阅读说明：本技术 显示装置、控制方法和程序 (Display device, control method, and program ) 是由 山冈大祐 于 2020-03-27 设计创作，主要内容包括：一种显示装置,设置有：控制单元,该控制单元从显示在显示单元上的图像识别声源位置,并且根据声源位置对语音信号执行各种不同类型的信号处理,该语音信号与图像同步并且输出到多组扬声器单元,该多组扬声器单元包括设置在显示单元的上部上的至少一组扬声器单元。(A display device is provided with: a control unit recognizing a sound source position from the image displayed on the display unit, and performing various different types of signal processing on a voice signal in accordance with the sound source position, the voice signal being synchronized with the image and output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.)

1. A display device, comprising: a control unit that specifies a sound source position from an image displayed on a display unit and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

2. The display device according to claim 1, wherein the control unit performs the signal processing in accordance with a relative positional relationship of each speaker unit with respect to the sound source position.

3. The display device according to claim 2, wherein the control unit performs the signal processing in consideration of at least a function or an environment of each of the speaker units.

4. The display device according to claim 1, wherein the control unit

Sound image localization processing corresponding to the sound source position is performed by performing at least one of correction of a frequency band, adjustment of sound pressure, and delay processing of reproduction timing on the voice signal.

5. The display device according to claim 1, wherein the control unit:

performing signal processing for enhancing a high-frequency sound range component of the voice signal as the speaker unit comes closer to the sound source position.

6. The display device according to claim 1, wherein the control unit:

signal processing for increasing the sound pressure of the voice signal as the speaker unit comes closer to the sound source position is performed.

7. The display device according to claim 1, wherein the control unit:

increasing a delay amount of reproduction timing of the voice signal as the speaker unit moves away from the sound source position.

8. The display device according to claim 1, wherein the display device comprises:

and a plurality of sets of two speakers as a plurality of sets of speakers for reproducing the voice signals of the two channels of the left channel and the right channel.

9. The display device according to claim 8, wherein the plurality of sets of speakers include a plurality of top speakers provided on an upper end of a rear surface of the display unit and a plurality of bottom speakers provided on a lower end of the rear surface of the display unit.

10. The display device according to claim 8,

the display unit is a flat display panel;

the speaker is a vibration unit that vibrates the display panel to output voice,

the plurality of sets of speakers include a plurality of the vibration units disposed on an upper portion of a rear surface of the display panel and a plurality of the vibration units disposed on a lower portion of the rear surface of the display panel, and

the display device further includes the vibration unit disposed at a center of the rear surface of the display panel.

11. A control method performed by a processor comprising a control unit that:

a sound source position is specified from an image displayed on a display unit, and different types of signal processing are performed on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

12. A program that causes a computer to function as:

a control unit that specifies a sound source position from an image displayed on a display unit, and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

Technical Field

The present disclosure relates to a display device, a control method, and a program.

Background

In recent years, a display device such as a television receiver or a personal computer includes a display having a display surface on which an image is displayed, and a speaker or the like is arranged on a rear side of the display and covered from the rear side by a rear cover. Such a display device has a configuration in which a speaker is disposed on the rear side of the lower end of a display, a slit serving as a passage hole for voice output from the speaker is disposed on the lower side of the display, and voice output from the speaker is directed forward from the slit through the lower side of the display.

Further, as disclosed in the following patent document 1, the thickness and weight of the display have been rapidly reduced, and a flat panel speaker including a flat panel and a plurality of vibrators disposed on a rear surface of the flat panel and vibrating the flat panel has also been proposed. The flat panel speaker allows a vibrator to generate vibration on a flat panel to output voice.

Documents of the prior art

Patent document

Patent document 1: WO 2018/123310A

Disclosure of Invention

Technical problem to be solved by the invention

However, in any conventional speaker-mounted display device, two speakers LR are provided only at the lower end or both ends of the rear surface of the display device, and thus it is difficult to make the position of an image and the position of sound sufficiently correspond to each other.

Solution to the problem

According to the present disclosure, there is provided a display device including: a control unit that specifies a sound source position from the image displayed on the display unit and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

According to the present disclosure, there is provided a control method performed by a processor including a control unit, including: a sound source position is specified from an image displayed on a display unit, and different types of signal processing are performed on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

According to the present disclosure, there is provided a program for causing a computer to function as a control unit that specifies a sound source position from an image displayed on a display unit and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units provided on an upper portion of the display unit.

Drawings

Fig. 1 is a diagram illustrating a configuration example of a display device according to an embodiment of the present disclosure.

Fig. 2 is a view showing an arrangement of speakers in a display device according to an embodiment of the present disclosure.

Fig. 3 is a view showing a configuration example of an appearance of a display device that emits sound waves in a front direction according to an embodiment of the present disclosure.

Fig. 4 is a diagram showing signal processing of a comparative example.

Fig. 5 is a diagram showing each process of a voice signal to be output to each speaker according to an embodiment of the present disclosure.

Fig. 6 is a view showing adjustment of the positional relationship between an image and a sound according to the first example.

Fig. 7 is a flowchart showing an example of the flow of the voice output process according to the first example.

Fig. 8 is a view showing adjustment of the positional relationship between an image and a sound according to the second example.

Fig. 9 is a diagram showing signal processing according to the second example.

Fig. 10 is a view showing a positional relationship between a display device according to a third example and a viewer.

Fig. 11 is a diagram illustrating signal processing according to a fourth example.

Detailed Description

Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. Note that in the present specification and the drawings, components having substantially the same functions are denoted by the same reference numerals, and repeated description of these components will be omitted.

The following description is made in order.

1. Configuration example of display device

2. Examples of the invention

2-1. first example

2-2. second example

2-3. third example

2-4 fourth example

3. Conclusion

Hereinafter, modes for implementing the display device according to the present disclosure will be described with reference to the accompanying drawings. Although the following will describe application of the present technology to a television receiver that displays an image on a display, the application range of the present technology is not limited to the television receiver, and the present technology can be widely applied to various display devices such as monitors for personal computers and the like.

Further, in the following description, front, rear, up, down, left, and right directions are indicated by directions in which the display surface of the display apparatus (television receiver) faces as the front side (front surface side).

<1. configuration example of display apparatus >

Fig. 1 is a diagram illustrating a configuration example of a display device according to an embodiment of the present disclosure. As shown in fig. 1, the display device 10 includes a control unit 110, a display unit 120, a voice output unit 130, a tuner 140, a communication unit 150, a remote control receiving unit 160, and a storage unit 170.

(display unit 120)

The display unit 120 displays images of the program contents, the Electronic Program Guide (EPG), and the data broadcasting contents selected and received by the tuner 140, and displays an on-screen display (OSD). The display unit 120 is realized by, for example, a Liquid Crystal Display (LCD), an organic Electroluminescence (EL) display, or the like. In addition, the display unit 120 may be implemented by a flat panel speaker. The flat panel speaker allows a plurality of vibrators disposed on a rear surface of a flat panel to generate vibrations on the flat panel to output voice, and is integrated with a display device displaying an image to output voice from a display surface. For example, the panel unit includes a thin plate display unit (a display unit as a vibration plate) that displays an image and an inner plate (a substrate that supports a vibrator) that is arranged to face the display unit with a gap interposed therebetween.

(Voice output unit 130)

The voice output unit 130 includes a sound generating element that reproduces a voice signal. As the voice output unit 130, the above-described flat panel speaker (diaphragm (display unit) and vibrator) may be used in addition to the cone speaker.

Further, the voice output unit 130 includes a plurality of sets of speaker units including at least one set disposed on the upper end side of the rear side of the display unit 120. The speaker unit refers to a speaker housing including at least one sound generating element reproducing a voice signal. For example, in the configuration example shown in fig. 1, the following configuration is formed: a speaker unit group (hereinafter, referred to as an upper speaker 131) provided on the upper end side of the rear side of the display unit 120 and a speaker unit group (hereinafter, referred to as a lower speaker 132) provided on the lower end side of the rear side of the display unit 120. Fig. 2 shows an example of the arrangement of speakers in the display device 10 according to the present embodiment. In the example shown in fig. 2, a plurality of sound generating elements (including cone-type speakers, for example) that emit sound waves are provided on the rear surface of the display unit 120-1.

Specifically, as shown in fig. 2, when the display unit 120-1 is viewed from the front, the upper speaker (speaker unit) 131L is disposed closer to the left side of the upper end side (top), and the upper speaker (speaker unit) 131R is disposed closer to the right side of the upper end side. In addition, the lower speaker (speaker unit) 132L is disposed closer to the left side of the lower end side (bottom), and the lower speaker (speaker unit) 132R is disposed closer to the right side of the lower end side.

Further, in more detail, a voice passing hole (not shown) is formed around the speaker unit, and the sound wave generated in the speaker unit is emitted to the outside of the display device 10 through the voice passing hole. The transmission direction of the sound waves in the display device 10 can be transmitted upward, downward, leftward, and rightward according to the position of the voice passing hole. For example, in the present embodiment, a voice passing hole is provided to emit a sound wave in the forward direction. Here, fig. 3 shows a configuration example of the appearance of the display device that emits sound waves in the forward direction according to the present embodiment. Note that the appearance configuration (the emission direction of sound waves or the structure around the voice passing hole) shown in fig. 3 is an example, and the present disclosure is not limited thereto.

As shown in fig. 3, in the display device 10, the upper speaker 131L is disposed closer to the left side of the upper side of the rear surface of the display unit 120-1, the upper speaker 131R is disposed closer to the right side of the upper side of the rear surface, the lower speaker 132L is disposed closer to the left side of the lower side of the rear surface, and the upper speaker 131R is disposed closer to the right side of the lower side of the rear surface. It is preferable to have a part of the upper speakers 131 located at the upper side of the display unit 120-1 (so that not all of the upper speakers 131 are located at the upper side of the display). In addition, it is preferable to have a part of the lower speakers 132 located at the lower side of the display unit 120-1 (so that not all of the lower speakers 132 are located at the lower side of the display unit 120-1). Since a part of the speaker unit is disposed to protrude from the display unit 120-1 and the sound wave is emitted to the outside in the forward direction, even when the sound having a high frequency is generated from the speaker, the sound can be output to the outside of the display device 10 without degrading the sound quality. In addition, since not all speaker units are located at the upper or lower side of the display unit 120-1, the size of the frame of the display device 10 can be further reduced.

The voice is output forward from each upper speaker 131. A slit 180 serving as a voice passing hole is provided in the upper frame of the display unit 120-1, and voice emitted from the upper speaker 131 is emitted to the outside of the display device 10 via the slit 180.

Similarly, speech is also output forward from each lower speaker 132. A slit 182 serving as a voice passing hole is provided in the lower frame of the display unit 120-1, and voice emitted from the upper speaker 131 is emitted to the outside of the display device 10 via the slit 182.

The sound waves of the respective voices output from the upper speaker 131 and the lower speaker 132 reach the viewer who views the display device 10 as direct waves, and also reach the viewer as reflected waves from a wall surface, a ceiling surface, or a floor surface.

In the present embodiment, by a configuration including a plurality of sets of speaker units having at least one set of speaker units provided on the upper end side, a voice signal output from each speaker unit is subjected to signal processing, and the position of an image and the position of a sound are made to sufficiently correspond to each other. Therefore, a feeling of unity between the image and the sound is provided, and a good viewing state can be achieved.

(control unit 110)

The control unit 110 functions as an arithmetic processing device and a control device, and controls the overall operation of the display device 10 according to various programs. The control unit 110 is realized by, for example, an electronic circuit such as a Central Processing Unit (CPU) or a microprocessor. In addition, the control unit 110 may include a Read Only Memory (ROM) that stores programs to be used, operating parameters, and the like, and a Random Access Memory (RAM) that temporarily stores parameters and the like that are appropriately changed.

Further, the control unit 110 also functions as a sound source position specifying unit 111 and a signal processing unit 112.

The sound source position specifying unit 111 analyzes the image displayed on the display unit 120 and specifies the position of the sound source. Specifically, the sound source position specifying unit 111 identifies each object included in the image (identifies images such as a person and an object), and identifies the movement of each identified object (for example, the movement of the mouth), the position (xy coordinates) of each object in the image, and the like, and specifies the sound source position. For example, when it is analyzed by image recognition that the mouth of a person is moving in a certain scene, the voice of the person is reproduced in synchronization with the scene, and the mouth (face position) of the person recognized in the image is a sound source position. According to the result of the image analysis, the sound source position may be the entire screen. Further, there is a case where the sound source position is not in the screen, but in this case, the outside of the screen may be specified as the sound source position.

The signal processing unit 112 has a function of processing a voice signal to be output to the voice output unit 130. Specifically, the signal processing unit 112 performs signal processing of positioning a sound image at the sound source position specified by the sound source position specifying unit 111. More specifically, pseudo sound source localization is realized by performing at least one of adjustment of a sound range, sound pressure, and delay for each voice signal to be output to each speaker of a plurality of sets of speaker units including at least one set of speaker units disposed on the upper end side of the rear side of the display unit 120. In general, when a person hears sounds emitted from a plurality of speakers, the direction of the sound, which is louder, has a high frequency, and arrives earlier at the human ear, is perceived as the direction of the sound source by the human ear to recognize the direction as one sound. Therefore, the signal processing unit 112 realizes pseudo sound source localization by processing the voice output from the speaker arranged closest to the sound source position in the image so that the voice is in a high-frequency sound range, increasing the volume (increasing the sound pressure), and reducing the delay (so that the voice reaches the ear of the viewer earlier than the voice from the other speakers) in accordance with the positional relationship between the sound source position in the image and the mounting position of each speaker.

When the sound source positions in the image have the same distance between the two speakers, the signal processing unit 112 processes the voices output from the two speakers so that the voices are in a high-frequency sound range, increases the volume (increases the sound pressure) compared with the voices output from the other speakers, and reduces the delay (so that the voices reach the ears of the viewer earlier than the voices output from the other speakers).

In a comparative example in which two speakers are provided on the left and right sides of the display unit, respectively, as shown in fig. 4, a voice signal of the left channel (L signal) may be subjected to signal processing and output to the L speaker, and a voice signal of the right channel (R signal) may be subjected to signal processing and output to the R speaker. On the other hand, in the present embodiment, as shown in fig. 5, different types of signal processing may be performed on the voice signal (L signal) to be output to the speaker of the top L (the upper speaker 131L), the voice signal (R signal) to be output to the speaker of the top R (the upper speaker 131R), the voice signal (L signal) to be output to the speaker of the bottom L (the lower speaker 132L), and the voice signal (R signal) to be output to the speaker of the bottom R (the lower speaker 132R). In each signal processing, at least one of adjustment of the sound range by the filter (a correction curve may be used), delay processing, and volume adjustment (i.e., sound pressure adjustment) is performed in accordance with the positional relationship between the specified sound source position and each speaker.

Further, the signal processing unit 112 may perform signal processing (specifically, adjustment of a sound range) in consideration of the characteristics of each speaker. The characteristics of each speaker are functional (specification) characteristics (including frequency characteristics and the like) and environmental characteristics (arrangement), and these characteristics may be different for each speaker. For example, as shown in fig. 3, there may be an environmental difference between the upper speaker 131 arranged on the upper side and the lower speaker 132 arranged on the lower side, such as a reflected sound assumed to be a sound emitted (reflected from the ceiling and reflected from the floor surface (television stand)), a sound reaching the viewer from above, or a sound reaching the viewer from below. In addition, there may also be differences in the structural environment around the speaker units, such as how much each speaker protrudes from the display unit 120-1 and how many slits are on the display unit 120-1. Further, the specifications of the speaker units may be different. In consideration of these characteristics, the signal processing unit 112 prepares a correction curve for locating a sound source in a pseudo manner and applies the correction curve to a predetermined sound source position for each voice signal to be output to each speaker. The correction curve may be generated every time or may be generated in advance.

(tuner 140)

The tuner 140 selects and receives broadcast signals of terrestrial broadcasting and satellite broadcasting.

(communication unit 150)

The communication unit 150 is connected to an external network such as the internet by using wired communication such as ethernet (registered trademark) or wireless communication such as Wi-Fi (registered trademark). For example, the communication unit 150 may be interconnected with each CE device in the home via a home network according to a standard such as digital living network alliance (DLNA, registered trademark), or may further include an interface function with an IoT device.

(remote control receiving unit 160)

The remote control receiving unit 160 receives a remote control command transmitted from a remote controller (not shown) using infrared communication, near field wireless communication, or the like.

(storage unit 170)

The storage unit 170 may be implemented by a Read Only Memory (ROM) that stores programs for controlling processes of the unit 110, operating parameters, and the like, and a Random Access Memory (RAM) that temporarily stores parameters and the like that are appropriately changed. In addition, the storage unit 170 includes a large-capacity recording device such as a Hard Disk Drive (HDD), and is mainly used to record content received by the tuner 140. Further, a storage device externally connected to the display device 10 via an interface of a high-definition multimedia interface (HDMI, registered trademark) or a Universal Serial Bus (USB) may also be used.

The configuration of the display device 10 has been specifically described above. Note that the configuration of the display device 10 according to the present disclosure is not limited to the example shown in fig. 1. For example, at least a part of the functional configuration of the control unit 110 may be provided in an external device (e.g., an information processing device communicably connected to the display device 10, a server on a network, or the like). Further, a system configuration in which the display unit 120 and the voice output unit 130 and the control unit 110 are configured as independent units and are communicably connected may be employed.

<2. example >

Next, examples of the present embodiment will be described in detail with reference to the drawings.

<2-1. first example >

Fig. 6 is a view showing adjustment of the positional relationship between an image and a sound according to the first example. As shown in fig. 6, in the present example, the image displayed on the display unit 120-1 is analyzed to recognize the object 1 (person 1) and the object 2 (person 2), and the sound source position is specified based on the movement of each object and the like. Next, the voice signals to be output to the speakers (the upper speaker 131L, the upper speaker 131R, the lower speaker 132L, and the upper speaker 131R) are processed, respectively, so that the corresponding (synchronized) voice is heard from the direction of the specified sound source position (see fig. 5). Note that in the case where a plurality of sound sources are included in a speech signal (for example, speech and sound effects), signal processing may be performed individually for each sound source.

Specifically, in the case where the subject 1 (person 1) shown in fig. 6 is a voice of a sound source position, as voice signals are output to speakers closer to a display position (sound source position) of the mouth (or face or the like) of the subject 1, each voice signal is processed so as to have a higher sound pressure, enhance a sound range of higher frequencies, and reach the ears of the viewer earlier. That is, when the voice signal to be output to the upper speaker 131L is the top; an L (Top; L) signal, a voice signal to be output to the upper speaker 131R being a ToP; an R (Top; R) signal, a voice signal to be output to the lower speaker 132L is a bottom; l (Bottom; L) signal, and the voice signal to be output to the lower speaker 132R is the Bottom; r (Bottom; R) signals, each of which is adjusted as follows. How much difference is provided for each voice signal can be determined based on the positional relationship with the sound source position, preset parameters, an upper limit, and a lower limit.

When the mouth of the object 1 is the sound source position

Sound pressure level and high frequency sound range enhancement

Top; l signal > Top; the R signal is more than or equal to Bottom; the L signal > Bottom; r signal

(Top; R signal and Bottom; L signal may be on the upper side or the same side).

Magnitude of delay (delay amount of reproduction timing)

Bottom; r signal > Bottom; the L signal is more than or equal to Top; r signal > Top; l signal

Similarly, the case where the object 2 (person 2) shown in fig. 6 is a voice of a sound source position is as follows.

When the mouth of the object 2 is the sound source position

Sound pressure level and high frequency sound range enhancement

Bottom; r signal > Top; the R signal is more than or equal to Bottom; l signal > Top; l signal

Size of delay

Top; l signal > Top; the R signal is more than or equal to Bottom; the L signal > Bottom; r signal

Fig. 7 is a flowchart showing an example of the flow of the voice output process according to the first example.

As shown in fig. 7, first, the sound source position specifying unit 111 specifies the sound source position by image recognition (step S103).

Next, the signal processing unit 112 performs different types of signal processing on the voice signal to be output to each speaker in accordance with the relative positional relationship between the specified sound source position and each speaker, so as to position the voice signal at the sound source position in a pseudo manner (step S106).

Then, the control unit 110 outputs the processed voice signal to each speaker to output voice (step S109).

<2-2. second example >

A second example is a diagram showing processing of a voice signal to be output to each speaker when a flat panel speaker is used.

Fig. 8 is a view showing adjustment of the positional relationship between an image and a sound according to the second example. The display unit 120-2 shown in fig. 8 is implemented by a flat panel speaker, a plurality of vibrators 134, 135 and 136 are disposed on a rear surface of a flat panel constituted by the display unit, and the vibrators 134, 135 and 136 vibrate the flat panel to generate sound waves forward from the flat panel.

Since the flat panel speaker generates sound waves forward from the flat panel surface by the vibration of the flat panel, it is possible to stabilize sound quality without providing a portion of the flat panel speaker protruding from the lower end or the upper end of the speaker (sound generating element), as shown in fig. 3.

Thus, for example, the upper vibrators 134L and 134R and the lower vibrators 135L and 135R may be installed slightly above and slightly below the center, respectively, and the center vibrator 136 may be installed at the center, as shown in fig. 8.

As in the first example, even in the flat panel speaker, the signal processing unit 112 analyzes the image displayed on the display unit 120-2 to recognize the object 1 (person 1) and the object 2 (person 2), and specifies the sound source position based on the movement of each object and the like. Next, the voice signals to be output to the vibrators (the upper vibrator 134L, the upper vibrator 134R, the lower vibrator 135L, the lower vibrator 135R, and the center vibrator 136) are processed, respectively, so that the corresponding voice is heard from the direction of the specified sound source position.

Fig. 9 is a diagram showing signal processing according to the second example. As shown in fig. 9, the signal processing unit 112 performs different types of signal processing according to the sound source position, and then outputs a voice signal to each vibrator. The specific description is as follows. Here, the upper vibrator 134L is referred to as Top; l, the upper vibrator 134R is referred to as Top; r, lower vibrator 135L is called Bottom; l, lower vibrator 135R is called Bottom; r and the central vibrator 136 is called the Center (Center).

When the mouth of the object 1 is the sound source position

The output is only from Top; l performs, or

When the output is from Top; when both L and Center are executed, signal processing is performed so that the sound pressure level and the sound range height are set to Top; l > Center, and the size of the delay is set to Center > Top; and L.

When the mouth of the object 2 is the sound source position

Output is only by Bottom; l performs, or

When the output is from Bottom; when both L and Center are executed, signal processing is performed so that the sound pressure level and the sound range height are set to Bottom; l > Center, and the size of the delay is set to Center > Bottom; and L.

<2-3. third example >

Further, the display device 10 can recognize the positional relationship of the viewer with respect to the display device 10 (the distance of the face from the display device 10, the height from the ground, etc.) by the camera and perform signal processing to align with the optimum sound image localization position.

Fig. 10 is a view showing a positional relationship between the display device 10 according to the third example and a viewer. As shown in fig. 10, in the case where the viewer sits on the ground to view the display device 10, sits on a chair to view the display device, stands to view the display device, or the like, the positions (heights) of the ears of the viewer are different, and therefore, the distances between the viewer and the upper speakers 131L and 131R or the lower speakers 132L and 132R are different. In general, since a nearby sound is easily perceived if the viewer is close to the sound source, when the above-described first example or second example is performed, the signal processing unit 112 achieves optimal sound image localization by weighting the adjustment of the signal processing in consideration of the height of the ear of the viewer.

For example, in the case where the viewer sits on the floor (the position of the user A) and is closer to the lower speakers 132L and 132R (Bottom; L, R) than to the upper speakers 131L and 131R (Top; L, R), it is easy to feel sound from the lower speakers 132L and 132R nearby. Thus, by highly weighting the sound pressure level and sound range to Top; l, R > Bottom; l, R or the magnitude of the delay is weighted to Bottom; l, R > Top; l, R to correct the signal processing. Note that each L/R may be appropriately selected depending on whether the user is closer to the left side of the display apparatus 10 (a speaker closer to L) or closer to the right side of the display apparatus 10 (a speaker closer to R).

Further, in the case where the viewer sits on the chair (the position of the user B) and the distance (top; L, R) between the upper speakers 131L and 131R and the distance (bottom; L, R) between the lower speakers 132L and 132R are almost the same, since the proximity of the sound source positions is equal, it is not necessary to perform correction of weighting or the like. However, in the case where the user is closer to the left side of the display apparatus 10 (the speaker closer to L) or closer to the right side of the display apparatus 10 (the speaker closer to R), the sound generated from the closer side is easily perceived, and thus the weighting can be appropriately performed. Specifically, in the case where the viewer is more rightward, weighting is performed so that the sound pressure level and the sound range height are set to Top; l > Top; r and Bottom; l > Bottom; r, and the size of the delay is set to Top; r, Bottom, respectively; r > Top; l, Bottom, respectively; and L.

Further, in a case where the viewer stands (position of the user C) and is closer to the upper speakers 131L and 131R (Top; L, R) than the lower speakers 132L and 132R (Bottom; L, R), it is easy to feel sound from the nearby upper speakers 131L and 131R. Thus, by highly weighting the sound pressure level and sound range to Bottom; l, R > Top; l, R or the magnitude of the delay is weighted to Top; l, R > Bottom; l, R to correct the signal processing. Note that each L/R may be appropriately selected depending on whether the user is closer to the left side of the display apparatus 10 (a speaker closer to L) or closer to the right side of the display apparatus 10 (a speaker closer to R).

<2-4. fourth example >

In addition to the L and R signals (L channel signal and R channel signal), a high signal, which is a sound source in the height direction, that constructs a stereo acoustic space and enables the movement of the sound source to be reproduced from an image, may be added to the voice signal. As shown in fig. 2 and 3 or fig. 8, the display device 10 according to the present embodiment has a structure including a pair of sound reproduction elements on the upper side. Therefore, when reproducing such a high signal, it is possible to reproduce the real sound to which the height component is added by synthesizing and outputting the high signal from the upper sound reproducing elements (the upper speakers 131L and 131R and the upper vibrators 134L and 134R) without separately providing a dedicated speaker. The signal processing in this case is shown in fig. 11.

Fig. 11 is a diagram illustrating signal processing according to a fourth example. As shown in fig. 11, signal processing is appropriately performed on the high signal, and the high signal is added to the L signal and the R signal to be output to Top, respectively; l, R are provided.

<3. conclusion >

Although the preferred embodiments of the present disclosure have been described in detail with reference to the accompanying drawings, the present technology is not limited to examples. Obviously, those skilled in the art can find various changes and modifications within the scope of the appended claims, and it should be understood that they will naturally fall within the technical scope of the present disclosure.

For example, although a structure in which a plurality of sets of speaker units are provided at the lower and upper ends has been mainly described, the present disclosure is not limited thereto, and a pair of speaker units may be further provided at both ends, and the arrangement of the speaker units at the lower and upper ends is not limited to the example shown in the drawings. In any arrangement, the display device 10 can process a voice signal to be output to each speaker according to the positional relationship between the sound source position obtained by analyzing the image and each speaker, and realize pseudo-sound image localization.

Further, in the case where the sound source position is not in the screen, signal processing for perceiving the center of the screen, the outside of the screen, and the like as the sound source position may be performed according to the sound. For example, sound such as background music (BGM) may use the center of the screen as a sound source position, or sound of an airplane flying from the upper left of the screen outside the screen may use the upper left of the screen as a sound source position (for example, vibration processing may be performed so that sound can be heard from a speaker located above and to the left of the screen).

Further, the processing of the voice signal output from each speaker can be seamlessly controlled according to the movement of the sound source position.

Furthermore, in addition to the sets of speaker units, one or more subwoofers (woofers (WFs)) responsible for bass reproduction may be provided (compensating for a bass range that is insufficient with the sets of speaker units). For example, the subwoofer may be applied to the configuration shown in fig. 2 or the configuration shown in fig. 8. In this case, according to the positional relationship between the sound source position specified from the image and each speaker (including the subwoofer), the voice signal to be output to each speaker may be processed to perform pseudo sound source localization.

Further, it is also possible to prepare a computer program for causing hardware such as a CPU, a ROM, and a RAM built in the above-described display apparatus 10 to express the functions of the display apparatus 10. Further, a computer-readable storage medium storing the computer program is also provided.

Further, the effects described in the present specification are merely exemplary and illustrative, and are not restrictive. In other words, techniques in accordance with the present disclosure may exhibit other effects that will be apparent to those skilled in the art and/or in lieu of the effects based on the present description.

Note that the present technology may have the following configuration.

(1)

A display device, comprising: a control unit that specifies a sound source position from the image displayed on the display unit and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

(2)

The display device according to (1), wherein the control unit performs the signal processing according to a relative positional relationship of each speaker unit with respect to the sound source position.

(3)

The display device according to (2), wherein the control unit further performs signal processing in consideration of at least a function or an environment of each speaker unit.

(4)

The display device according to any one of (1) to (3), wherein the control unit:

sound image localization processing corresponding to the sound source position is performed by performing at least one of correction of a frequency band, adjustment of sound pressure, and delay processing of reproduction timing on a voice signal.

(5)

The display device according to any one of (1) to (4), wherein the control unit:

signal processing for enhancing the high-frequency sound range component of the voice signal as the speaker unit comes closer to the sound source position is performed.

(6)

The display device according to any one of (1) to (5), wherein the control unit:

signal processing for increasing the sound pressure of the voice signal as the speaker unit comes closer to the sound source position is performed.

(7)

The display device according to any one of (1) to (6), wherein the control unit:

the delay amount of the reproduction timing of the voice signal is increased as the speaker unit is distant from the sound source position.

(8)

The display device according to any one of (1) to (7), wherein the display device comprises

And the two loudspeakers serve as the loudspeakers of the multiple groups to reproduce the voice signals of the two sound channels of the left channel and the right channel.

(9)

The display device according to (8), wherein the plurality of sets of speakers include a plurality of top speakers provided on an upper end of the rear surface of the display unit and a plurality of bottom speakers provided on a lower end of the rear surface of the display unit.

(10)

The display device according to (8), wherein,

the display unit is a flat display panel;

the speaker is a vibration unit that vibrates the display panel to output voice,

the plurality of sets of speakers include a plurality of vibration units provided on an upper portion of a rear surface of the display panel, and a plurality of vibration units provided on a lower portion of the rear surface of the display panel, and

the display device further includes a vibration unit disposed at a center of a rear surface of the display panel.

(11)

A control method by a processor comprising a control unit that:

a sound source position is specified from an image displayed on a display unit, and different types of signal processing are performed on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

(12)

A program that causes a computer to function as:

a control unit that specifies a sound source position from the image displayed on the display unit and performs different types of signal processing on a voice signal synchronized with the image according to the sound source position, the voice signal being output to a plurality of sets of speaker units including at least one set of speaker units disposed on an upper portion of the display unit.

List of reference numerals

10 display device

110 control unit

111 sound source position specifying unit

112 signal processing unit

120 display unit

130 voice output unit

131(131L, 131R) upper speaker (speaker unit)

132(132L, 132R) lower speaker (speaker unit)

134(134L, 134R) Upper vibrator

135(135L, 135R) lower vibrator

136 center vibrator

140 tuner

150 communication unit

160 remote control receiving unit

170 memory cell

180 slit

182 slits.