KR101831325B1 - Acoustic apparatus and method for controlling the acoustic apparatus - Google Patents

Abstract

The present invention relates to an acoustic apparatus and a method of controlling the acoustic apparatus and, more specifically, to an acoustic apparatus capable of adjusting a bright zone, which is a focusing region, as well as a control method of the acoustic apparatus, which enables a user to directly control the acoustic apparatus from the outside. According to an embodiment of the present invention, provided is a method of controlling an acoustic apparatus, which filters an original sound received from an original sound generator with a filtering coefficient and outputs the filtered original sound through a speaker array in order to form a bright zone with a pressure sound level not less than a predetermined threshold and a dark zone with a pressure sound level less than the threshold, using a control device that communicates with the acoustic apparatus and includes at least one display. The method comprises the steps of: displaying, by the control device, on the display a speaker array image corresponding to the speaker array and a reference point corresponding to the bright zone; generating a control signal including movement information of the reference point when the reference point is moved by a user input; providing a control signal to the acoustic apparatus so that the acoustic apparatus moves the bright zone to correspond to the movement of the reference point; receiving arrangement information of the speaker array or number information of the speaker array from the acoustic apparatus; and changing the speaker array image displayed on the display in accordance with the received arrangement information of the speaker array or the number information of the speaker array.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for controlling a sound device and a sound device,

The present invention relates to a method of controlling a sound device and a sound device, and more particularly, to a sound device capable of adjusting a bright zone, which is a focusing area, and a control method of a sound device, .

Acoustic control can be achieved by using a sound field reproduction method, an active noise control method of reducing the sound volume of a space using a plurality of active sound sources, a method of changing intervals between sound sources arranged in a specific shape, And a method of increasing the acoustic power radiated at a specific angle.

However, the solution of the formula for a particular sound source array is difficult to apply to any sound source. Therefore, optimization studies have been carried out in order to have maximum directionality in a specific direction assuming an arbitrary sound source arrangement. However, such a study is also applied to a general listening space having various types of sound source radiation, reflection, and sound absorption, It was not suitable for the following.

U.S. Patent No. 5,802,190 entitled " Linear speaker array " describes a technique for controlling indirect characteristics such as directionality using limited assumptions such as ignoring distances or reflections to a listener. U.S. Patent No. 5,910,990 (Apparatus and method for automatic equalization of personal multi-channel audio system) discloses a method of reproducing a signal without distortion using a transfer function.

Korean Patent Application No. 10-2008-0125309 (entitled "Directional Sound Generating Apparatus and Method") proposes a method of radiating sound to a specific region, but it is also possible to provide a sound field .

In this way, the conventional sound control method of a space using a plurality of sound sources merely changes the time delay between the sound sources and the input size thereof, and only the directionality of the sound source is changed using a limited sound source arrangement, There has been no consideration of the location of the listener within the space of.

For example, in a given space such as a living room, a listener wants to listen to a sound source coming out through a speaker, and when another listener in the same space does not want to listen to the sound source, , But the sound source is also delivered to the listener who does not want to listen in the above-mentioned manner.

Thus, there is a need for a technique for separately controlling focusing positions of various sound sources output in a predetermined space, and there is a high demand for such a technique.

In addition, it is also necessary to study techniques for directly controlling a user who purchases and uses a sound device, rather than determining in advance a manufacturer of a sound device, focusing positions of various sound sources output in a predetermined space .

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a sound device and a method of controlling the sound device, which can separately control a focusing area of a sound source output in a predetermined space.

It is another object of the present invention to provide an audio apparatus and a sound apparatus for controlling a sound field of a sound source to be output within a predetermined space by a user who purchases and uses the sound apparatus, In the method of the present invention.

It is another object of the present invention to provide a method of controlling a sound device and a sound device that allows a user to directly control the size of a bright zone as a focusing area.

It is another object of the present invention to provide a sound device and a method of controlling the sound device, which enable a user to directly select an original sound signal to be heard in a bright zone as a focusing area.

The acoustic device according to the embodiment of the present invention updates the filtering coefficient set to a default value in accordance with the control signal received from the control device and filters the original sound signal received from the original sound signal generating device using the updated filtering coefficient, A bright zone adjustment unit for outputting the excitation source signal; A brightness zone having a sound pressure level equal to or higher than a preset threshold value in a direction of outputting the sound and a sound pressure level lower than the threshold value; And a speaker array forming a dark zone.

A control method of an audio equipment according to an embodiment of the present invention includes filtering a source sound signal received from an original sound signal generating device with a filtering coefficient, outputting the filtered sound source signal through a speaker array, CLAIMS 1. A method for controlling an acoustic apparatus forming a dark zone having a zone and a sound level lower than the threshold by using a control apparatus communicating with the acoustic apparatus and having at least one display, Displaying a speaker array image corresponding to the speaker array and a reference point corresponding to the bright zone; Generating a control signal including movement information of the reference point when the reference point is moved by user input; And providing the control signal to the acoustic device to move the bright zone so that the acoustic device corresponds to the movement of the reference point.

According to the method of controlling the acoustic apparatus and the acoustic apparatus according to the present invention, it is possible to individually control the focusing region of the sound source output in a predetermined space.

In addition, a focusing area of a sound source to be output in a predetermined space can be directly controlled by a user who purchases and uses a sound apparatus, not a manufacturer of the sound apparatus.

Also, the user can directly control the size of the bright zone as the focusing area.

Also, the user can directly select the original sound signal to be heard in the bright zone, which is the focusing area.

1 is a schematic view of a system for setting a bright zone which is a focusing area.
FIG. 2 is a diagram showing a bright zone (BZ) and a dark zone (DZ) in a predetermined space such as a living room.
Fig. 3 is a view for explaining a method of forming the bright zone BZ and the dark zone DZ.
4 is a perspective view of a sound device according to an embodiment of the present invention.
5 is a block diagram of an acoustic system including the acoustic equipment shown in FIG.
6 to 7 are diagrams for explaining the movement of the bright zone.
8 to 9 are views showing movement of reference points on the display of the control device corresponding to the movement of the bright zone shown in Figs. 6 to 7. Fig.
10 is an example of display on a display of a control device for explaining a method of selecting an original sound signal heard in the bright zone and a method of adjusting the size of the bright zone.
11 is a view showing that the bright zone BZ is enlarged when the gain adjustment image is executed in response to a user input and the gain is increased.
12 is a flowchart for explaining a method of adjusting a bright zone in an audio equipment according to an embodiment of the present invention.

The present invention will now be described in detail with reference to the accompanying drawings, which show specific embodiments in which the present invention may be practiced. For a specific embodiment shown in the accompanying drawings, those skilled in the art will be described in detail so as to be sufficient for practicing the present invention. Other embodiments than the particular embodiment need not be mutually exclusive but different from each other. It is to be understood that the following detailed description is not to be taken in a limiting sense.

The detailed description of the specific embodiments shown in the accompanying drawings is read in conjunction with the accompanying drawings, and the drawings are considered as a part of the description of the entire invention. The mention of direction or orientation is for convenience of description only and is not intended to limit the scope of the invention in any way.

1 is a view schematically showing a configuration for setting a focusing area.

1 shows schematically means of an acoustic space, a speaker 110 and a microphone 210 for measuring a transfer function for convenience of explanation and understanding, a larger number of microphones 210 and a speaker 110 Can be used to measure the transfer function. Specifically, the focusing area setting system can be configured by a 30 × 6 channel microphone array 210 spaced 4 cm apart and a plurality of speakers 110 having independent channels. The measurement of the transfer function can be performed in a plurality of regions in a predetermined space. However, this is merely an example, and a setting system may be configured in various ways according to the size of the space, the structure of the space, and the like.

Referring again to FIG. 1, a first speaker 111 and a second speaker 112 functioning as sound sources are installed in an acoustic space (corresponding to a predetermined space here) at an arbitrary position. The first speaker 111 and the second speaker 112 are not limited to the bright zone (BZ) and the dark zone (DZ), but are not limited thereto .

The bright zone BZ refers to a region where the sound output from the first speaker 111 and the second speaker 112 is heard above a threshold value and the dark zone DZ refers to a region where the first speaker 111 and the second speaker 112 112) is heard below the threshold value. Briefly, the bright zone BZ denotes a focusing area for focusing a sound source by a user, and the dark zone DZ denotes a non-audible area. A non-focusing area in which a user does not focus a sound source Lt; / RTI > Since the distinction between the bright zone BZ and the dark zone DZ is based on the contrast of the sound pressure level, more specifically, the contrast of the space-average sound energy, the sound may be controlled so as not to be heard in the dark zone DZ , It may be controlled so that a small sound is sensed. In FIG. 2, a bright zone (BZ) and a dark zone (DZ) are schematically depicted in a predetermined space such as a living room and are distinguished by circles having a dotted line.

)에서의 음압(

, 마이크로폰(210)에 의하여 검지되는 신호)은 수학식 1과 같이 표현할 수 있다.Any point created by the first sound source and the second sound source (

) Of the sound pressure

, A signal detected by the microphone 210) can be expressed by Equation (1).

은 공간상의 j번째 지점이고,

은 i번째 음원의 위치를 의미한다. 그리고

는

과

사이의 관계를 표현해주는 전달 함수이다. 여기서 전달 함수는 수학적인 모델로 정의하거나 실제 측정을 통해서 쉽게 얻을 수 있다. 수학식 1을 두 개의 지점의 경우에 대해 행렬의 형태로 표현하면 수학식 2와 같이 표현할 수 있다. here

Is the jth point in space,

Is the position of the i-th sound source. And

The

and

Is a transfer function that expresses the relationship between. Here, the transfer function can be defined as a mathematical model or easily obtained through actual measurement. Equation (1) can be expressed as a matrix in the case of two points as shown in Equation (2).

Likewise, the determinant expression for the first bright zone BZ1, the second bright zone BZ2, the dark zone DZ, and the entire acoustic area TZ including the two areas shown in Fig. (3) to (5). The subscripts b, d, and t in Equations (3) to (5) refer to the bright zone (BZ), the dark zone (DZ), and the entire acoustic region (TZ).

Next, variables representative of the space are defined. In the present invention, the variable is defined as the spatial average acoustic energy, and can be expressed as Equation (6).

The reason why the spatial average acoustic energy is defined as a representative parameter of the space is that it is difficult to express the acoustic characteristics within an area by only the sound pressure levels of the respective points. That is, in the present invention, the spatial average acoustic potential energy of the bright zone (BZ), the spatial average acoustic energy of the dark zone (DZ), and the spatial average acoustic potential energy of the entire acoustic region (TZ) .

은 정의된 영역에서의 각 음원이 만들어내는 간섭정도를 나타내는 상관행렬로 정의된다. 그리고 2라는 숫자는 수학식 2에서의 마이크로폰(210)의 개수를 의미한다(도 1 참조). 이해의 편의를 위해서 본 발명에서는 간단한 경우에 대하여 표현한 것이지만, 실제로는 어떤 정의된 영역 내부에 포함되어있는 마이크로폰의 개수를 의미한다. In Equation (6)

Is defined as a correlation matrix indicating the degree of interference produced by each sound source in the defined region. And the number 2 means the number of the microphones 210 in the equation (2) (see FIG. 1). For convenience of understanding, the present invention is expressed in a simple case, but actually means the number of microphones included in a certain defined area.

That is, if 30 microphones are used, the number 2 will change to 30. The spatial average acoustic energy for the bright zone (BZ) and the dark zone (DZ) defined by this logic can be expressed.

Next, the process of deriving the first sound source signal and the second sound source signal necessary to obtain the required control effect by using the sound pressure levels in the respective regions defined by Equations (7) to (9) will be described .

1. Determination of the sound source signal which maximizes the contrast between the sound pressure level in the bright zone (BZ) and the total size of the input

The total size of the input is defined as the sum of the absolute value of the complex magnitude of the first sound source signal and the absolute value of the complex magnitude of the second sound source signal, which may be referred to as the total size of the control effort. The total size of the input is expressed by the following equation (10).

은 입력의 총 크기, 즉 제어 노력을 공간평균음향에너지의 차원(dimension)으로 변화시키는 정규화 상수이다.here,

Is the normalization constant that changes the total size of the input, i. E., The control effort, to the dimension of the spatial average acoustic energy.

Now, the contrast between the sound pressure level in the bright zone BZ and the total size of the input is expressed by Equation (11) using Equations (7) and (10) and this is defined as " acoustic brightness ".

Therefore, determining the sound source signal that maximizes the contrast between the sound pressure level in the bright zone BZ and the total size of the input is a problem of finding a sound source signal that maximizes the value of alpha in Equation (11).

Equation (11) can be formulated mathematically as a problem of maximizing a Reyleigh quotient α, which is expressed by Equation (12).

As shown in Equation (12), obtaining a sound source signal that maximizes the value of? Becomes equal to obtaining the maximum eigenvalue of the generalized eigenvalue problem. And the eigenvectors corresponding to the maximum eigenvalues become the first sound source signal and the second sound source signal.

2. Determine the input signal to maximize the contrast between the bright zone (BZ) and the dark zone (DZ)

Consider a sound source input signal that maximizes the contrast between the sound pressure level of the bright zone BZ and the sound pressure level of the dark zone DZ. The sound pressure level of the bright zone BZ relative to the dark zone DZ can be mathematically expressed as Equation 13 and this is defined as " acoustic contrast 1 ".

Equation (13) can also be formulated as a problem of maximizing the Reyley quotient [beta], which is the same as the problem of the maximum eigenvalue of a generalized eigenvalue problem as shown in Equation (14). And the eigenvectors corresponding to the maximum eigenvalues become the first sound source signal and the second sound source signal.

Therefore, the present invention uses a method of obtaining an optimum sound source control signal by grasping all the transfer functions, while the conventional methods reflect the relationship between the listener and the sound sources in a limited form.

Therefore, unlike the active noise control which only reduces the sound pressure level, the present invention can increase the relative difference in the sound pressure level by space. That is, it is possible to control not only the magnitude of the sound pressure level corresponding to the acoustical brightness but also the acoustical contrast between the two different spaces.

3. Determine the input signal that maximizes the contrast of the sound pressure level between the bright zone BZ and the entire acoustic area TZ

The sound source input signal which maximizes the contrast of the sound pressure level between the bright zone BZ and the entire sound area TZ will be handled. The sound pressure level of the entire acoustic region TZ with respect to the dark zone DZ can be expressed as Equation 15 and this is defined as " acoustic contrast 2 ".

를 최대로 하는 문제로 정식화할 수 있으며, 수학식 16에서 보는 바와 같이 일반화된 고유치문제의 최대 고유치와 문제와 동일하다. 그리고 최대 고유치에 해당하는 고유벡터가 제1 음원 신호와 제2 음원 신호가 된다.Equation (15) also equals the Reyley quotient

And the problem is the same as the problem of the maximum eigenvalue of a generalized eigenvalue problem as shown in Equation (16). And the eigenvectors corresponding to the maximum eigenvalues become the first sound source signal and the second sound source signal.

4. A method for providing an independent acoustic environment to multiple bright zones (BZ)

There are three ways to provide an independent acoustic environment for multiple bright zones (BZ).

[Method 1] In the first bright zone BZ1, the ratio of the sum of the space average acoustic energy by the first sound source signal and the sum of the energy of the first sound source signal is maximized. In the second bright zone BZ2, When the ratio of the sum of the spatial average acoustic energy by the sound source signal and the sum of the energy of the second sound source signal is maximized

In this case, an input signal is derived differently for each bright zone BZ1 and BZ2. This can be expressed as the following equation.

[Method 2] In the first bright zone BZ1, the ratio of the spatial average acoustic energy by the first sound source signal to the spatial average acoustic energy in the remaining region excluding the first bright zone BZ1 is maximized, When the ratio of the space average acoustic energy by the second sound source signal to the space average acoustic energy in the remaining area excluding the second bright zone BZ2 is maximized in the 2 bright zone BZ2

In this case, an input signal is derived differently for each bright zone BZ. This can be expressed as the following equation.

[Method 3] When there are a plurality of bright zones BZ, the first bright zone BZ1 is irradiated with the spatial average acoustic energy by the first sound source signal and the spatial average acoustic energy in the entire region including the first bright zone BZ1 The ratio of the spatial average acoustic energy by the second sound source signal to the spatial average acoustic energy in the entire region including the second bright zone BZ2 is maximized in the second bright zone BZ2 When

In this case, an input signal is derived differently for each bright zone BZ. This can be expressed as the following equation.

In the case of the above three methods, input signals are derived differently for each bright zone BZ, and input signals entering the first sound source and the second sound source are commonly expressed by Equation (23).

In this case, the first bright zone BZ1 is capable of generating a plurality of independent audio environments in which the reproduced sound by the first input signal and the second bright zone BZ2 are reproduced by the second input signal .

To summarize the theoretical contents above, the present invention uses a method of acquiring an optimal sound source signal by grasping all the transfer functions, while the conventional methods reflect the relationship between the listener and the sound sources in a limited form.

Therefore, unlike the active noise control, which only reduces the sound pressure level, the present invention increases the relative difference in the sound pressure level in each area in the acoustic space. That is, the present invention performs not only the magnitude of the sound pressure level corresponding to the acoustical brightness but also the control to increase the acoustic contrast between two different areas.

The method of forming the bright zone BZ and the dark zone DZ will be described in more detail with reference to FIG.

As shown in FIG. 1, the system for measuring the transfer function and setting the bright zone BZ (or the focusing area) includes a sound source, a sensing unit 200, a signal generating unit 300, (400).

The sound source section includes a plurality of speakers 110 corresponding to a plurality of sound sources and a multi-channel amplifier 120 capable of driving the plurality of speakers.

The sensing unit 200 includes a plurality of microphones 210 installed in the bright zone BZ and the dark zone DZ.

The signal generator 300 includes a multi-channel signal generator 310 capable of providing individual sound source signals synchronized with the respective speakers 110 through the multi-channel amplifier 120 of the sound source.

The signal analyzing unit 400 measures a transfer function between the sound source signal q input to the sound source unit and the sound signal p sensed by the sensing unit 200, determines a suitable sound source signal, And a multi-channel signal analyzer (410) for transmitting the multi-channel signal to a multi-channel signal generator (310)

를 최대로 하거나(음향밝기 제어), 수학식 19, 20의 음향대조 1

을 최대로 하거나(음향대조 1 제어), 수학식 21, 22의 음향대조 2

를 최대로 하는(음향대조 2 제어) 음원 신호를 말한다. 그리고 이렇게 결정된 음원 신호가 청구범위에서 사용되는 용어로 말하자면 제어 음원 신호이다.Here, a suitable sound source signal is the sound brightness of Equations (17) and (18)

(Sound brightness control), or the sound contrast 1 of Equations 19 and 20

(Sound control 1 control), or the sound control 2 of Equations 21 and 22

(Sound control 2 control) sound source signal. And the sound source signal thus determined is the controlled sound source signal in terms of the claims.

Referring to FIG. 3, a signal analysis unit 400 measures a transfer function between a sound source signal q generated in the sound source unit and an acoustic signal p sensed by the sensing unit 200 (step S1). Since a large amount of measurement is required depending on the number of the speakers 110 and the number of the microphones 210 in measuring the transfer function, convenience of measurement of the transfer function can be achieved by the following simple method .

In this simple method, white noise having no correlation is input as a sound source signal q input to a plurality of speakers 110, and then a sound signal The contribution function is separated to measure the transfer function between the sound source signal q of the sound source unit and the sound signal p of the sensing unit 200 by one measurement.

Next, the signal analyzer 400 determines an appropriate sound source signal using the transfer function measured in step S1, and transmits the determined sound source signal to the signal generator 300 (step S2).

를 최대로 하거나(음향밝기 제어), 수학식 19, 20의 음향대조 1

을 최대로 하거나(음향대조 1 제어), 수학식 21, 22의 음향대조 2

를 최대로 하는(음향대조 2 제어) 음원 신호를 말한다. 그리고 이렇게 결정된 음원 신호가 청구범위에서 사용되는 용어로 말하자면 제어 음원 신호이다.Here, a suitable sound source signal is the sound brightness of Equations (17) and (18)

(Sound brightness control), or the sound contrast 1 of Equations 19 and 20

(Sound control 1 control), or the sound control 2 of Equations 21 and 22

(Sound control 2 control) sound source signal. And the sound source signal thus determined is the controlled sound source signal in terms of the claims.

Here, although a single frequency is described, it is understood that when the frequency is composed of a plurality of frequencies, the sound source signal for each frequency is determined. In addition, the sound source signal determined here functions as a filtering coefficient for filtering the original sound signal (any sound to be heard in the bright zone BZ) in step S3 described later.

Next, the signal generator 300 filters the original sound signal with the sound source signal (or filtering coefficient) determined in step S2 on the basis of the information received from the signal analyzer 400, and optimizes the bright zone BZ (Filtered sound source signal), and transmits the optimized sound source signal to the sound source unit 100 (step S3).

Here, although a single frequency is described, it can be understood that, when the frequency is composed of a plurality of frequencies, the original sound signal is filtered with the determined sound source signal and the sound source signal for the optimized one is generated at each frequency.

Next, the tone generator 100 outputs the optimized tone generator signal from the signal generator 300 through the speaker 110 (step S4), and accordingly, the acoustic area includes a listening area (bright zone BZ) A non-listening area (dark zone BZ) may be generated (step S5).

Since the acoustic brightness control has the maximum sound pressure level in the bright zone BZ for the same input size, it is more useful when the size of the input can not be increased, for example, when the size of the input is limited.

However, the acoustic brightness control is disadvantageous in that it is relatively louder than the acoustic contrast 1 control and the acoustic contrast 2 control in the region other than the bright zone (BZ). Therefore, it is more efficient and effective when the sound is not very small in the area other than the bright zone BZ.

Control of sound contrast 1 and control of sound contrast 2 show the result of generating a bright zone (BZ) which is superior to the control of acoustical brightness unless the input size is excessively limited. In addition, since the sound control 1 control and the sound control 2 control become very small in the area other than the bright zone BZ, the size of the sound reproducing apparatus is more excellent than the sound brightness control in all cases of small size, medium size, Do.

Hereinafter, a sound device according to an embodiment of the present invention based on the above-described principle of generating a bright zone (BZ), a method of controlling the sound device through a control device, and an acoustic system including the sound device will be described in detail .

FIG. 4 is a perspective view of a sound device according to an embodiment of the present invention, and FIG. 5 is a block diagram of an acoustic system including the sound device shown in FIG.

Referring to FIG. 4, an audio apparatus 1 according to an embodiment of the present invention includes a main body 10, a first speaker array 30a, and a second speaker array 30b.

The main body 10 includes various components. The main body 10 includes the bright zone adjusting unit 11, the multi-channel decoder 13, and the multi-channel amplifier 15 shown in FIG.

The bright zone adjusting section 11 adjusts the bright zone. The adjustment of the bright zone can be performed by the user, and the user can adjust the bright zone through the control device 3. [

The bright zone adjusting section 11 filters the original sound signal inputted from the original sound signal generating device 5 in accordance with the control signal from the control device 3. [ More specifically, the bright zone adjusting unit 11 updates the filtering coefficient stored as the current default value in accordance with the control signal from the control device 3, and outputs the original sound signal Filter the signal. When the filtered sound source signal by the updated filtering coefficient is decoded and amplified through the multi-channel decoder 13 and the multi-channel amplifier 15 and outputted from the first and second speaker arrays 30a and 30b, The sounds output from the first and second speaker arrays 30a and 30b are heard not in the existing bright zone but in a new bright zone or higher than the threshold value.

를 최대로 하거나(음향밝기 제어), 수학식 19, 20의 음향대조 1

을 최대로 하거나(음향대조 1 제어), 수학식 21, 22의 음향대조 2

를 최대로 하는(음향대조 2 제어) 음원 신호를 말한다. 상기 음원 신호는 계측된 전달 함수를 이용하여 결정될 수 있다. Here, the filtering coefficients set as the default values are the acoustic brightnesses of the equations (17) and (18)

(Sound brightness control), or the sound contrast 1 of Equations 19 and 20

(Sound control 1 control), or the sound control 2 of Equations 21 and 22

(Sound control 2 control) sound source signal. The sound source signal may be determined using the measured transfer function.

를 최대로 하거나(음향밝기 제어), 수학식 19, 20의 음향대조 1

을 최대로 하거나(음향대조 1 제어), 수학식 21, 22의 음향대조 2

를 최대로 하는(음향대조 2 제어) 음원 신호가 아닌, 통상적인 공간에 대한 해석에 의해서 가정된 여러 필터링 계수들(일종의 데이터 뱅크) 중에서, 제조사 또는 사용자가 선택한 임의의 필터링 계수일 수도 있다. 여기서, 통상적인 공간에 대한 해석에 의해서 가정된 여러 필터링 계수들이란, 내부가 구 형상 또는 육면체 형상 등과 같이 일반적으로 알려진 여러 공간들 각각에 대응하는 필터링 계수들의 집합을 의미한다. 여러 공간들 각각에 대응하는 필터링 계수들은 계측이 아닌 가정에 의해 미리 얻어진 값들이다.On the other hand, the filtering coefficients set as the default values are the acoustic brightnesses of Equations 17 and 18 described above

(Sound brightness control), or the sound contrast 1 of Equations 19 and 20

(Sound control 1 control), or the sound control 2 of Equations 21 and 22

May be any filtering coefficient selected by the manufacturer or the user among the various filtering coefficients (a kind of data bank) assumed by the analysis on the usual space, rather than the sound source signal (acoustic control 2 control) Here, the various filtering coefficients assumed by the analysis on the conventional space mean a set of filtering coefficients corresponding to each of a plurality of generally known spaces such as a spherical shape or a hexahedral shape. The filtering coefficients corresponding to each of the plurality of spaces are values obtained in advance by the assumption, not the measurement.

6 and 7, if the original sound signal provided from the original sound signal generator 5 is filtered by the filtering coefficients stored as the default values, the first speaker array 30a and the second speaker array 30b Is heard below the threshold value in the dark zone DZ, which is the remaining region except for the bright zone BZ in the entire region TZ, as shown in Fig. 6, which is heard above the threshold value in the bright zone BZ. On the other hand, if the original sound signal provided from the original sound signal generating device 5 is filtered by the updated filtering coefficient, the first and second speaker arrays 30a and 30b The sound is heard above the threshold value in the new bright zone BZ 'as shown in FIG. 7 and below the threshold value in the dark zone DZ', which is an area other than the new bright zone BZ 'in the entire area TZ.

As described above, the default filtering coefficient is updated by a control signal provided from the control device 3 shown in Fig. Here, the meaning that the filtering coefficient is updated may be determined using the measured transfer function, and the predetermined filtering coefficient corresponding to the control signal among the various filtering coefficients assumed by the analysis on the usual space is the filtering coefficient of the default value . ≪ / RTI >

The control signal provided from the control device 3 is provided to the bright zone adjusting section 11 of the acoustic apparatus 1 through wired or wireless communication.

To describe the control device 3 in detail, refer to Figs. 8 to 9. Fig.

8 to 9 are GUI displays of the control device 3 shown in Fig. 5 in the state before the bright zone adjustment. More specifically, FIG. 8 shows GUI display before user input for bright zone adjustment, and FIG. 9 shows GUI display after user input for bright zone adjustment.

As shown in Figs. 8 to 9, the control device 3 provides the display 300. Fig. The display 300 may be a touch screen. Touch screens are used in many electronic devices to display graphics and text, and to provide a user interface for the user to interact with the device. The touch screen detects and responds to touches on the touch screen. The display 300 may display one or more soft keys, menus, and other user interface objects on the touch screen. The user may interact with the device by touching the touch screen at a location corresponding to the user interface object to interact with.

When the display 300 is a touch screen, the control device 3 may include a touch / motion module for detecting touches input to the touch screen. The contact / motion module performs various actions related to contact with the touch screen, e.g., determining whether or not to touch, determining whether movement of the contact and movement traversing the touch screen are tracked, and determining whether to stop the contact And various software components.

When the display 300 is not a touch screen, the control device 3 may include an external input module such as a keyboard or a mouse.

The control device 3 may further comprise a graphics module including various well known software components for providing and displaying graphics on the display 300. The term "graphics" includes, without limitation, text, web pages, icons (e.g., user interface targets including soft keys), digital images, video, animations, .

The control device (3) includes an application for controlling the audio equipment (1). The application may be installed in the control device 3. When the application is executed by the processor in the control device 3, the application is displayed on the display 300. [ Examples shown in FIG. 8 and FIG.

As shown in FIGS. 8 and 9, the display 300 displays a first speaker array image 800a and a second speaker array image 800b. The first speaker array image 800a corresponds to the first speaker array 30a shown in Figures 4 and 5 and the second speaker array image 800b corresponds to the second speaker array 800b shown in Figures 4 and 5 30b. The display 300 includes a first speaker array image 800a and a second speaker array image 800b arranged on the upper side of the display 300 so as to correspond to the arrangement of the first speaker array 30a and the second speaker array 30b, As shown in FIG.

Further, the display 300 displays a reference point ref. The reference point ref may be an intersection of two lines perpendicular to each other, as shown in Fig. However, the present invention is not limited to this, and the reference point ref can also be expressed in a single dot form. Herein, when the original sound signal is filtered using the filtering coefficients stored in the brightness zone adjustment unit 11 shown in FIG. 5 as a default, the reference point ref is set such that the first speaker array image 800a and the second speaker array image 800b in FIG. The control device 3 receives the information about the filtering coefficient set by default or the current filtering coefficient from the brightness zone adjusting section 11 of the sound device 1 and the information about the current filtering coefficient from the first speaker array 30a and the second speaker array 30b The arrangement information can be received and displayed on the display 300 as shown in FIG.

Assuming that the position of the reference point ref shown in Fig. 8 corresponds to a specific position in the bright zone BZ shown in Fig. 6, the existing reference point ref shown in Fig. , The existing bright zone BZ is moved to the new bright zone BZ 'as shown in FIG.

Here, the movement of the new reference point ref 'from the existing reference point ref by the user input means movement of the reference point ref by the contact with the touch screen when the display 300 is the touch screen, When the touch panel 300 is not a touch screen, it may mean movement of a reference point ref by an external input device.

The control device 3 generates a control signal including movement information of the reference point ref and transmits it to the bright zone adjusting section 11 of the acoustic apparatus 1 shown in Fig. Here, the generated control signal can be generated in the sounder control application installed in the control device 3. [ The bright zone adjusting unit 11 of the acoustic device 1 updates the current filtering coefficient based on the control signal received from the control device 3 and filters the original sound signal using the updated filtering coefficient. Here, the meaning that the filtering coefficient is updated may be determined using the measured transfer function, and may be determined from a plurality of filtering coefficients assumed by the analysis of the usual space, Lt; / RTI > may replace the current filtering coefficient.

On the other hand, through the control device 3, the user can select the original sound signal inputted to and filtered by the audio equipment 1, and can also adjust the size of the bright zone. This will be described in detail with reference to FIG.

Referring to FIG. 10, the display 300 'of the control device 3 may further display the original sound selection image 1100 and / or the gain adjustment image 1300 in addition to those shown in FIG.

When the original sound selection image 1100 is selected in response to the user input, the control device 3 can display a plurality of original sound signals input to the sound device 1 on the display 300 '. For example, when the original sound signal generator 5 shown in FIG. 5 has a plurality of original sound signals supplied to the audio equipment 1 and a plurality of original sound signals are different signals, You can selectively select the original sound signal you want to hear through the Bright Zone. Alternatively, when the original sound signal provided to the audio device 1 in the original sound signal generating device 5 shown in FIG. 5 is multi-channel (5.1 channel, 6.1 channel, etc.), the control device 1 outputs multi- Display, and the user can select several desired channels among the multi-channels. When a specific original sound signal is selected in response to the additional user input, the control device 3 transmits a control signal including the information of the original sound signal selected by the sound device 1, (11) can filter only a specific original sound signal with a filtering coefficient according to a control signal.

If the gain adjustment image 1300 is selected in response to user input, the controller 3 may display a gain adjustment image for adjusting the size of the bright zone on the display 300 '. For example, if the gain adjustment image 1300 is selected, a gain adjustment bar may be displayed on the display 300 ', and the user may adjust the displayed gain adjustment bar. The gain of the user can be increased to increase the size of the bright zone, and the gain can be reduced to reduce the size of the bright zone. When the gain adjustment bar is adjusted in response to the additional user input, the control device 3 transmits a control signal including information of the gain value adjusted by the sound device 1, The controller 11 can adjust the gain of the sound output from the first speaker array 30a and the second speaker array 30b according to the control signal.

11 is a diagram showing that the bright zone BZ '' is enlarged from the bright zone BZ shown in FIG. 6 when the gain adjustment image 1300 is executed in response to a user input to increase the gain .

In addition, the user can select the type and the space type of the speaker array through the control device 3.

Referring to FIG. 10, the display 300 'of the control device 3 may further display the speaker array type selection image 1500 and / or the space type selection image 1700 in addition to those shown in FIG.

When the speaker array type selection image 1500 is selected in response to user input, the control device 3 can display various types of speaker arrays on the display 300 '. For example, if the speaker arrays 30a and 30b of the audio apparatus 1 shown in FIG. 5 are of the '-' character arrangement type as shown in FIG. 4, the 'A' , 'C' array type, 'U' character array type, 'O' character array type, and 'ㅁ' character array type. When a type of any one of the speaker arrays is selected by the additional user input, the control device 3 transmits a control signal including the type information of the selected speaker array to the audio equipment 1. Upon receiving the control signal including the type information of the speaker array, the audio equipment 1 updates the current filtering coefficient to the filtering coefficient corresponding to the speaker array type based on the type information of the speaker array. Here, the meaning that the current filtering coefficient is updated to the filtering coefficient corresponding to the speaker array type may be determined using the measured transfer function, and among the various filtering coefficients assumed by the analysis on the conventional space, The predetermined filtering coefficient corresponding to the control signal received from the speaker array 3, i.e., corresponding to the speaker array type, may replace the current filtering coefficient. Here, it can be assumed that the acoustic device 1 stores various filtering coefficients previously assumed by the analysis of a typical space for each speaker array type.

When the spatial type selection image 1700 is selected in response to the user input, the control device 3 can display various types of space on the display 300 '. For example, the size of various spaces (3 * 3/5 * 5/10 * 10) can be displayed. When a type of space is selected by an additional user input, the control device 3 transmits a control signal including the type information of the selected space to the audio equipment 1. [ Receiving the control signal including the type information of the space, the acoustic device 1 updates the current filtering coefficient to the filtering coefficient corresponding to the corresponding space type based on the type information of the space. Here, the meaning that the current filtering coefficient is updated with the filtering coefficient corresponding to the corresponding space type may be determined using the measured transfer function, and it may be determined from among the various filtering coefficients assumed by the analysis on the conventional space 3, that is, a predetermined filtering coefficient corresponding to the corresponding space type may replace the current filtering coefficient. Here, it can be assumed that the acoustic apparatus 1 previously stores various filtering coefficients assumed by an analysis of a typical space according to the spatial type.

4 to 5, the multi-channel decoder 13 decodes the filtered sound source signal provided from the bright zone adjusting unit 11 and the multi-channel amplifier 15 decodes the multi-channel decoder 13, And transmits the amplified sound signal to the first and second speaker arrays 30a and 30b.

The main body 10 may further include a power supply unit (not shown) and a communication unit (not shown) in addition to the brightness zone adjustment unit 11, the multi-channel decoder 13 and the multi-channel amplifier 15 shown in FIG. have.

A power supply unit (not shown) provides power for driving the audio equipment 1, and can be supplied with power from the outside or a battery.

The communication unit (not shown) is connected to the control device 3 shown in FIG. 5 by wire or wirelessly, exchanges data with each other, and is connected to the original sound signal generating device 5 shown in FIG. 5 by wire or wireless, (An arbitrary sound to be heard in the bright zone BZ shown in Fig. 2) from the generator 5.

The main body 10 may further include various components for driving the audio equipment 1 in addition to the power supply unit (not shown) and the communication unit (not shown).

The first speaker array 30a converts the first filtered sound source signal received from the multi-channel amplifier 15 of the main body 10 into sound and outputs the sound. The first speaker array 30a may be a plurality of speakers arranged in a line. The plurality of speakers may be arranged to radiate sound in one direction (d2).

The second speaker array 30b converts the second filtered sound source signal received from the multi-channel amplifier 15 of the main body 10 into sound and outputs the sound. The second speaker array 30b may be a plurality of speakers arranged in a line. The plurality of speakers may be arranged to radiate sound in one direction (d2).

A plurality of speakers of the first speaker array 30a are arranged long in one direction d1 on one side of the main body 10 and a plurality of speakers of the second speaker array 30b are arranged on the other side In a direction opposite to the one direction (d1).

A plurality of speakers of the first speaker array 30a and the second speaker array 30b are arranged long in one direction d2.

The number of the plurality of speakers of the first speaker array 30a and the number of the plurality of speakers of the second speaker array 30b may be different from each other. The number of the plurality of speakers of the first speaker array 30a and the number of the plurality of speakers of the second speaker array 30b may be adjusted according to the user's selection. In addition, although the number of the plurality of speakers of the first speaker array 30a and the number of the plurality of speakers of the second speaker array 30b are the same, the number of actually used speakers may be different according to the user's selection.

The first speaker array 30a and the second speaker array 30b may be disposed apart from the main body 10, though they are not shown in separate drawings. In this case, the first speaker array 30a and the second speaker array 30b communicate with the main body 10 in a wired or wireless manner to receive a filtered sound source signal to be radiated, and convert the received filtered sound source signal into sound And output it.

The acoustic device 1 according to the embodiment of the present invention may further include an auxiliary speaker array in addition to the first speaker array 30a and the second speaker array 30b. The auxiliary speaker array may be further connected to at least one of the first speaker array 30a and the second speaker array 30b or may be connected to the first speaker array 30a and the second speaker array 30b independently Or may be connected to the body 10 directly or indirectly. The auxiliary speaker array is mounted on the audio apparatus 1 shown in FIG. 4, and the auxiliary speaker array is divided into a '-' character arrangement type as shown in FIG. 4, an 'A' character arrangement type not shown in a separate drawing, Array type, 'U' character array type, 'O' character array type, and 'ㅁ' character array type. The user can individually configure the speaker array type using one or a plurality of auxiliary speaker arrays that he / she desires, and as described above, the display 300 'of the control device 3 shown in Fig. 10 Speaker Array Type Selection By selecting image 1500, you can select the speaker array type that is the same as or similar to the speaker array type you have configured. Then, the acoustic device 1 receives the control signal from the control device 3, and can update (or change) the existing filtering coefficient set as the default value to the filtering coefficient corresponding to the selected speaker array type. Here, the updating of the filtering coefficient may be performed by measurement of the transfer function. It is also possible that the filtering coefficient corresponding to the speaker array type among the previously stored filtering coefficients assumed by the analysis of the usual space replaces the current filtering coefficient It is possible.

On the other hand, when one or more auxiliary speaker arrays are connected to the main body 10 or the first speaker array 30a and the second speaker array 30b, the sounder 1 detects one or a plurality of auxiliary speaker arrays connected thereto And transmit the control signal including the auxiliary speaker array detection information to the control device 3. [ The control device 3 receiving this can display an auxiliary speaker array and a corresponding auxiliary speaker array image on the display 300 '. Here, the audio equipment 1 can update the current filtering coefficient based on the detected auxiliary speaker array detection information. Here, the update of the filtering coefficient may be performed by measurement of the transfer function. It is also possible that the filtering coefficient corresponding to the auxiliary speaker array among the preliminarily stored filtering coefficients assumed by the analysis on the usual space replaces the current filtering coefficient It is possible.

Referring to FIG. 5, the original sound signal generating device 5 provides the original sound signal to the sound device 1. The original sound signal means any sound to be heard in the bright zone BZ shown in Fig.

The original sound signal generating device 5 includes various electronic devices such as TV, audio, PC, smart phone and tablet. Also, the original sound signal generating device 5 may be a predetermined server connected to the sound device 1 via the Internet.

The original sound signal generating device 5 may be connected to the sound device 1 by wire or may be wirelessly connected to the sound device 1 such as Bluetooth, Wi-Fi, and a home network service.

12 is a flowchart for explaining a method of adjusting a bright zone in an audio equipment according to an embodiment of the present invention.

5, a method of adjusting a bright zone in an acoustic apparatus according to an embodiment of the present invention is a method of adjusting a brightness zone of a sound source in accordance with a control signal from a control device 3, Updating 1210 the original sound signal from the original sound signal generating device 5 with an updated filtering coefficient 1220, and outputting the filtered sound source signal 1230.

The step 1210 of updating the filtering coefficient previously stored according to the control signal from the control device 3 may be performed in the bright zone adjusting unit 11. [ The meaning of updating the filtering coefficient may be determined by using the measured transfer function or by substituting the predetermined filtering coefficient corresponding to the control signal among the various filtering coefficients assumed by the analysis on the usual space It is possible to do. The control signal from the control device 3 includes movement information of the reference point ref. When the original sound signal is filtered by the previously stored filtering coefficients and output through the first and second speaker arrays 30a and 30b, the reference point ref is determined based on the first and second speaker arrays 30a and 30b It means the relative position of one bright zone.

The step 1220 of filtering the original sound signal from the original sound signal generating device 5 with the updated filtering coefficient may be performed in the bright zone adjusting unit 11. [

The step 1230 of outputting the filtered sound source signal may be performed through the multi-channel decoder 13, the multi-channel amplifier 15 and the first and second speaker arrays 30a and 30b.

According to the method of adjusting the brightness zone in the acoustic device according to the embodiment of the present invention, since the filtering coefficient stored in the default or previously stored is updated by the control signal from the control device 3, 7, the bright zone can be adjusted.

On the other hand, in the step 1210 of updating the filtering coefficient previously stored according to the control signal from the control device 3, the control signal from the control device 3 may include selection information of the original sound signal, Size information.

The embodiments described above can be implemented in the form of program instructions that can be executed through various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination.

The program instructions recorded on the computer-readable recording medium may be those specially designed and constructed for the present invention or may be those known to those skilled in the art of computer software.

Examples of the computer-readable recording medium include magnetic media such as a hard disk, a floppy disk and a magnetic tape, optical recording media such as CD-ROM and DVD, magneto-optical media such as a floptical disk, optical media), and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be configured to operate as one or more software modules for performing the process according to the present invention, and vice versa.

While the present invention has been described in terms of specific embodiments including the preferred embodiments thereof, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, will be. In addition, various structural and functional modifications can be made without departing from the scope and spirit of the present invention. Accordingly, the spirit and scope of the present invention may be understood broadly as described in the claims appended hereto.

1: sound equipment
10: Body
30a: first speaker array
30b: second speaker array

Claims (6)

A method of controlling a sound source apparatus, comprising: filtering a source sound signal received from an original sound signal generating apparatus with a filtering coefficient; outputting a filtered sound source signal through a speaker array to generate a bright zone having a sound pressure level equal to or higher than a preset threshold value; A method of controlling a sound device to be formed by using a control device communicating with the sound device and having at least one display,
The control device displays a speaker array image corresponding to the speaker array on the display and a reference point corresponding to the bright zone;
Generating a control signal including movement information of the reference point when the reference point is moved by user input;
Providing the control signal to the audio equipment and moving the bright zone so that the audio equipment corresponds to movement of the reference point;
Receiving arrangement information of the speaker array or the number of speaker arrays from the sound device; And
Changing the speaker array image displayed on the display in accordance with the array information of the speaker arrays received or the number of speaker arrays received;
And a control unit for controlling the sound device. The method according to claim 1,
Further comprising the step of the controller displaying an original sound selection image on the display,
Wherein the control signal further includes selection information of the original sound signal corresponding to the selected original sound signal,
Wherein the sound device selects an original sound signal corresponding to the selection information from a plurality of original sound signals received from the original sound signal generating device. The method according to claim 1,
Further comprising the step of the controller displaying a gain adjustment image on the display,
Wherein the control signal further includes size information of the bright zone corresponding to the selected gain value,
Wherein the acoustic device adjusts a gain of the filtered sound source signal output through the speaker array based on the size information. The method according to claim 1,
Further comprising the step of the controller displaying a speaker array type selection image on the display,
Wherein the control signal further comprises speaker array type information corresponding to the selected speaker array type,
Wherein the sounder updates the filtering coefficient with a filtering coefficient corresponding to the speaker array type information based on the speaker array type information. The method according to claim 1,
Further comprising the controller displaying a space type selection image on the display,
Wherein the control signal further includes space type information corresponding to the selected space type,
Wherein the sounder updates the filtering coefficient with a filtering coefficient corresponding to the space type information based on the space type information. A computer-readable recording medium having recorded thereon a program for executing the control method of any one of claims 1 to 5.

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