KR101736992B1 - Apparatus and method for improving the sound quality during driving. - Google Patents

Apparatus and method for improving the sound quality during driving. Download PDF

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Publication number
KR101736992B1
KR101736992B1 KR1020150155502A KR20150155502A KR101736992B1 KR 101736992 B1 KR101736992 B1 KR 101736992B1 KR 1020150155502 A KR1020150155502 A KR 1020150155502A KR 20150155502 A KR20150155502 A KR 20150155502A KR 101736992 B1 KR101736992 B1 KR 101736992B1
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KR
South Korea
Prior art keywords
information
sound quality
frequency band
noise
sound
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KR1020150155502A
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Korean (ko)
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KR20170053252A (en
Inventor
이승우
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현대자동차주식회사
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q5/00—Arrangement or adaptation of acoustic signal devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/037—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for occupant comfort, e.g. for automatic adjustment of appliances according to personal settings, e.g. seats, mirrors, steering wheel
    • B60R16/0373—Voice control

Abstract

The present invention relates to an apparatus and a method for improving sound quality during driving. A method for improving sound quality in an amplifier according to an embodiment of the present invention includes generating sound information from a microphone, volume state information from a head unit, Receiving information; Calculating a gain value of a noise frequency band based on the noise information, the volume state information, and the virtual engine sound information; Calculating a first band corresponding to the noise frequency band in which the gain value is equal to or greater than a preset reference value, amplifying and outputting a second band corresponding to the first band in a multimedia frequency band, and outputting the amplified second band; And a control unit.
Therefore, according to the method of improving the sound quality in the amplifier according to the present invention, it is possible to improve the quality deterioration of the multimedia sound in the car.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an apparatus and a method for improving sound quality during driving,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for improving the quality of a multimedia sound reproduced inside a vehicle while driving.

In recent years, entertainment functions have been emphasized in addition to functions as a means of transportation, which is an original function of a car. For example, a device for multimedia reproduction such as car audio, DMB broadcasting, or a DVD reproducing device is mounted in the car.

Devices for multimedia reproduction of such vehicles generally require manual operation of the driver, such as pressing a direct button of the driver, to adjust the volume.

2. Description of the Related Art [0002] In recent years, multimedia playback apparatuses for automobiles employing a method of automatically controlling the volume in accordance with a change in the speed of an automobile have become popular. For example, the system detects the speed of the vehicle and increases the volume when the car speed is high, and decreases the volume when the car speed is slow.

The multimedia device that automatically adjusts the volume according to the speed change of the automobile does not require the manual operation of the driver, thereby providing convenience during driving. In addition, since the driver can maintain the forward looking state, it is effective to prevent a traffic accident.

However, the device that adjusts the volume only considering the speed of the vehicle does not consider the current volume state of the multimedia sound, and does not consider the noise inside the vehicle. There is a problem that the quality of the multimedia sound can not be guaranteed only by the volume control without analyzing in the frequency domain for the noise.

Therefore, we propose a method to improve the multimedia sound quality by adjusting the volume of the vehicle based on the speed of the vehicle, considering the noise level in the vehicle and the volume level of the current multimedia sound in the frequency domain.

It is an object of the present invention to provide an apparatus and a method for improving the quality of a multimedia sound reproduced in a car while driving.

In detail, as an element to be considered for improving the quality of the multimedia sound, it is desirable to additionally consider not only the speed of the automobile but also the current volume of the automobile interior noise, automobile engine sound and multimedia sound.

It is yet another object of the present invention to provide an apparatus and method for improving the efficiency of quality improvement through analysis in the frequency domain for consideration factors for improving the quality of multimedia sound.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a method for improving sound quality in an amplifier, including: generating noise information from a microphone, generating a volume state from a head unit, Receiving virtual engine tone information from the information and the virtual engine tone generator; Calculating a gain value of a noise frequency band based on the noise information, the volume state information, and the virtual engine sound information; Calculating a first band corresponding to the noise frequency band in which the gain value is equal to or greater than a preset reference value, amplifying and outputting a second band corresponding to the first band in a multimedia frequency band, and outputting the amplified second band; . ≪ / RTI >

According to an embodiment, the receiving step, the calculating step, and the outputting step may be repeatedly performed in a predetermined period.

According to an embodiment, the virtual engine sound information may be calculated by using RPM (Revolution Per Minute) information and speed information collected from an EMS (Engine Management System).

According to an embodiment, when the hands-free function or the voice recognition function using the microphone is performed, the amplifier stops outputting; As shown in FIG.

According to an embodiment, the step of amplifying and outputting the multimedia frequency band corresponding to the noise frequency band in which the gain value is equal to or greater than a specific reference value may vary the amplification amount according to a preset level.

According to an embodiment, the predetermined level information may be received from the head unit.

In addition, a sound quality improvement amplifier according to an embodiment of the present invention may include noise information from a microphone, volume state information from a head unit, and virtual engine sound information from a virtual engine sound generator A communication unit for receiving; A gain value calculation unit for calculating a gain value of a noise frequency band based on the noise information, the volume state information, and the virtual engine sound information; A control unit for calculating a first band corresponding to the noise frequency band in which the gain value is equal to or greater than a preset reference value; And an output unit for amplifying and outputting a second band corresponding to the first band in a multimedia frequency band; . ≪ / RTI >

According to an embodiment, the virtual engine sound information may be calculated by using RPM (Revolution Per Minute) information and speed information collected from an EMS (Engine Management System).

According to an embodiment, the control unit may stop the output when a hands-free function or a voice recognition function using the microphone is performed.

According to the embodiment, the output unit may vary the amount of amplification according to a preset level.

According to an embodiment, the predetermined level information may be received from the head unit.

Effects of the apparatus and method for improving sound quality during running according to the present invention will be described as follows.

First, the present invention has an effect of preventing a traffic accident by allowing a driver to maintain a forward looking state by automatically adjusting the volume of a multimedia device while driving.

Second, by amplifying and outputting the frequency band in real time adaptively based on the noise information, the volume state information, and the virtual engine sound information, as well as adjusting the volume of the multimedia device, It has an effect of ensuring high quality of sound.

Third, the volume control and the compensation in the frequency domain are performed in real time, so that the high quality of the multimedia sound can be compensated adaptively to the driving environment.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
FIG. 1 is a flowchart illustrating a method for improving sound quality during a driving according to an exemplary embodiment of the present invention. Referring to FIG.
FIG. 2 is a graph of a noise frequency region for calculating a frequency region to be amplified in a method for improving sound quality during a running according to an embodiment of the present invention.
3 is a configuration diagram of a system for improving sound quality during a running according to an embodiment of the present invention.
FIG. 4 is a configuration diagram of an amplifier (Amplifier) for improving sound quality during traveling according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which embodiments of the present invention are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

The noise frequency causes frequency interference to the multimedia sound to be reproduced, thereby undermining the original multimedia sound. Damaged sound degrades the quality of the multimedia sound. That is, a problem of sound quality deterioration of multimedia sound due to noise occurs.

Therefore, in an embodiment of the present invention, the amplifier may amplify and output the multimedia frequency band to compensate for the frequency interference, thereby improving the quality of the sound quality.

Here, the amplifier analyzes the noise frequency band based on the noise information, the volume state information, and the virtual engine sound information during driving, and amplifies and outputs the frequency band adaptively according to the frequency characteristics of the noise frequency band.

FIG. 1 is a flowchart illustrating a method for improving sound quality during a driving according to an exemplary embodiment of the present invention. Referring to FIG.

In a method for improving sound quality during driving, an amplifier collects information to analyze the frequency band of the entire noise. Noise information from a microphone, volume status information from a head unit, and virtual engine tone information from a virtual engine tone generator (S110).

The amplifier calculates the overall gain of the noise frequency band based on the collected noise information, volume state information, and virtual engine sound information (S120).

The amplifier analyzes the entire gain of the frequency band of the noise and calculates a first band corresponding to the noise frequency band whose gain is equal to or greater than a predetermined reference value and amplifies the second band corresponding to the first band in the multimedia frequency band, And outputs it (S130).

Interference may occur with the frequency of the multimedia sound to be reproduced in the first band in which the gain value is higher than the specific reference value in the noise frequency band. Therefore, by amplifying and outputting the second band corresponding to the first band in the multimedia frequency band, it is possible to compensate for noise interference.

The specific reference value for the gain value can be set in advance and can be set differently depending on the situation.

FIG. 2 is a graph of a noise frequency region for calculating a frequency region to be amplified in a method for improving sound quality during a running according to an embodiment of the present invention.

The X axis corresponds to the frequency (Hz) and the Y axis corresponds to the gain value (decibel, dB). And a plurality of curves means a gain value according to the current volume state.

Referring to FIG. 2, it can be confirmed that a high gain value is obtained in a specific frequency band of noise. Therefore, it is necessary to amplify the frequency band of the multimedia sound for the frequency band having a high gain value to compensate for the noise.

The amplifier can amplify a specific frequency band of the multimedia sound by adjusting the Q value. The Q value generally refers to a measure of the quality of a circuit or system. In a resonance circuit, the Q value is defined as the resonance frequency divided by the bandwidth.

It is possible to control the frequency band to be amplified by adjusting the Q value with the frequency having the maximum gain value as the resonance frequency in the noise frequency region for calculating the frequency domain to be amplified. That is, if the Q value increases, the frequency range to be amplified becomes smaller, and the desired specific frequency band can be narrowly and accurately amplified. If the Q value is decreased, the frequency range to be amplified becomes larger and the wide frequency range can be amplified.

Therefore, the amplifier can set the compensation reference for the noise frequency band in which the gain value is equal to or higher than a preset reference value by adjusting the Q value.

3 is a configuration diagram of a system for improving sound quality during a running according to an embodiment of the present invention.

The Mic 100 transmits noise information of the interior of the vehicle to the AMP 200. Noise information is all sound collected through the Mic 100 from the engine sound generated from the vehicle to the sound transmitted from the outside of the vehicle to the inside, and is not limited to wind sounds, rain sounds, and the like.

The Mic 100 may be a conventional hand-free microphone and is economically advantageous in that it does not add any additional devices as input devices.

On the other hand, the original function of the Mic 100 is a voice call or voice recognition function using short-range communication such as Bluetooth. Therefore, when the Mic 100 is performing a voice call or voice recognition function, the AMP 200 stops interrupting the output of the multimedia frequency.

The AMP 200 has a function of adjusting the volume and tone, and amplifies / controls the multimedia sound source signal applied from the H / U 300 and outputs it to the speaker. The AMP 200 has an equalizer (EQ) function by adjusting the amount of amplification according to the frequency band. The AMP 200 can amplify the low frequency region or the high frequency region according to the driver's taste as well as the attenuated frequency region using the equalizer function.

In particular, with respect to the present invention, the frequency characteristics of the multimedia sound may not be uniform due to noise, and the AMP 200 may provide more compensation to the attenuated frequency region using the equalizer for the attenuated portion .

The H / U 300 collects status information of various units in the automobile necessary for driving the automobile, such as various electronic devices such as an engine unit, a driving unit, or an audio device in a car, And an electronic device checking and controlling device by receiving a control input from a driver and controlling the device.

In particular, according to one embodiment of the present invention, the H / U 300 transmits level information to the AMP 200 that varies the amount of amplification input from the driver. Conventionally, the function of automatically adjusting the volume (SDVC, Speed Dependent Volume Control) according to the speed change of the vehicle can be controlled by ON / OFF. In an embodiment of the present invention, the gain can be compensated according to customer preferences by allowing the driver to adjust or select a level that varies the amount of amplification.

For example, the SDVC can be divided into four stages of OFF / LOW / MID / HIGH depending on the amount of amplification of the multimedia sound. As the speed of the vehicle increases, the AMP 200 can amplify the frequency band of the multimedia sound by 3 dB when the driver selects the SDVC level to be LOW. When the MID is selected as the MID, the AMP 200 amplifies the frequency band of the multimedia sound The AMP 200 can amplify the frequency band of the multimedia sound by 9 dB when HIGH is selected.

EMS (Engine Management System) 400 can directly control various sensors and actuators, and by applying it to the engine, the user can control the engine by implementing desired engine condition.

In one embodiment of the present invention, the EMS 400 delivers the speed information of the car and RPM (Revolution Per Minute) information to the virtual engine sound generator.

The virtual engine sound generator generates a virtual engine sound using speed information and RPM (Revolution Per Minute) information transmitted from the EMS 400, and transmits the virtual engine sound information to the AMP 200.

The virtual engine sound generator outputs the virtual engine sound to the indoor audio.

Particularly, as one embodiment of the present invention, the virtual engine sound generator may be referred to as an ASD (Active Sound Design) module.

The CGW 500 is a device having a dedicated protocol for transmitting signals between different networks. In the embodiment of the present invention, the CGM 500 transmits a virtual engine sound signal received from the virtual engine sound generator to the AMP 200, .

Generally, the virtual engine sound generated from the virtual engine sound generator is transmitted to the H / U 300. However, in an embodiment of the present invention, the EMS 400 may transmit the virtual engine sound to the AMP 200 ), It is possible to prevent the delay caused in the computation and the signal transmission and to improve the sound quality in the running in real time.

FIG. 4 is a block diagram of an apparatus for improving sound quality during traveling according to an embodiment of the present invention. Referring to FIG.

FIG. 4 is a configuration diagram of an amplifier (Amplifier) for improving sound quality during traveling according to an embodiment of the present invention.

4, an amplifier 200 (Amplifier) for improving sound quality during driving includes a communication unit 210, a gain calculating unit 220, an output unit 230, a memory 240, and a controller 250. [ . ≪ / RTI >

The components shown in Fig. 4 are not essential, and an amplifier 200 for improving the sound quality during traveling with components having fewer or fewer components may be implemented.

Hereinafter, the components will be described in detail.

The communication unit 110 exchanges signals and data with respective modules constituting the system for improving sound quality during traveling.

In one embodiment of the present invention, the communication unit 110 receives indoor noise information of a vehicle from the Mic 100, receives a basic multimedia sound signal from the H / U 300, And receives status information. And receives a virtual engine sound from the EMS 400. [

The gain calculating unit 220 calculates the total frequency gain value of the indoor noise of the vehicle based on the noise information, the volume state information, and the virtual engine sound information received from the communication unit.

The output unit 230 outputs various information and / or signals supplemented through the controller 250 to improve sound quality during driving through the speaker.

The memory 240 stores a predetermined program code for controlling the overall operation of the amplifier 200 that performs sound quality improvement during traveling, and a space for storing input / output data when the operation by the program code is performed. And / or a storage area, and is provided in the form of an EEPROM (Electrically Erasable and Programmable Read Only Memory), an FM (Flash Memory), a hard disk drive, and the like.

The control unit 250 carries out data processing and calculation by transmitting and receiving data to and from each module in order to perform the sound quality improvement function while the amplifier 200 is running.

In an embodiment of the present invention, the control unit 250 calculates the frequency band having the highest gain value based on the total frequency gain value for the noise calculated by the gain calculating unit 220, , The frequency band of the multimedia sound to be amplified is calculated.

100: Mic (Mic)
200: Amplifier
300: H / U (head unit)
400: EMS (Engine Management System)
500: CGW (Central GateWay)
210:
220: gain value calculating section
230: Output section
240: Memory
250:

Claims (11)

In a method for improving sound quality in an amplifier,
Receiving noise information from a microphone, volume state information from a head unit, and virtual engine tone information from a virtual engine tone generator;
Calculating a gain value of a noise frequency band based on the noise information, the volume state information, and the virtual engine sound information; And
Calculating a first band corresponding to the noise frequency band in which the gain value is equal to or greater than a preset reference value,
Amplifying and outputting a second band corresponding to the first band in a multimedia frequency band;
/ RTI >
How to improve sound quality. The method according to claim 1,
The receiving step, the calculating step and the outputting step
Which is repeatedly performed in a predetermined cycle,
How to improve sound quality. The method according to claim 1,
The virtual engine tone information
Which is calculated by the RPM (Revolution Per Minute) information and the speed information collected from the EMS (Engine Management System)
How to improve sound quality. The method according to claim 1,
Stopping the output of the amplifier when a hands-free function or a voice recognition function using the microphone is performed;
≪ / RTI >
How to improve sound quality. The method according to claim 1,
Wherein the step of amplifying and outputting the multimedia frequency band corresponding to the noise frequency band,
The amplification amount is varied according to a preset level,
How to improve sound quality. 6. The method of claim 5,
Wherein the predetermined level information is received from the head unit,
How to improve sound quality. A communication unit for receiving noise information from a microphone, volume state information from a head unit, and virtual engine sound information from a virtual engine sound generator;
A gain value calculation unit for calculating a gain value of a noise frequency band based on the noise information, the volume state information, and the virtual engine sound information;
A control unit for calculating a first band corresponding to the noise frequency band in which the gain value is equal to or greater than a preset reference value; And
An output unit for amplifying and outputting a second band corresponding to the first band in a multimedia frequency band;
/ RTI >
Improving sound quality. 8. The method of claim 7,
The virtual engine tone information
Which is calculated by the RPM (Revolution Per Minute) information and the speed information collected from the EMS (Engine Management System)
Improving sound quality. 8. The method of claim 7,
Wherein,
When a hands-free function or a voice recognition function using the microphone is performed,
Improving sound quality. 8. The method of claim 7,
The output unit includes:
The amplification amount is varied according to a preset level,
Improving sound quality. 11. The method of claim 10,
Wherein the predetermined level information is received from the head unit,
Improving sound quality.
KR1020150155502A 2015-11-06 2015-11-06 Apparatus and method for improving the sound quality during driving. KR101736992B1 (en)

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KR1020150155502A KR101736992B1 (en) 2015-11-06 2015-11-06 Apparatus and method for improving the sound quality during driving.

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Publication number Priority date Publication date Assignee Title
CN111147976A (en) * 2018-11-05 2020-05-12 中兴通讯股份有限公司 Method and device for adjusting sound volume balance degree, terminal and storage medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012136160A (en) 2010-12-27 2012-07-19 Honda Motor Co Ltd Active type sound control system
JP2015506155A (en) 2011-12-16 2015-02-26 ボーズ・コーポレーションＢｏｓｅｃｏｒｐｏｒａｔｉｏｎ Virtual audio system tuning

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012136160A (en) 2010-12-27 2012-07-19 Honda Motor Co Ltd Active type sound control system
JP2015506155A (en) 2011-12-16 2015-02-26 ボーズ・コーポレーションＢｏｓｅｃｏｒｐｏｒａｔｉｏｎ Virtual audio system tuning

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