KR20160098649A - Sweet spot setting device for speaker and method thereof - Google Patents
Sweet spot setting device for speaker and method thereof Download PDFInfo
- Publication number
- KR20160098649A KR20160098649A KR1020150020214A KR20150020214A KR20160098649A KR 20160098649 A KR20160098649 A KR 20160098649A KR 1020150020214 A KR1020150020214 A KR 1020150020214A KR 20150020214 A KR20150020214 A KR 20150020214A KR 20160098649 A KR20160098649 A KR 20160098649A
- Authority
- KR
- South Korea
- Prior art keywords
- speaker
- distance
- output
- user
- sound
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S3/00—Systems employing more than two channels, e.g. quadraphonic
- H04S3/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
- H04R2205/024—Positioning of loudspeaker enclosures for spatial sound reproduction
Abstract
The present invention relates to a speaker tuning apparatus and method for automatically optimizing audio output according to the position of a speaker and the position of a listener in an acoustic system having two or three channels of speakers and one or more microphones, (A) an induction part for inducing a predetermined output with a time difference to each of the speakers; (B) receiving an output sound pressure of each speaker input to the microphone, comparing the difference in sound pressure of each speaker, A calculation unit for calculating a calibration output ratio of each speaker such that a sweet spot is set at a specific point based on a distance or distance and direction information of each speaker at the calculated reference point; ) Adjusting the output ratio of each speaker in accordance with the calculated calibration output ratio information of each speaker And a spot setting apparatus and method.
Description
The present invention relates to a speaker tuning apparatus and method for automatically optimizing audio output according to a position of a speaker and a position of a listener in an acoustic system having two or three channels of speakers and one or more microphones.
At this time, the sound system includes not only a simple sound system but also a home theater system, a projection system, an HDTV, a digital TV, and a smart TV.
With the development of multimedia technology based on advanced digital signal processing technology, high quality, multi-function display devices (projection system, HDTV, digital TV, smart TV, etc.) of large screen are becoming popular. In keeping with the development of these visual aspects, the audio system also supports rich and realistic audio with multi-channel speakers such as 5.1 channel and 7.1 channel.
As is well known, a multi-channel speaker, especially a front channel (F · C), a front light (F · R), a front left (F · L), a rear light (R · R), a rear left · L) and a woofer (W · F) speaker. The audio system decodes the audio signal, converts it into a 5.1-channel signal, and outputs the signal of each channel to the corresponding speaker so that the listener can listen to the sound output through the speaker.
Optimizing the output of the audio system (including the A / V system) is a very important factor for ensuring three-dimensional and realistic sound. In the case of multi-channel audio systems, the sound / system specialist sets the setup position, audio output level, and delay time for each speaker when installing the first product. However, if you change the system position by moving or changing internal structure, I had to do the setting myself. However, it is very difficult and cumbersome for a non-expert user to set the position, output level and delay time of each speaker individually, so it is common to set the "approximate" in practice or all the speakers in a row in front. However, when using the audio system set to 'roughly', there is a problem such as feeling a sense of heterogeneity in the sound itself.
On the other hand, even when setting by a specialist, since the listener is set on the assumption that the listener is at the center position at the same distance from each speaker, when listening to the sound while moving to a position other than the center position of each speaker, Lt; / RTI >
Various techniques have been proposed to solve this problem.
When an audio system is set and an output value of each speaker is stored in advance in the state where the audio system is set, when a user-specific position is designated (for example, remote control operation), the output value of each speaker And outputting the extracted condition as a corresponding condition. However, this is also not realistic because it is necessary to set up a specialist in the beginning and the user has to perform a very complicated operation of storing the speaker output value by position when moving the speaker.
Open Patent Publication No. 10-2005-0056647 discloses a method of mounting a position sensor on each speaker, monitoring and tracking the position of the listener two-dimensionally using these position sensors, and detecting the positions of the front left and right speakers and the rear left and right speakers And an audio system for adaptively and automatically controlling the output level and the delay time. According to this, a special speaker equipped with a position sensor must be installed. In the beginning, it is necessary to set up a specialist, and when one speaker is moved, the whole system must be set again.
A method of rotating a speaker to fit a position of a user is disclosed in Japanese Laid-Open Patent Publication No. 10-2006-0028962 by a driving unit for rotating the speaker and a detection unit for detecting the movement of the user. According to this, there is a special speaker with a rotation driving part and a detecting part, and it does not mention about the output or the time delay according to the position of the user, but simply the direction of the speaker is different. Also, in this case, the initial setting is necessary, and if one speaker is moved or the direction changes, it should be set again.
That is, according to the conventional art as described above, the speaker setting operation is very difficult for ordinary users without the help of the sound / system expert. Therefore, most users can arrange the speakers roughly, And the sound system is utilized. Also, if the user does not change the setting condition, the sound quality is always changed according to the user's position by outputting the same sound even if the user's position is changed.
On the other hand, as the sound signal processing technology becomes more sophisticated, ordinary users who are not a movie theater or a high-end user can hear a magnificent and realistic sound even with a 2-channel or 3-channel speaker system.
The present invention relates to a speaker tuning apparatus and method for automatically optimizing an audio output and a delay time even if a position and distance of a speaker are changed in an acoustic system having two or three channels of speakers and a microphone.
The present invention also relates to a speaker tuning apparatus and method for automatically optimizing audio output and delay time even if a user's position and distance change in an acoustic system having two or three channels of speakers and a microphone.
According to an aspect of the present invention, there is provided an apparatus for setting a speaker-suite spot in an acoustic system having two or three channels of speakers and a microphone, the apparatus comprising: (A) an induction unit for inducing a predetermined output of each speaker; (B) receiving the output sound pressure of each speaker input to the microphone and comparing the difference of sound pressure of each speaker to calculate a distance, a distance and a direction of each speaker at a predetermined point, and (2) A calculation unit for calculating an output and a delay time of each speaker such that a sweet spot is set at a specific point based on distance or distance and direction information; (C) an adjusting unit for adjusting the output and delay time of each speaker according to the calculated output and delay time information of each speaker, and a method for setting a speaker-set spot using the same.
As described above, according to the present invention, since the sweet spot of the speaker is automatically controlled to be formed at a specific position even if the position of the speaker is changed, the user can listen to the optimum sound without any operation.
According to the present invention, even if the position of the user (celadon) changes, the sweet spot of the speaker is automatically controlled to be formed at the position where the user is located, so that the user can listen to the optimum sound at any position.
Accordingly, the present invention enables automatic speaker setting without the help of a sound / system expert.
1 is a conceptual diagram of an acoustic system having a 2-channel speaker and a microphone and a speaker-set spot setting apparatus according to the present invention;
Figs. 2A to 2C are conceptual diagrams showing examples of a planar positional relationship between a main body of a sound system, a speaker and a user, in an acoustic system having a detachable two-channel speaker and a microphone. Fig.
3 is a conceptual diagram showing an example of the planar positional relationship between the main body of the acoustic system, the speaker and the user in the acoustic system in which the left and right microphones ML and MR and the position detection unit C are mounted.
FIG. 4 is a flowchart illustrating steps of a speaker-set spot setting method using a speaker-set spot setting apparatus in the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail with reference to the accompanying drawings. It should be understood, however, that the appended drawings illustrate only the contents and scope of technology of the present invention, and the technical scope of the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the technical idea of the present invention based on these examples. It is also to be understood that when an element of a claim is referred to by reference to an element, it is for the purpose of illustration only and is not intended to limit the element.
In the present invention, the term "acoustic system" is a concept including not only a simple sound system but also various audio / video devices having a sound related device such as a home theater system, a projection system, an HDTV, a digital TV, and a smart TV.
As described above, the present invention relates to an apparatus and method for setting up a speaker-set spot in an acoustic system having two or three channels of speakers and one or more microphones including an induction unit, a calculation unit, and an adjustment unit.
≪ Invention on Speaker Sweet Spot Setting Apparatus in Acoustic System >
In the present invention, the speaker may be detachable or integral with the acoustic system integrally. If the speaker is a detachable speaker, it can include both wired and wireless.
In the present invention, the microphone may be mounted on the acoustic system, but the 'speaker sweep spot setting device' according to the present invention is included in the acoustic system, so that it does not preclude the microphone from being mounted on the speaker sweep spot setting device.
In the present invention, the guide unit serves to guide a predetermined output to each of the speakers with a time difference. At this time, the same output is preferable, but the output is not excluded because it can be corrected by calculation even if it is different.
(1) The sound pressure intensity sensed by the microphone with respect to the output sound pressure induced by each speaker is received, and the sound pressure difference of each speaker is compared with each other, and the sound pressure is measured at a predetermined reference point (for example, between the microphone and the microphone) (2) calculating the distance or the distance and direction of the speaker, (2) calculating the distance or distance and direction of the speaker at a predetermined point (for example, at a predetermined position on the center front surface of the acoustic system or the like) Calculate the calibration output ratio of each speaker so that the sweet spot is set.
The controller adjusts the output ratio of each speaker according to the calibration output ratio information of each speaker determined by the calculator.
In the present invention, 'adjusting the output' means adjusting the output of the speaker so that the same sound pressure is applied to each speaker when the sound source is the same sound source at a certain point by correcting the sound pressure loss due to the difference in distance between the specific point and each speaker.
On the other hand, the output sound pressure (W) (sound energy emitted per unit time) from the speaker (sound source), which is seen as a point sound source outputting a half spherical wave, the distance r away, The relationship can be expressed by the following equation.
The relationship between the velocity (v) of the sound wave and the time (t) of the speaker to the microphone can be expressed by the following equation.
FIG. 1 is a conceptual diagram of an acoustic system having a two-channel speaker and a microphone and a speaker-set spot setting apparatus according to the present invention in a sound system having a detachable two-channel speaker and a microphone, Are shown in Figs. 2A to 2C. Fig. 2A to 2C, the setting device according to the present invention is not shown. In the drawing, M denotes a microphone, S1 and S2 denote two speakers, U denotes a user, and a square denotes a sound system body.
Operation of the speaker-set-spot setting apparatus according to the present invention will be described with reference to FIG.
First, when the induction unit outputs a signal such that an output of, for example, 50 dB is output to S1, the sound pressure output from S1 is input to the microphone at, for example, 45 dB. Subsequently, when the induction unit outputs a signal such that an output of, for example, 50 db is output to S2 at a time difference, the sound pressure output from S2 is input to the microphone at, for example, 41 dB.
Next, the calculator compares the sound pressure differential (I 1 = 45, I 2 = 43) detected by the microphone with respect to the same output sound pressure (W = 50) derived from each speaker, Calculate the relative distances (r 1 , r 2 ) of the speakers.
According to this example, the distance ratio of the two speakers is r 2 / r 1 = 1.048.
Next, the output sound pressures (W 1 , W 2 ) are calculated such that the detected sound pressure I at a specific point becomes equal.
The control unit adjusts the output of each speaker in accordance with the relative speaker output ratios (W 1 , W 2 ) calculated from Equation (3). Assuming that the microphone is in a specific position in the above example, the calibration output ratio of the two speakers is W 2 / W 1 = 1.098. In other words, the output of the S2 speaker should be increased by about 10% compared to S1, so that the sweet spot is set at a specific position.
If necessary, the delay time can be calculated and corrected according to Equation 2. 'Adjusting the delay time' means correcting the difference of the sound arrival time according to the difference of distance between the specific point and each speaker, so that the output time of the speaker is adjusted so that the sound pressure is felt at the same moment at each speaker when the sound source is the same at a specific point It is regulated. However, since the difference in distance between each speaker and the user is usually within 1 to 2 m, the delay time is about 0.003 to 0.006 sec. Therefore, the delay time correction is not considered in the following.
On the other hand, when the microphone is one, the setting apparatus according to the present invention can not recognize, for example, the left and right speakers. Therefore, in this case, it is preferable to add (D) a toggle portion for replacing a signal input to the speaker by the user's selection.
The sound system according to the present invention may be combined with a video system such as a projection system, an HDTV, a digital TV, and a smart TV.
In the present invention, when there are two or more microphones of the acoustic system, the relative distance and direction of each speaker can be accurately calculated and corrected (refer to FIG. 3).
Fig. 3 shows an example in which the left and right microphones ML and MR are mounted. In this case, for example, the output of S1 or S2 is inputted to the left and right microphones ML and MR with different sound pressure and delay time. Therefore, the actual distance and direction of each speaker can be determined by the calculation of the calculation unit.
In the speaker-set-spot setting apparatus according to the present invention, the position at which the sweet spot is set is fixed to a position (user expected position) spaced from the front of the normal sound system by 2 to 3 m. Therefore, even if the position of the speaker is changed, the sweet spot of the speaker is automatically controlled to be formed at the user expected position, so that the user can listen to the optimum sound without any operation. However, if the user is in a location other than the expected location, the optimal sound is not provided.
Therefore, the present invention further includes a position detector for detecting the distance between the system user and the sound system, and the controller adjusts the output of each speaker so that the sweet spot is set at the position of the user detected by the position detector. It is desirable to be able to adjust the delay time. The sweet spot can be arbitrarily changed by adjusting the output (W1, W2) and the delay time of each speaker based on Equation 1 and Equation 2 above.
That is, when the current position of the user is detected by the position detection unit, the output (and delay time) of each speaker is controlled so that a sweet spot can be formed at the position of the user so that the user can feel the optimum sound.
At this time, the position detector may apply various sensors that are known at present. Smart electronic devices such as smart TVs have the ability to sense up to the user's motion, so they can use it. For example, in the setting apparatus according to the present invention, the position detection unit may be a camera system that recognizes a human face and its position and distance.
≪ Invention on Speaker Sweet Spot Setting Method in Acoustic System >
The present invention also relates to a speaker-set spot setting method using the speaker-set spot setting apparatus. This includes an output inducing step, a calibration output non-computing step, and an output ratio adjusting step.
In the present invention, the output inducing step is performed by the output inducing unit, and when the power of the sound system is turned on, a predetermined output is induced by giving a time difference to each speaker.
The calibration output non-calculating step of the calculation unit includes: (1) receiving the output sound pressure of each speaker input to the microphone, comparing the sound pressure difference of each speaker, calculating the distance or the distance and direction of each speaker at the reference point, ② Calculate the calibration output ratio of each speaker so that the sweet spot is set at a specific point based on the distance or distance and direction information of each speaker at the calculated reference point. At this time, the 'specific point' is generally a distance (user expected position) away from the front of the sound system by 2 to 3 m.
The step of adjusting the output ratio is performed by an adjusting unit, which adjusts the output ratio of each speaker according to the calculated correction output ratio information of each speaker.
The speaker set spot setting method using the speaker set spot setting apparatus further includes a position detecting unit for detecting the distance and direction of the system user at the reference point. The speaker set spot setting method includes the following steps: output inducing step, speaker positioning step, User position detection step, speaker-user distance direction determination step, calibration output non-calculation step, output ratio adjustment step (see FIG. 4).
First, when the power of the acoustic system is turned on, the induction unit induces a predetermined output with a time difference to each speaker (output inducing step). Then, the calculator receives the sound pressure of each speaker inputted to the microphone, compares the sound pressure difference of each speaker, and determines the distance, the distance and the direction of each speaker at the reference point (speaker positioning step).
In addition, the position detecting unit detects the distance, the distance and the direction of the system user at the reference point at predetermined time intervals when the power of the sound system is turned on (user position detecting step).
The calculation unit then determines the distance or the distance and direction between each speaker and the user from the distance or distance and direction information of each speaker at the reference point and the distance or distance and direction information of the system user The calibration output ratio of each speaker is calculated so that the sweet spot is set at the user position based on the distance or distance between each speaker and the user and the direction information.
The adjusting unit adjusts the output ratio of each speaker according to the calculated correction output ratio information of each speaker (the output ratio adjusting step).
However, when the degree of position change and the time are equal to or more than a predetermined threshold value (for example, when the user moves for more than 30 cm and stays for more than 5 seconds) It is also preferable to perform the output non-calculation step.
Claims (8)
(A) an induction unit for inducing a predetermined output of each speaker with a time difference;
(B) receiving the output sound pressure of each speaker input to the microphone and comparing the sound pressure difference of each speaker to calculate a distance or a distance and a direction of each speaker at a predetermined reference point, and (2) A calculation unit for calculating a calibration output ratio of each speaker such that a sweet spot is set at a specific point based on the distance or distance and the direction information of the speaker;
(C) Adjustment section for adjusting the output ratio of each speaker according to the calculated correction output ratio information of each speaker:
Wherein the speaker set spot setting device comprises:
(D) a toggle unit for replacing a signal input to the speaker by a user's selection;
Wherein the speaker set spot setting device further comprises:
The microphones are plural,
Wherein the calculation unit calculates the actual distance and direction of each speaker at the reference point.
Wherein the acoustic system is coupled to an imaging system.
And a position detector for detecting the distance and direction of the system user at the reference point,
Wherein the controller adjusts the output of each speaker so that the sweet spot is set at the position of the user detected by the position detector.
Wherein,
Wherein the camera system is a camera system for recognizing a human face, its position and distance.
(A) inducing a predetermined output of each speaker with a time difference when the power of the sound system is turned on;
(B) receiving the output sound pressure of each speaker inputted to the microphone and comparing the sound pressure difference of each speaker to calculate the distance or distance and direction of each speaker at the reference point, (2) calculating the distance, Calculating a calibration output ratio of each speaker such that a sweet spot is set at a specific point based on distance or distance and direction information;
(C) adjusting an output ratio of each speaker according to the calculated calibration output ratio information of each speaker;
Wherein the speaker-set spot setting method comprises the steps of:
(A) inducing a predetermined output of each speaker with a time difference when the power of the sound system is turned on;
(B) receiving the output sound pressure of each speaker inputted to the microphone and comparing the difference of sound pressure of each speaker to determine a distance, a distance and a direction of each speaker at the reference point;
(C) detecting the distance or direction and the direction of the system user at the reference point at predetermined time intervals when the power of the sound system is turned on;
(C) determining a distance, a distance and a direction between each speaker and a user from the distance or distance and direction information of each speaker at the reference point, and the distance or distance and direction information of the system user;
(D) calculating a calibration output ratio of each speaker such that a sweet spot is set at a user position based on a distance or a distance between each speaker and a user and direction information;
(E) adjusting the output ratio of each speaker according to the calculated calibration output ratio information of each speaker;
Wherein the speaker-set spot setting method comprises the steps of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150020214A KR20160098649A (en) | 2015-02-10 | 2015-02-10 | Sweet spot setting device for speaker and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020150020214A KR20160098649A (en) | 2015-02-10 | 2015-02-10 | Sweet spot setting device for speaker and method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR20160098649A true KR20160098649A (en) | 2016-08-19 |
Family
ID=56874748
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020150020214A KR20160098649A (en) | 2015-02-10 | 2015-02-10 | Sweet spot setting device for speaker and method thereof |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR20160098649A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101859951B1 (en) * | 2017-07-03 | 2018-05-21 | 김옥경 | Apparatus for controlling of vertical directivity pattern of speaker |
| CN108347673A (en) * | 2018-03-30 | 2018-07-31 | 上海与德科技有限公司 | A kind of control method of intelligent sound box, device, storage medium and intelligent sound box |
| US10306394B1 (en) | 2017-12-29 | 2019-05-28 | Samsung Electronics Co., Ltd. | Method of managing a plurality of devices |
| KR20230166372A (en) * | 2022-05-30 | 2023-12-07 | 엘지전자 주식회사 | A sound system and a method of controlling the sound system for sound optimization |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050032929A (en) | 2003-10-02 | 2005-04-08 | 엘지전자 주식회사 | Method and apparatus for controlling of (a) speaker system |
| KR20050056647A (en) | 2003-12-10 | 2005-06-16 | 주식회사 대우일렉트로닉스 | Apparatus and method for controlling output of speaker in multi channel audio system |
| KR20060028962A (en) | 2004-09-30 | 2006-04-04 | 엘지전자 주식회사 | Audio/video device capable auto controlling of speaker position and method for controlling auto speaker position thereof |
-
2015
- 2015-02-10 KR KR1020150020214A patent/KR20160098649A/en not_active Application Discontinuation
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050032929A (en) | 2003-10-02 | 2005-04-08 | 엘지전자 주식회사 | Method and apparatus for controlling of (a) speaker system |
| KR20050056647A (en) | 2003-12-10 | 2005-06-16 | 주식회사 대우일렉트로닉스 | Apparatus and method for controlling output of speaker in multi channel audio system |
| KR20060028962A (en) | 2004-09-30 | 2006-04-04 | 엘지전자 주식회사 | Audio/video device capable auto controlling of speaker position and method for controlling auto speaker position thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101859951B1 (en) * | 2017-07-03 | 2018-05-21 | 김옥경 | Apparatus for controlling of vertical directivity pattern of speaker |
| US10306394B1 (en) | 2017-12-29 | 2019-05-28 | Samsung Electronics Co., Ltd. | Method of managing a plurality of devices |
| CN108347673A (en) * | 2018-03-30 | 2018-07-31 | 上海与德科技有限公司 | A kind of control method of intelligent sound box, device, storage medium and intelligent sound box |
| KR20230166372A (en) * | 2022-05-30 | 2023-12-07 | 엘지전자 주식회사 | A sound system and a method of controlling the sound system for sound optimization |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9740279B2 (en) | Method for adjusting volume of a display device and a display device | |
| KR20200053459A (en) | Devices with enhanced audio | |
| US20130058503A1 (en) | Audio processing apparatus, audio processing method, and audio output apparatus | |
| KR102393798B1 (en) | Method and apparatus for processing audio signal | |
| US8630428B2 (en) | Display device and audio output device | |
| US11095976B2 (en) | Sound system with automatically adjustable relative driver orientation | |
| US20120128184A1 (en) | Display apparatus and sound control method of the display apparatus | |
| KR102060949B1 (en) | Method and apparatus of low power operation of hearing assistance | |
| JPWO2005091679A1 (en) | Audio output device, audio signal output adjustment method, audio signal output adjustment processing program, etc. | |
| KR20160098649A (en) | Sweet spot setting device for speaker and method thereof | |
| US20180302711A1 (en) | Speaker Position Detection System, Speaker Position Detection Device, and Speaker Position Detection Method | |
| US20120230525A1 (en) | Audio device and audio system | |
| JP2008072541A (en) | Audio device | |
| JP2008236397A (en) | Acoustic control system | |
| JP2005057545A (en) | Sound field controller and sound system | |
| JP2007243398A (en) | Television receiver | |
| JP2013236354A (en) | Acoustic system and speaker device | |
| KR101695840B1 (en) | System for automatic controlling digital tv volume based on loudness and the method thereof | |
| US10861465B1 (en) | Automatic determination of speaker locations | |
| JP2011188248A (en) | Audio amplifier | |
| JPH05137200A (en) | Automatic adjustment device for stereo sound volume balance | |
| KR20180014968A (en) | Apparatus and Method for Automatically Optimizing Volume Reflecting Deviation of Speaker | |
| US20130022204A1 (en) | Location detection using surround sound setup | |
| KR20140000108A (en) | 9.1 channel speaker system | |
| KR102609084B1 (en) | Electronic apparatus, method for controlling thereof and recording media thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E601 | Decision to refuse application |