JPH05260597A - Sound field signal reproduction device - Google Patents

Abstract

PURPOSE:To obtain similar surround effect only by front speakers without actually arranging rear (side) speakers. CONSTITUTION:This device is equipped with FIR filters 11 and 12 which input sound signals generated by dividing a surround signal of a reverberation or reflected sound, etc., into two and adjust the amplitudes and delay times of those sound signals so that a listener listens to them as sounds from beside or behind and speakers 4 and 6 which reproduce the output signals of those FIR filters 11 and 12 into the respective sounds.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field signal reproducing apparatus for reproducing sound with a realistic sensation in AV (audio / visual) equipment.

[0002]

2. Description of the Related Art In recent years, VTRs have been used in the video and audio fields.
In order to enjoy movies at home due to the widespread use of sound, there is a demand for large-screen and realistic sound reproduction, and the development of hardware that supports this is desired.

Particularly in the sound of VTR movie software, a Dolby surround system in which a speaker is arranged laterally or rearward (or a combination thereof) for reproduction as in a movie theater. Is widespread.

In addition, the high-definition sound reproduction system currently being developed is a front 3ch, rear 1ch 3-1 system 4
Channel stereo playback is likely to be adopted.

FIG. 5 is a block diagram of a conventional sound field signal reproducing apparatus for reproducing sound with a realistic sensation.

In FIG. 5, a speaker 4 is connected to the signal ML (t) 2 to be reproduced from the Lch as seen from the viewer 8 and the signal MR (t as to be reproduced from the Rch as seen from the viewer 8. ) 3 is connected to the speaker 6. Those two
The two signals are further added by an adder 7 that adds them at a certain ratio and output to a speaker 5 arranged in the front center of the viewer 8.

Further, the two signals ML (t) 2 and MR (t) 3 are processed by processing the two signals so that a surround signal to be reproduced from the rear (the input signal is input to a normal room). A signal S (t) of reverberant sound or reflected sound, which is called reverberant sound or reflected sound generated when it is radiated from a speaker, where t represents a continuous time and is a time function. The same applies to the surround signal generating circuit 1 for generating the surround signal S (t), and the output surround signal S (t) is input to the two speakers 9 and 10 arranged on the left and right rear sides of the viewer ( Signals ML (t) 2 and MR (t) 3
Refers to what is commonly referred to as a stereo signal. Further, these are also called main signals with respect to the surround signal S (t) described above).

The operation of the sound field signal reproducing device configured as described above will be described with reference to the drawings.

First, in the configuration of FIG. 5, the 2ch signals ML (t) 2 and MR (t) 3 normally reproduced from a VTR or the like are input to the surround signal generating circuit 1, and operations such as subtraction and addition are performed on these signals. By doing so, a surround signal S (t) such as reverberation or reflected sound is created. Main signal ML (t) 2
And MR (t) 3 are reproduced from the speakers 4 and 6, respectively, and the surround signal S (t) is reproduced from the speakers 9 and 10. The main signals ML (t) 2 and MR (t) 3 are added at a certain ratio by the adder 7, and the added signal is reproduced from the speaker 5.

Further, by using a decoder called a Dolby surround processor or the like instead of the surround signal generating circuit 1, the sound of a movie or the like recorded on 2ch is encoded for Dolby surround. From the signals, a surround signal S (t) that is optimally created on the screen and that is reproduced from the rear and a signal that is reproduced from the front center are obtained. The surround signal S (t) is output from the speakers 9 and 10.
The center signal may be reproduced from the speaker 5.
The surround signal S (t) should be emitted, for example, around the room projected on the screen (reflection sound or reverberation sound) or behind the viewer when the viewer is in the screen. It is added as a sound.

As described above, as compared with the 2ch stereo reproduction system which normally uses two speakers in the front, sounds that were heard from the front and sounds that were not heard are added with surround sounds from the rear. This makes it possible to reproduce sound with a sense of reality. Also, in this system, a center speaker is placed in the front, and the main signal ML (t) 2
And MR (t) 3 are added at an appropriate level and reproduced to clarify the localization of the front sound image.

[0012]

However, in the above configuration, since the sound to be reproduced is heard as the sound from the reproduction place of the sound reproducing means, the sound of the rear side or the like is reproduced to reproduce the surround signal S (t). There has been a problem that a loudspeaker as a regenerating means is necessary and a space for placing the loudspeaker is necessary.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a sound field signal reproducing apparatus capable of making a sound to be reproduced as a sound from a place other than a reproducing place of a sound reproducing means. To do.

[0014]

According to the present invention, an input means for inputting one sound signal, a dividing means for dividing the input sound signal into at least two sound signals, and the divided sound signal. The adjusting means has at least two adjusting means for inputting each, and at least two sound reproducing means connected to each adjusting means for reproducing the transmitted sound reproducing signal as a sound at a predetermined location. On the other hand, the sound field signal reproducing apparatus adjusts the amplitude and the delay time of the divided sound signals so that the sound can be heard as a sound from a place other than a predetermined place, and outputs the sound reproduction signal.

[0015]

In the present invention, the input means inputs one sound signal,
The dividing unit divides the input sound signal into at least two sound signals, and the adjusting unit inputs each of the divided sound signals so that the listener can hear as a sound from a place other than the predetermined place. Then, the amplitude and delay time of each of these sound signals are adjusted and output as a sound reproduction signal, and the sound reproduction means reproduces the sound reproduction signal as a sound at a predetermined location.

[0016]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a sound field signal reproducing apparatus according to the first embodiment of the present invention. That is, the signal ML (t) 2 to be reproduced from the Lch as seen from the viewer 8 and the signal M to be reproduced from the Rch as seen from the viewer 8.
The two signals of R (t) 3 are input to a surround signal creating circuit 1 which creates a surround signal S (t) such as reverberation or reflected sound to be reproduced from the rear by processing the two signals. To be done. An A / D converter 21 for converting an analog surround signal S (t) into a digital signal is connected to the surround signal generating circuit 1 (the input terminal of the A / D converter 21 constitutes an input means), and A / D The output of the D converter 21 is divided into two signals (this branch circuit constitutes the dividing means), and the head related transfer function is set so that the sound is localized leftward or leftward with respect to the viewer 8. It is input to the FIR filters 11 and 12 which are adjusting means for performing digital processing in the time domain and realizing it. FIR filter 11,
12 hL (n) and hR (n) are head-related transfer functions in the time domain that enable the sound to be localized leftward or leftward when a front speaker is used for the viewer 8. It is the impulse response shown.

The output signal ShL (n) of the FIR filter 11 is
The output signal ShR (n) of the FIR filter 12 is output to the output signal ShL (n) by branching into two, one of which is input to the adder 15 and the other of which is input to another adder 16 via the delay unit 13. Same as 2
One is input to the adder 16 and the other is input to the adder 15 via the delay device 14. The delay devices 13 and 14 which are these delay means are composed of a circular memory using a DRAM or the like, and delay the input digital signal by a certain time. Τ1 indicates the delay time divided by the sampling period. ing.

A delay device 17 is connected to the adder 15, and the delay device 17 converts the digital signal into an analog signal D.
The / A converter 24 is connected. A delay device 18 is connected to the other adder 16, and a D / A converter 25 is connected to the delay device 18. Τ 2 of delay device 17, delay device 18
Like τ1, τ3 is to delay the input digital signal by a certain time, and shows the delay time divided by the sampling period. Further, the delay devices 17 and 18 constitute signal delay means, and the adders 15 and 16 which are addition means add a plurality of input signals at an arbitrary ratio.

Further, the D / A converter 24 is connected to the adder 26, the adder 26 is connected to the speaker 4, and the signal ML (t) 2 is input to the adder 26. Also, D / A converter
25 is connected to the adder 27, the adder 27 is connected to the speaker 6, and the signal MR (t) 3 is input to the adder 27. These adders 26 and 27 constitute signal adding means, and the speakers 4 and 6 constitute sound reproducing means.

On the left side of the viewer 8, a second viewer 8-
1 is located, and the third viewer 8-2 is located on the right side of the viewer 8.

Next, a method for localizing sound to the left rear of the viewer 8 using the speakers 4 and 6 placed in front will be described with reference to FIG.

In FIG. 2, 1-1 is a surround signal S
An oscillator for independently generating (t), h1 (t) is the response at the position of the speaker 4 and the left ear of the viewer 8 (more accurately, at the position of the eardrum when an impulse is input to the speaker 4). However, in the case of measurement, it is performed at the position of the auditory canal entrance, and the same applies to the following. This is referred to as the impulse response for the purpose of explanation in the time domain. , H2 (t) is the impulse response at the position of the speaker 4 and the right ear of the viewer 8, and h3 (t) is the speed response.
Impulse response at the position of the left ear of the mosquito 6 and the viewer 8,
h4 (t) is an impulse response at the position of the right ear of the speaker 6 and the viewer 8, 26 is a speaker arranged to the left rear of the viewer, and h5 (t) is the speaker 26 and the viewer. The impulse response at the position of the left ear of the viewer 8 and h6 (t) are the impulse response at the positions of the speaker 26 and the right ear of the viewer 8. The same functions as those in FIG. 1 are indicated by the same reference numerals.

In such a structure, first, the signal S
When (t) is radiated from the speaker 26, the sound reaching the ear of the viewer 8 is L (t) = S (t) * h5 (t) (1) in the left ear L (t). ) In the right ear R (t), R (t) = S (t) * h6 (t) (2) (However, * represents a convolution operation.) -This will be multiplied by the transfer function of self-confidence, etc. This will be ignored. Considering that the transfer function of the speaker etc. is included in h5 (t) and h6 (t). Is also good).

Further, the impulse response and the signal S (t) are considered as digital signals whose time is discrete, and L (t) → L (n) R (t) → R (n) h5 (t) → h5 ( n) h6 (t) → h6 (n) S (t) → S (n) (n is actually nT, and T is the sampling time, but generally T is omitted. In addition, n is a natural number. ,), The equations (1) and (2) are as follows.

[0026]

[Equation 1]

[0027]

[Equation 2]

Here, N is the impulse response h5 (n), h6
It is the length of (n).

Similarly, the signal S (t) is supplied to the loudspeakers 4 and 6.
When emitted from the left ear L '
In (t), L '(t) = S (t) * hL (t) * h1 (t) + S (t) * hR (t) * h3 (t) ... (3) Right ear R' (t ), R '(t) = S (t) * hL (t) * h2 (t) + S (t) * hR (t) * h4 (t) ... (4) Considering that, L '(n) = S (n) * hL (n) * h1 (n) + S (n) * hR (n) * h3 (n) ... (5) R' (n) = S (n) * hL (n) * h2 (n) + S (n) * hR (n) * h4 (n) (6)

Here, it is assumed that the sounds are heard from the same direction if the head-related transfer functions are equal. This assumption is generally correct), and when L (n) = L '(n) ... (7), h5 (n) = hL (n) * h1 (n) + hR (n) * h3 (n) ... (8) When R (n) = R '(n) ... (9), h6 (n) = hL (n) * h2 (n) + hR (n ) * H4 (n) ... (10), so that the viewer 8
To hear from the left rear against
It suffices to determine hL (n) and hR (n) so that (8) and equation (10) are satisfied. For example, if the formulas (8) and (10) are rewritten in the frequency domain expression, the convolution operation is replaced by multiplication, and after that, each impulse response is FFTed into a transfer function. Since the transfer functions other than the two transfer functions of the FIR filters 11 and 12 are obtained by measurement, the transfer functions of the FIR filters 11 and 12 can be obtained from these two expressions (8) and (10). Using hL (n) and hR (n) thus determined,
The signals S (n) and hL (n) are sent from the speaker 4 to the speaker 6
By radiating a convolution of the signals S (n) and hR (n), the viewer 8 feels that a sound is coming from the rear even if the speaker 26 at the rear is not actually sounded. It becomes possible.

FIR is the actual convolution operation.
The filters 11 and 12. The basic structure of the FIR filters 11 and 12 is shown in FIG. In FIG. 3, a delay element 29 for delaying the signal by τ time is applied to an input terminal 28 for inputting the signal.
Are connected in series, and a multiplier 30 that multiplies an input signal by what is called a tap coefficient is provided across the delay elements 29.
Are connected. The other ends of the multipliers 30 are connected to an adder 31 that adds a plurality of input signals, and an output terminal 32 that outputs the added signals is connected to the adder 31. H (n) (n: 0 to N-1) of the multiplier 30 is an impulse response having a certain characteristic set as a tap coefficient. Normally, such a FIR filter is used as a DSP or a dedicated LSI that performs multiplication and addition at high speed. The impulse response h (n) is set as a tap coefficient in the multiplier 30 as shown in the figure, and the delay time corresponding to the sampling frequency when converting an analog signal into a digital signal is set in the delay element 29, which is input. By repeating multiplication and addition and delay with respect to the respective signals, the convolution operation as shown in (Equation 1) and (Equation 2) is executed. Therefore, by inputting a signal to this FIR filter, the characteristics of the impulse response h (n) are convoluted with the input signal and output. Since the above is the case of a digital signal, this F is actually
An A / D converter for converting an analog signal into a digital signal is required before the IR filter, and a D / A converter for converting a digital signal into an analog signal is required behind the IR filter (omitted in FIG. 2).

Next, the operation of this embodiment will be described with reference to FIG.

2ch signal M normally reproduced from a VTR or the like
L (t) 2 and MR (t) 3 are input to the surround signal creating circuit 1 and the surround signal S (t) such as reverberation or reflected sound is created by performing an operation such as subtraction or addition on these two signals. The surround signal S (t) is converted into a digital signal S (n) by the A / D converter 21. This S (n)
Is divided into two signals, and as described above, the impulse response h that localizes the sound to the left or rear of the viewer 8 is generated.
FIR filter 1 having L (n) and hR (n) as tap coefficients 1
Input to 1 and 12, respectively, and perform convolution operation. These results are each branched into two, one of which is input to the adders 15 and 16 as it is, and the other of which is delayed by τ1 by the delay devices 13 and 14, respectively, and the other adders 16 and 15 are respectively added.
Are added to each and added at a certain ratio. That is, with respect to the delayed one, the left and right are set to be opposite to the non-delayed one. As a result, the non-delayed signals ShL (n) and ShR (n) localize the sound to the left (or rear) of the viewer 8, and the delayed signal is reversed to the left and right ShR (n). -τ1), ShL (n-τ1) from the sound to the left (or rear) to the viewer 8
The sound will be localized rightward (or backward) with a delay of 1.

In this way, the time difference (ie, between ShL (n) and ShL (n-τ1), ShR (n) and S) is added to each signal.
By giving hR (n-τ1)), it is possible to separate the signals for lateralizing the sound to the left and right side (or rear), and the lateral or rearward localization feeling (here The so-called localization feeling refers to a vague sense that the sound is being produced laterally or backward, and does not refer to the clear localization of the sound image that is normally used, and so on). .. For example, since the normal surround signal S (t) is a monaural signal, if sounds are presented at the same time without giving a time difference to the left and right signals, the sound image is localized in the middle. In order to avoid this, it is necessary to give a time difference by these delay devices 15 and 16 (τ1 is about 10 msec.
Good degree).

In this manner, after the sound is localized on the left side and the right side of the viewer 8, the delay units 17 and 18 delay the signals by τ2 and τ3, respectively. Here, if τ2 = τ3, for example, the sound is most suitable for the viewer 8, that is, the sound is localized left and right, and τ2>
τ 3 is optimal for the second viewer 8-1,
If τ2 <τ3, the third viewer 8-2 is in the optimum state.

In this way, by giving a time difference to the respective signals by the delay devices 17 and 18, it is possible to localize the sound laterally (or backward) to viewers other than the viewer 8 ( The time difference between τ2 and τ3 should be less than about 1msec).

Next, the output signals of the delay units 17 and 18 are input to the D / A converters 24 and 25, converted from digital signals to analog signals, and the converted signals and the main signal ML (t) 2. MR (t) 3 is input to the adders 26 and 27, added, and output from the speakers 4 and 6. Here, by changing the ratio of addition of the main signals ML (t) 2, MR (t) 3 and the surround signal S (t) processed as described above, the presence and naturalness or the viewer's preference Adjustment is possible.

As described above, by using only two FIR filters 11 and 12 for processing so that the sound is localized to the left side (or the rear side) of one viewer 8 (to the right side or the rear side). By adding delays to the outputs from the respective FIR filters 11 and 12, which are set to the left and right, and adding them to the left and right sides of the viewer Sound can be localized (or backwards). In addition, by only adjusting the delay time of the signal after this addition, the other viewers 8-1 or 8-2 can be processed by other viewers without using FIR filters 11 and 12 for processing. 8-1 or viewer 8-2,
The sound can be localized on the left and right sides (or the back). Also, in combination with the main signal, it is possible to reproduce the sound more realistically.

In the above embodiment, when the surround signal is used as the sound signal, when the sound is reproduced from the speaker arranged in front of the viewer, the sound is adjusted to be heard from the side or the rear of the viewer. Although the amplitude and the delay time are adjusted by the means, the present invention is not limited to this, and when a general recorded sound signal or the like is used as the sound signal and reproduced by the speaker, the sound is arranged in the speaker. The amplitude and the delay time may be adjusted by the adjusting means so that the sound can be heard from a place other than the place, and the sound may be heard from any position regardless of the place where the speaker is arranged.

In the above embodiment, the main signal ML (t)
2, MR (t) 3 and the sound reproduction signal of the amplitude and delay time of the surround signal are respectively added to adders 26, 2
However, instead of this, the main signals ML (t) 2 and MR (t) 3 may be reproduced by different speakers.

In the above embodiment, the number of adjusting means is two. However, the number of adjusting means is not limited to this, and the sound signal may be divided into, for example, three or more and processed by three or more adjusting means. Three
Of course, the reproduction may be performed using three or more speakers.

FIG. 4 is a block diagram of a sound field signal reproducing apparatus according to the second embodiment of the present invention. That is, the difference from the embodiment in FIG. 1 is that between the adders 15 and 16 and the D / A converters 24 and 25, a delay device 17, which delays each of the three divided signals with a time difference, 19-1,19,20-1,1
8,20-2,20,19-2 and adders 22,23 for adding these signals at an arbitrary ratio are provided.

Next, the operation of this embodiment will be described with reference to FIG.

First, the surround signal S (t) produced in the same manner as in the first embodiment is input to the A / D converter 21, converted into a digital signal S (n), and branched into two. Input to FIR filters 11 and 12 having impulse responses hL (n) and hR (n) for localizing the sound to the left side or the rear left side of the viewer 8, respectively. The signals processed by the FIR filters 11 and 12 are respectively branched into two, one of which is directly input to the adders 15 and 16, and the other of which is input to the delay devices 13 and 14, respectively, and is delayed by τ1. Are added to the other adders 16 and 15 to be added. Up to this point, the operation is the same as in the first embodiment. That is, the sound is localized laterally (or backward) to the viewer 8 by outputting the output signals SL (n) and SR (n) from the adders 15 and 16 from the speakers 4 and 6. You can

Next, the signal SL output from the adders 15 and 16
(n) and SR (n) are respectively branched into three signals, which are respectively input to the delay units 17,19,20-1,19-1,18,20,19-2,20-2 and τ2 respectively. + τ3, τ4, τ5, τ3, τ4, τ2 + τ5 is delayed.

These delayed signals SL (n-τ2-τ3)
And the signal SR (n-τ3) are output from the speakers 4 and 6, respectively, the sound is localized laterally (or backward) to the second viewer 8-1 and the signal SL (n -τ5) and the signal SR (n-τ2-τ5) are output from the speakers 4 and 6, respectively, so that the sound is localized laterally (or backward) to the third viewer 8-2, Also, the signal SL (n-τ4)
And the signal SR (n-τ4) are output from the speakers 4 and 6, respectively, so that the sound is localized laterally (or rearward) to the viewer 8.

Here, the larger the distance between the viewers 8-1 and 8-2 and the viewer 8 is, the larger τ2 should be set. However, the value of τ2 is usually about 1 msec or less. Also τ3, τ4, τ5
By adjusting the value of, the optimum sound for each of the viewers 8, 8-1, 8-2 (the sound localized to the left or right side (or rear) of each viewer) is separated. You can Normally, τ4 is smaller than τ3 and τ5 by about 15msec or more, and it is desirable that τ3 and τ5 have a difference of about 20msec.

Signals SL (n-τ2-τ3), SL (n-τ4), SL (n-τ
5) is an adder 22 for signals SR (n-τ3), SR (n-τ4), SR (n-
τ2-τ5) is added by the adder 23 at an arbitrary ratio. For example, if the signals SL (n-τ4) and SR (n-τ4) are added at a rate higher than that of the other signals, it is possible to reduce the sound deterioration to the viewer 8. That is, the signal localized to the left side or the right side of the viewer 8 is actually the second signal.
For the viewer 8-1 and the third viewer 8-2, the sound is localized to the front, and similarly, for the second and third viewers, the sound localized to the left side or the right side is the viewer 8-1. This is because the sound is localized to the front. This can be avoided by adjusting the delay times of the delay devices 19, 19-1, 19-2, 20, 20-1, 20-2 as described above.

The outputs from the adders 22 and 23 are input to D / A converters 24 and 25, respectively, and are converted from digital signals to analog signals. The output signal of the D / A converter 24 and the main signal ML (t) 2 are added by the adder 26 and output as a sound from the speaker 4, and the D / A converter
The output signal of the master 25 and the main signal MR (t) 3 are added by the adder 27 and output from the speaker 6 as a sound. As a result, as in the first embodiment, the main signal is reproduced as a sound from the front as usual, and the surround signals are used for the respective viewers 8, the second viewer 8-1, and the third viewer 8-2. On the other hand, the sound is reproduced from the left side (or the rear side) and the right side (or the rear side), and the same effect as that of the first embodiment can be obtained.

In this way, the processing is performed so that the sound is localized to the side or rear of the left and right sides of one viewer 8 2
Different viewers using only one FIR filter 11, 12
-1,8-2 Adds with a delay to the output from the FIR filters 11 and 12 without using the FIR filters 11 and 12 that process so that the sound is localized to the left or right of the left or right. By doing so, it is possible to reproduce so that the surround sound is localized to the side or rear of the plurality of viewers 8, 8-1, 8-2. Further, by adopting such a configuration, the number of FIR filters need only be two,
With a simple structure, it is possible to reproduce sound in a wide service area.

In the above embodiment, the signals SL (n), SR
(n) is branched into three, but not limited to this, the signals SL (n) and SR (n) are branched into four or more, and a delay device is provided in each of them, and the delay of those delay devices is delayed. The time may be adjusted to optimize the sound for four or more viewers.

In the above embodiment, two speakers are arranged in the front, but two or more speakers may be arranged in the front so that sounds can be heard as sounds from the side or the rear. ..

[0053]

As is apparent from the above description, the present invention has an advantage that the sound to be reproduced can be heard as a sound from a place other than the reproduction place of the sound reproduction means.

Further, when the sound signal is a surround signal, there is an advantage that it can be heard as a sound from the side or the rear even if there is no sound reproducing means on the side or the rear.

[Brief description of drawings]

FIG. 1 is a block diagram of a sound field signal reproducing device according to a first embodiment of the present invention.

FIG. 2 is a diagram illustrating a method of localizing sound laterally or rearward by a speaker arranged in the front of the embodiment.

FIG. 3 is a diagram illustrating an FIR filter used in the same embodiment.

FIG. 4 is a block diagram of a sound field signal reproducing device according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a conventional sound field signal reproducing device.

[Explanation of symbols]

1 Surround Signal Creation Circuit 2 Main Signal ML (t) 3 Main Signal MR (t) 4 Speaker (Lch) 5 Speaker (Center) 6 Speaker (Rch) 7 Adder 8 Viewer 8-1 Second Viewer 8- 2 Third viewer 9, 10, 26 Speaker 11, 12 FIR filter 13, 14, 17, 18, 19, 19-1, 19-2,
20, 20-1, 20-2 Delay device 15, 16, 22, 23, 26, 27 Adder 21 A / D converter 24, 25 D / A converter

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akihisa Kawamura 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. Input means for inputting one sound signal, dividing means for dividing the input sound signal into at least two sound signals, and at least two adjusting means for respectively inputting the divided sound signals. And at least two sound reproducing means that are connected to the respective adjusting means and reproduce the transmitted sound reproducing signals into sounds at predetermined locations. The adjusting means provides the listener with the predetermined sound. A sound field signal reproducing apparatus characterized in that the amplitude and the delay time of the divided sound signals are respectively adjusted so as to be heard as a sound from a place other than a place, and the sound signals are output as the sound reproduction signal. 2. One of the sound signals is a surround signal of a sound that should come from the side or the back of the listener, such as a reverberant sound or a reflected sound created by the surround signal creating means. 1. The sound field signal reproducing device according to 1. 3. The sound field signal reproducing apparatus according to claim 1, wherein the sound reproducing means has a signal adding means for adding a sound signal different from the sound signal to the sound reproducing signal. 4. Further, for each of the sound reproduction signals, at least two delay means for delaying a part of the sound reproduction signal by a predetermined time, and the delayed part of the sound reproduction signal are respectively replaced by the other sound reproduction signals. 2. At least two adding means for adding to the reproduction signal at a predetermined ratio.
The sound field signal reproducing device according to 2 or 3. 5. The output signal of the adding means is delayed by a predetermined time different for each output signal so that one of the plurality of listeners can hear it as a sound from the side or the rear. The sound field signal reproducing apparatus according to claim 4, further comprising at least two signal delaying means. 6. The signal delay means divides the output signal of the addition means into a plurality of signals so that the plurality of listeners can hear the sounds from the side or the rear simultaneously.
6. The signals are delayed for different times, and the delayed signals are added at a predetermined ratio.
The sound field signal reproducing device described.