JPS5853300A - Controller for mobile audio device - Google Patents

Abstract

PURPOSE:To change automatically a sound image with a control of the sound volume to maintain an optimum state for a controller for a mobile audio device, by controlling the sound volume of 2 speakers provided in a car in accordance with the seating state at the seat, the level of the external weight and the time of continuation respectively. CONSTITUTION:The presence or absence of a fellow rider at the left seat is supplied to a CPU17 by means of seat switch 1 and 2 provided at the front and rear parts of the left side. The output of a car stereo set 3 is amplified 4 and 5 to drive speakers 6 and 7 and at the same time rectified 10 and 11 through HPF8 and 9 to be fed to the CPU17 after an A/D conversion. The voice of the conversation is fed through a mike 12 provided near a handle and amplified 13 and rectified 15 with the engine noise eliminated through HPF14 to be fed to the CPU17 after an A/D conversion. The CPU17 controls the sound volume of the right and left speakers by the presence or absence of a fellow rider to shift the sound image. Then the amplification factor is controlled for amplifiers 4 and 5 respectively in response to the sound volume of the conversation, and the level of the speaker sound volume is controlled so as not to disturb the conversation. In such way, the optimum state is maintained for a car stereo set.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an in-vehicle audio equipment control device for controlling a sound mouse of a subika.

Conventionally, the volumes of at least two speakers in a vehicle-mounted audio device are 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 there is someone in the passenger seat etc. It is desirable that the seat be placed in an intermediate position between the driver's seat and the passenger's seat, but there is a problem in that the adjustment operation for this is cumbersome.

The present invention has been made in view of the problem described in item 2, and includes an adjustment means for adjusting the front position of each of the at least two speakers according to an external command, for a car-mounted device equipped with at least two speakers; Seat position 1 in the vehicle that is the target for sound image movement? an occupancy detection means for detecting a state of an east car on the east side of the vehicle, and an adjustment command for causing a sound image from the at least two speakers to be placed at the driver's seat position when a signal indicating an unoccupied state is generated from the occupancy detection means at the seat position. When a signal is generated in the adjustment means and indicates a riding state at the seat position from the riding detecting means, the sound image from the at least two speakers is moved from the driver's seat position to a predetermined position with respect to the seat position at which the passenger has boarded the vehicle. and a control unit that generates an adjustment command for movement to the adjustment unit, so that the sound image from the at least two speakers can be automatically adjusted according to the riding condition of the occupant. The purpose is to provide

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 FIG. 1, reference numerals 1 and 2 are a left front seat (passenger seat), a left front seat switch, and a left rear seat switch provided on the left rear seat, and constitute riding detection means for detecting the riding state of an occupant. 8
is a car stereo main body as an in-vehicle audio equipment main body, 4,5
8 and 9 are bypass filters (II P F ); 8 and 9 are bypass filters (II P F );
10°11 is a rectifier circuit.

12 is a microphone for conversation detection installed near the steering wheel; 18 is an amplifier; 14 is an HT'l' for filtering out large low-frequency signals such as engine noise; and 15 is a rectifier circuit.

16 is an A/D that converts analog signals into digital signals.
The converter 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, ILOM, and RAM.

The control means includes an I10 circuit section, a clock generation section, etc., and is connected to the crystal oscillator 18 and is activated by receiving a stabilized voltage from a stabilized power supply circuit (not shown) from the vehicle battery. , left front seat switch L,
Signal from left rear seat switch 2, rectifier circuit 10, 11.1
5 inputs digital signals via A/D converters 16f and 16H, performs arithmetic processing for sound control, and generates an adjustment command to amplifiers 4 and 5 to adjust the volume of speakers 6.7. .

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 1-18 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 on-vehicle battery. Then, in the microcomputer 17, initial settings (reset of conversation flag, number of times data N
(including N-0...), the arithmetic processing for various controls including the acoustic control shown in FIG. 2 is repeatedly executed at a cycle of about several hundred m5ec.

In the acoustic 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, the conversation flag is reset (initial setting is 1
-) and the judgment becomes No, and step 10
At step 2, 103, it is determined whether or not a boarding detection signal is generated from the left front seat switch 1 or the left rear seat switch 2.

When no riding detection signal is generated from any switch, the process proceeds to step 104 to reset the adjustment flag, and the process proceeds to step 105 to reset the speaker 6.7.
Adjustment command to bring the sound image to the driver's seat position (preset)
is generated in amplifiers 4 and 5.

On the other hand, when the riding inspection signal 1F1 is generated from either the left front seat switch 1 or the right rear seat switch 2, step 1 is performed.
The process proceeds to step 12, where all adjustment flags are set, and the process proceeds to step 113, where an adjustment command is issued to the amplifiers 4 and 5 to equalize the volumes of the speakers 6 and 7.

Is it a penalty? - Previous one - Left - Front seat alone Agb - Right - Rear seat A - Niemachi Kei's Rukii Re - Kameshira' car - Inspection -
Therefore, by the operation explained above, the sound image from the speaker 6.7 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 digital signals (S, , S, respectively) are input from the rectifier circuits 10 and 11 via the A/D converter 16, and the process proceeds to step 107, where the microphones are output from the speakers 6.7. The wait state is maintained for the acoustic wave propagation time (calculated and set in advance) to 12, and then the process proceeds to step 108, where the digital signal (Δ (assumed) and proceed to step 109 to set the conversation level L to L=M−K.
Calculated using the formula of X(8++82). (However, K
(is a constant) That is, from the audio information input to the microphone 12, the component due to the sound generated from the speaker 6.7 is removed, and the audio level L of only the conversation is calculated.

Then, the process proceeds to step 110, where it is determined whether or not the conversation level L is greater than or equal to the predetermined value α. If no conversation is being held and the conversation level L is lower than the predetermined value α, the determination becomes No, and step 111 Proceed to and reset the number data N to 0.

On the other hand, if the conversation is in progress and the determination at step 110 is YES, the process advances to step 114 to update the number of times data N by adding 1, and then to step 115 where it is determined whether or not the number of times data N has reached 10. judge. Then, the determination becomes NO until N does not reach lO, 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 data of the timer count to 0, proceeds to step 117 to reset the number of times data N to O, and proceeds to step 118 to set the conversation flag. Then, the process proceeds to step 119, where it is determined 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 120, where the volume of the speaker 6.7 is set. Amplifier 4 sends an adjustment command to make each of them a predetermined small level.
Occurs at 5 degrees.

On the other hand, the adjustment flag is not set and Stella 7"l1
If the determination in step 9 is NO, the process proceeds to step 124, where an adjustment command is issued to the amplifiers 4 and 5 to bring the sound image 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, 7 is reduced, and the sound image position is automatically adjusted depending on whether the driver is in the left front seat or the left rear seat.

When a conversation is in progress and the conversation flag is set, the determination at step 101 becomes YES, the process proceeds to step 121 to count the internal timer, and the process proceeds to step 122 to count the timer count. Based on the value, it is determined whether 5 seconds have elapsed. If 5 seconds have not elapsed, the determination is NO and the calculations from step 106 onward are performed (if it is determined that the conversation is in progress, the timer count value is reset to O in step 116). When 5 seconds have elapsed without conversation, the determination becomes Y'ES, and step 123
The conversation flag is reset by proceeding to step 102.

Therefore, until there is no conversation for 5 seconds, the speaker 6.
The volume of step 7 is set to a low level, and after 5 seconds, the volume returns to the previous volume.

In addition, in the above embodiment, the sound image from the speaker 6.7 is
Although the adjustment is performed in stages, in a system equipped with four speakers, the adjustment may be made in eight stages 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.

Furthermore, although the example in which the volume is suddenly returned to the previous volume after 5 seconds have elapsed since the end of conversation has been shown, the volume may be gradually increased to restore the previous volume.

Furthermore, although the sound control is performed by software using the microcomputer 17, it may be performed by a hard logic configuration using an electronic circuit.

Furthermore, although the example shown does not detect the state of riding in the driver's seat, a seat switch may also be provided on the driver's seat in order to reliably detect that the driver is riding in the driver's seat.

As described above, in the present invention, it is possible to automatically adjust the sound images from at least two speakers according to the riding condition of the occupant, and there is no need to perform the troublesome operation of making adjustments depending on the riding condition of the occupant. Moreover, since the adjustment is automatically performed, it has the excellent effect of being able to be performed accurately.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of the present invention, and FIG. 2 is an operation flowchart showing the operation processing of the microcomputer in FIG. 1.2...Left front seat switch as a vehicle detection means. (11) Left rear seat switch, 3...Car stereo main body as in-vehicle audio equipment, 4,5...-amplifier as adjustment means, 6,7...Speaker, I7...as control means microcomputer. Representative Patent Attorney Takashi Okabe (12)

Claims (1)

[Scope of Claims] 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 that adjusts according to a command; an occupancy detection means that detects a state of occupancy at a seat position in the vehicle interior that is a target for stopping sound image movement; and a signal from the occupancy detection means indicating a non-occupancy state of the seat position. When this occurs, an adjustment command is issued to the adjusting means to cause the sound images from the at least two speakers to be located at the driver's seat position, and when a signal indicating the riding state at the seat position is generated from the riding detecting means, the at least two speakers An in-vehicle audio equipment control device comprising: control means for generating an adjustment command to the adjustment means for moving a sound image from a speaker from a driver's seat position to a predetermined position with respect to a passenger's seat position.