JP2015167274A - Speaker arrangement presentation device, speaker arrangement presentation method, speaker arrangement presentation program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To present a speaker arrangement which allows for acoustic listening in a situation close to the production environment, both when a defined speaker arrangement is impossible, and when the center of speaker arrangement cannot be set at the listening position.SOLUTION: A speaker arrangement presentation device includes a storage unit for storing the speaker arrangement, the listening position, the listening environment, and a desired acoustic quality, a control unit for determining whether the amount of acoustic impression, based at least on the speaker arrangement and the listening position, conforms to the acoustic quality, and a display unit for displaying the speaker arrangement conforming to the acoustic quality. When the amount of acoustic impression does not conform to the acoustic quality, the control unit rearranges the speakers until the amount of acoustic impression, based on the speaker arrangement after rearrangement and the listening position, conforms to the acoustic quality, with the listening environment as the constraint conditions.

Description

  The present invention relates to a speaker arrangement presentation apparatus, method, and program, and more particularly, to a speaker arrangement presentation apparatus, method, and program compatible with a multi-channel audio system.

  A multi-channel sound system having a larger number of channels than two-channel stereophonic (Stereophonic) is known (see, for example, Patent Document 1). This multi-channel sound system includes various systems such as 5.1 channel, 7.1 channel, 9.2 channel, and 22.2 channel. In the multi-channel sound system, the reference speaker arrangement and the allowable range of the speaker arrangement position are usually stipulated by international standards. Furthermore, it is desirable to create and listen to the same playback environment as at the time of production. In addition, the multi-channel sound system is basically a symmetrical channel arrangement, and ideally the listening position is placed at the center of the speaker arrangement.

Japanese Patent Laid-Open No. 7-334176

  However, when trying to reproduce multi-channel sound at home or in various listening rooms, speakers cannot always be arranged as specified or in the same manner as in the production environment, resulting in restrictions on speaker arrangement. This tendency is considered to become more prominent as the number of channels increases. When the prescribed speaker arrangement cannot be realized, the listener installs the speaker in the environment in which the listener is placed. However, it is important to perform the speaker arrangement that retains the acoustic impression at the time of production as much as possible. Further, even if the speaker arrangement can be arranged as prescribed, there may be a case where the listening position cannot be placed at the center of the speaker arrangement due to the constraints of the listening environment.

  Accordingly, an object of the present invention made in view of such points is to present a speaker arrangement that can be listened to in a situation close to the production environment even if the specified speaker arrangement cannot be performed and the center of the speaker arrangement cannot be set to the listening position. There is to do.

  In order to solve the above-described problems, a speaker arrangement presentation device according to the present invention is based on a speaker arrangement, a listening position, a listening environment, a storage unit that stores desired acoustic quality, and at least the speaker arrangement and the listening position. A control unit that determines whether or not the acoustic impression amount matches the acoustic quality; and a display unit that presents a speaker arrangement that conforms to the acoustic quality, and the control unit sets the acoustic impression amount to the acoustic quality. If not, the listening environment is set as a constraint, and the speaker is rearranged until the speaker arrangement after the rearrangement and the acoustic impression amount based on the listening position match the acoustic quality.

  In addition, it is preferable that the control unit calculates a first acoustic impression amount based on the speaker arrangement and the listening position and a second acoustic impression amount based on the listening environment as the acoustic impression amount.

  Moreover, it is preferable that the said control part rearranges the said speaker so that the maximum value of the prospective angle of an adjacent speaker may be lowered | hung.

  Moreover, it is preferable that the said control part rearranges the said speaker so that the left-right asymmetry of a speaker may be eliminated.

  Moreover, it is preferable that the said control part rearranges the said speaker so that a speaker may be arrange | positioned to the side of the said listening position.

  As described above, the solution of the present invention has been described as an apparatus. However, the present invention can be realized as a method, a program, and a storage medium storing the program, which are substantially equivalent thereto, and the scope of the present invention. It should be understood that these are also included.

  For example, in order to solve the above-described problems, a speaker arrangement presentation method according to the present invention stores a speaker arrangement, a listening position, a listening environment, and a desired acoustic quality, and presents a speaker arrangement that matches the acoustic quality. A speaker arrangement presentation method by a speaker arrangement presentation device, wherein the processing procedure by the speaker arrangement presentation device determines whether an acoustic impression amount based on at least the speaker arrangement and the listening position matches the acoustic quality; If the acoustic impression amount does not match the acoustic quality, the listening environment is a constraint, and the speakers are rearranged until the rearranged speaker arrangement and the acoustic impression amount based on the listening position match the acoustic quality. And a step.

  In order to solve the above-described problems, the speaker arrangement presentation program according to the present invention stores the speaker arrangement, the listening position, the listening environment, and the desired acoustic quality, and presents the speaker arrangement suitable for the acoustic quality. In the speaker arrangement presentation device, determining whether an acoustic impression amount based on at least the speaker arrangement and the listening position is compatible with the acoustic quality; and if the acoustic impression amount is not compatible with the acoustic quality, the listening environment is And a step of rearranging the speakers until the amount of sound impression based on the rearranged speaker arrangement and the listening position matches the acoustic quality as a constraint condition.

  According to the present invention, it is possible to present a loudspeaker arrangement that allows acoustic listening in a situation close to the production environment even when the prescribed loudspeaker arrangement cannot be performed and when the center of the loudspeaker arrangement cannot be set to the listening position.

It is a figure which shows the structure of the speaker arrangement | positioning presentation apparatus which concerns on one Embodiment of this invention. It is a flowchart which shows the process of a speaker arrangement | positioning presentation apparatus. It is a figure which shows an example of initial conditions (text data). It is a figure which shows an example of initial conditions (drawing data). It is a figure which shows the relationship between the listening position which concerns on acoustic impression amount calculation, and speaker arrangement | positioning. It is a figure which shows an example of speaker arrangement | positioning presentation.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a diagram showing a configuration of a speaker arrangement presentation device according to an embodiment of the present invention. The speaker arrangement presentation device 1 includes a control unit 10 including an acoustic impression amount calculation unit 11, a speaker arrangement evaluation unit 12, a speaker rearrangement unit 13, and a speaker arrangement presentation unit 14, an initial condition storage unit 21, and a requested psychoacoustic amount. A storage unit 20 including a database 22 is connected to the display unit 30 and the operation unit 40.

  Each processing unit 11 to 14 of the control unit 10 is configured by a suitable processor, and each processing unit 11 to 14 can be mounted as a common processor or can be mounted as an individual processor. The storage unit 20 is a suitable storage device, and may be an external storage device via a communication interface as well as a built-in speaker arrangement presentation device 1. The display unit 30 is a suitable display such as a liquid crystal display, and presents a speaker arrangement suitable for a desired acoustic quality, as will be described later. The operation unit 40 is a suitable operation interface such as a touch panel type remote controller, and accepts input of initial conditions related to speaker arrangement from the user.

  Hereinafter, each functional unit of the speaker arrangement presentation device 1 will be described along a flowchart. FIG. 2 is a flowchart showing processing of the speaker arrangement presentation device 1. The speaker arrangement presentation device 1 receives an initial condition input from the user via the operation unit 40, and stores the input initial condition in the initial condition storage unit 21 (step S101). Initial conditions include target speaker configuration (number of individual speakers, placement), listening environment (room size, shape, application, interior, furniture / furniture placement, etc.), user listening position, desired sound Quality (required psychoacoustic quantity: reproduction quality desired by the user such as ultra-high sound quality, high quality, and medium quality). FIG. 3 is a diagram illustrating an example of initial conditions input as text data. In FIG. 3, the user sets “speaker number: 10” as the speaker configuration, “size: 8 tatami mats, usage: living room, interior: flooring, shape: rectangular parallelepiped”, and “required psychoacoustic quantity” as desired acoustic quality. : “High sound quality” is entered. FIG. 4 is a diagram illustrating an example of initial conditions input as drawing data. FIG. 4 (a) is a plan view of the listening environment. The user's listening position P and 10 individual items are placed in an 8 tatami room where two pieces of furniture, Item 1 (for example, a TV board) and Item 2 (for example, a basket) are arranged. The arrangement of the speakers SP1 to 10 is shown. FIG. 4B is a cross-sectional view of FIG. 4A viewed from the right direction, and illustrates the arrangement in the height direction of the listening position P and the individual speakers SP1 to SP10. The screen information shown in FIG. 3 and FIG. 4 is displayed on the display unit 30, and the user can input initial conditions through the operation unit 40 while checking the screen of the display unit 30. In addition, when the display unit 30 is a liquid crystal display and the operation unit 40 is a touch panel, the operation unit 40 is preferably arranged on the front surface of the display unit 30 for intuitive operation.

  The acoustic impression amount calculation unit 11 calculates the acoustic impression amount based on the initial conditions (step S102). Here, the sound impression amount is a value representing sound quality, and in particular, the sound impression amount calculation unit 11 calculates an envelopment feeling that is one of spatial impressions among the sound impressions. The acoustic impression amount can be calculated from an acoustic impression evaluation function derived from a result of a subjective evaluation experiment or a perceptual experiment based on a combination of initial conditions (discussed separately from the present apparatus). In the present embodiment, the acoustic impression amount calculation unit 11 uses a first acoustic impression amount based on the speaker arrangement and the listening position and a second acoustic impression amount based on the listening environment as the enveloped feeling that is the acoustic impression amount. calculate.

(First acoustic impression amount)
The first acoustic impression amount is an acoustic impression amount based on the speaker arrangement and the listening position. When the listening position of the user changes, the positional relationship with the speaker also changes. Factors affecting the feeling of being wrapped are the distance between adjacent speakers (azimuth angle) from the listening position, the presence or absence of speakers in both ears (side speakers), and the left-right asymmetry of the sound pressure balance. For this reason, the sound impression amount calculation unit 11 calculates the first sound impression amount based on the equation (1).

  Here, as shown in FIG. 5, r and θ in Equation (1) indicate the relative position of the listening position P with respect to the ideal listening position. The ideal listening position is a listening position defined by, for example, a multi-channel acoustic system, and is a position that is the center of speaker arrangement. Note that the ideal listening position may be designated by the user when the initial conditions in FIG. 4 are input, for example, or may be automatically calculated by the acoustic impression amount calculation unit 11 from the arrangement of the individual speakers SP1 to SP10. Similarly, the relative position (r, θ) of the listening position P with respect to the ideal listening position can be automatically calculated by the acoustic impression amount calculation unit 11 based on the initial conditions. The coefficient ω representing the left-right asymmetry can be set so that, for example, the reference value (for example, 1) is set when the speaker arrangement is left-right symmetric, and the reference value increases as the left-right asymmetry increases. The coefficient k indicating the presence or absence of the side speaker is such that the value is large when the speaker is near the side of the listening position (both ears of the listener), and is small when there is no speaker near the side. Can be set.

(Second acoustic impression amount)
The second acoustic impression amount is an acoustic impression amount based on the listening environment. Depending on the characteristics of the listening environment (room size, shape, application, interior, furniture / furniture arrangement, etc.), the room reverberation time and the amount of reverberation by direction that affect the feeling of wrapping will vary. For this reason, the sound impression amount calculation unit 11 calculates the second sound impression amount based on the equation (2).

RT（t）：残響時間
EN（p）:方向別残響量

RT (t): Reverberation time
EN (p): Reverberation by direction

  Here, for calculating the reverberation time and the reverberation amount for each direction, a known technique is used, and details are not described in this paper. In general, the longer the reverberation time, the better the feeling of envelopment, and the greater the reflected sound component (reverberation energy) in a specific direction, the better the envelopment feeling. It should be noted that data such as reflectance based on the usage of the room, the interior, the type of furniture fixture, and the like necessary for calculating the reverberation time and reverberation energy by direction are stored in the storage unit 20.

  The acoustic impression amount calculation unit 11 outputs the sum of the first acoustic impression amount and the second acoustic impression amount as the acoustic impression amount to the speaker arrangement evaluation unit 12 as expressed by the equation (3). The sound impression amount calculation unit 11 may output either the first sound impression amount or the second sound impression amount as the sound impression amount to the speaker arrangement evaluation unit 12.

  The speaker arrangement evaluation unit 12 compares the acoustic impression amount calculated by the acoustic impression amount calculation unit 11 with the user's requested psychoacoustic amount (acoustic quality), which is an initial condition, and the acoustic impression amount matches the requested acoustic psychological amount. It is determined whether or not to perform (step S103). The required psychoacoustic quantity database 22 stores thresholds corresponding to classifications such as super high sound quality, high quality, and medium quality that are required acoustic psychological quantities. The speaker arrangement evaluation unit 12 acquires a threshold value corresponding to the requested psychoacoustic amount desired by the user from the requested psychological amount database 22, and compares the acquired threshold value with the acoustic impression amount calculated by the acoustic impression amount calculation unit 11. By doing so, the conformity determination can be performed. It should be noted that threshold values corresponding to classifications such as the required psychoacoustic quantity, such as ultra-high sound quality, high quality, and medium quality, can be appropriately set by those skilled in the art. Can do.

  When the speaker arrangement evaluation unit 12 determines that the acoustic impression amount does not match the requested psychoacoustic amount (No in step S103), the speaker rearrangement unit 13 uses the listening environment as an initial condition as a constraint condition as a speaker (individual speaker). ) Are rearranged (step S104). When the speaker rearrangement unit 13 rearranges the speakers, the process returns to step S102. The speaker rearrangement unit 13 rearranges the speakers until the acoustic impression amount based on the rearranged speaker arrangement and the listening position matches the required psychoacoustic amount. Here, the speaker rearrangement unit 13 can perform the speaker rearrangement so as to improve the first sound impression amount affected by the speaker arrangement. For example, the speaker rearrangement unit 13 can rearrange the speakers so that the individual speaker having the maximum expected angle in Expression (1) is the target of rearrangement and lowers the maximum expected angle. In addition, the speaker rearrangement unit 13 can perform speaker rearrangement so as to eliminate the left-right asymmetry of the speaker in order to improve the left-right asymmetry coefficient in Equation (1). Moreover, the speaker rearrangement unit 13 can perform the speaker rearrangement so that the speaker is arranged to the side of the listening position in order to improve the coefficient indicating the presence or absence of the side speaker in the equation (1).

  When the speaker arrangement evaluation unit 12 determines that the acoustic impression amount matches the required psychoacoustic amount (Yes in step S103), the speaker arrangement presentation unit 14 causes the display unit 30 to display a speaker arrangement that matches the required acoustic psychological amount. (Step S105). FIG. 6 is a diagram illustrating an example of speaker arrangement presentation. FIG. 6A is a plan view showing the rearrangement, and the positions of the individual speakers before the rearrangement are indicated by dotted lines, and the positions of the individual speakers SP1 to 10 after the rearrangement are indicated by solid lines. FIG. 6B is a cross-sectional view of FIG. 6A viewed from the right direction, and illustrates the arrangement in the height direction of the individual speakers SP1 to SP10 after rearrangement. In FIG. 6B, for the sake of simplicity, the illustration of the individual speakers before the rearrangement is omitted, but it can be displayed by, for example, a dotted line as in FIG. 6A.

  As described above, according to the present embodiment, the speaker arrangement presentation device 1 uses the listening environment as a constraint when the acoustic impression amount does not match the desired acoustic quality, and the sound based on the speaker arrangement and the listening position after the rearrangement. Rearrange the speakers until the impression amount matches the sound quality. As a result, it is possible to present a loudspeaker arrangement that allows acoustic listening in a situation close to the production environment even when the prescribed loudspeaker arrangement cannot be performed and when the center of the loudspeaker arrangement cannot be set as the listening position. That is, even when the speaker arrangement is restricted, it is possible to prevent deterioration of the sound impression of the content. In addition, by objectively evaluating the spatial impression of the speakers arranged under the constraint conditions depending on the listening environment, it is possible to present the optimum speaker arrangement for the user.

  Further, the speaker arrangement presentation device 1 can calculate the first acoustic impression amount based on the speaker arrangement and the listening position and the second acoustic impression amount based on the listening environment as the acoustic impression amount. This makes it possible to use calculation formulas that function the relationship between speaker placement, listening position, and listening environment obtained in advance through subjective evaluation experiments, acoustic perception experiments, etc., and present speaker placement that is more suitable for the environment. It becomes possible to do. In addition, since functions related to the calculation of acoustic impressions are considered to have individual functions for various acoustic impressions, a new function has been devised by clarifying the relationship between the subjective evaluation value of an acoustic impression and the initial conditions. It is also possible to add functions as appropriate later.

  Moreover, the speaker arrangement presentation device 1 can perform the rearrangement of the speakers so as to lower the maximum value of the prospective angles of adjacent speakers. As a result, it is possible to present a speaker arrangement that improves the feeling of envelopment, which is the amount of acoustic impression.

  Further, the speaker arrangement presentation device 1 can rearrange the speakers so as to eliminate the left-right asymmetry of the speakers. As a result, it is possible to present a speaker arrangement that improves the feeling of envelopment, which is the amount of acoustic impression.

  Moreover, the speaker arrangement presentation device 1 can rearrange the speakers so that the speakers are arranged on the side of the listening position. As a result, it is possible to present a speaker arrangement that improves the feeling of envelopment, which is the amount of acoustic impression.

  Although the present invention has been described based on the drawings and examples, it should be noted that those skilled in the art can easily make various modifications and corrections based on the present disclosure. Therefore, it should be noted that these variations and modifications are included in the scope of the present invention. For example, the functions included in each component, each step, etc. can be rearranged so that there is no logical contradiction, and multiple components, steps, etc. can be combined or divided into one It is.

  For example, since the relative distance between the listening position and each speaker is different, the acoustic impression amount calculation unit 11 can calculate the acoustic impression amount using a coefficient for adjusting the sound pressure level of each individual speaker. When the speaker arrangement suitable for the desired psychoacoustic requirement is obtained by adjusting the sound pressure level of each individual speaker, the speaker arrangement presentation device 1 adds the sound pressure of each individual speaker to the display unit 30 in addition to the speaker arrangement. It is preferable to display the level.

  Further, the speaker arrangement presentation device 1 defines the number of times of determination of conformity between the acoustic impression amount and the requested psychological amount, and if there is no suitable speaker arrangement even after a certain number of determinations, the suitable speaker arrangement is It is assumed that there is no speaker arrangement, and the speaker arrangement that provides the optimum sound impression amount at that time can be presented on the display unit 30. Accordingly, it is possible to reduce the amount of calculation related to the speaker arrangement and present an optimum speaker arrangement under the constraint condition.

DESCRIPTION OF SYMBOLS 1 Speaker arrangement | positioning presentation apparatus 10 Control part 11 Sound impression amount calculation part 12 Speaker arrangement | positioning evaluation part 13 Speaker rearrangement part 14 Speaker arrangement | positioning presentation part 20 Storage part 21 Initial condition memory | storage part 22 Request | requirement psychoacoustic quantity database 30 Display part 40 Operation part P Listening position SP1-10 Individual speaker

Claims (7)

A storage unit for storing speaker arrangement, listening position, listening environment, and desired sound quality;
A control unit for determining whether an acoustic impression amount based on at least the speaker arrangement and the listening position is compatible with the acoustic quality;
A display unit for presenting a speaker arrangement suitable for the acoustic quality,
When the acoustic impression amount does not match the acoustic quality, the control unit uses the listening environment as a constraint condition, and the speaker arrangement after the rearrangement and the acoustic impression amount based on the listening position match the acoustic quality. A speaker arrangement presentation device that performs rearrangement.   The said control part calculates the 1st acoustic impression amount based on the said speaker arrangement | positioning and the said listening position, and the 2nd acoustic impression amount based on the said listening environment as the said acoustic impression amount. Speaker arrangement presentation device.   The speaker arrangement presentation device according to claim 1, wherein the control unit rearranges the speakers so as to reduce a maximum value of a prospective angle of adjacent speakers.   The speaker arrangement presentation device according to any one of claims 1 to 3, wherein the control unit rearranges the speakers so as to eliminate left-right asymmetry of the speakers.   The speaker arrangement presentation device according to any one of claims 1 to 4, wherein the control unit rearranges the speakers so that the speakers are arranged on a side of the listening position. A speaker arrangement presentation method by a speaker arrangement presentation device for storing speaker arrangement, listening position, listening environment, and desired acoustic quality and presenting a speaker arrangement suitable for the acoustic quality, the processing procedure by the speaker arrangement presentation device But,
Determining whether an acoustic impression amount based on at least the speaker arrangement and the listening position matches the acoustic quality;
If the acoustic impression amount does not match the acoustic quality, the listening environment is a constraint, and the speakers are rearranged until the rearranged speaker arrangement and the acoustic impression amount based on the listening position match the acoustic quality. A speaker arrangement presentation method comprising the steps of: A speaker arrangement presentation device that stores speaker arrangement, listening position, listening environment, and desired acoustic quality, and presents a speaker arrangement that matches the acoustic quality.
Determining whether an acoustic impression amount based on at least the speaker arrangement and the listening position matches the acoustic quality;
If the acoustic impression amount does not match the acoustic quality, the listening environment is a constraint, and the speakers are rearranged until the rearranged speaker arrangement and the acoustic impression amount based on the listening position match the acoustic quality. And a speaker arrangement presentation program for executing the steps.

Images