JP6955838B2 - Playback control device, playback control method and program - Google Patents

Description

The present invention relates to a technique for providing a guidance voice.

Various technologies for reproducing contents such as images and sounds on mobile terminals have been conventionally proposed. For example, Patent Document 1 discloses a technique for distributing content according to the position of a mobile terminal to a mobile terminal registered in advance as a distribution target.

JP-A-2002-351905

For example, in transportation such as trains and buses, guidance voices that guide users to information on getting on and off, transfer, etc. are played at any time. If content such as a character string of the pronunciation content of the guidance voice and a translated sentence can be provided to the user's mobile terminal for each sound of the guidance voice, for example, it is difficult for a hearing-impaired person who has difficulty in listening to the guidance voice or to understand the language of the guidance voice. It is convenient for users such as foreigners to be able to grasp the content of the guidance voice. However, under the technology of Patent Document 1, it is not assumed that the content linked to the actual sound emission of the guidance voice is provided. In consideration of the above circumstances, an object of the present invention is to realize the use of content linked to the sound emission of the guidance voice.

In order to solve the above problems, the signal generator of the present invention is a signal generator that generates an acoustic signal supplied to the sound emitting device, and reproduces the original acoustic signal representing the guidance sound by the sound emitting device. The component suppressing means for generating the first acoustic signal by suppressing the acoustic component of the used band extending from the upper limit of the band to the predetermined width on the low frequency side, and the identification information of the content related to the guidance sound are used as the acoustic component in the used band. It includes a modulation processing means for generating a second acoustic signal to be contained, and a mixing processing means for synthesizing a first acoustic signal generated by the component suppressing means and a second acoustic signal generated by the modulation processing means. In the above configuration, the acoustic signal is generated by synthesizing the first acoustic signal representing the guidance voice and the second acoustic signal indicating the identification information of the content related to the guidance voice. Therefore, it is possible to emit the guidance voice by supplying the acoustic signal to the sound emitting device and to use the content specified by the identification information in the acoustic signal. In addition, among the original acoustic signals representing the guidance sound, the first acoustic signal that suppresses the acoustic component of the utilization band over the predetermined width on the low frequency side from the upper limit of the reproduction band by the sound emitting device, and the sound within the utilization band using the identification information. Since the acoustic signal is generated by synthesizing with the second acoustic signal contained as a component, the identification information can be obtained from the acoustic signal while reducing the possibility that the acoustic component of the identification information is perceived by the user listening to the guidance sound. It has the advantage of being able to extract with high accuracy.

Assuming that it is the acoustic component of about 4 kHz or less that is particularly important for the user to recognize the content of the guidance voice, the used band is included in the frequency band of 5 kHz or more and 8 kHz or less, and the band of the used band. A mode in which the width is 2 kHz or more and 3 kHz or less is particularly preferable. According to the above aspect, it is possible to include the identification information in the acoustic signal without disturbing the recognition of the guidance voice by the user.

In a preferred embodiment of the present invention, the modulation processing means generates a second acoustic signal having a sound pressure level in the range of −80 dB or more and −50 dB or less with respect to the sound pressure level of the guidance sound represented by the first acoustic signal. .. In the above aspect, since the sound pressure level of the second acoustic signal is set to -50 dB or less with respect to the sound pressure level of the guidance voice, the acoustic component of the identification information can be perceived by the user listening to the guidance voice. The effect of being able to reduce the sex is remarkable. Further, since the sound pressure level of the second acoustic signal is set to −80 dB or more with respect to the sound pressure level of the guidance voice, there is an advantage that the identification information can be extracted with high accuracy by the analysis of the acoustic signal.

The voice guidance device according to the present invention is a sound emitting device that emits a sound corresponding to an acoustic signal, and a predetermined width on the low frequency side from the upper limit value of the reproduction band by the sound emitting device among the original acoustic signals representing the guidance sound. A sound emitting device and a sound emitting device combine a first acoustic signal that suppresses the acoustic component of the used band and a second acoustic signal that contains identification information of the content related to the guidance sound as the acoustic component in the used band. It is provided with an information extraction means capable of extracting identification information by analyzing the acoustic signal and a reproduction processing means for supplying the identification information. In the above aspect, since the acoustic signal is generated by synthesizing the first acoustic signal representing the guidance voice and the second acoustic signal indicating the identification information of the content related to the guidance voice, the acoustic signal is supplied to the sound emitting device. It is possible to emit a guidance voice and use the content specified by the identification information in the acoustic signal. In addition, among the original acoustic signals representing the guidance sound, the first acoustic signal that suppresses the acoustic component of the utilization band over the predetermined width on the low frequency side from the upper limit of the reproduction band by the sound emitting device, and the sound within the utilization band using the identification information. Since the acoustic signal generated by synthesizing with the second acoustic signal contained as a component is used, it is identified from the acoustic signal while reducing the possibility that the acoustic component of the identification information is perceived by the user listening to the guidance sound. There is an advantage that information can be extracted with high accuracy.

In a preferred example of the voice guidance device according to the present invention, the reproduction processing means transmits an acoustic signal by wire to an information extraction means mounted on a management terminal separate from the voice guidance device. In the above aspect, the acoustic signal containing the acoustic component of the guidance voice and the acoustic component of the identification information is transmitted from the reproduction processing means to the management terminal by wire. Therefore, there is an advantage that the identification information can be identified with high accuracy from the acoustic signal even when the volume of the acoustic component is sufficiently suppressed so that the acoustic component of the identification information is not easily perceived.

The signal generation device and the voice guidance device according to each of the above aspects are realized not only by a dedicated electronic circuit but also by the cooperation of a general-purpose arithmetic processing unit such as a CPU (Central Processing Unit) and a program. The program of the present invention may be provided and installed in a computer in a form stored in a computer-readable recording medium. The recording medium is, for example, a non-transitory recording medium, and an optical recording medium (optical disc) such as a CD-ROM is a good example, but a known arbitrary such as a semiconductor recording medium or a magnetic recording medium is used. Can include recording media in the form of. For example, the program of the present invention may be provided in the form of distribution via a communication network and installed on a computer.

It is a block diagram of the information providing system which concerns on 1st Embodiment of this invention. It is a block diagram of a voice guidance device. It is a block diagram of a signal generator. It is explanatory drawing of the operation of a signal generator. It is a flowchart of operation of a signal generator. It is a block diagram of a management terminal. It is a block diagram of a mobile terminal. It is a block diagram of an information providing apparatus. It is explanatory drawing of the operation of an information providing system. It is a block diagram of the mobile terminal in 2nd Embodiment.

<First Embodiment>
FIG. 1 is a configuration diagram of an information providing system 100 according to the first embodiment. The information providing system 100 of the first embodiment is a computer system that provides information to a user HA of a transportation system such as a train or a bus, and includes a voice guidance device 12, a management terminal 14, and an information providing device 16. Each user HA located in the vehicle M of the transportation means carries the mobile terminal 20. The mobile terminal 20 is a portable communication terminal such as a mobile phone or a smartphone. Actually, a plurality of mobile terminals 20 may exist in the vehicle M, but in the following description, an arbitrary one mobile terminal 20 will be focused on for convenience.

The voice guidance device 12 and the management terminal 14 are installed in the vehicle M, and the information providing device 16 is connected to a communication network 18 including a mobile communication network, the Internet, and the like. The mobile terminal 20 and the management terminal 14 can communicate with the information providing device 16 via the communication network 18. The voice guidance device 12 emits a voice for guidance regarding transportation (hereinafter referred to as "guidance voice") to the user HA in the vehicle M. The guidance voice is, for example, a voice that guides people getting on and off transportation (names of stop points such as train stations and bus stops), transfers, fares, operating conditions (for example, whether there is a delay), and sightseeing spots in the vicinity.

In the information providing system 100 of the first embodiment, as exemplified in FIG. 1, each time the guidance voice is emitted by the voice guidance device 12, the provision instruction P of the content C related to the guidance voice is given. The management terminal 14 transmits the information to the information providing device 16, and the distribution information Q including the content C specified in the providing instruction P is transmitted from the information providing device 16 to the mobile terminal 20. The content C delivered from the information providing device 16 to the mobile terminal 20 is a voice or an image (for example, a still image, a moving image, a character string) related to the guidance voice. For example, various information such as a character string expressing the pronunciation content of the guidance voice, a character string obtained by translating the language of the pronunciation content into another language, or voice is provided to the mobile terminal 20 as the content C. In the first embodiment, it is assumed that guidance regarding a plurality of guidance targets is provided. The guidance target means an object of guidance, and is typically a place where guidance is provided. In FIG. 1, the vehicle M of transportation is illustrated as a guidance target, but in reality, a voice guidance device 12 and a management terminal 14 are installed for each of the plurality of guidance targets (for example, for each vehicle M of the same type of transportation). NS. On the other hand, the information providing device 16 is shared by a plurality of guidance targets.

<Voice guidance device 12>
FIG. 2 is a configuration diagram of the voice guidance device 12. As illustrated in FIG. 2, the voice guidance device 12 includes a reproduction processing unit 32 and a sound emitting device 34. The reproduction processing unit 32 supplies an acoustic signal S representing a guidance voice to the sound emitting device 34, and the sound emitting device 34 (for example, a speaker) supplies a guidance sound corresponding to the acoustic signal S supplied from the reproduction processing unit 32 to the vehicle. Sound is emitted in M.

As illustrated in FIG. 2, the reproduction processing unit 32 includes a control unit 322, a storage unit 324, and an operation unit 326. The storage unit 324 is a known recording medium such as a magnetic recording medium or a semiconductor recording medium, and stores a plurality of acoustic signals S corresponding to guidance voices having different pronunciation contents. For example, for each of a plurality of points where vehicle M stops (for example, a stop point such as a train station or a bus stop), a guidance voice that guides arrival at the point, transfer at the point, and information around the point. The acoustic signal S of is stored in the storage unit 324. The operation unit 326 is an input device that accepts operations by the transportation manager (typically the driver of the vehicle M) HB. For example, the administrator HB can select any one of the plurality of guidance voices stored in the storage unit 324 by appropriately operating the operation unit 326.

The control unit 322 is composed of a processing device such as a CPU, and controls each element of the voice guidance device 12 in an integrated manner. The control unit 322 of the first embodiment supplies the acoustic signal S of the guidance voice selected by the administrator HB by the operation to the operation unit 326 among the plurality of acoustic signals S stored in the storage unit 324 to the sound emitting device 34. .. Therefore, the guidance voice is emitted from the sound emitting device 34 for each instruction by the administrator HB. The user HA in the vehicle M can hear the guidance voice emitted from the sound emitting device 34.

The acoustic signal S of any one guidance voice contains identification information D for uniquely identifying the content C related to the guidance voice. The signal generation device 200 illustrated in FIG. 2 is a device that generates an acoustic signal S containing the identification information D. A plurality of acoustic signals S generated by the signal generation device 200 for different guidance voices are transferred to the voice guidance device 12 via, for example, a communication network 18 or a portable recording medium, and then stored in the storage unit 324.

<Signal generator 200>
FIG. 3 is a configuration diagram of the signal generation device 200. As illustrated in FIG. 3, the signal generation device 200 includes a control unit 42 and a storage unit 44. The control unit 42 of the signal generation device 200 is composed of a processing device such as a CPU, for example, and executes a program stored in the storage unit 44 to generate a plurality of elements (component suppression unit 422) for generating an acoustic signal S. , Modulation processing unit 424, Mixing processing unit 426). The storage unit 44 is a known recording medium such as a magnetic recording medium or a semiconductor recording medium. The storage unit 44 of the first embodiment is unique to the acoustic signal (hereinafter referred to as "original acoustic signal") S0 representing the guidance voice and the content C related to the guidance voice for each of the plurality of different guidance voices. Identification information D and the above are stored. The guidance voice represented by the original sound signal S0 is, for example, a recorded sound of a voice actually pronounced by a specific speaker or a voice generated by a known voice synthesis technique.

FIG. 4 is an explanatory diagram of the operation of the signal generation device 200. As illustrated in FIG. 4, the original acoustic signal S0 contains an acoustic component over substantially the entire frequency band (hereinafter referred to as “reproduction band”) B0 of the acoustic that can be reproduced by the sound emitting device 34. In the first embodiment, a low-performance sound emitting device 34 that cannot reproduce the acoustic component of the frequency band on the high frequency side of the audible band from about 20 Hz to 20 kHz is assumed. Specifically, a case where the upper limit value F of the reproduction band B0 of the sound emitting device 34 is 8 kHz is illustrated.

As illustrated in FIG. 4, the component suppression unit 422 of FIG. 3 is a predetermined band on the low frequency side from the upper limit value F of the reproduction band B0 by the sound emitting device 34 among the original acoustic signals S0 stored in the storage unit 44. An acoustic signal (first acoustic signal) SA is generated by suppressing the acoustic component of the frequency band (hereinafter referred to as "utilization band") BA over the width W. For example, a low-pass filter having a frequency FC whose cutoff frequency is lower than the upper limit value F by the bandwidth W of the used band BA is used as the component suppression unit 422.

The modulation processing unit 424 of FIG. 3 generates an acoustic signal (second acoustic signal) SB containing the identification information D stored in the storage unit 44 as an acoustic component in the utilization band BA. A known method can be arbitrarily adopted for generating the acoustic signal SB containing the identification information D, and for example, the method disclosed in International Publication No. 2010/016589 is preferable. Specifically, the modulation processing unit 424 sequentially executes the diffusion modulation of the identification information D using the spread code and the frequency modulation using the carrier wave in the use band BA to use the identification information D in the use band BA. Generates an acoustic signal SB contained as an acoustic component inside.

The mixing processing unit 426 of FIG. 3 generates an acoustic signal S by synthesizing the acoustic signal SA after processing by the component suppression unit 422 and the acoustic signal SB after processing by the modulation processing unit 424. For example, the mixing processing unit 426 generates the acoustic signal S by adding the acoustic signal SA and the acoustic signal SB. As understood from the above description, the acoustic signal S of any one guidance voice is the acoustic component (acoustic signal SA) of the guidance voice and the acoustic component of the identification information D of the content C related to the guidance voice. (Acoustic signal SB of the utilization band BA) is included.

The bandwidth W of the used band BA is set to an appropriate numerical value necessary for extracting the identification information D from the acoustic signal S. Specifically, a configuration in which the bandwidth W is set to a predetermined value within a range of 2 kHz or more and 3 kHz or less is preferable. Therefore, assuming that the upper limit value F of the reproduction band B0 of the reproduction band B0 of the sound emitting device 34 is 8 kHz as described above, the used band BA is included in the frequency band of 5 kHz or more and 8 kHz or less. In the first embodiment, the case where the bandwidth W is set to 2 kHz is illustrated. Therefore, the used band BA is a frequency band of 6 kHz or more and 8 kHz or less included in the audible band.

The modulation processing unit 424 of the first embodiment adjusts the acoustic signal SB to a sufficiently low volume as compared with the acoustic signal SA. Specifically, the sound pressure level of the acoustic signal SB is adjusted within a range of −80 dB or more and -50 dB or less with respect to the sound pressure level of the guidance voice represented by the acoustic signal SA.

FIG. 5 is a flowchart of the operation of the signal generator 200. In addition, in FIG. 4, reference numerals (S1 to S3) of each step of FIG. 5 are shown for convenience. As illustrated in FIG. 5, the component suppression unit 422 of the signal generation device 200 stores the original acoustic signal S0 of any one guidance voice (hereinafter referred to as “target guidance voice”) among the plurality of guidance voices in the storage unit 44. The acoustic signal SA is generated by suppressing the acoustic component in the utilization band BA of the original acoustic signal S0 of the target guidance voice (S1). On the other hand, the modulation processing unit 424 acquires the identification information D of the content C related to the target guidance voice from the storage unit 44, and generates an acoustic signal SB containing the identification information D as an acoustic component in the use band BA ( S2). The mixing processing unit 426 generates an acoustic signal S of the target guidance voice by synthesizing the acoustic signal SA generated by the component suppression unit 422 and the acoustic signal SB generated by the modulation processing unit 424 (S3). By sequentially executing the above processing for each of the plurality of guidance voices, a plurality of acoustic signals S corresponding to different guidance voices are generated and transferred to the storage unit 324 of the voice guidance device 12. The generation of the acoustic signal SA (S1) and the generation of the acoustic signal SB (S2) can be reversed.

As understood from the above description, in the first embodiment, the acoustic signal S emitted from the sound emitting device 34 of the voice guidance device 12 is used as an acoustic component (acoustic signal SB) of the used band BA in the audible band. Identification information D is included. However, as described above, since the volume of the acoustic signal SB is sufficiently low (-80 dB to -50 dB) as compared with the guidance voice of the acoustic signal SA, the user HA in the vehicle M clearly perceives the guidance voice. On the other hand, the acoustic component of the identification information D in the utilization band BA can hardly be perceived. Further, in the first embodiment, since the acoustic component of the identification information D is contained in the utilization band BA located at the end on the high frequency side of the reproduction band B0 of the sound emitting device 34, for example, the middle in the reproduction band B0. The effect that the acoustic component of the identification information D is less likely to be perceived by the user HA is remarkable as compared with the configuration in which the acoustic component of the identification information D is contained in the frequency band of.

It should be noted that what is particularly important for the user HA to recognize the content of the guidance voice is an acoustic component of approximately 4 kHz or less. That is, even if the acoustic component of the guidance voice of about 4 kHz or higher is suppressed, the user HA may recognize the deterioration of the sound quality of the guidance voice, but it is sufficiently possible to recognize the content of the guidance voice. Is. In the first embodiment, since the used band BA is included in the frequency band of 5 kHz or more and 8 kHz or less, it is possible to include the identification information D in the acoustic signal S without disturbing the recognition of the guidance voice by the user. be. As understood from the above description, in the first embodiment, it can be paraphrased that the identification information D is transmitted by using the used band BA which does not excessively affect the recognition of the content of the guidance voice in the audible band.

As illustrated in FIG. 1, the management terminal 14 is connected to the reproduction processing unit 32 of the voice guidance device 12 via the signal line (cable) 13. The control unit 322 of the reproduction processing unit 32 supplies the acoustic signal S stored in the storage unit 324 to the sound emitting device 34 as described above, triggered by an operation (selection of the guidance voice) from the administrator HB on the operation unit 326. Then, the guidance voice is emitted, and the acoustic signal S is transmitted from the signal line 13 to the management terminal 14. That is, the acoustic signal S is supplied in parallel to both the sound emitting device 34 and the management terminal 14. Therefore, each time the guidance voice is emitted by the sound emitting device 34, an acoustic signal S containing the identification information D of the content C related to the guidance voice is transmitted to the management terminal 14 by wire. However, it is also possible to transmit the acoustic signal S wirelessly (for example, short-range wireless communication) from the voice guidance device 12 to the management terminal 14.

The trigger for supplying the acoustic signal S to the sound emitting device 34 and the management terminal 14 is not limited to the operation from the administrator HB to the operation unit 326. For example, a configuration in which an acoustic signal S is supplied to the sound emitting device 34 and the management terminal 14 when a preset time (for example, a scheduled time when the vehicle M arrives at a specific point) arrives, or installed in the vehicle M. A configuration can also be adopted in which the sound signal S is supplied to the sound emitting device 34 and the management terminal 14 when the detector (sensor) detects the arrival of the vehicle M at a specific point.

As described above, in the first embodiment, since the sound signal S obtained by synthesizing the sound signal SA of the guidance sound and the sound signal SB of the identification information D is generated by the signal generation device 200, the sound for the sound emitting device 34 is generated. It is possible to emit a guidance sound by supplying the signal S and to use the content C specified by the identification information D in the acoustic signal S. Further, among the original acoustic signals S0, the acoustic signal SA in which the acoustic component of the utilization band BA on the low frequency side is suppressed from the upper limit value F of the reproduction band B0 by the sound emitting device 34 and the acoustic component in the utilization band BA using the identification information D are used. Since the acoustic signal S is generated by synthesizing with the acoustic signal SB contained as There is an advantage that the identification information D can be extracted from the signal S with high accuracy.

Further, the acoustic signal SB containing the acoustic component of the identification information D among the original acoustic signals S0 is suppressed to a sound pressure level (volume) sufficiently lower than that of the acoustic signal SA. Therefore, it is difficult for the user HA who listens to the guidance voice to perceive the acoustic component of the acoustic signal SB (the possibility that the user HA perceives an audible discomfort by listening to the acoustic component of the acoustic signal SB is reduced). There are also advantages.

<Management terminal 14>
FIG. 6 is a configuration diagram of the management terminal 14. The management terminal 14 is, for example, a portable or stationary communication terminal such as a mobile phone or a smartphone used by the administrator HB, and operates with the control unit 51, the storage unit 52, and the communication unit 53 as illustrated in FIG. A unit 54 and a receiving unit 55 are provided. The communication unit 53 communicates with the information providing device 16 via the communication network 18. The operation unit 54 is an input device that accepts operations by the administrator HB.

The storage unit 52 is a known recording medium such as a magnetic recording medium or a semiconductor recording medium, and stores a program executed by the control unit 51 and various data used by the control unit 51. The storage unit 52 of the first embodiment stores identification information (hereinafter referred to as “guidance identification information”) G for uniquely identifying a guidance target for guidance using the management terminal 14. The receiving unit 55 receives the acoustic signal S supplied by wire from the reproduction processing unit 32 of the voice guidance device 12 via the signal line 13.

The control unit 51 is composed of a processing device such as a CPU, and functions as an information extraction unit 512 and a provision instruction unit 514 by executing a program stored in the storage unit 52.

The information extraction unit 512 extracts the identification information D from the acoustic signal S received by the reception unit 55. Specifically, the information extraction unit 512 extracts the acoustic component of the utilization band BA containing the identification information D from the acoustic signal S by, for example, a high frequency pass filter, and the diffusion code used for the diffusion modulation of the identification information D. The identification information D is extracted by passing through a matching filter having the above as a coefficient. When the sound pressure level of the acoustic signal SB falls below -80 dB with reference to the guidance voice of the acoustic signal SA (0 dB), for example, a noise component added during transmission via the signal line 13 and the voice guidance device 12 and management. Due to noise components such as thermal noise peculiar to the terminal 14, it becomes difficult for the information extraction unit 512 to extract the identification information D from the acoustic signal S with high accuracy. In the first embodiment, as described above, since the sound pressure level of the acoustic signal SB is set to −80 dB or more with respect to the guidance voice, there is an advantage that the identification information D can be extracted from the acoustic signal S with high accuracy.

The provision instruction unit 514 generates the provision instruction P of the content C specified by the identification information D extracted by the information extraction unit 512. Specifically, the provision instruction unit 514 generates a provision instruction P including the identification information D extracted from the acoustic signal S by the information extraction unit 512 and the guidance identification information G stored in the storage unit 52, and the communication unit 53. To the information providing device 16. The extraction of the identification information D by the information extraction unit 512 and the generation of the provision instruction P by the provision instruction unit 514 are executed each time the acoustic signal S is received from the reproduction processing unit 32 of the voice guidance device 12. As described above, the reproduction processing unit 32 supplies the acoustic signal S in parallel to the sound emitting device 34 and the management terminal 14. Therefore, for each sound of the guidance voice by the sound emitting device 34, the extraction of the identification information D of the content C related to the guidance voice and the generation of the provision instruction P of the content C specified by the identification information D are executed. Will be done.

<Mobile terminal 20>
FIG. 7 is a configuration diagram of any one mobile terminal 20. As illustrated in FIG. 7, the mobile terminal 20 includes a control unit 61, a storage unit 62, a communication unit 63, an operation unit 64, a reproduction unit 65, and an imaging unit 66. The storage unit 62 is a known recording medium such as a magnetic recording medium or a semiconductor recording medium, and stores a program executed by the control unit 61 and various data used by the control unit 61. For example, identification information (hereinafter referred to as "terminal identification information") T for uniquely identifying the mobile terminal 20 is stored in the storage unit 62. The operation unit 64 is an input device that accepts operations by the user HA.

The communication unit 63 communicates with the information providing device 16 via the communication network 18. For example, the communication unit 63 receives the distribution information Q including the content C related to the guidance voice from the information providing device 16. The reproduction unit 65 reproduces the content C provided by the information providing device 16. Specifically, a display device (for example, a liquid crystal display panel) for displaying the image of the content C and a sound emitting device (for example, a speaker or headphones) for emitting the sound of the content C are used as the reproduction unit 65.

The control unit 61 is composed of a processing device such as a CPU, and functions as a reproduction control unit 612 and an information acquisition unit 614 by executing a program stored in the storage unit 62. The reproduction control unit 612 causes the reproduction unit 65 to reproduce the content C included in the distribution information Q received from the information providing device 16. On the other hand, the information acquisition unit 614 acquires the guidance identification information G provided at the place where the guidance voice is emitted (that is, in the vehicle M).

In the first embodiment, the information image X is installed in the vehicle M to be guided. For example, the information image X is printed on a printed matter such as an advertisement attached in the vehicle M. The information image X is an optically readable plan view image (for example, a QR code (registered trademark)) representing the guidance identification information G unique to the guidance target. The image pickup unit 66 of FIG. 7 is configured to include, for example, an image pickup element capable of capturing an image, and captures an information image X in response to an instruction from the user HA to the operation unit 64. The information acquisition unit 614 identifies the guidance identification information G by demodulating the information image X captured by the imaging unit 66, and communicates a registration request R including the guidance identification information G and the terminal identification information T of the mobile terminal 20. It is transmitted from the unit 63 to the information providing device 16. The registration request R is a signal requesting that the mobile terminal 20 be registered (so to speak, check-in) as the provision target of the content C related to the guidance voice of the guidance target specified by the guidance identification information G. Since the guidance identification information G of any one guidance target is provided only in the place where the guidance voice of the guidance target is emitted, the registration request R including the guidance identification information G of the specific guidance target is requested. It is presumed that the transmitted mobile terminal 20 is located at a place (for example, in the vehicle M) where the guidance voice of the guidance target is emitted.

<Information providing device 16>
FIG. 8 is a configuration diagram of the information providing device 16. The information providing device 16 is, for example, a server device (typically a web server) connected to a communication network 18, and includes a control unit 72, a storage unit 74, and a communication unit 76 as illustrated in FIG. .. The communication unit 76 communicates with each of the mobile terminal 20 and the management terminal 14 via the communication network 18. The communication unit 76 of the first embodiment receives the provision instruction P transmitted by the management terminal 14 and the registration request R transmitted by the mobile terminal 20 via the communication network 18. The storage unit 74 is a known recording medium such as a magnetic recording medium or a semiconductor recording medium, and stores a plurality of contents C and registration information E. As illustrated in FIG. 8, each of the plurality of contents C (C11, C12, ...) Corresponds to the identification information D (D11, D12, ...) Unique to the content C and the content C. Guidance identification information G (G1, G2, ...) Unique to the guidance target (vehicle M) to which the guidance voice is emitted is added.

The registration information E specifies the mobile terminal 20 to which the content C related to the guidance voice of each guidance target is provided. Specifically, as illustrated in FIG. 8, the registration information E provides guidance identification information G (G1, G2, ...) Unique to the guidance target and content C related to the guidance voice of the guidance target. It is a data table corresponding to the terminal identification information T (T11, T12, ...) Of one or more target mobile terminals 20.

The control unit 72 is composed of a processing device such as a CPU, and functions as a registration processing unit 722 and an information distribution unit 724 by executing a program stored in the storage unit 74. The registration processing unit 722 updates the registration information E in response to the registration request R transmitted from the mobile terminal 20. Specifically, the registration processing unit 722 refers to the terminal identification information T designated by the registration request R with respect to the guidance identification information G specified by the registration request R among the plurality of guidance identification information G included in the registration information E. To correspond. That is, the mobile terminal 20 of the terminal identification information T specified in the registration request R is registered as the distribution target of the content C to be guided specified by the guidance identification information G in the registration request R.

The information distribution unit 724 generates distribution information Q and transmits it from the communication unit 76 to the mobile terminal 20. Specifically, the information distribution unit 724 registers the content C of the identification information D specified by the provision instruction P received from the management terminal 14 in the registration information E for the guidance identification information G specified by the provision instruction P. It is transmitted to each mobile terminal 20 (that is, the distribution target of the content C registered for the guidance target). As described above, it is presumed that the mobile terminal 20 that has transmitted the registration request R including the guidance identification information G of the specific guidance target is located at a place where the guidance voice of the guidance target is emitted. Therefore, the content C corresponding to the guidance voice of the guidance target is provided to the mobile terminal 20 located at the place where the guidance voice of the guidance target is emitted.

<Overall operation>
FIG. 9 is an explanatory diagram of the overall operation of the information providing system 100. The user HA who got on the vehicle M instructs to capture the information image X installed in the vehicle M by appropriately operating the operation unit 64 of his / her mobile terminal 20. When the imaging unit 66 captures the information image X in response to the instruction from the user HA (SA1), the information acquisition unit 614 of the mobile terminal 20 receives the guidance identification information G specified from the information image X and the mobile terminal 20. A registration request R including the terminal identification information T of the above is transmitted from the communication unit 63 to the information providing device 16 (SA2).

When the communication unit 76 receives the registration request R transmitted by the mobile terminal 20, the registration processing unit 722 of the information providing device 16 receives the registration request R for the guidance identification information G specified by the registration request R in the registration information E. Register the terminal identification information T specified in (SA3). That is, the mobile terminal 20 in the vehicle M is added as a distribution target of the content C related to the guidance voice emitted in the vehicle M which is the guidance target.

On the other hand, the reproduction processing unit 32 of the voice guidance device 12 supplies the acoustic signal S of the guidance voice selected by the administrator HB in the operation to the operation unit 326 to the sound emitting device 34 (SA4), and also via the signal line 13. It is transmitted to the management terminal 14 (SA5). A guidance voice is emitted from the sound emitting device 34 by the supply of the acoustic signal S, and the user HA located in the vehicle M listens to the guidance voice. On the other hand, the information extraction unit 512 of the management terminal 14 extracts the identification information D of the content C related to the guidance voice by analyzing the acoustic signal S supplied from the reproduction processing unit 32 (SA6). The provision instruction unit 514 transmits the provision instruction P including the identification information D extracted by the information extraction unit 512 and the guidance identification information G held by the storage unit 52 from the communication unit 53 to the information providing device 16 (SA7).

When the communication unit 76 receives the provision instruction P transmitted from the management terminal 14, the information distribution unit 724 of the information providing device 16 identifies the plurality of contents C stored in the storage unit 74 as specified by the provision instruction P. The content C corresponding to the information D is specified (SA8), and one or more terminal identification information T corresponding to the guidance identification information G specified in the provision instruction P (that is, the content C to be guided is registered as a distribution target). The mobile terminal 20) is specified from the registration information E (SA9). Then, the information distribution unit 724 transmits the distribution information Q including the content C specified in step SA8 from the communication unit 76 to the mobile terminal 20 of each terminal identification information T specified in step SA9 (SA10).

When the communication unit 63 receives the distribution information Q transmitted from the information providing device 16, the reproduction control unit 612 of the mobile terminal 20 causes the reproduction unit 65 to reproduce the content C included in the distribution information Q (SA11). As can be understood from the above explanation, in the vehicle M which is the guidance target, the guidance voice regarding the guidance target is sequentially emitted from the sound emitting device 34 in the vehicle M, and the guidance voice is emitted for each sound of the guidance voice. The content C related to the guidance voice is sequentially reproduced by the reproduction unit 65 of the mobile terminal 20. That is, the content C related to the guidance voice is sequentially reproduced on the mobile terminal 20 in conjunction with the sound emission of the guidance voice. Therefore, the user HA in the vehicle M can sequentially listen to the guidance voice and sequentially view the content C related to the guidance voice.

The registration processing unit 722 of the information providing device 16 requires that a predetermined time (time expected to be located in the vehicle M) has elapsed since the terminal identification information T was added to the registration information E. The terminal identification information T is deleted from the registration information E. That is, the mobile terminal 20 of the terminal identification information T is excluded from the transmission target of the distribution information Q. Therefore, the distribution information Q is not transmitted to the mobile terminal 20 of the user HA who got off the vehicle M. The conditions for deleting the terminal identification information T from the registration information E are not limited to the above example (elapse of a predetermined time). For example, the terminal identification information T of the mobile terminal 20 may be deleted from the registration information E, triggered by a deletion request transmitted from the mobile terminal 20 to the information providing device 16 in response to an operation from the user HA to the operation unit 64. It is possible.

As described above, in the first embodiment, the provision instruction P of the content related to the guidance voice is generated for each sound of the guidance voice by the sound emitting device 34, and the mobile terminal registered as the distribution target in the registration information E. The distribution information Q of the content C related to the provision instruction P is transmitted to the 20. Therefore, it is possible to reproduce the content C related to each guidance voice to be guided on the mobile terminal 20 in conjunction with the sound emission of the guidance voice.

Further, in the first embodiment, when the information providing device 16 receives the registration request R including the guidance identification information G that can be acquired at the place where the guidance voice is emitted (inside the vehicle M) from the mobile terminal 20, the said person concerned. The mobile terminal 20 is registered as a target for providing the content C related to the guidance voice. Therefore, it is possible to limit the provision target of the content C related to the guidance voice to the mobile terminal 20 located at the place where the guidance voice is emitted. In the first embodiment, in particular, the registration request R including the guidance identification information G acquired by the mobile terminal 20 by imaging the information image X installed at the place where the guidance voice is emitted is transmitted from the mobile terminal 20. There is an advantage that the configuration and procedure for causing the mobile terminal 20 to acquire the guidance identification information G are simplified.

Further, in the first embodiment, the guidance sound is emitted from the sound emitting device 34 by supplying the acoustic signal S, while the identification information D contained as an acoustic component in the acoustic signal S is extracted by the management terminal 14. After that, the provision instruction P is generated. That is, the acoustic signal S is shared between the sound of the guidance voice by the sound emitting device 34 and the extraction of the identification information D by the management terminal 14. Therefore, it is possible to easily link the sound generation of the guidance voice by the sound emitting device 34 and the transmission of the provision instruction P (and thus the provision of the content C to the mobile terminal 20) by the provision instruction unit 514.

By the way, as a configuration for extracting the identification information D contained in the acoustic signal S by the management terminal 14, for example, the sound emitted from the sound emitting device 34 is collected from the acoustic signal collected by the management terminal 14. A configuration for extracting the identification information D (hereinafter referred to as “inverse proportion”) can also be assumed. However, in inverse proportion, noise is superimposed on the sound on the path from the sound emitting device 34 to the management terminal 14, and as a result, it may be difficult for the management terminal 14 to extract the identification information D with high accuracy. .. In the first embodiment, since the acoustic signal S containing the identification information D is transmitted from the voice guidance device 12 to the management terminal 14 by wire, the influence of noise on the acoustic signal S is reduced. Therefore, according to the first embodiment, there is an advantage that the identification information D can be extracted from the acoustic signal S with high accuracy as compared with the inverse proportion. Since the sound pressure level of the acoustic signal SB required for extracting the identification information D is reduced, it can be paraphrased that it is difficult for the user HA who listens to the guidance voice to perceive the acoustic component of the acoustic signal SB. However, the above description does not mean to exclude the inverse proportion from the scope of the present invention, and the inverse proportion can be included in the scope of the present invention.

<Second Embodiment>
A second embodiment of the present invention will be described. For the elements whose actions and functions are the same as those in the first embodiment in each of the embodiments exemplified below, the reference numerals used in the description of the first embodiment will be diverted and detailed description of each will be omitted as appropriate.

FIG. 10 is a configuration diagram of the mobile terminal 20 according to the second embodiment. As can be understood from FIG. 10, the mobile terminal 20 of the second embodiment has a configuration in which the imaging unit 66 of the first embodiment is replaced with the wireless receiving unit 67.

In the second embodiment, the wireless transmission unit 300 is installed in the vehicle M. The wireless transmission unit 300 is a communication device that periodically transmits the guidance identification information G of the guidance target (vehicle M) to the surroundings by short-range wireless communication. The wireless receiving unit 67 of the mobile terminal 20 located in the vehicle M receives the guidance identification information G transmitted from the wireless transmitting unit 300. The specific communication method of short-range wireless communication executed between the wireless transmission unit 300 and the wireless reception unit 67 is arbitrary, but wireless communication using electromagnetic waves such as radio waves and infrared rays as a transmission medium and air vibration are available. Acoustic communication using audio as a transmission medium can be preferably adopted.

The information acquisition unit 614 of the mobile terminal 20 in the second embodiment acquires the guidance identification information G received by the wireless reception unit 67, and the registration request R including the guidance identification information G and the terminal identification information T of the mobile terminal 20. Is transmitted from the communication unit 63 to the information providing device 16. Other configurations and operations in the second embodiment are the same as those in the first embodiment. In the second embodiment, the same effect as in the first embodiment is realized. It is also possible to mount the wireless transmission unit 300 illustrated in FIG. 10 on the management terminal 14.

<Modification example>
Each of the above-exemplified forms can be variously modified. A specific mode of modification is illustrated below. Two or more embodiments arbitrarily selected from the following examples can be appropriately merged to the extent that they do not contradict each other.

(1) In each of the above-described modes, the configuration in which the distribution information Q transmitted from the information providing device 16 to the mobile terminal 20 includes the content C is illustrated, but the content of the distribution information Q is not limited to the above examples. For example, in a configuration in which a plurality of contents C are stored in advance in the storage unit 62 of the mobile terminal 20, the distribution information Q including the identification information D of the contents C specified by the provision instruction P (not including the contents C itself) is information. It is also possible to transmit from the providing device 16 to the mobile terminal 20. The reproduction control unit 612 of the mobile terminal 20 acquires the content C corresponding to the identification information D included in the distribution information Q from the storage unit 62 and causes the reproduction unit 65 to reproduce the content C. As understood from the above description, the distribution information Q in each of the above-described forms is comprehensively expressed as information for reproducing the content C related to the guidance voice on the mobile terminal 20, and the distribution information Q includes the content C. It does not matter whether it is included or not.

(2) The conditions for deleting the terminal identification information T from the registration information E (so to speak, checkout) are optional. For example, as in the example of the second embodiment, in the configuration in which the mobile terminal 20 transmits the registration request R to the information providing device 16 triggered by the communication with the wireless transmission unit 300 (reception of the guidance identification information G), the wireless transmission is performed. When the radio signal from the unit 300 does not reach the mobile terminal 20 (for example, when the reception strength drops below the threshold value), the terminal identification information T of the mobile terminal 20 is requested to be deleted from the registration information E. It is also possible to transmit the deletion request from the mobile terminal 20 to the information providing device 16.

It is assumed that the mobile terminal 20 is equipped with a function of estimating the communication state with the wireless transmission unit 300. A typical example of the communication situation is, for example, the distance from the wireless transmitter 300 estimated according to the reception strength, which is, for example, immediate, near, far, or unknown. The state is determined. In the above configuration, the mobile terminal 20 is deleted from the information providing device 16 when a predetermined time elapses after the communicable state (proximity, within range, out of range) transitions to the uncommunication unknown state. It is also possible to send a request. Further, for example, by analyzing the position of the mobile terminal 20 that is positioned using GPS (Global Positioning System) or short-range radio, it is periodically determined whether or not the mobile terminal 20 is separated from the wireless transmission unit 300. Then, when it is determined that the mobile terminal 20 is separated (for example, when the user HA carrying the mobile terminal 20 is separated from the wireless transmission unit 300 by getting off the vehicle M), the mobile terminal 20 is separated from the information providing device 16. It is also possible to send a deletion request to.

(3) In each of the above-described forms, voice guidance of transportation such as a train or a bus is illustrated, but the guidance target in which the information providing system 100 is used is not limited to the above examples. For example, the same information providing system 100 as in each of the above-described forms is used for voice guidance of a moving body (equipment that accommodates and moves the mobile terminal 20) including a ship or an aircraft in addition to the vehicle M. It is also possible to use the information providing system 100 for voice guidance of various facilities such as exhibition facilities such as museums, accommodation facilities, and commercial facilities. The information providing system 100 can also be used to provide information (for example, evacuation guidance and status notification) when a disaster such as a fire or an earthquake occurs in various facilities.

(4) In each of the above-described embodiments, the configuration in which the voice guidance device 12, the management terminal 14, and the information providing device 16 are separated is illustrated, but a plurality of devices may be integrated / separated, or each function and each device may be used. The relationship is arbitrary. For example, a configuration in which some functions of one of the management terminal 14 and the information providing device 16 are mounted on the other, or a configuration in which the functions of the information providing device 16 and the management terminal 14 are mounted on a single device can be adopted. It is also possible to mount the function of the voice guidance device 12 on the management terminal 14 (the management terminal 14 is also used as the voice guidance device 12).

100 ... Information providing system, 200 ... Signal generator, 12 ... Voice guidance device, 14 ... Management terminal, 16 ... Information providing device, 18 ... Communication network, 20 ... Mobile terminal, 32 ... Playback Processing unit, 322 ... Control unit, 324 ... Storage unit, 326 ... Operation unit, 34 ... Sound emitting device, 42 ... Control unit, 422 ... Component suppression unit, 424 ... Modulation processing unit, 426 ... ... mixing processing unit, 44 ... storage unit, 51 ... control unit, 512 ... information extraction unit, 514 ... provision instruction unit, 52 ... storage unit, 53 ... communication unit, 54 ... operation unit, 55 ... Reception unit, 56 ... Sound collection unit, 61 ... Control unit, 612 ... Playback control unit, 614 ... Information acquisition unit, 62 ... Storage unit, 63 ... Communication unit, 64 ... Operation unit, 65 ... playback unit, 66 ... imaging unit, 67 ... wireless reception unit, 72 ... control unit, 722 ... registration processing unit, 724 ... information distribution unit, 74 ... storage unit, 76 ... communication unit ..

Claims (6)

A playback control device installed in a specific location
A plurality of acoustic signals stored in the storage unit of the reproduction control device for different guidance sounds relating to the location, and among the original acoustic signals representing the guidance sounds, the reproduction band of the sound emitting device installed at the location. a first acoustic signal from the upper limit value to suppress acoustic component of bandwidth usage over a predetermined range of the low-frequency side, and a second acoustic signal including the identification information of the content related to the guidance voice as the sound component in said bandwidth usage of the synthesized plurality of acoustic signals, the control supplies an acoustic signal corresponding to the guidance voice selected by the user, and the sound emitting device, to said identification information extractable information extraction unit in the analysis of the acoustic signals A reproduction control device including a unit. The reproduction control device according to claim 1, wherein the second acoustic signal includes identification information of contents to be transmitted to the terminal device. The reproduction control device according to claim 1 or 2, wherein the second acoustic signal includes identification information of contents representing the pronunciation content of the guidance voice. The reproduction control device according to any one of claims 1 to 3, wherein the control unit transmits the acoustic signal to the information extraction unit mounted on a management terminal separate from the reproduction control device by wire. Reproduction control device to be installed in a specific location,
A plurality of acoustic signals stored in the storage unit of the reproduction control device for different guidance sounds relating to the location, and among the original acoustic signals representing the guidance sounds, the reproduction band of the sound emitting device installed at the location. a first acoustic signal from the upper limit value to suppress acoustic component of bandwidth usage over a predetermined range of the low-frequency side, and a second acoustic signal including the identification information of the content related to the guidance voice as the sound component in said bandwidth usage of the synthesized plurality of acoustic signals, supplies a sound signal corresponding to the guidance voice selected by the user, and the sound emitting device, to said identification information extractable information extraction unit in the analysis of the acoustic signal computer Playback control method realized by. The computer of the playback control device installed in a specific place,
A plurality of acoustic signals stored in the storage unit of the reproduction control device for different guidance sounds relating to the location, and among the original acoustic signals representing the guidance sounds, the reproduction band of the sound emitting device installed at the location. a first acoustic signal from the upper limit value to suppress acoustic component of bandwidth usage over a predetermined range of the low-frequency side, and a second acoustic signal including the identification information of the content related to the guidance voice as the sound component in said bandwidth usage of the synthesized plurality of acoustic signals, the control supplies an acoustic signal corresponding to the guidance voice selected by the user, and the sound emitting device, to said identification information extractable information extraction unit in the analysis of the acoustic signals A program that functions as a department.

Images