JP7228996B2 - content playback device - Google Patents

Description

The present invention relates to a content reproduction device.

A content reproduction device that reproduces content inside a vehicle is known. For example, Patent Literature 1 describes a specific configuration of a content reproduction device.

The content playback device described in Patent Document 1 captures an image of the entire vehicle interior using an imaging device installed in the vehicle interior, and identifies the positions of the occupants (driver's seat, passenger's seat, rear seat) from the image data obtained by the imaging. content corresponding to the identified position of the occupant, and reproduces the selected content in the vehicle compartment. In Patent Literature 1, for example, when it is detected that an occupant has sat in a rear seat, a DVD (Digital Versatile Disc) or TV (Television) video is selected as content to be reproduced on the rear display, and the selected video is displayed. Played on the rear display.

JP 2010-13054 A

In Patent Literature 1, for example, even after an occupant sitting in the rear seat has fallen asleep, the image on the rear display continues to be reproduced and the sound is output to the speaker even though no occupant can see the image on the rear display. will continue to be output from In such a situation, other occupants (such as the driver or a passenger sitting in the front passenger seat) may stop the playback of the video (and its audio), or the audio output from the speaker may sometimes switch to When stopping video playback or switching music, for example, it is necessary for a passenger sitting in the front passenger seat to operate the content playback device, or for the driver to operate the content playback device while the vehicle is stopped.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and its object is to provide a content reproduction system capable of automatically changing the content according to the situation of the occupant without forcing the occupant to operate. to provide the equipment.

A content reproduction device according to an embodiment of the present invention is provided in a vehicle, is a device capable of reproducing content, and sets a value indicating a priority to each of a plurality of occupants in the vehicle. A setting unit, a monitoring unit for monitoring the gradual sleep-related state of each of a plurality of occupants for which a value indicating priority is set, and a gradual change in the sleep-related state monitored by the monitoring unit a modifier for increasing or decreasing a value indicative of the priority of at least one occupant present in the vehicle based on the modification unit, after the value indicative of the priority of the at least one occupant is increased or decreased by a control unit for changing content being reproduced based on a value indicating priority of each of the plurality of occupants.

According to the content reproduction device configured in this way, it is possible to automatically change the content according to the situation of the passenger without imposing an operation burden on the passenger.

The content reproduction device may further include a storage unit that associates and stores a value indicating a priority to each passenger in the vehicle. In this case, the setting unit discriminates each of the plurality of occupants who have boarded the vehicle, reads a value indicating the priority of each of the plurality of occupants from the storage unit based on the determination result, and stores the read priority. Set the indicated value to each of the multiple occupants.

According to such a configuration, priority is automatically set for each occupant in the vehicle.

The setting unit can set a value indicating a prescribed priority for an unidentifiable passenger, which is lower than that for an identifiable passenger.

According to such a configuration, for example, it becomes easier to reproduce the content preferred by the occupant that can be determined by the setting unit.

The content reproduction device may be connected to a photographing device capable of photographing the interior of the vehicle. In this case, the setting unit determines each of the plurality of occupants based on the captured image data output from the imaging device.

According to such a configuration, each occupant can be identified using image recognition technology.

The content reproduction device may be connected to a sensor for detecting the sleep-related gradual state of each of the plurality of occupants. In this case, the monitoring unit monitors the sleeping state of each of the multiple occupants by monitoring the output of the sensor.

According to such a configuration, it is possible to automatically change the content in accordance with the sleeping state of the passenger without imposing an operational burden on the passenger.

The monitoring unit classifies the sleeping state of each of the occupants into four stages: an awake state, a falling asleep sign state in which signs of falling asleep are observed, a falling asleep state, and a sleeping state. The control unit may be configured to output a predetermined warning sound regardless of the value indicating the priority of each of the plurality of occupants when the monitoring unit detects a sign of falling asleep, falling asleep, or sleep of the driver of the vehicle. good.

According to such a configuration, it is possible to return the driver to an alert state by the warning sound.

The content reproduction device may be connected to a plurality of speakers set at different positions inside the vehicle interior. In this case, the content is content including at least sound, and the sound of the content is output from each of the plurality of speakers. Also, the control unit changes the content being reproduced based on the value indicating the priority of each of the plurality of passengers after the value indicating the priority of at least one passenger is increased or decreased by the changing unit. At the same time, change the volume ratio between the plurality of speakers.

According to such a configuration, it is possible to automatically change the content and automatically change the volume ratio between the speakers according to the state of the passenger without imposing an operation burden on the passenger.

The control unit may be configured to change the content being played back to the content corresponding to the occupant with the highest priority value among the occupants riding in the vehicle.

According to such a configuration, it is possible to change the content being reproduced to the content corresponding to the occupant who should have the highest priority at present.

For example, the control unit changes the content even if the value indicating the priority of at least one passenger is increased or decreased by the change unit until a certain period of time elapses after the content being reproduced is changed. do not have.

According to such a configuration, since the content is not changed for at least a certain period of time, the occupant does not feel uncomfortable due to frequent changes of the content.

According to one embodiment of the present invention, there is provided a content playback device capable of automatically changing content according to the situation of the passenger without imposing an operational burden on the passenger.

1 is a diagram schematically showing a vehicle in which a content reproduction system according to one embodiment of the invention is installed; FIG. 1 is a block diagram showing the configuration of a content reproduction system according to one embodiment of the present invention; FIG. FIG. 4 is a diagram showing a flowchart of priority registration processing for registering priority information of each passenger, which is processing executed by the system controller of the content reproduction device included in the content reproduction system according to the embodiment of the present invention. FIG. 4 is a diagram showing a priority table stored in the memory of the content reproduction device according to one embodiment of the present invention; FIG. FIG. 10 is a flowchart of content change processing that is executed by the system controller of the content reproduction device according to the embodiment of the present invention and that changes the content being reproduced based on the priority information of each passenger. 6 is a diagram conceptually expressing the configuration of a system controller that executes the content change processing of FIG. 5 with functional blocks; FIG.

A content reproduction system according to an embodiment of the present invention will be described below with reference to the drawings. A content reproduction system according to an embodiment of the present invention is a system installed in a vehicle and configured to reproduce content inside the vehicle.

In this embodiment, "content" is information, including at least audio, transmitted over a network or stored locally. Examples include TV programs broadcast by broadcasting stations, radio programs, video content and music stored in recording media, and video content and music delivered by streaming.

FIG. 1 is a diagram schematically showing a vehicle A in which a content reproduction system 1 according to one embodiment of the invention is installed. In FIG. 1, a part of the body of the vehicle A is shown as a transparent body so that the content reproduction system 1 installed inside the vehicle A can be seen.

As shown in FIG. 1, the content reproduction system 1 has a content reproduction device 10, a photographing device 20, and speakers _SPFR , _SPFL , _SPRR , and _SPRL .

The photographing device 20 is installed, for example, in front of the driver's seat and front passenger's seat and at a position passing through the center line of the interior of the vehicle A (near the content reproduction device 10, near the rearview mirror, near the rearview mirror, etc.). is a wide-angle camera capable of capturing all the passengers sitting on each seat within the angle of view, and outputs captured image data to the content reproduction device 10.例文帳に追加

The speakers SP _FR , SP _FL , SP _RR , and SP _RL are connected to the content reproduction device 10, and are connected to the driver side door D _FR , the passenger side door D FL, and the rear seat right side door D _FR , respectively. _DRR , installed in the door portion _DRL on the left side of the rear seat.

In this embodiment, the speaker SP is installed on the side of the vehicle interior, but the speaker SP may be installed on the ceiling, headrest, or the like.

In this embodiment, for the sake of convenience, constituent elements with subscripts ( _FR , _FL , _RR , _RL ) may be referred to as "speakers SP _FR , SP _FL , SP _RR , SP _RL ", and if it is not necessary to distinguish them, they are not subscripted, for example, "speaker SP".

The content reproduction device 10 is installed, for example, on a dashboard, and is equipped with disk media such as CDs (Compact Discs) and SACDs (Super Audio CDs), and storage devices such as HDDs (Hard Disk Drives) and USBs (Universal Serial Bus). Contents such as music stored in media and radio programs are output to a speaker SP. As a result, content such as music and radio programs is played back inside the vehicle.

FIG. 2 is a block diagram showing the configuration of the content reproduction system 1 according to one embodiment of the present invention. As shown in FIG. 2, the content reproduction apparatus 10 includes a system controller 102, a signal processing section 104, a volume control section 106, a power amplifier 108, a memory 110, an operation section 112 and a display section 114. Note that FIG. 2 illustrates main components necessary for explaining the present embodiment, and some components such as a housing, which is a general component of a content reproduction device, are not illustrated as appropriate. omitted.

A plurality of source devices 30 are connected to the content reproduction device 10 . Examples of the source device 30 include navigation devices, audio devices (CDs, DVDs, HDDs, TV tuners, radio tuners, etc.), and information processing terminals such as tablets and smart phones. The content reproduction device 10 receives an audio signal that constitutes content (voice guidance output from the source 30 device, music, telephone voice, radio broadcast, voice on the Internet, etc.).

The occupant of the vehicle A can operate the operation unit 112 to specify the content to be reproduced. The operation of designating content includes, for example, an operation of designating the source device 30 itself, an operation of designating a piece of music for an audio device, an operation of designating a broadcasting station for a radio tuner, and the like. Thus, the passenger can operate the operation unit 112 to arbitrarily select the desired content.

The signal processing unit 104 subjects the audio signal input from the source device 30 to various signal processing such as equalizing processing and tone control processing, and outputs the processed signal to the volume control circuit 106 .

An occupant of vehicle A can operate the operation unit 112 to instruct the system controller 102 to change the volume value. The system controller 102 instructs the volume control circuit 106 to change the volume value in accordance with an instruction from the operation unit 112 . The volume control circuit 106 converts the audio signal input from the signal processing unit 104 with an amplification factor corresponding to the changed volume value instructed by the system controller 102 (with the same amplification factor as before if there is no such instruction). It is amplified and output to power amplifier 108 .

The power amplifier 108 power-amplifies the audio signal input from the volume control circuit 106 to a level that the speaker SP can output as sound audible to humans. The power-amplified audio signal is output to each speaker SP. Accordingly, the occupant of vehicle A can listen to voice guidance, music, telephone voice, radio broadcast, voice on the Internet, and the like.

The display unit 114 displays, for example, a navigation screen and other various types of information (such as music being played and radio program information).

The content reproduction device 10 monitors the situation of each passenger of the vehicle A, changes the priority information associated with each passenger based on the monitoring results, and based on the changed priority information of each passenger Configured to change the content being played. FIG. 3 shows a flowchart of priority registration processing for registering priority information of each passenger. This priority registration process is executed under the control of the system controller 102 .

For example, when an occupant of vehicle A performs a predetermined operation on the operation unit 112, the content reproduction apparatus 10 shifts to a priority registration mode for registering information on the priority of the occupant.

The photographing device 20 constantly or periodically photographs the interior of the vehicle A while the content reproduction system 1 is running, and outputs photographed image data obtained by photographing to the system controller 102 . When shifting to the priority registration mode, the system controller 102 generates occupant identification data included in the photographed image data input from the photographing device 20 (step S11). Although the detailed description is omitted because it is a well-known technique, for example, the photographed image data input from the photographing device 20 is analyzed, the feature amount of the occupant included in the photographed image data is extracted, and the extracted feature amount is used as the occupant. A general image recognition technique can be used as the discrimination data of .

The system controller 102 identifies the coordinates at which the occupant appears when analyzing the photographed image data, estimates the seat in which the occupant is seated from the identified coordinates, and displays a list of the estimated seats on the display unit 114 (step S12). By operating the operation unit 112, the occupant designates a seat (in other words, the occupant sitting on this seat) from this list, and sets the priority information (for example, 0) for the designated seat (occupant). up to 255) and the content to be preferentially reproduced can be specified.

When an operation is performed to determine the priority information and the content to be preferentially reproduced, the system controller 102 acquires the determined priority information, the content to be preferentially reproduced, and the identification data and names of the passengers corresponding thereto. This is associated and stored in the memory 110 (priority table 110A) (step S13). The names of the crew members may be simple names such as crew members 01, 02, 03, .

That is, the memory 110 (priority table 110A) operates as a storage unit that associates and stores priority information with respect to each passenger riding in the vehicle A. FIG.

By operating the operation unit 112, the passenger can arbitrarily edit the record of each passenger registered in the priority table 110A.

FIG. 4 shows an example of the priority table 110A. In FIG. 4, the records of the crew members 01 to 05 are registered in the priority table 110A as a result of executing the priority registration process of FIG. Moreover, there is a case where a passenger who is not registered in the priority table 110A gets on the vehicle A. As shown in FIG. 4, a guest (child) record and a guest (adult) record are registered in advance in the priority table 110A for unregistered passengers.

In the priority table 110A, as shown in FIG. 4, content to be played with priority can be registered in units of categories such as anime songs, Japanese music, Western music, and radio. registration is also possible.

FIG. 5 shows a flowchart of content change processing for changing the content being reproduced based on information on the priority of each passenger on board the vehicle A. In FIG. This content change processing is executed under the control of the system controller 102 . FIG. 6 is a diagram conceptually expressing the configuration of the system controller 102 that executes the content change processing of FIG. 5 using functional blocks.

The system controller 102 starts executing the content change processing in FIG. 5 when playback of some content is started. In the content change process of FIG. 5, the content being reproduced is changed based on the priority information of each passenger on board the vehicle A. may be determined based on information on the priority of each occupant.

The system controller 102 (priority setting unit 102A in FIG. 6) performs matching between the photographed image data input from the photographing device 20 and the judgment data of each passenger stored in the priority table 110A, each passenger is discriminated (step S21). Since matching is a general image recognition technique, detailed description of matching is omitted.

The priority setting unit 102A reads the priority information of the occupant determined in the determination process of step S21 from the priority table 110A, and sends the read priority information to the occupant (in other words, the determined occupant is currently sitting). seat) (step S22). That is, the priority setting unit 102A automatically sets the priority for each passenger using the information registered in the priority table 110A.

In the discrimination process of step S21, a passenger who is not registered in the priority table 110A becomes a matching error (cannot be discriminated). For such unidentifiable passengers, specified priority information (for example, priority information of the guest record shown in FIG. 4) is set in the setting process of step S22.

In this embodiment, passengers registered in the priority table 110A (distinguishable passengers) are prioritized over passengers not registered in the priority table 110A (undistinguishable passengers) (in other words, content preferred by the distinguishable passengers). is easy to play), guest records are assigned extremely low priority information. Therefore, in the setting process of step S22, for the occupants who cannot be discriminated in the discrimination process of step S21, the specified priority information, which is lower than that of the identifiable occupants, is set.

In another embodiment, when giving priority to passengers not registered in the priority table 110A (distinguishable passengers) over passengers registered in the priority table 110A (distinguishable passengers), a high value is added to the guest record. priority information may be assigned.

In this embodiment, guest records are registered for children and adults. The priority setting unit 102A can distinguish whether the occupant in the captured image is a child or an adult based on the face, physique, etc., even if the occupant is not registered in the priority table 110A. Therefore, in the setting process of step S22, the priority information of the guest (child) record is set for the child passenger who is not registered in the priority table 110A, and the adult passenger who is not registered in the priority table 110A is set. Information about the priority of guest (adult) records is set.

In this way, the priority setting unit 102A operates as a setting unit that sets priority information for each passenger who has boarded the vehicle A. FIG.

Although details will be described later, in the present embodiment, the priority information of the occupant is changed depending on the sleeping state of the occupant. As an example, the information about the priority of the sleeping occupant is changed to a value lower than the initial value (the value stored in the priority table 110A). In order to match this, for example, when a child is asleep when getting on the car, the priority information of this child is set not to the initial value but to a value (value lower than the initial value) according to the sleep state.

After the setting process of step S22, the system controller 102 (occupant monitoring unit 102B in FIG. 6) sets the priority information in the setting process of step S22 based on the captured image data (moving image data) input from the imaging device 20. The sleeping state of the occupants of the set seats is determined (step S23). Specifically, the states related to sleep are an awake state, a sleep onset sign state in which a sign of sleep onset is observed, a sleep onset state, and a sleep state. Although the detailed description is omitted because it is a well-known technique, for example, the photographed image data input from the photographing device 20 is analyzed, and the state related to sleep is determined from the degree of eye opening and body fluctuation of the occupant included in the photographed image data. can be determined.

That is, the photographing device 20 operates as a sensor for detecting the sleeping state of each passenger on board the vehicle A. FIG. The occupant monitoring unit 102B operates as a monitoring unit that monitors the sleeping state of each occupant on board the vehicle A by monitoring the output of this sensor.

Such a sensor is not limited to the imaging device 20 . For example, a temperature sensor may be provided on the seat and used as a sensor for detecting the sleeping state of each passenger. In this case, the body temperature of the passenger sitting on the seat is detected, and the sleeping state is determined from the detected change in body temperature of the passenger. Also, an optical or radio wave pulse sensor may be used as a sensor for detecting the sleeping state of each passenger. In this case, the pulse of the occupant sitting on the seat is detected, and the state of sleep is determined from the detected change in the pulse of the occupant.

When the determination result of the sleeping state of all the occupants is the same as the previous determination result (step S24: same as last time), the determination process by the occupant monitoring unit 102B is executed again. On the other hand, if the determination result of the sleeping state of at least one passenger is different from the previous determination result (step S24: different from last time), the process of this flowchart proceeds to step S26.

Note that when the system controller 102 (control unit 102D in FIG. 6) determines that the driver is in a sleep onset symptom state, a sleep onset state, or a sleep state (step S24: driver sleeping, etc.), the previous and current determination results Regardless of whether it is different or not, the warning sound data stored in the memory 110 is read, and this warning sound is forced to be output from all the speakers SP (or the driver's seat side speaker SP _FR ) (step S25). For example, the volume of the warning sound increases in the order of the sleeping state, the falling asleep state, and the falling asleep state. By forcibly outputting such a warning sound, it is possible to bring the driver back to an alert state.

The system controller 102 (priority changing section 102C in FIG. 6) changes the priority information of the passengers based on the determination results of steps S23 and S24 (step S26). Specifically, when the priority change unit 102C in FIG. 6 detects an occupant whose sleep-related state has changed from the determination results of steps S23 to S24 (for example, an occupant who has transitioned from an awake state to a sleeping state), Change the priority information of detected occupants. An example of changing the priority information is shown below.

[Example of changing priority information]
(1) When the occupant shifts from an awake state to a falling asleep state, the priority of the occupant is lowered by n1 (value n1 is a natural number).
(2) When the occupant shifts from the falling asleep symptom state to the falling asleep state, the priority of the occupant is lowered by n2 (value n2 is a natural number).
(3) When the occupant shifts from wakefulness to sleepiness, the priority of the occupant is lowered by n3 (=value n1+value n2).
(4) When the occupant transitions from an awake state, a sleep onset state, or a sleep onset state to a sleep state, the priority of the occupant is set to zero.
(5) When the occupant shifts from the falling asleep symptom state to the awake state, the priority of the occupant is increased by n1.
(6) The occupant shifts from the falling asleep state to the falling asleep state, and raises the priority of the occupant by n2.
(7) When the occupant shifts from the sleeping state to the awake state, the priority of the occupant is increased by n3.
(8) When the occupant transitions from sleep to wakefulness, the occupant's priority is reset to the initial value.
(9) The occupant transitions from the sleep state to the falling asleep state The priority of the occupant is changed to a value obtained by subtracting the value n1 from the initial value.
(10) Passenger shifts from sleep state to sleep state Change the priority of the passenger to a value obtained by subtracting the value n3 from the initial value.

That is, the priority change unit 102C provides information on the priority of at least one passenger on board the vehicle A based on the monitoring result (more specifically, the determination result of the sleeping state of each passenger) by the passenger monitoring unit 102B. It operates as a modification unit that modifies the .

The control unit 102D changes the content being reproduced based on the priority information of each passenger on board the vehicle A (step S27). Specifically, when the priority change unit 102C changes the priority information of at least one passenger, the control unit 102D compares the priority information of each passenger, and prioritizes the content being reproduced. content according to the occupant with the highest priority information value (However, if the occupant with the highest priority information value does not change before and after the not.). For example, if the content associated with the occupant with the highest priority information value is an anime song, song data tagged with an anime song is randomly played back. In this way, the content being reproduced is automatically changed to the content corresponding to the occupant who should have the highest priority at present.

That is, the control unit 102D operates as a control unit that changes the content being reproduced based on the priority information of each passenger after the priority information of at least one passenger is changed.

As described above, according to the content reproduction device 10 and the content reproduction system 1 according to the present embodiment, it is possible to automatically change the content according to the passenger's situation (sleeping state) without imposing an operational burden on the passenger. It becomes possible.

It should be noted that if the content being reproduced is changed frequently in a short period of time, there is a risk that the passenger may feel uncomfortable. Therefore, the control unit 102D, for example, until a certain period of time has elapsed since the content was changed, even if the priority change unit 102C changes the priority information of at least one passenger, Do not change content. Since the content is not changed for at least a certain period of time, the occupants do not feel uncomfortable due to frequent changes of the content.

The control unit 102D may change not only the content being reproduced but also the volume ratio between the speakers SP based on the priority information of each passenger on board the vehicle A. FIG.

For example, consider a case where a child is sitting in the back seat, and the priority information value becomes the highest because the child has changed from another sleep-related state to an awake state. In this case, the control unit 102D changes the content being reproduced to, for example, an anime song, and controls the volume control circuit 106 to adjust the volume of the anime song output from the rear seat speakers SP _RR and SP _RL to The volume of the animation song output from the speakers SP _FR and SP _FL on the driver's seat side and the passenger's seat side is increased. As a result, children sitting in the back seat will be able to hear anime songs better, and the driver sitting in the driver's seat will be able to hear the voice guidance of the navigation device more easily.

For example, consider a case where a child is sitting in the back seat, and the child's transition from wakefulness to sleep causes the driver's priority information to have the highest value. In this case, the control unit 102D changes the content being reproduced to, for example, Western music, and controls the volume control circuit 106 to adjust the volume of the Western music output from the speakers SP _FR and SP _FL on the driver's seat side and the passenger's seat side. is made larger than the volume of Western music output from the speakers SP _RR and SP _RL on the rear seat side. The volume of Western music output from the speakers SP _RR and SP _RL on the rear seat side may be set to zero. This allows children sitting in the back seat to sleep in a quiet environment, and drivers to listen to their favorite songs more often. In addition, the driver can notice that the child in the rear seat has fallen asleep due to the change in the content being reproduced and the change in the volume ratio between the speakers SP.

According to such a configuration, it is possible to automatically change the content and automatically change the volume ratio between the speakers SP according to the state of the passenger without imposing an operation burden on the passenger.

The foregoing is a description of exemplary embodiments of the present invention. Embodiments of the present invention are not limited to those described above, and various modifications are possible within the scope of the technical idea of the present invention. For example, the embodiment of the present application also includes the content of appropriately combining the examples and the like explicitly specified in the specification or the obvious examples and the like.

1 content reproduction system 10 content reproduction device 20 photographing device 30 source device 102 system controller 102A priority setting unit 102B occupant monitoring unit 102C priority change unit 102D control unit 104 signal processing unit 106 volume control unit 108 power amplifier 110 memory 110A priority Table 112 Operation unit 114 Display unit SP _FR , SP _FL , SP _RR , SP _RL Speaker

Claims (10)

In a content reproduction device provided in a vehicle and capable of reproducing content,
a setting unit that sets a value indicating a priority to each of a plurality of occupants who have boarded the vehicle;
a monitoring unit for monitoring a step-by-step state regarding sleep of each of the plurality of occupants , for which a value indicating the priority is set;
a changing unit that increases or decreases a value indicating the priority of at least one occupant on board the vehicle based on the gradual change in sleep-related state monitored by the monitoring unit;
a control unit for changing the content being reproduced based on the value indicating the priority of each of the plurality of passengers after the value indicating the priority of the at least one passenger is increased or decreased by the changing unit; ,
comprising
Content playback device. further comprising a storage unit that associates and stores a value indicating the priority for each occupant riding in the vehicle;
The setting unit
determining each of a plurality of occupants on board the vehicle;
reading a value indicating the priority of each of the plurality of occupants from the storage unit based on the result of the determination, and setting the read value indicating the priority to each of the plurality of occupants;
The content reproduction device according to claim 1. The setting unit
For occupants who cannot be identified, set a value indicating a prescribed priority that is lower than that for identifiable occupants,
3. The content reproduction device according to claim 2. The content playback device is
connected to a photographing device capable of photographing the interior of the vehicle;
The setting unit
determining each of the plurality of occupants based on captured image data output from the imaging device;
4. The content reproduction device according to claim 2 or 3. The content playback device is
connected to a sensor for detecting the sleep-related staged state of each of the plurality of occupants;
The monitoring unit
monitoring the gradual state of sleep of each of the plurality of occupants by monitoring the output of the sensor;
The content reproduction device according to any one of claims 1 to 4. The control unit
When the monitoring unit detects a sign that the driver of the vehicle is falling asleep, falling asleep, or sleeping, a predetermined warning sound is output regardless of the value indicating the priority of each of the plurality of occupants.
The content reproduction device according to any one of claims 1 to 5. The content playback device is
connected to a plurality of speakers set at different positions in the interior of the vehicle,
The content is
Content that includes at least audio,
The audio of said content is
output from each of the plurality of speakers,
The control unit
changing the content being reproduced based on the value indicating the priority of each of the plurality of passengers after the value indicating the priority of the at least one passenger is increased or decreased by the changing unit; change the volume ratio between multiple speakers,
The content reproduction device according to any one of claims 1 to 6. The control unit
changing the content being played back to the content according to the passenger with the highest value indicated by the value indicating the priority among the plurality of passengers riding in the vehicle;
The content reproduction device according to any one of claims 1 to 7. The control unit
until a certain period of time has elapsed after the content being reproduced is changed, the content is not changed even if the value indicating the priority of the at least one passenger is increased or decreased by the change unit;
The content reproduction device according to any one of claims 1 to 8. The monitoring unit
The sleep-related state of each of the plurality of occupants is classified into four stages: an awake state, a sleep onset sign state in which signs of sleep onset are observed, a sleep onset state, and a sleep state.
The content reproduction device according to any one of claims 1 to 9.

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