JP2016178497A - Reproduction device and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reproduce content by sound volume corresponding to a circumferential situation by correctly detecting circumferential sound.SOLUTION: A digital signage device 10 includes: a pair of speakers 22A, 22B for outputting sound; a first microphone 23 directed in the same direction as that of the pair of speakers 22A, 22B; a second microphone 24 directed in the different direction from that of the first microphone 23; and a control section 31 for adjusting the sound volume of the sound to be output from the pair of speakers 22A, 22B on the basis of a different between sound volume values detected by the first microphone 23 and the second microphone 24.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a playback apparatus and a program.

2. Description of the Related Art In recent years, a playback device that projects content video toward a screen and outputs content audio is known in order to provide a more impressive guide to a viewer.
In such a playback apparatus, it is desirable to play back content at a volume suitable for the installation environment. For example, a technique has been proposed in which a detection unit detects a sound level around the installation environment of the apparatus, feeds back the detection result to the apparatus, and adjusts to output a sound having a volume corresponding to the surrounding environment ( For example, see Patent Documents 1 and 2).

JP 2007-60428 A JP 2007-323451 A

  However, since the playback device itself emits sound, the techniques of Patent Documents 1 and 2 accurately distinguish whether the detection result by the detection unit is due to the sound emitted by the device itself or the ambient environmental sound. It was not done, and it was insufficient to optimize the volume for playing the content.

  An object of the present invention is to provide a playback device and a program capable of accurately detecting surrounding sounds and playing back content with a volume corresponding to the surrounding conditions.

  In order to solve the above-described problem, according to one aspect of the present invention, a playback device includes: an audio output unit that outputs audio; a first sound collection unit that is directed in the same direction as the audio output unit; Based on the difference between the volume values detected by the second sound collecting unit directed in a different direction from the first sound collecting unit, and the first sound collecting unit and the second sound collecting unit, And a control unit that adjusts the volume of the audio output from the audio output unit.

  According to another aspect of the present invention, the computer is directed to a first sound collecting unit that is directed in the same direction as the sound output unit that outputs sound, and in a direction different from the first sound collecting unit. This is a program for functioning as a control unit that adjusts the volume of the sound output from the sound output unit based on the difference between the sound volume values detected by the second sound collecting unit.

  According to the present invention, it is possible to accurately detect the surrounding sound and reproduce the content at a volume corresponding to the surrounding situation.

It is a perspective view which shows the external appearance structure of the reproducing | regenerating apparatus concerning this embodiment. It is a figure which mainly illustrates the structure of the projection optical system provided in the reproducing | regenerating apparatus along the II-II line | wire of FIG. It is a block diagram which shows the main control structure of the reproducing | regenerating apparatus of FIG. It is a flowchart which shows the content volume adjustment process which concerns on this embodiment.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

[Configuration of digital signage equipment]
FIG. 1 is a perspective view showing an external configuration of a digital signage apparatus 10 as a playback apparatus according to an embodiment of the present invention. FIG. 1 shows an external appearance of the digital signage apparatus 10 from the front side where a viewer (customer) mainly exists.

The digital signage apparatus 10 according to the present embodiment is a POS terminal that serves as both an electronic mannequin using projector technology and an ECR (electronic cash register).
A screen panel (display unit) SP is erected on the front side of the digital signage apparatus 10.
The screen panel SP is detachably attached to the digital signage device 10, and is installed so as to be within a rectangular projectable area of the digital signage device 10 and has a semi-transmission having an arbitrary shape. It is a plate-shaped member.

  By projecting rear projection type projection light, which will be described later, emitted from the inside of the digital signage apparatus 10 through the transparent portion TB (see FIG. 2) from the lower side of the back surface to the screen panel SP, an image is obtained. Is displayed.

  In addition, a plurality of (for example, four) operation buttons 21 are provided below the screen panel SP. When a viewer touches any one of the operation buttons 21, a board mounting base on the digital signage apparatus 10 side is provided. The operation positions can be detected by the arrayed linear infrared sensor arrays each having directivity.

In addition, a pair of speakers (sound output units) 22A and 22B are provided in the lower part on the front side of the digital signage device 10, and a first microphone 23 is provided in the center between the pair of speakers 22A and 22B.
Further, a second microphone 24 (see FIG. 2) similar to the first microphone 23 on the front side is provided at the lower back side of the digital signage device 10.
The first microphone 23 is directed in the direction of collecting ambient sounds on the front side of the digital signage device 10. Further, the second microphone 24 is directed in a direction to collect ambient sounds on the back side of the digital signage device 10.
In other words, the first microphone 23 and the second microphone 24 are oriented in directions different from each other by 180 °, and are arranged to detect ambient sounds on the front side and the back side of the digital signage device 10, respectively. is there.

In the present embodiment, as described above, the first microphone 23 and the second microphone 24 are exemplified to be installed so that their directions are different by 180 °. The second microphone 24 only needs to be installed so that its orientation differs by 90 ° or more.
As the first microphone 23 and the second microphone 24, as described above, two microphones capable of collecting sounds within a certain range may be installed in opposite directions, and sounds in all directions may be used. By providing a sound barrier at the boundary between two microphones that can collect sound, it is possible to provide the same function as when two microphones that can collect sound within a certain range are installed in the opposite direction.

Further, a touch panel (operation unit) 25 and a keyboard (operation unit) 26 for accounting processing are provided on the back side of the digital signage device 10.
The digital signage apparatus 10 is integrally mounted on a cash drawer 11 that stores cash therein.

  FIG. 2 is a diagram exemplarily showing a configuration of a projection optical system provided in the digital signage apparatus 10 along the line II-II in FIG.

As shown in FIG. 2, a projection unit 30 that generates projection light LF and projects the projection light LF on the back side of the screen panel SP is located below the back side of the screen panel SP. Is provided.
The projection light LF emitted obliquely downward and rearward from the projection unit 30 is reflected rearwardly and upwardly by the concave-curved first total reflection mirror 27, and then screened to the digital signage device 10 via the transparent portion TB. After being further reflected by the second total reflection mirror 28 erected in the shape, the light is projected on the back side of the screen panel SP.

  The screen panel SP is composed of a plate-like member in which two layers of a Fresnel lens on the back side and a diffuse transmission plate on the front side are integrated, and the projection light LF projected obliquely from below on the back side is converted into digital signage by the Fresnel lens. It is deflected into a light beam parallel to the installation surface of the apparatus 10. The projection light LF deflected by the Fresnel lens is projected onto a translucent and translucent diffuser transmission plate on the front side of the screen panel SP, so that the customer located in front of the digital signage apparatus 10 On the other hand, a light image is displayed.

FIG. 3 is a block diagram illustrating a main control configuration of the digital signage apparatus 10.
The main configuration of the digital signage apparatus 10 according to the present embodiment will be further described with reference to the block diagram shown in FIG.

  The projection unit 30 mainly includes a control unit 31, a projector 32, a storage unit 33, and a communication unit 34. The projector 32, the storage unit 33, and the communication unit 34 are connected to the control unit 31, respectively. ing. The control unit 31 is connected with an operation button 21, a pair of speakers 22 </ b> A and 22 </ b> B, a first microphone 23, a second microphone 24, a touch panel 25, and a keyboard 26.

The control unit 31 includes a central processing unit (CPU) that executes various programs stored in the storage unit 33 to perform predetermined calculations and control of each unit, and a memory that is a work area when the program is executed. (Both not shown).
And the control part 31 performs the content volume adjustment process mentioned later by cooperation with the program memorize | stored in the program memory | storage part 331 of the memory | storage part 33. FIG.

The projector 32 is a projection device that converts various data (moving image data, still image data, etc.) output from the control unit 31 into projection light and irradiates the screen panel SP.
For example, as the projector 32, a display operation is performed by individually turning on / off each inclination angle of a plurality of micromirrors (in the case of XGA, horizontal 1024 pixels × vertical 768 pixels) arranged in an array at a high speed. Therefore, a DLP (Digital Light Processing) (registered trademark) projector using a DMD (digital micromirror device) which is a display element that forms a light image by the reflected light can be applied.

The storage unit 33 is configured by an HDD, a nonvolatile semiconductor memory, or the like, and is provided with a program storage unit 331, a data storage unit 332, and the like.
For example, the program storage unit 331 stores a system program executed by the control unit 31, various processing programs, data necessary for executing these programs, and the like.
The data storage unit 332 stores moving image data, still image data, audio data for content audio output, and the like that are to be displayed during content reproduction.

The communication unit 34 enables communication with an external information terminal and performs data transmission / reception.
The specific communication method is not particularly limited, and may be, for example, wireless communication using a wireless LAN, Bluetooth (registered trademark), NFC, or the like, for example, wired communication using a USB cable or the like. Also good.
The communication unit 34 is also used when, for example, data such as new content to be displayed on the screen panel SP is taken into the data storage unit 332.

[Operation of Digital Signage Device 10]
Next, the operation of the digital signage apparatus 10 will be described.

  FIG. 4 is a flowchart showing content volume adjustment processing by the digital signage apparatus 10.

  First, the control unit 31 determines whether or not the touch panel 25 or the keyboard 26 for the accounting process of the digital signage device 10 is being operated (step S1).

  If the touch panel 25 or the keyboard 26 is being operated (step S1: YES), the control unit 31 adjusts the content playback volume to a predetermined volume set in advance (step S2), and ends the process.

  Here, when “the touch panel 25 or the keyboard 26 is being operated”, the control unit 31 determines that there is a viewer on the front side of the digital signage device 10 and a store clerk or an explanation person on the back side, The playback volume is adjusted to a predetermined volume that is appropriate for a viewer near the digital signage device 10.

  Next, the control unit 31 determines whether or not the pair of speakers 22A and 22B is outputting, that is, whether or not the pair of speakers 22A and 22B is on (outputting), and if not (step S3: NO). Then, the process proceeds to step S5 described later.

On the other hand, when the pair of speakers 22A and 22B is on (step S3: YES), the control unit 31 adds the volume value output by the pair of speakers 22A and 22B to the volume value detected by the second microphone 24. As described above, the second microphone 24 is set (step S4).
In this process, since the first microphone 23 and the second microphone 24 are installed in different directions and collect sound in different ranges, only the first microphone 23 installed on the front side outputs the speakers 22A and 22B. This is performed in order to prevent the difference between the detection results of the two microphones being calculated in step S6, which will be described later, depending on whether the speakers 22A and 22B are on or off.

Subsequently, the control part 31 acquires the detection result of the 1st microphone 23 and the 2nd microphone 24 (step S5). That is, the control unit 31 detects the volume of ambient sound on the front side and the back side of the digital signage device 10.
In the following description, the ambient sound level (volume value) of the first microphone 23 on the front side of the digital signage device 10 is A, and the ambient sound level (volume level) of the second microphone 24 on the back side of the digital signage device 10. Value) is B.

  Next, the control unit 31 calculates a difference (A−B) between detection results of the first microphone 23 and the second microphone 24, and determines whether or not the difference is equal to or less than a predetermined value set in advance (step S6). ).

  If the difference is equal to or smaller than a predetermined value set in advance (step S2: YES), the control unit 31 increases the playback volume of the content (step S7), and proceeds to step S11 described later.

  Here, when “the difference is equal to or less than a predetermined value set in advance”, the control unit 31 determines that there is no one around the digital signage device 10 (front side and back side), for example. That is, the control unit 31 determines that the viewer is far away from the digital signage device 10 and increases the playback volume of the content.

  On the other hand, when the difference is larger than a predetermined value set in advance (step S6: NO), the control unit 31 determines that the ambient sound level (A) of the first microphone 23 is the ambient sound level (B) of the second microphone 24. It is determined whether or not this is the case (step S8).

  When the ambient sound level (A) of the first microphone 23 is equal to or higher than the ambient sound level (B) of the second microphone 24 (step S8: YES), the control unit 31 reduces the playback volume of the content ( Step S9) and the process proceeds to Step S11 described later.

  Here, when the difference is greater than a predetermined value set in advance and the ambient sound level (A) of the first microphone 23 is equal to or higher than the ambient sound level (B) of the second microphone 24, the control unit 31 For example, it is determined that there is a person (viewer) only on the front side of the digital signage device 10. Therefore, the control unit 31 determines that the viewer is close to the digital signage device 10 and reduces the content playback volume.

  On the other hand, when the ambient sound level (A) of the first microphone 23 is lower than the ambient sound level (B) of the second microphone 24 (step S8: NO), the control unit 31 increases the playback volume of the content ( Step S10), the process proceeds to Step S11 described later.

  Here, when the difference is larger than a predetermined value set in advance and the ambient sound level (A) of the first microphone 23 is smaller than the ambient sound level (B) of the second microphone 24, the control unit 31 For example, it is determined that there is a person (a store clerk or an explanation staff) only on the back side of the digital signage device 10. Therefore, the control unit 31 determines that the viewer is far away from the digital signage device 10 and increases the playback volume of the content.

Next, the control unit 31 determines whether or not to continue the process (step S11). When the process is continued (step S11: YES), the control unit 31 returns to step S1 and repeats the subsequent processes.
On the other hand, when the process is not continued (step S11: NO), this process ends.

As described above, according to the digital signage device 10 of the present embodiment, the pair of speakers 22A and 22B that output sound, the first microphone 23 that is directed in the same direction as the pair of speakers 22A and 22B, Output from the pair of speakers 22A and 22B based on the difference in volume value detected by the second microphone 24 directed in a different direction from the first microphone 23 and the first microphone 23 and the second microphone 24. And a control unit 31 that adjusts the volume of the sound to be played.
For this reason, the volume of the content to be reproduced can be adjusted based on the surrounding sound. Therefore, it is possible to accurately detect the volume of the surrounding sound and reproduce the content at a volume corresponding to the surrounding situation.

Further, according to the digital signage device 10 of the present embodiment, the control unit 31 is configured such that when the difference between the volume values detected by the first microphone 23 and the second microphone 24 is equal to or less than a predetermined value, the pair of speakers 22A, 22A, The volume of the sound output from 22B is increased.
For this reason, assuming that there is no viewer around the digital signage device 10, the volume of the sound output from the pair of speakers 22A and 22B can be increased.

Moreover, according to the digital signage apparatus 10 of the present embodiment, the first microphone 23 and the second microphone 24 are installed so that their directions are different by 90 ° or more. Desirably, they are installed so that the directions are different by 180 °.
For this reason, it is possible to detect the ambient sound on the front side and the back side of the digital signage device 10 and adjust the volume of the sound output from the pair of speakers 22A and 22B.

Further, according to the digital signage device 10 of the present embodiment, the control unit 31 has a difference in volume value detected by the first microphone 23 and the second microphone 24 that is greater than a predetermined value, and the first microphone 23. When the volume value detected by is higher than the volume value detected by the second microphone 24, the volume of the sound output from the pair of speakers 22A and 22B is reduced.
For this reason, assuming that there is a viewer around the digital signage device 10 (front side), the volume of the sound output from the pair of speakers 22A and 22B can be reduced.

Further, according to the digital signage device 10 of the present embodiment, the control unit 31 has a difference between the volume values detected by the first microphone 23 and the second microphone 24 that is greater than a predetermined value, and the first microphone. When the volume value detected by 23 is smaller than the volume value detected by the second microphone 24, the volume of the sound output from the pair of speakers 22A and 22B is increased.
For this reason, it is assumed that there are no viewers around the digital signage device 10 (front side) and there are shop assistants around the digital signage device 10 (back side), and the audio output from the pair of speakers 22A and 22B. The volume of can be increased.

In addition, according to the digital signage device 10 of the present embodiment, the control unit 31 has the volume values detected by the first microphone 23 and the second microphone 24 when the outputs of the pair of speakers 22A and 22B are on. Based on the difference, the volume of the sound output from the pair of speakers 22A and 22B is adjusted.
For this reason, the sound output from the pair of speakers 22A and 22B can be adjusted to an appropriate volume in real time. Therefore, it is not necessary to stop the pair of speakers 22A and 22B for volume adjustment, which is convenient.

The digital signage apparatus 10 according to the present embodiment includes a screen panel SP that displays a content image.
For this reason, it is possible to output an image together with sound, and to perform an advertisement impressed by the viewer.

The digital signage apparatus 10 of the present embodiment also includes a touch panel 25 and a keyboard 26 for accounting processing.
For this reason, advertisement can be performed near the cash register of the store.

Further, according to the digital signage device 10 of the present embodiment, the control unit 31 adjusts the volume of the sound output from the pair of speakers 22A and 22B to a predetermined volume while the touch panel 25 and the keyboard 26 are operated. .
For this reason, while the accounting process is being performed by the digital signage device 10, it is assumed that there is a viewer (and a store clerk) around the digital signage device 10 and output from the pair of speakers 22A and 22B. The sound volume can be adjusted to a predetermined volume (for example, the minimum volume).

  Moreover, in the said embodiment, when the difference of the 1st microphone 23 and the 2nd microphone 24 is larger than predetermined value, it is based on which volume value of the 1st microphone 23 and the 2nd microphone 24 is large. However, it is also possible to perform control for adjusting the volume in a plurality of stages based on the magnitude of the difference.

  In the above-described embodiment, the digital signage device 10 is a so-called registration signage device that performs accounting processing. However, the digital signage device 10 does not have a function of performing accounting processing. It may be a device.

In the above-described embodiment, the pair of speakers 22A and 22B are provided, and the first microphone 23 is provided at the center between the pair of speakers 22A and 22B. Of course, the number may be one or three or more.
In the above embodiment, the configuration in which an image is displayed on the screen panel SP has been described as an example. However, as a playback device to which the present invention can be applied, it is sufficient that at least sound is output. The structure which is not provided may be sufficient.

  Moreover, in the said embodiment, when a pair of speaker 22A, 22B is ON (FIG. 4: step S3, YES), the setting of the 2nd microphone 24 is performed (FIG. 4: step S4). As described above, instead of setting the second microphone 24, a predetermined value of the difference between the first microphone 23 and the second microphone 24 is set when the pair of speakers 22A and 22B is turned on and off. It may be changed.

As mentioned above, although several embodiment of this invention was described, the scope of the present invention is not limited to the above-mentioned embodiment, The range of the invention described in the claim is equal to the equivalent range. Including.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
An audio output unit for outputting audio;
A first sound collection unit oriented in the same direction as the audio output unit;
A second sound collection unit oriented in a different direction from the first sound collection unit;
A control unit that adjusts the volume of the sound output from the sound output unit based on the difference between the volume values detected by the first sound collection unit and the second sound collection unit;
A playback apparatus comprising:
<Claim 2>
When the difference between the volume values detected by the first sound collection unit and the second sound collection unit is a predetermined value or less, the control unit increases the volume of the sound output from the sound output unit. The playback apparatus according to claim 1, wherein
<Claim 3>
3. The playback apparatus according to claim 1, wherein the first sound collecting unit and the second sound collecting unit are installed so that their directions are different by 90 ° or more.
<Claim 4>
The control unit is configured such that a difference between volume values detected by the first sound collecting unit and the second sound collecting unit is larger than a predetermined value, and a volume value detected by the first sound collecting unit is the first sound collecting unit. 4. The playback device according to claim 1, wherein the volume of the audio output from the audio output unit is reduced when the volume value detected by the second sound collection unit is equal to or greater than the volume value.
<Claim 5>
The control unit is configured such that a difference between volume values detected by the first sound collecting unit and the second sound collecting unit is larger than a predetermined value, and a volume value detected by the first sound collecting unit is the first sound collecting unit. 5. The playback apparatus according to claim 1, wherein the volume of the sound output from the sound output unit is increased when the sound collection unit of 2 is smaller than the detected sound volume value.
<Claim 6>
When the output of the sound output unit is on, the control unit outputs from the sound output unit based on a difference between volume values detected by the first sound collection unit and the second sound collection unit. The playback apparatus according to claim 1, wherein the volume of the sound is adjusted.
<Claim 7>
The playback apparatus according to claim 1, further comprising a display unit that displays a content image.
<Claim 8>
The playback apparatus according to claim 1, further comprising an operation unit for accounting processing.
<Claim 9>
The playback apparatus according to claim 8, wherein the control unit adjusts a volume of a sound output from the sound output unit to a predetermined volume while the operation unit is operated.
<Claim 10>
Computer
The volume value detected by the first sound collection unit directed in the same direction as the sound output unit that outputs sound and the second sound collection unit directed in a different direction from the first sound collection unit A control unit that adjusts the volume of the sound output from the sound output unit based on the difference;
Program to function as.

10 Digital signage device (playback device)
11 Cash drawer 21 Operation buttons 22A, 22B Speaker (voice output unit)
23 First microphone (first sound collecting unit)
24 Second microphone (second sound collection unit)
25 Touch panel (operation unit)
26 Keyboard (operation unit)
SP screen panel (display unit)
27 first total reflection mirror 28 second total reflection mirror TB transparent unit 30 projection unit 31 control unit 32 projector 33 storage unit 331 program storage unit 332 data storage unit 34 communication unit

Claims (10)

An audio output unit for outputting audio;
A first sound collection unit oriented in the same direction as the audio output unit;
A second sound collection unit oriented in a different direction from the first sound collection unit;
A control unit that adjusts the volume of the sound output from the sound output unit based on the difference between the volume values detected by the first sound collection unit and the second sound collection unit;
A playback apparatus comprising:   When the difference between the volume values detected by the first sound collection unit and the second sound collection unit is a predetermined value or less, the control unit increases the volume of the sound output from the sound output unit. The playback apparatus according to claim 1, wherein   3. The playback apparatus according to claim 1, wherein the first sound collecting unit and the second sound collecting unit are installed so that their directions are different by 90 ° or more.   The control unit is configured such that a difference between volume values detected by the first sound collecting unit and the second sound collecting unit is larger than a predetermined value, and a volume value detected by the first sound collecting unit is the first sound collecting unit. 4. The playback device according to claim 1, wherein the volume of the audio output from the audio output unit is reduced when the volume value detected by the second sound collection unit is equal to or greater than the volume value.   The control unit is configured such that a difference between volume values detected by the first sound collecting unit and the second sound collecting unit is larger than a predetermined value, and a volume value detected by the first sound collecting unit is the first sound collecting unit. 5. The playback apparatus according to claim 1, wherein the volume of the sound output from the sound output unit is increased when the sound collection unit of 2 is smaller than the detected sound volume value.   When the output of the sound output unit is on, the control unit outputs from the sound output unit based on a difference between volume values detected by the first sound collection unit and the second sound collection unit. The playback apparatus according to claim 1, wherein the volume of the sound is adjusted.   The playback apparatus according to claim 1, further comprising a display unit that displays a content image.   The playback apparatus according to claim 1, further comprising an operation unit for accounting processing.   The playback apparatus according to claim 8, wherein the control unit adjusts a volume of a sound output from the sound output unit to a predetermined volume while the operation unit is operated. Computer
The volume value detected by the first sound collection unit directed in the same direction as the sound output unit that outputs sound and the second sound collection unit directed in a different direction from the first sound collection unit A control unit that adjusts the volume of the sound output from the sound output unit based on the difference;
Program to function as.

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