JPH02296498A - Stereophonic reproducing device and television set incorporating stereophonic deproducing device - Google Patents

Abstract

PURPOSE:To obtain a stereoscopic sense rich in the broad listening area by providing a speaker reproducing a left/right/center signal outputted from a stereoscopic acoustic reproducing device to the left/right and the center lower or center upper of a cathode ray tube reproducing a video image. CONSTITUTION:A center signal addition means 33 adds two kinds of signals reproduced from a center speaker, that is, a signal reproduced by a center speaker 53 and processed at an L-channel imaginary sound source control means 21 to realize an L-channel imaginary speaker 61 reproducing an L-channel signal and a signal reproduced by the center speaker 53 and processed at an R-channel imaginary sound source control means 22 to realize an R-channel imaginary speaker 62 reproducing an R-channel signal. A center signal output means 43 outputs a center signal externally. Thus, even when the location is slightly deviated from the position set initially, the imaginary sound source is sensed by a listener and the stereophonic acoustic reproducing device with a wide listening area able to sense a stereoscopic sense is realized.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a stereophonic sound reproducing device and a built-in stereophonic sound reproducing device that realize stereophonic sound reproduction of audio by creating a virtual sound source of a speaker that reproduces a plurality of input signals. BACKGROUND OF THE INVENTION 2. Description of the Related Art Related to Television Sets In recent years, efforts have been made to improve the sound quality of audio reproduction and to provide stereoscopic reproduction through signal processing. For example, by controlling the signals input to the left and right speakers, a phenomenon is created in which sound can be heard even from places where there are no speakers, thereby creating a three-dimensional sound field in which sounds arrive from all directions.

An example of the conventional three-dimensional sound reproduction device mentioned above will be described below with reference to the drawings.

FIG. 2 shows a conventional three-dimensional sound reproduction device.

In FIG. 2, 11.12 is the input terminal for the LchRch signal, and 21.22 is the Lch, Lch imaginary sound that performs signal processing to create virtual speakers 61.62 by being reproduced by the left and right real speakers 51.52. Imaginary sound source control means 1 1.32 is a signal addition means for adding the outputs of the Lch and Rch virtual sound source control means, 41.42 is a signal addition means 313
This signal output means outputs the second signal. Also 5101
．． 5102 is from the Lch speaker 51 to the listener's left and right ears 71. , 72, which is HLL+H
It will be described in LM, and from now on, Rch speaker 5
Hat HIR from 2 is 52015202 I from center speaker 53 (ct14CR is 5301.5
302, G, L, GL from the imaginary Lch speaker 61,
is 6101,6]02, G from imaginary Rch speaker 62
R,,G,, is 62016202, imaginary rear speaker 63
RLLRll from 1 is 63116312. RILL from imaginary rear speaker 632, R11116321,6
It is shown as 322 in the drawing. In order to use the Lch and Rch speakers 51 and 52 to achieve an effect as if the signal S input to the Lch is being reproduced by the virtual speaker 61, the Lch virtual sound source control means 21 adds El to the input signal. , L by processing the transfer characteristics to obtain Lc'
The signal is output to the adder 31 of h, and further subjected to transfer characteristic processing called ELR, and is output to the adder 32 of Rch. At this time, the signals PR,,P at the listener's left and right ears 7172
R, is P R = S * ELlj + (LL + S *
Et Shit * Hit... (1) P RR= S * ELL'l' HLR+ S *
gLll* Him... (2). Also, when the signal S is reproduced by the virtual speaker 61, the signals PIL and P at the left and right ears 11 and 12 of the listener are
I is PIL=S*GLL...
(3) PIR=S*GLR (4).

The signals PRLRIL at the listener's left ear 71 are equal;
Signals PR,, P1 ., at the right ear 72 of the listener. If they are equal, even if the LchRch speaker is used for reproduction, the same effect as when reproduced by the virtual speaker can be obtained. Therefore, from the above equation, ELl and lELII are determined as (5). The Lch imaginary sound source control means 21 is ELL+ELL expressed by the above formula.
j. In the present application, unless otherwise specified, the explanation will be given assuming that in order to realize a virtual sound source using two speakers, there is a virtual sound source control means that performs the same processing as described above.

Problems to be Solved by the Invention However, in the above three-dimensional sound reproduction device, it is required to strictly fix the relationship between the left and right speakers and the listening position.
If the listening position shifts, the transfer function to be used for setting will be different, making it impossible to create a virtual speaker. Therefore, there was a problem in that it was not possible to realize the effect of stereophonic sound using virtual speakers.

In view of the above-mentioned problems, the present invention provides stereophonic sound with a wide listening area that allows the listener to feel a false sound source even if the positional relationship is slightly shifted from the initially set positional relationship, and therefore allows the listener to perceive a three-dimensional effect. The present invention provides a playback device.

Means for Solving the Problems In order to solve the above problems, the stereophonic sound reproducing apparatus of the present invention includes left and right signal input means into which left and right audio signals are input, and at least one of the input signals. In order to localize the sound image of the two signals to a position other than the speaker used for reproduction, the input signal is processed and at least two types of signals are created to be reproduced by the left and center speakers, or the right and center speakers. One virtual sound source control means and a plurality of signals input from the signal input means or signals output from the virtual sound source side J'JII means are added and reproduced by the left, right or center speaker. at least one signal addition means for outputting as an exponent signal, and three signal outputs for outputting the signal output from the signal input means, the virtual sound source control means, or the signal addition means as signals to be reproduced by three left, right and center speakers. It is equipped with means.

According to the above-described configuration, the present invention uses the left and center speakers or the right and center speakers to realize a virtual speaker necessary for stereophonic sound reproduction. Even in the case of misalignment, it is possible to realize a virtual speaker, and therefore it is possible to realize a stereophonic sound reproducing device with a wide listening area that can provide a three-dimensional effect.

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

(Example 1) The purpose of this example is to enable the listener to determine the false sound source even when the positional relationship is slightly deviated from the initially set positional relationship.
Therefore, it is an object of the present invention to provide a stereophonic sound reproduction device with a wide listening area that can provide a stereoscopic effect.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a stereophonic sound reproducing apparatus according to an embodiment of the present invention. In FIG. 1, 33 is processed by the Lch virtual sound source il + control means 21 and reproduced by the center beaker 53 in order to realize the Lch virtual speaker 61 that reproduces the two types of signals reproduced by the center speaker, that is, the Lch signal. signal and R
A center signal adding means 43 adds the signal processed by the Rch virtual sound source control means 22 and reproduced by the sunter speaker 53 in order to realize the Rch virtual speaker 62 that reproduces the channel signal; This is center signal output means for outputting.

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below with reference to FIGS. 1 and 3.

In FIG. 1, the Lch imaginary sound source control means is the listener's both ears 7
1.72, Lch speaker 51 and center speaker 53
Using the positional relationship as the initial value, Lc
The left and center speakers 51.
The Lch signal input means 11 processes the signal reproduced at 53 and outputs the Lch signal inputted thereto. Similarly, the Rch is also processed to realize the Rch virtual speaker 62.

Lch, Rch imaginary speaker 61.6
2, a wider and more expansive three-dimensional sound reproduction is realized. At this time, a case where the listening position is slightly shifted to either the left or right will be explained using FIG. Figure 3 (al
3(b) shows a conventional state in which a salt speaker is realized using the right and center speakers, and FIG. 3(b) shows a conventional state in which a salt speaker is realized using the left and right speakers. In the conventional case, when the listening position shifts slightly, the transmission characteristics from the left or right speaker to both ears of the listener change. On the other hand, in Himuro's case, even if the listening point shifts, the transfer function from the center speaker to the listener does not change due to the nature of the listener facing in one direction towards the center, so there is no change between the two transfer functions. The degree of this will be relaxed compared to before. Furthermore, when we look at the change in distance from the listening point to the speaker, it is clear that the degree of change is greater in the conventional case than in the Himuro case, and the difference in distance can also be regarded as a type of transfer function, and in this respect, It can be said that the range in which salt speakers can be realized when the listening position is slightly shifted is wider than in the past.

As described above, in order to localize the sound image of at least one of the input signals to a position other than the speaker used for reproduction, the input signal is processed and the sound image of at least one of the input signals is localized to a position other than the speakers used for reproduction. At least one virtual sound source control means that creates two types of signals to be reproduced by the speaker, and the signal output from the virtual sound source control means are added together, and the left
A signal adding means outputs a signal to be reproduced by the right or center speaker, and a signal output from the signal input means, the virtual sound source control means, or the signal addition means is reproduced by the left, right, and center speakers. By providing three signal output means for outputting signals as signals, the listener can perceive the false sound source even if the positional relationship is slightly shifted from the initially set positional relationship, and therefore the listener can perceive a three-dimensional effect. This makes it possible to realize a stereophonic sound reproducing device with a wide listening area.

(Embodiment 2) If the listening position deviates significantly from the initial setting, it becomes difficult to create an imaginary sound source even in the ice room as shown in Embodiment 1. At this time, the Lch processed signal is reproduced by the Lch real speaker 51 and the center speaker 53, so the Lch
The sound image position of the channel becomes unstable and the stereoscopic reproduction deteriorates significantly. The purpose of this embodiment is to provide at least the same three-dimensional effect as before creating the virtual sound source when the listening position deviates significantly from the initial positional relationship and the listener cannot perceive the virtual sound source. The present invention provides a three-dimensional sound reproduction device obtained by the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows a stereophonic sound reproducing apparatus according to an embodiment of the present invention. In FIG. 4, 110.120 transmits the signal inputted by the signal input means 11.12 to the virtual sound source control means 21.22, Lch, Rch.
This is signal distribution means for distributing to channel signal addition means 31 and 32.

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below.

In FIG. 4, Lch signal distribution means 110 distributes the input Lch signal to virtual sound source control means 21 and signal addition means 31 without processing it. The signal sent to the virtual sound source control means 21 is processed to create a salt speaker 61. On the other hand, since the signal sent to the signal addition means 31 is reproduced by the real speaker 51 without creating a salt speaker, as a result, a sound image is placed between the real speaker 51 and the salt speaker 61 at a position corresponding to their respective amplitude distribution ratios. is made. In contrast to the processed signal whose sound image position is unstable when the listening position is greatly shifted, the unprocessed signal is reproduced from the 1,...ch speaker 51 and the sound image is stable.

As described above, by providing the signal distribution means that distributes the signal input by the signal input means to the virtual sound source control means and the signal addition means at a constant amplitude ratio, the listening position can be adjusted with respect to the initially set positional relationship. To realize a stereophonic sound reproducing device that can provide at least the same level of stereoscopic effect as before creating a virtual sound source even when a listener cannot be confused by the virtual sound source due to a large deviation.

(Example 3) When an imaginary sound source is created by controlling a high frequency signal, its sound wave length is short, and therefore it is subject to large changes due to differences in location, resulting in poor localization of the imaginary sound source and as described in Example 2. As the signal is being played back from the center speaker, the localization becomes unstable. In addition, for bass, there is no big difference between the transfer function from the center speaker and the transfer function from the left and right speakers, so precision signal processing is required to control it, and improving precision requires an upper limit on cost. It has the problem of being stored away.

The purpose of this embodiment is to prevent the sense of localization of high-pitched sounds from becoming unstable even when the listening point is shifted, and to provide a three-dimensional sound reproduction device that does not require much control precision by not performing imaginary sound source control for low-pitched sounds with poor sense of localization. It provides:

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 5 shows a three-dimensional sound reproducing apparatus according to an embodiment of the third aspect of the present invention. In FIG. 5, reference numeral 111.121 divides the signal inputted by the signal input means 11.12 into two signals having frequency bands that do not overlap with each other, and divides the signal inputted by the signal input means 11.12 into two signals having frequency bands that do not overlap with each other. 32 is a band dividing means.

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below.

In FIG. 5, the Lch signal distribution means 111 divides the input Lch signal into two signals of non-overlapping frequency bands as shown in FIG. Enter. The medium tone signal sent to the virtual sound source control means 21 is processed to create a salt speaker 61. On the other hand, the low tone and high temperature signals sent to the signal addition means 31 are reproduced by the real speaker 51 without creating a salt speaker. As a result, high-pitched and low-pitched sound images are created at the position of the actual speaker 51, and a mid-range sound image is created at the salt speaker 61 position, but the sense of localization for each of the low and high-pitched sounds is ambiguous compared to that of the mid-range sounds, so the sound image of the mid-range sounds is created. You can hear the sound image moving to different positions. Even when the listening position shifts significantly, the position r of the midrange sound image remains relatively stable, so the effect of stereoscopic reproduction is not lost.

As described above, by providing the band dividing means that divides the signal inputted by the signal input means into frequency bands and applies signals of different bands to each of the virtual sound source control means and the signal addition means, the listening point can be shifted. A three-dimensional sound reproducing apparatus is realized in which the sense of localization of high-pitched sounds does not sometimes become unstable, and the virtual sound source control of low-pitched sounds with poor sense of localization is not performed, so that control precision is not required so much.

(Example 4) When creating a sound image at the center using left and right speakers, there are drawbacks such as an ambiguous sound image or a large sound image. Therefore, when creating a sound image at the center, the signal from the center is It can be played (taken place).

The actual purpose of the present invention is to provide a three-dimensional sound reproduction device that can reproduce a signal that localizes a sound image to the center using center speakers that realize left and right speakers.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 7 shows a stereophonic sound reproducing apparatus according to an embodiment of the present invention as claimed in claim 4. In FIG. 7, 13 is a center signal input means.

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below.

In FIG. 7, the signal input by the center signal input means 13 is input to the center signal addition means 33 without being processed, and is reproduced by the center speaker 53 to create left and right virtual speakers. .2
It is added to the output signal of 2.

The signal output from the addition means 33 is output from the center signal output means 53 and reproduced by the center speaker.

A sound image of the signal input from the center signal input means 13 is created at the center.

As described above, by providing the center signal addition means for adding the signal inputted by the center signal input means 13 with the output of the virtual sound source control means 21 and 22, the sound image is centered on the center speaker that realizes left and right virtual speakers. A stereophonic sound reproducing device capable of reproducing signals for localizing is realized.

(Embodiment 5) In a stereophonic sound reproducing device, it is desirable to not only reproduce a signal that can be heard from the front, but also to reproduce a signal called a surround signal that makes a sound image felt to the side or rear. However, as the number of signals increases, as many speakers as there are in the direction of the sound source are required.
．． By creating a virtual sound source in 52, the effect of sound arriving from a direction where there is no speaker was obtained. However, as described in Example 1, if there is a slight deviation from the initially set positional relationship, a virtual sound source that reproduces the surround signal will not be created, so not only will three-dimensional sound reproduction not be realized, but the surround signal will be There is a problem in that three-dimensional sound reproduction is impaired because the Lch, Rch, and center signals are reproduced simultaneously by the front speakers.

The purpose of this embodiment is to create a listening area in which the listener can feel the virtual sound source that reproduces the surround signal even if there is a slight deviation from the initially set positional relationship, and therefore can perceive a three-dimensional effect. This provides a wide three-dimensional sound reproduction device.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIGS. 8 and 9 show a three-dimensional sound reproducing apparatus according to an embodiment of the present invention.

In FIGS. 8 and 9, 14 is a surround signal input means, 241 and 242 are surround virtual sound source control means, and 63
1.632 is a surround virtual speaker.

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below.

In FIG. 8.9, the signal input by the surround signal input means 14 is processed into a signal that creates a virtual speaker using the left or right speaker 51, 52 and the center speaker 53, so the surround virtual sound source control means 241, 242
The two output signals are input to the Lch and Rch signal addition means 3132 and the center signal addition means 33. The signals output from the addition means 31.32.33 are output from the signal output means 51.52.53. and is reproduced by the Lch and Rch speakers 51 and 52 and the center speaker 53. Imaginary speakers 631 and 632 of the signals input from the surround signal input means 14 are created.

FIG. 1O shows an embodiment of the stereophonic sound reproducing apparatus of the present invention, in which at least one virtual sound source control means is a signal means for creating a virtual speaker using left and right speakers, and the opening angle of the left and right speakers is The difference in the transfer function between both ears is larger than when using the center and left or right speakers, so it is possible to create a clear virtual sound image at the initially set location, giving a more three-dimensional effect. Certain sound reproduction becomes possible.

FIG. 11 shows an embodiment of the three-dimensional sound reproduction device of the present invention, in which the signal input to the virtual sound source control means 242 passes through the signal delay means 2420, and the sound reproduction with a more three-dimensional effect is achieved. It becomes possible.

As described above, by providing the virtual sound source control means 241, 242 that creates the virtual speakers 631, 632 of the signal input by the surround signal input means 13 using the center beaker 53 and the left or right speaker 51, 52, the initial To provide a stereophonic sound reproducing device with a wide listening area, which can confuse a listener with a false sound source that reproduces a surround signal even if the positional relationship is slightly shifted from the set positional relationship, and can therefore perceive a three-dimensional effect. This is what we provide.

(Embodiment 6) If the listening position deviates significantly from the initial setting, it becomes difficult to create a virtual surround speaker as shown in Embodiment 5 even if it is a real speaker. It is desirable that the surround signals come from all directions, and a surround effect can be obtained by hearing even one surround signal from the rear five sides. The purpose of this embodiment is to provide a stereophonic sound reproducing device with a wide listening area, which allows a listener to listen to at least one ring speaker at a plurality of listening positions, thereby providing a stereoscopic effect with a surround effect. It is something.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 12 shows a stereophonic sound reproducing apparatus according to an embodiment of the present invention as claimed in claim 8. In FIG. 11, 710 and 720 are the left and right ears of the listener when the listening position is shifted from the listening position shown by the solid line, and 632 is the left and right ears 710 and 720 at the listening position shown by the broken line. This is a surround virtual speaker created by the center and right speakers 53 and 52 using the transfer function of .

The operation of the stereophonic sound reproducing apparatus configured as described above will be described below.

In FIG. 12, the surround signal is input to an imaginary sound source control means 241 which is set to be heard at the solid line position and to an imaginary sound source control means 242 which is set to be set to be heard at the broken line position, and is input to the center speaker 53 and the right or left respectively. A signal is created which is played on the loudspeakers 52,51. The listener can feel either the ring speaker 631 or 632 created by these signals at either the listening position shown by the solid line or the broken line.

As described above, by providing a plurality of virtual sound source control means for creating a plurality of virtual sound sources of the surround speakers, and setting the virtual sound source control means assuming different listening points, the listener feels A three-dimensional sound reproduction device with a wide listening area that can provide a three-dimensional sound with a surround effect is realized.

(Embodiment 7) In recent years, the audio signals of television broadcasts or video software have been converted to stereo, and built-in speakers in television sets are installed on both the left and right sides of the cathode ray tube to support three-dimensional playback by converting the audio into stereo. Video and audio are played at the same time, creating stereo-like audio that recreates powerful scene effects.

However, the width of the cathode ray tube is generally not very wide when viewed from the listening position, and therefore the opening angle of the left and right speakers is also small, resulting in a problem that the left and right stereo effect is poor. Furthermore, 4-channel reproduction of left and right center and surround came to be performed, and in addition to the left and right speakers, a center speaker was installed below or above the cathode ray tube. However, since surround speakers cannot be built into a television, there are problems in that it is necessary to install the speakers and adjust the volume balance.

The purpose of this embodiment is to provide a television set with a built-in stereophonic sound reproduction device that can provide a rich and expansive stereoscopic effect using left, right, and center speakers installed at narrow intervals across a cathode ray tube. It is.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A three-dimensional sound reproducing apparatus according to an embodiment of the present invention will be described below with reference to the drawings. Figure 13 (A), (B)
1 shows the appearance of a television set with a built-in stereophonic sound reproduction device according to an embodiment of the present invention. In Figure 13,
8 is a cathode ray tube, and 9 is a cabinet.

The operation of the TV station with a built-in stereophonic sound reproduction device configured as described above will be described below.

In FIG. 13, the television set is the claim (11) of the present invention.
The three-dimensional sound reproduction device described in (8) to (8) is built in, and the left, right, and center output signals are reproduced by the built-in left, right, and center speakers 51°, 52, and 53. Therefore, it is possible to set the virtual speakers 61, 62 of the left and right real speakers 51, 52 wider than the spacing between the cathode ray tubes, and to create surround virtual speakers.

Effects of the Invention As described above, by providing a stereophonic sound reproducing device and speakers for reproducing left, right, and center signals output from the stereophonic sound reproducing device on the left and right sides and at the bottom or top of the center of the cathode ray tube that reproduces images, the sound can be expanded. A TV set with a built-in stereophonic sound reproduction device that can provide a rich three-dimensional effect has been realized.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a three-dimensional sound reproduction device of the present invention,
Fig. 2 is a block diagram showing a conventional three-dimensional sound reproduction device, Fig. 3 is a conceptual diagram of Kimoto and the conventional system showing the state when the listening position deviates from the set position, and Fig. 4 is a three-dimensional sound reproduction device of the present invention. FIG. 5 is a block diagram showing the stereophonic sound reproducing device of the present invention, FIG. 6 is a frequency characteristic diagram showing an example of band dividing means, and FIG. 7 is the stereophonic sound reproducing device of the present invention. 8 and 9 are block diagrams showing the stereophonic sound reproducing apparatus of the present invention, Fig. 10 is a block diagram showing the stereophonic sound reproducing apparatus of the present invention, and Fig. 11 is a block diagram showing the stereophonic sound reproducing apparatus of the present invention. FIG. 12 is a block diagram showing the playback device; FIG. 12 is a block diagram showing the stereophonic sound playback device of the present invention; FIG.
Figures (A) and (B) are external views of a TV station with a built-in stereophonic sound reproduction device according to the present invention. 11.12, 13.14... Lch, Rch center 5 surround signal input means, 110°12 (1
・=・Lch, Rch signal distribution means, 111121-
Lch, Rch band dividing means, 2122 241 24
2--Lch Rch surround virtual sound source control means, 2420...Delay means, 31 32 33-
-Lch, Rch, center signal addition means, 41,
42.43...LchRch, center signal output means, 51.5253...Lch, Rch,
Center real speaker 6 1, 62. 63 1.
632-Lch, Rch. Surround virtual speaker, 71.72...both ears at listening point, 8...CRT, 9...
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Claims (9)

[Claims] (1) Left and right signal input means into which left and right audio signals are input; at least one virtual sound source control means for processing the signal input to the left and center speakers or for producing two types of signals to be reproduced by the right and center speakers; and a signal input from the signal input means or the virtual sound source control means. at least one signal adding means for adding a plurality of signals outputted from the signal generator and outputting the resultant signal as a signal to be reproduced by a left, right or center speaker; 1. A stereophonic sound reproducing device comprising: three signal output means for outputting a signal to be reproduced by three left, right, and center speakers. (2) The apparatus according to claim (1), further comprising at least one signal distribution means for distributing the signal inputted by the signal input means to each of the virtual sound source control means and the signal addition means at a constant amplitude ratio. Three-dimensional sound reproduction device. (3) A claim characterized by comprising at least one band dividing means that divides the signal input by the signal input means into frequency bands and applies signals in different bands to each of the virtual sound source control means and the signal addition means. The stereophonic sound reproduction device according to item (1). (4) A center signal input means is provided for inputting a signal to be reproduced by the center speaker, and the signal inputted by the center input means is inputted to a plurality of signals to be reproduced by the center speaker to the center signal addition means. The stereophonic sound reproduction device according to claim (1). (5) surround signal input means for inputting signals to be reproduced by surround speakers; at least one virtual sound source control means for creating a virtual sound source of the surround speakers using a center speaker and either left or right speaker; The signal input from the signal input means or the signal output from the imaginary sound source control means described in claim (1) of the present patent is added and reproduced by the left, right, or center speaker. at least one signal addition means for outputting as a signal; a signal input means;
A three-dimensional sound reproduction device comprising three signal output means for outputting a signal output from a virtual sound source control means or a signal addition means as signals to be reproduced by three left, right and center speakers. (6) The three-dimensional sound reproducing apparatus according to claim (5), further comprising at least one virtual sound source control means for creating a virtual sound source using right and left speakers. (7) Claim (5) characterized in that: at least one delay means delays the signal inputted by the surround signal input means; and the output of the delay means is inputted to the virtual sound source control means.
) The stereophonic sound reproducing device described in (8) A plurality of virtual sound source control means are provided for creating a plurality of virtual sound sources of surround speakers, and at least one virtual sound source control means is set assuming a different listening point from the other virtual sound source control means. The stereophonic sound reproducing device according to claim 5, characterized in that: (9) A stereophonic sound reproducing device according to any one of claims (1) to (8), and a speaker for reproducing left and right signals output from the stereophonic sound reproducing device to the left of a cathode ray tube for video reproduction. and a TV socket with a built-in stereophonic sound reproducing device, characterized in that a speaker for reproducing a center signal output from the stereophonic sound reproducing device is provided below the center of the cathode ray tube, above the center, or both. .