JPH0226840B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle-mounted audio equipment control device that controls the volumes of at least two speakers in the vehicle-mounted audio equipment.

Conventionally, the volume of at least two speakers in a vehicle-mounted audio device has been adjusted by manual operation.

Therefore, if no one is sitting in the passenger seat etc.
It is sufficient to fix the sound image from at least two speakers at the driver's seat position, but if someone is sitting in the passenger seat, etc., it is desirable to have the sound image at an intermediate position between the driver's seat and the passenger seat. There is a problem that adjustment operations are troublesome.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle-mounted audio equipment control device that can move a sound image without forcing a passenger to perform many adjustment operations.

In order to achieve the above object, the present invention includes a main body of an in-vehicle audio device, at least two speakers that generate sound in the vehicle interior based on electroacoustic signals from the main body of the in-vehicle audio device, and each of the at least two speakers. an adjustment means for adjusting the volume of the sound according to an external command; a storage means for storing an adjustment command for the adjustment means for moving the sound image to a predetermined setting position according to a seating position of an occupant in the vehicle; an input means for inputting a movement command for moving the sound image position in the vehicle interior to the set position; and an input means for inputting a movement command to move the sound image position in the vehicle interior to the set position; A technical means called an in-vehicle audio equipment control device is adopted, which is characterized by comprising a control means for moving a sound image.

In such a configuration of the present invention, the set position of the sound image is determined in advance according to the seating position of the passenger in the vehicle interior, and furthermore, the adjustment command for the adjustment means for moving the sound image to this set position is stored in the storage means. ing. When the sound image movement command is input to the input means, the control means outputs the adjustment command stored in the storage means to the adjustment means. As a result, the volume of each of the at least two speakers is adjusted, and the sound image is moved to the set position.

As described above, according to the present invention, the sound image can be moved without forcing the occupant to perform many adjustment operations, and the position to which the sound image is moved is predetermined according to the seating position in the vehicle interior. Therefore, it is possible to move the vehicle to an appropriate position for the occupant, which is an excellent effect.

The present invention will be described below with reference to embodiments shown in the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. In this Figure 1, 1 and 2 are the left front seat (passenger seat), the left front seat switch installed on the left rear seat,
The left rear seat switch constitutes riding detection means for detecting the riding state of the occupant. Reference numeral 3 indicates a car stereo main body as a main body of in-vehicle audio equipment, reference numerals 4 and 5 indicate amplifiers as adjustment means for adjusting the volume of speakers 6 and 7 (installed on the left and right sides of the rear part of the vehicle interior, respectively) according to external commands, and reference numerals 8 and 9 indicate an amplifier. High pass filter (HPF), 1
0 and 11 are rectifier circuits.

12 is a microphone for conversation detection installed near the steering wheel, 13 is an amplifier, 14 is an HPF for removing low frequency signals such as engine noise, and 15 is a rectifier circuit.

Reference numeral 16 denotes an A/D converter for converting analog signals into digital signals, which has a multiplexer function and sequentially converts the analog signals from the rectifier circuits 10, 11, and 15 into digital signals.

17 is a microcomputer that executes software digital arithmetic processing according to a predetermined control program, and includes a CPU, ROM, RAM, I/O
0 circuit section, clock generation section, etc., the control means is connected to the crystal oscillator 18, and is activated by receiving a stabilized voltage from an on-vehicle battery from a stabilized power supply circuit (not shown). inputs signals from the left front seat switch 1, left rear seat switch 2, and digital signals from the rectifier circuits 10, 11, and 15 via the A/D converter 16, executes arithmetic processing for acoustic control, It generates an adjustment command to the amplifiers 4 and 5 to adjust the volume of the speakers 6 and 7.

The operation of the above configuration will be explained with reference to the calculation flowchart in FIG. FIG. 2 is a calculation flowchart showing the calculation processing for acoustic control in the microcomputer 17.

Now, in a vehicle equipped with various components 1 to 18 shown in FIG. 1, when a key switch is turned on at the start of operation, each part of the electrical system is activated by receiving power from the vehicle battery. In the microcomputer 17, after performing initial settings (including resetting the conversation flag, setting the number of times data N to N=0, etc.), the microcomputer 17 performs a number of calculation processes for various controls including the acoustic control shown in FIG. It is executed repeatedly at a cycle of about 100 msec.

In the sound control calculation process shown in FIG. 2, the calculation process starts at step 101, and it is determined whether or not the conversation flag is set. At this time, if the conversation flag has been reset (it was reset at the time of initial setting), the determination becomes NO, and a boarding detection signal is generated from left front seat switch 1 or left rear seat switch 2 at steps 102 and 103. Determine whether or not. If no entry detection signal is generated from any switch, the process proceeds to step 104, where the adjustment flag is reset, and the process proceeds to step 105, where an adjustment command (previously set ) is generated in amplifiers 4 and 5.

On the other hand, when a boarding detection signal is generated from either the left front seat switch 1 or the right rear seat switch 2,
Proceed to step 112 to set the adjustment flag,
Proceeding to step 113, an adjustment command is issued to the amplifiers 4 and 5 to equalize the volumes of the speakers 6 and 7.

Therefore, by the above-described operation, the sound images from the speakers 6 and 7 can be automatically adjusted depending on the riding condition of the left front seat or the left rear seat.

Next, the process proceeds to step 106, where the rectifier circuit 1
0 and 11 through the A/D converter 16, _and proceed to step ₁₀₇ , the microphone 1 is inputted from the speakers 6 and 7.
The wait state is maintained for the sound wave propagation time (calculated and set in advance) to step 2, and then step 1
Proceed to step 08, from the rectifier circuit 15 to the A/D converter 16
Input a digital signal (denoted as M) via
Proceed to step 109 and set the conversation level L to L=M-
Calculated using the formula K×(S ₁ +S ₂ ). (However, K
(is a constant) In other words, by removing the acoustic components generated from the speakers 6 and 7 from the audio information input to the microphone 12, the audio level L of only the conversation is determined.
Calculate.

Then, proceed to step 110 and set the conversation level L.
is greater than or equal to a predetermined value α. If no conversation is being conducted and the conversation level L is lower than the predetermined value α, the determination becomes NO, and the process proceeds to step 111 where the number of times data N is set to 0. Reset.

On the other hand, if the conversation is in progress and the judgment in step 110 is
If YES, the process proceeds to step 114, where the number data N is updated by adding 1, and the process proceeds to step 115, where it is determined whether or not the number data N has reached 110. Then, the determination becomes NO until N reaches 10, but when N reaches 10 (that is, the conversation level L is equal to or higher than the predetermined value α 10 times in a row), the determination becomes YES, and step 116 The program proceeds to step 117 to reset the count value for the timer count to 0, proceeds to step 117 to reset the number of times data N to 0, and proceeds to step 118 to set the conversation flag. Then, the process proceeds to step 119 to determine whether or not the adjustment flag is set. If the adjustment flag is set in step 112, the determination becomes YES, and the process proceeds to step 12.
The amplifiers 4 and 5 issue an adjustment command to advance to 0 and set the volume of the speakers 6 and 7 to a predetermined low level, respectively.
occurs in

On the other hand, if the adjustment flag is not set and the determination in step 119 is NO, step 124 is performed.
Then, an adjustment command is issued to the amplifiers 4, 5 to bring the sound images from the speakers 6, 7 to the driver's seat position and to reduce the volume to a low level.

Therefore, by the above-described operation, when a conversation is in progress, the volume of the speakers 6 and 7 is reduced, and the sound image position is automatically adjusted depending on the riding condition in the left front seat or the left rear seat.

If a conversation is in progress and the conversation flag is set, the determination at step 101 becomes YES, and the process proceeds to step 121, where the internal timer is counted, and the process proceeds to step 122.
5 according to the count value counted by the timer.
Determine whether seconds have elapsed. If 5 seconds have not elapsed, the determination becomes NO and the calculations from step 106 onward are performed (if it is determined that a conversation is in progress, the timer count value is reset to 0 in step 116). When 5 seconds have elapsed without conversation, the determination becomes YES, and the process proceeds to step 123, where the conversation flag is reset.
Proceed to step 102.

Therefore, the volume of the speakers 6 and 7 is kept at a low level until the state of no conversation continues for 5 seconds, and after 5 seconds, the volume returns to the previous volume.

In addition, in the above embodiment, the sound images from the speakers 6 and 7 are adjusted in two stages.
In a device equipped with four speakers, the adjustment may be divided into three or four stages depending on the number of occupants.

Further, although a car stereo is shown as the in-vehicle audio device, a car radio may also be used.

Further, although the case where the volume is suddenly restored to the previous volume after 5 seconds has elapsed since there is no conversation has been shown, the volume may be gradually increased to restore the volume to the previous volume.

Furthermore, the sound control is performed using a microcomputer 17.
We have shown what is done with the software by
It may also be implemented using a hard logic configuration using an electronic circuit.

Furthermore, although the vehicle shown does not detect whether the vehicle is in the driver's seat, a seat switch may also be provided at the driver's seat in order to reliably detect whether the vehicle is in the driver's seat.

As described above, in this embodiment, attention is paid to the fact that the seating positions of the occupants in the vehicle interior are almost fixed, and the positions of the sound images are set in advance according to the riding conditions of the occupants at these seating positions. Therefore, sound can be provided to the occupants inside the vehicle with an appropriate sound image position.

Further, since the sound image position is switched according to the passenger's riding condition, the passenger can obtain sound at an appropriate sound image position without performing many troublesome operations.

Furthermore, in this embodiment, the seat switch automatically detects the passenger's riding condition, and the sound image position is automatically switched according to the passenger's riding condition detected by the seat switch.
The occupant can obtain sound at an appropriate sound image position according to the riding condition without performing any adjustment operation.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention;
FIG. 2 is an arithmetic flowchart showing the arithmetic processing of the microcomputer in FIG. 1, and FIG. 3 is a block diagram showing the structure of the present invention. DESCRIPTION OF SYMBOLS 1, 2...Left front seat switch and left rear seat switch as boarding detection means, 3...Car stereo body as in-vehicle audio equipment body, 4, 5...Amplifier as adjustment means, 6, 7...Speaker, 17...Controlling means as a microcomputer.

Claims (1)

[Scope of Claims] 1 A vehicle-mounted audio equipment main body; at least two speakers that generate sound in the vehicle interior based on electroacoustic signals from the vehicle-mounted audio equipment main body; an adjustment means for adjusting according to a command; a storage means for storing an adjustment command for the adjustment means for moving the sound image to a predetermined setting position according to a seating position of an occupant in the vehicle interior; and a sound image in the vehicle interior. input means for inputting a movement command to move the position to the set position; and outputting an adjustment command stored in the storage means to the adjustment means in response to the movement command of the input means, and moving the sound image to the set position. An in-vehicle audio equipment control device characterized by comprising: a control means for controlling. 2. The storage means is configured to store adjustment commands for the adjustment means for moving the sound image to a plurality of predetermined setting positions according to the riding condition of the occupant in the vehicle interior. An in-vehicle audio equipment control device according to claim 1. 3. The vehicle-mounted audio equipment control device according to claim 2, wherein the input means is configured to input the movement command according to the riding state of the occupant in the vehicle interior.