KR101242516B1 - System and method for broadcasting audio signal - Google Patents

Abstract

PURPOSE: An audio signal broadcasting system and a method thereof are provided to broadcast an audio signal. CONSTITUTION: An audio signal receiver(131) is connected to one or more multimedia devices. The audio signal receiver receives an audio signal from the multimedia device. A network information obtaining unit(132) obtains network information from one or more first client terminals which receive the audio signal. An audio signal broadcasting unit(133) broadcasts the audio signal to one or more second client terminals which communicate with the first client. The audio signal broadcasting unit broadcasts the audio signal related to images outputted by the multimedia device. [Reference numerals] (110) First client terminal; (120) Second client terminal; (131) Audio signal receiver; (132) Network information acquisition unit; (133) Audio signal broadcasting unit; (134) First power unit; (135) First main control unit

Description

System and method for broadcasting audio signal

The present invention relates to a system and method for broadcasting an audio signal. More particularly, the present invention relates to a system and method for broadcasting an audio signal output from a multimedia apparatus.

Due to various background noises, it is very difficult to watch TV properly in public. In addition, even if you do not want to watch TV, there is a inconvenience to listen to the multimedia sound output from the TV. Thus, conventionally, when a TV is turned on in a public place, the voice is replaced with subtitles or only the image is shown with the sound turned off. However, in this case, it is inconvenient to not watch the video properly due to the subtitles, and it is difficult to understand the contents because only the video is watched without a voice. In this case, satisfactory viewing is also impossible.

In order to solve this problem, a system for transmitting sound wirelessly has been proposed. An example of such a system is an earphone jack installed on each seat of a KTX or highway bus. This system can listen to the sound without inconvenience to others, but there is a problem in that the cost of building the system increases because the terminal must be installed in each seat.

The present invention has been made to solve the above problems, and an object of the present invention is to propose a system and method for broadcasting an audio signal.

The present invention has been made in order to achieve the above object, an audio signal receiving unit connected to at least one multimedia device and receiving an audio signal from the multimedia device; A network information obtaining unit obtaining network information from at least one first client terminal to receive the audio signal; And an audio signal broadcaster configured to broadcast the audio signal to the first client terminal and at least one second client terminal that can be networked.

Preferably, the audio signal broadcast unit is networked with the first client terminal and the second client terminal using a wireless repeater. More preferably, the first client terminal may include: a wireless repeater search unit searching for an accessible wireless repeater whenever there is a position change; And a wireless repeater selector configured to select the first wireless repeater based on the signal strength value when there are at least two searched wireless repeaters. Even more preferably, the wireless repeater selecting unit may include a signal strength measuring unit measuring the signal strength value for each of the found wireless repeaters; And a measurement result based selection unit selecting the wireless repeater having the largest signal strength value as the first wireless repeater based on the signal strength value.

Preferably, the audio signal broadcaster broadcasts an audio signal related to an image output by the multimedia apparatus as the audio signal. More preferably, the first client terminal comprises: a wireless repeater searching unit searching for a wireless repeater accessible when the audio signal does not match the video; A matching determination unit determining whether an audio signal received through the found wireless repeater matches the image; And a wireless repeater selection unit that continues the search until an audio signal matching the image is received.

Preferably, the network information obtaining unit obtains the network information from the first client terminal when the string information transmitted to the first client terminal and the string information included in the first client terminal match.

Preferably, the audio signal receiving unit, the network information obtaining unit, and the audio signal broadcasting unit are provided in a portable terminal having guaranteed mobility by performing a server function.

The present invention also provides an audio signal generator for generating an audio signal to be transmitted; A network information obtaining unit obtaining network information from at least one first client terminal to receive the audio signal; And an audio signal broadcaster configured to broadcast the audio signal to the first client terminal and at least one second client terminal that can be networked.

The present invention also provides an audio signal receiving step of receiving an audio signal from the multimedia device when connected to at least one multimedia device; Acquiring network information from at least one first client terminal to receive the audio signal; And an audio signal broadcasting step of broadcasting the audio signal to the first client terminal and at least one networkable second client terminal.

Preferably, the audio signal broadcasting step is a wireless network that is networked with the first client terminal and the second client terminal using a wireless repeater, and searching for a wireless repeater accessible whenever there is a change in position of the first client terminal. Repeater discovery step; And selecting a first wireless repeater based on the signal strength value when there are at least two searched wireless repeaters. The searching for the wireless repeater and the selecting of the wireless repeater may be performed between the network information obtaining step and the audio signal broadcasting step. More preferably, the step of selecting a wireless repeater comprises: a signal strength measuring step of measuring the signal strength value for each found wireless repeater; And a measurement result based selection step of selecting the wireless repeater having the largest signal strength value as the first wireless repeater based on the signal strength value.

Preferably, the audio signal broadcasting step broadcasts an audio signal related to an image output by the multimedia apparatus as the audio signal, and searches for a wireless repeater accessible when the audio signal does not match the image. Search step; A matching step of determining whether or not the audio signal received through the found wireless repeater matches the image; And selecting the wireless repeater to continue the search until an audio signal matching the image is received. The searching for the wireless repeater, the matching determination step and the selecting the wireless repeater may be performed between the network information acquiring step and the audio signal broadcasting step.

The present invention also provides an audio signal generating step of generating an audio signal to be transmitted; Acquiring network information from at least one first client terminal to receive the audio signal; And an audio signal broadcasting step of broadcasting the audio signal to the first client terminal and at least one networkable second client terminal.

The present invention can achieve the following effects by broadcasting an audio signal. First, multicasting a single sound to many allows multiple people to hear it at the same time, reducing the cost of building a system. Second, since it uses a wireless repeater such as an access point (AP), real-time multicasting is possible, and the inconvenience caused by the mismatch between video and voice can be eliminated.

1 is a block diagram schematically showing an audio signal broadcasting system according to a preferred embodiment of the present invention.
FIG. 2 is a block diagram schematically illustrating a configuration added to the audio signal broadcasting system of FIG. 1.
3 is a block diagram schematically illustrating an audio signal broadcasting system according to another exemplary embodiment of the present invention.
4 is a diagram illustrating an embodiment of an audio signal broadcasting system of FIG. 1.
5 is an exemplary diagram of driving a wireless multicast system.
6 is an exemplary view of driving a server module.
7 is an exemplary view of driving a client terminal.
8 is a reference diagram for describing a method of automatically changing an AP by measuring an AP signal strength.
9 is a flowchart illustrating an audio signal broadcasting method according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to designate the same or similar components throughout the drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the preferred embodiments of the present invention will be described below, but it is needless to say that the technical idea of the present invention is not limited thereto and can be variously modified by those skilled in the art.

1 is a block diagram schematically showing an audio signal broadcasting system according to a preferred embodiment of the present invention. FIG. 2 is a block diagram schematically illustrating a configuration added to the audio signal broadcasting system of FIG. 1. The following description refers to FIGS. 1 and 2.

According to FIG. 1, the audio signal broadcasting system 100 according to the first embodiment includes a first client terminal 110, a second client terminal 120, and a server terminal 130. The first client terminal 110 is a terminal to receive an audio signal, and is provided with at least one. The second client terminal 120 is a networkable terminal, and is provided with at least one. The first client terminal 110 and the second client terminal 120 is configured to be networking with the server terminal 130. For example, the three terminals 110 to 130 are configured to be networkable through a wireless repeater such as an access point (AP). The server terminal 130 is a terminal that performs a server function, and may be implemented as a mobile terminal having guaranteed mobility, such as the first client terminal 110 or the second client terminal 120. However, the server terminal 130 is not limited thereto, and may be implemented as a general server. The server terminal 130 and the client terminals 110 and 120 may each perform a server function and a client function through a server program and a client program.

The server terminal 130 includes an audio signal receiving unit 131, a network information obtaining unit 132, an audio signal broadcasting unit 133, a first power supply unit 134, and a first main control unit 135. The audio signal receiver 131 is connected to at least one multimedia device and performs a function of receiving an audio signal from the multimedia device. In the above description, a multimedia device refers to a device that plays various multimedia files. The network information acquisition unit 132 performs a function of obtaining network information from at least one first client terminal. The network information obtaining unit 132 obtains network information from the first client terminal 110 when the string information transmitted to the first client terminal 110 and the string information of the first client terminal 110 coincide with each other. . The server terminal 130 may acquire network information of the first client terminal 110 using a transmission control protocol (TCP) to increase the accuracy of data reception. On the other hand, the server terminal 130 may transmit an audio signal to the first client terminal 110 using the User Datagram Protocol (UDP) for real-time transmission of data. The audio signal broadcast unit 133 performs a function of broadcasting an audio signal to at least one first client terminal and at least one second client terminal. The audio signal broadcasting unit 133 broadcasts an audio signal related to an image output by the multimedia apparatus as an audio signal. The audio signal broadcast unit 133 is networked with the first client terminal 110 and the second client terminal 120 using a wireless repeater. In this embodiment, the wireless repeater includes, for example, an access point (AP). The first power supply unit 134 performs a function of supplying power to each component constituting the server terminal 130. The first main controller 135 performs a function of controlling the overall operation of each component of the server terminal 130.

The first client terminal 110 includes a wireless repeater searcher 111, a wireless repeater selector 112, a second power supply 113 and a second main controller 114 as shown in FIG. do. The wireless repeater search unit 111 performs a function of searching for an accessible wireless repeater whenever there is a change in position of the first client terminal 110. The wireless repeater selector 112 selects the first wireless repeater based on the signal strength value when there are at least two searched wireless repeaters. The wireless repeater selecting unit 112 selects the wireless repeater when there is one searched wireless repeater. The wireless repeater selector 112 includes a signal strength measurer 115 and a measurement result based selector 116 as shown in FIG. 2 (b). The signal strength measuring unit 115 measures a signal strength value for each of the found wireless repeaters. The measurement result based selector 116 selects the wireless repeater having the largest signal strength as the first wireless repeater. The second power supply 113 performs a function of supplying power to each component constituting the first client terminal 110. The second main control unit 114 performs a function of controlling the overall operation of each component of the first client terminal 110.

Meanwhile, the first client terminal 110 may further include a match determination unit 117 according to the configuration of FIG. 2 (a). In this case, the wireless repeater searching unit 111 and the wireless repeater selecting unit 112 perform the following functions, respectively. The wireless repeater search unit 111 performs a function of searching for an accessible wireless repeater when the audio signal does not match the image. The match determination unit 117 determines whether the audio signal received through the found wireless repeater matches the image. The wireless repeater selector 112 continues searching for the wireless repeater until an audio signal matching the image is received. The matching determination unit 117 may also perform a function of determining whether the audio signal matches the image before performing the wireless repeater search, but another matching determination unit may perform this function.

The server terminal 130 described above is connected to at least one multimedia device. However, the multimedia device itself may be a server terminal. The structure described below is a structure in consideration of this case. 3 is a block diagram schematically illustrating an audio signal broadcasting system according to another exemplary embodiment of the present invention.

The audio signal broadcasting system 200 according to the second embodiment includes a first client terminal 110, a second client terminal 120, and a server terminal 230. In order to distinguish between the server terminal of 130 and the server terminal of 230, the first server terminal 130 and the second server terminal 230 will be referred to below.

The second server terminal 230 includes an audio signal generating unit 231, a network information obtaining unit 132, an audio signal broadcasting unit 133, a first power supply unit 134, and a first main control unit 135. The audio signal generator 231 performs a function of generating an audio signal to be transmitted. The network information acquirer 132 performs a function of obtaining network information from at least one first client terminal to receive an audio signal. The audio signal broadcast unit 133 performs a function of broadcasting an audio signal to at least one second client terminal that can be networked with the first client terminal. The second server terminal 230 is different from the first server terminal 130 in that it includes an audio signal generator 231 instead of the audio signal receiver 131, and the system shown in FIGS. 1 and 2. The configurations are applicable to the system configuration of FIG. 3.

Next, an embodiment of the above-described system will be described with reference to FIGS. 1 to 3. 4 is a diagram illustrating an embodiment of an audio signal broadcasting system of FIG. 1. According to FIG. 4, the wireless multicast system 400 includes a multimedia device 410 having a sound output terminal, a sound transmission cable 420, a server module 430 serving as a server, and a network. It is composed of an access point (440) to build, and a client terminal (Client) 450, which is a personal mobile communication terminal to operate as a client.

The wireless multicast system 400 is a system for performing wireless multicast transmission for the multimedia device 410. The wireless multicast system 400 transmits an audio signal from the multimedia apparatus 410 to the server module 430, and the server module 430 multicasts the audio signal to the client terminal 450 wirelessly through WIFI. In addition, the wireless multicast system 400 is a system for automatically changing the AP 440 by measuring the signal strength of the AP (440). In the wireless multicast system 400, when a plurality of multimedia devices 410 exist, the client terminal 450 automatically generates the most signal strength in the surroundings according to the signal strength of the AP 440 to which each device 410 belongs. Is connected to a large AP 440 to listen to the sound of the multimedia device 410 belonging to it. The characteristics of the wireless multicast system 400 can be compressed into four types as follows. First, use WIFI. Second, it is specialized in audio. Third, it supports 1 (server): N (client). Fourth, complete modularity is possible. As described above, there are four different characteristics that differ from the prior art. First, it uses WIFI, which is faster than Bluetooth, takes less time to connect to the server, and has a wider range of connections. It is also specialized in audio and broadcasting to multiple clients is possible at the same time. Lastly, when this product is fully implemented, it is portable because it can broadcast TV sound with only one module.

5 is an exemplary diagram of driving a wireless multicast system. 5 illustrates a flow chart of an audio signal, in which an audio signal is first generated by the multimedia apparatus 410 (S510). The multimedia device 410 includes a TV, a radio, an MP3, and the like. The generated audio signal is transmitted to the server module 430 through a cable line 420 connecting the multimedia apparatus 410 and the server module 430 (S520), and the server module 430 converts the audio signal into a digital signal. The conversion process is transmitted to the AP 440 (S530). The audio signal is transmitted to the client terminal 450 via the AP 440 (S540), and reproduced in the client terminal 450 so that the user can listen to the audio signal.

Hereinafter, the example of FIG. 5 will be described in detail. The ConnectToServerThread of the client terminal 450 sends the client IP to AddClientThread of the server module 430. The ConnectionThread establishes a TCP connection via AddClientThread and 3-way handshaking and sends a specific string to AddClientThread. AddClientThread of the server module 430 receives the client IP from the ConnectToServerThread of the client terminal 450 and sends the client IP to SendAudioThread of the server module 430. AddClientThread sends a client's IP to SendAudioThread after verifying that a specific string matches its string. The reason why the TCP is used is that packet loss may occur when UDP is used. If a client terminal 450 is not registered in the server module 430, a serious error may occur that requires the application of the client terminal 450 to be turned on again. Because there is. In addition, the reason for checking by sending a specific string is to prevent waste of unnecessary resources when the wrong application is registered in the server module 430. SendAudioThread of the server module 430 receives the client IP from AddClientThread of the server module 430 and adds it to the list. AddClientThread sends the client IP as a vector storing the Client IP, and adds the IP in Vector <InetAddress>. SendAudioThread transmits an audio packet to the client terminal 450 using the client IP stored in the vector. In Vector <InetAddress>, InetAddress is a format for IPv4 (ex> 192.168.0.3) and vector is a useful container for automatically allocating and freeing memory. And Vector <InetAddress> is declared global to allow simultaneous access from AddClientThread and SendAudioThread.

The multimedia device 410 plays the audio itself and sends it to the MIC. The MIC receives an audio signal from the multimedia device 410 and sends an audio signal to SendAudioThread of the server module 430. SendAudioThread of the server module 430 receives an audio signal from the MIC and sends it to PlayAudioThread of the client terminal 450. SendAudioThread creates and transmits an audio packet to PlayAudioThread. SendAudioThread sends an audio packet to PlayAudioThread using UDP. The reason for this is that UDP packets can cause loss but are fast. Moderate loss is acceptable to some extent, but delay is unacceptable and is desirable for transmitting audio packets. The PlayAudioThread of the client terminal 450 receives the audio packet from SendAudioThread of the server module 430 and sends the audio packet to the SPEAKER so that it can be played back. Speaker receives and outputs audio signal.

The AP 440 bundles devices in range into a network. The ConnectToApThread of the client terminal 450 receives a list of currently accessible APs. Thereafter, the AP to be accessed is found from the list of accessible APs. After that, the AP having a strong signal strength is found among the APs to be connected. After that, the connection is made. There is wifimanager in ConnectToApThread and wifimanager gets signal strength and SSID from AP and connects to AP with higher signal strength. Wifimanager can get the information of the AP and access the AP.

6 is an exemplary view of driving a server module. First, an audio signal of the multimedia apparatus 410 is received through a cable 420 connecting the multimedia apparatus 410 and the server module 430 (S610). Thereafter, the received audio signal is split into a predetermined size (S620). Thereafter, the sampled audio signal is made into a 16-bit PCM file (S630). Thereafter, a UDP header is added to the PCM worked above to transmit the packet through the UDP protocol (S640). Thereafter, the created UDP packet is transmitted to the AP (S650).

7 is an exemplary view of driving a client terminal. First, the packet created and transmitted by the server module 430 is received by the client terminal 450 via the AP 440 (S710). Thereafter, the UDP header which is not necessary to use the PCM in the received packet is removed (S720). Thereafter, the processed PCM is reproduced (S730).

8 is a reference diagram for describing a method of automatically changing an AP by measuring an AP signal strength. Usually, the multimedia device 410 transmits an audio signal to the server module 430, and the server module 430 multicasts the audio signal to the client terminal 450 wirelessly through WIFI. 8A illustrates a state where the client terminal 450 receives an audio signal from the first system 810. If the client terminal 450 is moved as shown in FIG. 8 (b), the client terminal 450 is on the coverage of both the first system 810 and the second system 820, but the first system 810 is moved. Since the signal strength of AP1 811 is stronger, the audio signal is continuously transmitted from the first system 810. Then, when the client terminal 450 moves as shown in FIG. 8 (c), the client terminal 450 automatically moves to a region where the signal strength of AP2 821 of the second system 820 is stronger. It is connected to the second system 820 to receive an audio signal from the second system 820.

The wireless multicast system 400 described above can obtain the following effects. First, it wirelessly multicasts sound using WIFI. Therefore, it is not expensive to build a system if there is a module that can be easily connected to a multimedia device. In addition, even if the terminal does not have a function such as DMB or radio can be used when there is a multimedia device around. Second, when there is a multimedia device connected to a module in the vicinity, the AP may be automatically changed by using the signal strength. Third, only users who want to listen to the sound of multimedia devices in public places do not have a problem such as noise generation. Sound from multimedia devices can reduce the number of people disturbed in public. Fourth, since the sound can be heard by the personal mobile communication terminal, it is possible to solve the problem that the sound is not properly heard due to ambient noise. Fifth, you can spend less time waiting for someone or eating alone at a restaurant. Since the wireless multicast system 400 is a simple and useful system, it is likely to be widely used in public places such as restaurants, bus terminals, and train stations. In addition, it can be used when a person who wants to watch and a person who do not want to coexist in the home because of the difference in the preference of the TV.

Next, an audio signal broadcasting method using the audio signal broadcasting system of FIGS. 1 to 3 will be described. 9 is a flowchart illustrating an audio signal broadcasting method according to an exemplary embodiment of the present invention. The following description refers to FIG. 9.

First, when connected to at least one multimedia device, the server terminal 130 receives an audio signal from the multimedia device (audio signal receiving step, S10).

After the audio signal receiving step S10, the server terminal 130 obtains network information from at least one first client terminal to receive the audio signal (network information obtaining step, S20).

After the network information acquisition step S20, the first client terminal 110 searches for an accessible wireless repeater whenever there is a position change (wireless repeater search step S30).

After the wireless repeater search step S30, when the first client terminal 110 has at least two wireless repeaters found, the first client repeats the first wireless repeater based on the signal strength value (the wireless repeater selection step S40). Wireless repeater selection step (S40) may be embodied as follows. First, a signal strength value is measured for each found wireless repeater (signal strength measuring step). Then, the wireless repeater having the largest signal strength value is selected as the first wireless repeater based on the signal strength value (a measurement result based selection step).

After the wireless repeater selection step S40, the server terminal 130 broadcasts an audio signal to the first client terminal and at least one second client terminal that can be networked (audio signal broadcasting step S50). The server terminal 130 is networked with the first client terminal and the second client terminal using a wireless repeater.

As an audio signal, an audio signal related to an image output by the multimedia apparatus may be broadcast. In this case, the wireless repeater searching step searches for an accessible wireless repeater when the audio signal does not match the image. In the wireless repeater selection step, the wireless repeater search is continued until an audio signal matching the image is received. A match determination step may be performed between the wireless repeater search step and the wireless repeater selection step. In the match determination step, it is determined whether the audio signal received through the found wireless repeater matches the image.

9 illustrates a case where the multimedia apparatus and the server terminal 130 are separate. In the present embodiment, the multimedia device itself may be the server terminal 130. In consideration of this, the audio signal broadcasting method may be performed as follows. First, an audio signal to be transmitted is generated (audio signal generation step). Thereafter, network information is obtained from at least one first client terminal to receive an audio signal (network information obtaining step). Thereafter, an audio signal is broadcasted to the first client terminal and at least one second client terminal capable of networking (audio signal broadcasting step).

The method proposed through FIG. 9 can be used wherever there are multimedia devices such as a general home as well as a public place where a lot of people gather, such as a bus terminal, a train station, and a restaurant. The effect of this is to wait for a certain time in a place, to eat at a restaurant, etc., so that you can listen to the sound of the multimedia devices of your surroundings on your personal handheld device, so you can spend time without being bored. You can get the effect of not disturbing. In addition, the automatic AP change mode enables multiple multimedia devices around and when the user moves with a portable mobile device, the device automatically measures the AP device strength by measuring AP signal strength. It is received. This can provide convenience to the user by providing a sound according to the user's location.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: audio signal broadcasting system according to the first embodiment
110: first client terminal 111: wireless repeater search unit
112: wireless repeater selection unit 115: signal strength measurement unit
116: measurement result based selection unit 117: matching determination unit
120: second client terminal 130: first server terminal
131: audio signal receiver 132: network information acquisition unit
133: audio signal broadcasting unit
200: audio signal broadcasting system according to the second embodiment
230: second server terminal 231: audio signal generating unit

Claims (14)

An audio signal receiver connected to at least one multimedia device and receiving an audio signal from the multimedia device;
A network information obtaining unit obtaining network information from at least one first client terminal to receive the audio signal; And
An audio signal that broadcasts the audio signal to the first client terminal and at least one second client terminal capable of networking, and broadcasts an audio signal related to an image output by the multimedia device as the audio signal Broadcasting Department
Audio signal broadcasting system comprising a. The method of claim 1,
The audio signal broadcasting system is networked with the first client terminal and the second client terminal using a wireless repeater. The method of claim 2,
The first client terminal,
A wireless repeater searching unit searching for an accessible wireless repeater whenever there is a position change; And
Wireless repeater selection unit for selecting the first wireless repeater based on the signal strength value when there are at least two wireless repeaters found
Audio signal broadcasting system comprising a. The method of claim 3, wherein
The wireless repeater selection unit,
A signal strength measuring unit for measuring the signal strength value for each found wireless repeater; And
A measurement result based selection unit for selecting the wireless repeater having the largest signal strength value as the first wireless repeater based on the signal strength value
Audio signal broadcasting system comprising a. delete The method of claim 1,
The first client terminal,
A wireless repeater search unit searching for an accessible wireless repeater when the audio signal does not match the video;
A matching determination unit determining whether an audio signal received through the found wireless repeater matches the image; And
Wireless repeater selection unit to continue the search until the audio signal matching the image is received
Audio signal broadcasting system comprising a. The method of claim 1,
The network information obtaining unit obtains the network information from the first client terminal when the string information transmitted to the first client terminal and the string information included in the first client terminal match. . The method of claim 1,
And the audio signal receiver, the network information acquirer, and the audio signal broadcaster are provided in a portable terminal which performs mobility as a server. An audio signal generator for generating an audio signal to be transmitted;
A network information obtaining unit obtaining network information from at least one first client terminal to receive the audio signal; And
An audio signal that broadcasts the audio signal to the first client terminal and at least one second client terminal capable of networking, and broadcasts an audio signal related to an image output by the multimedia device as the audio signal Broadcasting department
Audio signal broadcasting system comprising a. An audio signal receiving step of receiving an audio signal from the multimedia device when connected to at least one multimedia device;
Acquiring network information from at least one first client terminal to receive the audio signal; And
An audio signal that broadcasts the audio signal to the first client terminal and at least one second client terminal capable of networking, and broadcasts an audio signal related to an image output by the multimedia device as the audio signal Broadcast stage
Audio signal broadcasting method comprising a. 11. The method of claim 10,
The audio signal broadcasting step is networked with the first client terminal and the second client terminal using a wireless repeater,
A wireless repeater searching step of searching for an accessible wireless repeater whenever there is a change in position of the first client terminal; And
Selecting a first wireless repeater based on a signal strength value when there are at least two searched wireless repeaters
The audio signal broadcasting method further comprising. The method of claim 11,
The wireless repeater selection step,
A signal strength measuring step of measuring the signal strength value for each found wireless repeater; And
A measurement result based selection step of selecting the wireless repeater having the largest signal strength value as the first wireless repeater based on the signal strength value
Audio signal broadcasting method comprising a. 11. The method of claim 10,
The audio signal broadcasting step broadcasts an audio signal related to an image output by the multimedia apparatus as the audio signal,
Searching for a wireless repeater accessible when the audio signal does not match the video;
A matching step of determining whether or not the audio signal received through the found wireless repeater matches the image; And
Selecting a wireless repeater to continue the search until an audio signal matching the image is received
The audio signal broadcasting method further comprising. Generating an audio signal for transmission;
Acquiring network information from at least one first client terminal to receive the audio signal; And
An audio signal that broadcasts the audio signal to the first client terminal and at least one second client terminal capable of networking, and broadcasts an audio signal related to an image output by the multimedia device as the audio signal Broadcast stage
Audio signal broadcasting method comprising a.

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