KR20150057770A - Apparatus and method for improving sound image through cross-configuration - Google Patents

Abstract

Disclosed is a sound-image localization improvement system and method for improving the sound images of stereo systems through cross arrangement. In the sound-image localization improvement system, a second speaker comprising a second left speaker and a second right speaker is arranged in a first stereo system comprising a first left speaker and a first right speaker; the second right speaker is arranged near the first left speaker; and the second left speaker is arranged near the first right speaker.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to a system and a method for improving sound localization through cross placement,

[0001] The present invention relates to a sound localization improvement system through cross placement, more particularly to a first stereo system composed of a first left speaker and a first right speaker, a second speaker consisting of a second left speaker and a second right speaker, To a sound image localization improvement system.

In acoustics, sound phase orthogonality refers to a stereo sound technique that positions a specific sound source felt by a human at a virtual position. Specifically, the position of the sound source of the two-channel stereo system is two, but the position of the sound source recognized by the human being is located in the middle of the speaker rather than the position of the speaker. Usually, this phenomenon is referred to as a sound image, and when the sound image can be perceived clearly, the sound image is expressed as good.

On the other hand, stereophonic technology can be classified into two types of recording technology and reproduction technology. Among them, the audio system of the reproduction technology includes a mono system with a large channel of 1.0, a stereo system with 2.0 channel And Surround system with more than 2.1 channels.

At this time, as shown in FIG. 1, all the audio systems except for the mono system have left and right directions. That is, the left and right speakers are arranged on the left and right so as to be symmetrical in the same reflection environment, assuming that the distance is equal to the distance between the listener and the two speakers, and the sound image position intended by the producer of the sound source is realized.

At this time, the sound source means an electrical signal in which a sound of reality is recorded, edited, and reaches a speaker through a player and an amplifier.

However, as shown in FIG. 3, under the actual conditions, the reflective environments around the left and right speakers are the same, and the distances between the viewer and the two speakers are almost impossible to be exactly the same. Therefore, it is difficult to realize accurate sound localization.

Thus, a surplus system such as a 5.1-channel or 7.1-channel system is formed to increase the number of loudspeakers and three-dimensionally array the loudspeakers around the listener. However, this is not an accurate implementation of sound localization Rather, as the number of speakers increases, it is difficult to achieve good sound localization.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a sound level localization apparatus and a sound level localization apparatus, And aims to provide a system for improving the sound localization through cross placement which can be applied to a surround system of 2.1 channels or more based on a stereo system as well as left and right speaker operation.

Another object of the present invention is to provide a sound localization improvement method capable of realizing sound phase localization irrespective of a reflection environment even under actual conditions and capable of improving the sound phase localization without changing the existing speaker itself or its position .

The present invention relates to a first stereo system 10 comprising a first left speaker 11 and a first right speaker 12 and a second speaker 20 comprising a second left speaker 21 and a second right speaker 22, A second left speaker 21 is disposed on the left side of the first right speaker 12 and a second left speaker 21 is disposed on the left side of the first right speaker 12, The distance d between the first left speaker 11 and the first right speaker 12 of the first stereo system 10 is determined by the distance between the first left speaker 11 and the second right speaker 22 And a distance d2 between the first right speaker 12 and the second left speaker 21. The distance d2 between the first right speaker 12 and the second left speaker 21 is not less than twice the distance d1 between the first right speaker 12 and the second left speaker 21. [

The first left and right speakers 11 and 12 of the first stereo system 10 may have a greater or equal output than the second left and right speakers 21 and 22 of the second speaker 20.

The first left and right speakers 11 and 12 of the first stereo system 10 may have the same acoustic characteristics as the second left and right speakers 21 and 22 of the second speaker 20 have.

In addition, the second left speaker 21 and the second right speaker 22 of the second speaker 20 may have the same acoustic characteristics.

According to another aspect of the present invention, there is provided a sound localization improvement method,

A first left speaker provided with a left audio signal and a first right speaker provided with a right audio signal such that the first left speaker and the first right speaker are symmetrically spaced by d symmetrically about the listener A method for improving a sound localization of a first stereo system,

A second right speaker provided with a right audio signal at a distance of d1 in the vicinity of the first left speaker of the first stereo system,

A second left speaker provided with a left audio signal at a distance of d2 in the vicinity of the first right speaker of the first stereo system,

Wherein a distance d between the first left speaker and the first right speaker of the first stereo system is a distance between the first left speaker of the first stereo system and the second right speaker of the second speaker and the distance d2 between the first right speaker of the first stereo system and the second left speaker of the second speaker is more than twice the distance d2 between the first right speaker of the first stereo system and the second left speaker of the second speaker.

As described above, according to the system and method for improving the sound localization according to the present invention, the sound localization can be realized irrespective of the left and right reflection environments in real conditions as well as abnormal conditions.

In addition, it is possible to improve the sound image localization by arranging the speakers crosswise without replacing the existing speakers or changing the arrangement thereof.

In addition, 2.0 channel stereo system, as well as left and right speaker separation is based on 2.1 channel or more can be applied to surround systems.

In addition, the speaker includes a headphone, an earphone, and an acoustic system of a car which can be reproduced, and the sound image localization through the cross placement according to the present invention can also be realized in the area.

1 is a schematic diagram of a conventional stereophonic audio system;
2 is a conceptual diagram of sound by a real environment and a stereo system;
3 is a conceptual diagram of a sound source by a stereo system of an abnormal condition and an actual condition;
4 is a schematic diagram of a system for improving a sound localization through cross placement according to the present invention.
5A and 5B are conceptual diagrams of a system for improving a sound localization through cross placement according to the present invention.
6A and 6B are schematic views illustrating a system for improving a sound localization through cross placement in a 5.1-channel and 7.1-channel surround system according to the present invention.
7 to 8 show other embodiments of a sound localization improvement system through cross placement according to the present invention.

The present invention will be described with reference to the accompanying drawings.

As shown in FIG. 1, the audio system of the stereo sound reproducing technology has three types of mono systems, which are largely 1.0 channel based on a channel, a stereo system which is 2.0 channels, and a surround system which is 2.1 channel or more Classification is possible.

The present invention can be applied not only to a stereo system of 2.0 channels but also to a surround channel system of 2.1 channel or more based on separate left and right speaker operation, and also to a front speaker and a rear speaker. For convenience of explanation, it is explained based on a 2.0 channel stereo system.

Meanwhile, according to the ITU-R (International Telecommunication Union Radio Communications Sector) Recommendation (ITU-R BS.1116.1), the left and right speakers constituting a stereo system have acoustical characteristics And the reproduction environment is defined as being symmetrical. That is, a pair of speakers is defined to be exactly symmetrical to left and right.

At this time, the left and right speakers refer to the speakers that reproduce the left and right sound sources, respectively, in the sound source of the stereo system.

The acoustical characteristics are defined as meaning output (sound pressure level) (dB), impedance (?), And reproduction frequency band (Hz).

Fig. 2 shows a conceptual diagram of sound by a real environment and a stereo system. That is, when there is a sound source in a real environment, the human ear is listening to both sides of the sound around the face. However, as the face becomes an obstacle, the right ear and the left ear hear more in each direction.

On the other hand, the left and right speakers of the stereo system mix the left and right sounds at a constant rate so as to cause the human's ear to be misunderstood using the actual circumstances of the environment.

At this time, in a stereo system under an abnormal condition in which the left and right speakers are symmetrically arranged in the same reflection environment as shown in the left side of FIG. 3, and the distances between the listener and the two speakers are the same, The dominant brain recognizes the space between the left and right speakers as a sound source. If the sound source caused by the illusion of the brain is recognized clearly, it is said that the sound image orientation is better as it is perceived.

On the other hand, in the stereo system under the actual condition shown in the right side of FIG. 3, the sound pressure of one side is higher than that of the other side because the reflective environment around the left and right speakers is not the same. Therefore, the sound heard in the human ear is inevitably prevalent in the sound recorded from one side. In this case, the brain recognizes the biased sound source as a sound source, and thereby the sound image position falls rapidly.

In order to solve the above problem, the system for improving the sound localization through the cross placement of the present invention includes a first stereo system 10 composed of a first left speaker 11 and a first right speaker 12, A second speaker 20 including a second left speaker 21 and a second right speaker 22 is disposed on the right side of the first left speaker 11 and a second right speaker 22 is provided on the right side of the first left speaker 11 , And a second left speaker (21) is provided on the left side of the first right speaker (12).

The human brain recognizes that there is a sound source in the direction of the sound heard first, and also recognizes the loudest sound when the same sound is simultaneously heard in the other direction. Also, when the sounds of the various directions are heard from the same direction, the loud sounds are recognized as a priority. The sound localization improvement system by cross placement according to the present invention is based on this basic principle.

At this time, it is assumed that the first left and right speakers of the first stereo system 10 have the same acoustic characteristics.

In addition, the second speaker 20 may be additionally disposed in the existing first stereo system 10, or may be reflected from the initial design stage.

Hereinafter, it is suggested that sound image localization can be implemented regardless of the reflection environment.

[Equation 1]

Evaluation Equation of Regenerated Sound Phase Saturation

:재생시 음상정위,

:제1스테레오 시스템의 음원이 가지는 음상정위,

:제1스테레오 시스템의 제1좌,우측 스피커 주위의 반사환경 변수,

:제1스테레오 시스템의 제1좌,우측 스피커의 음향학적 특성)(

: Sound localization during playback,

: The sound phase localization of the sound source of the first stereo system,

: Reflection environmental variables around the first left and right speakers of the first stereo system,

: Acoustic characteristics of the first left and right speakers of the first stereo system)

At this time, in the ideal environment,

,

인바,

,

Inver,

&Quot; (2) "

Evaluation of sound localization in cross placement

(left side)

On the left-hand side of the note when crossed, the characteristics of the speaker

(right)

In the case of the cross placement,

:교차배치시 음상정위,

:교차배치시 좌,우측의 음상정위,

; 제1스테레오 시스템의 제1좌,우측 스피커의 음향학적 특성,

:제2 스피커의 제2좌,우측 스피커의 음향학적 특성)(

: Sound localization in cross placement,

: In the cross placement, left and right image localization,

; The acoustic characteristics of the first left and right speakers of the first stereo system,

: Acoustic characteristics of the second left and right speakers of the second speaker)

(반사환경 변수)가 상쇄되고, 교차배치에 의한

(좌,우측의 음상정위)와

(제1스테레오 시스템의 음원이 가지는 음상정위)만이 변수로써, 존재하게 됨을 알 수 있다.
Through the above equations, in the sound phase localization improvement system by cross placement,

(Reflection environmental variable) is canceled, and by cross placement

(Left and right image localization) and

(Sound phase localization of the sound source of the first stereo system) exists as a variable.

및

가 0에 가까워질 수록 음상정위

가 커지는 것을 알 수 있다. 이것은 본 발명에 따른 음상정위 개선 시스템에 있어서 음상정위에 대한 영향력은 교차배치되는 스피커의 음향학적 특성에 의해 결정되는 것임을 의미한다. 여기서, 스피커의 음향학적 특성은 출력을 포함하는 것이므로, 교차배치되는 스피커의 출력을 조절함에 의해 음상정위를 구현할 수 있음을 알 수 있다.
Referring to the above equation,

And

Is closer to zero,

. This means that, in the sound localization improvement system according to the present invention, the influence on the sound presumption is determined by the acoustic characteristics of the cross-positioned speakers. Here, since the acoustic characteristics of the loudspeaker include the output, it can be understood that the sound level localization can be realized by adjusting the outputs of the loudspeakers arranged in an intersecting manner.

As a result, it is possible to realize the sound image localization irrespective of the abnormal conditions, as well as the actual reflection conditions, regardless of the left and right reflective environments. Further, the speakers installed in the stereo system do not need to be replaced, The orientation can be improved.

Specifically, the effect of improving the sound localization by cross placement is achieved by eliminating the influence of the environmental factors on the reproduced sound. Through the two left and right stereo systems created by introducing cross placement, the left and right sound image localities sufficiently affected by the reflection environment variable appear first, and it removes the reflection environment variable by replacing the sound source of the existing stereo system. Thus eliminating the loss of sound image localization due to the reflective environmental variables that can occur in a realistic reproduction environment.

For reference, according to Recommendation ITU-R (International Telecommunication Union Radio Communications Sector) Recommendation (ITU-R BS.1116.1), the ideal listening point of a stereo system is a straight line connecting left and right speakers Is the opposite of the equilateral triangle.

Therefore, according to the present invention, as shown in FIG. 5A, not only the viewing point P is generated by the first stereo system 10 but also the first and second left and right speakers 11 and 12 and the second left and right The audience points p1 and p2 are respectively generated on the left and right sides by the speakers 21 and 22, respectively.

On the other hand, the point of view by the second speaker 20 does not occur because the sound source flows left and right. This state is called inverse.

The first left and right speakers 11 and 12 of the first stereo system 10 are preferably equal to or greater than the second left and right speakers 21 and 22 of the second speaker 20 .

Meanwhile, the present invention sees the first stereo system 10 as a main sound source and the second speaker 20 as a subordinate sound source. If the relationship between the first stereo system 10 and the second speaker 20 is changed, a reverse phase occurs.

The following conditions are required for this kind of relationship.

1) The output of the loudspeakers arranged in a cross is less than or equal to the output of the loudspeaker.

2) The influence on the sound image by the cross placement is proportional to the output of the cross-positioned speaker. However, the output of a cross-positioned speaker should not be greater than the output of a normally placed speaker.

3) It is preferable that the outputs of the left and right speakers are the same in the cross placed speakers.

The first left and right speakers 11 and 12 of the first stereo system 10 preferably have the same acoustic characteristics as the second left and right speakers 21 and 22 of the second speaker 20 Do.

In Equation (2) above,

Inver,

The relationship is established.

(음향학적 특성)이 동일한 것이 항상 좋은 것은 아니며,

(반사환경 변수)에 의하여 유연하게 조절하는 것이 바람직하다.On the other hand, the second left speaker 21 and the second right speaker 22 of the second speaker 20 may have the same acoustic characteristics. However, as shown in Equation 2,

(Acoustic characteristics) are not always the same,

(Reflection environmental variable).

Therefore, it is preferable that the second left speaker 21 and the second right speaker 22 of the second speaker 20 have the same acoustic characteristics if the reflection environment variables are equal.

The distance d between the first left speaker 11 and the first right speaker 12 of the first stereo system 10 is greater than the distance d between the first left speaker 11 and the second right speaker 22. [ Is greater than the distance d1 and the distance d2 between the first right speaker 12 and the second left speaker 21 (d >> d1, d2).

의

(반사환경 변수)가 동일하다는 전제하에서 시작되는 것으로, 상기 제1좌측 스피커(11)와 제1우측 스피커(12) 사이의 거리(d)가 제1좌측 스피커(11)와 제2우측 스피커(22) 사이의 거리(d1)의 두배 이하가 되면, 오히려,

은

에 가까워지기 때문이다.Referring to the left side of Equation 2,

of

The distance d between the first left speaker 11 and the first right speaker 12 is greater than the distance d between the first left speaker 11 and the second right speaker 12 22 is less than twice the distance d1,

silver

.

FIGS. 6A and 7 are schematic views illustrating a system for improving the sound localization through cross placement in a 5.1-channel and 7.1-channel surround system according to the present invention, which is applied to a rear speaker as well as a front speaker.

5 and 6, when the left and right speakers of the second stereo system assume a straight line connecting between the left and right speakers of the first stereo system, that is, the first left speaker and the first right speaker of the first stereo system 1 stereo system of the first stereo system and the first right speaker on a straight line connecting the first left speaker and the first right speaker of the first stereo system.

Fig. 7 shows that the left and right speakers of the second stereo system are located outside the left and right speakers of the first stereo system.

Fig. 8 shows that the left and right speakers of the second stereo system are located above the left and right speakers of the first stereo system.

5 to 8 is that the distance d between the first left speaker 11 and the first right speaker 12 of the first stereo system 10 is greater than the distance d between the first left speaker 11 D1 and d2 between the first right speaker 11 and the second right speaker 22 and the distance d2 between the first right speaker 12 and the second left speaker 21, , And more preferably twice or more.

As described above, the present invention can be applied to a 2.0 channel stereo system, as well as a 2.1 channel surround system based on left and right speaker operation.

In addition, the speaker includes a headphone, an earphone, and an acoustic system of a car that can be reproduced, and the sound image localization through the cross placement according to the present invention can be implemented in the area.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

10: first stereo system 11: first left speaker
12: first right speaker 20: second speaker
21: second left speaker 22: second right speaker

Claims (13)

A first left speaker provided with a left audio signal and a first right speaker provided with a right audio signal, the first left speaker and the first right speaker being arranged symmetrically symmetrically about a listener, ; And
A second speaker having a second left speaker provided with a left audio signal and a second right speaker provided with a right audio signal, the second left speaker and the second right speaker being symmetrically arranged left and right about a listener; / RTI >
Wherein the second right speaker of the second speaker is disposed on the right side of the first left speaker of the first stereo system and the second right speaker of the second speaker is disposed on the left side of the first right speaker of the first stereo system, A second left speaker is disposed,
Wherein a distance d between the first left speaker and the first right speaker of the first stereo system is a distance between the first left speaker of the first stereo system and the second right speaker of the second speaker d1) of the first stereo system and the distance (d2) between the first right speaker of the first stereo system and the second left speaker of the second speaker.
The method according to claim 1,
Wherein the first and second left and right speakers of the first stereo system are equal to or greater than the second left and right speakers of the second speaker.

The method according to claim 1,
Wherein the first left and right speakers of the first stereo system have the same acoustic characteristics as the second left and right speakers of the second speaker.
The method according to claim 1,
Wherein the second left speaker and the second right speaker of the second speaker have the same acoustic characteristics.
A first left speaker provided with a left audio signal and a first right speaker provided with a right audio signal such that the first left speaker and the first right speaker are symmetrically spaced by d symmetrically about the listener A first stereo system arranged; And
A second speaker having a second left speaker provided with a left audio signal and a second right speaker provided with a right audio signal, the second left speaker and the second right speaker being symmetrically arranged left and right about a listener; / RTI >
Here, the second right speaker of the second speaker is disposed at a distance of d1 in the vicinity of the first left speaker of the first stereo system, and the second right speaker of the second stereo speaker is located near the first right speaker of the first stereo system the second left speaker of the second speaker is disposed at a distance of d2,
Wherein a distance d between the first left speaker and the first right speaker of the first stereo system is a distance between the first left speaker of the first stereo system and the second right speaker of the second speaker d1) of the first stereo system and the distance (d2) between the first right speaker of the first stereo system and the second left speaker of the second speaker.
6. The method of claim 5,
Wherein the first and second left and right speakers of the first stereo system are equal to or greater than the second left and right speakers of the second speaker.
6. The method of claim 5,
Wherein the first left and right speakers of the first stereo system have the same acoustic characteristics as the second left and right speakers of the second speaker.
6. The method of claim 5,
Wherein the second left speaker and the second right speaker of the second speaker have the same acoustic characteristics.
A first left speaker provided with a left audio signal and a first right speaker provided with a right audio signal such that the first left speaker and the first right speaker are symmetrically spaced by d symmetrically about the listener A method for improving a sound localization of a first stereo system,
A second right speaker provided with a right audio signal at a distance of d1 in the vicinity of the first left speaker of the first stereo system,
A second left speaker provided with a left audio signal at a distance of d2 in the vicinity of the first right speaker of the first stereo system,
Wherein a distance d between the first left speaker and the first right speaker of the first stereo system is a distance between the first left speaker of the first stereo system and the second right speaker of the second speaker d1) and a distance (d2) between the first right speaker of the first stereo system and the second left speaker of the second speaker is at least twice the distance d2 between the first right speaker of the first stereo system and the second left speaker of the second speaker.
The speaker system according to claim 9, wherein, assuming a virtual straight line connecting the second right speaker and the second left speaker, the second right speaker and the second left speaker respectively correspond to the first left speaker and the first right speaker Wherein the sound localization improving means is disposed inside the speaker.
The speaker system according to claim 9, wherein, assuming a virtual straight line connecting the second right speaker and the second left speaker, the second right speaker and the second left speaker respectively correspond to the first left speaker and the first right speaker Wherein the sound localization improving means is disposed outside the speaker.
10. The method of claim 9, wherein the second right speaker and the second left speaker are disposed above the first left speaker and the first right speaker, respectively.
10. The method of claim 9, wherein the sound phase localization is improved by adjusting outputs of the second left speaker and the second right speaker.

Images