KR20050044881A - Grid speaker system and audio processing method in the same - Google Patents

Abstract

The present invention relates to a lattice speaker system and a sound processing method in the system. The grid speaker system includes a plurality of individual sound processing units each including a speaker for outputting sound to the outside; And a plurality of individual sound processing units connected to each other wirelessly or by wire, respectively, to independently drive and control the speakers of the plurality of individual sound processing units, and select the individual sound processing unit to output the sound according to the playback file from among the plurality of individual sound processing units. It includes a main sound processor for controlling to reproduce the sound output. Here, the plurality of speakers each included in the plurality of individual sound processing units is characterized in that arranged in a grid. Alternatively, the plurality of individual sound processors measure the position and distance to the user, respectively, and output them to the main sound processor, and the main sound processor is based on the distance information to the user, respectively measured by the plurality of individual sound processors. It is characterized by controlling the reproduction operation in the sound processor. According to the present invention, it is possible to provide sound mixing effects and spatial transition effects by independently using a plurality of sound sources, and to automatically generate sweet spots by changing the position of sound reproduction according to the movement of the user. I can adjust it.

Description

GRID SPEAKER SYSTEM AND AUDIO PROCESSING METHOD IN THE SAME}

TECHNICAL FIELD The present invention relates to a speaker system, and more particularly, to a grid speaker system for providing various sounds using a plurality of speakers arranged in a grid, and a sound processing method in the system.

Recently, when people play a game or watch a movie, they often feel that they are immersed in the content in a realistic situation. This realism is made possible due to many advances in 3D imaging technology or video special effects. However, the effect of the video alone does not enhance the realism. Listening is no less important than seeing, and there have been many advances in the sound technology until recently.

Stereo sound is what we hear to arouse the sense of space. For example, in the game, gunshots can be heard from afar or near, giving the user the feeling of being in a war field, with a surround effect that surrounds the left and right in a movie, as well as a surround effect. It also makes people feel as if they are in the movie screen, which is limited by dimensions.

This stereo sound is a very important factor to overcome the limitations of the image. Various speaker systems are needed to provide this acoustic effect.

The general principle of stereo is to simply turn up and down the volume by separating the left and right sounds. For example, the sound that a car passes from right to left is to increase the volume on the right and then to the right to decrease the volume on the left and to increase the volume on the left. Dolby Stereo is a system that can express the front and rear sound mobility that the stereo could not express. Dolby Stereo is a four-channel system consisting of two front speakers, a center speaker and a surround (rear) speaker. In this stereophonic sound, the separation of sounds is very important. The higher the separation (dB), the more three-dimensional sound comes out.

Stereophonic sound is related to spatial cues, and spatial cues are expressed by the time difference between sounds reaching two ears (ITD). The reason that a person can recognize the direction of the sound source is because there is a time difference between the sounds coming from both ears, so the ear in the near direction first hears the sound to determine the direction of the sound source. Another clue that a person can feel the location of the sound source is the difference in the intensity of the sound reaching the two ears, through which the location and distance of the sound can be known.

Two important concepts related to the method of generating stereophonic sound are the head transfer function and the space transfer function. Head-Related Transfer Function (HTRF) is a Fourier-transformed recording of notes from speakers placed at various angles using a fake head in an anechoic chamber. Because it depends on, we measure the head transfer function for notes coming from different locations and build it into a database. The room transfer function (RTF) changes the direct sound, the initial reflection sound, the reverberation pattern, and the reverberation time for the sound source according to the size, structure, wall, or ceiling material of the room according to a specific place. In order to create the effect of a specific place, the hair transfer function must be measured in a specific room, not in an anechoic chamber, and the hair transfer function measured in a specific place is called a space transfer function.

The digital technology used to record and play sound requires the assistance of a computer. In order to process in computer, the sound input part converts to digital signal by using ADC (Analog-to-Digital Converter), performs various digital signal processing to process stereo sound, and then outputs sound to hear sound again. In the part, it outputs using DAC (Digital-to-Analog Converter).

Existing technologies for generating and outputting stereo sound and stereoscopic sound output the sound recorded in a special way using two or a limited number of speakers mainly by adjusting the time difference and intensity of the sound signal by digital signal processing technology. Is taking. This simulates the way a person hears a three-dimensional sound in the real world, and thus there is a limit to the reproduction of the perfect realistic sound that is natural to the human ear.

Accordingly, an object of the present invention, by generating a plurality of independent sound sources using a plurality of speakers arranged in a lattice grid type that can provide various types of stereoscopic effects, multiple sound source mixing effects and sound effects based on the user's location The present invention provides a speaker system and a sound processing method in the system.

Speaker system according to the characteristics of the present invention to achieve the above object,

A plurality of individual sound processing units each including a speaker for outputting sound to the outside; And a plurality of individual sound processing units connected to the plurality of individual sound processing units wirelessly or by wire, respectively, to independently drive and control the speakers of the plurality of individual sound processing units, and to select an individual sound processing unit to output sound according to a playback file. It includes a main sound processor for controlling to output the sound by playing the playback file.

Here, the plurality of speakers each included in the plurality of individual sound processing units is characterized in that arranged in a grid.

The plurality of individual sound processing units may be operated in synchronization with the main sound processing unit, respectively, in time.

The plurality of individual sound processing units respectively measure the position of the user and the distance from the sound source and output to the main sound processing unit,

The main sound processor may control reproduction operations of the plurality of individual sound processors based on distance information measured by the plurality of individual sound processors, respectively.

A sound processing method in a speaker system according to another aspect of the present invention,

a) selecting an individual sound processor to control playback according to a file to be reproduced among a plurality of individual sound processors each including a speaker capable of outputting sound; And b) the main sound processor controlling the plurality of individual sound processors respectively controlling the selected individual sound processors so that the file reproduction is performed independently.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention. Like parts are designated by like reference numerals throughout the specification.

Hereinafter, a grid speaker system according to an exemplary embodiment of the present invention will be described in detail.

1 is a schematic block diagram of a grid speaker system according to a first embodiment of the present invention.

As shown in FIG. 1, the grid speaker system according to the first exemplary embodiment of the present invention may include a plurality of individual sound processors 100-1, 100-2,..., 100 -N and a main sound processor 200. Include.

The individual sound processing units 100-1, 100-2, ..., 100-N each constitute each module of the lattice speaker system, and individually reproduce or generate sound and output the sound. In this case, the individual sound processing units 100-1, 100-2,..., 100 -N and the main sound processing unit 200 may be connected by wires or wirelessly, respectively. Explain that it has been done.

In addition, the individual sound processing units 100-1, 100-2,..., 100 -N each form one module, as shown in the accompanying FIG. 5, and the lattice so that these modules can form a digital wall surface. Is placed in the mold. (A) of FIG. 5 shows the form when it sees from the front, and b) shows the form when it sees from the side.

On the other hand, the main sound processing unit 200 is connected to the outside through a network such as the Internet to download music files, etc. from an external server, or the individual sound processing unit 100-1 to the music files stored in an external storage medium or internal storage device, etc. , 100-2, ..., 100-N), and also performs a synchronization algorithm so that the individual sound processing units 100-1, 100-2, ..., 100-N can be synchronized with each other for sound processing.

2 is a diagram illustrating an example of the individual sound processor 100 -N shown in FIG. 1 according to the first embodiment of the present invention.

As shown in FIG. 2, the individual sound processor 100 -N according to the first exemplary embodiment of the present invention includes a wireless interface unit 110 -N, a storage unit 120 -N, and a synchronization unit 130 -N. , A sound control unit 140 -N, and a speaker 150 -N.

The wireless interface unit 110 -N allows the individual sound processing unit 100 -N to exchange information with the main sound processing unit 200 through wireless communication. The wireless interface unit 110 -N may be a wireless LAN, Bluetooth, or the like.

The storage unit 120 -N includes various programs, data, and the like for processing by the individual sound processor 100 -N, various files transmitted from the main sound processor 200 through the wireless interface unit 110 -N, Receive and store sound data.

The synchronization unit 130 -N allows the individual sound processing unit 100 -N to be synchronized with the main sound processing unit 200 in time to enable individual control of the individual sound processing units 100 -N as well as collective control. To this end, the synchronization unit 130 -N operates to maintain the time of the individual sound processing unit 100 -N at the same time as the main sound processing unit 200.

The sound control unit 140 -N is connected to the air interface unit 110 -N, the storage unit 120 -N, and the synchronization unit 140 -N, and is controlled by the individual sound processing unit 100 under the control of the main sound processing unit 200. -N) performs overall control to perform the individual sound processing operations. The sound control unit 140 -N plays a file stored in the storage unit 120 -N to output sound through the speaker 150 -N, and other individual sound processing units by referring to the synchronization unit 130 -N. It can be synchronized with the controller to generate various stereo sound effects.

Although only the configuration of one individual sound processing unit 100 -N has been described above, the other individual sound processing units 100-1, 100-2,..., 100 -N-1 are also described above. It can be configured similarly to N).

3 is a diagram illustrating an example of the main sound processor 200 shown in FIG. 1 according to the first embodiment of the present invention.

As shown in FIG. 3, the main sound processor 200 according to the first embodiment of the present invention may include a media interface unit 210, a main storage unit 220, a wireless interface unit 230, and a main sound control unit 240. ).

The media interface unit 210 provides an interface that allows the main sound processor 200 to be connected to an external server through a network such as the Internet, and to allow access to storage media such as CD, DVD, FDD, and the like. do.

The main storage unit 220 stores various programs, data, etc. used by the main sound control unit 240 to control the main sound processing unit 200, and also includes a music file transmitted from the outside through the media interface unit 210. Save it.

The wireless interface unit 230 enables the main sound processing unit 200 to exchange information through wireless communication with the individual sound processing units 100 -N. The wireless interface unit 230 may be a wireless LAN, Bluetooth (Bluetooth) and the like.

The main sound control unit 240 controls the media interface unit 210, the main storage unit 220, and the wireless interface unit 230, so that music files or sounds downloaded from the outside or stored therein are stored in the individual sound processing unit 100. -1, 100-2, ..., 100-N) to control a speaker system having various stereoscopic sound effects independently or collectively.

On the other hand, the main sound processing unit 200 must synchronize with each other in time so that the individual sound processing unit (100-1, 100-2, ..., 100-N) can reproduce a variety of sounds by performing a consistent sound processing. To this end, the main sound processor 200 and the individual sound processors 100-1, 100-2, ..., 100-N use NTP (Network Time Portocol). This NTP is used to synchronize the time of a computer client or server to another server or to a reference time source or modem, such as a radio or satellite receiver, in relation to a primary server synchronized to Coordinated Universal Time (UTC). However, NTP typically provides client accuracy of less than 1 ms over LAN and less than 10 ms over WAN.

Meanwhile, although the main sound processor 200 is described as being configured independently from the individual sound processors 100-1, 100-2, ..., 100-N, the technical scope of the present invention is not limited thereto. The main sound processor 200 may be provided as a component of any one of the individual sound processors 100-1, 100-2, ..., 100-N, and in this case, the individual sound processor 100-1. , 100-2,..., 100 -N respectively operate to allow wireless communication with each other with different identifiers (IDs).

Hereinafter, a sound processing method in a grid speaker system according to a first embodiment of the present invention will be described with reference to FIG. 4.

First, the main sound processing unit 200 and the individual sound processing units 100-1, 100-2,..., 100 -N for the sound processing according to the first embodiment of the present invention have a period from the main sound processing unit 200. The time is synchronized with each other by the conventional broadcasting signal to maintain the same time. This is performed by the synchronization unit 130-N in the individual sound processing units 100-1, 100-2, ..., 100-N.

Thereafter, the main sound processor 200 downloads a specific music file or sound file from the server having a music source through the media interface unit 210 or downloads a music file or sound file stored in a CD, DVD, FDD, or the like. Receiving or reading the music file or sound file stored in the main storage unit 220 and starts the sound processing for reproduction (S100).

Next, the main sound processor 200 selects an individual sound processor to reproduce a corresponding file among the individual sound processors 100-1, 100-2, ..., 100-N (S110). For example, the stereo sound should reproduce the sound of the areas different from the right and the left, centering on the center portion of the individual sound processing units 100-1, 100-2, ..., 100-N arranged in a grid. Different sound processing units 100-1, 100-2, ..., 100-N are selected for this sound processing. In addition, when the birds in the forest are scattered in one image, the individual sound processor 100 to produce a plurality of sound source effects to independently reproduce the sound of each bird through the speaker 150-N in the individual sound processing unit 100 -1, 100-2, ..., 100-N). For convenience of description, it is assumed that two separate sound processing units 100-1 and 100 -N are selected from the individual sound processing units 100-1, 100-2,.

Thereafter, the main sound processor 200 transmits a playback file and a command for sound processing of the corresponding file to the selected individual sound processors 100-1 and 100-N (S120-1 and S120-M).

Meanwhile, the individual sound processing units 100-1 and 100-N receiving the play file and the sound processing command of the file from the main sound processing unit 200 store the received play file in the storage unit 120-N ( S130 and S130, and reproduces the stored file (S140 and S140), respectively.

At this time, when the main sound processing unit 200 gives sound processing commands to the individual sound processing units 100-1 and 100-M, the main sound processing unit 200 also designates the time to play the file, and so on. To ensure that a consistent sound processing is performed throughout.

This may be achieved by the main sound processor 200 and the individual sound processors 100-1, 100-2, ..., 100-N communicating according to a predetermined protocol and exchanging necessary data.

As such a protocol, a protocol that has a low overhead, a protocol that has a high speed of transmission and processing of a protocol, is suitable, and User Datagram Protocol (UDP), which is one of protocols including IP, may be preferably used. Since UDP does not go through a handshake, its structure is very simple, and its processing speed is high, so it is usually used for multimedia data transmission.

Packets transmitted and received by the main sound processor 200 and the individual sound processors 100-1, 100-2, ..., 100-N by a protocol may be configured as shown in Table 1 below.

TABLE 1

First, the cell ID is to view each of the individual sound processing units 100-1, 100-2,. Such cell IDs can be assigned in various ways. However, in the embodiment of the present invention, the cell IDs are assigned to indicate the order of the rows and the order of the columns based on the arrangement of the cells in a grid. That is, a row from 0 to 126 can be represented for a row, and a column from 0 to 126 can be represented for a column.

For example, the ID of the cell in the first row and the fifth column is '0h0004'. Here, 0h indicates that ID is a hexadecimal number, next 00 indicates 1 row, and next 04 indicates 5 columns.

Next, the type is a field that can be distinguished so that different types of processing can be performed depending on the type because the length and content of the packet are different. Types are classified into setting types, control types, data types, and error types according to their types. The setting type is a type for time synchronization between the main sound processing unit 200 and the individual sound processing units 100-1, 100-2, ..., 100-N, and the control type is for reproducing a file or various sounds. It is a type for control signal transmission, a data type is a type for location related processing of a user, and an error type is a type for when an error is issued during packet transmission. This type has already been determined by the side that issues and transmits the packet.

Next, time stamp 1 and time stamp 2 store information related to the time at which the packet is transmitted.

The data field contains information on sound control, and information such as a file name to be played, a file position to be played, a volume size, a file position to be played and a time to be played back corresponds to this.

In the above description, the main sound processing unit 200 transmits one playback file to the individual sound processing units 100-1 and 100 -N and performs sound processing. However, the technical scope of the present invention is described herein. Not limited to, it is also possible to have a plurality of individual sound processing unit to play one playback file each at a different time, and each of the individual sound processing unit to play different playback files at the same time or at different times, respectively You can also play it. Such complex sound processing and reproducing methods will be readily understood by those skilled in the art when referring to FIGS. 1 to 4 described above.

In the above description, the main sound processing unit 200 and the individual sound processing units 100-1, 100-2, ..., 100-N have been described to perform sound processing regardless of the position of the user. The technical scope is not limited thereto, and the sound processing may be performed based on the location of the user as in the following second embodiment.

FIG. 6 is a diagram illustrating an example of an individual speech recognition unit 100 -M of the collective speech recognition system illustrated in FIG. 1 according to the second embodiment of the present invention.

As shown in FIG. 6, the individual sound processing unit 100 -M according to the second embodiment of the present invention may include a wireless interface unit 110 -M, a storage unit 120 -M, and a synchronization unit 130 -M. , A position sensor 140 -M, a distance measuring and sound control unit 150 -M, and a speaker 160 -M.

The wireless interface unit 110 -M, the storage unit 120 -M, the synchronization unit 130 -M, and the speaker 160 -M are stored in the wireless interface unit 110 -N described in the first embodiment. Since the same function as that of the unit 120 -N, the synchronization unit 130 -N, and the speaker 150 -N is omitted here, the detailed description thereof will be omitted and only the newly added portion of the second embodiment will be described.

The position sensor 140 -M recognizes the position of the user located in front of the individual sound processor 100 -M, measures the distance to the user, and outputs the corresponding information.

The distance measurement and sound control unit 150 -M is connected to the air interface unit 110 -M, the storage unit 120 -M, and the synchronization unit 140 -M, and the individual sound is controlled under the control of the main sound processor 200. The processor 100-M performs overall control to perform an individual sound processing operation, reproduces a file stored in the storage 120-M, and outputs a sound through the speaker 160-N. 130-M) can be synchronized with other individual sound processing units to generate various stereoscopic sound effects. In addition, the distance measurement and sound control unit 150-M is connected to the position sensor 140-M so that the position sensor 140-M can be positioned to a user located in front of the individual sound processing unit 100-M. The measurement is controlled to be wirelessly transmitted to the main sound processor 200.

Although only the configuration of one individual sound processing unit 100 -M has been described above, the other individual sound processing units 100-1, 100-2,..., 100 -M-1 are also described above. It can be configured similarly to M).

Meanwhile, the main sound processor 200 shown in FIG. 1 may also be configured independently from the individual sound processors 100-1, 100-2, ..., 100-M as in the first embodiment. Each of the individual sound processing units 100-1, 100-2,..., 100 -M may be provided as a built-in component. In this case, the individual sound processing units 100-1, 100-2,. Each of the wireless interfaces 110 -M included in the -M) operates with a different identifier ID to perform wireless communication with each other.

7 is a diagram illustrating an example of the main sound processor 200 shown in FIG. 1 according to the second embodiment of the present invention.

Here, in order to avoid confusion with the main sound processor 200 in the first embodiment, the reference numerals are changed to the main sound processor 400.

As shown in FIG. 7, the main sound processor 400 according to the second embodiment of the present invention includes a media interface unit 410, a main storage unit 420, a wireless interface unit 430, and a location-based sound control unit ( 440).

The media interface unit 410, the main storage unit 420, and the wireless interface 430 are the same as the media interface unit 210, the main storage unit 220, and the wireless interface unit 230 in the first embodiment. Since a function is performed, a detailed description of the function is omitted here for convenience of description, and only a part different from the case of the first embodiment will be described.

The location-based sound controller 440 controls the media interface unit 410, the main storage unit 420, and the wireless interface unit 430 so that music files or sounds downloaded from the outside or stored therein are stored in individual sound processing units ( 100-1, 100-2, ..., 100-M) to control the speaker system having various stereoscopic sound effects independently or collectively. In addition, the location-based sound control unit 440 needs to synchronize with each other so that the individual sound processing units 100-1, 100-2, ..., 100-M can reproduce various types of sounds by performing a consistent sound processing. To this end, the location-based sound control unit 440 and the individual sound processing units 100-1, 100-2,..., 100 -M use NTP (Network Time Portocol).

In addition, the location-based sound controller 440 estimates the exact location of the user based on the distance information to the user measured by the respective sound processor 100-1, 100-2, ..., 100-M, respectively, Based on the estimated position, various sound processing in the individual sound processing units 100-1, 100-2, ..., 100-M is performed. For example, if a user moves and changes its position while playing one file in each of the individual sound processing units 100-1, 100-2,. The sound processing is performed by the individual sound processing units 100-1, 100-2, ..., 100-M based on the position of the user who is measured, transmitted, and moved by 100-1, 100-2, ..., 100-M). To be controlled.

Hereinafter, a position-based sound processing method in a lattice speaker system according to a second embodiment of the present invention will be described with reference to FIG. 8.

First, the main sound processor 400 and the individual sound processors 100-1, 100-2, ..., 100-M for the location-based sound processing according to the second embodiment of the present invention is the main sound processor 400 The time is synchronized with each other by the periodic broadcasting signal from the same time. This is performed by the synchronization unit 130-M in the individual sound processing units 100-1, 100-2, ..., 100-M.

Thereafter, the main sound processor 400 downloads a specific music file or sound file from a server having a music source through the media interface unit 410 or stores a music file or sound file stored in a CD, DVD, FDD, or the like. Receiving or reading the music file or sound file stored in the main storage unit 420 and starts the sound processing for reproduction (S200).

Next, the main sound processor 400 selects an individual sound processor to reproduce the corresponding file from among the individual sound processors 100-1, 100-2, ..., 100-M based on the position of the user (S210). For example, when the user is located in the center of the individual sound processing units 100-1, 100-2,..., 100 -M arranged in a grid, the right and left sides of each other are centered on the center of the user. Since the sound of the different areas must be reproduced, different individual sound processing units 100-1, 100-2,..., 100 -M are selected for this sound processing. In addition, when the birds in the forest are scattered in one image, the individual sound processor 100 to produce a plurality of sound source effects to independently reproduce the sound of each bird through the speaker (160-M) in the individual sound processing unit 100 -1, 100-2, ..., 100-M). For convenience of explanation, it is assumed that two individual sound processing units 100-1 and 100-2 are selected from the individual sound processing units 100-1, 100-2,.

Next, since the main sound processor 400 may move the user's position, the main sound processor 400 transfers the playback file to all the individual sound processors 100-1, 100-2, ..., 100-M (S220-1). In operation S220-2, a command is transmitted to the individual sound processing units 100-1 and 100-2 selected in the step S210 to perform sound processing of the transferred file. At this time, the steps (S220-1, S220-2) may be performed at the same time. That is, the reproduction file and the individual sound processing units 100-1 and 100-2 to be reproduced may be designated and delivered together.

Meanwhile, all of the individual sound processing units 100-1, 100-2,..., 100 -M that have received the playback file from the main sound processing unit 400 store the received playback file in each storage unit 120 -M. (S230).

Next, the individual sound processing units 100-1 and 100-2 receiving the sound processing command of the play file play the received play files, respectively, and output them to the user through each speaker 160 -M (S240).

At this time, when the main sound processing unit 400 gives sound processing commands to the individual sound processing units 100-1 and 100-2, the main sound processing unit 400-1 also designates the time to play the file, and so on. To ensure that a consistent sound processing is performed throughout.

As such, when the user moves while the stereo sound processing is performed by the main sound processing unit 400 and its position is changed, the individual sound processing units 100-1, 100-2,. The user's changed position is measured by the position sensor 140 -M and the distance measuring and sound control unit 150 -M, and the information is transmitted to the position-based sound control unit 440 of the main sound processor 400 (S250). -1, S250-2, ..., S250-M-1, S250-M).

Then, the location-based sound controller 440 of the main sound processor 400 determines whether the user's location is moved from the user's location information transmitted from the individual sound processors 100-1, 100-2, ..., 100-M. (S260), if it is determined that the position is changed by the user's movement, the individual sound processing units 100-1, 100-2, ..., 100-M to perform sound processing based on the moved user's position are re-elected. Determine (S270). In this case, it is assumed that two separate sound processing units are re-selected based on the location of the moved user, 100-M-1 and 100-M.

Next, the main sound processing unit 400 commands the re-selected individual sound processing units 100-M-1 and 100-M to perform the sound processing after the sound processing for the playback file, and simultaneously plays the file to perform sound output. While not reselected in the reselection step (S270), the individual sound processor 100-1, 100-2 transmits a command to stop the playback operation (S280-2).

Therefore, the individual sound processing units 100-M-1 and 100-M reproduce the stored file and output the sound to the user through the speaker 160-M (S290-1), and the individual sound processing units 100-1 and 100. -2) stops the playback operation (S290-2).

In the above description, only the processing in the case where one user position change is measured is described. However, when the position of the user periodically measured by the individual sound processing units 100-1, 100-2, ..., 100-M is continuously changed. In the following, a change of the user's position is continuously reported to the main sound processor 400, and accordingly, an individual sound processor 100-1, 100-2, ..., 100-M that performs sound output based on the user's changed position. ) The reselection operation is processed repeatedly.

In addition, in the above, the individual sound processing units 100-1 and 100-2, which are being reproduced in accordance with the movement of the user's position, stop the reproduction operation at once, and are newly selected individual sound processing units based on the moved user's position. Although (100-M-1, 100-M) described as suddenly reproducing a file, the technical scope of the present invention is not limited thereto, and the individual sound processing units 100-1 and 100-2 which stop playback are The playback may be stopped while the playback volume is sequentially decreased, and the individual sound processing units 100-M-1 and 100-M which start playback may start playback while gradually increasing the playback volume.

Although the present invention has been described with reference to the most practical and preferred embodiments, the present invention is not limited to the above-described embodiments, but includes various modifications and equivalents within the scope of the following claims.

According to the present invention, a mixing effect can be provided by reproducing using a plurality of sound sources independently.

In addition, by changing the position of the sound reproduction in accordance with the user's position movement can adjust the sweet spot (automatically optimized sweet spot) to enjoy the stereoscopic sound.

In addition, the sound source can be moved even without the user's position shift, thereby providing various sound transition effects.

1 is a schematic block diagram of a grid speaker system according to a first embodiment of the present invention.

2 is a diagram illustrating an example of an individual sound processor illustrated in FIG. 1 according to a first embodiment of the present invention.

3 is a diagram illustrating an example of the main sound processor shown in FIG. 1 according to the first embodiment of the present invention.

4 is a schematic flowchart of a sound processing method of a grid speaker system according to a first embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of an intelligent digital wall to which a lattice speaker system according to an exemplary embodiment of the present invention is applied, wherein (a) is a front view and (b) is a side view.

6 is a diagram illustrating an example of an individual voice recognition unit of the collective voice recognition system shown in FIG. 1 according to the second embodiment of the present invention.

7 is a diagram illustrating an example of the main sound processor shown in FIG. 1 according to the second embodiment of the present invention.

8 is a schematic flowchart of a location-based sound processing method in a lattice speaker system according to a second embodiment of the present invention.

Claims (16)

A plurality of individual sound processing units each including a speaker for outputting sound to the outside; And Wirelessly or wired to the plurality of individual sound processing units, respectively, to independently drive and control the speakers of the plurality of individual sound processing units, and select an individual sound processing unit to output sound according to a playback file by selecting from the plurality of individual sound processing units Main sound processing unit for controlling the sound output by playing the playback file Speaker system comprising a. The method of claim 1, And a plurality of speakers each included in the plurality of individual sound processing units are arranged in a grid. The method of claim 1, And the plurality of individual sound processing units operate in synchronization with the main sound processing unit, respectively, in time. The method of claim 1, Each of the plurality of individual sound processing units, A storage unit for storing the playback file transmitted from the main sound processor; A synchronization unit for controlling time synchronization with the main sound processing unit; And A sound control unit is connected to the storage unit and the synchronization unit, and reproduces the playback file stored in the storage unit under the control of the main sound processing unit and outputs the corresponding sound through the speaker as a corresponding sound. Speaker system comprising a. The method of claim 1, The main sound processing unit, A media interface unit for downloading a playback file from a network or an external medium; A main storage unit for storing the playback file downloaded through the media interface unit; And A main sound interface connected to the media interface unit and the main storage unit, the main sound control unit configured to select the individual sound processing unit to play back the playback file stored in the main storage unit from the plurality of individual sound processing units and to play the play file independently or collectively; Sound control unit Speaker system comprising a. The method of claim 1, The plurality of individual sound processing units respectively measure the distance to the user and outputs to the main sound processing unit, The main sound processor controls playback operations in the plurality of individual sound processors based on the position information of the user and the distance information from the sound source respectively measured by the plurality of individual sound processors. Speaker system, characterized in that. The method of claim 6, The plurality of individual sound processing unit A storage unit for storing the playback file transmitted from the main sound processor; A synchronization unit for controlling time synchronization with the main sound processing unit; A position sensor for measuring a position of the user and a distance from a sound source and outputting the corresponding information; And Is connected to the storage unit and the synchronization unit and reproduces the playback file stored in the storage unit under the control of the main sound processing unit and outputs through the speaker with a corresponding sound, and connected to the position sensor and the user's location and sound source Distance measurement and sound control unit to control the distance from the Speaker system comprising a. The method of claim 6, The main sound processing unit, A media interface unit for downloading a playback file from a network or an external medium; A main storage unit for storing the playback file downloaded through the media interface unit; And Connected to the media interface unit and the main storage unit to control an individual sound processing unit to play back the playback file stored in the main storage unit from among the plurality of individual sound processing units to independently or collectively play the playback file; Location-based sound control unit for selecting and controlling the individual sound processor to play the playback file based on the user's position determined based on the user's position and distance information from the sound source, respectively measured and delivered by a plurality of individual sound processor Speaker system comprising a. The method of claim 8, The speaker system, characterized in that the position-based sound control unit reselects the individual sound processing unit for reproducing the playback file in accordance with the user's position movement from the plurality of individual sound processing unit. The method according to any one of claims 2 to 9, The plurality of individual sound processor and the main sound processor further comprises a wireless interface unit for transmitting and receiving information to each other wirelessly. The method of claim 10, The main sound processor is provided in any one of the plurality of individual sound processor, Wireless interface units included in the plurality of individual sound processing units may transmit and receive information with each other. Speaker system, characterized in that. a) selecting an individual sound processor to control playback according to a file to be reproduced among a plurality of individual sound processors each including a speaker capable of outputting sound; And b) a main sound processor controlling the plurality of individual sound processors respectively controlling the selected individual sound processors so that the file reproduction is performed independently. Sound processing method in a speaker system comprising a. The method of claim 12, Before step a), The main sound processor further comprises the step of controlling the plurality of individual sound processor to operate in synchronization with each other in time. The method according to claim 12 or 13, After step b), i) receiving distance information measured from each of the plurality of individual sound processors to a user; ii) determining whether the location of the user has been changed by the received distance information; iii) if it is determined that the user's position has changed, newly selecting an individual sound processor to play the playback file from among the plurality of individual sound processors; And iv) controlling each of the newly selected individual sound processing units to independently play the file based on the changed position of the user. Sound processing method in the speaker system further comprising. The method of claim 14, In step iv), The individual sound processing unit which does not belong to the newly selected individual sound processing unit among the individual sound processing units which were playing the file before changing the position of the user is controlled to stop the file playing operation. . The method of claim 15, The newly selected individual sound processing unit starts playing the file while gradually increasing the playback volume, The individual sound processor which stops the file play operation stops the file play operation while gradually decreasing the play volume. A sound processing method in a speaker system, characterized in that.