KR101334166B1 - Improved sound image localization system through cross configuring - Google Patents

Abstract

The present invention relates to a system for improving sound localization through cross arrangement. A second speaker comprising a second left speaker and a second right speaker is installed in a first stereo system comprising a first left speaker and a first right speaker. The second right speaker is installed in the right side of the first left speaker. The second left speaker is installed in the left side of the first right speaker. [Reference numerals] (AA) Audience

Description

Sound Dislocation Improvement System through Cross Placement {IMPROVED SOUND IMAGE LOCALIZATION SYSTEM THROUGH CROSS CONFIGURING}

The present invention relates to a system for improving stereophonic sound through a cross arrangement. Specifically, a second speaker including a second left speaker and a second right speaker intersects with a first stereo system including a first left speaker and a first right speaker. It relates to a dislocation enhancement system that is deployed.

In acoustics, sound stereoposition refers to stereoscopic sound technology that locates a particular sound source that a human feels at a virtual position. Specifically, two sound sources of a stereo system are recognized as two, but a human sound source is recognized as being located somewhere in the middle of the speaker, not the position of the speaker. Generally, this phenomenon is called sound image, and when the sound image can be clearly recognized, the sound image position is expressed as good.

On the other hand, three-dimensional sound technology can be classified into two types, recording technology and playback technology. Among them, the audio system of the reproduction technology is a mono system of 1.0 channels and a stereo system of 2.0 channels. And a surround system having 2.1 channels or more.

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

In this case, the sound source refers to an electrical signal in which the sound of reality is recorded and edited and reaches the speaker through the player and the amplifier.

However, as shown in FIG. 3, in actual conditions, the reflection environment around the left and right speakers is the same, and the distance between the viewer and the two speakers is also almost impossible to be exactly the same. As a result, it is difficult to realize accurate sound standing.

Thus, by forming a surround system such as 5.1 channel and 7.1 channel, the number of speakers is increased, and the speakers are three-dimensionally arranged around the listener to realize a sense of presence, but this is not an accurate sound image positioning. Rather, the greater the number of speakers, the harder it is to implement sound stereotypes.

The present invention has been made to solve the problems described above, it is possible to implement the sound phase in the actual conditions irrespective of the reflection environment, it is possible to improve the sound phase without the need to change the speaker itself or its existing installed position. In addition, the purpose of the present invention is to provide a stereo phase improvement system through cross-alignment that can be applied to a surround system of 2.1 channels or more based on a speaker system separated into left and right as well as a stereo system.

The present invention provides a second speaker 20 comprising a second left speaker 21 and a second right speaker 22 in a first stereo system 10 including a first left speaker 11 and a first right speaker 12. ) Is disposed to face the listener, the second right speaker 22 is provided on the right side of the first left speaker 11, and the second left speaker 21 is located 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 may be provided by the first left speaker 11 and the second right speaker 22. It is characterized in that more than twice the distance (d1) between the distance (d1) and the distance (d2) between the first right speaker 12 and the second left speaker 21.

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

In addition, 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.

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As described above, according to the system for improving the sound dislocation through the cross arrangement according to the present invention, there is an effect that the sound dislocation can be realized regardless of the reflection environment of the left and right sides in the abnormal condition as well as the actual condition.

In addition, it is possible to improve the sound phase by arranging the speaker cross without having to replace the existing speaker itself or change its arrangement.

In addition, there is an effect that can be applied to a surround system of 2.1 channels or more based on speaker operation divided into left and right as well as a 2.0 channel stereo system.

The speaker includes a reproducible headphone, earphone, and a sound system of an automobile, and has an effect of realizing sound stereoposition through cross-alignment according to the present invention in the region.

1 is a schematic diagram of a conventional stereophonic technology 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 abnormal conditions and actual conditions.
4 is a schematic diagram of a system for improving stereophonic position through cross-batch according to the present invention;
Figures 5a and 5b is a conceptual diagram of a stereophonic improvement system through the cross arrangement according to the present invention.
6A and 6B are schematic diagrams of a 5.1-channel and 7.1-channel surround system of a stereophonic enhancement system through cross-location 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 stereoscopic sound reproduction technology is divided into three types: a mono system having 1.0 channels, a stereo system having 2.0 channels, and a surround system having 2.1 channels or more. Classification is possible.

The present invention can be applied to a surround system of 2.1 channels or more based on speaker operation separated into left and right as well as a stereo system of 2.0 channels, but will be described based on a stereo system for convenience of description.

Meanwhile, the present invention has acoustic characteristics of left and right speakers constituting a stereo system according to the recommendation (ITU-R BS.1116.1) of ITU-R (International Telecommunication Union Radio communications Sector). It is defined as the same, and the reproduction environment is symmetrical. That is, a pair of speakers is defined as being exactly symmetrical left and right.

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

In addition, the said acoustic characteristic is defined as meaning an output (sound pressure level) (dB), an impedance (ohm), and a reproduction frequency band (Hz).

2 illustrates a conceptual diagram of sound by a real environment and a stereo system. That is, when there is a sound source in the real environment, the human ear hears both sounds centering on the face. However, the face is a distraction, so the right and left ears hear more in each direction.

On the other hand, the left and right speakers of the stereo system sends out a mixture of left and right sounds at a constant rate so that the ear of the human body is mistaken using the situation of the real environment.

In this case, as shown in the left side of FIG. 3, the left and right speakers are arranged on the left and right sides so as to be symmetrical in the same reflection environment, and in the stereo system under the abnormal condition when the distance between the listener and the two speakers is the same, The dominant brain perceives the space between the left and right speakers as a sound source. If the sound source caused by the brain's illusion is clearly recognized, it is said that the stereophonic position is better as it is recognized.

On the other hand, in the stereo system under the actual conditions shown on the right side of FIG. 3, since the reflection environment around the left and right speakers is not the same, the sound pressure of one side is higher than the other side. Therefore, the sound coming into the ear of the human body can not only be biased to the sound recorded on one side, in this case, the brain recognizes the biased side as the sound source, thereby the sound stereotactic sharply falls.

In order to solve the above-mentioned problem, the stereo phase improvement system using the cross arrangement of the present invention includes a first stereo system 10 including a first left speaker 11 and a first right speaker 12 as shown in FIG. 4. The second speaker 20 is composed of a second left speaker 21 and the second right speaker 22 is disposed, the second right speaker 22 is provided on the right side of the first left speaker 11 The second left speaker 21 is provided on the left side of the first right speaker 12.

In this case, the first left and right speakers of the first stereo system 10 are assumed to have the same acoustic characteristics.

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

Hereinafter, the grounds for implementing sound stereolocation irrespective of the reflection environment will be presented.

[Equation 1]

Evaluation formula of the reproduction sound station

:재생시 음상정위,

:제1스테레오 시스템의 음원이 가지는 음상정위,

:제1스테레오 시스템의 제1좌,우측 스퍼커 주위의 반사환경 변수,

:제1스테레오 시스템의 제1좌,우측 스퍼커의 음향학적 특성)(

: Piculation in playback,

: Sound image positioning that a sound source of the first stereo system has,

: Reflection environment variables around the first left and right spurs of the first stereo system,

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

In this case, the stereo image in stereo playback is ideal.

,

인바,

,

Inba,

&Quot; (2) "

Evaluation of Phonetic Positions in Cross Placement

(left side)

The characteristics of the speaker in the left sound phase in the cross arrangement

(right)

The characteristics of the speaker in the right sound phase in the cross arrangement

:교차배치시 음상정위,

:교차배치시 좌,우측의 음상정위,

:제2 스피커의 제2좌,우측 스피커의 음향학적 특성)(

: Acoustic Dislocation in Cross Placement,

: Acoustic stereotypes on left and right when crossing

: 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.The system for improving the stereophonic position by the cross arrangement through the above equation in the stereoscopic evaluation,

(Reflective environment variables) are canceled and

(Left and right phonetic stereotactic) and

It can be seen that only the (sound phase orientation of the sound source of the first stereo system) exists as a variable.

As a result, it is possible to implement sound image positioning regardless of the reflecting environment of the left and right sides under abnormal conditions as well as actual conditions, and additionally cross-place the speakers without having to replace the speaker itself or change the layout of the existing stereo system. Position can be improved.

In particular, the improvement of the phonological position by cross placement is achieved by eliminating the influence of environmental factors on the phonological position to be reproduced as much as possible. Through the two left and right stereo system created by the introduction of the crossover arrangement, the left and right sound phases that are sufficiently influenced by the reflection environment variable appear first, and it removes the reflection environment variable by replacing the sound source of the existing stereo system. This eliminates the loss of sound image due to reflection environment variables that can occur in realistic playback environments.

For reference, according to ITU-R (International Telecommunication Union Radio Communications Sector) recommendations (ITU-R BS.1116.1), the ideal listening point of a stereo system is the opposite side of the equilateral triangle with the speaker on one side. It is a vertex.

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

On the other hand, the reason that the viewing point does not occur by the second speaker 20 is because the sound source flows in the left and right directions. This state is called reversed phase.

As described above, the first left and right speakers 11 and 12 of the first stereo system 10 have an output greater than or equal to that of the second left and right speakers 21 and 22 of the second speaker 20. It is preferable.

The present invention sees the first stereo system 10 as the main sound source, and assumes the second speaker 20 as the longitudinal sound source. If the main slave relationship between the first stereo system 10 and the second speaker 20 is changed, the reverse phase occurs.

In addition, it is preferable that the first left and right speakers 11 and 12 of the first stereo system 10 have the same acoustic characteristics as the second left and right speakers 21 and 22 of the second speaker 20. Do.

In Equation 2,

Inba,

This is because the relationship between is established.

(음향학적 특성)이 동일한 것이 항상 좋은 것은 아니며,

(반사환경 변수)에 의하여 유연하게 조절하는 것이 바람직하다.Meanwhile, 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 above,

The same (acoustic characteristics) is not always good,

It is preferable to adjust flexibly by (reflection environment variable).

Therefore, if the reflection environment variables are equivalent, 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.

In addition, the distance d between the first left speaker 11 and the first right speaker 12 of the first stereo system 10 is equal to the distance between the first left speaker 11 and the second right speaker 22. Preferably, the distance d1 and the distance d2 between the first right speaker 12 and the second left speaker 21 are two times or more.

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.When described based on the 'left' of Equation 2, this equation

of

(Reflection environment variable) starts on the same assumption that the distance d between the first left speaker 11 and the first right speaker 12 is the first left speaker 11 and the second right speaker ( 22) is less than twice the distance d1, rather,

silver

Because it is closer to.

On the other hand, as described above, the present invention is applicable to a surround system of 2.1 channels or more based on speaker operation divided into left and right sides as well as a 2.0 channel stereo system.

In addition, the speaker includes a reproducible headphone, earphone, and a sound system of a vehicle, and has an effect of realizing sound stereoposition through the cross arrangement according to the present invention.

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: The second left speaker 22: The second right speaker

Claims (5)

A first stereo system having a first left speaker provided with a left audio signal and a first right speaker provided with a right audio signal, wherein the first left speaker and the first right speaker are arranged symmetrically from side to side with respect to 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, wherein the second left speaker and the second right speaker are arranged symmetrically from side to side with respect to a listener; Including;
Here, the second right speaker of the second speaker is disposed to the right of the first left speaker of the first stereo system, and the second speaker of the second speaker to the left of the first right speaker of the first stereo system. The second left speaker is arranged,
The distance d between the first left speaker of the first stereo system and the first right speaker is the distance between the first left speaker of the first stereo system and the second right speaker of the second speaker d1) and at least two times the distance d2 between the first right speaker of the first stereo system and the second left speaker of the second speaker.
The method of claim 1,
And the first left and right speakers of the first stereo system have a greater output than or equal to the second left and right speakers of the second speaker.

The method of claim 1,
And 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 of claim 1,
And the second left speaker and the second right speaker of the second speaker have acoustic characteristics identical to each other.

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