JP2018164144A - In-vehicle sound field control device - Google Patents

Abstract

[PROBLEMS] When there are a plurality of passengers in the same vehicle, not all of them may want to listen to the music being played back, such as those who are sleeping, those who operate personal mobile terminals, etc. There is a case where the user is not interested in listening to music, and it is a problem in the effective use of in-vehicle resources that the sound image of the speaker output is localized for such a person. An in-vehicle sound field control device according to the present invention detects an occupant presence or absence of a seat in a vehicle in the in-vehicle sound field control device that controls an audio device including a sound output unit that outputs music or sound in the vehicle. The occupant presence / absence detection unit and the sound output necessity determination unit that determines whether or not sound output is required at the seat position where the occupant of the music or sound output by the sound output unit is detected when the occupant presence / absence detection unit detects presence of an occupant in the seat And a sound field processing unit that localizes the sound image of the music or the sound output by the sound output unit with the seat position of the occupant determined to require sound output as a listening point based on the determination of the sound output necessity determination unit. [Selection] Figure 1

Description

The present invention provides an optimal acoustic environment according to the state of each occupant when performing music or audio reproduction by an audio device (acoustic device) in a vehicle.

Conventional audio devices include a device that provides an optimal acoustic environment according to the occupant's boarding position, and a device that changes the sound according to the traveling state and position. There is also an apparatus (Japanese Patent Laid-Open No. 2009-40368) that grasps the state of the occupant and provides sound corresponding to the occupant, but considers whether the occupant wants to provide music according to the behavior state of the occupant Not done. On the other hand, it is possible to remove a specific occupant from the range of music provision by human manual operation. However, since the operator of the audio device is often a driver, manual operation is possible. It is necessary to eliminate as much as possible.

JP2009-40368

When there are multiple passengers in the same vehicle, everyone may not want to listen to the music being played. Listen to the voice / music of the person who is asleep or who operates a personal mobile terminal. In particular, there is a case where the user is not interested, and it is a problem for effective use of in-vehicle resources to localize the sound image of the speaker output to such a person.

An in-vehicle sound field control device according to the present invention is an in-vehicle sound field control device that controls an audio device including a sound output unit that outputs music or sound in a vehicle. A sound output necessity determination unit that determines whether or not sound output is required at the seat position where the occupant of the music or voice output by the sound output unit is detected when the occupant presence detection unit detects presence of an occupant in the seat; and a sound output A sound field processing unit that localizes a music or sound image output by the sound output unit with the seat position of the occupant determined to require sound output based on the determination of the necessity determination unit as a listening point.

  According to the present invention, it is possible to determine whether or not each occupant in a vehicle is in a state of listening to music or sound, and to localize a sound image with respect to the occupant in a state of listening to music or sound. For a seat position of a person who is determined not to be desired, a sound field is formed so as not to localize the sound image, and an effective vehicle acoustic environment (sound field) is provided to a passenger boarding the vehicle.

Block diagram of in-vehicle sound field control device of the present invention The figure which shows the passenger | crew's state and effective sound field inside the vehicle mounted sound field control apparatus mounting | wearing of this invention The figure which shows the state of the passenger | crew inside the vehicle mounted sound field control apparatus mounting vehicle of this invention The figure which shows the state of the passenger | crew inside the vehicle mounted sound field control apparatus mounting vehicle of this invention The figure which shows the passenger | crew's state and effective sound field inside the vehicle mounted sound field control apparatus mounting | wearing of this invention The figure which shows the flowchart of the vehicle-mounted sound field control apparatus of this invention

Embodiment 1

FIG. 1 shows an on-vehicle sound field control device of the present invention. The on-board sound field control device of the present invention is configured to detect whether or not there is an occupant in a seat in the vehicle. When the occupant presence / absence detection unit 1 detects the presence of an occupant in the seat, the seat position of the occupant is detected. The sound output necessity determination unit 2 for determining whether or not the sound output of the music or the sound is necessary for the vehicle, and the sound output necessity determination unit 2 determines whether the sound output is necessary or not. The sound field processing unit 3 is used to localize the sound image.

As an audio device provided with the on-vehicle sound field control device of the present invention, in addition to the on-vehicle sound field control device, a sound output unit 4 for outputting music or sound into the vehicle, an input unit 5 for designating sound to be reproduced, music, etc. , A sound generation unit 6 that reproduces voice, music, and the like designated by the input unit 5, and a display unit 7 that displays the name of the music being reproduced.

As shown in FIGS. 2 to 5, the occupant presence / absence detection unit 1 detects the presence / absence of an occupant using an imaging device such as a camera installed inside the vehicle. The sound output necessity determination unit 2 uses an imaging device or the like to detect the state of the occupant riding in the vehicle, such as sleeping of the occupant, operation of the portable terminal / in-vehicle device, and reading. That is, for example, a detection process of a state where a passenger sitting on a seat is operating a portable terminal or a state such as dozing is performed, and it is determined whether or not sound output is required for a seat position where a passenger of music or voice is present.

As for dozing, dozing is determined based on the degree of eye opening of the passenger's eyes. More specifically, a threshold value for the degree of eye opening is set in advance, and whether the eye is sleeping is determined based on whether or not the degree of eye opening is below this threshold value.

Not all passengers seated in the seat want to listen to music, and those who are sleeping or who are operating mobile devices or in-vehicle devices do not want to listen to music or music. It is estimated that there is. The sound output necessity determination unit 2 determines that such passengers do not want to listen to music. The passengers are classified into those who want to listen to the music and those who do not want to listen to the music. The result of the classification is input to the sound field processing unit 3, and the seat is located where there is a passenger who is seated and who has determined that he wants to listen to the music. The sound field processing is performed so that the sound image is localized. A sound image of the music / sound to be reproduced is localized from the sound output unit 4 toward the seating position where the person who the sound field processing unit 3 determines to desire to listen to the music / sound is seated.

Here, the sound image is a sound that feels as if the performer is there by the sound wave emitted from the sound output unit 4. When the sound image is localized, it is necessary to adjust the sound output unit 4 to the correct posture. The sound field processing unit 3 recognizes the passenger in the seat and adjusts the sound output unit 4 to the posture according to the setting information. can do.

  For example, in FIG. 2, an effective sound field is formed toward three passengers, but in FIG. 5, the sound field is localized so that the sound image is localized at a seat position other than the seat position of the sleeper occupant. The sound output unit 3 is controlled by the processing unit 3 so as to form an effective sound field.

Here, FIG. 2 to FIG. 5 show occupant state transitions transiently, and by detecting the state of FIG. 4, the sound field processing unit 3 prevents the sound image from being localized to the dormant occupant. The sound output unit 4 is controlled to form a sound field as shown in FIG.

The occupant presence / absence detection unit 1 periodically checks the seating status of the seats in the vehicle (whether there is a occupant in each seat), and if the occupant is in the seat, the sound output necessity determination unit 2 The seating status of each occupant monitored by the occupant presence / absence detection unit 1 and the occupant status monitored by the sound output necessity determination unit 2 are always updated to the latest state.

In response to this state update, the sound field processing is periodically updated. In general, a driver often performs an operation on an audio device installed in a vehicle. In the present invention, the passenger presence / absence detection unit 1 and the sound output necessity determination unit 2 reflect the situation while sequentially monitoring the in-vehicle situation. By implementing the above, the driver can concentrate on the driving operation without performing the troublesome audio device operation during driving.

  Here, the occupant presence / absence detection unit 1 and the sound output necessity determination unit 2 are illustrated as separate blocks for convenience as functional blocks in FIG. 1, but may be configured as physically integrated units or separately. You may comprise by the unit of.

Next, the operation of each component will be described based on the flowchart shown in FIG.

The occupant presence / absence detection unit 1 detects the presence / absence of an occupant in each seat in the vehicle (S601), and the sound output necessity determination unit 2 detects the state of the occupant in the seat at the same cycle (S602). The state of the occupant refers to a state such as being asleep or operating a mobile terminal / in-vehicle device.

When the sound field processing unit 3 detects an occupant state change based on the occupant presence / absence detection unit 1 and the sound output necessity determination unit 2 (S603), the sound field processing unit 3 checks whether the change is an increase or decrease of the occupant (S604). When the number of occupants is increased or decreased, the position of the occupant (or the position where the occupant disappeared) is confirmed (S605), and the occupant is determined as a listener (or determined to be excluded from the listener) (S607). In accordance with the determination, the sound field processing unit 3 controls the sound output unit 4 to form a sound field in the vehicle. That is, the sound field processing unit 3 controls the sound output unit 4 so that the sound image is not localized at the seat position where the occupant disappears, and conversely the sound image is localized at the seat position where the occupant's seating is newly found. The sound output unit 4 is controlled so that

  The sound field processing unit 3 determines whether or not there is an increase or decrease in the number of passengers (S604), and if it is not an increase or decrease in the number of passengers, it checks whether or not there has been a change in the state of the passengers (S606). For example, when the state change corresponds to starting to fall asleep, starting to read a book, or starting to operate a mobile terminal / vehicle device, the sound field processing unit 3 is used for the passengers in these states. An occupant at a seat position other than the seating position to be seated is determined as a listener, and the sound field processing unit 3 controls the sound output unit 4 to output the sound output unit with the seat position of the occupant determined to require sound output as the listening point. The music image to be played or the sound image of the sound is localized (S607).

It should be noted that a state (behavior) such as sleep of the occupant for excluding the occupant from the listener is determined in advance. When an occupant falls into a state (behavior) such as dozing, the occupant is excluded from the listener.

On the other hand, a passenger who has awakened from dozing, has finished reading a book, and has finished operating a portable terminal / vehicle equipment is set as a listener.

According to the present invention, a sound field is formed so that a sound image is not localized for a seat position of a person who does not want to listen to sound according to the state of each occupant without performing troublesome operations. It is possible to acquire a vehicle acoustic environment that is effective for passengers on board, and this contributes to the effective use of limited in-vehicle resources such as speakers.

  In addition to the above, within the scope of the present invention, any component of the embodiment can be modified or any component of the embodiment can be omitted.

1 occupant presence / absence detection unit, 2 sound output necessity determination unit, 3 sound field processing unit, 4 sound output unit,
5 input unit, 6 sound generation unit, 7 display unit

Claims (4)

In an in-vehicle sound field control device that controls an audio device including a sound output unit that outputs music or sound in a vehicle,
An occupant presence / absence detecting unit for detecting the presence / absence of an occupant in a seat in the vehicle;
A sound output necessity determination unit that determines whether or not sound output is necessary at a seat position where the occupant is in the music or sound output by the sound output unit when the occupant presence detection unit detects presence of an occupant in the seat;
Based on the determination of the sound output necessity determination unit, a sound field processing unit that localizes the sound image of the music or sound output by the sound output unit with the seat position of the occupant determined to require sound output as a listening point;
A vehicle-mounted sound field control device comprising: The occupant presence / absence detection unit detects presence of an occupant and the sound output necessity determination unit detects that the occupant is sleeping, and determines that no sound output is required at a seat position where the occupant is present. The on-vehicle sound field control device according to 1. When the occupant presence / absence detection unit detects presence of an occupant and the sound output necessity determination unit detects a use state of the occupant's portable terminal or in-vehicle device, it is determined that no sound output is required at the seat position where the occupant is present. The on-vehicle sound field control device according to claim 1, wherein 2. When the presence / absence detection unit detects presence of an occupant and the sound output necessity determination unit detects a reading state of the occupant, it is determined that no sound output is required at a seat position where the occupant is present. The vehicle-mounted sound field control apparatus described in 1.

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