JP2001086600A - Surround system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surround system that can provide an optimum surround effect at all times even when a listening position of a user is changed without the need for placing a plurality of loudspeakers around the user to obtain the surround effect. SOLUTION: A CPU 15 calculates an angle of output axes of loudspeakers 23a-23d and its arrival distance where sounds outputted from the 4 loudspeakers 23a-23d of a surround control section 32 are made incident onto each wall face in a room, reflected further in each wall face and reach a listening position at the shortest distance on the basis of a size of the interior of the room, positions of the loudspeakers 23a-23d placed on a ceiling face in the room and the listening position of a user in the room.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surround sound device for reproducing a sound field with a sense of realism by using a plurality of speakers, and more particularly to a surround sound device for realizing an excellent sound field reproduction regardless of a user's listening position. Things.

[0002]

2. Description of the Related Art In recent years, in an audio system for watching a movie, music, or the like, in order to realize a realistic sound field reproduction, a plurality of speakers are used so that a listener feels a sense of direction of a sound source while reproducing sound. Surround devices that provide a feeling of being surrounded and a feeling of spreading are used. FIG. 6 is an explanatory diagram showing a surround state by a conventional surround device.

[0003] As shown in FIG. 6, a conventional surround device is provided in a room 50 and has a surround reproducing device 51 and a center speaker 41 disposed in front of a center of a listening position 52, and a left and right side of the listening position 52. It comprises a front speaker 42 and a front speaker 43 arranged in front, and a rear speaker 44 and a rear speaker 45 arranged left and right behind the listening position 52.

Next, the operation of such a conventional surround device will be described with reference to the drawings. In a conventional surround device, a surround reproduction device 51 reproduces reproduction information recorded on a recording medium (not shown) and corresponds to each speaker of a center speaker 41, a front speaker 42, a front speaker 43, a rear speaker 44, and a rear speaker 45. The sound signal is converted into a sound signal, and the sound signal is output, and the speakers output the sound signals as independent sounds 41S to 45S toward the listening position 52.

As described above, in the conventional surround sound reproducing apparatus, a plurality of speakers are arranged around a listener, and the plurality of speakers output independent sounds. The movement of the sound was realized, and a surround sound field effect with a three-dimensional effect was realized.

[0006]

However, the conventional surround device has the following problems. That is, as a first point, a conventional surround device is
In order to realize a realistic sound field reproduction, a center speaker 41, a front speaker 42, a front speaker 43, a rear speaker 44, around a listening position 52 in the room 50,
And the rear speakers 45 were arranged,
When the space for arranging the speakers cannot be secured, for example, when the rear speaker 45 cannot be arranged, there is a problem that a good surround effect cannot be obtained.

Second, in the conventional surround device, after a user's listening position 52 is determined in advance, the center speaker 41, the front speaker 42, the front speaker 43, the rear speaker 44, and the rear speaker 45 are connected to each other. It is arranged so that an optimal surround effect can be obtained by the user listening at the listening position 52. However, when the user listens at a position outside the listening position 52, the optimal surround effect is obtained. There was a problem that cannot be obtained.

Therefore, an object of the present invention is to eliminate the necessity of disposing a plurality of speakers for obtaining a surround effect around a user, and to always obtain an optimum surround effect even when the listening position of the user changes. It is to provide a surround device that can be used.

[0009]

In order to solve the above-mentioned problems, a surround device according to the present invention is provided on a ceiling surface of a room, inputs an acoustic signal, and emits sound toward each wall surface in the room. A surround device including at least four or more speakers to output, a speaker drive unit that receives an input of a drive signal and controls an output shaft of the speaker to be supported,
An input unit for inputting a size of the room, a position of a speaker arranged on a ceiling surface of the room, a reflection sound characteristic of each wall surface in the room, and a listening position of a user in the room, and an input from the input unit. A storage unit that stores, as room information, the size of the room, the position of a speaker disposed on the ceiling surface of the room, the reflection sound characteristics of each wall surface in the room, and the position of a user in the room. A control unit that outputs a drive signal to the speaker drive unit based on the room information stored in a storage unit, wherein the control unit corrects an input acoustic signal based on the room information stored in the storage unit. And a control unit for outputting to a speaker. Further, the control unit, as a surround sound signal, front, left front,
It is characterized by inputting audio signals corresponding to the five front right, left rear and right rear speakers and outputting audio signals corresponding to the four front, left, right and rear speakers. .

[0010]

Next, a surround device according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view for explaining a surround device according to an embodiment of the present invention. FIG. 2 is a block diagram for explaining the configuration of the surround device according to one embodiment of the present invention. FIG. 3 is a perspective view for explaining a method of attaching a surround device according to an embodiment of the present invention. FIG. 4 is a perspective view for explaining position information input to the surround device according to one embodiment of the present invention. FIG. 5 is an explanatory diagram showing a surround state by the surround device according to the embodiment of the present invention.

As shown in FIG. 1, a surround device according to an embodiment of the present invention is provided on a ceiling surface 30a of a room 30, inputs an acoustic signal, and emits sound toward each wall surface of the room 30. A surround control unit 32 including four speakers 23 to be output, and the size of the room 30, the position of the speaker 23 disposed on the ceiling surface 30 a of the room 30, The remote controller 10 includes a remote controller 10 as an example of an input unit that transmits a reflected sound characteristic of each wall of the wall 30 and a listening position of a user in the room 30 to the surround control unit 32 as a remote signal, for example, using an infrared signal. It mainly comprises a playback device 31.

More specifically, referring to FIG. 2, the surround playback device 31 includes a playback device body 18 for playing back playback information recorded on a storage medium (not shown), and an audio signal input from the playback device body 18. Acoustic signal transmission unit 1 that outputs to a surround control unit 32 using an infrared signal
9 is provided. Also, the surround control unit 32
Is the sound signal transmission unit 19 of the surround playback device 31
Signal receiving unit 20 for receiving the acoustic signal transmitted from
And an indoor information receiving unit 11 that receives the indoor information transmitted from the remote controller 10, and a random access memory (RAM) 14 as an example of a storage unit that stores the indoor information input via the indoor information receiving unit 11. Store,
The control unit outputs a drive signal to the speaker drive unit 33 based on the room information stored in the RAM 14, and corrects the sound signal input via the sound signal reception unit 20 and outputs the corrected signal to the speaker system 34. As an example,
And a central processing unit (CPU) 15. further,
The speaker system 34 includes a D / A converter 21 that inputs an audio signal from the CPU 15 and outputs an analog audio signal, and a sound for each speaker that connects the analog audio signal input from the D / A converter 21. It comprises an amplifier 22 for separating into signal components, and four speakers 23a to 23d for outputting sound signals input from the amplifier 22 as sounds. The speaker driving unit 33 supplies power to the motors 17 that support the speakers 23 a to 23 d and receives a drive signal from the CPU 15 to supply power to the motors 17, and is supported by the motors 17. The main part of the sound emitted from the speaker 23 is propagated, and as an axis extending in front of the speaker, a speaker angle correction motor controller 16 for controlling an output axis is provided.
And

Further, as shown in FIG. 3, the surround control section 32 can be easily connected to a ceiling lighting mounting power supply device 25 which is provided in advance on the ceiling surface 30a of the room 30.

Next, the operation of the surround device according to one embodiment of the present invention will be described with reference to FIG. The surround device according to an embodiment of the present invention is configured such that when a user starts using the surround device, the user inputs the size of the room 30 as the room information, the position of the speaker 23 disposed on the ceiling surface 30a of the room 30,
The reflected sound characteristics of each wall of the room 30 and the listening position of the user in the room 30 are input by the remote controller 10.

That is, as shown in FIG. 4, the size of the room 30 is a width w1, a depth d1, and a height h1.
Is input, and the width w of the speaker 23 disposed on the ceiling surface 30a of the room 30 when the point A is the origin is set as the position of the speaker 23.
2. The depth d2 and the height h2 are inputted, and the width w3, the depth d3 and the height h3 when the point A is the origin are inputted as the listening position 39 of the user in the room 30. As the reflected sound characteristic of the wall, material information of the wall such as wood, glass, concrete, or the like is input.

The room information input to the remote controller 10 is transmitted to a surround control unit 32,
The information is input to the CPU 15 via the indoor information receiving unit 11. The CPU 15 outputs the indoor 30
(W1, d1, h1), the position (w2, d2, h2) of the speaker 23 disposed on the ceiling surface of the room 30, and the listening position 39 (w3, d3, h3) of the user in the room 30
From above, the sound output from each of the four speakers 23a to 23d of the surround control unit 32 enters each wall surface of the room 30 and is further reflected on each wall surface to reach the listening position 39 in the shortest distance. The angles of the output shafts of the speakers 23a to 23d and the reach distance at that time are calculated, and the calculated angle information of the output shaft is sent to the speaker angle correction motor control unit 16 as a drive signal. It is stored in the RAM 14 as a delay correction value.

FIG. 5 is an explanatory diagram showing a surround state by the surround device according to one embodiment of the present invention. For example, when the room 30 is viewed from above, the sound is output from the speaker 23c of the surround control unit 32. Sound 23c
S is reflected on the wall surface 30b of the room 30 and reaches the listening position 39 as sound 23cS ', but the output of the speaker 23c is set so that the incident angle θ to the wall surface 30c and the emission angle θ' from the wall surface 30c are equal. The angle of the axis is calculated, and is output as a drive signal in the X direction as the left-right direction of the speaker 23c. Similarly, the angle of the output shaft in the vertical direction of the speaker 23c is calculated, and the angles of the output shaft in the horizontal direction and the vertical direction of the other speakers 23a, 23b, and 23d are calculated, and output as a drive signal. Is done.

The speaker angle correction motor controller 16 receives the drive signal from the CPU 15, supplies power to the motor 17 based on the drive signal, and outputs the power from the speakers 23a to 23d supported by the motor 17. Change the axis.

The CPU 15 inputs material information of a wall made of wood, glass, concrete, or the like as a reflection sound characteristic of each wall of the room 30, and stores a frequency correction value corresponding to the material information in the RAM 14. I do.

Next, the recording medium is reproduced by the reproducing apparatus main body 18, and the reproduced audio signal is inputted to the CPU 15 via the audio signal transmitting section 19 and the audio signal receiving section 20. The CPU 15 calculates the delay correction value and the delay correction value calculated from the size of the room 30 stored in the RAM 14, the position of the speaker 23 disposed on the ceiling surface 30 a of the room 30, and the listening position of the user in the room 30. Surround playback device 31 based on frequency correction values based on the reflected sound characteristics of each wall
Of the sound signal input from.

That is, the delay correction value is determined by the speaker 23a.
The sound output from the speaker 23d is reflected on each wall surface of the room 30 to eliminate the difference in the arrival time of the sound caused by the difference in the distance to the user. A correction is made to delay the timing of outputting the sound from. Further, the frequency correction value indicates that the sound output from the speakers 23a to 23d
The frequency component and the sound volume lost in the process of being incident on and reflected from each of the 0 walls are corrected, and the frequency components and the sound volume to be absorbed are amplified in advance and output.

Further, the CPU 15 includes a reproducing device 18.
From the front, the left front, the right front, the left rear, and the right rear are input as surround sound signals, so that the sound signal is input into four front, left, right, and rear speakers. It is output as an acoustic signal corresponding to a book speaker.

The sound signal corrected by the CPU 15 is output as sound via a D / A converter, an amplifier 22 and a speaker 23, and further reflected on each wall of the room 30 at a listening position 39 of the user. A surround sound field is realized.

As described above, according to the surround device according to the embodiment of the present invention, the surround control unit 32 including the speakers 23a to 23d whose output axes can be adjusted is mounted on the ceiling surface 30a of the room 30. The speaker 23a to the speaker 23d receive a sound signal input from the surround playback device 31 using an infrared signal, and output a sound from the speakers 23a to 23d. Since the sound is reflected and input so as to surround the listening position 39, it is possible to obtain a surround effect for realizing a realistic sound field reproduction without disposing a surround speaker at a position surrounding the listening position. The speakers 23a to 24d are the speakers 2
Input of a drive signal calculated by the CPU 15 from the motor 17 supporting the speakers 3a to 23d, the size of the room 30, the position of the speaker 23 disposed on the ceiling surface 30a of the room 30, and the listening position of the user in the room 30 And a motor controller 16 for supplying power to the motor 17 and controlling the output shafts of the speakers 23a to 24d supported by the motor 17. 30 wherever the speaker 2
By controlling the output axes of the speakers 3a to 24d,
An optimal surround effect can always be obtained.

Further, the CPU 15 calculates the delay correction value calculated from the size of the room 30, the position of the speaker 23 disposed on the ceiling surface 30a of the room 30, and the listening position of the user in the room 30, and Since the sound signal input from the surround playback device 31 is corrected by the frequency correction value based on the reflected sound characteristic of the wall surface, the sound output from the speakers 23a to 23d is reflected by each wall surface of the room 30 and reaches the user. To eliminate the difference in the arrival time of the sound caused by the difference in the distance, and the frequency component and the volume lost in the process of the sound output from the speakers 23a to 23d being incident on each wall surface of the room 30 and reflected. Since the amplification is performed, an optimal surround effect for realizing a sound field reproduction with a sense of reality can be obtained. The CPU 15
The sound signals corresponding to the five front, left front, right front, left rear, and right rear speakers, which are input as surround sound signals from the playback device 18, are output as four front, left, right, and rear speakers.
Since it is output as an acoustic signal corresponding to a book speaker,
By converting the input surround sound signal, a simple surround sound field can be realized.

[0027]

As described above, according to the surround device of the present invention, at least four or more of the surround devices arranged on the ceiling surface of a room and inputting an acoustic signal and outputting sound toward each wall surface of the room are provided. The surround device including the speaker of the speaker, receiving the input of the drive signal, the speaker drive unit for controlling the output shaft of the speaker to be supported, the size of the room, the position of the speaker disposed on the ceiling surface of the room, An input unit for inputting reflected sound characteristics of each wall surface in the room, and a position of a user in the room; a size of the room input from the input unit; a position of a speaker arranged on a ceiling surface of the room A storage unit that stores reflected sound characteristics of each wall surface in the room and a listening position of a user in the room as room information, and a drive signal to the speaker drive unit based on the room information stored in the storage unit. Out And a control unit for. Therefore, it is possible to input the sound reflected from each wall surface in the room so as to surround a specific place in the room, and furthermore, the size of the room, the position of the speaker disposed on the ceiling surface of the room, and the room. The reflected sound characteristics of each wall surface, and the listening position of the user in the room, by correcting the difference in the arrival time of the sound caused by the difference in the distance to reach the user reflected on each wall, and from the speaker Since the output sound also corrects the frequency component and volume lost in the process of being incident on and reflected from each wall in the room, there is a sense of presence even if surround speakers are not arranged so as to surround the listener. This produces an effect that sound field reproduction can always be realized in an optimal state. Further, even if the user's listening position changes, by inputting a new listening position via the input unit, the control unit outputs a drive signal to the speaker driving unit based on the new listening position, and outputs a driving signal to the speaker. Since the output shaft is controlled, there is an effect that an optimum surround effect can always be obtained regardless of where in the room. Further, the control unit outputs the front, left, right, and rear four sound signals corresponding to the five front, left front, right front, left rear, and right rear speakers input as surround sound signals. Since the audio signal is output as an audio signal corresponding to the speaker, the input surround audio signal can be converted to realize a simple surround sound field.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a surround device according to an embodiment of the present invention.

FIG. 2 is a block diagram illustrating a configuration of a surround device according to an embodiment of the present invention.

FIG. 3 is a perspective view for explaining a method of attaching a surround device according to an embodiment of the present invention.

FIG. 4 is a perspective view for explaining position information input to the surround device according to the embodiment of the present invention;

FIG. 5 is an explanatory diagram showing a surround state by the surround device according to the embodiment of the present invention;

FIG. 6 is an explanatory diagram showing a surround state by a conventional surround device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Remote controller 11 Indoor information receiving part 14 Random access memory (RAM) 15 Central processing unit (CPU) 16 Motor control part for speaker angle correction 17 Motor 18 Reproduction device main body 19 Acoustic signal transmitting part 20 Acoustic signal receiving part 21 D / A conversion Unit 22 amplifier 23 speaker 31 surround playback device 32 surround control unit 33 speaker drive unit 34 speaker system

Claims (2)

[Claims] 1. A surround device provided with at least four or more speakers arranged on a ceiling surface in a room and configured to input an audio signal and output sound toward each wall surface in the room, comprising a drive signal input device. Receiving, a speaker drive unit that controls the output shaft of the speaker to be supported, the size of the room, the position of the speaker disposed on the ceiling surface of the room, the reflected sound characteristics of each wall surface in the room, and An input unit for inputting a position of a user in a room, and the size of the room input from the input unit, a position of a speaker disposed on a ceiling surface of the room, reflection sound characteristics of each wall surface in the room, and A storage unit that stores the listening position of the user in the room as room information,
A control unit that outputs a drive signal to the speaker drive unit based on the room information stored in the storage unit, and corrects an input acoustic signal based on the room information stored in the storage unit. A surround device comprising: a control unit that outputs to the speaker. 2. The control unit inputs, as surround sound signals, sound signals corresponding to five speakers: front, left front, right front, left rear, and right rear, and outputs the sound signals in front, left, and right directions. The surround sound device according to claim 1, wherein the surround sound device outputs sound signals corresponding to four rear speakers.