CN102752068A - Communication system, transmitting apparatus, receiving apparatus and communication method - Google Patents
Communication system, transmitting apparatus, receiving apparatus and communication method Download PDFInfo
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- CN102752068A CN102752068A CN2012100465796A CN201210046579A CN102752068A CN 102752068 A CN102752068 A CN 102752068A CN 2012100465796 A CN2012100465796 A CN 2012100465796A CN 201210046579 A CN201210046579 A CN 201210046579A CN 102752068 A CN102752068 A CN 102752068A
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Abstract
The present invention provides a communication system, a transmitting apparatus, a receiving apparatus and a communication method. In a broad frequency band audio communication system, the audio level of the audio leakage output from a receiving apparatus can be reduced, thereby increasing the communication privacy. The communication system is formed by a microphone apparatus (1) as a transmitting apparatus and a loudspeaker apparatus (15) as a receiving apparatus; when road frequency band audio signals are input, the microphone apparatus (1) performs balancing modulation processing enabling frequency anti-clockwise rotation of the audio signals, and in a frequency band lower than a reference frequency in the audio signals undergone frequency anti-clockwise rotation, DCS signals or motion signals are laminatedly transmitted; and when audio signals transmitted from the microphone apparatus (1) are received, the loudspeaker apparatus (15) reduces the signals in a frequency band lower than the reference frequency in the received audio signals, performs inverted balancing modulation processing enabling re-anticlockwise rotation of the frequency of the audio frequency signals, and outputs the audio signals after the re-anticlockwise rotation of frequency.
Description
Technical field
The present invention relates to receive and dispatch the communication system of wide band audio signal, particularly improve the technology of conversation privacy.
Background technology
In transceiver or the home-use cordless telephone etc., utilized transmitting-receiving only to comprise the audio band (communication system of the audio signal of the narrow-band of 300Hz～3kHz).In the past; Realize the private technology of conversing as the communication system of utilizing this narrow-band less expensively; Following method has been proposed: all be provided with balanced modulator at transmitter and receiver both sides; Send the audio signal after making the frequency counter-rotating in sender side, received audio frequency is reversed once more and restore (for example with reference to patent documentation 1 and patent documentation 2) at receiver-side.
According to this existing method, even the audio signal of sending from transmitter is received by other receivers (receiver that does not have balanced modulator), because the frequency of this audio signal is inverted, so also be difficult for listening to the content of audio frequency.In the past, in the communication system of narrow-band, guaranteed the conversation privacy like this.
The prior art document
Patent documentation
Patent documentation 1: japanese kokai publication hei 2-37852 communique
Patent documentation 2: japanese kokai publication hei 7-307721 communique
Yet communication system in the past owing to can only receive and dispatch only comprises audio band, and (audio signal of the narrow-band of 300Hz～3kHz) is so (the wide band situation of 100Hz～15kHz) is compared the problem that exists tonequality to reduce with comprising audio band.
So,, also consider the employed method of system's (communication system of narrow-band) in the past is applied directly in the wide band communication system in order to improve tonequality.But,, can't obtain the conversation privacy that can obtain by the communication system of narrow-band only through merely method in the past being applied to wide band communication system.Audio signal for balance modulation back (frequency counter-rotating back); The electrical characteristics that constitute the electronic unit of balanced modulator can depart from desirable symmetry because of its deviation made or variations in temperature etc., comprise former audio frequency (audio signal before the balance modulation) as " leakage audio frequency ".This " leakage audio frequency " is included in the lower frequency side (mainly being the audio band of 300Hz～3kHz) of the audio signal after the balance modulation.
The lower frequency side (low frequency side) of the audio signal after the balance modulation is corresponding with the high frequency side (high-frequency side) that balance is modulated preceding audio signal; But be mainly in input under the situation of audio frequency to microphone; Composition above the high frequency side of audio band in former audio frequency (balance modulation before audio signal) is few; Therefore, the composition of the lower frequency side of the audio signal after the balance modulation is also few.For this reason; Under the situation that the audio signal of sending from transmitter is received by other receivers (receiver that does not possess balanced modulator); The lower frequency side of the audio signal after the balance modulation, " leakage audio frequency " composition in addition is few, the result; " leakage audio frequency " becomes and listened to easily, and existence can't be guaranteed the private problem of conversing.
Summary of the invention
The present invention makes in order to solve above-mentioned prior art problems, also can reduce the communication system that the audio level of leaking audio frequency can improve the conversation privacy in even its purpose is to provide in wide band system (system of high tone quality).
Communication system of the present invention possess the frequency band that is used to send the regulation that is transfused to audio signal dispensing device and receive the receiving system of the above-mentioned audio signal of sending from this dispensing device; It is characterized in that; This communication system has following formation; Promptly; Above-mentioned dispensing device possesses: the audio frequency input part of the audio signal of input said frequencies frequency band; Make the audio signal frequency counter-rotating portion of height counter-rotating of the frequency of above-mentioned audio signal; Reduction by this audio signal frequency counter-rotating portion make in the audio signal after the said frequencies counter-rotating, the first filtering portion of the audio signal of the frequency band lower than the reference frequency of regulation, after reducing, in the action of Control on Communication between overlapping and above-mentioned dispensing device and the above-mentioned receiving system on the frequency band lower or above-mentioned dispensing device, control than said reference frequency by this first filtering portion relevant control signal signal overlap portion and sending overlap the sending part of audio signal of above-mentioned control signal; Above-mentioned receiving system possesses: receive from the acceptance division of the audio signal of above-mentioned dispensing device transmission; Extract the signal extraction portion of above-mentioned control signal from the received audio signal of this acceptance division; Reduce in the above-mentioned audio signal that receives, the second filtering portion of the signal of the frequency band lower than said reference frequency; The audio signal frequency that the converse commentaries on classics that the height of the frequency of the audio signal of having been undertaken reducing by this second filtering portion is reversed is once more handled once more counter-rotating portion and output said frequencies by the audio output part of the audio signal after the counter-rotating once more.
According to this formation; In dispensing device (for example microphone device); Make the balance modulation treatment of the frequency counter-rotating of audio signal, the frequency band (than the low frequency band of reference frequency) of the lower frequency side of the audio signal after the frequency counter-rotating is gone up overlapping DCS signal or actuating signal.Therefore; Even comprise under the situation of the preceding audio signal of frequency counter-rotating as " leakage audio frequency " in the audio signal after the frequency counter-rotating; The signal of its frequency band (frequency band of lower frequency side) is also acoustically being shielded by DCS signal or actuating signal, can make from the leakage audio frequency of general speaker unit (speaker unit beyond the present invention) output to be difficult for being heard.On the other hand, in speaker unit of the present invention, reduced the signal of its frequency band (frequency band of lower frequency side), the contrary balance modulation treatment that the frequency of audio signal is reversed once more, the audio signal after suitably output frequency reverses once more.Like this, in wide band system (system of high tone quality), the leakage audio frequency can be shielded, the conversation privacy can be improved.In addition; In the audio signal after the frequency counter-rotating; Reduce the signal of the frequency band of lower frequency side, guaranteed to be used for the frequency band of overlapping DCS signal or actuating signal, thereby; When overlapping DCS signal or actuating signal on the audio signal, can improve the signal to noise ratio (S/N) of DCS signal or actuating signal.
In addition; In communication system of the present invention, above-mentioned control signal can be the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
In addition, in communication system of the present invention, the said reference frequency can be about 3kHz.The said reference frequency for example can be 2.8kHz～3.2kHz.
In addition; In communication system of the present invention; Above-mentioned receiving system can possess: extract the extraction portion of above-mentioned DCS signal or above-mentioned actuating signal and whether export switching, or the handling part that carries out the afore mentioned rules action based on above-mentioned actuating signal of the above-mentioned audio signal that receives from above-mentioned dispensing device based on above-mentioned DCS signal from the above-mentioned audio signal that receives.
Constitute according to this, can whether export the switching (squelch control) of the audio signal that receives from dispensing device by receiving system based on the DCS signal.Or, can carry out the indicated compulsory exercise of dispensing device (volume adjustment or battery allowance demonstration etc.) by receiving system based on actuating signal.
Dispensing device of the present invention is the dispensing device in the communication system; This communication system possess the frequency band that is used to send the regulation that is transfused to audio signal dispensing device and receive the receiving system of the above-mentioned audio signal of sending from this dispensing device; In above-mentioned receiving system; When receiving from audio signal that above-mentioned dispensing device sends; After the control signal of having extracted regulation; Reduce in the above-mentioned received audio signal, the signal of the frequency band lower than the reference frequency of regulation; The converse commentaries on classics that the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed is once more handled; And the height of output said frequencies is characterized in that by the audio signal after reversing once more above-mentioned dispensing device possesses: the audio frequency input part of the audio signal of input said frequencies frequency band; Make the audio signal counter-rotating portion of height counter-rotating of the frequency of above-mentioned audio signal; Reduction by this audio signal frequency counter-rotating portion make in the audio signal after the said frequencies counter-rotating, the first filtering portion of the audio signal of the frequency band lower than said reference frequency, after reducing by this first filtering portion, the signal of overlapping conduct low frequency band than said reference frequency, with above-mentioned dispensing device and above-mentioned receiving system between the action of Control on Communication or above-mentioned dispensing device control relevant control signal signal overlap portion and sending overlap the sending part of audio signal of above-mentioned control signal.
According to this dispensing device, with above-mentioned same, also can in wide band system (system of high tone quality), shield and leak audio frequency, can improve the conversation privacy.
In above-mentioned dispensing device, above-mentioned control signal can be the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
Receiving system of the present invention is the receiving system in the communication system; This communication system possess the frequency band that is used to send the regulation that is transfused to audio signal dispensing device and receive the receiving system of the above-mentioned audio signal of sending from this dispensing device; In the dispensing device of above-mentioned communication system; When importing the audio signal of said frequencies frequency band; The audio signal frequency counter-rotating of height counter-rotating of the frequency of above-mentioned audio signal is handled; After the control signal of having extracted regulation, on the audio signal after the height of said frequencies is inverted, the signal of the frequency band that overlapping conduct is lower than the reference frequency of regulation with above-mentioned dispensing device and above-mentioned receiving system between Control on Communication or the relevant control signal of action control of above-mentioned dispensing device; Sending overlap the audio signal of above-mentioned control signal; It is characterized in that this receiving system possesses: receive the acceptance division of the audio signal of sending from above-mentioned dispensing device, reduce in the above-mentioned received audio signal, the filtering portion of the signal of the frequency band lower than said reference frequency; The audio signal that the converse commentaries on classics that the height of the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed is once more handled once more counter-rotating portion and output said frequencies by the audio output part of the audio signal after the counter-rotating once more.
According to this receiving system, with above-mentioned same, also can in wide band system (system of high tone quality), shield and leak audio frequency, can improve the conversation privacy.
In above-mentioned receiving system, above-mentioned control signal can be the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
Communication means of the present invention is used in the communication system; This communication system possess the frequency band that is used to send the regulation that is transfused to audio signal dispensing device and receive the receiving system of the above-mentioned audio signal of sending from this dispensing device; It is characterized in that; This communication means comprises following steps: utilize above-mentioned dispensing device, when input audio signal, make the height counter-rotating of the frequency of the above-mentioned audio signal that is transfused to; On the audio signal that said frequencies is inverted, overlapping conduct than the low frequency band of reference frequency of regulation, control relevant control signal with Control on Communication or the action of above-mentioned dispensing device between above-mentioned dispensing device and the above-mentioned receiving system; Sending overlap the audio signal of above-mentioned control signal; Utilize above-mentioned receiving system, when receiving, extract the control signal of regulation from audio signal that above-mentioned dispensing device sends; Be reduced in the above-mentioned audio signal that receives, the signal of the frequency band lower than said reference frequency; The height of the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed once more; The output said frequencies is by the audio signal after reversing once more.
According to this communication means, with above-mentioned same, also can in wide band system (system of high tone quality), shield and leak audio frequency, can improve the conversation privacy.
In above-mentioned communication means, above-mentioned control signal can be the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
The invention effect
The present invention can provide the communication system with following effect: can in wide band system (system of high tone quality), reduce from the audio level of the leakage audio frequency of receiving system output, thereby can improve the conversation privacy.
Description of drawings
Fig. 1 is the block diagram of formation of the dispensing device (microphone device) of expression execution mode of the present invention.
Fig. 2 is the block diagram of formation of the receiving system (speaker unit) of expression execution mode of the present invention.
Fig. 3 is the key diagram of action of the dispensing device (microphone device) of execution mode of the present invention.
Fig. 4 is the key diagram of action of the receiving system (speaker unit) of execution mode of the present invention.
Embodiment
Below, utilize accompanying drawing that the communication system of execution mode of the present invention is described.In this execution mode, illustrative is the situation that is used for the communication system of wireless microphone system etc.The communication system of this execution mode constitutes by having as the microphone device of the function of dispensing device and the speaker unit that has as the function of receiving system.In this communication system, the audio signal of transmitting-receiving broadband (audio band of 100Hz～15kHz).In addition, in following explanation, with as wide band audio signal (situation of 100Hz～15kHz) is that example describes, even but do not have the situation of lower limit (～can implement too under 15kHz).
The formation of the communication system of execution mode of the present invention at first, is described with reference to Fig. 1 and Fig. 2.Fig. 1 is the block diagram of formation of dispensing device (microphone device) of the communication system of this execution mode of expression.As shown in Figure 1, microphone device 1 possesses: the microphone 2 of input audio signal; The AF amplifier 3 that the audio signal of being imported is amplified; Reduce the band pass filter (BPF) 4 of the noise accent rate composition that audio signal comprised; Make the balanced modulator 5 of processing (balance modulation treatment) of the frequency counter-rotating of audio signal; Reduction is than the high frequency content of the modulating clock pulse frequency in the balance modulation treatment and take out the low pass filter (LPF) 6 of the frequency counter-rotating composition of audio signal; Reduce reference frequency than regulation (about 3kHz for example, the preferably high pass filter of low frequency content (HPF) 7 of 2.8kHz～3.2kHz); Audio signal is carried out the FM modulator 8 of FM modulation; And amplify from the RF amplifier 10 of the audio signal of antenna 9 transmissions.At this, microphone 2 is equivalent to audio frequency input part of the present invention, and balanced modulator 5 is equivalent to audio signal frequency counter-rotating of the present invention portion.In addition, HPF7 is equivalent to the first filtering portion of dispensing device of the present invention, and antenna 9 is equivalent to sending part of the present invention.
In addition, microphone device 1 possesses: the tone signal oscillator 11 that makes the tone signal vibration that is sent out with audio signal; The DCS signal that generation is sent out with audio signal or the signal generation portion 12 of actuating signal.In addition, microphone device 1 possesses: the CPU13 that carries out the control of signal generation portion; Operate to carry out the operating portion 14 of compulsory exercise (volume adjustment etc.) by the user.Tone signal oscillator 11 overlaps the tone signal that is generated on the audio signal after balance is modulated.In addition, signal generation portion 12 overlaps the DCS signal that is generated or actuating signal (control signal) on the audio signal after the balance modulation (reduced by HPF7 the signal of the frequency band lower than reference frequency after audio signal).At this, signal generation portion 12 is equivalent to signal overlap of the present invention portion.
The DCS signal is to be used to carry out the signal based on the independent reception of digital coding noise elimination (DCS).The DCS signal is by being generated by the signal generation portion 12 of CPU13 control, overlapped audio signal after the balance modulation (reduced by HPF7 the signal of the frequency band lower than reference frequency after audio signal) and goes up and send to speaker unit 15.In speaker unit 15,, can carry out from the independent reception of the audio signal of microphone device 1 transmission based on this DCS signal.The frequency of DCS signal is configured to the frequency lower than the reference frequency of HPF7 (for example 254Hz).
In addition, actuating signal is to be used to carry out the signal by the compulsory exercise (the volume adjustment of loud speaker or the battery allowance demonstration of microphone etc.) of microphone device 1 indication.Actuating signal is through controlling signal generation portion 12 and generate by having received CPU13 from the input of operating portion 14 (perhaps battery allowance test section (not shown) etc.), overlapped audio signal after the balance modulation (reduced by HPF7 the signal of the frequency band lower than reference frequency after audio signal) and goes up and send to speaker unit 15.In speaker unit 15,, can carry out compulsory exercise according to the signal that sends from microphone device 1 based on this actuating signal.The frequency of actuating signal is configured to the frequency lower than the reference frequency of HPF7 (for example 254Hz).
Fig. 2 is the block diagram of formation of the receiving system (speaker unit 15) in the communication system of this execution mode of expression.As shown in Figure 2, speaker unit 15 possesses: the RF amplifier 17 that amplifies the audio signal that is received by antenna 16; The audio signal that receives is carried out the FM demodulator 18 of FM demodulation; Reduce the high pass filter (HPF) 19 of the frequency content lower than the reference frequency (for example 3kHz) of regulation; The low pass filter (LPF) 20 of the frequency content that reduction is higher than the modulating clock pulse frequency in the balance modulation treatment; Make the balanced modulator 21 of processing (balance modulation treatment) of the frequency counter-rotating of audio signal; Reduction is than reverse the once more low pass filter (LPF) 30 of composition of the high frequency content of the modulating clock pulse frequency in the balance modulation treatment and the frequency of taking out audio signal; Amplify the AF amplifier 22 of audio signal; Carry out the squelch control portion 23 that the noise elimination of the output/non-output of switched audio signal opens and closes; The volume control section 24 of control audio signal volume; The loud speaker 25 of output audio signal.At this, antenna 16 is equivalent to acceptance division of the present invention, and HPF19 is equivalent to the second filtering portion of receiving system of the present invention.In addition, loud speaker 25 is equivalent to audio output part of the present invention.
In addition, carry out the balance modulation treatment, the frequency of the audio signal that frequency has been inverted (by the reversed audio signal of frequency of the balanced modulator 5 of microphone device 1) is reversed once more by the balanced modulator 21 of this speaker unit 15.The balance modulation treatment of therefore, being undertaken by the balanced modulator 21 of speaker unit 15 also can be described as contrary balance modulation treatment.The balanced modulator 21 of this speaker unit 15 is equivalent to audio signal frequency of the present invention counter-rotating portion once more.
In addition, speaker unit 15 possesses: the noise noise elimination portion 26 of the noise noise elimination of the noise when being used to shield no signal (noise); Extract the signal extraction portion 27 of DCS signal or actuating signal from the audio signal of having carried out the FM demodulation; The DCS signal that transmission is extracted or the CPU28 of actuating signal.And this speaker unit 15 possesses the display part 29 of battery allowance of being used to show microphone device 1 etc.
The DCS signal that is extracted by signal extraction portion 27 is sent to squelch control portion 23 from CPU28, is used to carry out the independent reception based on the digital coding noise elimination.Promptly; Squelch control portion 23 is from audio signal extraction DCS signal the time; Open noise elimination and output audio signal (occasion that will carry out audio signal output is called that noise elimination is closed (OFF) or noise elimination is opened, the situation of not carrying out audio signal output is called noise elimination is opened (ON) or noise elimination is closed).On the other hand, squelch control portion 23 is when audio signal is extracted the DCS signal, closes noise elimination and output audio signal not.In this case, CPU28, squelch control portion 23 are equivalent to handling part of the present invention.
In addition, the actuating signal of being extracted by signal extraction portion 27 is used in speaker unit 15, carry out exercises.For example, the actuating signal that is used to adjust volume is sent to volume control section 24 from CPU28, is used to carry out the control of volume adjustment.In addition, be used to show that the actuating signal of battery allowance is sent to display part 29 from CPU28, be used to carry out the demonstration of the battery allowance of microphone device 1.In addition, the exercises of in speaker unit 15, carrying out are not limited to the volume adjustment or battery allowance shows, for example also can be contact output etc.In this case, CPU28, volume control section 24 are equivalent to handling part of the present invention.
Fig. 3 is the key diagram of action of the microphone device 1 of this execution mode.As shown in Figure 3; In the microphone device 1 of this execution mode; (the wide band audio signal of 300Hz～3kHz) (with reference to Fig. 3 (a)) by from microphone 2 inputs the time makes the balance modulation treatment (with reference to Fig. 3 (b)) of the frequency counter-rotating of this audio signal when comprising the main audio frequency band.The part (part of audio band) of the lower frequency side of the audio signal after the balance modulation comprises the leakage audio frequency sometimes; But in this execution mode; The part of this lower frequency side (comprising the part of leaking audio frequency) reduces (with reference to Fig. 3 (c)) by HPF19; Replace, sending overlap the audio signal (with reference to Fig. 3 (d)) of DCS signal or actuating signal.
Fig. 4 is the key diagram of action of the speaker unit 15 of this execution mode.As shown in Figure 4; In the speaker unit 15 of this execution mode; When receiving from audio signal that microphone device 1 sends (with reference to Fig. 4 (a)), signal extraction portion 27 extracts DCS signals, actuating signal and tone signal (overlapping than on the high frequency band of audio band).Then; The part of the lower frequency side of this audio signal (part of overlapping DCS signal or actuating signal) is lowered (with reference to Fig. 4 (b)); Then; Make the balance modulation treatment (contrary balance modulation treatment) (with reference to Fig. 4 (c)) of the frequency counter-rotating (counter-rotating once more) of audio signal, exported as audio frequency from loud speaker 25.
According to the communication system of this such execution mode, in wide band system (system of high tone quality), can reduce from the audio level of the leakage audio frequency of speaker unit 15 outputs, can improve the conversation privacy.
Promptly; In this execution mode; In microphone device 1, make the balance modulation treatment of the frequency counter-rotating of audio signal, the frequency band (than the low frequency band of reference frequency) of the lower frequency side of the audio signal of (frequency counter-rotating back) is gone up overlapping DCS signal or actuating signal in balance modulation back.Therefore; Even before in the audio signal of balance modulation back (frequency counter-rotating back), comprising the balance modulation under the situation of the audio signal of (before the frequency counter-rotating) as " leakage audio frequency "; The signal of its frequency band (frequency band of lower frequency side) is also acoustically being shielded by DCS signal or actuating signal, can make from the leakage audio frequency of general speaker unit 15 (speaker unit 15 beyond the present invention) output to be difficult for being heard.On the other hand; In the speaker unit 15 of this execution mode; Reduced the signal of its frequency band (frequency band of lower frequency side), the contrary balance modulation treatment that the frequency of audio signal is reversed once more, the suitably audio signal of the contrary balance modulation of output back (frequency reverse once more back).Like this, in wide band system (system of high tone quality), the leakage audio frequency can be shielded, the conversation privacy can be improved.
In addition, in this execution mode, in the audio signal of balance modulation back (frequency counter-rotating back), reduce the signal of the frequency band of lower frequency side, guaranteed to be used for the frequency band of overlapping DCS signal or actuating signal.Therefore, when overlapping DCS signal or actuating signal on the audio signal, can improve the signal to noise ratio (S/N) of DCS signal or actuating signal.
In addition, in this execution mode, can be based on the DCS signal, whether export the switching (squelch control) of the audio signal that receives from microphone device 1 by speaker unit 15.Or, can be based on actuating signal, carry out the indicated compulsory exercise (volume adjustment or battery allowance demonstration etc.) of microphone device 1 by speaker unit 15.
More than through having illustrated execution mode of the present invention, but scope of the present invention is not limited to this, in the scope that claims are put down in writing, can change according to purpose/be out of shape.
Industrial applicibility
As previously discussed; Communication system involved in the present invention have in wide band system (system of high tone quality) thus in can reduce from the audio level of the leakage audio frequency of receiving system output and can improve the private effect of conversing, be useful as wireless microphone system etc.
Claims (10)
1. communication system, this communication system possesses: the dispensing device that is used to send the audio signal of the assigned frequency frequency band that is transfused to; With the receiving system of reception from the above-mentioned audio signal of this dispensing device transmission; It is characterized in that,
Above-mentioned dispensing device possesses:
The audio frequency input part of the audio signal of input said frequencies frequency band;
Make the audio signal frequency counter-rotating portion of height counter-rotating of the frequency of above-mentioned audio signal;
Reduction by this audio signal frequency counter-rotating portion make in the audio signal after the said frequencies counter-rotating, the first filtering portion of the audio signal of the frequency band lower than the reference frequency of regulation;
After reducing, in the action of Control on Communication between overlapping and above-mentioned dispensing device and the above-mentioned receiving system on the frequency band lower or above-mentioned dispensing device, control the signal overlap portion of relevant control signal than said reference frequency by this first filtering portion; With
Sending overlap the sending part of audio signal of above-mentioned control signal;
Above-mentioned receiving system possesses:
Reception is from the acceptance division of the audio signal of above-mentioned dispensing device transmission;
Extract the signal extraction portion of above-mentioned control signal from the received audio signal of this acceptance division;
Reduce in the above-mentioned audio signal that receives, the second filtering portion of the signal of the frequency band lower than said reference frequency;
The audio signal frequency that the converse commentaries on classics that the height of the frequency of the audio signal after being reduced by this second filtering portion is reversed is once more handled is counter-rotating portion once more; With
The output said frequencies is by the audio output part of the audio signal after reversing once more.
2. the communication system of putting down in writing like claim 1; It is characterized in that above-mentioned control signal is the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
3. the communication system of putting down in writing like claim 1 is characterized in that, the said reference frequency is approximately 3kHz.
4. the communication system of putting down in writing like claim 2 is characterized in that, above-mentioned receiving system possesses:
Extract the extraction portion of above-mentioned DCS signal or above-mentioned actuating signal from the above-mentioned audio signal that receives; With
Whether export switching, or the handling part that carries out the afore mentioned rules action based on above-mentioned actuating signal of the above-mentioned audio signal that receives from above-mentioned dispensing device based on above-mentioned DCS signal.
5. dispensing device; This dispensing device is the dispensing device in the communication system; Dispensing device that this communication system possesses the audio signal that is used to send the assigned frequency frequency band that is transfused to and the receiving system that receives the above-mentioned audio signal of sending from this dispensing device are in above-mentioned receiving system, when receiving from audio signal that above-mentioned dispensing device sends; After the control signal of having extracted regulation; Reduce the signal of frequency band lower than the reference frequency of regulation in the above-mentioned received audio signal, the converse commentaries on classics that the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed is once more handled, and the height of output said frequencies is by the audio signal after the counter-rotating once more; Above-mentioned dispensing device is characterised in that
Above-mentioned dispensing device possesses:
The audio frequency input part of the audio signal of input said frequencies frequency band;
Make the audio signal counter-rotating portion of height counter-rotating of the frequency of above-mentioned audio signal;
Reduction by this audio signal frequency counter-rotating portion make in the audio signal after the said frequencies counter-rotating, the first filtering portion of the audio signal of the frequency band lower than said reference frequency;
The signal overlap portion of the control signal signal of overlapping conduct low frequency band, relevant with the action control of Control on Communication or above-mentioned dispensing device between above-mentioned dispensing device and the above-mentioned receiving system after reducing than said reference frequency by this first filtering portion; With
Sending overlap the sending part of audio signal of above-mentioned control signal.
6. the dispensing device of putting down in writing like claim 5; It is characterized in that above-mentioned control signal is the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
7. receiving system; This receiving system is the receiving system in the communication system; This communication system possesses the dispensing device and the receiving system of reception from the above-mentioned audio signal of this dispensing device transmission of the audio signal that is used to send the assigned frequency frequency band that is transfused to; In the dispensing device of above-mentioned communication system; When the audio signal of input said frequencies frequency band, the audio signal frequency counter-rotating of height counter-rotating of the frequency of above-mentioned audio signal is handled, after the control signal of having extracted regulation; On the audio signal after the height of said frequencies is inverted overlapping conduct than the signal of the low frequency band of reference frequency of regulation, control relevant control signal with Control on Communication or the action of above-mentioned dispensing device between above-mentioned dispensing device and the above-mentioned receiving system; Sending overlap the audio signal of above-mentioned control signal, above-mentioned receiving system is characterised in that
This receiving system possesses:
Reception is from the acceptance division of the audio signal of above-mentioned dispensing device transmission;
Reduce in the above-mentioned received audio signal, the filtering portion of the signal of the frequency band lower than said reference frequency;
The audio signal that the converse commentaries on classics that the height of the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed is once more handled is counter-rotating portion once more; With
The output said frequencies is by the audio output part of the audio signal after reversing once more.
8. the receiving system of putting down in writing like claim 7; It is characterized in that above-mentioned control signal is the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
9. communication means; This communication means is used in the communication system; This communication system possesses the dispensing device and the receiving system of reception from the above-mentioned audio signal of this dispensing device transmission of the audio signal that is used to send the assigned frequency frequency band that is transfused to; It is characterized in that this communication means may further comprise the steps:
Utilize above-mentioned dispensing device, when input audio signal, make the height counter-rotating of the frequency of the above-mentioned audio signal of being imported;
On the audio signal after said frequencies is inverted, overlapping conduct than the low frequency band of reference frequency of regulation, control relevant control signal with Control on Communication or the action of above-mentioned dispensing device between above-mentioned dispensing device and the above-mentioned receiving system;
Sending overlap the audio signal of above-mentioned control signal;
Utilize above-mentioned receiving system, when receiving, extract the control signal of regulation from audio signal that above-mentioned dispensing device sends;
Reduce in the above-mentioned audio signal that receives, the signal of the frequency band lower than said reference frequency;
The height of the frequency of the audio signal behind the signal that has reduced the frequency band lower than said reference frequency is reversed once more; And
The output said frequencies is by the audio signal after reversing once more.
10. the communication means of putting down in writing like claim 9; It is characterized in that above-mentioned control signal is the DCS signal that is used to supply the independent reception of the above-mentioned audio signal that above-mentioned receiving system carries out sending from above-mentioned dispensing device, or be used to supply above-mentioned receiving system to carry out the actuating signal of compulsory exercise.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011-095794 | 2011-04-22 | ||
| JP2011095794A JP5269940B2 (en) | 2011-04-22 | 2011-04-22 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102752068A true CN102752068A (en) | 2012-10-24 |
| CN102752068B CN102752068B (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210046579.6A Expired - Fee Related CN102752068B (en) | 2011-04-22 | 2012-02-27 | Communication system, dispensing device, reception device and communication means |
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| Country | Link |
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| JP (1) | JP5269940B2 (en) |
| CN (1) | CN102752068B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328153A (en) * | 2016-08-24 | 2017-01-11 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105635493A (en) * | 2015-09-28 | 2016-06-01 | 宇龙计算机通信科技(深圳)有限公司 | Voice shielding method, voice shielding device and terminal |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2530101A1 (en) * | 1982-07-06 | 1984-01-13 | Thomson Brandt | Process and system for encrypted transmission of a signal, especially of audio frequency |
| JPH0237852A (en) * | 1988-07-27 | 1990-02-07 | Nec Corp | Voice secret call device |
| JPH02162932A (en) * | 1988-12-16 | 1990-06-22 | Sony Corp | Transmitter-receiver |
| CN1143287A (en) * | 1994-05-03 | 1997-02-19 | 摩托罗拉公司 | Frequency inverted scrambler containing integrated high-pass filter |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04150427A (en) * | 1990-10-12 | 1992-05-22 | Sony Corp | Privacy telephone device for radio communication equipment |
| JPH08274753A (en) * | 1995-04-03 | 1996-10-18 | Sony Corp | Secret talk method, and transmitter and receiver |
| JP4617276B2 (en) * | 2006-06-14 | 2011-01-19 | 株式会社日立国際電気 | Transmitter |
| JP2009246430A (en) * | 2008-03-28 | 2009-10-22 | Kenwood Corp | Radio communication device and method of processing radio communication device |
| JP5331091B2 (en) * | 2010-11-18 | 2013-10-30 | パナソニック株式会社 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD |
| JP5350351B2 (en) * | 2010-11-18 | 2013-11-27 | パナソニック株式会社 | COMMUNICATION SYSTEM, TRANSMISSION DEVICE, RECEPTION DEVICE, AND COMMUNICATION METHOD |
-
2011
- 2011-04-22 JP JP2011095794A patent/JP5269940B2/en not_active Expired - Fee Related
-
2012
- 2012-02-27 CN CN201210046579.6A patent/CN102752068B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2530101A1 (en) * | 1982-07-06 | 1984-01-13 | Thomson Brandt | Process and system for encrypted transmission of a signal, especially of audio frequency |
| JPH0237852A (en) * | 1988-07-27 | 1990-02-07 | Nec Corp | Voice secret call device |
| JPH02162932A (en) * | 1988-12-16 | 1990-06-22 | Sony Corp | Transmitter-receiver |
| CN1143287A (en) * | 1994-05-03 | 1997-02-19 | 摩托罗拉公司 | Frequency inverted scrambler containing integrated high-pass filter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328153A (en) * | 2016-08-24 | 2017-01-11 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
| CN106328153B (en) * | 2016-08-24 | 2020-05-08 | 青岛歌尔声学科技有限公司 | Electronic communication equipment voice signal processing system and method and electronic communication equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012227856A (en) | 2012-11-15 |
| JP5269940B2 (en) | 2013-08-21 |
| CN102752068B (en) | 2016-09-28 |
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