JP2011215230A - Broadcasting device, receiving device, and broadcasting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a broadcasting system which prevents an important part of a broadcasting voice signal such as cabin announcement from being missed.SOLUTION: A broadcasting device incudes: a voice input section that receives a broadcasting voice signal as a broadcasting content; an operation section for receiving an operation for indicating a specific section of the broadcasting voice signal; a control signal combination section which generates a control signal as a voice signal for indicating the specific section in accordance with the operation of the operation section, and which combines the control signal with the broadcasting voice signal; and a sound emission section for emitting the broadcasting voice signal with the control signal combined therewith. A voice receiving device includes: a voice collecting section for collecting the broadcasting voice signal with the control signal combined therewith; a control signal detection section for detecting the control signal from the collected voice signal; a recording section for recording the broadcasting voice signal of the specific section which is indicated by the control signal; and a specific section reproduction section for reproducing the broadcasting voice signal of the specific section recorded by the recording section. A broadcasting system includes both the broadcasting device and the receiving device.

Description

  The present invention relates to a broadcasting device, a receiving device, and a broadcasting system that can repeatedly listen to important phrases of broadcast audio signals such as train in-car broadcasts.

  In-car broadcasts such as the Shinkansen are polite but redundant because greetings and honorifics are added before and after. On the other hand, “next stop station”, “estimated arrival time”, etc., which are important contents in the in-car broadcast, are not particularly emphasized and are announced only once like other greetings and honorifics. For this reason, passengers may miss important matters while listening to in-car broadcast greetings.

JP 2008-097177 A

  In addition, although the technique regarding in-vehicle broadcasting is described in, for example, Patent Document 1 or the like, no technique for preventing the above-mentioned important matters from being missed has been proposed.

  An object of the present invention is to provide a broadcasting device, a receiving device, and a broadcasting system that prevent an important section of a broadcast audio signal such as in-car broadcast from being missed.

  The broadcast apparatus according to the first aspect of the present invention includes an audio input unit to which a broadcast audio signal that is broadcast content is input, an operation unit that receives an operation instructing a specific section in the broadcast audio signal, and an operation of the operation unit In response to the control signal, a control signal that is an audio signal indicating the specific section is generated, a control signal synthesis unit that synthesizes the control signal with the broadcast audio signal, and a broadcast audio signal synthesized with the control signal is emitted. And a sound emission part.

  The broadcast apparatus according to the second aspect of the present invention includes an audio input unit to which a broadcast audio signal that is broadcast content is input, an operation unit that receives an operation instructing a specific section in the broadcast audio signal, and an operation of the operation unit A control signal that is a sound signal indicating the specific section according to the control signal, and a control signal combining unit that combines the control signal with the broadcast sound signal, and a recording that records the broadcast sound signal combined with the control signal And a broadcast processing unit that reproduces and emits a broadcast audio signal synthesized with the control signal recorded by the recording unit.

  A receiving device according to claim 3 is a sound collection unit that collects a sound signal in which a control signal that is a sound signal that indicates a specific section in the broadcast sound signal is synthesized with a broadcast sound signal that is a broadcast content. A control signal detection unit that detects the control signal from the collected audio signal, a recording unit that records the broadcast audio signal in a specific section indicated by the control signal, and the specific section recorded by the recording unit And a specific section reproducing unit for reproducing the broadcast audio signal.

  According to a fourth aspect of the present invention, there is provided a broadcasting system comprising the broadcasting device according to the first or second aspect and the receiving device according to the third aspect.

  A broadcast apparatus according to claim 5 is a reproduction unit that reproduces an audio signal in which a control signal that is an audio signal that indicates a specific section in the broadcast audio signal is combined with a broadcast audio signal that is broadcast content; A control signal detection unit that detects the control signal from the collected audio signal, a recording unit that records the broadcast audio signal of a specific section indicated by the control signal, and a broadcast of the specific section recorded by the recording unit A specific section reproducing section for reproducing an audio signal, a modulation section for frequency-shifting the broadcast audio signal of the specific section reproduced by the specific section reproducing section to a non-audible sound range, and the broadcasting of the specific section frequency-shifted by the modulation section A broadcast processing unit that synthesizes and emits an audio signal and a broadcast audio signal reproduced by the reproduction unit is provided.

  According to a sixth aspect of the present invention, there is provided a broadcasting system comprising: the broadcasting device according to the fifth aspect; a sound collecting unit that collects a sound signal emitted by the broadcast processing unit; and a sound signal collected by the sound collecting unit. And a reception device having a demodulation and reproduction unit that extracts the broadcast audio signal of the specific section that has been frequency-shifted, reverse-frequency shifts to an audible band, and emits the sound.

A seventh aspect of the invention is characterized in that, in the first and second aspects of the invention, the control signal synthesizing unit synthesizes the control signal over the entire specific section of the broadcast audio signal.
The broadcasting apparatus according to claim 1 or 2.

  The invention according to claim 8 is the invention according to claim 1, wherein the control signal synthesis unit synthesizes the control signal with a start part and an end part of the specific section of the broadcast audio signal.

  The invention of claim 9 is the invention of claim 1 or 2, characterized in that the control signal synthesis unit synthesizes the control signal at the start of the broadcast audio signal or the start of the specific section. To do.

  According to the present invention, by synthesizing a control signal with a specific section of a broadcast audio signal such as in-car broadcast, the specific section can be repeatedly reproduced or reproduced at a desired timing. By specifying a section in which an important word is announced as a specific section, it is possible to prevent an important item from being missed.

The figure which shows the structure of the broadcast system which is embodiment of this invention The figure explaining the form of superimposition and embedding of the control signal in the transmitter of the broadcasting system The figure which shows the structure of the transmitter which is embodiment of this invention The figure which shows the structure of the receiver which is embodiment of this invention The figure explaining the aspect of the audio | voice signal which a broadcasting apparatus emits, and the audio | voice signal which a receiver records and reproduces The figure which shows other embodiment of a broadcast apparatus. The figure which shows other embodiment of a broadcast apparatus. The figure which shows the structural example of the guidance wording memorize | stored in a broadcasting apparatus. The figure which shows other embodiment of a broadcast apparatus. The figure explaining the aspect of the audio | voice signal emitted from a broadcasting apparatus The figure which shows other embodiment of a receiver. The figure explaining the aspect of the audio | voice signal emitted from a broadcasting apparatus

  FIG. 1 is a diagram showing a configuration of a broadcast system according to an embodiment of the present invention. This system is composed of a broadcasting device that broadcasts guidance words (so-called announcements) such as in-car broadcasts on a railway, and a receiving device that receives the voices of the guidance words and repeats (or as appropriate) reproduces important sections therein. Is done. For example, in the case of a train in-car broadcast, the important section is a voice section of a sentence that is important for passengers such as a destination, a next stop station, and an estimated arrival time.

1A and 1B show different types of broadcasting systems.
In the form shown in FIG. 5A, the broadcasting apparatus 1 emits the guidance message in the form shown in FIG. A control signal, which is a signal indicating the position of an important section in the guidance text, is superimposed or embedded in the guidance text.

  Here, the superposition is a method of synthesizing a specific signal in a high frequency band (for example, 14 kHz or higher) that cannot be heard by a general person exceeding the frequency of the guidance text (for example, 0.3 to 3.4 kHz). The specific signal is, for example, an M series signal. On the other hand, embedding is a method in which a specific signal is synthesized within the frequency band of the guidance message, or the voice signal itself of the guidance message is processed and handled as a control signal. The processing of the audio signal referred to here is, for example, changing the frequency spectrum. In the following description of the embodiment, a superposition method will be described as an example, but an embedding method is also applicable.

  2A to 2C are diagrams illustrating the superimposed position of the control signal with respect to the important section. The control signal may be superimposed over the entire important section as shown in FIG. In addition, as shown in FIG. 2A, it may be superimposed on the start position and end position of the important section. Furthermore, as shown in FIG. 2B, information indicating the length may be superimposed on the start position of the important section.

  When superimposing the control information on the recorded voice after recording the guidance text, the position information (start position and end position or start position and time) of the important section is superimposed as control information on the head of the guidance text. May be.

  In the following description, a method of superimposing a control signal over the entire important section shown in FIG. 2C will be described as an example, but other methods can be similarly applied.

  In FIG. 1A, a user (for example, a passenger) listens to a guidance message broadcast from the broadcasting device 1. The receiving device 2 picks up the guidance message and detects a control signal superimposed on the guidance message. Based on the control signal, an important section in the guidance text is determined, and this important section is recorded. The receiving device 2 reproduces the recorded important section repeatedly or according to a user's reproduction operation. The user can confirm the contents by listening to the important section reproduced from the playback device 2 when he / she misses the important section from the guidance text or wants to confirm the contents again.

  Moreover, in the form of FIG. 1 (B), the broadcasting apparatus 1 broadcasts the guidance wording of the form of FIG. In this guidance message, the voice of the important section is frequency-shifted and superimposed on the high sound band that cannot be heard by the general public. Further, similarly to the form of FIG. 1A, a control signal indicating the position of an important section in the guidance text may be superimposed or embedded.

  A user (for example, a passenger) listens to a guidance message broadcast from the broadcasting device 1. The receiving device 2 picks up the frequency-shifted important section voice superimposed on the broadcast guidance message, demodulates (releases the frequency shift) the sound in the important section, and emits the sound. The user can confirm the contents by listening to the important section reproduced from the playback device 2 when he / she misses the important section from the guidance text or wants to confirm the contents again.

Hereinafter, the embodiment of FIG. 1A will be described in detail with reference to FIGS.
FIG. 3 is a diagram illustrating a configuration of the broadcasting device 1. The broadcasting device 1 includes a microphone 10, a switch 11, a microphone amplifier 12, a control signal generation unit 13, an addition unit 14, a sound emission unit 15, and a speaker 16. This broadcasting apparatus is an in-car broadcasting apparatus for vehicles such as Shinkansen. An attendant (for example, a conductor) announces guidance words (for example, arrival time and transfer guidance) to the microphone 10. This sound is collected by the microphone 10, input to the sound emitting unit 15 via the adding unit 14, amplified by the sound emitting unit 15, and spatially emitted by the speaker 16.

  The attendant announces the guidance message and turns on the switch 11 while announcing the important section. In response to this switch operation, the control signal generator 13 generates a control signal. The control signal is superimposed on the voice signal of the guidance message by the adding unit 14, input to the sound emitting unit 15, and spatially emitted from the speaker 16 together with the guidance message.

  FIG. 4 is a diagram illustrating the configuration of the receiving apparatus. The receiving apparatus includes a microphone 20, a low-pass filter (LPF) 21, a high-pass filter (HPF) 22, a recording unit 23, a control signal detection unit 24, a reproduction unit 25, and a speaker 26. The microphone 20 collects the guidance message broadcast from the broadcasting device 1 of FIG. The guidance text collected by the microphone 20 is input to the low-pass filter 21 and the high-pass filter 22. The low-pass filter 21 is a filter that passes the frequency of the guidance text (for example, 0.3 to 3.4 kHz), and a cutoff frequency of about 8000 Hz is sufficient. The high-pass filter 22 is a filter that cuts the guidance text and passes the control signal, and the cut-off frequency is about 14000 Hz.

  The guidance text whose frequency band of the control signal is cut by the low-pass filter 21 is input to the recording unit 23. The recording unit 23 records a part (important section) of the guidance text according to the recording instruction signal input from the control signal detection unit 24.

  The high frequency band component extracted by the high pass filter 22 is input to the control signal detection unit 24. The control signal detector 24 detects the control signal from the high frequency band component input from the high pass filter 22. When the control signal detection unit 24 detects the control signal, it outputs a recording instruction signal to the recording unit 23. The recording instruction signal is output over the time zone from the start position to the end position of the important section. The recording unit 23 records the guidance message only during the period when the recording instruction signal is input.

  The voice of the important section, which is the guidance word recorded by the recording unit 23, is reproduced by the reproduction unit 25 and emitted from the speaker 26. The playback unit 25 repeatedly plays back the voice of the important section recorded by the recording unit 23.

  FIG. 5 is a diagram illustrating a guidance message on which a control signal broadcast from the broadcasting device 1 is superimposed and a mode of repeated reproduction of an important section of the receiving device 2. FIG. 2A is a diagram showing an aspect of guidance wording broadcasted by the broadcasting device 1. A control signal 101 is superimposed at a position corresponding to the important section 100 </ b> A of the guidance text 100. FIG. 5B shows the form of sound emitted by the receiving device. When receiving the control signal 101, the receiving apparatus 2 records the section (important section 100A), and immediately after that, the recorded sound (important section 101) is repeatedly reproduced as the reproduced sound 110.

  The reception device 2 is provided with a reproduction switch 27 as shown by a dotted line in FIG. 4 so that the recorded voice of the important section 101 is not reproduced repeatedly and is reproduced only when the user turns on the reproduction switch 27. May be.

  The receiving device 2 is configured as a device that is carried by a user (for example, a passenger), for example. You may incorporate as a part of function of a mobile telephone or a portable music player. Further, when the receiving device 2 is provided for in-car announcements of trains such as the Shinkansen, it may be incorporated in the wall surface or armrest of the seat as in-vehicle equipment.

  The broadcasting apparatus 1 of FIG. 3 includes the microphone 10 and a staff member directly announces the guidance wording. However, the present invention is also applied to a broadcasting apparatus that records the guidance wording in advance and reproduces it. Is possible.

  FIG. 6 and FIG. 7 are diagrams showing the configuration of a broadcast apparatus that reproduces a recorded guidance message.

  FIG. 6 is a diagram illustrating an example of the broadcast apparatus 1 in which the microphone 10 and the microphone amplifier 12 of the broadcast apparatus 1 in FIG. 3 are replaced with a storage unit 30 and a reproduction unit 31. In this figure, parts having the same configurations as those of the broadcasting apparatus 1 shown in FIG. The storage unit 30 stores guide words recorded in advance. The reproduction unit 31 reproduces the guidance message stored in the storage unit 30. It is instructed by the reproduction instructing unit 32 which guidance word is reproduced at which timing. The reproduction instruction unit 32 has, for example, a button switch operated by a staff member.

  When the reproduction instruction unit 32 instructs the reproduction of the guidance message, the reproduction unit 31 reproduces the designated guidance word. As a result, the designated guidance message is emitted from the speaker 16 via the addition unit 14 and the sound emission unit 15. The attendant listens to the guidance text and turns on the switch 11 when the guidance text becomes an important section. As a result, the control signal generating unit 13 generates a control signal, and the adding unit 14 emits the sound superimposed on the guidance text as shown in FIG.

  FIG. 7 is a diagram illustrating an example in which the broadcasting device 1 and the recording device 3 are separated. The recording device 3 is a device that records a guidance message on which a control signal is superimposed in advance. The broadcasting device 1 is a device that reproduces and emits a guidance message that is recorded in advance (with a control signal superimposed) at a predetermined timing.

  FIG. 7A shows the configuration of the recording device 3. The recording device 3 includes a microphone 40, a switch 41, a microphone amplifier 42, a control signal generation unit 43, an addition unit 44, and a recording unit 45. The person in charge of recording announces a guidance message toward the microphone 40 and turns on the switch 41 while an important section is announced. The voice signal of the guidance message collected by the microphone 40 is input to the adding unit 44. The control signal generator 43 generates a control signal in response to the operation of the switch 41 by the recording person. This control signal is input to the adding unit 44. The adding unit 44 superimposes the control signal on the voice signal of the guidance message and inputs it to the recording unit 45. The recording unit 45 records the guidance text on which the control signal input from the addition unit 44 is superimposed. As a result, the recording unit 45 records the guidance text on which the control signal is superimposed as shown in FIG. The recorded content (audio file) is taken out by a medium such as a CD-ROM or an SD memory, and set in the storage unit 46 (see FIG. 7B) of the broadcasting apparatus 1.

  FIG. 7B is a diagram illustrating a configuration of the broadcasting device 1. The storage unit 46 is set with a medium in which guidance words recorded in advance by the recording device 3 are stored. The reproduction unit 47 reproduces the guidance message stored in the storage unit 46. It is instructed by the reproduction instruction section 48 which guidance word is reproduced at which timing. The reproduction instruction unit 48 has, for example, a button switch operated by a staff member. When the reproduction instruction unit 48 instructs the reproduction of the guidance message, the reproduction unit 47 reproduces the designated guidance word. Thereby, the designated guidance message (with the control signal superimposed) is emitted from the speaker 16.

  In the configuration of FIG. 7, instead of recording one guidance word as a continuous voice file, as shown in FIG. 8, it is divided and recorded into a plurality of words that are connected to form one guidance word. Also good. In this case, the words in the important section may be replaced so that they can be diverted to a plurality of guidance words.

  In the example of FIG. 8, when recording the guidance text “The next stop station« station name »is scheduled to arrive at« ○ 0:00 »« ○ ○ min »", "next stop station", "to" , "Scheduled to arrive" individually, and more than one station name (Hamamatsu, Osaka, etc.) to be inserted into «station name», and grammar of minutes when it is inserted into «XX hours» and «XX minutes» Are recorded separately. In addition, since the words inserted in the << station name >>, << XX hour >>, and << XX minutes >> are important sections, a control signal is superimposed on these words in advance.

  The words and phrases recorded in this way are combined and reproduced by the reproducing unit 47 of the broadcasting device 1, and can be reproduced and emitted as one guidance message in which the control signal is superimposed on the important section.

  When there are a plurality of important sections in this way, the same control signal may be superimposed on each important section, or the control signal of each important section may be digitally modulated to have a different ID.

  Further, in the receiving device 2, a plurality of important sections may be reproduced in order, for example, “Hamamatsu, 10 hours, 40 minutes”, or an important section designated according to the user's operation is reproduced. You may do it.

  The broadcast system having the configuration shown in FIG. 1A has been described above. Hereinafter, the broadcast system having the configuration shown in FIG. 1B will be described.

  FIG. 9 is a diagram illustrating a configuration of the broadcasting device 1 that emits sound by superimposing an audio signal of an important section on a guidance message during broadcasting. FIG. 10 is a diagram for explaining a mode of reproduction of an important section by the reproduction unit 56 and a mode of frequency shift by the modulation unit 57.

  The broadcasting apparatus 1 reads out the guidance message from the storage unit 50 that stores an audio file (hereinafter simply referred to as a guidance message) in which the control signal 101 is preliminarily superimposed at a location corresponding to the important section 101A of the guidance message 100. This is a device that superimposes the words of the important section corresponding to the control signal on this guidance wording and emits sound.

  The broadcasting device 1 includes a storage unit 50, a reproduction unit 51, a low-pass filter (LPF) 52, a high-pass filter (HPF) 53, a control signal detection unit 54, a recording unit 55, a reproduction unit 56, a modulation unit 57, an addition unit 58, A sound emitting unit 59, a speaker 60, and a reproduction instruction unit 61 are provided. The storage unit 50 stores guidance words that are recorded in advance and in which control signals are superimposed on important sections. The reproduction unit 51 reproduces the guidance text stored in the storage unit 50. It is instructed by the reproduction instruction unit 61 which guidance word is reproduced at which timing. The reproduction instruction unit 61 has, for example, a button switch operated by a staff member. When the reproduction instruction unit 61 instructs the reproduction of the guidance message, the reproduction unit 51 reproduces the designated guidance word (with the control signal superimposed). The reproduced guidance text is input to the low pass filter 52 and the high pass filter 53.

  The low-pass filter 52 is a filter that passes the frequency of the guidance text. The high-pass filter 53 is a filter that cuts the guidance text and passes the control signal. The guidance word whose frequency band of the control signal is cut by the low-pass filter 52 is input to the adding unit 58 and the recording unit 55. The recording unit 55 records an important section, which is a part of the guidance text, in accordance with a recording instruction signal input from the control signal detection unit 54 described later.

  On the other hand, the high frequency band component extracted by the high pass filter 53 is input to the control signal detection unit 54. The control signal detector 54 detects the control signal from the high frequency band component input from the high pass filter 53. The control signal detection unit 53 outputs a recording instruction signal to the recording unit 55 when detecting the control signal. The recording instruction signal is output over the time zone from the start position to the end position of the important section. The recording unit 55 records the guidance message only during the period when the recording instruction signal is input.

  The sound of the important section recorded by the recording unit 55 is repeatedly reproduced by the reproducing unit 56. The replayed important section audio is input to the modulation section 57. The modulation unit 57 frequency-shifts (modulates) the sound in the important section to a high sound range that is a non-audible band, and outputs the result to the addition unit 58. The adder 58 adds and synthesizes the guidance message and the modulated voice of the important section and outputs the result to the sound emitting unit 59. Here, the audio signal in the important section is repeatedly reproduced at the timing shown in the reproduced audio 200A in FIG. 10, and is shifted in the frequency band as shown and output. The sound emitting unit 59 amplifies a sound signal obtained by adding the guidance text and the modulated sound of the important section, and inputs the amplified sound signal to the speaker 60 to emit the sound.

  FIG. 11 is a block diagram of the receiving device 2 that receives the guidance message that the transmitting device 1 of FIG. The receiving device 2 includes a microphone 70, a high pass filter (HPF) 71, a demodulator 72, a sound emitting unit 73, and a speaker 74.

  The microphone 70 picks up the guidance message broadcast from the broadcasting device 1 of FIG. The guidance text collected by the microphone 70 is input to the high pass filter 71. The high-pass filter 22 is a filter that passes an inaudible high-frequency band component in which the audio signal in the important section modulated by cutting the guidance text is frequency-shifted. The cut-off frequency is determined according to the shifted frequency, and is about 14000 Hz, for example.

  The high frequency band component extracted by the high pass filter 71 is input to the demodulator 72. The demodulator 72 is a functional unit that reversely shifts the frequency-shifted audio signal in the important section and demodulates it into a normal audio signal in the audible band. The demodulated audio signal in the important section is input to the sound emitting unit 73. The sound emitting unit 73 amplifies the audio signal in the important section input from the demodulating unit and inputs it to the speaker 74. As a result, the audio signal in the important section that is emitted from the broadcasting device 1 by shifting the frequency to the inaudible band is emitted from the speaker 74 as the audio in the audible band.

  With the above-described configuration, it is possible to read out the guidance message on which the control signal is superimposed as an audio signal, extract, modulate, and superimpose the important section based on the control signal and emit the guidance message. Therefore, it is possible to extract an important section without embedding sub-information such as a tag other than the audio signal in the guidance text.

  In addition, when the broadcasting apparatus 1 shown in FIG. 9 extracts an important section from a guidance message on which a control signal is superimposed in advance, and modulates and superimposes the sound, the guidance message is pre-read before the sound is emitted and the important section is selected. Recording may be performed in advance, and the important section may be modulated and superimposed from the beginning of the guidance message as shown in FIG.

  10 and 12, the audio signal 111 in the important section is described so as to be frequency shifted to a higher frequency band than the control signal 101. However, the control signal 101 is cut by the low-pass filter 52 in the broadcasting device 1. In this case, the frequency band of the audio signal 111 in the important section and the frequency band of the control signal 101 may overlap. Further, the low-pass filter 52 of the broadcasting device 1 may be omitted. In this case, as shown in FIGS. 10 and 12, the frequency band of the audio signal 111 in the important section that is frequency-shifted with the frequency band of the control signal 101 is used. And do not overlap.

  In addition, when there are a plurality of important sections, the respective important sections may be superposed one after another, or the high frequency band may be divided and the plurality of important sections may be superposed on each band. When superimposing a plurality of important sections for each band, the receiving device 2 may reproduce the plurality of important sections in order, or may reproduce the important section of the designated band according to the user's operation. Good.

  In the broadcasting device 1 of FIG. 9, the audio signal in the important section reproduced by the reproducing unit 56 is modulated. However, the audio signal is modulated during recording, and the modulated audio signal in the important section is reproduced and directly added. 58 may be input.

DESCRIPTION OF SYMBOLS 1 Broadcasting device 2 Receiving device 13 Control signal generation part 24 Control signal detection part

Claims (9)

An audio input unit for receiving broadcast audio signals that are broadcast contents;
An operation unit for receiving an operation for instructing a specific section in the broadcast audio signal;
A control signal synthesizing unit that generates a control signal that is an audio signal instructing the specific section according to an operation of the operation unit, and synthesizes the control signal with the broadcast audio signal;
A sound emitting unit that emits a broadcast audio signal synthesized with the control signal;
Broadcasting device with An audio input unit for receiving broadcast audio signals that are broadcast contents;
An operation unit for receiving an operation for instructing a specific section in the broadcast audio signal;
A control signal synthesizing unit that generates a control signal that is an audio signal instructing the specific section according to an operation of the operation unit, and synthesizes the control signal with the broadcast audio signal;
A recording unit for recording a broadcast audio signal synthesized with the control signal;
A broadcast processing unit that reproduces and emits a broadcast audio signal synthesized with the control signal recorded by the recording unit;
Broadcasting device with A sound collection unit that collects a sound signal in which a control signal that is a sound signal that indicates a specific section in the broadcast sound signal is combined with a broadcast sound signal that is a broadcast content;
A control signal detector for detecting the control signal from the collected audio signal;
A recording unit for recording the broadcast audio signal in a specific section indicated by the control signal;
A specific section playback section for playing back the broadcast audio signal of the specific section recorded by the recording section;
Receiving device   A broadcasting system comprising: the broadcasting device according to claim 1; and the receiving device according to claim 3. A reproduction unit that reproduces an audio signal in which a control signal that is an audio signal that indicates a specific section in the broadcast audio signal is combined with a broadcast audio signal that is broadcast content;
A control signal detector for detecting the control signal from the collected audio signal;
A recording unit for recording the broadcast audio signal in a specific section indicated by the control signal;
A specific section playback section for playing back the broadcast audio signal of the specific section recorded by the recording section;
A modulation section for frequency-shifting the broadcast audio signal of the specific section reproduced by the specific section reproduction section to a non-audible sound range;
A broadcast processing unit that synthesizes and emits the broadcast audio signal of the specific section frequency-shifted by the modulation unit and the broadcast audio signal reproduced by the reproduction unit;
Broadcasting device with A broadcasting device according to claim 5;
A sound collection unit that collects the audio signal emitted by the broadcast processing unit, and the frequency-shifted broadcast audio signal of the specific section is extracted from the audio signal collected by the sound collection unit, and is reversely shifted to an audible band A receiving device having a demodulating and reproducing unit for emitting sound;
A broadcasting system with   The broadcasting apparatus according to claim 1, wherein the control signal synthesis unit synthesizes the control signal over the entire specific section of the broadcast audio signal.   The broadcast apparatus according to claim 1, wherein the control signal synthesis unit synthesizes the control signal with a start part and an end part of the specific section of the broadcast audio signal.   The broadcast apparatus according to claim 1, wherein the control signal synthesis unit synthesizes the control signal with a start part of the broadcast audio signal or a start part of the specific section.

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