JP4705646B2 - Wireless microphone transmitter, wireless receiver, wireless microphone system, control transmission method in wireless microphone transmitter, control reception method in wireless receiver, and control transmission method in wireless microphone system - Google Patents

Description

  The present invention enables a flexible and smooth system transition such as partial replacement and mixed use by hybridizing both the analog tone control method and the digital control method in the wireless microphone technology.

  Conventionally, a wireless microphone system that combines a transmitter and a receiver of a wireless microphone has been used. As a typical application field, there is an example in which station broadcasting is performed from a transmitter carried by a train station staff or a conductor. In such a wireless microphone system, several types of control signals can be transmitted to the receiver in response to the operation of a control switch such as a button provided on the transmitter. Examples of the control content include transmitting to the receiver side that the audio is being transmitted and broadcasting, specifying the broadcast target range (1st line, 2nd line, etc.), ringing the departure bell, and transmitting a confirmation signal.

  The mode of technology for transmitting such a control signal from the transmitter to the receiver can be broadly divided into an analog tone control system (see, for example, Patent Document 1) and a digital control system. The analog tone control method has been used for a long time, and an analog tone having a frequency (for example, 67 Hz to 123.0 Hz) according to which one of the control switches F1 to F5 is operated in the transmitter illustrated in FIG. A transmission signal on which the control signal is superimposed is transmitted, and in the receiver as illustrated in FIG. 6, the superimposed tone control signal is detected and reflected on the control output by the CPU.

  In such an analog tone control method, the receiver reproduces the sound by cutting the frequency band to which the tone control signal belongs with an HPF (high pass filter), and thus has a sound quality limitation such as sound distortion.

On the other hand, in the digital control method adopted in recent years, in the transmitter as illustrated in FIG. 7, the control content corresponding to the operated control switch is represented by control data of a predetermined bit rate (for example, 2400 bps), The transmission contents are temporarily switched to control data by the switch circuit, and in the receiver as illustrated in FIG. 8, the control data as described above is detected by, for example, the FSK demodulating circuit and reflected on the control output by the CPU.
JP-A-6-113376

  However, the transmitter and the receiver in the conventional wireless microphone system are dedicated devices specialized for only one of the functions of the analog tone control method or the digital control method described above, and change from the analog tone control method to the digital control method. When trying to migrate the system, the transmitter and the receiver cannot be replaced part by part and cannot be updated or mixed, and there is a problem that the system transition is likely to be a barrier due to budget, operation, or other reasons.

  The present invention solves the above-mentioned problems, and its purpose is to make the wireless microphone technology flexible and smooth, such as partial replacement and mixed use, by hybridization corresponding to both the analog tone control method and the digital control method. System migration is possible.

In order to achieve the above object, according to one aspect of the present invention (claims 1 and 4), in a wireless microphone transmitter (or a control transmission method in the wireless microphone transmitter of the above aspect), a given sound is converted into a sound signal. Audio input means, a switching unit that accepts a selection operation of using an analog tone control method or a digital control method, a control switch that accepts a control operation to be transmitted by a wireless signal, and a voice signal to be transmitted First switch means for inserting or bypassing a high-pass filter for the transmission path from the audio input means, second switch means for selecting the audio signal or digital control data as transmission contents, and an analog tone to be given Mixer means for superimposing a control signal on the audio signal; Using a modulation transmission means for transmitting modulating the transmissions selected by the serial second switch means as a predetermined wireless signal, and a control unit which controls the respective units, wherein the control unit, 1. When the control switch is operated in a state where the analog tone control method is selected by the switching unit, (1) by controlling the first switch unit, the audio signal from the audio input unit is controlled. Inserting the high-pass filter for the transmission path, (2) selecting the audio signal as the transmission content by controlling the second switch means, and (3) depending on the content of the operation on the control switch 1. An analog tone control signal having a predetermined frequency is generated and given to the mixer means, and (4) the analog tone control signal given to the mixer means is superimposed on the low frequency band cut by the high pass filter. When the control switch is operated with the digital control method selected by the switching unit, (1) by controlling the first switch means, the audio signal from the audio input means is controlled. By bypassing the high-pass filter for the transmission path, (2) generating digital control data of a predetermined content according to the content of operation on the control switch, and (3) controlling the second switch means, The transmission content is switched to the digital control data, and (4) the switched digital control data is FSK modulated .

  Note that the transmission content to be modulated and transmitted in the case of the analog tone control method is not only a voice signal but also a voice signal on which the analog tone control signal is superimposed is transmitted when the control content is transmitted.

According to another aspect of the present invention (claims 2 and 5) , in a wireless receiver (or a control reception method in the wireless receiver of the above aspect), reception demodulation means for receiving a predetermined wireless signal and demodulating the reception signal; An audio output means for converting a voice signal demodulated as a reception signal into a voice and outputting it; a tone detection means for detecting a superimposed analog tone control signal from the voice signal given as the reception signal; Data extraction means for extracting digital control data from the signal; first switch means for providing the demodulated reception signal to the tone detection means or the data extraction means; and the audio output using the demodulated reception signal as an audio signal. A second switch for inserting or bypassing a high-pass filter for the path to the means Means, a control output means for outputting the contents of the control received by the wireless signal to the outside, and a control section for controlling each section. The control section uses an analog tone control method for the demodulated received signal. And whether a digital control method is used, and When the analog tone control method is determined, (1) the first switch means is controlled to provide the received sound signal to the tone detecting means, and (2) the tone is generated from the sound signal. When the detecting means detects the analog tone signal, the control output means outputs the contents of the control according to the frequency of the detected analog tone control signal to the outside, and (3) the second switch means is controlled. The high-pass filter is inserted in the path for transmitting the demodulated received signal as an audio signal to the audio output means, and (4) the superimposed analog tone control signal is an audio control tone for audio transmission according to its frequency In the case of an external control tone that outputs audio from the audio output means and represents other control contents, it responds to the control contents. It was subjected to an external output, 2. If the digital control method is determined, (1) the first switch means is controlled to provide the received signal to the data extracting means, and (2) the data extracting means is digitally controlled from the received signal. When extracting the control data, the control output means outputs the contents of the control represented by the extracted digital control data to the outside, and (3) the received signal is controlled by controlling the second switch means. Bypassing the high-pass filter for a path to be transmitted to the audio output means as an audio signal, (4) FSK demodulating the digital control data obtained from the received signal, and in the case of audio control data for audio transmission, from the audio output means In the case of external control data that performs voice output and represents other control contents, external output is performed .

Another aspect of the present invention (Claims 3 and 6) is a wireless microphone system (control transmission method), and the wireless microphone transmitter (control transmission method) of any of the above aspects, The wireless receiver according to the aspect (the control reception method) is combined.

  According to the present invention as described above, by providing at least one of a hybrid transmitter and receiver compatible with both analog and digital control systems, partial replacement with conventional analog and digital transceivers, etc. Flexible system migration is possible.

  That is, on the hybrid transmitter side of the present invention, an analog or digital control system can be selected in accordance with the receiver in the usage environment, a high-pass filter and an analog tone control signal are applied for analog, and digital control data is applied for digital. The high pass filter is not applied. Therefore, regardless of whether the receiver in the usage environment is a conventional analog or digital receiver or a hybrid receiver according to the present invention, a flexible and smooth system transfer such as partial replacement or mixed use is possible.

  Further, the hybrid receiver side of the present invention determines whether the control method of the received signal is analog or digital. If analog, the analog tone control signal is detected and the frequency band is removed by applying a high-pass filter. Sound quality is also improved because digital control data is interpreted and no high-pass filter is applied. With such a receiver, regardless of whether each transmitter at the transmission source is a conventional analog, digital, or hybrid transmitter of the present invention, a flexible and smooth system transition such as partial replacement and mixed use can be achieved. It becomes possible.

The figure which shows the structural example of the wireless microphone transmitter in embodiment of this invention. The figure which shows the structural example of the wireless receiver in embodiment of this invention. The figure which shows the other structural example of the wireless receiver in embodiment of this invention. The flowchart which illustrates operation | movement of the wireless receiver in embodiment of this invention. The figure which shows the structural example of the wireless microphone transmitter by the conventional analog tone control system. The figure which shows the structural example of the wireless receiver by the conventional analog tone control system. The figure which shows the structural example of the wireless microphone transmitter by the conventional digital control system. The figure which shows the structural example of the wireless receiver by the conventional digital control system.

Explanation of symbols

F1 to F5 ... control switches SW1 to SW4 ... switch circuit 101 ... microphone 102 ... microphone amplifier 103 ... compander 104 ... transmitter setting unit 105, 205 ... HPF (high pass filter)
106, 206 ... CPU
107 ... MIX (mixer part)
108 ... VCO (Voltage Controlled Oscillator)
109, 201 ... Rf amplifier 202 ... Mixer 203 ... Demodulator 208 ... Expander 209 ... Audio amplifier 231 ... Selection circuit 211 ... Tone detection circuit 212 ... FSK demodulation circuit 221 ... Control output circuit

  Next, the best embodiment of the present invention will be described with reference to the drawings. Note that the same preconditions as those already described in the background art and issues are not repeated.

  In the present embodiment, a wireless microphone transmitter (hereinafter also referred to as “this transmitter”) configured as shown in FIG. 1 and a wireless receiver (hereinafter also referred to as “this receiver”) configured as shown in FIG. It relates to a wireless microphone system (hereinafter “this system”) that combines these, and can be grasped as a method corresponding to each of this transmitter, this receiver, and this system.

[1. (Overview)
As an outline, this transmitter (FIG. 1) accepts an analog tone control method or a digital control method selection and a control content to be transmitted by a switch operation based on control by a CPU as a control unit. In a state where the control method is selected, an analog tone control signal having a frequency corresponding to the control content is superimposed on the audio signal that has passed through the high-pass filter and modulated, and in a state where the digital control method is selected. The audio signal bypasses the high-pass filter and modulates and transmits digital control data representing the control content.

  Correspondingly, in this receiver (FIG. 2), the analog tone control method or the digital control method is discriminated for the received signal demodulated based on the control by the CPU as the control unit, and the received signal of the analog tone control method is determined. Detects the analog tone control signal, acquires the control content from its frequency, and passes it through the high-pass filter as the audio signal to be reproduced. For the received signal of the digital control method, the digital control data is extracted and the digital pattern is extracted. The control content is acquired from the above and the high-pass filter is bypassed for the audio signal to be reproduced.

[2. Constitution〕
Next, specific configurations of the transmitter and the receiver are shown. The present embodiment is an example in which audio is analogly transmitted even when control is transmitted digitally.
[2-1. Configuration of this transmitter
FIG. 1 is a schematic circuit diagram showing the configuration of the transmitter. That is, the microphone 101, the microphone amplifier 102, and the compander 103 for compression processing are audio input means for converting a given sound into a sound signal. The transmitter setting unit 104 is a switching unit that accepts a selection operation of using an analog tone control method or a digital control method, and uses, for example, a slide switch. The control switches F1 to F5 are control switches that receive a control operation to be transmitted with a wireless signal. For example, a plurality of push buttons having different colors and shapes are used.

  The switch circuit SW1 is first switch means for inserting or bypassing the high-pass filter (HPF) 105 in the transmission path of the audio signal to be transmitted. The switch circuit SW2 is a second switch unit that selects the audio signal that has passed through the HPF 105 or digital control data from the CPU 106 as transmission contents.

  A mixer unit (MIX) 107 is a mixer unit that superimposes an analog tone control signal supplied from the CPU 106 on the audio signal. A voltage-controlled oscillator (VCO) 108 and an Rf amplifier (Rf AMP) 109 ahead of the mixer unit (MIX) 107 Modulation transmission means for FM-modulating the transmission content selected by the switch circuit SW2 and transmitting it as a predetermined wireless signal. The CPU 106 is a control unit that controls each unit.

[2-2. (Configuration of this receiver)
FIG. 2 is a schematic circuit diagram showing the configuration of the receiver. That is, the Rf amplifier 201 (201A, 201B), the mixer 202 (202A, 202B), and the demodulation unit 203 (203A, 203B) are reception demodulation means for receiving a predetermined wireless signal and demodulating the reception signal. The expander 208 and the audio amplifier 209 are audio output means for converting a sound signal demodulated as a received signal into sound and outputting the sound.

  The tone detection circuit 211 is tone detection means for detecting a superimposed analog tone control signal from an audio signal given as a reception signal. An FSK (Frequency Shift Keying) demodulating circuit 212 is data extracting means for extracting digital control data from the received signal demodulated by the demodulating unit 203.

  The switch circuit SW3 is a first switch unit that provides the reception signal demodulated by the demodulator 203 to the tone detection circuit 211 or the FSK demodulation circuit 212. The switch circuit SW4 is second switch means for inserting or bypassing the high-pass filter (HPF) 205 in the path for transmitting the reception signal demodulated by the demodulation unit 203 to the expander 208 as an audio signal.

  The control output circuit 221 is a control output unit that outputs the content of control received by a wireless signal to the outside, and the CPU 206 is a control unit that controls each unit.

  2 shows a general diversity configuration in which the antennas A and B are switched by the selection circuit 231 depending on the reception state. However, this is not the essence of the present invention, and the diversity configuration is illustrated in FIG. Therefore, the description may be omitted.

[3. Action)
The present embodiment configured as described above operates as follows.
[3-1. (Processing at transmitter)
First, in this transmitter (FIG. 1), the following control by the CPU 106 is the center.

[3-1-1. (Analog)
That is, when any one of the control switches F1 to F5 is operated while the analog tone control method is selected by the transmitter setting unit 104, the CPU 106
(1) By controlling the switch circuit SW1, the HPF 105 is inserted into the transmission path of the audio signal from the compander 103, and
(2) The audio signal is selected as the transmission content by controlling the switch circuit SW2,
(3) An analog tone control signal having a predetermined frequency (for example, 67 Hz to 123.0 Hz) corresponding to the content of the operation with the control switches F1 to F5 is generated by an appropriate conversion interface circuit (not shown) and also to the mixer unit 107. give.

  As a result, an analog tone control signal having a frequency corresponding to the control content of the control switches F1 to F5 is superimposed on the low frequency region cut by the HPF 105 in the audio signal, and modulated by the VCO 108 and the Rf amplifier 109, and FM. Transmit as a wireless signal. The transmission pattern of such control contents is arbitrary, but for example, the control content is continuously superimposed and transmitted while the button as the control switch is pressed.

[3-1-2. (Digital)
On the other hand, when any of the control switches F1 to F5 is operated with the digital control method selected by the transmitter setting unit 104, the CPU 106
(1) By controlling the switch circuit SW1, the HPF 105 is bypassed with respect to the transmission path of the audio signal from the audio input means;
(2) Generate digital control data having a predetermined content according to the content of the operation with the control switches F1 to F5,
(3) The transmission content is switched to the digital control data by controlling the switch circuit SW2.

  As a result, the control contents of the control switches F1 to F5 are transmitted as digital control data by FSK modulation or the like, so that the audio signal transmitted at the same time or before and after can bypass the high-pass filter and improve the sound quality. . The transmission pattern of the control content in the case of the digital control method is also free, but for example, it is transmitted only at the moment when the button as the control switch is pressed, transmitted at the beginning of audio transmission, or the button is pressed. While being continued, the control operation such as ringing of the bell on the receiving side is continued by repeatedly transmitting at a predetermined time interval.

[3-2. (Processing at the receiver)
In this receiver (FIG. 2), the CPU 206 determines whether the analog tone control method or the digital control method is used from the frequency or waveform pattern of the received signal demodulated by the demodulator 203, and the like. If the analog tone control method is determined,
(1) By controlling the switch circuit SW3, an audio signal which is a reception signal is provided to the tone detection circuit 211,
(2) When the tone detection circuit 211 detects an analog tone signal from the audio signal, the control output circuit 221 outputs the contents of the control (C1 to C5) according to the detected frequency of the analog tone control signal to the outside. ,
(3) By controlling the switch circuit SW4, the HPF 205 is inserted in the path for transmitting the demodulated received signal as an audio signal to the expander 208.

On the other hand, if the CPU 206 determines that the digital control method is used,
(1) The received signal is provided to the FSK demodulating circuit 212 by controlling the switch circuit SW3.
(2) When the FSK demodulation circuit 212 extracts digital control data from the received signal, the control output circuit 221 outputs the contents of the control (C1 to C5) represented by the extracted digital control data to the outside.
(3) By controlling the switch circuit SW4, the HPF 205 is bypassed for the path for transmitting the received signal as an audio signal to the expander 208.

  In this way, the receiver side determines the control method for each received wireless signal, and if it is analog, it detects the tone from the audio signal and cuts the low frequency range with a high-pass filter to reproduce the audio. Digital control data is acquired by FSK modulation or the like, and the quality of sound can be improved since analog transmission sound does not require a high-pass filter.

[3-3. Example of processing procedure)
An example of the processing procedure of the above reception by the receiver is shown in the flowchart of FIG. That is, in this processing procedure, the CPU 206 performs data analysis such as the ID check of the stolen terminal (step S02) on the received signal received and demodulated by the reception demodulating means such as the Rf amplifier 201 (step S02) and determines whether the control method is analog or digital. It discriminate | determines (step S03).

  When the determination result is analog, the CPU 206 confirms the main tone (subcarrier of a predetermined frequency such as 14.85 kHz) representing information transmission (step S11), and the analog tone control signal superimposed on the main tone is determined by the frequency. If it is a voice control tone for voice transmission (step S12), voice is output from the audio output means accordingly (step S13), and if it is an external control tone representing other control contents (step S14), depending on the control contents External output is performed from the control output circuit 221. When the CPU 206 determines the end of reception based on the end of the main tone (step S16), the CPU 206 performs a reception end process such as returning to the standby state (step S17).

  If the determination result is digital, the CPU 206 confirms the main tone with the tone detection circuit 211 (step S21), and if the digital control data obtained from the received signal is audio control data for audio transmission (step S22), the CPU 206 follows it. Audio output is performed from the audio output means (step S23), and if it is external control data representing other control content (step S24), external output corresponding to the control content is performed from the control output circuit 221. In the case of detection of reception end due to the end of the main tone (step S26) or control data interpretation failure, the CPU 206 performs reception end processing such as return to the standby state (step S27).

  In the above processing procedure, in the case of analog, the voice control tone and the external control tone can be continued as a continuous low frequency. Therefore, even if the voice control tone or the external control tone ends once, before the main tone ends (step S16). ) Since the voice control tone and the external control tone may arrive again, the process returns to the detection of each tone (steps S11, S12, S14). On the other hand, in the present embodiment, in the case of digital, the voice control data and the external control data are transmitted at the beginning of the communication, so if the interpretation cannot be received normally, the reception is temporarily terminated (step S27).

[4. effect〕
According to the present embodiment described above, by providing a hybrid transmitter and receiver compatible with both analog and digital control systems, it is possible to flexibly replace a part of the conventional analog or digital transceiver, or to mix them. System migration is possible. It is to be noted that the effect of the present invention of flexible and smooth system transition can be obtained only by providing at least one of the transmitter and receiver.

  That is, on the hybrid transmitter side of the present invention, an analog or digital control system can be selected in accordance with the receiver in the usage environment, a high-pass filter and an analog tone control signal are applied for analog, and digital control data is applied for digital. The high pass filter is not applied. Therefore, regardless of whether the receiver in the usage environment is a conventional analog or digital receiver or a hybrid receiver according to the present invention, a flexible and smooth system transfer such as partial replacement or mixed use is possible.

  Further, the hybrid receiver side of the present invention determines whether the control method of the received signal is analog or digital. If analog, the analog tone control signal is detected and the frequency band is removed by applying a high-pass filter. Sound quality is also improved because digital control data is interpreted and no high-pass filter is applied. With such a receiver, regardless of whether each transmitter at the transmission source is a conventional analog, digital, or hybrid transmitter of the present invention, a flexible and smooth system transition such as partial replacement and mixed use can be achieved. It becomes possible.

[5. Other embodiments]
In addition, this invention is not limited to the said embodiment, The thing illustrated below and other embodiment other than that are included. For example, the configurations shown in FIGS. 1, 2 and 3 and the processing procedure shown in FIG.

Claims (6)

Audio input means for converting a given voice into a voice signal;
A switching unit that accepts a selection operation of using an analog tone control method or a digital control method;
A control switch for accepting a control operation to be transmitted by a wireless signal;
A first switch means for inserting or bypassing a high-pass filter for a transmission path of the audio signal to be transmitted from the audio input means;
Second switch means for selecting the audio signal or digital control data as transmission content;
Mixer means for superimposing a given analog tone control signal on the audio signal;
Modulation transmission means for modulating the transmission content selected by the second switch means and transmitting it as a predetermined wireless signal;
A control unit for controlling each unit;
Equipped with a,
The controller is
1. When the control switch is operated while the analog tone control method is selected by the switching unit,
(1) By controlling the first switch means, the high-pass filter is inserted for the transmission path of the audio signal from the audio input means ,
(2) by controlling said second switch means to select the audio signal as the transmission contents,
(3) Generate an analog tone control signal of a predetermined frequency according to the content of the operation with the control switch and give it to the mixer means ;
(4) Superimposing the analog tone control signal given to the mixer means on the low frequency cut by the high-pass filter,
2. When the control switch is operated with the digital control method selected by the switching unit,
(1) By controlling the first switch means, the high-pass filter is bypassed for the transmission path of the audio signal from the audio input means ,
(2) generating digital control data having a predetermined content corresponding to the content of the operation with the control switch ;
(3) By switching the second switch means, the transmission content is switched to the digital control data ,
( 4) A wireless microphone transmitter that performs FSK modulation on the switched digital control data . Receiving demodulation means for receiving a predetermined wireless signal and demodulating the received signal;
Audio output means for converting a voice signal demodulated as a received signal into a voice and outputting the voice;
Tone detection means for detecting a superimposed analog tone control signal from an audio signal given as a reception signal;
Data extraction means for extracting digital control data from the demodulated received signal;
First switch means for providing the demodulated received signal to the tone detection means or the data extraction means;
A second switch means for inserting or bypassing a high-pass filter for a path for transmitting the demodulated received signal as an audio signal to the audio output means;
Control output means for outputting the content of the control received by the wireless signal to the outside;
A control unit for controlling each unit;
Equipped with a,
The controller is
For demodulated received signal, determine whether analog tone control method or digital control method is used,
1. If it is determined that the analog tone control method,
(1) By controlling the first switch means, an audio signal as the received signal is provided to the tone detection means,
(2) When the tone detection unit detects an analog tone signal from the audio signal, the control output unit outputs the content of control according to the detected frequency of the analog tone control signal,
(3) Inserting the high-pass filter for a path for transmitting the demodulated received signal as an audio signal to the audio output means by controlling the second switch means,
(4) When the superimposed analog tone control signal is an audio control tone for audio transmission according to its frequency, audio is output from the audio output means, and when the external control tone represents other control content, the control content is According to the external output,
2. If it is determined that the digital control method,
(1) providing the received signal to the data extraction means by controlling the first switch means;
(2) When the data extraction means extracts the digital control data from the received signal, the control output means outputs the content of the control represented by the extracted digital control data to the outside,
(3) By controlling the second switch means, the high-pass filter is bypassed for a path for transmitting the received signal as an audio signal to the audio output means ,
(4) The digital control data obtained from the received signal is FSK demodulated. In the case of audio control data for audio transmission, audio output is performed from the audio output means. In the case of external control data representing other control contents, external output is performed. A wireless receiver characterized by performing . A wireless microphone transmitter according to claim 1 ;
A wireless receiver according to claim 2 ;
Wireless microphone system characterized by combining Audio input means for converting a given voice into a voice signal;
A switching unit that accepts a selection operation of using an analog tone control method or a digital control method;
A control switch for accepting a control operation to be transmitted by a wireless signal;
A first switch means for inserting or bypassing a high-pass filter for a transmission path of the audio signal to be transmitted from the audio input means;
Second switch means for selecting the audio signal or digital control data as transmission content;
Mixer means for superimposing a given analog tone control signal on the audio signal;
Modulation transmission means for modulating the transmission content selected by the second switch means and transmitting it as a predetermined wireless signal;
A control unit for controlling each unit;
Using,
The controller is
1. When the control switch is operated while the analog tone control method is selected by the switching unit,
(1) by controlling said first switch means, said high-pass filter was inserted for transmission path from the audio input means of said speech signal,
(2) selecting the audio signal as the transmission content by controlling the second switch means;
(3) Generate an analog tone control signal of a predetermined frequency according to the content of the operation with the control switch and give it to the mixer means;
(4) Superimposing the analog tone control signal given to the mixer means on the low frequency band cut by the high-pass filter,
2. When the control switch is operated with the digital control method selected by the switching unit,
(1) By controlling the first switch means, the high-pass filter is bypassed for the transmission path of the audio signal from the audio input means ,
(2) generating digital control data having a predetermined content corresponding to the content of the operation with the control switch;
(3) By switching the second switch means, the transmission content is switched to the digital control data ,
( 4) A control transmission method in a wireless microphone transmitter, wherein the switched digital control data is FSK modulated . Receiving demodulation means for receiving a predetermined wireless signal and demodulating the received signal;
Audio output means for converting a voice signal demodulated as a received signal into a voice and outputting the voice;
Tone detection means for detecting a superimposed analog tone control signal from an audio signal given as a reception signal;
Data extraction means for extracting digital control data from the demodulated received signal;
First switch means for providing the demodulated received signal to the tone detection means or the data extraction means;
A second switch means for inserting or bypassing a high-pass filter for a path for transmitting the demodulated received signal as an audio signal to the audio output means;
Control output means for outputting the content of the control received by the wireless signal to the outside;
A control unit for controlling each unit;
Using,
The controller is
For demodulated received signal, determine whether analog tone control method or digital control method is used,
1. If it is determined that the analog tone control method,
(1) By controlling the first switch means, an audio signal as the received signal is provided to the tone detection means,
(2) When the tone detection unit detects an analog tone signal from the audio signal, the control output unit outputs the content of control according to the detected frequency of the analog tone control signal,
(3) Inserting the high-pass filter for a path for transmitting the demodulated received signal as an audio signal to the audio output means by controlling the second switch means,
(4) When the superimposed analog tone control signal is an audio control tone for audio transmission according to its frequency, audio is output from the audio output means, and when the external control tone represents other control content, the control content is According to the external output,
2. If it is determined that the digital control method,
(1) providing the received signal to the data extraction means by controlling the first switch means;
(2) When the data extraction means extracts the digital control data from the received signal, the control output means outputs the content of the control represented by the extracted digital control data to the outside,
(3) By controlling the second switch means, the high-pass filter is bypassed for a path for transmitting the received signal as an audio signal to the audio output means ,
(4) The digital control data obtained from the received signal is FSK demodulated. In the case of audio control data for audio transmission, audio output is performed from the audio output means. In the case of external control data representing other control contents, external output is performed. how control receiver in a wireless receiver and performs. A control transmission method in the wireless microphone transmitter according to claim 4 ,
A control reception method in the wireless receiver according to claim 5 ;
A control transmission method in a wireless microphone system characterized by combining the above.

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