JP2020053945A - Broadcasting system and information presentation device - Google Patents

Abstract

To improve the reliability of a broadcasting system using a sound watermark.SOLUTION: A broadcasting system includes: a signal processing device 1 for generating a broadcast signal in which identification information is superposed on an acoustic signal by a sound watermark; a broadcasting device 2 for outputting the broadcast signal to a speaker line 3; one or two or more speaker units 4 connected to the speaker line 3 for emitting sound on the basis of the broadcast signal; two or more portable terminal devices 5 for extracting identification information from a sound collection signal obtained by collecting an output sound from the speaker units 4 and making a display output on the basis of the extracted identification information; and an information presentation device 6 connected with the speaker line 3 for extracting the identification information from the broadcast signal and making an information presentation on the basis of the extracted identification information.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a broadcasting system and an information presenting device, and more particularly, to an improvement of a broadcasting system including a speaker and an information presenting device, and an improvement of an information presenting device used in the broadcasting system.

  Audio watermarking is a technology that embeds information into sound waves in the audible frequency band so that it cannot be perceived. Known methods include echo hiding, echo spreading, spread spectrum, and periodic phase modulation. I have.

  2. Description of the Related Art A broadcasting system that transmits identification information along with a broadcast sound to a large number of portable terminal devices existing in a broadcasting space using an audio watermark has been conventionally known (for example, Patent Document 1). The system described in Patent Literature 1 synthesizes identification information with guidance voice by using a voice watermark, and the guidance information and the identification information are transmitted as sound waves to terminal devices such as mobile phones and smartphones. The terminal device extracts the identification information from the collected sound signal, acquires information related to the identification information via the Internet or the like, and displays the information.

JP-A-2006-75890

  In an audio watermark broadcast system, for example, in a noisy environment such as a crowded public space, a situation occurs in which a person can hear a broadcast sound, but a terminal device cannot extract identification information. I do. In general, even in a noisy environment, a person can select and listen only to a sound component of interest, and such selective listening is called a cocktail party effect. On the other hand, in the arithmetic processing for extracting identification information from the collected sound signal of the terminal device, the same selection processing cannot be performed, and the identification information cannot be extracted in a noise environment. That is, even in a noise environment that is permissible as a broadcasting system, there is a possibility that information transmission using an audio watermark may fail, and there is a problem that reliability is lacking.

  For example, it is conceivable to use an audio watermark when transmitting disaster information such as a fire or tsunami to a terminal device of a foreigner or a hearing-impaired person. However, in a situation where disaster information is transmitted, there is a high possibility that the noise level is higher than in normal times, and there is a problem that the possibility of failure in information transmission by a voice watermark increases.

  Therefore, it is conceivable to install a signage device in the broadcasting space to perform audio watermark broadcasting and display output. However, when a broadcast device and a signage device are connected via a communication network, there is a problem that display cannot be performed if a failure occurs in the communication network. For example, if the communication network is stopped due to a power failure at the time of a fire, the display output by the signage device cannot be performed. In general, broadcast systems used for emergency broadcasts often have high reliability, such as the use of fire-resistant cables for speaker wires, whereas communication networks have such reliability. Often not. On the other hand, if the signage device and the broadcasting device are to be connected by a highly reliable dedicated line, there is a problem that the installation cost is significantly increased.

  Furthermore, not only the audio watermark broadcasting system for performing display output on the portable terminal device but also an information presenting device such as a signage device is installed to present information related to broadcast contents, thereby improving facility user convenience. A similar problem has been encountered when trying to improve it.

  The present invention has been made in view of the above circumstances, and has as its object to improve the convenience or reliability of a broadcasting system. It is another object of the present invention to improve the convenience or reliability of an information presentation device applied to a broadcasting system.

  A broadcast system according to a first aspect of the present invention provides a broadcast apparatus that outputs a broadcast signal on which identification information of information related to broadcast content is superimposed to a speaker line, and is connected to the speaker line and emits sound based on the broadcast signal. One or more speaker units to be connected to the speaker line, extract the identification information from the broadcast signal, and, based on the extracted identification information, information related to broadcast content emitted from the speaker unit. And an information presenting device for presenting the information.

  By employing the above configuration, it is possible to output a broadcast sound from the speaker unit based on the broadcast signal and to present information related to the broadcast content in the information presentation device. For this reason, the speaker unit and the information presentation device can report information related to each other.

  The information presentation device extracts the identification information from the broadcast signal and presents the information based on the extracted identification information. Therefore, it is possible to present information related to the broadcast content emitted from the speaker unit without being affected by the noise environment in the broadcast space.

  Further, by connecting the information presenting device to the speaker line, high reliability of information transmission to the information presenting device can be ensured. Also, the installation cost of the information presentation device can be significantly reduced as compared with the case where dedicated wiring for the information presentation device is provided.

  In addition, the speaker unit and the information presenting device are connected to the same speaker line and operate based on the same broadcast signal, so that the information presenting device presents information that is not related to the broadcast content due to a wiring error or the like. Can be prevented.

  A broadcast system according to a second aspect of the present invention, in addition to the above-described configuration, further includes extracting the identification information from a sound pickup signal obtained by picking up an output sound from the speaker unit, and broadcasting contents based on the extracted identification information. Including two or more mobile terminal devices for presenting information related to the mobile terminal device, the mobile terminal device has attribute information predetermined for each of the terminal devices, and the identification information is notification information according to the attribute information. A conversion table for associating the identification information with the notification information, using the conversion table, present the notification information, the information presentation device, the information presenting device, the identification information of two or more predetermined A conversion table is provided for associating with the broadcast information, the conversion table is used to convert the identification information into the two or more broadcast information, and the broadcast information is presented.

  With such a configuration, each mobile terminal device can present information according to the user of each mobile terminal device by presenting notification information according to the terminal attribute, while the information presentation device has By presenting notification information according to two or more terminal attributes, information can be presented to an arbitrary target person.

  A broadcast system according to a third aspect of the present invention, in addition to the above configuration, further comprises extracting the identification information from a sound pickup signal obtained by picking up an output sound from the speaker unit, and broadcasting content based on the extracted identification information. A conversion table for associating the identification information with broadcast information corresponding to one language predetermined for each of the terminal devices, including two or more mobile terminal devices that present information related to the terminal device. Using the conversion table, converting the identification information into the notification information, and presenting the notification information, wherein the information presentation device converts the identification information into notification information corresponding to two or more predetermined languages. And a conversion table for associating the identification information with notification information corresponding to the two or more languages, and presenting the notification information.

  With such a configuration, each mobile terminal device can present information according to the user by presenting notification information according to the language desired by the user, while the information presenting device can provide information according to the user. By presenting the notification information according to the above-mentioned languages, it is possible to present information to an arbitrary target person.

  A broadcasting system according to a fourth aspect of the present invention includes, in addition to the above configuration, two or more information presenting apparatuses, and the information presenting apparatus holds a conversion table that associates the identification information with broadcast information corresponding to an installation location. The identification information is converted into broadcast information using the conversion table, and the broadcast information is presented.

  By employing the above configuration, the information presentation device can present the notification information according to the installation location. For example, when presenting a disaster warning, an evacuation route according to the installation location can be presented.

  A broadcast system according to a fifth aspect of the present invention, in addition to the above-described configuration, is configured such that the portable terminal device acquires the conversion table via a wireless communication network and holds the conversion table in the portable terminal device in advance.

  By adopting the above configuration, it is possible to easily obtain the conversion table, and by obtaining and holding the conversion table in advance, without being affected by the wireless communication environment when collecting broadcast sound, The identification information can be converted into notification information.

  According to a sixth aspect of the present invention, there is provided an information presenting apparatus, comprising: a connecting unit that connects to a speaker line to which a plurality of speakers are connected, through which a broadcast signal on which identification information of information related to broadcast content flows is superimposed; Extraction means for extracting the identification information from the broadcast signal to be received, and presentation means for presenting information related to the broadcast content emitted from the speaker unit based on the extracted identification information.

  ADVANTAGE OF THE INVENTION According to this invention, the convenience or reliability of a broadcast system can be improved. Further, the convenience or reliability of the information presentation device applied to the broadcast system can be improved.

FIG. 1 is a diagram illustrating a configuration example of a broadcasting system according to a first embodiment of the present invention. FIG. 2 is a diagram schematically illustrating an installation example of a broadcasting system 100. FIG. 4 is a diagram illustrating an example of a method of connecting a speaker unit 4 and an information presentation device 6 to a speaker line 3. FIG. 4 is a diagram illustrating an example of a conversion table Tb. FIG. 2 is a block diagram illustrating a configuration example of the mobile terminal device 5 in FIG. 1. 5 is a flowchart illustrating an example of an operation of the mobile terminal device 5. FIG. 2 is a block diagram illustrating a configuration example of an information presentation device 6 in FIG. 1. 5 is a flowchart illustrating an example of an operation of the information presentation device 6. FIG. 10 is a diagram illustrating an example of conversion tables Tb1 to Tb3 according to the second embodiment of the present invention.

Embodiment 1 FIG.
(1) Schematic Configuration of Broadcast System 100 FIG. 1 is a diagram showing a configuration example of a broadcast system according to the first embodiment of the present invention. The broadcasting system 100 includes a signal processing device 1, a broadcasting device 2, a speaker line 3, a speaker unit 4, a portable terminal device 5, an information presenting device 6, and a data server 7.

  The broadcast system 100 is a premises broadcast system installed in a facility having a large number of facility users, and is installed in public facilities such as stations and airports, large-scale facilities such as concert halls, schools, buildings, and other facilities. I have. By using such a broadcasting system 100, audio broadcasting is performed to a predetermined broadcasting space in a facility, and various kinds of information are provided as perceptible broadcasting sounds to facility users in the broadcasting space. Can be.

  Further, in the broadcast system 100, a broadcast signal in which identification information is superimposed on an audio signal by an audio watermark is generated, and notification information corresponding to the identification information is presented in the portable terminal device 5. Similarly, also in the information presentation device 6 installed in the broadcast space, the notification information corresponding to the identification information is presented. Further, the mobile terminal device 5 presents information related to broadcast content in one predetermined language, whereas the information presentation device 6 presents information related to broadcast content in two or more languages. You.

  Here, the presentation of information means displaying visual information on a display device, outputting auditory information with a speaker, outputting changes in vibration, temperature, and humidity with a tactile device, and smelling substances with an olfactory device. And the like. The broadcast content indicates the content of the audio signal.

  The content of the acoustic signal corresponds to, for example, an announcement, a signature sound having a specific meaning, music representing a specific state, and the like.

  As information related to the broadcast content, for example, in the case of a broadcast indicating that the broadcast content is a fire, 1) display of a fire mark, 2) text information indicating that the fire is a foreign language such as English or Chinese 3) Voice that tells that it is a fire in the language of a foreign language, 4) Heat a tactile device that gets hot in the event of a fire, 5) Release a burning smell from an olfactory device in the event of a fire, etc. Applicable.

A) Signal processing device 1
The signal processing device 1 is a device that superimposes identification information on an audio signal using an audio watermark and generates a broadcast signal. The acoustic signal and the identification signal are generated by an external device (not shown) and input to the signal processing device 1. The generated broadcast signal is output to the broadcast device 2.

  The sound signal is a signal indicating sound information including BGM reproduced from a music recording medium such as a CD or a voice message input through a microphone. For example, an audible frequency indicating sound information as a sound pressure change on a time axis. Band signals are used.

  The identification information is information associated with the notification information. The broadcast information is information predetermined so as to be related to the broadcast content, and the identification information is superimposed on the audio signal so that the broadcast information is related to the broadcast content. The notification information is information composed of characters or images, and is various information that a facility operator reports to a facility user, such as a disaster warning such as a fire, an earthquake, a typhoon, and a tsunami, and train and aircraft operation information. The notification information displayed and output by the mobile terminal device 5 and the information presentation device 6 is selected based on the identification information from two or more pieces of notification information constituting a conversion table held by each device.

  Speech watermarking is a well-known technology that embeds information in an audio signal using human auditory characteristics so that humans cannot perceive it. Echo hiding, echo spreading, spread spectrum, periodic phase modulation The law is known. The broadcast signal generated by such an audio watermark is a signal in an audible frequency band, and when the speaker unit 4 emits sound, the listener can perceive acoustic information, but cannot perceive identification information. Is a signal that cannot be used. It is desirable that the broadcast signal is a signal that is not easily perceived that the identification information is superimposed.

B) Broadcasting device 2
The broadcast device 2 is a device that amplifies a broadcast signal input from the signal processing device 1 and outputs the amplified broadcast signal to the speaker line 3. In addition, the signal processing device 1 and the broadcasting device 2 may be integrated, and the broadcasting device 2 may be configured to have the function of the signal processing device 1 built-in.

C) Speaker line 3
The speaker line 3 is a transmission line for transmitting a broadcast signal from the broadcasting device 2 to the speaker unit 4, and is laid in the target facility. One broadcasting device 2 is connected to the speaker line 3 and one or more speaker units 4 are connected thereto. Further, one or more information presentation devices 6 are connected to the speaker line 3.

  It is desirable to use a fire-resistant cable for the speaker line 3. Since the signal lines of the fire-resistant cable are covered with a fire-resistant layer, insulation can be ensured even when a fire occurs. Broadcasting systems are also used for emergency broadcasts in the event of a disaster, so fireproof cables that function even in the event of a fire are often used, and high reliability is ensured. By connecting not only the speaker unit 4 but also the information presenting device 6 to the speaker line 3, the display output of the information presenting device 6 can ensure the same high reliability as the broadcast sound output of the speaker unit 4.

D) Speaker unit 4
The speaker unit 4 receives a broadcast signal from the broadcast device 2 via the speaker line 3 and outputs the broadcast signal to a broadcast space as a broadcast sound. That is, a broadcast signal input as an electric signal is converted into a sound wave, and is emitted to a broadcast space as a broadcast sound. The speaker unit 4 is attached to, for example, a ceiling or a wall of a broadcast space. In addition, one or more speaker units 4 are installed according to the size, shape, noise environment, and the like of the broadcast space so that the broadcast sound can be heard at an arbitrary place in the broadcast space.

E) Portable terminal device 5
The mobile terminal device 5 is a portable small terminal owned by the facility user, and for example, a mobile phone, a smartphone, or the like is used. The mobile terminal device 5 has a microphone, can collect broadcast sound from the speaker unit 4, and can extract identification information from the collected sound signal. The extracted identification information is converted into notification information using the conversion table, and displayed on the display unit of the mobile terminal device 5.

  The conversion table is obtained from the data server 7 via the communication network N, and is stored in the mobile terminal device 5 in advance. The mobile terminal device 5 has a wireless communication function and can be connected to the communication network N via a wireless line with the access point AP. Therefore, the conversion table can be obtained from the data server 7 via the communication network N.

F) Information presentation device 6
The information presentation device 6 is a display device that is installed so as to be visible from within the broadcast space. Do. In addition, one or more information presentation devices 6 are installed according to the size, shape, and the like of the broadcast space so that the information presenting device 6 can be used from more places in the broadcast space. As the information presentation device 6, for example, a digital signage device can be used. The digital signage device is an electronic bulletin board that includes a display device that is larger than the mobile terminal device 5, for example, an LED panel and an organic EL panel, and is visible from a remote place. When the power supply from the commercial power supply is stopped in an emergency, the power supply from the emergency power supply allows the apparatus to operate for a predetermined time, for example, 30 minutes.

  The information presentation device 6 is connected to the speaker line 3, can receive a broadcast signal on the speaker line 3 without intervening the speaker unit 4, and can extract identification information from the received signal. The extracted identification information is converted into notification information using the conversion table, and displayed on the display unit of the information presentation device 6. The conversion table is obtained from the data server 7 via the communication network N, and is stored in the information presentation device 6 in advance.

G) Data server 7
The data server 7 is a data server connected to a communication network N such as a LAN and the Internet, and provides a conversion table based on a data acquisition request from the portable terminal device 5 and the information presentation device 6.

(2) Installation Example of Broadcast System 100 FIG. 2 is a diagram schematically illustrating an installation example of the broadcast system 100. In the broadcast space R, speaker units 4a and 4b are installed on the ceiling, and a speaker unit 4c is installed on the wall surface. The three speaker units 4a to 4c allow the user to listen to the broadcast sound at an arbitrary position in the broadcast space R. Is configured. The information presenting device 6a is installed on the left wall surface of the broadcast space R, and the information presenting device 6b is erected on the right floor. A large number of facility users are present in the broadcast space R, and each portable terminal device 5 is carried, except for some facility users.

(3) Connection Method with Speaker Line 3 FIG. 3 is a diagram showing an example of a connection method of the speaker unit 4 and the information presenting device 6 to the speaker line 3, and a high-impedance transmission line is adopted as the speaker line 3. An example of the case is shown.

  The high-impedance transmission line is a transmission line that connects the broadcasting device 2, the speaker unit 4, and the information presenting device 6 with high impedance, and transmits a signal at a high voltage. , The power loss at the time of transmission is small, and the wiring length can be lengthened. Further, more speaker units 4 and information presenting devices 6 can be connected. For this reason, it is desirable to use a high impedance transmission line for the speaker line 3.

  The speaker line 3 is composed of normal-phase (HOT) and negative-phase (COLD) signal lines 3a and 3b. The broadcast signal is supplied by the broadcast device 2 as a broadcast signal of, for example, 100 V, and is used after the voltage is reduced through a transformer for impedance matching.

  The speaker unit 4 includes a transformer 40, an amplifier circuit 41, and a speaker 42. The transformer 40 is connected to the speaker line 3 and lowers the voltage of the broadcast signal. The low-voltage broadcast signal is amplified by the amplifier circuit 41, converted into a sound wave by the speaker 42, and output to the broadcast space R as a broadcast sound.

  The information presentation device 6 is connected to the speaker line 3 via the connection adapter 60. The connection adapter 60 includes a transformer 601 and a variable resistor 602. The broadcast signal whose voltage is reduced by the transformer 601 and whose volume is adjusted by the variable resistor 602 is input to a microphone input terminal of the information presentation device.

(4) Conversion table Tb
FIG. 4 is a diagram illustrating an example of the conversion table Tb. The conversion table Tb is a data table used by the mobile terminal device 5 and the information presentation device 6 to convert identification information into notification information.

  For example, the identification information "0001" is associated with the notification information "A tsunami is coming. Please escape to the evacuation center in Nishiyama." . Please wait without impatience. " For this reason, when the identification information “0001” is acquired, the portable terminal device 5 and the information presentation device 6 display the notification information “Tsunami is coming. Please escape to the evacuation site in Nishiyama” on the display screen.

  In the illustrated conversion table Tb, the identification information is configured by a four-digit number, and the notification information is configured by a Japanese message. Similarly, it is also possible to use a conversion table Tb of another language, that is, a conversion table Tb in which the notification information is composed of a message of another language having the same content. In the broadcasting system 100, two or more conversion tables Tb having different languages, for example, conversion tables Tb of Japanese, English, Chinese, Korean, French, Italian, and Spanish can be used.

  In the mobile terminal device 5 intended for a specific user, a conversion table corresponding to the language used by the user is used. That is, any one of a large number of conversion tables Tb having different languages is selectively used, and the notification information is displayed in a language corresponding to the user. On the other hand, in the information presentation device 6 intended for a large number of facility users, a conversion table Tb of two or more predetermined languages is selectively used from a large number of conversion tables Tb having different languages. For example, a conversion table Tb of Japanese, English and Chinese, which is considered to have relatively many users, is used, and the notification information of these three languages is displayed simultaneously or sequentially.

  The conversion table Tb is downloaded in advance from the data server 7 via the communication network N. The mobile terminal device 5 acquires the conversion table Tb via a wireless line and holds the conversion table Tb in the mobile terminal device 5. Similarly, the information presentation device 6 also acquires the conversion table Tb via wireless communication or a wired line, and holds the conversion table Tb in the information presentation device 6.

  The mobile terminal device 5 is configured to download only the conversion table Tb of the specified language, or to selectively use only the conversion table Tb of the specified language after downloading all the conversion tables Tb. You. The language is specified by a user operation or based on the terminal attributes of the mobile terminal device 5. In general, the mobile terminal device 5 has a language to be used specified at the time of initial setting, and holds it as a terminal attribute. The conversion table Tb to be used can be automatically determined based on such terminal attributes.

  Note that the information presentation device 6 and the portable terminal device 5 can be configured to use different conversion tables Tb. For example, the information presentation device 6 may be configured to display a more simplified message than the mobile terminal device 5.

(5) Configuration and operation of the mobile terminal device 5 FIG. 5 is a block diagram showing one configuration example of the mobile terminal device 5 of FIG. The mobile terminal device 5 includes a terminal attribute storage unit 50, a microphone 51, an identification information extraction unit 52, an identification information storage unit 53, a table acquisition unit 54, a table storage unit 55, a conversion unit 56, and a display unit 57.

  The terminal attribute storage unit 50 is a storage unit that stores attribute information of the mobile terminal device 5, and stores a language used in the mobile terminal device 5 as one of the attribute information. The language used is specified by the user at the time of initial setting, for example, and is held in the terminal attribute storage unit 50.

  The microphone 51 is a sound collecting unit that converts sound pressure into an electric signal, and collects a broadcast sound, that is, an output sound from the speaker unit 4, and generates a sound collecting signal. The generated sound pickup signal is output to the identification information extraction unit 52.

  The identification information extraction unit 52 is a signal processing unit that extracts identification information from a collected sound signal. If the identification information is successfully extracted, the extracted identification information is output. For example, in the case where the diffusion echo method is used as the audio watermark, identification information is extracted by each processing of cepstrum conversion and kernel correlation. Specifically, the collected signal is divided into short time slots, and FFT (Fast Fourier Transform) processing, logarithmic transformation, and IFFT (Inverse Fast Fourier Transform) are performed to obtain a cepstrum of the time slot. Further, the bit information superimposed on the time slot is determined by calculating a correlation between the cepstrum and two pieces of kernel information given in advance. By repeating such a determination process by the number of bits, identification information having a desired number of bits is extracted.

  The identification information storage unit 53 is a storage unit that stores identification information. When new identification information is extracted by the identification information extraction unit 52, the identification information storage unit 53 overwrites and updates old identification information, and holds the last acquired identification information.

  The table acquisition unit 54 is a unit that acquires the conversion table Tb from the data server 7. For example, the conversion table Tb is obtained by transmitting a request packet to the data server 7 by being connected to the communication network N via a wireless line. The request packet includes a language designation, and acquires a conversion table of the language from the data server 7. The language is specified based on the language information held by the terminal attribute storage unit 50.

  The table storage unit 55 is a storage unit that stores the conversion table Tb acquired by the table acquisition unit 54.

  The conversion unit 56 is a processing unit that converts identification information into notification information using the conversion table Tb. The identification information is read from the identification information storage unit 53, and the conversion table Tb is read from the table storage unit 55.

  The display unit 57 is a display unit that displays the notification information generated by the conversion unit 56, and uses a liquid crystal panel or an organic EL panel.

  Steps S101 to S104 in FIG. 6 are flowcharts illustrating an example of the operation of the mobile terminal device 5.

  The microphone 51 collects the broadcast sound output from the speaker unit 4 and generates a sound collection signal (step S101). The identification information extracting unit 52 extracts identification information from the collected sound signal (Step S102). If the identification information is successfully extracted, the conversion unit 56 converts the identification information into notification information using the conversion table Tb (step S103). The notification information thus obtained is displayed and output by the display unit 57 (step S104).

(6) Configuration and Operation of Information Presenting Apparatus 6 FIG. 7 is a block diagram showing a configuration example of the information presenting apparatus 6 of FIG. The information presentation device 6 includes a signal receiving unit 61, an identification information extraction unit 62, an identification information storage unit 63, a table acquisition unit 64, a table storage unit 65, a conversion unit 66, and a display unit 67.

  The signal receiving unit 61 is connected to the speaker line 3 via the connection adapter 60, and receives a broadcast signal on the speaker line 3.

  The identification information extraction unit 62 is a signal processing unit that extracts identification information from a signal received by the signal reception unit 61. If the identification information is successfully extracted, the identification information is output. The processing in the identification information extraction unit 62 is the same as the processing in the identification information extraction unit 52 of the portable terminal device 5.

  The identification information storage unit 63 is a storage unit that stores identification information. When new identification information is extracted by the identification information extraction unit 62, the identification information storage unit 63 overwrites and updates old identification information, and holds the last acquired identification information.

  The table acquisition unit 64 is a unit that acquires the conversion table Tb from the data server 7. For example, the conversion table Tb is acquired by transmitting a request packet to the data server 7 by being connected to the communication network N via a wireless line or a wired line. The request packet includes a language designation, and acquires a conversion table of the language from the data server 7. The table obtaining unit 64 specifies two or more predetermined languages and obtains two or more conversion tables Tb corresponding to each language.

  The table storage unit 65 is a storage unit that stores the conversion table Tb acquired by the table acquisition unit 64. The table storage unit 65 holds two or more conversion tables Tb having different languages. Since these conversion tables Tb have the same identification information and different languages of the broadcast information, they are equivalent to conversion tables in which the identification information is associated with the broadcast information in two or more languages.

  The conversion unit 66 is a processing unit that converts identification information into notification information using the conversion table Tb, and generates two or more notification information in different languages from one identification information using two or more conversion tables Tb. I do. The identification information is read from the identification information storage unit 63, and two or more conversion tables Tb are read from the table storage unit 65.

  The display unit 67 is a display unit that displays the notification information generated by the conversion unit 66, and uses a liquid crystal panel or an organic EL panel. Note that two or more pieces of notification information in different languages are displayed simultaneously or sequentially.

  Steps S201 to S204 in FIG. 8 are flowcharts illustrating an example of the operation of the information presentation device 6.

  The signal receiving unit 61 receives a broadcast signal on the speaker line 3 and generates a received signal (Step S201). The identification information extraction unit 62 extracts identification information from the collected sound signal (Step S202). If the identification information is successfully extracted, the conversion unit 66 converts the identification information into two or more pieces of notification information using two or more conversion tables Tb (step S203). The two or more pieces of notification information thus obtained are displayed and output by the display unit 67 (step S204).

(7) Effect In the broadcasting system 100 according to the present embodiment, the signal processing device 1 generates a broadcast signal in which identification information is superimposed on an audio signal by a voice watermark, and the broadcast device 2 transmits the broadcast signal to the speaker line 3. The mobile terminal device 5 and the information presenting device 6 perform display output based on the broadcast signal. That is, based on the same broadcast signal, each mobile terminal device 5 presents information with high visibility and convenience to a specific terminal user, while the information presentation device 6 displays any facility in the broadcast space. Information can be widely presented to users.

  Therefore, the convenience of the broadcasting system 100 can be improved. For example, information can be presented to a facility user who does not carry the mobile terminal device 5 or a terminal user whose mobile terminal device 5 does not operate normally. In addition, while the mobile terminal device 5 presents information in the user's language, the information presenting device 6 presents information in two or more languages, so that the convenience can be further improved.

  In broadcast system 100 according to the present embodiment, portable terminal device 5 extracts identification information from a collected sound signal obtained by collecting broadcast sound output from speaker unit 4, whereas information presentation device 6 includes a speaker. The identification information is extracted from the broadcast signal on the speaker line 3 without the interposition of the unit 4. Therefore, the information presentation device 6 can reliably acquire the identification information without being affected by the noise environment in the broadcast space R. Therefore, in a noise environment, the mobile terminal device 5 can be complemented by the information presentation device 6, and the reliability of the broadcasting system 100 can be improved.

  In broadcast system 100 according to the present embodiment, information presentation device 6 is connected to speaker line 3 and acquires identification information from broadcast device 2 via speaker line 3. Since a broadcasting system used also for emergency broadcasting generally has high reliability, the reliability of the information presentation device 6 can be improved by acquiring identification information via the speaker line 3. For example, as compared with a case where identification information is obtained via a general communication network such as a LAN or the Internet, the reliability of the information presentation device 6 in an emergency such as a power outage is improved to the same level as the reliability of a broadcasting system. Can be. In particular, when a fire-resistant cable is used for the speaker line 3, the function of the information presentation device 6 can be maintained even when a fire occurs. Moreover, the installation cost of the information presenting device 6 can be significantly reduced as compared with the case where a dedicated line is laid for the information presenting device 6.

  Further, in the broadcasting system 100 according to the present embodiment, the speaker unit 4 and the information presenting device 6 covering the same broadcast space R are connected to the same speaker line 3, and the portable terminal device 5 and the information presenting device 6 are connected to the same broadcast. Display output is performed based on the signal. For this reason, it is possible to prevent the portable terminal device 5 and the information presenting device 6 from performing display outputs that do not match each other due to a wiring error or the like.

  In the broadcasting system 100 according to the present embodiment, the portable terminal device 5 uses the conversion table Tb corresponding to one language in advance to specify one language as the attribute information, and converts the identification information into the broadcast information of the language. Convert and display and output. Therefore, each mobile terminal device 5 can present information in a language desired by the user. On the other hand, the information presentation device 6 converts the identification information into each piece of notification information in two or more languages by using a conversion table Tb corresponding to two or more predetermined languages, and displays each of them. For this reason, the information presentation device 6 can display notification information corresponding to two or more languages, and can present information to an arbitrary target person.

  In the broadcasting system 100 according to the present embodiment, each of the mobile terminal devices 5 and the information presenting device 6 acquires the conversion table Tb via the communication network N, and holds the conversion table Tb in each device in advance. Therefore, the conversion table Tb can be easily obtained by obtaining the conversion table Tb via the communication network. Further, by acquiring and holding the conversion table Tb in advance, display output can be performed without being affected by the communication environment, and the amount of identification information can be reduced.

Embodiment 2 FIG.
In the above embodiment, an example has been described in which the portable terminal device 5 and the information presentation device 6 use the same conversion table Tb. On the other hand, in the present embodiment, an example in which the information presentation device 6 uses a conversion table Tb different from that of the portable terminal device 5 will be described. An example in which two or more information display terminals 6 use different conversion tables Tb will be described.

  FIG. 9 is a diagram showing an example of the conversion tables Tb1 to Tb3 according to the second embodiment of the present invention. FIG. 9A shows a conversion table Tb1 used by each portable terminal device 5, FIG. 9B shows a conversion table Tb2 used by the information presenting device 6a, and FIG. 9C. Shows a conversion table Tb3 used by the information presentation device 6b.

  In (a) to (c) in the drawing, the information of the evacuation route included in the notification information associated with the identification information 0001 is different. The conversion table Tb1 includes general and abstract information on the evacuation route “through the nearest exit”, while the conversion table Tb2 includes the evacuation route “through the first exit”. Individual and specific information is included, and the conversion table Tb3 includes individual and specific information regarding the evacuation route “through the second exit”.

  The conversion tables Tb2 and Tb3 are conversion tables for the information presenting devices 6a and 6b, and include information on individual and specific evacuation routes corresponding to the respective installation locations. On the other hand, the conversion table Tb1 for each mobile terminal device 5 does not include information on an individual and specific evacuation route because its position is not specified.

  In the broadcast system according to the present embodiment, convenience can be improved by using the conversion tables Tb2 and Tb3 different from the portable terminal device 5 by the information presentation device 6. When two or more information presenting devices are installed, by using conversion tables Tb2 and Tb3 different from each other, information can be presented according to their installation locations, and the convenience can be further improved. In particular, it is suitable when the notification information is a disaster alert.

REFERENCE SIGNS LIST 1 signal processing device 2 broadcast device 3 speaker lines 4, 4 a to 4 c speaker unit 5 portable terminal device 50 terminal attribute storage unit 51 microphone 52 identification information extraction unit 53 identification information storage unit 54 table acquisition unit 55 table storage unit 56 conversion unit 57 Display units 6, 6a to 6b Information presentation device 60 Connection adapter 601 Transformer 61 Variable resistor 61 Signal receiving unit 62 Identification information extraction unit 63 Identification information storage unit 64 Table acquisition unit 65 Table storage unit 66 Conversion unit 67 Display unit 7 Data server 100 broadcast system N communication network R broadcast space Tb, Tb1 to Tb3 conversion table

Claims (6)

A broadcasting device that outputs a broadcast signal on which identification information of information related to broadcast content is superimposed to a speaker line,
One or more speaker units connected to the speaker line and emitting sound based on the broadcast signal;
An information presentation device that is connected to the speaker line, extracts the identification information from the broadcast signal, and presents information related to broadcast content emitted from the speaker unit based on the extracted identification information. Broadcasting system. The broadcast system further includes:
The identification information is extracted from a collected sound signal obtained by collecting an output sound from the speaker unit, and based on the extracted identification information, includes two or more mobile terminal devices that present information related to broadcast content,
The portable terminal device includes a conversion table having attribute information predetermined for each terminal device, and associating the identification information with broadcast information corresponding to the attribute information, and using the conversion table to perform the identification. Converting information to the broadcast information, presenting the broadcast information,
The information presentation device includes a conversion table that associates the identification information with two or more pieces of predetermined notification information, and converts the identification information into the two or more pieces of notification information using the conversion table. The broadcasting system according to claim 1, wherein information is presented. The broadcast system further includes:
The mobile phone includes two or more mobile terminal devices that extract the identification information from a collected sound signal obtained by collecting an output sound from the speaker unit and that presents information related to broadcast content based on the extracted identification information,
The portable terminal device includes a conversion table that associates the identification information with broadcast information corresponding to one language predetermined for each terminal device, and uses the conversion table to convert the identification information into the broadcast information. Convert, present the notification information,
The information presentation device includes a conversion table that associates the identification information with broadcast information corresponding to two or more predetermined languages, and uses the conversion table to change the identification information according to the two or more languages. The broadcast system according to claim 1, wherein the broadcast system converts the broadcast information into broadcast information and presents the broadcast information. Comprising two or more of the information presenting devices,
The information presentation device holds a conversion table that associates the identification information with notification information according to an installation location, converts the identification information into the notification information using the conversion table, and presents the notification information. The broadcast system according to any one of claims 1 to 3, wherein:   The broadcast system according to claim 2, wherein the portable terminal device acquires the conversion table via a communication network and holds the conversion table in the portable terminal device in advance. Connecting means for connecting to a speaker line to which a plurality of speakers are connected, through which a broadcast signal on which identification information of information related to the broadcast content is superimposed flows;
Extracting means for extracting the identification information from a broadcast signal obtained by the connection,
An information presentation device comprising: presentation means for presenting information related to broadcast content emitted from the speaker unit based on the extracted identification information.

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