JPH03258200A - Acoustic reproducing device - Google Patents

Abstract

PURPOSE:To locate a sound image to an optimum position automatically by detecting a listening point of a listener based on an output from a seat position detection means of a power seat and applying arithmetic processing to an acoustic signal so that the sound image is located to the listening point. CONSTITUTION:A control section 15 outputs seat position detection information to a control section 7 from a storage area storing a current seat position and attitude. The control section 7 based on the received seat position detection information calculates a listening point of a listener and sets an arithmetic constant and an arithmetic coefficient in a digital signal processor 1 so that the sound image is located to the listening point. Thus, an acoustic reproducing device 2 detects the position of a seat 13 and the attitude from a control section 15 of a power seat, varies the arithmetic constant and coefficient in the processor 1 in response to the result of detection and locates the sound image automatically to the listening point of the listener. Thus, it is not required for the listener to make complicated operation to adjust the location of the sound image and the operability and the function performance are improved.

Description

[Detailed Description of the Invention] Overview For example, in an in-vehicle sound reproduction device that can reproduce realistic sound using a so-called digital signal processor, etc., the present invention is based on the output from the seat position detection means of the power seat. to detect the listening point of the listener,
The acoustic signal is processed so that the sound image is localized at the listening point.

Thereby, the sound image can be automatically localized to the optimal position without complicated operations.

INDUSTRIAL APPLICATION FIELD The present invention relates to a vehicle-mounted sound reproducing device equipped with a signal processing means such as a digital signal processor.

BACKGROUND OF THE INVENTION In a vehicle-mounted sound reproducing device, a typical conventional technique requires a listener to adjust the volume in order to adjust the left-right and/or front-back balance of a sound image.

Problems to be Solved by the Invention Therefore, in the above-mentioned prior art, when the device whose volume is to be controlled is far from the listening position, it is impossible to adjust the volume while listening to the reproduced sound. After listening to the reproduced sound at the listening position, it was necessary to change the posture to the location where the device is located, operate the volume, and then return to the listening position and check the reproduced sound. Therefore, in order to localize the sound image at a desired position, a complicated operation and a long time are required, resulting in poor operability and functionality.

Furthermore, in the case of a vehicle-mounted sound reproduction device, the sound listening conditions of the driver, passengers, etc. change frequently, so the volume adjustment described above must be performed every time the conditions change.

On the other hand, with recent advances in digital signal processing technology, configurations have been proposed in which acoustic signals are digitally processed to reproduce realistic sound images. In such a configuration, a slight shift in the listening point of the listener will greatly affect the reproduction of the sound image.

An object of the present invention is to provide a sound reproduction device that can localize a sound image to a listener's listening point without complicated operations.

, Means for Solving the Problems The present invention provides a signal processing means between an acoustic signal source and a speaker, and uses the signal processing means to perform arithmetic processing on the acoustic signal from the acoustic signal source to adjust the localization position of the sound image. In the sound reproducing apparatus capable of performing a sound reproducing apparatus, a control means controls the arithmetic processing of the signal processing means so that a sound image is localized at a listening point of a listener in response to an output from a seat position detection means of a power seat of an automobile. It is a sound reproduction device characterized by including.

According to the present invention, the acoustic signal from the acoustic signal source is processed by the signal processing means to adjust the localization position of the sound image, and then,
It is output to a speaker and converted into sound.

On the other hand, the seat position detection means of the power seat of the automobile outputs information regarding the seat position where the listener is seated.
The control means receives the seat position information and controls the arithmetic processing of the signal processing means so that the sound image is localized at the listening point of the listener.

Therefore, even if the listening point of the listener is displaced, the sound image is automatically localized to the displaced listening point.

Embodiment FIG. 1 is a block diagram showing the electrical configuration of a vehicle-mounted sound reproduction device 2 according to an embodiment of the present invention. An acoustic signal source 3 realized by a magnetic tape playback device, a radio receiver, or the like outputs acoustic signals of both left and right channels. This acoustic signal is separated into front left and right and rear left and right acoustic signals by the channel separation unit 4, and then converted into analog and digital signals by analog and digital converters ADFL, ADFR: ADRL, ADRR, and signal processing means. The signal is input to a digital signal processor 1.

In connection with this digital signal processor 1, a control section 7 and a memory 8 are provided. As will be described later, the digital signal processor 1 processes each of the acoustic signals so that a sound image is localized at a position corresponding to the position and posture of the seat 13, and converts the digital/analog converters DAFL, DAFR, DARL, Output to DARR.

The front left channel audio signal from the digital/analog converter DAFL is applied to the speaker 5PFL via the power amplifier AFL and converted into sound. Similarly, the front right channel acoustic signal from the digital-to-analog converter DAFR is routed through the power amplifier APR to the speaker 5PFR.
It is given to a sound and is made into a sound.

The rear left channel audio signal from the digital/analog converter DARL is applied to the speaker 5PRL via the power amplifier ARL and converted into sound. Similarly, the rear right channel audio signal from the digital/analog converter DAPjR is sent to the speaker 5 via power amplifiers A and RR.
The signal is applied to the PRH and converted into sound.

In the vehicle interior 10 of the car, there is a speaker 5P on the front left side.
FL is arranged, a speaker 5PPR is arranged on the front right side, a speaker 5PRL is arranged on the rear left side, and a speaker 5PRR is arranged on the rear right side.

On the other hand, a seat 13 configured as a so-called power seat is attached to the driver's seat 12. This seat 13 is the second
In response to an input operation from the input operation section 14 shown in the figure, the control section 15 drives and controls the drive section 16 to change the position and posture of the seat 13.

The drive section 16 is, for example, a switch 14 of the input operation section 14.
When a is operated, the front and rear positions of the seat 13 and the height of the seat surface are displaced and driven. Also, switch 14. When b is operated, the inclination angle, that is, the reclining angle, of the backrest 13a is driven to be displaced.

The control unit 15, which is a seat position detection means, has a sensor that detects the position and posture of the seat 13, and a memory that stores the seat position and posture. A storage area for storing information and a storage area for storing separately set seat positions and postures are provided.

Therefore, by operating the input operation unit 14, the seated person can move the seat to adjust the seat position and posture to make it easier to drive, and can find a seat that suits them based on seat information stored in memory in advance. There is a method of selecting a position and posture and automatically adjusting the seat position and posture.

The memory can store a plurality of seat positions and postures set by passengers, and can store seat positions and postures for each driver, and can store seat positions and postures for each driver, and can also It is used for memorization. Then, the control section 15 outputs seat position detection information to the control section 7 via the line 11 from the storage area that stores the current seat position and posture.

The control unit 7 calculates the listening point of the listener based on the input seat position detection information, and sets calculation constants and calculation coefficients in the digital signal processor so that the sound image is localized at the listening point. Note that the calculation constants and calculation coefficients are
Corresponding to the position and posture of the seat 13, this is determined in advance through experiments and the like.

That is, for example, seat 13 is an instrument! 11 side, ie, to the front side, the front side acoustic signal data is temporarily delayed in the memory 8 and then output.

As described above, in the sound reproduction device 2 according to the present invention, the position and posture of the seat 13 are detected from the power seat control unit 15, and the calculation constants and coefficients in the digital signal processor 1 are changed according to the detection results. The sound image is automatically localized to the listener's listening point.
The listener no longer needs to perform complicated operations to adjust the localization position of the sound image, and operability and functionality can be significantly improved.

Further, a detection means for detecting the presence or absence of a passenger may be provided in the passenger seat 17 or the rear seat 18, and the localization position of the sound image may be adjusted in accordance with the detection result.

Furthermore, in correspondence with the memory that stores the seat position in advance in the control unit 15 of the power seat, a seat information correction memory that can correct the seat information by external operation is provided, and the seated person selects the seat position information stored in advance. In this case, the control unit 15 of the power seat may output information from the corresponding seat information correction memory to perform control according to not only the seat position but also the physique of the seated person.

Effects of the Invention As described above, according to the present invention, the position and posture of the seat where the listener is seated are detected from the seat position detection means of the power seat, and the arithmetic processing of the acoustic signal is performed based on the detection result. Therefore, even if the listening point of the listener shifts,
The sound image can be automatically localized to the displaced listening point without complicated operations, and operability and functionality can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the electrical configuration of a sound reproduction device 2 according to an embodiment of the present invention, and FIG. 2 is a perspective view of a seat 13. ■...Digital signal processor, 211 reproduction device, 3...Acoustic signal source, 14...Input operation unit, 7゜1
5... Control unit, 10... Vehicle interior, 13, 17.18.
Seat, 16... Drive unit, 5PFL, 5PPR/5P
RL, 5PRR...Speaker

Claims (1)

[Scope of Claims] Sound reproduction in which a signal processing means is provided between an acoustic signal source and a speaker, and the acoustic signal from the acoustic signal source is processed by the signal processing means to adjust the localization position of the sound image. The apparatus is characterized by comprising a control means for controlling arithmetic processing of the signal processing means so that a sound image is localized at a listening point of a listener in response to an output from a seat position detection means of a power seat of an automobile. sound reproduction device.