KR102274411B1 - A combining and distributing device for a wireless acoustic signal trasmission system - Google Patents

Abstract

A combining and distributing device for a wireless acoustic signal transmission system of the present invention includes: a first port to which a signal is input/output; a plurality of second ports to which signals are input/output; and a combiner (divider) installed on a circuit line between the first port and the second ports, in which a signal input from the first port is distributed to the second ports in a distribution mode, and signals input from the second ports are synthesized and output to the first port in a synthesis mode, wherein a first amplifier and a second amplifier are installed on a line between the first port and the plurality of second ports, so that the first amplifier is activated in the synthesis mode to amplify the signal input to the second port, and the second amplifier is activated in the distribution mode to amplify the signal input to the first port.

Description

Distributive synthesizer of wireless acoustic signal transmission system {A COMBINING AND DISTRIBUTING DEVICE FOR A WIRELESS ACOUSTIC SIGNAL TRASMISSION SYSTEM}

The present invention relates to a distribution synthesizer of a wireless acoustic signal transmission system. More particularly, it relates to a distribution synthesizer in which a synthesizer for synthesizing and outputting signals received from a plurality of devices and a splitter for outputting a signal received from one device to a plurality of devices are integrated.

As disclosed in Korean Patent Registration No. 1914287, the existing wireless microphone system includes a plurality of microphones, that is, a receiver for receiving signals from a wireless transmitter. The signal received by this receiver is converted into an audio signal through circuit elements installed in the receiver, such as a filter, amplifier, and demodulator, and finally audio is output through a speaker.

The receiver of the existing wireless microphone system synthesizes signals received from a plurality of microphones and outputs them through a speaker, but does not perform a distribution function of transmitting a signal received from one microphone to a plurality of speakers.

Korean Patent Registration No. 1914287 (Notice on November 01, 2018)

The present invention uses a common circuit by performing a synthesizer for synthesizing signals received from a plurality of microphones and outputting them to a speaker and a distributor for distributing signals received from one microphone and outputting them to a plurality of speakers as one device It provides a distribution synthesizer of a wireless acoustic signal transmission system that can perform the function of

A distribution synthesizer of a wireless acoustic signal transmission system according to an aspect of the present invention includes: a first port to which a signal is input and output; a plurality of second ports to which signals are input and output; It is installed on a circuit line between the first port and the plurality of second ports to distribute the signal input from the first port to the plurality of second ports in the distribution mode, and input from the plurality of second ports in the synthesis mode. A combiner (divider) for synthesizing signals to be output to the first port; includes, wherein a first amplifier and a second amplifier are installed on a line between the first port and the plurality of second ports, The first amplifier may be activated in the synthesis mode to amplify the signal input to the second port, and the second amplifier may be activated in the distribution mode to amplify the signal input to the first port.

In addition, the combiner (divider) synthesizes two signals into one or divides one signal into two, and three combiners (dividers) are installed in two stages, the first port is one, The second port is composed of four, and the combiner (divider) of the second stage synthesizes the signals input from the four second ports into one in the synthesis mode and outputs it to the first port, and in the distribution mode, the first port It is possible to divide the input signal into 4 and output it to 4 second ports.

A line connected from the first port to the second port is branched into two, the first amplifier and the second amplifier are installed on each line, and switches are installed at branch points of both ends, respectively, so that in the distribution mode, the second It can be controlled so that the radio wave passes only through the amplifier and only the radio wave passes through the first amplifier in the synthesis mode.

A plurality of sets of the first port, the second port and the circuit connected thereto are installed, a cascade port is formed in the circuit, and a combiner (divider) is provided in a line connecting the first port and the second port. is installed one more, and the cascade port and the further installed combiner (divider) are connected by a line, and the distribution and synthesis capacity is multiplied by connecting the cascade port of one circuit and the first port of another circuit can make it happen

In addition, the band pass filter for filtering by branching the radio signal passing through the line between the first port and the second port; an amplifier for amplifying the signal passing through the bandpass filter; a detector converting the RF signal amplified by the amplifier into a DC signal; a control unit configured to detect a signal strength of the radio signal based on a voltage of the signal output from the detector; and a display unit for displaying the signal strength value detected by the control unit to the user.

In addition, sampling the voltage value of the DC signal output from the AD converter every predetermined time; calculating a median value for every 10 sampling values; calculating an average of a value immediately below and above the median value to calculate a unit average value; calculating the average value excluding the upper 10% and the lower 10% of the unit average values during the preset time after obtaining the unit average values for a preset time; A step of controlling the average value signal to be displayed on the display unit may be performed.

In addition, the control unit samples the voltage value by measuring once every 300th of a second, and calculates 30 unit sampling values per second, and 1 on the display unit based on the 30 unit sampling values. It can be controlled so that the signal strength is displayed once per second.

According to the present invention, since a single distribution synthesizer can distribute or synthesize signals according to the distribution mode and the synthesis mode, it is not necessary to provide the distributor and the synthesizer as separate devices. Therefore, it is possible to flexibly cope with various sound system installation environments with different demands for the number of microphones and speakers, and resources such as common circuit elements and ports are used in the distribution mode and the synthesis mode, so resources can be saved.

In addition, since a display unit that measures and displays the signal strength is provided, users and installers can easily check whether there is any abnormality in the construction process without additional measuring equipment when constructing the sound system.

1 is a configuration diagram showing a distribution mode of a wireless acoustic signal transmission system according to an embodiment of the present invention;
2 is a configuration diagram showing a synthesis mode of a wireless acoustic signal transmission system according to an embodiment of the present invention;
3 is a conceptual diagram showing an internal circuit configuration of a distribution synthesizer of a wireless acoustic signal transmission system according to an embodiment of the present invention;
4 is a conceptual diagram showing a signal path when a distribution synthesizer of a wireless acoustic signal transmission system according to an embodiment of the present invention operates in a distribution mode;
5 is a conceptual diagram showing a signal path when a distribution synthesizer of a wireless acoustic signal transmission system according to an embodiment of the present invention operates in a synthesis mode;
6 is a flowchart showing a signal strength display method of a distribution synthesizer according to an embodiment of the present invention;
7 is a conceptual diagram illustrating a signal strength calculation method of a distribution synthesizer according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The accompanying drawings show exemplary forms of the present invention, which are only provided to explain the present invention in more detail, and the technical scope of the present invention is not limited thereby.

In addition, regardless of the reference numerals, the same or corresponding components are given the same reference numerals and redundant description thereof will be omitted, and for convenience of explanation, the size and shape of each component shown may be exaggerated or reduced. have.

On the other hand, terms including an ordinal number, such as first or second, may be used to describe various components, but the components are not limited by the terms, and the terms refer to one component from another. It is used only for distinguishing purposes.

1 is a configuration diagram showing a distribution mode of a wireless acoustic signal transmission system according to an embodiment of the present invention, FIG. 2 is a configuration diagram showing a composition mode of a wireless acoustic signal transmission system according to an embodiment of the present invention, and FIG. A conceptual diagram showing the internal circuit configuration of a distribution synthesizer 1 of a wireless acoustic signal transmission system according to an embodiment of the present invention, FIG. 4 is a distributed synthesizer 1 of a wireless acoustic signal transmission system according to an embodiment of the present invention in a distribution mode 5 is a conceptual diagram showing a signal path when operating, FIG. 5 is a conceptual diagram showing a signal path when the distribution synthesizer 1 of a wireless acoustic signal transmission system according to an embodiment of the present invention operates in a synthesis mode, FIG. 6 is the present invention Fig. 7 is a conceptual diagram showing a signal strength calculation method of the distribution synthesizer 1 according to an embodiment of the present invention.

The wireless acoustic signal transmission system according to an embodiment of the present invention may operate in the distribution mode shown in FIG. 1 and the synthesis mode shown in FIG. 2 . As shown in FIG. 1, the wireless acoustic signal transmission system receives a signal received from a single transmitter, that is, a wireless microphone 5, in a distribution mode, a plurality of receivers, that is, a wireless receiver 4 and a speaker 9 connected thereto. It may include a distribution synthesizer (1) to deliver to. The distribution synthesizer 1 has an input/output port, and a wireless receiver 7 may be connected to the input port. The radio receiver 7 may include an antenna. In addition, a wireless antenna 8 for wirelessly transmitting a radio signal may be connected to the output port.

In the wireless acoustic signal transmission system shown in FIG. 2, the distribution synthesizer 1 operates in the synthesis mode. The radio waves transmitted from the plurality of microphones 5 are received through the wireless antennas 8 connected to the plurality of input ports of the distribution synthesizer 1 . The distribution synthesizer 1 may convert these signals and output them to the speaker 9 through the wired receiver 6 .

The distribution synthesizer 1 of this embodiment has a total of five input/output ports, and their functions are converted in such a way that, when the mode is changed, the input port acts as an output port and the output port acts as an input port. That is, in the distribution mode shown in FIGS. 1 and 4 , one first port 15 connected to the wireless receiver 7 acts as an input port of the distribution synthesizer 1 , and the four second ports connected to the wireless antenna 8 . The second port 13 acts as an output port. Conversely, in the synthesis mode of FIG. 2 , four second ports 13 connected to the wireless antenna 8 act as input ports, and one first port 15 connected to the wired receiver 6 acts as an output port.

In the distribution mode, the voice received from the microphone 5 may be output to the plurality of speakers 9 by dividing the signal received through the input port and outputting the signal to the four output ports. In addition, in the synthesis mode, the signals received from the plurality of microphones 5 are synthesized and transmitted through one output port, so that the voice can be output through the speaker 9 . In the distribution mode of FIG. 1, both input and output signals were transmitted by wireless communication, and in the synthesis mode of FIG. 2, reception was set as wireless and transmission was set as wired, but some ports were changed from wireless to wired or from wired to wireless communication. It will also be possible

3 to 5, the distribution synthesizer 1 of this embodiment has a signal processing circuit therein. This circuit can be configured economically and efficiently to perform both signal distribution and synthesis using few circuit elements.

The circuit of the distribution synthesizer 1 has an input/output port. As shown in FIG. 3 , in this embodiment, one first port 15 and four second ports 13 may be provided. The first port 15 and the second port 13 are connected to an external circuit by wire or wirelessly to transmit and receive signals. Also, the distributive synthesizer (1) circuit may include a cascade port (17). The signal output to the cascade port 17 is transmitted to another distribution synthesizer 1 circuit, so that it can be used to expand the input/output port. The distribution synthesizer 1 according to the present embodiment may have two circuits having the same configuration, and by connecting them, the distribution or synthesis capability can be expanded, and this can be achieved by connecting the cascade port 17 .

In addition, the distribution synthesizer 1 may include a plurality of combiners 41, 42, 43, 44, dividers. In the distribution mode shown in FIG. 4 , the signal input to the first port 15 is divided as it passes through a plurality of dividers 41 , 42 , 43 , 44 to four second ports 13 and a cascade port 17 . can be output. Since the signal output to the cascade port 17 may be input to the first port 15 of another circuit and output to the four second ports 13, a total of eight signals may be output during expansion.

The combiners 41 , 42 , 43 , 44 and the divider may act as a combiner or a divider depending on the input/output direction of the signal. In the distribution mode shown in FIG. 4 , the signal input to the first port 15 passes through the first divider 41 and is transmitted to the cascade port 17 and the second divider 42 , and the second divider 42 . The bifurcated signal is transmitted to the third divider 43 and the fourth divider 44, respectively, and this signal is again bifurcated at the third divider 43 and the fourth divider 44, for a total of 4 forked forked Signals output from the third divider 43 and the fourth divider 44 are transmitted to the outside through the four second ports 13 .

In the synthesis mode shown in FIG. 5, a signal is transmitted through a path opposite to that of the distribution mode. That is, two of the signals input to the four second ports 13 are input to the first combiner 43 and the other two are input to the second combiner 44 and synthesized. The two signals synthesized in this way are again input to the third combiner 42 and synthesized into one signal. The synthesized signal is transmitted to the fourth combiner 41 again and may be synthesized again with the signal input to the cascade port 17 here. The synthesized signals may be output through the first port 15 .

The first divider 41 in the distribution mode acts as a fourth combiner 41 in the composition mode, and the second divider 42 in the distribution mode serves as the third combiner 42 in the composition mode, in the distribution mode. The third divider 43 of , acts as the first combiner 43 in the composition mode, and the fourth divider 44 in the distribution mode acts as the second combiner 44 in the composition mode. This is because the divider can be used as a synthesizer if only the propagation direction is reversed using the same element.

On the other hand, the amplifiers 33 and 35 cannot change the input/output direction. Accordingly, the distribution synthesizer 1 circuit of this embodiment may include two amplifiers 33 and 35 . The first amplifier 33 and the second amplifier 35 are installed on the line between the first port 15 and the first combiner 43 . The line is branched from the first port 15 , so that the first amplifier 33 is installed on one line and the second amplifier 35 is installed on the other line. The first amplifier 33 is utilized in the synthesis mode and the second amplifier 35 is utilized in the distribution mode. To this end, the first amplifier 33 has an input terminal on the fourth combiner 41 side and an output terminal on the first port 15 side. Conversely, the second amplifier 35 has an input end on the first port 15 side and an output end on the first divider 41 (fourth combiner) side.

A first switch 31 is installed between the amplifiers 33 and 35 and the first port 15 and a second switch 37 is installed between the amplifier and the first divider 41 to cope with the mode change. In the synthesis mode, the switches 31 and 37 connect the line on the side of the first amplifier 33 , and in the distribution mode, the switches connect the line on the side of the second amplifier 35 .

Similarly, the third switch 38 between the fourth combiner 41 and the second switch 37 , and the fourth switch on the line between the fourth combiner 41 and the third combiner 42 . (39) is installed. These switches also serve to change a signal transmission path in response to a mode change, which may be controlled by the control unit 27 .

Accordingly, in the distribution mode shown in Fig. 4, the signal input to the first port 15 is the first switch 31, the second amplifier 35, the second switch 37, the third switch 38, the second The first divider 41 , the fourth switch 39 , the second divider 42 , the third divider 43 , the fourth divider 44 is amplified and distributed, and through the four second ports 13 , can be output. Similarly, in the synthesis mode shown in FIG. 5 , the signal input through the plurality of second ports 13 is applied to the first combiner 43 , the second combiner 44 , the third combiner 42 , The fourth switch 39 , the fourth combiner 41 , the third switch 38 , the second switch 37 , the first amplifier 33 , the first switch 31 , the first port 15 . It may be synthesized and amplified while passing through and outputted through the first port 15 .

Meanwhile, in the case of extending the port by using the cascade port 17 in the distribution mode, the signal may be distributed through a line branched from the first divider 41 and connected to the cascade port 17 . The cascade port 17 may be connected to the first port 15 of another circuit having the same configuration. The signal can then be divided into eight. In addition, even in the synthesis mode, the signal input to the second port 13 may be synthesized with signals of other circuits in the fourth combiner 41 (the first divider) and outputted through the first port 15 . Therefore, when the cascade port 17 is utilized, 8 inputs can be synthesized.

A plurality of circuits shown in Fig. 3 may be installed in one distribution synthesizer 1, one may be installed in a plurality of distribution synthesizers 1, and the cascade ports 17 of the plurality of distribution synthesizers 1 may be connected. .

The line between the first port 15 and the first switch 31 is branched and the coupler 21, the band pass filter 22, the amplifier 23, the band pass filter 24, the detector 25, the AD converter 26 , the control unit 27 , and the display unit 29 may be sequentially connected. These perform a function of detecting the strength of a signal input/output to the first port 15 . Regardless of the mode, the signal strength passing between the first port 15 and the amplifiers 33 and 35 is detected and displayed through the display unit 29 at the same location. When the cascade port 17 is utilized, the signal strength may be displayed on the plurality of display units 29 .

The signal passing through the line between the first port 15 and the first switch 31 passes through the band pass filter 22 to remove noise. The distribution synthesizer 1 according to the present embodiment may utilize a radio communication frequency of 900 MHz band, specifically, 925 ~ 937 MHz band. The band pass filter 22 passes the frequencies of this band. The amplifier 23 amplifies the signal, and a band pass filter 24 is installed thereafter to filter the amplified signal once again. The detector 25 converts the input RF signal into DC, and the AD converter 26 converts the voltage value of the DC signal into a digital signal. The control unit 27 receives this digital signal, obtains signal strength information, processes it, and displays it as a number to the user through the display unit 29 .

The detector 25 can analyze an input signal from -75 dBm to +10 dBm, and when the signal strength is lower than -75 dBm, 'LO' is displayed on the display unit 29, and 'HI' is displayed when the signal strength is higher than 10 dBm. do. In addition, the sign is removed from the number according to the dBm value and displayed on the display unit 29 . For example, when the signal strength is -50dBm, the -sign is removed and only the number ‘50’ is displayed, and in the case of -40dBm, the sign is removed and only the number ‘40’ is displayed. That is, the display unit 29 displays 'LO' when the signal strength is lower, the displayed number increases, and when the signal intensity is lower than -75 dBm, the reference value. Therefore, if the number displayed on the display is too large or 'LO' is displayed, the user may have a problem with the equipment because the signal strength is low, or the wireless communication with the microphone (5) or speaker (9) is not performed properly. finds out that you are not getting

In this way, the distribution synthesizer 1 according to the embodiment of the present invention implements the divider and the synthesizer in one circuit and has a function of displaying the signal strength at the same time, so that the user does not automatically measure the signal strength with a separate device. You can check the current communication status. Therefore, the user can conveniently install the speaker 9 and the microphone 5, and easily check the state of the overall wireless sound transmission system to help configure the system conveniently. 1 and 4, in the distribution mode, since the display unit 29 displays the signal strength transmitted from the microphone 5 to the first port 15 through the wireless receiver 7, the microphone 5 and The user can easily know whether the communication between the wireless receivers 7 is smooth or not broken. In the synthesis mode shown in FIGS. 2 and 5 , it is possible to easily check whether the signal strength transmitted to the speaker 9 is appropriate.

The numerical display of the signal strength may be displayed by continuously updating data every preset time. As shown in FIGS. 6 and 7 , the control unit 27 uses the signal input from the AD converter 26 to reprocess it and displays it on the display unit 29 .

The control unit 27 of the distribution synthesizer 1 according to the embodiment of the present invention samples the voltage value every 1/300 second and stores the data (S1). These sampling values are grouped into 10 units to calculate their median value, and the values just below and above the median value are calculated to obtain the average value of the two (S2, S3). This is called the unit average value of these 10 unit sampling values. As shown in FIG. 7 , since the values sampled every 1/300 second are grouped into 10 units, 30 units of 10 units are derived every 1 second, and the remainder except for the top 10% and the bottom 10% among these 30 The average of the unit average values is calculated and displayed on the display unit 29 (S4, S5). Accordingly, it was possible to display one value representing the signal strength of this time on the display unit 29 . After that, sampling is performed for 1 second in the same manner to obtain an average value and displayed on the display unit 29 . By repeating this, the display value information is updated and displayed every 1 second. The reason that the average value is obtained by tying 300 samples together without displaying the sampling values, and displaying the average of the upper and lower values by limiting the upper and lower values is because the signal often contains noise. In a situation where noise propagation occurs frequently, if all detected values are displayed in a shorter period, it may confuse the user and put strain on the device.

In the above, although embodiments of the present invention have been described, those of ordinary skill in the art can add, change, delete or add components within the scope that does not depart from the spirit of the present invention described in the claims. The present invention may be variously modified and changed by, etc., and this will also be included within the scope of the present invention.

41, 42, 43, 44; combiner (divider) 33; first amplifier
35; second amplifiers 22 and 24; band pass filter
25; Detector 26; AD converter
27; control 29; display unit

Claims (7)

a first port to which a signal is input and output;
a plurality of second ports to which signals are input and output;
It is installed on a circuit line between the first port and the plurality of second ports to distribute the signal input from the first port to the plurality of second ports in the distribution mode, and input from the plurality of second ports in the synthesis mode. Including; a combiner (divider) for synthesizing the signals to be output to the first port;
A first amplifier and a second amplifier are installed on a line between the first port and the plurality of second ports, and the first amplifier is activated in the synthesis mode to amplify a signal input to the second port, and The second amplifier is activated in the distribution mode to amplify the signal input to the first port,
a band pass filter for filtering by branching the radio signal passing through the line between the first port and the second port;
an amplifier amplifying the signal passing through the bandpass filter;
a detector for converting the RF signal amplified by the amplifier into a DC signal;
a control unit configured to detect a signal strength of the radio signal based on a voltage of the signal output from the detector;
A distribution synthesizer of a wireless acoustic signal transmission system comprising a; a display unit for displaying the signal strength value detected by the control unit to the user. According to claim 1,
The combiner (divider) synthesizes two signals into one or distributes one signal into two, and three combiners (dividers) are installed in two stages,
The first port is composed of one and the second port is composed of four, and the combiner (divider) of the second stage synthesizes the signals input from the four second ports into one and outputs it to the first port in the synthesis mode. and a distribution synthesizer of a wireless acoustic signal transmission system that divides the signal input from the first port into four and outputs it to four second ports in the distribution mode. According to claim 1,
A line connected from the first port to the second port is branched into two so that the first amplifier and the second amplifier are installed on each line, and switches are installed at branch points of both ends, respectively, so that in the distribution mode, the second A distribution synthesizer of a wireless acoustic signal transmission system in which radio waves pass only through the amplifier and the radio waves pass only through the first amplifier in the synthesis mode. According to claim 1,
A plurality of sets of the first port, the second port and the circuit connected thereto are installed, a cascade port is formed in the circuit, and a combiner (divider) is provided in a line connecting the first port and the second port. is installed one more, and the cascade port and the further installed combiner (divider) are connected by a line, and the distribution and synthesis capacity is multiplied by connecting the cascade port of one circuit and the first port of another circuit Distributive synthesizer of wireless acoustic signal transmission system. delete The method of claim 1, further comprising an AD converter that converts the voltage value of the DC signal of the detector into a digital signal and provides it to the control unit,
The control unit is
obtaining a sampling value by sampling the voltage value of the DC signal output from the AD converter at regular time intervals;
calculating an intermediate value for every 10 sampling values;
calculating an average of a value immediately below and above the median value to calculate a unit average value;
calculating the average value excluding the upper 10% and the lower 10% of the unit average values during the preset time after obtaining the unit average values for a preset time;
Distributive synthesizer of a wireless acoustic signal transmission system for performing the step of controlling to display the average value on the display unit. The method of claim 6, wherein the control unit,
The voltage value is sampled by measuring once every 300th of a second,
A distributed synthesizer of a wireless acoustic signal transmission system that calculates 30 unit average values per second, and controls so that the average value is updated and displayed on the display unit once every second based on the 30 unit average values.

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