 24 in this scheme, its formed noise elimination voltage U 11 is directly with fork-like farm tool used in ancient China control squelch switch circuit 25 and newly-increased derailing switch 31, U10 a road through derailing switch 31, deliver to the input of squelch switch circuit 25 behind the speech delayer 29, so its output voltage U 14 impact noise can not occur again yet, owing to suppose that original connection time delay is little, also can ignore so leak words; The speech delayer of setting up in the static limiter 23 in the receiver 29, waveform processor 30 or derailing switch 31 also can be used for not doing the common FM receiver in speech control radio station; Voice control device 2 also can be used in other equipment that need utilize control of speech fork-like farm tool used in ancient China and the anti-external sound interference of requirement energy.

Claims

1, a kind of mobile station with speech fork-like farm tool used in ancient China control transmitting-receiving conversion, comprise radio station (1), voice control device (2), radio station (1) can be simplex station or duplexing radio station, amplitude modulation radio set, FM radio station or single sideband radio stations, when radio station (1) is frequency modulation system, also comprise static limiter (23), it is characterized in that: the voice control device (2) of the anti T-R device (8) in control radio station (1), except be provided with speech transmitter (5) and connect later speech channel (9), set up the noise transmitter (14) identical with transmitter (5) characteristic and connect later noisy channel (15), the output voltage U 2 of the output voltage U 3 of noisy channel (15) and speech channel (9) is given decision device (13), the gain of noisy channel (15) is greater than the gain of speech channel (9) more than 4 decibels, and noise transmitter (14) and speech transmitter (5) are located at the diverse location on the radio station respectively.

2, by the described mobile station of claim 1, it is characterized in that: when radio station (1) is adopted handheld mike or is the hand-hold type radio station, noise transmitter (14) can place the back side, side, top, the below in microphone or hand-hold type radio station or other are when the user presses close to or aims at the speech of speech transmitter, the speech output that noise transmitter (14) picks up, as far as possible little place, make in this case, the output speech voltage of speech transmitter (5) is higher than noise transmitter (14) output speech voltage more than 8 decibels.

3. by the described mobile station of claim 1, it is characterized in that: the voltage adjuster (17) in the noise channel (15) is connected and is subjected to outgoing signaling voltage U 4 controls of receiver (7) with receiver (7).

4. by the described mobile station of claim 1, it is characterized in that: controlled by the output voltage U 6 of a monostable trigger-action circuit of control (19) by the output voltage U 1 of voice control device (2) with an input of door (18), the output width of monostable trigger-action circuit (19) is the negative-going pulse of 100-300ms.

5, by the described mobile station of claim 1, it is characterized in that, when radio station (1) is frequency modulation system, at squelch switch circuit (a 25) speech delayer of preceding access (29) of static limiter (23), its delay time prolongs 5-10ms during than the cut-out of squelch switch circuit; Output at the noise elimination voltage forming circuit (24) of static limiter (23) inserts a waveform processor (30), form new noise elimination voltage U 12 with control squelch switch circuit (25), make it connect the amount of delay big 5-10ms of time delay than speech time delay device (29); Perhaps set up a derailing switch (31) at the input of speech delayer (29), its characteristic is consistent with the characteristic of squelch switch circuit (25), and is subjected to output voltage U 11 controls of noise elimination voltage forming circuit (24) jointly.

6, by the described mobile station of claim 1, it is characterized in that voice control device (2) also can be used in other equipment that need utilize control of speech fork-like farm tool used in ancient China and the anti-external sound interference of requirement energy.

7, by the described mobile station of claim 4, it is characterized in that the speech delayer (29) set up in the static limiter (23) in the FM receiver, waveform processor (30) or derailing switch (31) also can be used for not doing the common FM receiver in speech control radio station.

8, by the described mobile station of claim 1, it is characterized in that voice control device (2) together with transmitter (5), can device be that a complete sound control microphone independently uses.