WO2015029874A1

WO2015029874A1 - Speaker device, audio reproduction system, and program

Info

Publication number: WO2015029874A1
Application number: PCT/JP2014/071895
Authority: WO
Inventors: 松沼　康宏; 鈴木　英之
Original assignee: ヤマハ株式会社
Priority date: 2013-08-28
Filing date: 2014-08-21
Publication date: 2015-03-05
Also published as: JP2015046728A; EP3041273A1; JP6090066B2; EP3041273A4; CN105532021A; EP3041273B1

Abstract

The present invention addresses the problem of providing an audio reproduction system capable of adjusting the timings of arrival of a sound emitted from a back surface and a sound emitted from a front surface at a user. An audio reproduction system comprises a speaker device (1) and a remote control device. The speaker device (1) is provided with a first speaker unit (210) provided in the back surface of a housing (11), a second speaker unit (211C) provided in the upper surface or the front surface of the housing (11), and a delay unit (231C) which delays a sound emitted from the second speaker unit (211C). The remote control device accepts inputs of an installation mode of the speaker device (1) and a back surface distance to a wall (80), calculates the delay time of the delay unit (211C) on the basis of the inputted installation mode and back surface distance , and transmits the delay time to the speaker device (1). The speaker device (1) sets the delay time received from the remote control device in the delay unit (211C).

Description

Speaker device, audio playback system, and program

The present invention relates to adjustment of the timing at which sound emitted from a plurality of speaker units reaches a user.

In Patent Document 1, sound output timing (delay time) of each speaker unit corresponds to a plurality of installation forms such as a corner installation in which the corner of the room is installed in the back and a wall installation in which the room wall is installed in the back. There has been proposed a speaker unit capable of controlling.

Japanese Unexamined Patent Publication No. 2006-340302

Although the thing of patent document 1 performs setting of corner installation (corner placement) and wall installation (wall placement), the delay time of each speaker unit is performed by measurement, and a separate microphone for measurement, a measurement circuit, and the like are provided. It was necessary. Further, in order to make the speaker device a novel design, it may be possible to provide some speaker units on the back side. However, in Patent Document 1, all speaker units are arranged facing forward. Therefore, it has not been considered to control the sound emission timing of the speaker unit installed toward the back surface and the speaker unit installed toward the upper surface or the front surface.

Therefore, an object of the present invention is to provide a speaker device, an audio reproduction system, and a program that can adjust the arrival timing of the sound emitted from the back surface and the sound emitted from the front surface or the top surface to the user.

A speaker device according to an aspect of the present invention includes a housing having openings on the back surface and the top surface or the front surface, a first speaker unit provided on the opening portion on the back surface, and a second provided on the opening portion on the top surface or the front surface. Accepts an input of a back distance, which is a distance between the speaker unit, a delay unit that delays sound emitted from the second speaker unit, an installation form that indicates the arrangement of the housing relative to the wall in the back direction of the housing, and the wall. Operation receiving means, calculation means for calculating the delay time of the delay unit based on the installation form and back distance input from the operation reception means, and setting means for setting the delay time calculated by the calculation means in the delay unit It is provided with.

An audio reproduction system according to an embodiment of the present invention includes a speaker device and a remote control device. The speaker device includes a housing having an opening on the back surface and the top surface or the front surface, a first speaker unit provided on the opening on the back surface, and a second speaker unit provided on the opening on the top surface or the front surface, A delay unit that delays sound emitted from the second speaker unit; and a communication unit that communicates with the remote control device. The remote control device displays a communication unit that communicates with the speaker device, an operation screen that accepts an input of a back distance, which is a distance from the wall and an installation form indicating the arrangement of the housing with respect to a wall in the back direction of the housing, and the user Operation receiving means for receiving the operation, and transmission means for transmitting the installation form and the back distance input from the operation receiving means to the speaker device. The speaker device further includes calculation means for calculating the delay time of the delay unit based on the installation form and back distance received from the remote control device, and setting means for setting the delay time calculated by the calculation means in the delay unit; Is provided.

An audio reproduction system according to an embodiment of the present invention includes a speaker device and a remote control device. The speaker device includes a housing having an opening on the back surface and the top surface or the front surface, a first speaker unit provided on the opening on the back surface, and a second speaker unit provided on the opening on the top surface or the front surface, A delay unit that delays sound emitted from the second speaker unit; and a communication unit that communicates with the remote control device. The remote control device displays a communication unit that communicates with the speaker device, an operation screen that accepts an input of a back distance, which is a distance from the wall and an installation form indicating the arrangement of the housing with respect to a wall in the back direction of the housing, and the user An operation receiving means for receiving the operation, a calculating means for calculating the delay time of the delay unit based on the installation form and the rear distance input from the operation receiving means, and transmitting the delay time calculated by the calculating means to the speaker device Transmitting means. The speaker device further includes setting means for setting the delay time received from the remote control device in the delay unit.

The speaker device extracts a mid-range component signal including a human voice from an audible frequency band of the input audio signal, and supplies the mid-range component signal including the human voice to the second speaker unit, a low-frequency component signal other than the mid-range component signal, and A low range filter and a high range filter that take out a high range component signal and supply it to the first speaker unit; and an equalizer that independently controls the gains of the output signals of the low range filter, the mid range filter, and the high range filter. Further, it may be provided.

In this case, as the second speaker unit, a mid-range loudspeaker in which the sound emission characteristic of the low-frequency range is suppressed may be used, and the mid-range filter may be a low-pass filter that extracts signal components below the mid-range including low-frequency components.

The remote control device displays an operation screen for accepting an input of the wall type and accepts a user operation, and corrects the gain of the equalizer according to the type of wall input by the second operation accepting unit. Gain correction means and second transmission means for transmitting the corrected gain to the speaker device may be further provided, and the speaker device may set the gain received from the remote control device to the equalizer.

The operation screen of the remote control device displays a plurality of installation forms respectively indicating different arrangements of the casing with respect to the wall in the rear direction of the casing, and the operation accepting means is one installation form from the plurality of installation forms. You may make it accept the operation of the user who selects.

According to one aspect of the present invention, a program for a mobile phone computer capable of communicating with a speaker device is installed in a rear surface distance that is a distance from the wall and an installation configuration that indicates an arrangement of the housing with respect to a wall in a rear direction of the housing of the speaker device. An operation screen for accepting input is displayed, and an operation accepting unit that accepts a user's operation and a transmission unit that transmits the installation form and the rear distance input from the operation accepting unit to the speaker device are caused to function.

According to one aspect of the present invention, a program for a mobile phone computer capable of communicating with a speaker device is installed in a rear surface distance that is a distance from the wall and an installation configuration that indicates an arrangement of the housing with respect to a wall in a rear direction of the housing of the speaker device. Operation accepting means for accepting user operation by displaying an operation screen for accepting input, calculating means for calculating the delay time of the delay unit of the speaker device based on the installation form and back distance input from the operation accepting means, and calculation The delay time calculated by the means is made to function as a transmission means for transmitting to the speaker device.

According to one aspect of the present invention, a program for a mobile phone computer capable of communicating with a speaker device is installed in a rear surface distance that is a distance from the wall and an installation configuration that indicates an arrangement of the housing with respect to a wall in a rear direction of the housing of the speaker device. By an operation receiving means for displaying an operation screen for receiving an input and receiving a user operation, a calculating means for calculating a delay time of the delay unit of the speaker device based on an installation form and a rear distance input from the operation receiving means, and a calculating means Transmitting means for transmitting the calculated delay time to the speaker device, second operation accepting means for displaying an operation screen for accepting input of the wall type and accepting user operation, and wall type input by the second operation accepting means And a gain correcting means for correcting the gain of the equalizer of the speaker device according to the Second transmitting means for, to function as a.

According to the present invention, the user can set the delay time of the second speaker unit only by inputting the installation form and the rear distance of the speaker device to the remote control device.

External view of speaker apparatus according to an embodiment of the present invention The perspective view of the headpiece provided in the upper end of a speaker apparatus The figure which shows the example of the installation form of a speaker apparatus Block diagram of electronic circuit of speaker device Block diagram of signal processing unit and speaker driving unit of speaker device The figure which shows the characteristic of the filter provided in the speaker apparatus The figure explaining the calculation method of the delay time of the sound emitted from the speaker unit provided in the back direction Block diagram of a cellular phone that functions as a remote control device for a speaker device Functional block diagram of a remote control device (DTA controller) configured by cooperation of a mobile phone and an application program The figure explaining the tree structure of the display screen of a remote control device Diagram showing option screen and equalizer screen Figure showing sound environment setting screen Figure showing the wall selection screen Diagram showing gain correction table

A speaker device according to an embodiment of the present invention will be described with reference to the drawings. 1A and 1B are external views of the speaker device 1. FIG. 1A is a front view, FIG. 1B is a right side view, and FIG. 1C is a rear view.

The speaker device 1 includes a housing 11 in which a plurality of speakers are accommodated, a disk-shaped base 14 that supports the housing 11 from the floor surface, and a rod-shaped pillow 13 that connects the housing 11 and the base 14. ing. The casing 11 is supported by the pillow 13 and the base 14 and is erected in the vertical direction.

The housing 11 has a substantially quadrangular prism shape and is slightly narrower in the upward direction. In other words, it is a quadrangular pyramid shape (a shape obtained by cutting the apex side (head) of the quadrangular pyramid horizontally with a plane parallel to the bottom surface). The side surface of the housing 11 is inclined by 2 percent with respect to the vertical line. The speaker device 1 is installed with the ridge line portion 19 sandwiched between the two side surfaces facing the front (user direction). In the following description, the front direction is referred to as the front, and the back direction is referred to as the rear. Moreover, the direction when the speaker apparatus 1 is seen from the user of the front direction is used for the left and right directions.

In this speaker device 1, as shown in FIGS. 1B and 1C, speaker units 210 L and 210 R are provided rearward, and a speaker grill 12 is provided on the back side of the housing 11. Thereby, it is not necessary to provide the speaker grill 12 on the front side of the speaker device 1.

The inside of the housing 11 is partitioned by two partition plates, and has a structure having three spaces in the vertical direction. The upper space is used as a mid-range speaker box 30 that houses the speaker unit 211C, the middle space is used as the stereo speaker box 31 that houses the

speaker units

210L and 210R, and the lower space is used as the circuit box 32 that houses the electronic circuit 15. It is done.

Further, the mid-range speaker box 30 has an opening on the upper surface, and the speaker unit 211C is attached upward in this opening. Above the speaker unit 211C, a headpiece 10 that reflects sound emitted from the speaker unit 211C forward is provided.

Speaker units

210L and 210R are full-range speaker units for left and right channels that are responsible for low-frequency and high-frequency sound emission. The speaker unit 211C is a mid-range speaker unit common to the left and right channels that is responsible for sound emission in the middle range. Here, the mid range is a frequency band that mainly covers a human voice, for example, a range of 100 Hz to 7000 Hz. The mid range is not limited to this. For example, it may be 300 to 3400 Hz, which is a band used for a telephone line. The high sound range is a frequency band higher than the mid sound range, and the low sound range is a frequency band lower than the mid sound range. Hereinafter, the lower limit frequency of the mid range is referred to as FL, and the upper limit frequency of the mid range is referred to as FH.

FIG. 2 is a perspective view of the head piece. The headpiece 10 includes an upper main body portion 101 having a sound emission port 110, a top plate 102 disposed on the upper surface of the main body portion 101, and a lower skirt 106. The main body 101 has a substantially cubic shape. The bottom plate 103 of the headpiece 10 has a circular opening 103A at the center. The diameter of the opening 103A is substantially the same as the diameter of the speaker unit 211C.

On the inner side of the main body 101, the lower apex 105 C between the two

side surfaces

113 and 114, which are the back plate 104, and the two

side surfaces

111 and 112, which are the sound emission ports 110 (notched). Reflector 105 (105A, 105B) which is a surface of two triangles connecting the upper side is formed. Since the main body 101 is substantially cubic, the left and

right surfaces

105A and 105B of the reflector 105 are at an angle of about 45 degrees with respect to a horizontal plane such as the bottom plate 103, respectively.

The sound emitting surface of the speaker unit 211C is installed below the headpiece 10 and directly above the same central axis. Further, the surface of the reflector 105 of the headpiece 10 is disposed to face the sound emitting surface of the speaker unit 211C, and the inclination angle is about 45 degrees. Therefore, the sound emitted upward from the speaker unit 211C is reflected by the reflector 105 as indicated by the arrow 130 shown in FIG. Thereby, even if sound is emitted upward from the speaker unit 211C, it is reflected by the reflector 105 and can propagate from the front side of the side surface of the housing 11 to the front left and right direction with little loss.

FIG. 3 is a diagram illustrating an example of an installation form of the speaker device 1. FIG. 3A is a diagram showing an example in which the speaker device 1 is installed with a corner (corner) 81 of the room as a back. In this installation mode, the left and right walls 80 L and 80 R of the corner 81 are positioned behind the speaker device 1 as reflecting surfaces at an angle of about 45 degrees from the front-rear direction of the speaker device 1. FIG. 3B is a diagram showing an example in which the speaker device 1 is installed with the wall 80 as the back. In this installation mode, the wall 80 is positioned behind the speaker device 1 as a reflecting surface at an angle of about 90 degrees with the front-rear direction of the speaker device 1.

When the audio signal is input to the speaker device 1, the left and right channel sounds are emitted from the

speaker units

210L and 210R, respectively. Since the speaker units 210L and R are provided in the rear direction (facing the wall), when the speaker device 1 is installed as shown in FIG. 3, the sound of the left and right channels emitted from the speaker units 210L and R is It is reflected by the wall 80 (L, R) in the back direction and propagates forward (in the room direction). For this reason, the sound emitted from the

speaker units

210L and 210R is emitted from the speaker unit 211C on the upper surface, and is delayed by a time propagating the distance reflected by the wall 80, compared to the sound propagating directly forward. Therefore, the signal processing unit 201 (see FIG. 5) of the speaker device 1 delays the audio signal input to the speaker unit 211C by a time corresponding to the distance reflected by the wall 80, so that the speaker units 210L, R, and The timing at which the sound emitted by the speaker unit 211C reaches the user is matched.

Further, when the speaker device 1 is installed as shown in FIG. 3, the sound of the left and right channels emitted from the

speaker units

210L and 210R is reflected by the wall 80 (L, R) in the rear direction and forward (indoors) Direction). Among the sounds emitted from the

speaker units

210L and 210R, the high-frequency sound is highly straight and reflects well on the wall, contributing to giving the listener a stereo sense. Further, since the sound in the low frequency range is not strongly localized, the user (listener) feels no sense of incongruity even if the sound is heard as if it is ringing near the wall surface. On the other hand, the mid-range sound is a sound range including a person's speaking voice and singing voice. When reflected on the wall surface, the sound is greatly attenuated and becomes so-called “hidden” and lowers the clarity of the sound. Therefore, the speaker device 1 extracts a mid-range component from the left and right channel sounds, and emits the mid-range component sound from the upward speaker unit 211C. Although the speaker unit 211C is facing upward, the mid-range sound emitted by the headpiece 10 provided on the speaker unit 211 propagates forward in a favorable manner. Thereby, it becomes possible to make a user hear the sound from a low sound range to a high sound range clearly without a sense of incongruity.

The electronic circuit 15 is built in the circuit box 32 of the housing 11. FIG. 4 is a block diagram of the main part of the electronic circuit 15. FIG. 5 is a detailed block diagram of the signal processing unit 201 and the speaker driving unit 202 of the electronic circuit 15. 4, the electronic circuit 15 includes a control unit 50, a signal processing unit 201, a speaker driving unit 202, an input selection unit 53, a Bluetooth (registered trademark) communication circuit 54, a cable connector 55, and the like.

The control unit 50 is composed of a microcomputer. A Bluetooth communication circuit 54 is connected to the control unit 50. The Bluetooth communication circuit 54 inputs a command received from a device such as a multi-function mobile phone (smart phone) having a controller function to the control unit 50. Based on the command input from the Bluetooth communication circuit 54, the control unit 50 performs setting of the signal processing unit 201, selection of a signal input by the input selection unit 53, and the like. A Bluetooth communication circuit 54 and a cable connector 55 are connected to the input selection unit 53. The input selection unit 53 selects either the Bluetooth communication circuit 54 or the cable connector 55 based on the selection signal input from the control unit 50, and inputs the audio signal input therefrom to the signal processing unit 201.

The signal processing unit 201 adjusts the sound quality of the (2-channel stereo) audio signal input from the input selection unit 53, extracts the mid-range components from the left and right channel signals, synthesizes them, and generates the third channel ( (Center channel) audio signal. In addition, the signal processing unit 201 delays the center channel audio signal, thereby matching the arrival times of the sounds emitted from the speaker units 210L, R, and 211C to the user. In FIG. 5, the speaker driving unit 202 includes three-

channel amplifiers

226L and 226L and an amplifier 229, which amplify the left channel, right channel, and mid-range audio signals, respectively. R and output to the speaker unit 211C. Details of the signal processing unit 201 and the speaker driving unit 202 will be described with reference to FIG.

FIG. 5 is a block diagram of the signal processing unit 201 and the speaker driving unit 202 of the speaker device 1. In this block diagram, the signal processing unit 201 includes low-

pass filters

220L, 220R, 227L, and 227R, high-

pass filters

221L and 221R,

gain adjustment units

223L, 223R, 224L, 224R, 228L, and 228R,

adders

225L, 225R, and 230C, And it has a delay unit 231C. Further, the speaker driving unit 202 includes

amplifiers

226L, 226R, and 229C.

Left channel audio signal input section 212L inputs the left channel audio signal and supplies it to low pass filters 220L and 227L and high pass filter 221L. The low-pass filter 220L is a filter that passes a signal having a frequency lower than the lower limit frequency FL in the middle sound range. FIG. 6B shows the frequency characteristics of the low-pass filter 220L. The curve LPF on the left is the characteristic of the low pass filter 220L. The low-frequency audio signal that has passed through the low-pass filter 220L is input to the adder 225L after the gain is adjusted by the gain adjusting unit 223L. The high-pass filter 221L is a filter that passes a signal having a frequency equal to or higher than the upper limit frequency FH in the middle range. FIG. 6B shows frequency characteristics of the high-pass filter 221L. The right curve HPF is the characteristic of the high-pass filter 221L. The high-frequency audio signal that has passed through the high-pass filter 221L is input to the adder 225L after the gain is adjusted by the gain adjusting unit 224L. The adder 225L adds and synthesizes the audio signal of the low sound range and high sound range of the left channel. The added and synthesized audio signal is amplified by the amplifier 226L and supplied to the speaker unit 210L. The

gain adjusting units

223L and 224L may be included in the low pass filter 220L and the high pass filter 221L, respectively.

The right channel audio signal input unit 212R inputs the right channel audio signal and supplies it to the low-

pass filters

220R and 227R and the high-pass filter 221R.

The low-pass filter 220R is a filter that passes a signal having a frequency lower than the lower limit frequency FL in the middle range. The frequency characteristics of the low-pass filter 220R are also shown on the left side of FIG. 6B, similar to the low-pass filter 220L. The low-frequency audio signal that has passed through the low-pass filter 220R is input to the adder 225R after the gain is adjusted by the gain adjusting unit 223R. The high-pass filter 221R is a filter that passes a signal having a frequency equal to or higher than the upper limit frequency FH in the middle sound range. The frequency characteristics of the high-pass filter 221R are also shown on the right side of FIG. 6B, similar to the high-pass filter 221L. The high-frequency audio signal that has passed through the high-pass filter 221R is input to the adder 225R after the gain is adjusted by the gain adjusting unit 224R. The adder 225R adds and synthesizes the audio signal of the low-frequency range and the high-frequency range of the right channel. This added and synthesized audio signal is amplified by the amplifier 226R and supplied to the speaker unit 210R. Note that the

gain adjustment units

223R and 224R may be included in the low-pass filter 220R and the high-pass filter 221R, respectively.

Also, the low-pass filter 227L for the left channel is a filter that passes a signal having a frequency lower than the upper limit frequency FH in the middle sound range. FIG. 6A shows the frequency characteristics of the low-pass filter 227L. The gain of the audio signal that has passed through the low-pass filter 227L is adjusted by the gain adjusting unit 228L, and is input to the adder 230C. The right-channel low-pass filter 227R is a filter that passes a signal having a frequency equal to or lower than the upper limit frequency FH in the middle sound range. The frequency characteristics of the low-pass filter 227R are also shown in FIG. 6A, similar to the low-pass filter 227L. The gain of the audio signal that has passed through the low-pass filter 227R is adjusted by the gain adjusting unit 228R and input to the adder 230C. The adder 230C adds and synthesizes the audio signals in the middle range of the left and right channels.

The added and synthesized audio signal is input to the delay unit 231C. The delay unit 231C delays the audio signal by a predetermined delay time and outputs it. The delay time is set to a time until the sound emitted from the

speaker units

210L and 210R is reflected by the wall 80 and returns to the vicinity of the installation position of the speaker device 1. Thereby, the user arrival timing of the sound emitted from the

speaker units

210L and 210R and the sound emitted from the speaker unit 211C can be matched. The audio signal delayed by the delay unit 231C is amplified by the amplifier 229C and supplied to the speaker unit 211C. The

gain adjusting units

228L and 228R may be included in the low pass filter 227L and the low pass filter 227R, respectively.

The audio signals output from the low-pass filters 227L and R include low-frequency components. However, since the speaker unit 211C is a mid-range speaker unit and does not emit low-frequency sounds, sound is output from the speaker unit 211C. The voice to be played is a voice only in the middle range obtained by correcting the filter characteristic of FIG. 2A with the dotted speaker characteristic. Note that the low-pass filters 227L and R may be bandpass filters in the middle sound range.

The delay amount (delay time) of the delay unit 231C and the gains of the gain adjustment units 223L, R, 224L, R, 228L, and R are set by the control unit 50. Independently control the gains of the gain adjustment units 223L, R for adjusting the low frequency range gain, the gain adjustment units 224L, R for adjusting the high frequency range gain, and the gain adjustment units 228L, R for adjusting the mid range gain. Thus, the gain adjustment units 223L, R, the gain adjustment units 224L, R, and the gain adjustment units 228L, R can be functioned as an equalizer. Since the adjacent sound ranges are emitted from separate speaker units, when the gain of the high, middle, and low frequencies is adjusted, the sound with independent gain adjustment is released without affecting the adjacent sound ranges. Sounded.

In this way, the low frequency component signal and the high frequency component signal are amplified by the same amplifier and emitted from the same speaker unit 210, and the middle frequency component signal is amplified by a separate amplifier from the low frequency component signal. By emitting sound from another speaker unit, it is possible to separate a high sound region, a middle sound region, and a low sound region with a 2-way speaker device, and independent gain adjustment is facilitated. For example, when boosting the low frequency range, in a conventional speaker device that divides the system into middle / high frequencies, the gain increases due to the boost in the low frequency range, and the sound quality of the mid frequency range changes. In addition, although it will put a burden on the amplifier that amplifies the middle bass, in the speaker device 1 of this embodiment, even if the bass range is boosted, the middle tone range is not affected, and the sound quality changes, There is no burden on the speaker unit.

FIG. 7 is a diagram illustrating a method of calculating a delay amount (delay time) set in the delay unit 231C. FIG. 7A is a diagram for explaining a calculation method for a delay amount when the installation form is “corner placement”, and FIG. 7B is a diagram for explaining a calculation method for a delay amount when the installation form is “wall placement”. FIG. Here, A is a half length of the diagonal line of the planar shape (substantially square) of the speaker device 1, and B is a length from the center of the planar shape of the speaker device 1 to the speaker unit 210 (L / R). , B = A * cos 40 °. That is, the speaker unit 210 is provided in a direction of 40 ° from the diagonal line in the front-rear direction of the housing 11.

The planar sizes A and B of these speaker devices 1 are stored in advance. The distance L to the wall 80 (corner 81) behind the speaker device 1 and the installation form are input by the user. When the installation form and the distance L to the wall 80 are input, the distance X between the speaker unit 210 and the wall surface is calculated by the following arithmetic expression. Expression 1 is an arithmetic expression for corner placement, and Expression 2 is an arithmetic expression for wall placement. The distance X corresponds to the distance until the sound emitted from the speaker unit 210 reaches the wall 80.

X = ((L + A) / cos45 °) / cos5 ° (Equation 1)

X = ((L + A) / cos40 ° (Equation 2)

In this embodiment, twice the calculated distance X (2X) is approximately emitted from the speaker unit 211 and the route until the sound emitted from the speaker unit 210 reaches the user. The delay time D for canceling the distance difference 2X is calculated and set in the delay unit 231C. Note that the delay time for canceling the “distance difference between the route until the sound emitted from the speaker unit 210 reaches the user and the route until the sound emitted from the speaker unit 211 reaches the user” is canceled. The calculation method is not limited to the method described in FIG.

The installation form and the distance L to the wall 80 are input by the user using a remote control device that communicates with the speaker device 1 via Bluetooth. As the remote control device, for example, a multi-function mobile phone (smart phone) in which a controller application program is installed is used. The calculation of the distance X and the delay time D based on the installation form and the distance L input by the user may be performed by the remote control device or the control unit 50 of the speaker device 1. Further, the remote controller and the control unit 50 may share these calculations.

FIG. 8 is a block diagram of a mobile phone 300 that executes a DTA controller application program 350 that communicates with the multi-function mobile phone (hereinafter simply referred to as a mobile phone) speaker device 1 having a remote control function via Bluetooth and performs sound settings. It is. Note that the cellular phone 300 in which the DTA controller application program 350 is executed functionally configures the DTA controller 400 shown in FIG.

The mobile phone 300 has a control unit 320, an operation unit 330, a media interface 331, a 3G / 4G communication circuit 332, a Bluetooth communication circuit 333, and a Wi-Fi communication circuit 334 on the bus 326. The control unit 320 includes a CPU 321, a ROM (flash memory) 322, a RAM 323, an image processor 324, and an audio processor 325. A video RAM (VRAM) 340 is connected to the image processor 324, and a display unit 341 is connected to the VRAM 340. The display unit 341 includes a liquid crystal display, and displays a standby screen, a telephone number, and the like. The screen of the DTA controller 400 is also displayed on the display unit 341. An amplifier 342 including a D / A converter is connected to the audio processor 325, and a speaker 316 is connected to the amplifier 342.

The image processor 324 includes a GPU (Graphics Processing Unit, graphics processing unit) that generates various images such as a standby screen and a telephone number. When the DTA controller application program 350 is activated, the image processor 324 generates an image of the DTA controller as shown in FIGS. 11 to 13 in accordance with an instruction from the CPU 321 and develops it on the VRAM 340. The image developed on the VRAM 340 is displayed on the display unit 341.

The voice processor 325 has a DSP (Digital Signal Processor) that encodes / decodes call voice. The audio processor 325 outputs the decoded / generated audio to the amplifier 342. The amplifier 342 amplifies this audio signal and outputs it to the speaker 316.

The 3G / 4G communication circuit 332 performs a voice call and data communication via a mobile phone communication network. Application programs such as a DTA controller are downloaded by data communication. The application program may be acquired not only by downloading through 3G / 4G communication but also through an interface such as Wi-Fi communication or USB.

The Bluetooth communication circuit 333 communicates with a device selected and set (paired) as a counterpart device. The DTA controller application program 350 (DTA controller 400) communicates with the speaker device 1 and transmits the installation form and the distance L described above.

The Wi-Fi communication circuit 334 performs wireless communication of the IEEE 802.11g standard with a wireless access point. The communication with the speaker device 1 may be a DLNA (Digital Living Network Alliance).

The operation unit 330 includes a touch panel formed on the display unit 341, and detects a touch operation or a flick operation on the touch panel. A memory card 315 is connected to the media interface 331. The memory card 315 is, for example, a micro SD card. The application program downloaded from the server by the 3G / 4G communication circuit 332 is stored in the memory card 315 or the ROM 322. In the mobile phone 300, as shown in FIG. 8, a DTA controller application program 350 is stored in the memory card 315. The DTA controller application program 350 includes data necessary for executing the program in addition to the program body. Data necessary for executing the program is, for example, image data for displaying the screens shown in FIGS. 11 to 13, a gain correction table shown in FIG.

The ROM 322 stores a basic program for executing calls and application programs of the mobile phone 300. The ROM 322 is a flash memory, and can store a downloaded application program in addition to the basic program. A work area used when the CPU 320 executes the DTA controller application program 350 is set in the RAM 323.

The cellular phone 300 configures a DTA controller 400 as shown in FIG. 9 in cooperation with the DTA controller application program 350 stored in the memory card 315, transmits a message to the speaker device 1 via Bluetooth, and transmits the speaker. The apparatus 1 is controlled.

Referring to the functional block diagram of FIG. 9, the DTA controller 400 realized by reading the DTA controller application program 350 into the mobile phone 300 (hardware) will be described. The DTA controller 400 includes an operation screen display unit 410, an operation detection unit 420, a message editing / transmission unit 430, and a state acquisition unit 440.

The operation screen display unit 410 is realized by the cooperation of the control unit 320, the VRAM 340, the display unit 341, and the DTA controller application program 350, and displays various operation screens on the display unit 341 of the mobile phone 300. The operation detection unit 420 is realized by the cooperation of the control unit 320, the operation unit 330, and the DTA controller application program 350, and performs an operation on the operation screen displayed on the display unit 341 (for example, an installation mode selection operation or a distance L). Input operation). The detected operation information is input to the operation screen display unit 410, the message edit transmission unit 430, and the like.

The message editing / transmitting unit 430 is realized by the cooperation of the control unit 320, the Bluetooth communication circuit 333, and the DTA controller application program 350. The message editing / transmission unit 430 edits a message corresponding to the operation information based on the operation information such as the installation form and the distance L input from the operation detection unit 420. Then, the message is transmitted to the speaker device 1. When the DTA controller 400 calculates the distance X and the delay time D based on the installation form and the distance L, the message includes the delay time D (and the distance X). When the control unit 50 of the speaker device 1 performs the above calculation, the message includes the installation form and the distance L.

The state acquisition unit 440 is realized by the cooperation of the control unit 320, the Bluetooth communication circuit 333, and the DTA controller application program 350. The state acquisition unit 440 makes an inquiry to the speaker device 1 and acquires the operation state of the speaker device 1. The operation state includes an installation form, a distance L, the above-described gain adjusting units 223L and R, gain adjusting units 224L and R, and equalizer setting contents including the gain adjusting units 228L and R, and the like. The acquired operation state is reflected in the initial value of the operation screen shown in FIG.

FIG. 10 is a diagram showing a tree structure of the display screen of the DTA controller 400. 11 to 13 are diagrams showing examples of option screens in the display screen.

10, when the DTA controller 400 is activated, a top screen 501 is formed on the display unit 341 by the operation screen display unit 410. On the top screen 501, a playback button 502, a schedule button 503, and a setting button 504 are displayed. When the play button 502 is tapped (short press operation) on the top screen 501, the screen formed on the display unit 341 shifts from the top screen 501 to the play screen 510. On the playback screen 510, a source device selection window 511 and an operation button group 512 are displayed. The source device selection window 511 displays a plurality of source devices (for example, a device selected by Bluetooth, a device connected by the cable connector 55). The user taps and selects a desired one of these devices. Then, an operation button group 512 for operating the selected device is displayed on the display unit 341.

Also, an option button 513 is displayed on the playback screen 510. The option button 513 is a button for shifting the screen to the option screen 530 for inputting the installation form and the distance L described above. When the option button 513 is tapped, the screen formed on the display unit 341 moves from the playback screen 510 to the option screen 530.

When the schedule button 503 is tapped on the top screen 501, the screen formed on the display unit 341 is changed from the top screen 501 to the schedule screen 520 for setting the playback and lighting schedule of the speaker device 1 on a weekly basis. Transition. When the setting button 504 is tapped on the top screen 501, the screen formed on the display unit 341 shifts from the top screen 501 to a setting screen 521 for performing Bluetooth pairing processing, clock synchronization, and the like. To do.

FIG. 11A is a diagram showing an option screen 530 formed on the display unit 341. The option screen 530 displays a sound environment button 531, an EQ (sound adjustment) button 532, and a return button 533. The sound environment button 531 is a button for shifting the screen formed on the display unit 341 to the sound environment setting screen 540 shown in FIG. The sound environment setting screen 540 is a screen for inputting the installation mode and the distance L described above. The EQ button 532 is a button for shifting the screen formed on the display unit 341 to the equalizer screen 560 shown in FIG. The return button 533 is a button for returning the screen formed on the display unit 341 to the playback screen 510.

11B, on the equalizer screen 560, a low sound range gain adjustment unit 561, a middle sound range gain adjustment unit 562, a high sound range gain adjustment unit 563, and a flat button 564 are displayed. The low-frequency range gain adjustment unit 561 includes a bar graph 561A indicating a set gain, an up button 561U, and a down button 561D. When the up button 561U is pressed down by the user, the gain in the low frequency range increases according to the operation time or number of times, and the colored portion of the bar graph 561A extends upward or extends downward Will shrink. When the down button 561D is pressed down by the user, the gain of the low range decreases according to the operation time or the number of times, and the colored portion of the bar graph 561A extends downward or extends upward Will shrink. The configuration and operation of the mid-range gain adjustment unit 562 and the high-range gain adjustment unit 563 are the same as those of the low-range gain adjustment unit 561. Further, when the flat button 564 is tapped, all gains in the low sound range, the middle sound range, and the high sound range are reset to 0 dB (center of the graph). When the equalizer screen is operated by the user, the message editing transmission unit 430 transmits the gain set by the operation to the speaker device 1 in real time.

12, on the sound environment setting screen 540, an arrangement selection button 541 (541A, 541B, 541C), a distance input unit 542, a wall selection button 544, and a return button 545 are displayed. The arrangement selection button 541 (541A, 541B, 541C) is a button for inputting an installation form of the speaker device 1, and is displayed by a predetermined icon, for example. The button 541A is tapped by the user when the speaker device 1 is in the corner position shown in FIG. The button 541C is tapped by the user when the speaker device 1 is placed on the wall shown in FIG. The button 541B is a button that is tapped when the speaker device 1 is placed between the corner placement and the wall placement, that is, when the speaker device 1 is placed on the back at the corner of the room. When any of the arrangement selection buttons 541 is tapped, the operation screen display unit 410 displays a plan view 543 of the selected installation form on the sound environment setting screen 540. A plan view 543 of FIG. 12 shows a display example when the squarely placed button 541A is tapped.

12, the plan view 543 shows the distance L from the speaker device 1 to the position on the wall 80 (corner 81). The distance input unit 542 includes a bar graph 542A representing a distance L, a + button 542U, and a − button 542D. When the + button 542U is pushed down by the user, the distance L increases according to the operation time or the number of times, and the colored portion of the bar graph 542A extends rightward. In addition, when the user presses down the-button 542D, the distance L decreases according to the operation time or the number of times, and the colored portion of the bar graph 542A shrinks to the left. When the screen formed on the display unit 341 leaves the sound environment setting screen 540 by a user operation, the installation form and the distance L input on the sound environment setting screen 540 are determined.

When the DTA controller 400 calculates the distance X and the delay time D, the operation detection unit 420 calculates the distance X and the delay time D based on the input installation form and the distance L, and the message edit transmission unit. 430 transmits the delay time D to the speaker device 1. In the speaker device 1, the Bluetooth communication circuit 54 receives this delay time D and inputs it to the control unit 50, and the control unit 50 sets this delay time D in the delay unit 231 C of the signal processing unit 201.

When the control unit 50 of the speaker device 1 calculates the distance X and the delay time D, the message editing / transmission unit 430 of the DTA controller 400 transmits the input installation form and the distance L as a message to the speaker device 1 as it is. . In the speaker device 1, the Bluetooth communication circuit 54 receives the installation form and the distance L and inputs them to the control unit 50, and the control unit 50 calculates the distance X and the delay time D, and uses the delay time D as the signal processing unit 201. This delay time D is set in the delay unit 231C.

Further, when the wall selection button 544 is tapped on the sound environment setting screen 540, the screen formed on the display unit 341 shifts from the sound environment setting screen 540 to the wall selection screen 550 shown in FIG. On the wall selection screen 550, a wall selection button 551 and a bass range gain adjustment unit 552 are displayed. This wall selection screen 550 is a screen for correcting the equalizer by allowing the user to input the type of the wall 80 behind the speaker device 1 because the sound reflection efficiency varies depending on the type of wall. For example, this is a setting screen for causing the speaker device 1 to perform processing such as emphasizing bass when the selected wall is made of a material with low reflectivity and suppressing emphasis of bass when the material with high reflectance is used.

The wall selection button 551 is a button for selecting the type (material) of the wall behind the speaker device 1. The following four types of buttons, the “partition wall / door” button 551A indicating a hollow wall, It includes a “concrete wall” button 551B that indicates a hard wall, a “slider / paper sliding door” button 551C that indicates a paper or cloth partition, and other buttons 551D that are operated when unknown or unknown.

The DTA controller 400 (the message editing / transmission unit 430 or the state acquisition unit 440) stores a gain correction table as illustrated in FIG. In the gain correction table, gain correction values for the low, middle, and high sound ranges of the equalizer are written according to the type of the wall 80 behind the speaker device 1. When the wall selection button 551 is operated by the user and the wall type is selected, the DTA controller 400 reads the gain correction value corresponding to the wall type, and sets the setting value on the equalizer screen 560 in FIG. The gain correction value is added and corrected, and the corrected set value is transmitted to the speaker device 1.

The low-frequency range gain adjustment unit 552 is an operation unit for adjusting the low-frequency range gain according to the user's preference, and is the same as the low-frequency range gain adjustment unit 561 on the equalizer screen in FIG. It is. The low-frequency range gain adjustment unit 552 includes a bar graph 552A, a + button 552U, and a − button 552D that represent low-frequency range gain. When the user presses down the + button 552U, the gain in the low frequency range increases according to the operation time or frequency, and the colored portion of the bar graph 552A extends to the right. In addition, when the user presses down the − button 552D, the low-frequency gain decreases according to the operation time or frequency, and the colored portion of the bar graph 552A shrinks to the left. When the equalizer screen is operated by the user, the message editing transmission unit 430 transmits the gain set by the operation to the speaker device 1 in real time.

Note that the shape of the housing 11 of the speaker device 1 is not limited to a quadrangular pyramid shape, but may be a substantially columnar shape such as a truncated cone shape, a cylindrical shape, or a polygonal column shape, and a necessary part such as a speaker unit can be incorporated. Any shape can be used. Any component of this embodiment can be freely modified without departing from the spirit of the present invention. Note that the mid-range speaker unit 211C may be provided not in the upward direction but in the front direction.

This application is based on Japanese Patent Application No. 2013-176231 filed on August 28, 2013, the contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 10 Headpiece 11 Case 15 Electronic circuit 201 Signal processing part 202

Speaker drive part

210L, 210R, 211C Speaker unit 300 Mobile telephone 400 DTA controller

Claims

A housing having an opening on the back surface and the top surface or the front surface;
A first speaker unit provided in the opening on the back surface;
A second speaker unit provided in the opening on the upper surface or the front surface;
A delay unit for delaying sound emitted from the second speaker unit;
An installation form showing the arrangement of the housing with respect to the wall in the back direction of the housing, and an operation receiving means for receiving an input of a back surface distance that is a distance from the wall;
Calculation means for calculating the delay time of the delay unit based on the installation form and the back distance input from the operation reception means;
Setting means for setting the delay time calculated by the calculating means in the delay unit;
A speaker device comprising:
An audio playback system having a speaker device and a remote control device,
The speaker device
A housing having an opening on the back surface and the top surface or the front surface;
A first speaker unit provided in the opening on the back surface;
A second speaker unit provided in the opening on the upper surface or the front surface;
A delay unit for delaying sound emitted from the second speaker unit;
A communication unit communicating with the remote control device;
With
The remote control device is
A communication unit communicating with the speaker device;
An installation form showing the arrangement of the housing with respect to a wall in the back direction of the housing, and an operation accepting means for accepting a user operation by displaying an operation screen for accepting an input of a back distance, which is a distance from the wall. ,
Transmitting means for transmitting the installation form and back distance input from the operation accepting means to the speaker device;
With
The speaker device
Calculation means for calculating the delay time of the delay unit based on the installation form and the back distance received from the remote control device;
Setting means for setting the delay time calculated by the calculating means in the delay unit;
Audio playback system.
An audio playback system having a speaker device and a remote control device,
The speaker device
A housing having an opening on the back surface and the top surface or the front surface;
A first speaker unit provided in the opening on the back surface;
A second speaker unit provided in the opening on the upper surface or the front surface;
A delay unit for delaying sound emitted from the second speaker unit;
A communication unit communicating with the remote control device;
With
The remote controller is
A communication unit communicating with the speaker device;
An installation form showing the arrangement of the housing with respect to a wall in the back direction of the housing, and an operation accepting means for accepting a user operation by displaying an operation screen for accepting an input of a back distance, which is a distance from the wall. ,
Calculation means for calculating the delay time of the delay unit based on the installation form and the back distance input from the operation reception means;
Transmitting means for transmitting the delay time calculated by the calculating means to the speaker device;
With
The audio reproduction system, wherein the speaker device includes setting means for setting the delay time received from the remote control device in the delay unit.
The speaker device
A mid-range filter that extracts a mid-range component signal including a human voice from an audible frequency band of the input audio signal and supplies the mid-range component signal to the second speaker unit;
A low-frequency filter and a high-frequency filter that take out a low-frequency component signal and a high-frequency component signal other than the middle-frequency component signal and supply them to the first speaker unit;
An equalizer for independently controlling the gains of the output signals of the low range filter, the mid range filter and the high range filter;
The audio reproduction system according to claim 2 or 3, further comprising:
As the second speaker unit, a mid-range speaker in which the sound emission characteristic of the low range is suppressed,
The audio reproduction system according to claim 4, wherein the mid-range filter is a low-pass filter that extracts a signal component below the mid-range including the low-range component.
The remote control device is
A second operation accepting means for displaying an operation screen for accepting an input of the wall type and accepting a user operation;
Gain correcting means for correcting the gain of the equalizer in accordance with the type of the wall input by the second operation accepting means;
Second transmitting means for transmitting the corrected gain to the speaker device;
Further comprising
The audio reproduction system according to claim 4 or 5, wherein the speaker device sets a gain received from the remote control device in the equalizer.
The operation screen of the remote control device displays a plurality of installation forms respectively indicating different arrangements of the casing with respect to the wall in the rear direction of the casing, and the operation receiving means is one installation from the plurality of installation forms The audio reproduction system according to any one of claims 4 to 6, wherein an operation of a user who selects a form is received.
A mobile phone computer that can communicate with the speaker device,
Operation for accepting a user's operation by displaying an installation screen showing an arrangement of the housing with respect to a wall in the rear direction of the housing of the speaker device and an operation screen for accepting an input of a back distance, which is a distance from the wall. Reception means, and
Transmitting means for transmitting the installation form and back distance input from the operation accepting means to the speaker device;
Program to function as.
A mobile phone computer that can communicate with the speaker device,
Operation for accepting a user's operation by displaying an installation screen showing an arrangement of the housing with respect to a wall in the rear direction of the housing of the speaker device and an operation screen for accepting an input of a back distance, which is a distance from the wall. Reception means,
Calculation means for calculating the delay time of the delay unit of the speaker device based on the installation form and the back distance input from the operation receiving means; and
Transmitting means for transmitting the delay time calculated by the calculating means to the speaker device;
Program to function as.
A mobile phone computer that can communicate with the speaker device,
Operation for accepting a user's operation by displaying an installation screen showing an arrangement of the housing with respect to a wall in the rear direction of the housing of the speaker device and an operation screen for accepting an input of a back distance, which is a distance from the wall. Reception means,
Calculation means for calculating a delay time of the delay unit of the speaker device based on the installation form and the back distance input from the operation receiving means;
Transmitting means for transmitting the delay time calculated by the calculating means to the speaker device;
A second operation accepting means for displaying an operation screen for accepting an input of the wall type and accepting a user operation;
Gain correcting means for correcting the gain of the equalizer of the speaker device in accordance with the type of the wall inputted by the second operation accepting means; and
Second transmission means for transmitting the corrected gain to the speaker device;
Program to function as.