Spatial position output control system for audio source providing multi-channel audio station listening space

Abstract

Disclosed in the present invention is a technical concept of a system comprising: a positioning unit that sets a predetermined listening space and forms virtual audio stations at a plurality of positions in the predetermined listening space; and an audio source processing unit that performs three-dimensional sound processing on an audio source outputted from a speaker disposed in a physical space, at a relative volume ratio according to a position of each virtual audio station in the listening space.

Description

A sound source spatial position output control system providing a multi-channel audio station listening space

[0001] The present invention relates to the field of spatial sound processing technology and stereoscopic sound systems, and more specifically, to a technology field concerning a spatial position output control system for a sound source that provides a multi-channel audio station listening space, wherein, in the playback of an object or sound source, a listening space is defined and a virtual audio station is placed to provide stereoscopic spatial sound by mapping the location of the sound source to the output of a physical speaker.

[0002]

[0003] Recently, the demand for immersive audio has been rapidly increasing across the content industry.

[0004] In particular, Dolby Atmos is becoming the standard format for the production of theatrical films and OTT content, including Netflix. Unlike movies or games, stereo formats are still common in music mixing.

[0005] However, the demand for realistic sound is increasing not only in video but also in music production to realize spatial sound.

[0006] In June 2021, Apple Music launched a spatial audio music streaming service based on Dolby Atmos. This marked the beginning of a new wave in music production and distribution systems.

[0007] Dolby Atmos is a leading spatial audio technology that utilizes vertical, horizontal, and front-to-back space to provide listeners with a more three-dimensional and immersive sound experience, and it is rapidly spreading in the video content market.

[0008] This trend is also being detected in live performances. In the past, optimal sound could only be heard from a small number of specific seats, but recently, new mixing systems are being applied to expand the range of the sweet spot and to express the positioning of instruments and the sense of space more effectively.

[0009] Technically, panning techniques are being developed to specify the location of sounds or express sound movement in sound mixing. Panning techniques mainly involve methods that utilize sound amplitude and time differences.

[0010] Furthermore, panning methods that combine or modify these two approaches are being utilized in immersive rendering engines. Recently, the combined use of these methods or the emergence of advanced techniques based on HRTF (Head-Related Transfer Function) have enabled the realization of more sophisticated spatial acoustics that even reflect the structure of the user's head and ears.

[0011] With the development of immersive audio rendering engines, these panning and spatial acoustic technologies are becoming more diverse.

[0012] As it has become possible to precisely specify the location of sound sources within a space and move them in real time, this technology is being expanded and applied not only to movies, games, and VR / AR, but also to various fields such as music, performances, and the metaverse.

[0013] However, spatial acoustic technologies currently used in the market still have limitations.

[0014] Among these, there is a physical problem in that the expected sense of space may vary depending on the user environment due to constraints on the number and placement of speakers in indoor settings.

[0015] In accordance with the expansion of the field of such acoustic technology and the need for application technology, various prior art documents show various applications and studies of spatial acoustics and 3D audio technology. For example, as a prior art document, there exists "Device and method for reproducing a multi-channel audio input signal as a 2-channel output and a recording medium having a program for performing the same (Registration No. 10-0608024, hereinafter referred to as Patent Document 1)."

[0016] The invention according to Patent Document 1 is designed to enable playback of a multi-channel audio input signal as a 2-channel output. It comprises a first filter unit for reducing the correlation between a first channel audio input signal and a second channel audio input signal among multi-channel audio input signals, thereby reducing the correlation between the two audio input signals; a virtual sound source generation unit for converting the first channel audio input signal and the second channel audio input signal output from the first filter unit into a virtual sound source at a predetermined location; and an output control unit for adjusting the first channel audio input signal and the second channel audio input signal, which have a change in output gain and a time delay, to match with the remaining channel audio input signal. By using only 2-channel output, it is possible to create a sense of three-dimensionality provided by a multi-channel speaker system, improve the sound localization, and create a sense of presence, thereby providing a more improved three-dimensional sound to the listener.

[0017] In addition, there also exists a "signal processing device and signal processing method providing spatial sense (Registration No. 10-1844336, hereinafter referred to as Patent Document 2)."

[0018] In the case of Patent Document 2, the signal processing device comprises: a reverberation effect application unit that applies a reverberation effect to a summed signal obtained by summing original signals corresponding to N sound source positions; a correlation removal unit that extracts reverberation signals corresponding to N sound source positions by removing the correlation from the summed signal to which the reverberation effect is applied; a panning information determination unit that determines panning information of the original signals; and a panning information application unit that applies the panning information to the reverberation signals.

[0019] Patent Document 2 describes a signal processing device that can generate a reverberation signal corresponding to multiple sound source locations by applying a reverberation effect to a summed signal obtained by summing original signals corresponding to multiple sound source locations, and then removing the correlation. Subsequently, the signal processing device can reflect the location information of the original signal by applying panning information derived from the original signal to the reverberation signal.

[0020] In addition, there exists a "horizontal perspective display (Publication No. 10-2007-0052260, hereinafter referred to as Patent Document 3)."

[0021] The display system according to Patent Document 3 discloses a three-dimensional display system comprising a three-dimensional horizontal perspective display and a 3D audio system, such as a two-ear simulation, that gives realism to the three-dimensional display.

[0022] In the case of Patent Document 3, the 3D display system further includes a curved mixed display unit that integrates a second display and various images. The multi-plane display surface provides convenience to the observer by adjusting various images and 3D sounds according to the observer's viewpoint and auditory point position.

[0023] Consequently, there is a need for technology capable of consistently implementing spatial acoustics regardless of the user environment, and performing spatial positioning and output normalization regardless of the number and placement of speakers.

[0024]

[0025] The spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention has been devised to solve the conventional problems described above and presents the following problem to be solved.

[0026] First, it aims to provide a system that offers consistent spatial acoustic reproduction regardless of the number and placement of speakers.

[0027] Second, realistic 3D audio is implemented to provide users with an enhanced sense of space.

[0028] Third, minimize sound quality degradation and maintain a sense of space.

[0029] The problems solved by the present invention are not limited to those mentioned above, and other problems not mentioned will be clearly understood by those skilled in the art from the description below.

[0030]

[0031] A spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention has the following means for solving the problem to be solved above.

[0032] A spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by comprising: a positioning unit that sets a predetermined listening space and forms a plurality of virtual audio stations at multiple positions on the predetermined listening space; and a sound source processing unit that processes a sound source output from a speaker provided on a physical space into a three-dimensional sound according to a relative volume ratio with respect to the position of the virtual audio station on the listening space.

[0033] A spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by including a sound source transmission unit that separates and transmits the signal of the stereoscopic sound processed by the sound source processing unit through the speaker.

[0034] The positioning unit of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by comprising: a space setting unit for setting the predetermined listening space; and a station forming unit for setting each position on the predetermined listening space and assigning the virtual audio station to the position.

[0035] The sound source processing unit of the spatial location output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by including a distance calculation unit that receives a signal of the sound source output from an object outputting the sound source and calculates a physical distance.

[0036] The sound source processing unit of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by including a sound source filtering unit that filters the stereoscopic sound for preset positions of the plurality of positions in the virtual audio station based on the physical distance calculated according to the distance calculation unit.

[0037] The predetermined listening space of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized in that a virtual spatial range is set as a 360-degree omnidirectional zone based on the position of the listener and can be selectively expanded or reduced.

[0038] The sound source transmission unit of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by comprising: a sound receiving unit that receives the stereoscopic sound filtered through the sound source filtering unit; and a sound source transmission unit that separates and transmits the stereoscopic sound to the speaker activated for the stereoscopic sound.

[0039] The sound source transmission unit of the spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by including an output balance control unit that makes the sum of the output volumes for the activated speakers equal to 1.

[0040] The sound source processing unit of the spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention may further include a position setting unit that selectively sets an output position where the stereoscopic sound is output based on the virtual audio station virtually placed in the predetermined listening space based on the listener.

[0041] The sound source processing unit of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be characterized by including a sound mixing unit that upmixes or downmixes the three-dimensional sound through coordinates regarding changes up to the left ear and right ear according to the output position on the predetermined listening space.

[0042]

[0043] The spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention, configured as described above, provides the following effects.

[0044] First, 360-degree omnidirectional spatial sound reproduction is possible regardless of the number and placement of speakers, making it applicable in various environments.

[0045] Second, it is possible to provide an enhanced sense of space by offering the listener a more realistic 3D audio experience.

[0046] Third, by adjusting the output sound so that the sum remains constant, sound quality degradation can be prevented and spatial awareness maintained, thereby enabling improvement in sound quality.

[0047] The effects of the present invention are not limited to those mentioned above, and other unmentioned effects will be clearly understood by those skilled in the art from the description below.

[0048]

[0049] FIG. 1 is a conceptual diagram of a spatial position output control system for a sound source that provides a multi-channel audio station listening space according to one embodiment of the present invention.

[0050] FIG. 2 is a second conceptual diagram of a spatial position output control system for a sound source that provides a multi-channel audio station listening space according to one embodiment of the present invention.

[0051] FIG. 3 is a conceptual diagram illustrating a system for controlling the spatial position output of a sound source that provides a multi-channel audio station listening space according to an embodiment of the present invention, wherein a speaker sound source is filtered by a sound source filtering unit and provided as three-dimensional sound.

[0052] FIG. 4 is a conceptual diagram illustrating that sound in a physical space is provided to a listener as three-dimensional sound through a sound source output unit in a system for controlling the spatial position output of a sound source that provides a multi-channel audio station listening space according to one embodiment of the present invention.

[0053] FIG. 5 is a conceptual diagram illustrating a distance calculation unit calculating a distance in a spatial position output control system of a sound source providing a multi-channel audio station listening space according to one embodiment of the present invention.

[0054] FIG. 6 is a block diagram illustrating the main configuration of a spatial position output control system for a sound source that provides a multi-channel audio station listening space according to one embodiment of the present invention.

[0055] FIG. 7 is a block diagram illustrating the sub-configuration of a positioning unit in a spatial position output control system of a sound source providing a multi-channel audio station listening space according to one embodiment of the present invention.

[0056] FIG. 8 is a block diagram illustrating the sub-configuration of a sound source processing unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention.

[0057] FIG. 9 is a block diagram illustrating the sub-configuration of a sound source transmission unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention.

[0058] FIGS. 10 to 11 are conceptual diagrams of a distance calculation unit in a spatial position output control system of a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention.

[0059] The spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention may be subject to various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that it includes all modifications, equivalents, and substitutions that fall within the technical spirit and scope of the present invention.

[0060] FIG. 1 is a conceptual diagram of a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 2 is a second conceptual diagram of a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 3 is a conceptual diagram illustrating that, in a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention, a speaker sound source is filtered by a sound source filtering unit and provided as three-dimensional sound. FIG. 4 is a conceptual diagram illustrating that, in a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention, sound in a physical space is provided to a listener as three-dimensional sound through a sound source transmission unit. FIG. 5 is a conceptual diagram illustrating that, in a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention, a distance calculation unit calculates a distance. FIG. 6 is a block diagram illustrating the main configuration of a spatial location output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 7 is a block diagram illustrating the sub-configuration of a positioning unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 8 is a block diagram illustrating the sub-configuration of a sound source processing unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 9 is a block diagram illustrating the sub-configuration of a sound source transmission unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention. FIG. 10 and 11 are conceptual diagrams of a distance calculation unit in a spatial position output control system for a sound source providing a multi-channel audio station listening space according to an embodiment of the present invention.

[0061] The spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention defines the listening space as a 360-degree circle as described above for the playback of an object or sound source, and is based on the fact that speakers are mapped to each position. In this case, when only the speakers that are activated—namely, the front left and right speakers, each of the two speakers—are activated, the panning is set to L+R=1, and the sum of the speakers is defined as 1 regardless of the number of speakers that increase thereafter.

[0062] At this time, the angle of the horizontal plane, rather than the vertical plane, is UPMIX or DOWN MIX by citing HRTF function values ​​and filter values ​​at intervals of 1 to 5 degrees. This enables 360-degree playback regardless of the number of speakers being played.

[0063] In other words, since the sum of the vector values ​​is 1, the present invention reads the position coordinates regardless of changes according to the number and position of the speakers, and passes the filtered HRTF coordinates through the vector function value to achieve speaker output.

[0064] A spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention comprises a positioning unit (100) and a sound source processing unit (200).

[0065] The positioning unit (100) is configured to set a predetermined listening space and form virtual audio stations at multiple positions on the predetermined listening space.

[0066] A predetermined listening space refers to a virtual spatial area where a listener perceives sound, and corresponds to a set space used as a standard for sound output and spatial sound effects implementation.

[0067] A predetermined listening zone can be set centering on the listener and may refer to an acoustic space surrounding the listener in a circular or spherical shape in three-dimensional space.

[0068] In the case of multiple positions, it refers to multiple virtual positions, where each point can correspond to a virtual starting point for the audio.

[0069] Multiple positions are points provided in three-dimensional space and may include radius and elevation information, and a specific position may be designated by X, Y, and Z.

[0070] The positions of multiple positions can be used as reference values ​​for spatial operations in subsequent sound source processing steps.

[0071] Multiple positions can be dynamically changed or created by user selection or automatic calculation by the system.

[0072] A virtual audio station refers to a virtual audio source located at a specific point within a virtual space.

[0073] It may correspond to a virtual object used as a sound source's point of origin or spatial reference coordinates, rather than a physical speaker.

[0074] In addition, it may correspond to a location different from the speaker where the actual sound is provided, and it may also serve to provide the spatial target location of the sound.

[0075] In the case of the sound source processing unit (200), the sound source output from the speaker provided in the physical space is processed into a three-dimensional sound at a relative volume ratio according to the position of the virtual audio station in the listening space.

[0076] In the case of physical space, it refers to a realistic three-dimensional space where the speaker is actually installed and exists.

[0077] A speaker is a device that converts audio signals into mechanical vibrations and sound waves, radiating them into the air so that a listener can hear them.

[0078] In the case of speakers, multiple units can be provided in a physical space and can output sound waves depending on activation.

[0079] In the case of a sound source, it may refer to the source of an acoustic signal and may correspond to data or an object corresponding to the source of sound that a listener hears.

[0080] In the case of spatial sound, it may refer to sound processed so that spatial information such as sound direction, distance, and height is assigned relative to the listener, allowing the listener to perceive the sound source as originating from a virtual audio station (a specific location) within a designated listening space.

[0081] Three-dimensional sound may correspond to a design that recognizes the placement of sound sources in all spatial directions, such as up and down, front and back, and left and right.

[0082] Relative volume may correspond to a volume ratio set between virtual audio stations, and may be a relative volume that allows the output volume to be adjusted according to the ratio of each other to implement specific sound effects or spatiality.

[0083] Relative volume may correspond to the ratio of the volume provided by the virtual audio station to the absolute size of the volume produced by each virtual audio station.

[0084] A spatial position output control system for a sound source providing a multi-channel audio station listening space according to the present invention may further include a sound source transmission unit (300).

[0085] In the case of the sound source transmission unit (300), the signal of the three-dimensional sound processed by the sound source processing unit (200) is separated and transmitted through a speaker.

[0086] The sound source output unit (300) receives and outputs a three-dimensional sound signal, which ultimately outputs the volume.

[0087] The sound source output unit (300) outputs a spatial processing result, but converts it into an individual output signal according to the virtual audio station and outputs it.

[0088] The sound source output unit (300) can output a three-dimensional sound signal through a physical speaker, or provide the effect of sound being provided to the listener from a virtual audio station.

[0089] The positioning unit (100) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to include a space setting unit (110) and a station forming unit (120).

[0090] The space setting unit (110) sets a predetermined listening space.

[0091] The station forming unit (120) sets each position on a predetermined listening space and assigns a virtual audio station to the position.

[0092] The space setting unit (110) sets a three-dimensional listening space and can be set based on spatial variables such as radius, elevation, and azimuth corresponding to the listening space.

[0093] The station forming part (120) may mean that a location in virtual space is designated based on arbitrary coordinates (x,y,z) within the listening space.

[0094] Each position can be formed as a point where a virtual sound source can be generated.

[0095] The number of stations within the listening space can be generated according to the purpose.

[0096] The sound source processing unit (200) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to include a distance calculation unit (210) and a sound source filtering unit (220).

[0097] In the case of the distance calculation unit (210), the physical distance is calculated by receiving the signal of the sound source output from the object that outputs the sound source.

[0098] The distance calculation unit (210) extracts the current location coordinates of the sound source.

[0099] The distance calculation unit (210) can also calculate the physical distance to the virtual audio station based on information about the current location where the sound source is output.

[0100] The calculated distance value is transmitted to the subsequent sound source filtering unit (220).

[0101] In the case of the sound source filtering unit (220), it is configured to filter into three-dimensional sound for multiple preset positions in the virtual audio station based on the physical distance calculated according to the distance calculation unit (210).

[0102] The sound source filtering unit (220) performs filtering to provide three-dimensional sound in a space that reflects distance, location, and directionality.

[0103] The sound source filtering unit (220) is provided to maintain a volume balance in order to provide an overall output level before moving to the final output stage.

[0104] A predetermined listening space of a sound source spatial position output control system providing a multi-channel audio station listening space according to the present invention may have a virtual spatial range set as a 360-degree omnidirectional zone based on the listener's position and may be selectively expandable or contractable.

[0105] A predetermined listening space is set as a three-dimensional space that includes up, down, front, back, left, and right, going beyond a simple two-dimensional plane, and may correspond to a space designed based on the listener.

[0106] A predetermined listening space is conceptually established and corresponds to a virtual space that is not visually verifiable or fixed.

[0107] In addition, for a given listening space, the radius and spatial range can be freely expanded or contracted according to the listening environment, content characteristics, and user settings. For example, in outdoor mode, the radius can be widened to emphasize a sense of distant space and reverberation, while in indoor mode, a narrow radius can be set to emphasize a sense of close space.

[0108] The sound source output unit (300) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to include a sound receiving unit (310) and a sound source output unit (320).

[0109] In the case of the sound receiving unit (310), the filtered three-dimensional sound is received through the sound source filtering unit (220).

[0110] The sound receiver (310) receives a stereoscopic sound signal, and the stereoscopic sound signal may correspond to a signal containing spatial processing results, such as HRTF application.

[0111] The sound source output unit (320) is configured to separate and output the three-dimensional sound to a speaker that is activated for three-dimensional sound.

[0112] In the case of the sound source output unit (320), output of the sound signal is performed, and three-dimensional sound is transmitted based on the activation status of each speaker and location information of the virtual audio station.

[0113] The sound source transmission unit (300) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to further include an output balance control unit (330).

[0114] In the case of the output balance control unit (330), the sum of the output volumes for the activated speakers can be made to be 1.

[0115] For example, if only the two front left and two right speakers are activated, it can be panned as L+R=1, and the sum of the speakers can be defined as 1 regardless of the increasing number of speakers.

[0116] The sound source processing unit (200) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to further include a position setting unit (230).

[0117] In the case of the position setting unit (230), the output position where three-dimensional sound is output is selectively set based on a virtual audio station that is virtually placed in a predetermined listening space based on the listener.

[0118] The position setting unit (230) determines which point among the multiple virtual audio stations the sound will be output based on.

[0119] The sound source processing unit (200) of the spatial position output control system of a sound source providing a multi-channel audio station listening space according to the present invention is configured to further include a sound mix unit (240).

[0120] The sound mix section (240) upmixes or downmixes the three-dimensional sound through coordinates for changes in the left and right ears according to the output position in the predetermined listening space.

[0121] The sound mix section (240) can perform upmixing or downmixing by citing the function value and filter value of the HRTF.

[0122] In the case of HRTF (head-related transfer function), it corresponds to a numerical representation of the changes in frequency characteristics caused by a person's head, ears, and shoulders when sound is heard from a specific direction.

[0123] HRTF may determine distance by comprehensively perceiving sound intensity, the delay time of initial reflections, the ratio of direct sound to reverberation, the speed of movement, and the degree of high-frequency attenuation.

[0124] In addition, in the case of the sound mix section (240), the sound wave transmission speed and the difference in the sound wave transmission speed and delay time equal to the length of the user's head diameter can be calculated according to the given information of the user's head diameter.

[0125] The user's head diameter can be set differently depending on differences in age, gender, or race, and statistical standards may be applied; however, here, it is set as a variable (function) for head diameter, and calculations such as time difference can be calculated differently depending on the input of a constant value for the head diameter variable, that is, the actual user's head diameter information.

[0126] In the case of head diameter, there are instances where a time difference may occur even with the same head diameter, as the information on the time difference calculated according to the head diameter may vary. This is because, in the case of sound transmitted across the two ears, namely the right and left ears, a time difference in sound wave transmission between the two ears may occur depending on the three-dimensionality of the user's face centered on the two ears, and this is calculated based on statistical information regarding the three-dimensional shape of the user's face.

[0127] The user's facial information is made possible through a user facial recognition unit (not shown), and this can introduce a function by linking with an app such as a smartphone equipped with a distance calculation unit from the system according to the present invention and a 3D recognition function for facial recognition.

[0128] In the case of an information file regarding the time difference of sound waves between the two ears based on the user's facial recognition unit and the user's 3D facial recognition, it can be divided into multiple sub-files. The files divided into sub-files are assigned the same mediating code and are stored separately on multiple physically divided DBs to prevent unauthorized hacking by a third party. Since a third party cannot re-merge the files without the information of the mediating code mediating the sub-files in the event of unauthorized hacking, it makes unauthorized hacking difficult.

[0129] The scope of rights of the present invention is determined by the matters described in the patent claims, and the parentheses used in the patent claims are not intended for optional limitation but for clear components, and the descriptions within the parentheses should also be interpreted as essential components.

Claims

1. A positioning unit that sets a predetermined listening space and forms virtual audio stations at a plurality of positions on the predetermined listening space; and A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a sound source processing unit that processes a sound source output from a speaker provided in a physical space into a three-dimensional sound at a relative volume ratio according to the position of the virtual audio station in the listening space.

2. In paragraph 1, the above system is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a sound source transmission unit that separates and transmits the signal of the three-dimensional sound processed by the sound source processing unit through the speaker.

3. In paragraph 2, the positioning unit is, A space setting unit for setting the above-mentioned predetermined listening space; and A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a station forming unit that sets each position on the above-mentioned predetermined listening space and assigns the virtual audio station to the above-mentioned position.

4. In paragraph 3, the sound source processing unit is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a distance calculation unit that receives a signal of the sound source output from an object outputting the sound source and calculates a physical distance.

5. In paragraph 3, the sound source processing unit is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a sound source filtering unit that filters the sound into three-dimensional sound for preset positions of a plurality of positions in the virtual audio station based on the physical distance calculated according to the distance calculation unit.

6. In paragraph 1, the above-mentioned predetermined listening space is, A spatial position output control system for a sound source that provides a multi-channel audio station listening space, characterized by setting a virtual spatial range in a 360-degree omnidirectional area based on the listener's position and allowing for selective expansion or contraction.

7. In paragraph 6, the above sound source transmission unit is, A sound receiver that receives the three-dimensional sound filtered through the sound source filtering unit; and A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a sound source transmission unit that separates and transmits the spatial sound to the speaker activated for the spatial sound.

8. In paragraph 7, the sound source transmission unit is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including an output balance control unit that makes the sum of the output volumes for the activated speakers equal to 1.

9. In paragraph 6, the sound source processing unit is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by further including a position setting unit that selectively sets an output position where the stereoscopic sound is output based on the virtual audio station virtually placed in the predetermined listening space based on the listener.

10. In paragraph 9, the sound source processing unit is, A spatial position output control system for a sound source providing a multi-channel audio station listening space, characterized by including a sound mixer that upmixes or downmixes the three-dimensional sound through coordinates for changes in reaching the left and right ears according to the output position on the aforementioned predetermined listening space.

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