JP2021148823A - Sound output device, broadcasting system, sound output method, and broadcasting method - Google Patents

Abstract

To reduce the possibility of a broadcast being missed hearing by a sound emanated by an apparatus when using an apparatus that generates a sound at operation time.SOLUTION: A sound output device 30 comprises: a microphone 31 for sound collection which is capable of collecting a sound signal out of the audible band that is broadcast from a broadcasting device; a speaker 32 for reproduction which is, when actuated, capable of generating a sound of such a size as to obstruct hearing of a sound of the audible band that is broadcast from the broadcasting device; and a control unit 40 for reproduction which, when the microphone 31 for sound collection has collected a sound signal out of the audible band, controls the operation of the speaker 32 for reproduction to control the level of the generated sound so that a sound of the audible band that is broadcast from the broadcasting device becomes easy to hear.SELECTED DRAWING: Figure 3

Description

The present invention relates to an audio output device, a broadcasting system, an audio output method and a broadcasting method.

A technology is known that enables the user to listen to a radio broadcast such as traffic information or news after the end of a call even if a call is received and muted while receiving a radio broadcast such as traffic information or news (for example, a patent). Reference 1). The nurse call master unit sends an audible out-of-band frequency signal to the slave unit of the specified channel selection line, collects the test signal from the speaker of the slave unit with a microphone, sends it back to the nurse call master unit, and sends the reply signal. There is known a technique of determining normality or abnormality by comparing with a reference value with a nurse call master unit and displaying the result (see, for example, Patent Document 2).

Japanese Unexamined Patent Publication No. 10-322232 JP-A-2007-150703

For example, there are broadcasts that you do not want to miss, such as in-car broadcasts such as trains or outdoor emergency broadcasts performed by local governments. However, when the user is using a device that emits sound during operation, the sound emitted by the device may cause the user to miss the broadcast.

The present invention has been made in view of the above, and an object of the present invention is to reduce the risk of missing a broadcast due to the sound emitted by the device when the device that emits sound during operation is used.

In order to solve the above-mentioned problems and achieve the object, the audio output device according to the present invention operates with a user sound collecting unit capable of collecting sound signals outside the audible band broadcast from the broadcasting device. As a result, when the operating unit capable of emitting a sound that hinders the hearing of the sound in the audible band broadcast from the broadcasting device and the sound collecting unit for the user pick up the sound signal outside the audible band. An output control unit that controls the operation of the operation unit and controls the level of the sound so that the sound in the audible band broadcast from the broadcasting device can be easily heard is provided.

The broadcasting system according to the present invention includes the above-mentioned audio output device and a broadcasting device having a broadcasting audio output unit that outputs an audible band for broadcasting and an audio signal outside the audible band.

The audio output method according to the present invention includes a step of collecting an audio signal in the audible band by a user sound collecting unit capable of collecting an audio signal outside the audible band broadcast from a broadcasting device, and the user collecting. When the sound unit picks up an audio signal outside the audible band, the sound in the audible band broadcast from the broadcasting device is operated so as to be easy to hear, so that the sound in the audible band broadcast from the broadcasting device can be easily heard. It includes an output control step of controlling the operation of an operating unit capable of producing a sound to the extent that it interferes with hearing, and controlling the level of the sound.

The broadcasting method according to the present invention is a broadcasting method using the above-mentioned broadcasting system, and includes a step of outputting an audio signal outside the audible band before outputting an audio signal in the audible band from the broadcasting audio output unit. , A step of picking up an audio signal outside the audible band broadcast from the broadcasting device, and when the user sound collecting unit picks up an audio signal outside the audible band, it is output from the user audio output unit. The step of controlling the output of the audio signal is included.

According to the present invention, when using a device that emits sound during operation, it is possible to reduce the risk of missing a broadcast due to the sound emitted by the device.

FIG. 1 is a schematic view showing a configuration example of a broadcasting system according to an embodiment. FIG. 2 is a block diagram showing a configuration example of the broadcasting device according to the embodiment. FIG. 3 is a block diagram showing a configuration example of the audio output device according to the embodiment. FIG. 4 is a flowchart showing a processing flow in the audio output device according to the embodiment. FIG. 5 is a diagram illustrating an example of audio output control processing. FIG. 6 is a diagram illustrating another example of the audio output control process. FIG. 7 is a diagram illustrating another example of the audio output control process.

Hereinafter, embodiments of an audio output device, a broadcasting system, an audio output method, and a broadcasting method according to the present invention will be described in detail with reference to the accompanying drawings. The present invention is not limited to the following embodiments.

[Embodiment]
<Broadcasting system>
FIG. 1 is a schematic view showing a configuration example of the broadcasting system 1 according to the embodiment. The broadcasting system 1 includes a broadcasting device 10 that broadcasts an announcement of information to be conveyed to the listener, and an audio output device 30 that can emit a sound that makes the announcement difficult to hear during operation. Here, the audio output device 30 is a device that may emit a sound that is difficult to hear depending on the operating state. The broadcasting system 1 controls the generation of sound from the audio output device 30, for example, the reduction of the sound level so that the announcement can be easily heard when the announcement is broadcast by the broadcasting device 10.

<Broadcasting equipment>
FIG. 2 is a block diagram showing a configuration example of the broadcasting device 10 according to the embodiment. The broadcasting device 10 includes, for example, a device for broadcasting an in-vehicle announcement in a vehicle such as a train, a device for broadcasting an in-house announcement notifying that a fire has occurred indoors, a device for broadcasting an emergency broadcast outdoors, and the like. The broadcasting device 10 broadcasts audio signals in the audible band and outside the audible band.

The audible band is a frequency band that humans can normally hear. The audible band is, for example, a range of 20 Hz or more and 20000 Hz or less. The out-of-audible band is a frequency band that humans cannot normally hear. The outside of the audible band is, for example, a range smaller than 20 Hz or larger than 20000 Hz.

In the present embodiment, the broadcasting device 10 will be described as a device for broadcasting an in-vehicle announcement inside the train. The broadcasting device 10 is arranged on the train. The broadcasting device 10 includes a broadcasting microphone 11, a broadcasting speaker (broadcasting audio output unit) 12, and a broadcasting control unit 20.

In-car announcements include, for example, arrival information notifying arrival at a station, departure information notifying departure of a station, guidance information such as transfer guidance or railway line guidance, or emergency information notifying an emergency such as an accident or emergency stop. It's an announcement. In-vehicle announcements include those made by the conductor and those made by playing back pre-recorded voice data. In the following description, it will be described as being performed by the conductor.

The broadcasting microphone 11 acquires an audio signal for broadcasting. An announcement in the vehicle is input to the broadcasting microphone 11. In this embodiment, the broadcasting microphone 11 is arranged in the conductor room of the train. The broadcast microphone 11 is switched between acquiring and stopping the acquisition of an audio signal by a switch. When the switch of the broadcasting microphone 11 is turned on, the broadcasting control unit 20 indicates the start of an in-vehicle announcement before starting the acquisition of the audio signal spoken by the driver, and is out of the audible band stored in an internal memory (not shown). The audio signal of is supplied to the broadcast audio acquisition unit 21. When the switch is turned on, the broadcasting microphone 11 starts acquiring the voice signal of the in-vehicle announcement spoken by the conductor. The broadcasting microphone 11 outputs the acquired audio signal to the broadcasting audio acquisition unit 21 of the broadcasting control unit 20. The broadcasting microphone 11 stops acquiring the audio signal when the switch is turned off.

The broadcast control unit 20 indicates the end of the in-vehicle announcement when the switch of the broadcast microphone 11 is turned off or the acquisition of the voice signal spoken by the commander is interrupted continuously for a predetermined time. Is preferably supplied to the broadcast audio acquisition unit 21. The out-of-audible audio signal indicating the end of the in-vehicle announcement may have the same waveform as the out-of-audible audio signal indicating the start of the in-vehicle announcement, or may have a different waveform. By using different waveforms, it is possible to clearly distinguish the start and end of the in-vehicle announcement.

The broadcast speaker 12 is an audio output device that outputs broadcast audio. The broadcast speaker 12 can output audio signals in the audible band for broadcasting and outside the audible band. The broadcast speaker 12 outputs audio in the audible band and out of the audible band based on the audio signal output from the broadcast output processing unit 22 of the broadcast control unit 20. In this embodiment, a plurality of broadcasting speakers 12 are arranged in the train.

In the present embodiment, the broadcasting speaker 12 outputs an in-vehicle announcement to be heard by passengers in the vehicle and an audio signal outside the audible band. More specifically, the sound in the audible band output from the broadcast speaker 12 will be heard by the passenger as an in-vehicle announcement. The broadcast speaker 12 outputs an audio signal outside the audible band before the start of the in-vehicle announcement, based on the audio signal output from the broadcast output processing unit 22. The broadcast speaker 12 may output an audio signal outside the audible band at the end of the in-vehicle announcement based on the audio signal output from the broadcast output processing unit 22. The sound outside the audible band output from the broadcast speaker 12 is a frequency band that passengers cannot hear. The sound outside the audible band output from the broadcast speaker 12 triggers the start or end of the output control process in the audio output device 30. The sound outside the audible band output from the broadcast speaker 12 may have different waveforms at the start of the in-vehicle announcement and at the end of the in-vehicle announcement.

The broadcast control unit 20 is, for example, an arithmetic processing unit composed of a CPU (Central Processing Unit) or the like. The broadcast control unit 20 loads a program stored in a storage unit (not shown) into the memory and executes an instruction included in the program. The broadcast control unit 20 includes a broadcast audio acquisition unit 21 and a broadcast output processing unit 22. The broadcasting control unit 20 includes an internal memory (not shown), and the internal memory is used for storing data in the broadcasting control unit 20 and the like. The internal memory stores, for example, an audio signal outside the audible band.

The broadcast audio acquisition unit 21 acquires broadcast audio data. More specifically, the broadcast audio acquisition unit 21 performs A / D (Analog / Digital) conversion processing on the audible band output by the broadcast microphone 11 and the audio signal outside the audible band generated by the broadcast control unit 20. Execute and acquire audio data which is digital data. The broadcast audio acquisition unit 21 outputs the acquired audio data in the audible band and out of the audible band to the broadcast output processing unit 22.

The broadcast output processing unit 22 executes decoding processing and D / A (Digital / Analog) conversion processing on the audible band and the audio data outside the audible band acquired from the broadcasting audio acquisition unit 21, and performs the audible band. And the audio signal outside the audible band is output from the broadcasting speaker 12.

In the present embodiment, the broadcast output processing unit 22 outputs an in-vehicle announcement to be heard by passengers in the vehicle and an audio signal outside the audible band from the broadcast speaker 12. The broadcast output processing unit 22 outputs an audio signal outside the audible band from the broadcast speaker 12 before the start of the in-vehicle announcement. The broadcast output processing unit 22 may output an audio signal outside the audible band from the broadcast speaker 12 at the end of the in-vehicle announcement.

The broadcast output processing unit 22 may output audio signals outside the audible band having different waveforms from the broadcast speaker 12 at the start of the in-vehicle announcement and at the end of the in-vehicle announcement.

<Audio output device>
FIG. 3 is a block diagram showing a configuration example of the audio output device 30 according to the embodiment. The audio output device 30 is a device having an operating unit that, when operated, emits a sound that hinders the listening of audio in the audible band broadcast from the broadcasting device 10. The audio output device 30 includes a device that outputs audio for the listener to hear, such as headphones, a portable music player, a television, a radio, and an audio device. Alternatively, the audio output device 30 is a device that generates a large amount of noise during operation, such as a ventilation fan, a kettle, a hair dryer, and a vacuum cleaner. In the present embodiment, the audio output device 30 is a headphone used by a train passenger. The audio output device 30 has a content reproduction function of content including audio such as video or music, for example. In the audio output device 30, the playback control unit (output control unit) 40 controls the audio output of the content when the broadcasting device 10 announces in the vehicle. The audio output device 30 includes a sound collection microphone (user sound collection unit) 31, a reproduction speaker (user audio output unit) 32, a content storage unit 33, and a reproduction control unit 40.

The sound collecting microphone 31 can collect sound signals outside the audible band broadcast from the broadcasting device 10. In the present embodiment, the sound collecting microphone 31 collects sound signals in the audible band and outside the audible band output from the broadcasting speaker 12 of the broadcasting device 10. The sound collecting microphone 31 constantly acquires audio signals in the audible band and out of the audible band while the audio output device 30 is operating or the content is being reproduced. The sound collecting microphone 31 outputs the acquired audible band and the sound signal outside the audible band to the broadcast sound acquisition unit 41 of the reproduction control unit 40.

By operating, the reproduction speaker 32 functions as an operating unit capable of emitting a sound to the extent that it hinders the hearing of the sound in the audible band broadcast from the broadcasting device 10. In other words, the operating unit is a reproduction speaker 32 capable of outputting an audio signal. In the present embodiment, the reproduction speaker 32 is a speaker that outputs the sound of the reproduced content. The reproduction speaker 32 outputs the sound of the content based on the sound signal output from the reproduction output processing unit 42 of the reproduction control unit 40.

The content storage unit 33 is, for example, a semiconductor memory element such as a RAM (Random Access Memory), a ROM (Read Only Memory), or a flash memory, or a storage device such as a hard disk or an optical disk. Alternatively, the content storage unit 33 may be an external storage device that is wirelessly connected. The content storage unit 33 stores audio data of the content.

The audio data of the content is, for example, audio data of the audio content, audio data of the video content, and the like.

The reproduction control unit 40 is, for example, an arithmetic processing unit composed of a CPU or the like. The reproduction control unit 40 loads a program stored in a storage unit (not shown) into the memory and executes an instruction included in the program. The playback control unit 40 is a playback speaker that is an operating unit so that when the sound collection microphone 31 picks up an audio signal outside the audible band, the sound in the audible band broadcast from the broadcasting device 10 can be easily heard. The operation of 32 is controlled to control the level of the emitted sound. In the present embodiment, the reproduction control unit 40 controls the output of the audio signal from the reproduction speaker 32 when the sound collection microphone 31 collects an audio signal outside the audible band. The reproduction control unit 40 includes a broadcast sound acquisition unit 41 and a reproduction output processing unit 42. The reproduction control unit 40 includes an internal memory (not shown), and the internal memory is used for temporary storage of data in the reproduction control unit 40 and the like.

The broadcast audio acquisition unit 41 acquires the audio data announced in the vehicle. More specifically, the broadcast audio acquisition unit 41 executes A / D conversion processing on the audio signals in the audible band and the audio signals outside the audible band output by the sound collection microphone 31 to acquire audio data which is digital data. The broadcast audio acquisition unit 41 outputs the acquired audio data in the audible band and out of the audible band to the reproduction output processing unit 42.

The reproduction output processing unit 42 executes a decoding process and a D / A conversion process on the audio data of the content stored in the content storage unit 33, and outputs the audio signal to the reproduction speaker 32.

The reproduction output processing unit 42 processes the audio signals acquired by the broadcast audio acquisition unit 41 in the audible band and out of the audible band, and determines the presence / absence of the audio signal outside the audible band. When the reproduction output processing unit 42 determines that the audio signal outside the audible band has been acquired, the reproduction output processing unit 42 outputs the audio signal for which the audio output of the content is controlled to the reproduction speaker 32 so that the announcement in the vehicle can be easily heard.

Controlling the audio output of the content means, for example, reducing the volume during content playback, turning off the function of canceling the surrounding audio noise (hereinafter referred to as "noise canceling function"), or turning off the peripheral audio noise. The function of capturing audio is turned on (hereinafter referred to as "audio capture function"). Volume reduction includes muting the audio and reducing the volume.

For example, when the reproduction output processing unit 42 determines that the audio signal outside the audible band has been acquired, the volume of the audio signal output from the reproduction speaker 32 may be reduced. For example, when the reproduction output processing unit 42 determines that the audio signal outside the audible band has been acquired, the noise canceling function of the reproduction speaker 32 may be turned off. For example, when the reproduction output processing unit 42 determines that the audio signal outside the audible band has been acquired, the audio capture function of the reproduction speaker 32 may be turned on.

When the audio signal outside the audible band matches that stored in the content storage unit 33, the playback output processing unit 42 determines that the audio signal outside the audible band has been acquired, and outputs the audio of the content. You may control it.

After acquiring the audio signal outside the audible band and controlling the audio output of the content, the reproduction output processing unit 42 releases the control of the audio output of the content from the reproduction speaker 32 when the end condition is satisfied. Restores the audio output of the content of.

When the end condition is satisfied, for example, when a predetermined time elapses after controlling the audio output of the content, when the output of the audio signal outside the audible band is stopped, or when the audio output of the content is controlled, the output of the audio signal is out of the audible band. When the audio signal of the above is acquired, or when the announcement in the vehicle from the broadcast speaker 12 is finished, and the like.

For example, when the sound collecting microphone 31 picks up the audio signal outside the audible band and then stops picking up the sound signal outside the audible band, the playback output processing unit 42 outputs the sound from the playback speaker 32. , The control of the output of the audio signal may be terminated. For example, the playback output processing unit 42 picks up the audio signal of the first waveform outside the audible band by the sound collecting microphone 31, and then picks up the audio signal of the second waveform outside the audible band, which is different from the first waveform. If so, the control of the output of the audio signal output from the reproduction speaker 32 may be terminated.

<Processing in broadcasting system>
Next, the flow of processing in the reproduction control unit 40 of the audio output device 30 of the broadcasting system 1 will be described with reference to FIG. FIG. 4 is a flowchart showing a processing flow in the audio output device 30 according to the embodiment.

The train conductor makes an in-vehicle announcement using the broadcasting device 10, for example, when arriving at a station, departing from a train, or in an emergency. At that time, the audio signal outside the audible band is output from the broadcast speaker 12 before the audio signal in the audible band, which is an announcement in the vehicle, is output.

More specifically, the conductor of the train turns on the switch of the broadcasting microphone 11 in the conductor's room when making an announcement in the train. When the switch of the broadcasting microphone 11 is turned on, an audio signal outside the audible band is output from the broadcasting speaker 12, and the broadcasting microphone 11 starts acquiring the audio signal spoken by the driver. Inside the train, the broadcast speaker 12 outputs an audio signal outside the audible band that passengers cannot hear and an audio signal in the audible band spoken by the conductor that passengers can hear.

The audio output device 30 collects audio signals outside the audible band broadcast from the broadcasting device 10. Then, the audio output device 30 controls the output of the audio signal output from the reproduction speaker 32 when the sound pickup microphone 31 picks up the audio signal outside the audible band. More specifically, the audio output device 30 performs processing according to the flowchart shown in FIG. Hereinafter, the flowchart shown in FIG. 4 will be described.

The reproduction control unit 40 determines whether or not an audio signal outside the audible band has been input (step S101). More specifically, the reproduction control unit 40 determines whether or not the audio signal acquired by the broadcast audio acquisition unit 41 includes an audio signal outside the audible band. When the reproduction control unit 40 determines that an audio signal outside the audible band has been input (Yes in step S101), the reproduction control unit 40 proceeds to step S102. If the reproduction control unit 40 does not determine that an audio signal outside the audible band has been input (No in step S101), the reproduction control unit 40 executes the process of step S101 again.

The reproduction control unit 40 controls the audio output from the reproduction speaker 32 so that the announcement in the vehicle can be easily heard (step S102). More specifically, the playback control unit 40 reduces the volume of content playback, turns off the noise canceling function, or makes it easier to hear the announcement in the vehicle by the playback output processing unit 42. The audio output of content reproduction from the reproduction speaker 32 is controlled by turning on the capture function or the like. The reproduction control unit 40 proceeds to step S103.

The reproduction control unit 40 determines whether or not to end the control of the audio output from the reproduction speaker 32 (step S103). More specifically, the playback control unit 40 has, for example, when a predetermined time has elapsed after controlling the audio output of the content, when the audio signal outside the audible band is acquired again, or when the announcement in the vehicle is finished. When is detected, it is determined that the control of the audio output from the playback speaker 32 is finished (Yes in step S103), and the process proceeds to step S104. For example, if none of the above applies, the reproduction control unit 40 determines that the control of the audio output from the reproduction speaker 32 is not terminated (No in step S103), and executes the process of step S103 again. ..

The reproduction control unit 40 releases the control of the audio output from the reproduction speaker 32 (step S104). More specifically, the reproduction control unit 40 returns the audio output to the state before being controlled by the reproduction output processing unit 42. The playback control unit 40 controls the sound output from the playback speaker 32, for example, by returning the volume of the content playback to the original level, returning the noise canceling function to ON, or returning the audio capture function to OFF. To cancel. The reproduction control unit 40 ends the process.

The audio output control process will be described with reference to FIGS. 5 to 7. FIG. 5 is a diagram illustrating an example of audio output control processing. FIG. 6 is a diagram illustrating another example of the audio output control process. FIG. 7 is a diagram illustrating another example of the audio output control process. T1 is the start time of the in-vehicle announcement, and T2 is the end time of the in-vehicle announcement. The audio signal outside the audible band is output before T1. After the audio signal outside the audible band is output, the in-vehicle announcement is started at T1. In the audio output device 30, the content is reproduced even before the audio signal outside the audible band is output.

In FIG. 5, an audio signal outside the audible band is output before the in-vehicle announcement is broadcast in T1. As a result, the audio output device 30 executes the mute function from T1 to T2. The user using the sound output device 30 which is a headphone can easily hear the announcement in the vehicle by muting the sound output from the playback speaker 32. The audio output device 30 determines that the end condition is satisfied when, for example, a predetermined time has elapsed after the mute function is executed, or when the announcement in the vehicle from the broadcast speaker 12 is completed. As a result, in the audio output device 30, after the in-vehicle announcement is completed, the audio output from the reproduction speaker 32 returns to the output state before T1 after T2.

In FIG. 6, the audio signal outside the audible band is continuously output from before the broadcast of the in-vehicle announcement in T1 until the end of the in-vehicle announcement in T2. The audio output device 30 determines, for example, that the end condition is satisfied when the output of the audio signal outside the audible band is stopped. As a result, the audio output device 30 executes the mute function from T1 to T2.

In FIG. 7, an audio signal is output outside the audible band 1 before the in-vehicle announcement is broadcast in T1. Before the end of the in-vehicle announcement at T2, the audio signal of the out-of-audible band 2 having a frequency band different from that before the in-vehicle announcement is broadcast is output. In the audio output device 30, for example, when the audio signal of the audible band 2 is acquired while controlling the audio output of the content, it is determined that the end condition is satisfied. As a result, the audio output device 30 executes the mute function from T1 to T2.

<Effect>
As described above, in the present embodiment, when the audio output device 30 collects the audio signal outside the audible band broadcast from the broadcasting device 10, the audio of the content reproduction can be controlled. According to the present embodiment, when the audio output device 30 collects a broadcast audio signal outside the audible band, it is possible to control the audio output device 30 to reduce the audio of the content reproduction. According to the present embodiment, the audio output device 30 can control to turn off the noise canceling function when the broadcast audio signal outside the audible band is picked up. According to the present embodiment, when the audio output device 30 picks up a broadcast audio signal outside the audible band, it can be controlled to capture surrounding audio. In this way, according to the present embodiment, when using a device that emits sound during operation, it is possible to reduce the risk of missing a broadcast due to the sound emitted by the device.

According to this embodiment, the risk of missing a broadcast is reduced while the user continues to use the sound output device 30 such as headphones without stopping or removing the sound output device 30 from the ear so as not to miss the announcement in the vehicle. can do.

In the present embodiment, when the audio signal outside the audible band is stored in the content storage unit 33, it is determined that the audio signal outside the audible band has been acquired. According to this embodiment, it is possible to control the sound of content reproduction more appropriately.

In the present embodiment, when broadcasting from the broadcasting device 10, both the audible band and the audio signal outside the audible band are output. According to the present embodiment, when the audio signal outside the audible band is no longer picked up, it can be determined that the broadcast has ended. According to the present embodiment, the end timing of the content reproduction control can be appropriately determined.

The present embodiment outputs an audio signal outside the audible band in a frequency band different from that at the end of broadcasting from the broadcasting device 10 and at the start of broadcasting. According to the present embodiment, when an audio signal outside the audible band in a frequency band different from that at the start of broadcasting is picked up, it can be determined that the broadcasting has ended. According to the present embodiment, the end timing of the content reproduction control can be appropriately determined.

In this embodiment, the user of the voice output device 30 can easily hear the in-vehicle announcement without raising the volume of the in-vehicle announcement.

In the present embodiment, the audio signal outside the audible band is a frequency band that cannot be normally heard. According to the present embodiment, the user of the voice output device 30 can easily hear the announcement in the vehicle without letting the passengers of the train hear an unnecessary voice signal.

Although the audio output device 30 according to the present invention has been described so far, it may be implemented in various different forms other than the above-described embodiment.

Each component of the illustrated audio output device 30 is functionally conceptual and does not necessarily have to be physically configured as shown. That is, the specific form of each device is not limited to the one shown in the figure, and all or part of each device is functionally or physically dispersed or integrated in an arbitrary unit according to the processing load and usage status of each device. You may.

The configuration of the audio output device 30 is realized, for example, by a program loaded in a memory as software. In the above embodiment, it has been described as a functional block realized by cooperation of these hardware or software. That is, these functional blocks can be realized in various forms by hardware only, software only, or a combination thereof.

The above-mentioned components include those that can be easily assumed by those skilled in the art and those that are substantially the same. Further, the above configurations can be combined as appropriate. Further, various omissions, substitutions or changes of the configuration can be made without departing from the gist of the present invention.

In the above, the audio output device 30 has been described as a headphone, but it can also be applied to other devices. For example, when the audio output device 30 is an electric device that generates noise such as a ventilation fan, a kettle, a hair dryer, and a vacuum cleaner, the operating unit is a drive source such as a motor of these electric devices. Then, when an audio signal outside the audible band is picked up, the operation of the operating unit is stopped or the number of rotations is reduced so that the broadcast audio in the audible band can be easily heard, and the emitted sound is reduced. Let me. For example, when the audio output device 30 is an electric device that outputs sound such as a television, a radio, and an audio device, the operating unit controls the output of the sound from the speakers of these electric devices to emit the sound. Reduce.

The above-mentioned broadcasting speaker 12 may be capable of outputting audio signals in the audible band and outside the audible band, or may be capable of outputting audio signals in the audible band and the first speaker for broadcasting capable of outputting audio signals in the audible band, and audio signals outside the audible band. It may be configured to include a second speaker for broadcasting capable of outputting.

The above-mentioned sound collecting microphone 31 may be capable of collecting sound signals in the audible band and outside the audible band, or may be capable of collecting sound signals in the audible band, and the first microphone for sound collecting and the audible band. It may be configured to include a second microphone for sound collection capable of collecting an outside audio signal.

1 Broadcasting system 10 Broadcasting equipment 11 Broadcasting microphone 12 Broadcasting speaker (broadcasting audio output unit)
20 Broadcast control unit 21 Broadcast audio acquisition unit 22 Broadcast output processing unit 30 Audio output device 31 Sound collection microphone (user sound collection unit)
32 Playback speaker (user audio output unit)
33 Content storage unit 40 Playback control unit (output control unit)
41 Broadcast audio acquisition unit 42 Playback output processing unit

Claims (9)

A sound pickup unit for users that can pick up audio signals outside the audible band broadcast from the broadcasting device,
By operating, an operating unit capable of emitting a sound that hinders the hearing of audio in the audible band broadcast from the broadcasting device, and
When the user sound collecting unit picks up an audio signal outside the audible band, the operation of the operating unit is controlled so that the sound in the audible band broadcast from the broadcasting device can be easily heard. The output control unit that controls the level and
A voice output device. The operation unit is a user audio output unit capable of outputting an audio signal.
The output control unit controls the output of the voice signal from the user voice output unit when the user sound pick-up unit picks up a voice signal outside the audible band.
The audio output device according to claim 1. The output control unit reduces the volume of the audio signal output from the user audio output unit.
The audio output device according to claim 2. The output control unit stops the function of canceling the peripheral voice noise in the user voice output unit.
The audio output device according to claim 2. The audio output device according to any one of claims 2 to 4,
A broadcasting device having a broadcasting audio output unit that outputs an audible band for broadcasting and an audio signal outside the audible band, and
A broadcasting system equipped with. The broadcast audio output unit outputs an audio signal outside the audible band together with the audio signal in the audible band.
The output control unit outputs the user's audio output unit when the user's sound collecting unit collects the audio signal outside the audible band and then stops collecting the audio signal outside the audible band. The control of the output of the audio signal is terminated.
The broadcasting system according to claim 5. The broadcast audio output unit can output an audio signal outside the audible band having different waveforms at the start and end of the output of the audio signal in the audible band.
When the output control unit picks up a sound signal of the first waveform outside the audible band and then picks up a sound signal of the second waveform different from the first waveform outside the audible band. , Terminates the control of the output of the audio signal output from the user audio output unit.
The broadcasting system according to claim 5 or 6. A step of collecting an audio signal in the audible band by a user sound collecting unit capable of collecting an audio signal outside the audible band broadcast from a broadcasting device.
When an audio signal outside the audible band is picked up, it operates so that the sound in the audible band broadcast from the broadcasting device can be easily heard, thereby hindering the hearing of the sound in the audible band broadcast from the broadcasting device. An output control step that controls the operation of an operating unit capable of producing a sound to the extent that the sound is produced, and controls the level of the sound.
Audio output method including. A broadcasting method using the broadcasting system according to any one of claims 5 to 7.
A step of outputting an audio signal outside the audible band before outputting the audio signal of the audible band from the broadcast audio output unit, and a step of outputting the audio signal outside the audible band.
A step of collecting an audio signal outside the audible band broadcast from the broadcasting device, and
When the user sound collecting unit picks up a voice signal outside the audible band, a step of controlling the output of the voice signal output from the user voice output unit and a step of controlling the output of the voice signal.
Broadcast methods including.

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