JPH08163040A - Infrared ray wireless microphone - Google Patents

Abstract

PURPOSE: To send a remote control signal used to adjust and operate a sound device of a receiver side form an infrared ray wireless microphone along with a voice signal. CONSTITUTION: An input key 30 such as a key matrix is provided in the infrared ray wireless microphone and a remote control signal is outputted from a microcomputer 32 by the operation of the input key 30 and a remote control signal carrier is pulse-modulated by the remote control signal. A changeover device 22 is placed in a prestage of an LED driver 24 and the changeover device 22 selects either of the voice carrier signal modulated by the voice signal and the remote control signal carrier signal modulated by the remote control signal. The microcomputer 32 controls the changeover device 22 to select the remote control signal carrier signal depending on the operation of the input key 30.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared wireless microphone in which a sound device on the receiver side can be operated by operating a key of the infrared wireless microphone.

[0002]

2. Description of the Related Art In a conventional karaoke apparatus for business use, an infrared wireless microphone transmits an audio signal using infrared rays, and an audio device on the receiver side reproduces the audio signal. These audio devices are provided with a key control function and a volume control function that can change the pitch of the accompaniment music, and these functions are performed by operating the keys of a separate remote control device. There is. By using a remote control device,
It is convenient because you can perform various operations while away from the audio device.

[0003]

In the above-mentioned conventional apparatus, a remote control device is required separately from the infrared wireless microphone, and the singer himself who has the infrared wireless microphone can change the pitch of the accompaniment music. When changing, both the infrared wireless microphone and the remote control device had to be operated, which made it difficult to operate. Further, although the sound signal and the remote signal are transmitted using infrared rays, they are provided separately, and the infrared emitting LED and the LED driver for driving the same are provided redundantly, which makes the entire apparatus expensive.

The present invention has been made in view of the conventional circumstances as described above, and an object thereof is to provide an infrared wireless microphone which is easy to operate and can be constructed at low cost.

[0005]

In order to achieve the above object, the infrared wireless microphone of the present invention responds to a voice carrier signal which is modulated by an electric signal output by converting a voice signal input to a microphone. In an infrared wireless microphone in which an infrared emitting LED is driven by an LED driver, a switch is provided in front of the LED driver, an input key, a microcomputer for outputting a remote control signal in response to operation of the input key, and A remote control signal carrier oscillator that oscillates a remote control signal carrier whose frequency is different from that of the sound carrier signal, and a remote control signal modulator that modulates the remote control signal carrier with the remote control signal are provided, and the switching unit modulates the remote control signal carrier according to the sound signal. Modulated according to the voice carrier signal and the remote control signal One of the remote control signal carrier signals is selected and added to the LED driver, and when the input key is operated, the switching unit is configured to select the remote control signal carrier signal under the control of the microcomputer. There is.

In addition, the infrared wireless microphone of the present invention is an infrared ray in which an infrared emitting LED is driven by an LED driver according to a sound carrier signal that is modulated by an electric signal that is converted and output from a sound signal input to a microphone. In the wireless microphone, a mixer is provided in front of the LED driver, an input key, a microcomputer that outputs a remote control signal in response to the operation of the input key, and a remote control signal carrier having a frequency different from that of the voice carrier signal are oscillated. A remote control signal carrier wave oscillator, and a remote control signal modulator that modulates the remote control signal carrier wave with the remote control signal, and according to the sound carrier wave signal modulated according to the sound signal by the mixer and the remote control signal. Mix the modulated remote control signal carrier signal It may be configured to apply to the ED driver.

[0007]

[Operation] In the infrared wireless microphone according to claim 1, originally, the infrared wireless microphone for transmitting the audio signal can be used to perform the adjustment operation of the acoustic device on the receiver side from a remote place. . The infrared light emitting LED and the LED driver, which are conventionally provided in the infrared wireless microphone and the remote control device, are shared.

Further, in the infrared wireless microphone according to the present invention, the infrared signal is obtained by mixing the voice carrier signal modulated according to the voice signal and the remote control signal carrier signal modulated according to the remote control signal. Light emitting LED
Is driven, the voice signal and the remote control signal can be simultaneously transmitted.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a block circuit diagram of an embodiment of the infrared wireless microphone of the present invention.

In FIG. 1, the infrared wireless microphone has the following structure. The audio signal input to the microphone 10 is converted into an electric signal and output, the electric signal is appropriately amplified by the low frequency amplifier 12, and further compressed by the modulation degree adjuster 14 so as not to cause overmodulation. It is provided to the modulator 16. The audio modulator 16 includes, for example, 2.06 MHz from the audio carrier oscillator 18.
A z or 2.56 MHz audio carrier is provided. The voice carrier oscillator 18 is configured so that these two frequencies can be easily switched. In the audio modulator 16, the audio carrier wave is, for example, FM-modulated by the audio signal converted into the electric signal. The modulated voice carrier signal is appropriately amplified by the high frequency amplifier 20, and the switching device 2
Given to 2. The output signal of the switch 22 is applied to the LED driver 24, and the infrared emitting LED 26 is driven according to the output signal. In the above description, the circuit configuration excluding the switch 22 is the same as that of the conventional infrared wireless microphone.

In addition to the above circuit configuration, the infrared wireless microphone of the present invention is provided with the following circuit members. That is, an input key 30 formed of a key matrix such as a numeric keypad for inputting a remote control signal is provided at an appropriate position on the outer peripheral wall of the infrared wireless microphone. Then, a microcomputer 32 that outputs a remote control signal in response to the operation of the input key 30, a remote control signal carrier oscillator 34 that oscillates a remote control signal carrier of a frequency different from an audio carrier, for example, 38 KHz, and a remote control signal by a digital code of the remote control signal. A remote control signal modulator 36 for pulse-modulating a carrier wave is built in the infrared wireless microphone.

The switch 22 is supplied with a sound carrier signal modulated according to the sound signal and a remote controller signal carrier signal modulated according to the remote controller signal, and one of them is selected to select the LED driver 24. Given to.
Then, the switch 22 is controlled so that the remote control signal carrier signal is selected by the signal output from the microcomputer 32 in response to the operation of the input key 30. When the output operation of the remote control signal is completed, the microcomputer 32 switches the selector 22 again to the selection of the sound carrier signal.

A light receiving device for receiving a signal of infrared rays emitted from the infrared wireless microphone is arranged at an appropriate place such as a wall. This light receiving device is similar to a conventional remote control device having an infrared wireless microphone separately, and includes, for example, a light receiver 40 and an audio carrier wave resonator 42, and an audio signal receiver for receiving an audio carrier wave signal. , A remote control signal receiving section including a light receiver 44 and a remote control signal carrier wave resonator 46 to receive a remote control signal carrier wave signal.

In such a configuration, when the input key 30 is not operated, the infrared light emission L is generated by the voice carrier signal modulated according to the voice signal input to the microphone 10.
The ED 26 is driven, similar to a conventional infrared wireless microphone. However, when the input key 30 is operated,
The switch 22 is controlled, and the infrared light emitting LED 26 is driven by the remote control signal carrier signal modulated by the remote control signal according to the operation of the input key 30. Then, in a state where the infrared light emitting LED 26 is driven by the sound carrier signal,
The audio signal is received by the audio signal light receiving unit of the light receiving device, and the sound is appropriately amplified. Further, when the infrared light emitting LED 26 is driven by the remote control signal carrier signal, the remote control signal receiving section of the light receiving device receives the sound, and the acoustic device is adjusted according to the remote control signal.

Therefore, as compared with the conventional device of this type, which additionally has a remote control device,
Operation by a singer etc. becomes easy. Moreover, the LED driver 24 and the infrared light emission L are different from those separately configured.
The ED 26 and the like can be shared, and the number of parts is reduced accordingly, so that the device as a whole can be manufactured inexpensively.

FIG. 2 is a block circuit diagram of another embodiment of the infrared wireless microphone of the present invention. In FIG.
The same circuit blocks as those in FIG.

The other embodiment shown in FIG. 2 is different from the embodiment shown in FIG. 1 in that instead of the switch 22, the mixer 50 is provided between the high frequency amplifier 20 and the LED driver 24.
Was intervened. The mixer 50 mixes a voice carrier signal modulated according to a voice signal and a remote control signal carrier signal modulated by a remote control signal to generate an L signal.
It is given to the ED driver 24. The mixer 50 is not controlled by the microcomputer 32 for switching.

In such a configuration, when only the voice signal is input, the infrared light emitting LED 26 is driven by a signal obtained by superimposing the unmodulated remote control signal carrier signal on the voice carrier signal modulated according to the voice signal. To be done. Further, when the input key 30 is operated without inputting the audio signal, the infrared light emitting LED 26 is driven by a signal in which the remote control signal carrier signal modulated by the remote controller signal is superimposed on the unmodulated audio carrier signal. Further, when the input key 30 is operated while the audio signal is being input, a signal in which both the audio carrier signal modulated according to the audio signal and the remote control signal carrier signal modulated with the remote control signal are superimposed. The infrared light emitting LED 26 is driven by.

In the embodiment shown in FIG. 2, the singer adjusts the pitch of the accompaniment music to the pitch of the singer's voice,
Operations such as volume adjustment can be performed while singing.

The input key 30 in the above embodiment is used.
Is not limited to a numeric keypad or the like, and may be a push button switch or the like.

[0021]

As described above, since the infrared wireless microphone of the present invention is constructed, the following special effects are obtained.

In the infrared wireless microphone according to the present invention, adjustment operation of the acoustic device on the receiver side can be performed from the infrared wireless microphone, and the conventional remote control device or the like provided separately is used. Easy to operate compared to. This is especially convenient for the singer himself who has an infrared wireless microphone to make adjustments. Moreover, the number of parts can be reduced as compared with the case where a remote control device is separately provided, and the entire device can be manufactured at low cost.

In the infrared wireless microphone of the second aspect, the remote control signal can be transmitted at the same time as the voice signal, which is extremely convenient for the singer to adjust the pitch of the accompaniment music while singing.

[Brief description of drawings]

FIG. 1 is a block circuit diagram of an embodiment of an infrared wireless microphone of the present invention.

FIG. 2 is a block circuit diagram of another embodiment of the infrared wireless microphone of the present invention.

[Explanation of symbols]

 10 Microphone 16 Voice Modulator 18 Voice Carrier Oscillator 22 Switcher 24 LED Driver 26 Infrared Light Emitting LED 30 Input Key 32 Microcomputer 34 Remote Control Signal Carrier Oscillator 36 Remote Control Signal Modulator 50 Mixer

Continuation of front page (51) Int.Cl. ⁶ Identification code Office reference number FI Technical display location H04B 10/00 H04Q 9/00 311 U

Claims (2)

[Claims] 1. An infrared wireless microphone in which an infrared light emitting LED is driven by an LED driver in response to a sound carrier signal modulated by an electric signal outputted by converting a sound signal inputted to a microphone, and the LE is used.
A switch is provided in front of the D driver, an input key, a microcomputer that outputs a remote control signal in response to the operation of the input key, and a remote control signal carrier oscillator that oscillates a remote control signal carrier having a frequency different from that of the voice carrier signal. And a remote control signal modulator that modulates the remote control signal carrier with the remote control signal, and a voice carrier signal modulated according to the voice signal by the switch and a remote control signal modulated according to the remote control signal. One of carrier wave signals is selected and added to the LED driver, and when the input key is operated, the switch is selected by the control of the microcomputer to select the remote controller signal carrier wave signal. Infrared wireless microphone. 2. An infrared wireless microphone in which an infrared light emitting LED is driven by an LED driver according to a sound carrier signal modulated by an electric signal outputted by converting a sound signal inputted to a microphone and outputted,
A mixer is provided in front of the D driver, an input key, a microcomputer that outputs a remote control signal in response to the operation of the input key, and a remote control signal carrier oscillator that oscillates a remote control signal carrier having a frequency different from that of the voice carrier signal. And a remote control signal modulator that modulates the remote control signal carrier with the remote control signal, and a sound carrier signal modulated according to the sound signal by the mixer and a remote control signal modulated according to the remote control signal. An infrared wireless microphone, characterized in that a carrier signal is mixed and applied to the LED driver.