JP2007088907A - Signal transmission apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal transmission apparatus capable of also causing a signal receiver that the relevant signal transmitter does not originally pair with each other, to receive a signal by a tone signal and does not cause a signal recepter which is not required to receive a signal, to receive a signal. <P>SOLUTION: The apparatus includes: an operating means 9 that is a selection means for selecting any arbitrary tone signal among from a plurality of tone signals different from each other; a control means 8 that is a generation means for generating the frequency of a sub carrier related to the selected tone signal; and a tone signal setting means 10 including a tracking filter 11 for settling the level of a signal from that control means to a predetermined value, wherein a tone signal can be selected and set to match a signal receiver to be paired and a tone signal with each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a signal transmission device that transmits a signal such as audio data.
In particular, the present invention relates to a signal transmitting apparatus configured to transmit a tone signal for specifying a receiving partner on a subcarrier, recognize the receiving side paired with the tone signal, and transmit carrier data.

A signal transmission apparatus is useful only when a signal reception apparatus that receives a signal from the signal transmission apparatus is provided, and transmission and reception of signals are performed. In other words, the signal transmitting device forms a pair with the signal receiving device for signal transmission, and the function is valuable.
Furthermore, the signal transmission device will send unnecessary signals to the signal reception device that is not the target of the pair, or the signal reception device will receive an unnecessary signal from the signal transmission device that is not the target of the pair. It is a problem.

  Therefore, in order to avoid such a situation, only a specific signal receiving device receives a signal from a specific signal transmitting device, and other signal receiving devices cannot receive a signal from the specific signal transmitting device, The signal transmission device transmits a signal carrying a tone signal for determining a pair so that the specific signal reception device cannot form a signal from another signal transmission device, and the signal reception device Determines whether a tone signal corresponding to the pair is included in the received signal.

  As described above, a technique in which a specific signal receiving device forms a pair with a specific signal transmitting device is disclosed in the following publications.

Japanese Patent Laid-Open No. 2004-128566

The content of the invention disclosed in Japanese Patent Application Laid-Open No. 2004-128566 includes a tone signal generator, a memory, and information input means on the signal transmission side, and a tone burst generator on the signal reception side. .
The information input means writes predetermined information encoded in the memory, the transmission-side control means reads the information as serial data from the memory, and the signal reception-side control means sets the set information. It is configured to display on the display when it is obtained.

In the invention disclosed in Japanese Patent Application Laid-Open No. 2004-128566, the signal transmission side sends a signal by placing a tone signal on a subcarrier, and the signal reception side makes a combination corresponding to only a pair of tone signals. Since signal reception is performed by configuring, it is possible to transmit and receive signals between the signal transmission side and the signal reception side corresponding to each other.
However, the present invention is configured to always manage the signal transmission device and the signal reception device as a pair. That is, since the signal transmission apparatus of the present invention specifies only one type of signal reception apparatus, there arises a problem that it does not correspond to a signal reception apparatus provided with another different signal discriminator.

Here, for example, consider a wireless karaoke system as an example of signal transmission and reception. In a wireless karaoke system, a signal transmission device that sends a signal related to the voice of a karaoke song is incorporated in the main body of the microphone.
A user uses a microphone with a built-in signal transmission device in his / her hand, but may drop the signal transmission device or give a strong impact, resulting in damage to the signal transmission device. .
On the other hand, the signal receiving device that receives a signal related to the voice of karaoke singing is less likely to have a malfunction than the signal transmitting device, but may also be damaged due to an impact or the like when the device body is moved. .

Therefore, in such a case, it is desirable that signals can be transmitted and received even with a combination of a signal transmission device and a signal reception device that are not originally paired.
However, as described above, if a signal transmission device does not transmit a signal by specifying a pair of signal reception devices, the signal transmission device will also send a signal to a signal transmission device that does not desire reception, and originally identifies the reception destination. This deviates from the premise of sending a signal.
Therefore, it cannot be used in a combination of a signal transmitting device and a signal receiving device that do not correspond to each other as a pair.

  The present invention has been made in view of the above circumstances, and a signal transmitting device that can send a signal to signal receiving devices that do not originally correspond to each other as a pair and that does not require a signal. The present invention provides a signal transmission device that does not send a signal to a reception device.

  The present invention is a signal transmission device capable of arbitrarily transmitting a plurality of tone signals.

  The detailed configuration includes an AF amplifier that amplifies an input signal to a predetermined level, a VCO circuit that is connected to a subsequent stage of the AF amplifier and oscillates a signal from the AF amplifier at a set frequency, An RF circuit that is connected to the subsequent stage of the VCO circuit and amplifies the signal from the VCO circuit to a predetermined level, a low-pass filter that is connected to the subsequent stage of the RF circuit and removes spurious from the signal from the RF circuit, and the low-pass filter An antenna for transmitting a signal connected to a subsequent stage of the filter, a PLL circuit connected to the VCO circuit for setting a frequency (of a carrier wave) sent from the VCO circuit to the RF circuit, and the PLL circuit And a control means for controlling the function of the PLL circuit so that the VCO circuit outputs a signal at a predetermined frequency. Furthermore, selecting means for selecting an arbitrary tone signal from a plurality of tone signals having different subcarrier frequencies, and generating means for generating a subcarrier frequency related to the tone signal selected by the selecting means, And a tracking filter for adjusting the level of the signal related to the frequency of the subcarrier from the generating means to a predetermined value, and sending a signal indicating the frequency of the subcarrier of the tone signal from the tracking filter to the VCO circuit This is a signal transmission device provided with tone signal generation means having the configuration.

  The tone signal generating means may be configured to generate a desired tone signal based on the clock signal from the clock signal generating means provided in the control means.

  The signal transmitting apparatus having such a configuration can arbitrarily select and transmit a tone signal for determining a pair.

  In the present invention, the tone signal for determining the configuration of the pair with the signal receiving apparatus can be selected and sent from a plurality of different tone signals, so that the frequency of the subcarrier related to the tone signal can be reduced. This is a signal transmission device capable of forming a pair for a plurality of different reception devices and receiving a signal as a result.

  The best mode for carrying out the present invention will be described below in detail with reference to the drawings. However, the present invention is not limited to the best mode.

The signal transmitting device T converts the voice of karaoke singing into an electrical signal and transmits the electrical signal to the signal receiving device side.
As shown in FIG. 1, the signal transmission device T includes a microphone 1, an AF amplifier 2, a VCO circuit 3, an RF circuit 4, a low-pass filter 5 (hereinafter referred to as LPF 5), an antenna 6, and a PLL circuit. 7, a control unit 8, an operation unit 9, and a tone signal generation unit 10.

The microphone 1 converts the voice of the user's karaoke song into an electrical signal and sends it to the AF amplifier 2.
The AF amplifier 2 is connected to the subsequent stage of the microphone 1. When receiving the signal from the microphone 1, the AF amplifier 2 amplifies the signal to a predetermined level and sends it to the VCO circuit 3.
The VCO circuit 3 receives information (signal) related to the frequency related to the carrier wave from the PLL circuit 7 and oscillates the carrier wave of a specific frequency.
Here, in the VCO circuit 3, a signal related to the sound from the AF amplifier 2 is placed on the carrier wave.

The RF circuit 4 is connected to the subsequent stage of the VCO circuit 3 and amplifies the signal from the VCO circuit 3 to a predetermined level.
The LPF 5 is connected to the subsequent stage of the RF circuit 4 and removes spurious signals from the signal from the RF circuit 4.
The antenna 6 is connected to the subsequent stage of the LPF 5 and transmits a signal from the LPF 5.

The PLL circuit 7 is connected to the VCO circuit 3 and is used to set a frequency (carrier wave) of a signal sent from the VCO circuit 3 to the RF circuit 4.
The control means 8 is connected to the preceding stage of the PLL circuit 7 and controls the function of the PLL circuit 7 so that the VCO circuit 3 outputs a signal at a predetermined frequency.
The operation means 9 is connected to the previous stage of the control means 8 and operates the output of the signal transmission device T.

The tone signal generating means 10 generates and outputs a sub-carrier having a frequency arbitrarily selected by the user as a carrier for the tone signal.
The tone signal generation means 10 includes an operation means 9 that is a selection means for selecting an arbitrary tone signal from a plurality of tone signals having different subcarrier frequencies, and a frequency determined in accordance with the selection from the operation means 9. The control unit 8 is a generation unit that generates information (signal) related to the subcarrier, and the tracking filter 11 is used to adjust the level of information (signal) from the control unit 8 to a predetermined value.
Note that the selection of the tone signal means that the frequency of the subcarrier that carries the tone signal is selected.

The tone signal generating means 10 is connected to the VCO circuit 3 and sends information relating to the generated arbitrary frequency to the VOC circuit 3.
The tone signal is generated by the control means 9 having crystal oscillation type clock signal generation means (not shown), and information relating to a desired frequency based on the clock signal generated by the clock signal generation means. (Signal) is generated.

  In the signal transmission device T, the microphone 1 has a shape in which the partial spherical body of the sound collection unit is placed on the cylindrical portion. The cylindrical portion is a grip portion of the user, and an AF amplifier 2, a VCO circuit 3, an RF circuit 4, an LPF 5, a PLL circuit 7, a control means 8, and a tone signal generating means 10 are provided in a hollow portion inside the cylindrical portion. It is stored.

The signal transmission device T is configured as described above. In the following, the use of the signal transmission device T will be described.
The user prepares a signal receiving device A (not shown) that forms a pair with the signal transmitting device T, and turns on the power.
Note that the frequency of the subcarrier, which is a tone signal common to the signal transmission device T and the pair of signal reception devices A, is 32.768 KHz.
The signal receiving apparatus A has not only the reception of the signal related to the karaoke singing voice from the signal transmitting apparatus T but also the function of converting the received signal into a voice, amplifying and outputting the voice.

The user operates the operation means 9 to make the signal transmission device T outputable, that is, usable.
Subsequently, the user performs karaoke singing toward the microphone 1 in accordance with the background music.
Here, the microphone 1 converts the voice of the user's karaoke song into an electrical signal and sends it to the AF amplifier 2.

When receiving a signal from the microphone 1, the AF amplifier 2 amplifies the signal to a predetermined level and sends it to the VCO circuit 3.
The VCO circuit 3 puts a signal related to the voice of the karaoke song from the AF amplifier 2 on a carrier wave having a frequency set in cooperation with the PLL circuit 7 and sends it to the RF circuit 4.
The VCO circuit 3 outputs a subcarrier tone signal having a frequency of 32.768 KHz from the tone signal generating means 10 to the carrier wave of the signal related to the voice of the karaoke song from the AF amplifier 2 together with the carrier wave. Send to 4.

Note that the generation of the subcarrier having a frequency of 32.768 KHz is performed by the function of the tone signal generation means 10.
That is, when the user sets a frequency of 32.768 KHz by the operation means 9, the control means 8 generates information (signal) related to the subcarrier having a frequency of 32.768 KHz based on the clock signal of the built-in clock signal generation means. And sent to the tracking filter 11.
When the tracking filter 11 receives the information on the subcarrier from the control means 8, the tracking filter 11 adjusts the level to a constant value and sends it to the VCO circuit 3.

The RF circuit 4 amplifies the signal related to the voice of the karaoke song placed on the carrier wave by the VCO circuit 3 to a predetermined level and sends it to the LPF 5.
When the LPF 5 receives a signal related to the voice of the karaoke song from the RF circuit 4, it removes spurious contained in the signal and sends it to the antenna 6.

When the antenna 6 receives a signal related to the voice of the karaoke song from the LPF 5, the antenna 6 transmits the signal as a radio wave.
Here, when the signal receiving device A receives the signal related to the voice of the karaoke song from the signal transmitting device T, the frequency of the subcarrier of the tone signal is 32.768 KHz. A signal related to the voice of the karaoke song placed on is received, and the received signal is converted into a voice, amplified and output.
The users and those around them listen to the voice of the user's karaoke singing from the signal receiving device A.

  Here, the signal receiving apparatus A becomes faulty and cannot be used. Furthermore, if there is no signal receiving device that forms a pair with the signal transmitting side with the frequency of the subcarrier of the tone signal being 32.768 KHz in the same manner as the signal receiving device A, there is no failure in the signal transmitting device T. Without it, the user cannot enjoy karaoke songs.

However, the user is made to function the tone signal generation means 10 of the signal transmission device T in correspondence with the signal reception device B that forms a pair with the signal transmission side when the frequency of the subcarrier of the tone signal is 38.400 KHz, A tone signal having a frequency of 38.400 KHz is output.
That is, the user performs an operation of switching the frequency of the tone signal from 32.768 KHz to 38.400 KHz by the operation means 9.

Here, the control means 8 receives a signal indicating that the frequency of the tone signal is set to 38.400 KHz from the operation means 9, and generates a subcarrier having a frequency of 38.400 KHz based on the clock signal of the built-in clock signal generation means. It is generated and sent to the tracking filter 11.
When the tracking filter 11 receives information (signal) related to the frequency of the subcarrier from the control means 8, the tracking filter 11 adjusts the level of the signal to a constant value and sends it to the VCO circuit 3.

The VCO circuit 3 puts a signal related to the voice of the karaoke song from the AF amplifier 2 on a carrier wave, and puts a tone signal on a subcarrier having a frequency of 38.400 KHz and sends it to the RF circuit 4.
A signal related to the voice of the karaoke song is output from the antenna 6 after being subjected to predetermined processing by the RF circuit 4 and the LPF 5.
Here, when the signal receiving device B receives the signal from the signal transmitting device T, the frequency of the subcarrier related to the tone signal is 38.400 KHz, so that the signal from the signal transmitting side constituting the pair Determine and receive the signal from the signal transmission device T.

Similarly to the signal receiving device A, the signal receiving device B performs a predetermined process on the signal related to the karaoke singing voice from the signal transmitting device T, and outputs the amplified karaoke singing voice.
In other words, the tone signal from the signal transmitting device T causes the signal receiving device A and the signal receiving device B, which have different subcarrier frequencies related to the tone signal, to determine that they form a pair, and the signal receiving device A In addition, the signal receiver B can also receive a signal related to the voice of the karaoke song.

  On the other hand, when transmitting a carrier wave, the signal transmitting apparatus T transmits a tone signal together. Therefore, only the signal receiving apparatus that forms a pair with respect to the tone signal receives the carrier wave, Since the carrier wave is not received by the signal receiving apparatus that is not configured, there is no problem that the signal receiving apparatus that does not configure the pair receives a signal from the signal transmitting apparatus T.

  The signal transmission device T is for transmitting the voice of karaoke singing. For example, even a so-called specific calling radio device that transmits a signal so that a signal is received only by a limited number of recipients. Good. In the signal transmission device T, the signal (radio wave) to be transmitted relates to the voice of a karaoke song, that is, an audio signal, but relates to a video, a video, a composite of audio and video, etc. Also good.

The signal transmitting apparatus T uses two frequencies of 32.768 KHz and 38.400 KHz as subcarrier frequencies related to the tone signal, but may be configured to use three or more tone signals. The tone signal may be configured to use a tone signal having a different frequency.
In the signal transmission device T, the input end of the signal to be transmitted is the microphone 1, but the front stage of the AF amplifier 2 may be an input terminal so that an arbitrary signal can be transmitted.

  In addition to the tone transmitter 10 being provided in the signal transmitter T, the signal receiver can also select and switch a plurality of tone signals at the same time by the configuration of the signal receiver. Even if used, it is possible to avoid receiving signals other than the pair by using different tone signals for each pair.

It is a functional block diagram which shows the structure of the signal transmitter of embodiment of this invention.

Explanation of symbols

T: Signal transmission device 1: Microphone 2: AF amplifier 3: VCO circuit 4: RF circuit 5: Low-pass filter (LPF)
6: Antenna 7: PLL circuit 8: Control means (generation means of tone signal generation means)
9: Operation means (selection means for tone signal generation means)
10: tone signal generation means 11: tracking filter (scene signal generation means)

Claims (2)

An AF amplifier that amplifies an input signal to a predetermined level, a VCO circuit that is connected to a subsequent stage of the AF amplifier and oscillates the signal from the AF amplifier at a set frequency, and a subsequent stage of the VCO circuit Connected to the RF circuit that amplifies the signal from the VCO circuit to a predetermined level, connected to the subsequent stage of the RF circuit, and connected to the subsequent stage of the low-pass filter that removes spurious from the signal from the RF circuit. An antenna for transmitting a signal, connected to the VCO circuit, a PLL circuit for setting a frequency (of a carrier wave) sent from the VCO circuit to the RF circuit, and connected to a preceding stage of the PLL circuit; Control means for controlling the function of the PLL circuit is provided so that the VCO circuit outputs a signal at a predetermined frequency,
Furthermore, selecting means for selecting an arbitrary tone signal from a plurality of tone signals having different subcarrier frequencies, and generating means for generating a subcarrier frequency related to the tone signal selected by the selecting means, And a tracking filter for adjusting the level of the signal related to the frequency of the subcarrier from the generating means to a predetermined value, and sending a signal indicating the frequency of the subcarrier of the tone signal from the tracking filter to the VCO circuit A signal transmission apparatus provided with tone signal generation means having the configuration.
  2. The signal transmission apparatus according to claim 1, wherein the control means includes a clock signal generation means, and generates a tone signal having a desired frequency based on a clock signal from the clock signal generation means.

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