KR102012193B1 - On-site Audio Center system based on Audio over IP - Google Patents

Abstract

The present invention relates to an on-site audio center system based on an audio over IP (AoIP), which is a system enabling the generation of a synthetic sound individually adjusted in the volume at a sound receiving side, by individually controlling the volume of a plurality of digital acoustic data received by a sound receiving module.

Description

On-site Audio Center system based on Audio over IP}

TECHNICAL FIELD The present invention relates to acoustic control technology, and more particularly, to an AoIP based on-site acoustic center system.

The acoustic system is not installed in one place, but varies depending on the intended use or environment. Depending on the purpose of use or the purpose of remote transmission, it may cause the sound quality and human material loss due to line loss.

The recent rapid development of Ethernet and IP technologies has also changed the sound industry. In addition, AoIP (Audio over IP) -based audio transmission has greatly improved the problems of the sound system (sound degradation due to remote transmission, complicated wiring).

A variety of transmission technologies, such as CobraNET, LiveWire, Dante, Q-LAN and RAVENNA, are appearing in the market for sound transmission based on LAN cables. In particular, the construction of an AoIP-based acoustic system can significantly reduce the cost of constructing an acoustic system.

The International Organization for Standardization divided the various network standard models from the first to seventh layers. Layer 1 is the physical connection layer, layer 2 is the data link layer, layer 3 is the IP network layer, and layer 4 or more is irrelevant to audio transmission.

Among network-based audio transmission technologies, CobraNET transmits and receives signals in Layer 2, and AoIP transmits sound signals in Layer 3. Although network-based sound transmission technology has been researched on audio over Ethernet (AoE) in the early stages of companies related to the sound industry, recently, various AoIP technologies are applied to its own protocol.

CobraNet is a technology that enables real-time transmission of acoustic signals at the data link layer. The system was developed by Cirrus Logic in the US in 1996 and is still operating with CobraNet technology.

In particular, the 48kHz, 20bit, 64 channels can be transmitted simultaneously. In addition, it has been used as an alternative to solve the acoustic signal reduction caused by electrical interference, high frequency attenuation and long distance transmission.

CobraNet is installed for the transmission of sound in large commercial facilities such as large stadiums, airports, theme parks, international conference halls, and performance halls, but there is a problem of paying a large fee for the technology fee or interface equipment required for ADC and DAC. have.

AoIP is a technology to transmit 44.1khz CD sound quality based on IP network. AoIP is different from VoIP. VoIP is used to transmit phone-quality signals, but AoIP can be implemented using existing networks. The delay of AoIP is within 0.01 seconds. A variety of uncompressed real-time sound transmission technologies based on AoIP are emerging on the market.

DANTE transmits audio signals over IP-based networks. Developed by Audinate of Australia, Dante is widely used in the acoustics industry for its speed, number of channels, ease of operation, flexibility and scalability.

In addition, by using the Internet standard protocols (TCP / IP, UDP / IP, etc.), it is possible to send and receive sound from other Dante equipment in the local network. Dante can transmit and receive Gigabit 24-bit 48kHz data in 512x512 channels, and it can transmit and receive 24-bit 96kHz and 256x256 channels.

DANTE sends and receives audio signals based on OSI Layer 3 IP networks. In addition, many sound companies have applied the DANTE protocol to their products for reasons of transmission speed, multichannel transmission, and scalability.

Dante has the advantage of operating in an IP network. However, products that have adopted Dante technology for many years now present many problems with sound loss in complex networks.

DANTE transmits audio signals, controls network connections, monitors status, and monitors signal delay. However, it does not control the level control or sound quality of the transmission signal. Nevertheless, it is regarded as a good system for a single connection such as the connection between the audio mixer in a broadcasting room and the system on stage.

In Korean Patent Laid-Open No. 10-2012-0123191 (Nov. 8, 2012), in the Audio over Internet Protocol (AoIP) network, which transmits sound data to an Internet Protocol (IP), the efficiency of device management on a single network and a number of As a solution in case of problems such as short circuit, link down or abnormality of network equipment, which can occur at the same time at the node, a technology for classifying and managing ring networks is proposed.

When the distributed audio devices in AoIP-based sound system access a large number of AoIP devices, if a problem occurs in the equipment, the connected system becomes impossible to operate. In addition, AoIP equipment only transmits audio signals and cannot be adjusted to suit the acoustic environment.

In the unpublished Korean Patent Application No. 10-2017-0077395 (June 19, 2017) filed by the present inventors, each of a plurality of sound input devices and a plurality of sound output devices are connected one-to-one through sound transmission modules and sound reception modules. By implementing the AoIP-based on-site acoustic center system as much as possible, and controlling the AoIP network configuration through a remote control PC, the sound input by the multiple sound input devices can be point-to-point. Or one-to-many or many-to-one or many-to-many transmission.

However, this technique could not individually control the volume of a plurality of digital sound data received by the sound receiving module through different IPs. If necessary, the user wants to adjust only the volume of the desired digital sound data among the plurality of digital sound data transmitted by the plurality of sound transmission modules and received by the sound receiving module, and to adjust the rest small.

Therefore, the present inventors have studied the AoIP-based on-site acoustic center system that can individually control the volume of a plurality of digital acoustic data received by the sound receiving module through different IPs.

Republic of Korea Patent Publication No. 10-2012-0123191 (2012.11.08)

The present invention provides a one-to-one connection between each of a plurality of sound input devices and a plurality of sound output devices through sound transmission modules and sound reception modules, and configures an AoIP network through a control PC to efficiently transmit sound. It is an object of the present invention to provide an AoIP-based on-site acoustic center system capable of individually controlling a volume of a plurality of digital acoustic data received by an acoustic receiving module.

According to an aspect of the present invention for achieving the above object, the AoIP-based on-site acoustic center system includes a plurality of sound transmission modules provided at each output end of the plurality of sound input devices; A plurality of sound receiving modules provided at each of input terminals of the plurality of sound output devices; A hub module connected between the plurality of sound transmitting modules and the plurality of sound receiving modules to configure an audio over IP network to output sounds input from the plurality of sound input devices to the plurality of sound output devices; It includes a control PC for performing a user setting for the AoIP network configured by the hub module, the sound receiving module is capable of volume control for each of the sounds received from the hub module.

According to an additional aspect of the present invention, an acoustic receiving module includes: a second Ethernet communication terminal for receiving digital acoustic data from a hub module; A second communication unit which receives digital sound data input through a second Ethernet communication terminal; A second controller for synthesizing and outputting digital sound data received by the second communication unit; A DA converter for converting AoIP-based digital sound data synthesized and output by the second controller into an analog sound signal; A plurality of receiving ports including a line output terminal for outputting an analog sound signal converted by the DA converter to a line level sound output device, wherein the second control unit receives each of the digital sound data from the second communication unit; A plurality of receive buffers for storing digital acoustic data received by each of the plurality of receive ports; A volume adjusting unit adjusting a volume of each of the digital sound data stored in each of the plurality of reception buffers; A synthesizer for synthesizing each digital sound data adjusted by the volume adjusting unit and outputting AoIP-based digital sound data; And a playback buffer for temporarily storing AoIP based digital sound data synthesized by the synthesizer.

According to an additional aspect of the present invention, the sound receiving module further includes a second serial communication terminal for receiving digital sound data from the hub module in a serial communication scheme.

According to an additional aspect of the present invention, when there are two or more connected multicast IPs, the second controller controls to synthesize digital sound data transmitted from each of the connected multicast IPs through a synthesizer.

According to a further aspect of the invention, a sound transmission module comprises: a microphone input terminal for microphone connection; A line input terminal for connecting a line level sound input device; An AD converter for converting an analog sound signal input through a microphone input terminal or a line input terminal into digital sound data; A first controller which performs transmission control of the digital sound data converted by the AD converter; A first communication unit for transmitting digital sound data based on AoIP; And a first Ethernet communication terminal for outputting digital sound data transmitted through the first communication unit to the hub module.

According to an additional aspect of the present invention, the sound transmission module further includes a first serial communication terminal for connecting a serial communication sound device.

According to an additional aspect of the present invention, the first controller transmits the digital sound data by designating the sound transmission module itself as a multicast IP.

The present invention provides a one-to-one connection between each of a plurality of sound input devices and a plurality of sound output devices through sound transmission modules and sound reception modules, and configures an AoIP network through a control PC to efficiently transmit sound. By separately controlling the volume of the plurality of digital sound data received by the sound receiving module, the sound receiving side has an effect of generating a sound volume adjusted synthesized sound individually.

1 is a block diagram showing the configuration of an embodiment of an AoIP-based on-site acoustic center system according to the present invention.
2 is a diagram illustrating an example of AoIP configuration information of the AoIP-based on-site acoustic center system according to the present invention.
3 is a block diagram showing the configuration of an embodiment of an acoustic transmission module of an AoIP based on-site acoustic center system according to the present invention.
Figure 4 is a block diagram showing the configuration of an embodiment of a sound receiving module of the AoIP-based on-site acoustic center system according to the present invention.
FIG. 5 is a block diagram illustrating an embodiment of a second control unit of an acoustic receiving module of an AoIP-based on-site acoustic center system according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily understand and reproduce the present invention.

In the following description of the present invention, detailed descriptions of well-known functions or configurations will be omitted if it is determined that the detailed description of the embodiments of the present invention may unnecessarily obscure the gist of the present invention.

The terms used throughout the present specification are terms defined in consideration of functions in the embodiments of the present invention, and may be sufficiently modified according to the intention, custom, etc. of the user or operator, and the definitions of these terms are defined throughout the present specification. It should be made based on the contents.

1 is a block diagram showing the configuration of an embodiment of an AoIP-based on-site acoustic center system according to the present invention. As shown in FIG. 1, the AoIP based on-site acoustic center system according to this embodiment includes a plurality of sound transmission modules 100, a plurality of sound reception modules 200, a hub module 300, and a control. PC 400 is made.

The plurality of sound transmission modules 100 may be provided at each output terminal of the plurality of sound input devices, and may include analog sound signals or digital sound data input from each of the analog sound input devices or the digital sound input devices. To send).

In this case, the analog sound input device refers to an audio device that inputs an analog sound signal to the sound transmission module 100, such as a microphone, and the digital sound input device inputs digital sound data to the sound transmission module 100, such as a synthesizer. Refers to an audio device, and a single sound transmission module 100 is provided for each sound input device.

For example, the sound transmission module 100 converts the analog sound signal input from the sound input device into digital sound data by performing pulse code modulation (PCM), and converts the converted digital sound data into a UDP (User Datagram Protocol) protocol. It may be implemented to broadcast (broadcasting) to at least one sound receiving module 200 designated through the hub module 300 using the.

The plurality of sound receiving modules 200 are provided at input terminals of the plurality of sound output devices, and receive digital sound data from the hub module 300, convert the sound data into analog sound signals, and output them to the plurality of sound output devices. do.

At this time, each sound receiving module 200 implements a volume control for each of the sounds received from the hub module 300, and synthesizes the sounds with volume control individually to generate AoIP-based digital sounds. It may be implemented to generate and convert it to an analog output to the sound output device.

For example, the sound output device may be a power amplifier that processes an analog sound signal and outputs sound to at least one speaker, and one sound receiving module 200 is provided for each sound output device.

The hub module 300 is connected between the plurality of sound transmission modules 100 and the plurality of sound receiving modules 200 to output sound input from a plurality of sound input devices to a plurality of sound output devices. Configure AoIP (Audio over IP) network.

For example, the hub module 300 refers to the AoIP network configuration information stored in advance, and the AoIP is connected between the sound transmission modules 100 connected to the sound input devices one-to-one and the sound reception modules 200 connected to the sound output devices one-to-one. It can be implemented to configure the network.

In this case, the AoIP network configuration information may be set by the control PC 400 as user setting information for selecting sound receiving modules 200 to receive digital sound data transmitted from the sound transmitting modules 100.

Meanwhile, the AoIP network configuration between the sound transmission modules 100 and the sound reception modules 200 may be configured through IP address mapping assigned to each of the sound transmission modules 100 and the sound reception modules 200.

The hub module 300 stores and manages an address mapping table according to the AoIP network configuration, and according to the IP addresses of the sound receiving modules 200 mapped to the IP addresses of the sound transmission modules 100 stored in the address mapping table. The digital sound data transmitted from the transmission modules 100 are multicasted to the sound reception modules 200.

2 is a diagram illustrating an example of AoIP configuration information of the AoIP-based on-site acoustic center system according to the present invention. Referring to FIG. 2, it can be seen that the sound transmission module 'Tx # 1' is configured to transmit digital sound data one-to-many to all of the sound reception modules 'Rx # 1', 'Rx # 2', and 'Rx # 3'. have.

Meanwhile, it can be seen that the sound transmission module 'Tx # 2' is set to transmit point-to-point (one-to-one) digital sound data only to the sound reception module 'Rx # 2', and the sound transmission module 'Tx # 3' refers to the sound reception module ' It can be seen that the digital sound data is set to transmit one-to-many to Rx # 2 'and' Rx # 3 '.

Meanwhile, all of the sound transmission modules 'Tx # 1', 'Tx # 2', and 'Tx # 3' are configured to transmit digital sound data to the sound reception module 'Rx # 2'. It is possible.

In this case, the hub module 300 transmits digital sound data transmitted from the sound transmitting module 'Tx # 1' to the sound receiving module 'Rx # 1', and transmits the sound transmitting module 'Tx' to the sound receiving module 'Rx # 2'. Transmit digital sound data transmitted from # 1 ',' Tx # 2 'and' Tx # 3 ', and transmit from the sound transmitting module' Tx # 1 'and' Tx # 3 'to the sound receiving module' Rx # 3 '. The digital audio data.

The control PC 400 performs user setting for the AoIP network configured by the hub module 300. At this time, the control PC 400 is connected to the hub module 300 by Ethernet to provide a user interface for setting the AoIP network configuration information, it can be implemented to receive and set the AoIP network configuration information from the user.

The AoIP network configuration information set by the control PC 400 includes the sound transmission module 100 connected one-to-one with the sound input devices by the hub module 300 and the sound reception module 200 connected one-to-one with the sound output devices. In the AoIP network configuration, the hub module 300 configures the AoIP network between the sound transmission modules 100 and the sound reception modules 200 according to the AoIP network configuration information.

Accordingly, the present invention implements an AoIP-based on-site acoustic center system such that each of the plurality of sound input devices and the plurality of sound output devices are connected one-to-one through sound transmission modules and sound reception modules, and AoIP through a remote control PC. By controlling the network configuration, sound input by multiple sound input devices can be point-to-point, one-to-many or many-to-many to multiple sound output devices. One- or many-to-many transmissions enable efficient field acoustic control management and operation.

In this case, the present invention may individually generate a sound volume adjusted synthesized sound on the sound receiving side by individually controlling a volume of the plurality of digital sound data received by the sound receiving module.

Accordingly, the user adjusts only the volume of the desired digital sound data among the plurality of digital sound data transmitted by the plurality of sound transmitting modules and received by the sound receiving module, and adjusts the rest to be small through the sound output device. I can listen.

3 is a block diagram showing the configuration of an embodiment of an acoustic transmission module of an AoIP based on-site acoustic center system according to the present invention. The sound transmission module 100 according to this embodiment includes a microphone input terminal 110, a line input terminal 120, an AD converter 130, a first control unit 140, a first communication unit 150, The first Ethernet communication terminal 160 is included.

The microphone input terminal 110 is a physical interface for connecting a microphone, and receives an analog sound signal from a microphone by connecting a microphone through the microphone input terminal 110.

The line input terminal 120 is a physical interface for connecting a line level sound input device, and connects the line level sound input device through the line input terminal 120 to exceed an acoustic signal level input through a microphone. Get input.

The sound signal level input through the microphone is very low, -70dBu to -10dBu, and the sound signal level input through the line level sound input device has a range of -30dBu to + 240dBu. The acoustic signal exceeding the acoustic signal level should be input through the line input terminal 120.

The AD converter 130 converts an analog sound signal input through the microphone input terminal 110 or the line input terminal 120 into digital sound data. For example, the AD converter 130 may be implemented to pulse-code modulate (PCM) analog sound signals input from an analog sound input device through the microphone input terminal 110 or the line input terminal 120 to convert them into digital sound data. Can be.

The first controller 140 performs transmission control of the digital sound data, and designates its IP as a multicast IP to transmit digital sound data. For example, the first controller 140 may control the digital sound data converted by the AD converter 130 to be transmitted using a UDP (User Datagram Protocol) protocol.

The first communication unit 150 transmits digital sound data based on AoIP. For example, the first communication unit 150 may control to broadcast the digital sound data to at least one designated sound receiving module 200.

The first Ethernet communication terminal 160 is a physical interface for outputting digital sound data transmitted through the first communication unit 150 to the hub module 300. The digital sound data output from the first Ethernet communication terminals 160 of the sound transmission modules 100 may include at least one sound designated by the hub module 300 through AoIP-based Ethernet configured according to AoIP network configuration information. It is sent to the receiving module 200.

Meanwhile, according to an additional aspect of the invention, the sound transmission module 100 may further include a first serial communication terminal 170. The first serial communication terminal 170 is a physical interface for connecting a serial communication audio device. The first serial communication terminal 170 connects a serial communication sound device such as a PC or a USB through the first serial communication terminal 170 to the AD from the serial communication sound device. The digital sound data, which does not require conversion, is input through a serial communication method and directly input to the first controller 140.

The digital sound data input from the serial communication sound device through the first serial communication terminal 170 is controlled to be transmitted by the first control unit 140 using a UDP (User Datagram Protocol) protocol, so that the first communication unit 150 is controlled. Can be transmitted based on AoIP.

Figure 4 is a block diagram showing the configuration of an embodiment of a sound receiving module of the AoIP-based on-site acoustic center system according to the present invention. As shown in FIG. 4, the sound receiving module 200 according to the present embodiment includes a second Ethernet communication terminal 210, a second communication unit 220, a second control unit 230, and a DA converter 240. ) And a line output terminal 250.

The second Ethernet communication terminal 210 is a physical interface for receiving digital sound data from the hub module 300.

When the sound data transmitted to the sound transmission modules 100 are transmitted by the hub module 300 to the designated sound reception module 200 through the AoIP-based Ethernet configured according to the AoIP network configuration information, each sound reception is performed. Digital acoustic data are input through the second Ethernet communication terminal 210 of the modules 200.

The second communication unit 220 receives digital sound data input through the second Ethernet communication terminal 210.

The second control unit 230 performs output control of the digital sound data received by the second communication unit 220, and when there are two or more connected multicast IPs, the second controller 230 transmits each of the connected multicast IPs. The volume of the digital sound data is individually adjusted, and the volume of the digital sound data whose volume is individually adjusted is synthesized and output.

In this case, the second controller 230 may provide a user interface for adjusting the volume of the digital sound data to the user terminal (not shown), and may adjust the volume of the digital sound data. . For example, the user terminal may be a PC or a smartphone. Meanwhile, the second control unit 230 and the user terminal may be connected through wired serial communication such as UART or wireless communication such as Bluetooth.

FIG. 5 is a block diagram illustrating an embodiment of a second control unit of an acoustic receiving module of an AoIP-based on-site acoustic center system according to the present invention. As shown in FIG. 5, the second controller 230 according to this embodiment includes a plurality of receive ports 231, a plurality of receive buffers 232, a volume adjuster 233, and a synthesizer 234. ) And a playback buffer 235.

The plurality of receiving ports 231 receive each of the digital sound data from the second communication unit 220. In this case, one receiving buffer 232 may be designated to correspond one-to-one to each receiving port 231.

The plurality of receive buffers 232 stores digital acoustic data received by each of the plurality of receive ports 231. For example, a callback function of a designated receiving port may be called to store digital sound data in a receiving buffer corresponding to each receiving port.

The volume adjusting unit 233 adjusts the volume for each of the digital sound data stored in each of the plurality of reception buffers 232. At this time, the volume adjusting unit 233 may be implemented to provide a user interface for adjusting the volume of each of the digital sound data output from each receiving buffer 232, thereby adjusting the volume of the digital sound data. have. For example, the user terminal may be a PC or a smartphone.

The synthesizer 234 synthesizes each digital sound data volume adjusted by the volume adjusting unit 233. For example, the synthesizer 234 calls a synthesis function to read digital sound data stored in each of the reception buffers 232, and adjusts the volume for each of the digital sound data through the volume adjusting unit 233. The synthesized audio data may be synthesized and output to the reproduction buffer 235.

The playback buffer 235 temporarily stores AoIP based digital sound data synthesized by the synthesizer 234. The AoIP-based digital sound data temporarily stored in the reproduction buffer 235 is output to the DA converter 240 for analog conversion.

The DA converter 240 converts AoIP-based digital sound data synthesized and output by the second controller 230 into an analog sound signal. For example, the DA converter 240 may be implemented to convert digital sound data transmitted and synthesized by pulse code modulation (PCM) into an analog sound signal.

The line output terminal 250 is a physical interface for outputting the analog sound signal converted by the DA converter 240 to the line level sound output device, and the analog to the line level sound output device through the line output terminal 250. A sound signal is output and sound is reproduced through the speaker.

Meanwhile, according to an additional aspect of the invention, the sound receiving module 200 may further include a second serial communication terminal 260. The second serial communication terminal 260 is a physical interface for receiving digital sound data from the hub module 300 in a serial communication method and outputting the digital sound data to the second controller 230.

The digital sound data input through the second serial communication terminal 260 is adjusted by the second controller 230, synthesized with other digital sound data, and then converted into an analog sound signal through the DA converter 240. The sound is converted and output to the line level sound output device through the line output terminal 250 to reproduce sound through the speaker.

By implementing in this way, the present invention implements an AoIP-based on-site acoustic center system such that each of the plurality of sound input devices and the plurality of sound output devices are connected one-to-one via sound transmission modules and sound reception modules, and a remote control PC By controlling the AoIP network configuration through the system, the sound input by multiple sound input devices can be point-to-point or one-to-many or many-to-one to multiple sound output devices. Many-to-One or Many-to-Many transmissions enable efficient field acoustic control management and operation.

In this case, the present invention may individually generate a sound volume adjusted synthesized sound on the sound receiving side by individually controlling a volume of the plurality of digital sound data received by the sound receiving module.

Accordingly, the user adjusts only the volume of the desired digital sound data among the plurality of digital sound data transmitted by the plurality of sound transmitting modules and received by the sound receiving module, and adjusts the rest to be small through the sound output device. I can listen.

The various embodiments disclosed in the specification and drawings are merely presented as specific examples for clarity and are not intended to limit the scope of the various embodiments of the present invention.

Accordingly, the scope of various embodiments of the present invention includes all changes or modifications derived based on the technical spirit of various embodiments of the present invention in addition to the embodiments described herein are included in the scope of the various embodiments of the present invention. Should be interpreted as

The present invention is industrially applicable in the field of acoustic control technology and its application.

100: sound transmission module
110: microphone input terminal
120: line input terminal
130: AD converter
140: first control unit
150: first communication unit
160: First Ethernet communication terminal
170: first serial communication terminal
200: sound receiving module
210: second Ethernet communication terminal
220: second communication unit
230: second control unit
231: listening port
232: receive buffer
233 volume control
234: synthesizer
235 play buffer
240: DA converter
250: line output terminal
260: second serial communication terminal
300: hub module
400: control PC

Claims (7)

A plurality of sound transmission modules provided at each output terminal of the plurality of sound input devices;
A plurality of sound receiving modules provided at each of input terminals of the plurality of sound output devices;
A hub module connected between the plurality of sound transmitting modules and the plurality of sound receiving modules to configure an audio over IP network to output sounds input from the plurality of sound input devices to the plurality of sound output devices;
A control PC that performs user settings for the AoIP network configured by the hub module;
In the AoIP-based on-site acoustic center system comprising,
The sound receiving module is:
A second Ethernet communication terminal receiving digital sound data from the hub module;
A second communication unit which receives digital sound data input through a second Ethernet communication terminal;
A second controller for synthesizing and outputting digital sound data received by the second communication unit;
A DA converter for converting AoIP-based digital sound data synthesized and output by the second controller into an analog sound signal;
A line output terminal for outputting an analog sound signal converted by the DA converter to a line level sound output device;
Including,
The second control unit:
A plurality of receiving ports for receiving each of the digital sound data from the second communication unit;
A plurality of receive buffers for storing digital acoustic data received by each of the plurality of receive ports;
A volume adjusting unit adjusting a volume of each of the digital sound data stored in each of the plurality of reception buffers;
A synthesizer for synthesizing each digital sound data volume adjusted by the volume adjusting unit and outputting AoIP-based digital sound data;
A playback buffer for temporarily storing AoIP based digital sound data synthesized by the synthesizer;
AoIP based on-site acoustic center system. delete The method of claim 1,
Acoustic receiving module:
A second serial communication terminal receiving digital sound data from the hub module in a serial communication method;
AoIP-based on-site acoustic center system further comprising. The method of claim 1,
The second control unit:
An AoIP based on-site acoustic center system for controlling digital synthesizer data transmitted from each of the connected multicast IPs through a synthesizer when there are two or more connected multicast IPs. The method according to claim 1 or 3 or 4,
Sound transmission module:
A microphone input terminal for microphone connection;
A line input terminal for connecting a line level sound input device;
An AD converter for converting an analog sound signal input through a microphone input terminal or a line input terminal into digital sound data;
A first controller which performs transmission control of the digital sound data converted by the AD converter;
A first communication unit for transmitting digital sound data based on AoIP;
A first Ethernet communication terminal for outputting digital sound data transmitted through the first communication unit to the hub module;
AoIP based on-site acoustic center system. The method of claim 5,
Sound transmission module:
A first serial communication terminal for connecting a serial communication audio device;
AoIP-based on-site acoustic center system further comprising. The method of claim 5,
The first control unit:
AoIP-based on-site acoustic center system that transmits digital sound data by designating its own IP as a multicast IP.

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