KR20130017513A - Car audio system and control method thereof - Google Patents

Car audio system and control method thereof Download PDF

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Publication number
KR20130017513A
KR20130017513A KR1020110079987A KR20110079987A KR20130017513A KR 20130017513 A KR20130017513 A KR 20130017513A KR 1020110079987 A KR1020110079987 A KR 1020110079987A KR 20110079987 A KR20110079987 A KR 20110079987A KR 20130017513 A KR20130017513 A KR 20130017513A
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South Korea
Prior art keywords
engine
audio signal
state information
signal
information
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KR1020110079987A
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Korean (ko)
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문용민
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현대모비스 주식회사
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Priority to KR1020110079987A priority Critical patent/KR20130017513A/en
Publication of KR20130017513A publication Critical patent/KR20130017513A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0211—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for record carriers apparatus, e.g. video recorders, tape players or CD players
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
    • G11B20/10027—Improvement or modification of read or write signals analog processing for digital recording or reproduction adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2400/00—Indexing codes relating to detected, measured or calculated conditions or factors
    • B60G2400/30—Propulsion unit conditions
    • B60G2400/38—Speed of engine rotation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2800/00—Indexing codes relating to the type of movement or to the condition of the vehicle and to the end result to be achieved by the control action
    • B60G2800/90—System Controller type
    • B60G2800/97—Engine Management System [EMS]
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
    • G11B2020/10944—Real-time recording or reproducing, e.g. for ensuring seamless playback of AV data

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

PURPOSE: A car audio system and a control method thereof are provided to improve the convenience of a user by using voice information. CONSTITUTION: An engine control unit(100) detects the information of an engine. A signal processing control part(110) outputs a control signal for controlling the output level of an audio signal according to the information of the engine. A signal processing unit(120) produces the audio signal according to the control signal. [Reference numerals] (100) Engine control unit; (110) Signal processing control part; (120) Signal processing unit; (AA) Audio signal input

Description

Car audio system and its control method {CAR AUDIO SYSTEM AND CONTROL METHOD THEREOF}

The present invention relates to a car audio system and a control method thereof. More particularly, the present invention relates to a car audio system and a control method thereof, which can provide an optimal sound service by controlling an audio signal of a vehicle in consideration of a state of a vehicle.

In general, a car audio system mounted on a vehicle satisfies various needs of a driver by providing information such as road traffic information, weather information, various news, and audio or video information while driving.

Such a car audio system includes a player for reproducing audio signals recorded on various recording media such as an antenna for receiving radio waves, a tuner for tuning a tuned channel, a tape, a CD and a DAT, a preamplifier and a main amplifier for amplifying the output audio signal. And a variety of amplifiers such as equalizers, and speakers for outputting amplified sound sources as sound.

The audio signal output by the car audio system cannot be stably transmitted to the driver due to the noise caused by the surrounding environment of the vehicle, and thus, a study of a method of compensating the sound quality of the audio signal has emerged.

For example, a change in the sound quality characteristics of the audio signal according to the structure of the vehicle and the surrounding environment can be compensated by using the equalizer, which is a built-in amplifier, and the output volume of the audio signal that is changed due to the inflow of noise due to the traveling speed is controlled by adjusting the volume. To compensate.

However, the audio signal output to the interior of the vehicle is also distorted by various factors, resulting in a deterioration in sound quality. In particular, the overall sound quality is not balanced and the audio information of the audio signal cannot be accurately transmitted to the driver. This entails the hassle of increasing the volume of the audio in order for the driver to directly compensate for the degradation of sound quality.

According to an embodiment of the present invention, there is provided a car audio system and a control method thereof that can deliver voice information to a user more stably.

In addition, according to an embodiment of the present invention, there is provided a car audio system and a control method thereof that optimize the sound quality characteristics of an audio signal to improve user convenience.

Car audio system of the present invention includes an engine control unit for detecting engine state information of the vehicle; A signal processing controller for outputting a control signal for adjusting an output level of a predetermined frequency region of the audio signal according to the engine state information detected by the engine controller; And a signal processor configured to generate the audio signal according to the control signal.

The signal processor may amplify the output of the frequency domain of the audio signal corresponding to the noise frequency domain of the engine calculated according to the engine state information.

The audio signal may be an audio signal of a music mode.

The engine state information may include engine revolutions per minute (RPM) information, engine state information and engine torque information according to the degree of depressing of the pedal.

The engine controller may detect the engine state information in real time and transmit the detected engine state information to the signal processing controller.

The control method of the car audio system of the present invention includes detecting engine state information of the vehicle in a state where the vehicle is started; Calculating a noise frequency region of the engine according to the detected engine state information; And adjusting the output level of the frequency domain of the audio signal of the vehicle according to the noise frequency domain of the engine.

And amplifying the output of the frequency domain of the audio signal corresponding to the noise frequency domain of the engine.

The audio signal may be an audio signal of a music mode.

The engine state information may include engine revolutions per minute (RPM) information, engine state information and engine torque information according to the degree of depressing of the pedal.

The noise frequency region of the engine according to the engine state information is mapped and stored in advance.

The car audio system and its control method according to the present invention can deliver the audio signal to the user more accurately and stably.

In addition, the car audio system and its control method according to the present invention has the effect of improving the convenience of the driver by providing optimized voice information without a separate operation of the driver.

In addition, the car audio system and its control method according to the present invention has an effect that can generate an audio signal with improved sound quality characteristics without adding a separate component.

1 is a view showing an embodiment of the configuration of a car audio system of the present invention.
2 is a flowchart illustrating an embodiment of a control method of a car audio system according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement the present invention. However, the scope of the present invention is not limited by the following examples. In addition, in describing this invention, the same code | symbol is attached | subjected to the same code | symbol and the repeated description is abbreviate | omitted.

The car audio system of the present invention provides the driver with a more accurate and optimized sound quality audio signal by adjusting the output level of a predetermined frequency region of the audio signal according to the engine state information of the vehicle. Looking at the configuration according to an embodiment of Figure 1 as follows.

1 is a view showing an embodiment of the configuration of a car audio system of the present invention.

As shown in FIG. 1, an embodiment of a car audio system according to the present invention includes an engine controller 100, a signal processing controller 110, and a signal processor 120.

The engine controller 100 detects engine state information of the vehicle. For example, the engine control unit 100 may control the automatic transmission in the form of an electronic control unit (ECU) that controls the state of the engine, the automatic transmission, and the ABS of the vehicle by a computer, as well as the driving system, the braking system, and the steering. It can control all parts of the vehicle such as the system.

Taking the engine control of the engine control unit 100 as an example, the engine state information is detected by detecting RPM information of the engine, engine state information and engine torque information according to the degree of pressing of the pedal (excel, accelerator), and the like. It transmits to the process control part 110, and controls the engine of a vehicle accordingly.

Here, the engine control unit 100 receives the engine state information, such as the engine RPM information, the engine state information and the engine torque information according to the degree of depressing the pedal (Excel, accelerator) of the engine described above, the signal processing control unit 110. Can be forwarded to

CAN (Controller Area Network) communication is a vehicle network communication means for a multi-communication method for communication between three or more different electronic devices. CAN communication, for example, connects several electronic control units in parallel with two wires and processes information exchange between electronic control units in priority order. It is applied to.

By transmitting the engine status information using CAN communication as described above, the car audio system of the present invention can provide an optimized function without additional parts or additional communication channels.

The signal processing controller 110 outputs a control signal for adjusting an output level of a predetermined frequency region of the audio signal according to the engine state information detected by the engine controller 100.

The signal processor 120 generates an audio signal to be output to the vehicle by adjusting the output level of the audio signal according to the control signal of the signal processing controller 110.

For example, the signal processor 120 may amplify the output of the frequency domain of the audio signal corresponding to the noise frequency region of the engine calculated according to the engine state information described above among the frequency domains of the audio signal, which will be described later. Let's do it.

As described above, the car audio system of the present invention calculates a frequency region of noise generated according to engine state information such as engine RPM (rpm) information, engine state information and engine torque information according to the degree of pedal depressing, and generates audio. By compensating the same frequency range of the signal to optimize the audio sound quality, the driver can provide stable sound source information.

Here, as an example of the engine state information, look at the formula for calculating the frequency by the number of revolutions of the engine as follows.

Figure pat00001

<Equation 1. Calculation of the noise frequency according to the engine speed (RPM) of the vehicle>

As in the above formula, the noise frequency of the engine can be calculated according to the engine speed. For example, when the engine is a second order (four cylinder) engine at 2500 RPM, engine noise having a frequency range of about 83 Hz is introduced into the vehicle.

When the vehicle is running, the engine speed is not fixed at one RPM but is changed in real time, so the engine noise is also changed. As can be seen from the equation, since the engine noise of the vehicle is mostly in the low frequency range, the sound quality may be impaired, especially when listening to an audio signal in a music mode with a lot of low sounds.

The car audio system of the present invention can calculate the noise frequency of the engine according to the engine speed, and map and store it in a timetable in advance. When the engine speed is detected according to the mapped timetable, the mapped noise frequency region may be calculated and the audio signal compensation process may be performed accordingly.

In addition, not only the engine speed (rpm / rpm), but also the noise frequency region of the engine according to the engine state information and the engine torque information according to the degree of press of the pedal (excel, accelerator) and the frequency range of the corresponding audio signal By amplifying the signal, the reliability of the audio signal listening degree can be improved.

That is, the digital signal processor of the signal processor 120, for example, a parametric equalizer (Parametric Equalizer filter) to adjust the output level of the frequency in real time to automatically compensate so that the sound source is not impaired. As a result, a more accurate real-time noise compensation process can be performed to provide the driver with optimal sound quality at all times.

The engine control unit 100 continuously detects the engine state information in real time thereafter and transmits the engine state information to the signal processing control unit 110 after the vehicle is turned on. Accordingly, the signal processing unit 120 may perform an audio signal compensation process. To optimize the sound quality.

For example, by amplifying the output of the frequency region of the audio signal corresponding to the noise frequency region of the engine, a noise masking effect can be obtained, and an accurate audio signal can be efficiently delivered to the driver.

In addition, in one embodiment of the car audio system of the present invention, the signal processor 120 compensates the frequency domain of the audio signal in the music mode, which will be described in detail later.

As described above, by compensating the audio signal by grasping the engine state information of the present invention, it is possible to receive a reliable audio signal without a separate component or the driver's operation, thereby improving the driver's convenience. have.

 2 is a flowchart illustrating an embodiment of a control method of a car audio system according to the present invention.

As shown in Figure 2, one embodiment of the control method of the car audio system of the present invention first checks the starting state of the vehicle (S210).

If the vehicle is started, the engine state information of the vehicle is detected (S220).

Here, the engine state information may include the engine RPM information, the engine state information and the engine torque information according to the pressing degree of the pedal (excel).

The noise frequency region of the engine according to the detected engine state information is calculated (S230).

Here, in the control method of the car audio system of the present invention, the noise frequency of the engine according to the engine speed may be calculated and mapped and stored in a timetable in advance.

That is, as in Equation 1, the noise frequency of the engine according to the engine speed can be calculated. For example, if the engine is a secondary order (four cylinder) when the engine is 2500 RPM, it is possible to calculate that engine noise having a frequency range of about 83 Hz is generated.

In addition, since the engine speed is changed in real time when the vehicle is running, the noise frequency range of the engine is also changed. The sound quality may be improved by compensating the audio signal differently according to the variable noise frequency region.

As described above, by applying the timetable to which the noise frequency region of the engine is mapped according to the engine state information, when the engine speed is detected, the mapped noise frequency region may be calculated immediately and the audio signal compensation process may be performed accordingly.

In addition, the engine state information may include not only the engine speed (rpm / rpm), but also engine state information and engine torque information according to the degree of pressing of the pedal (excel, accelerator). As such, the noise frequency region of the engine according to the engine state information and the engine torque information according to the pressing degree of the pedal (Excel, accelerator) may also be mapped and the frequency region of the corresponding audio signal may be amplified to optimize and compensate the audio signal. .

Here, the engine torque information may be calculated according to the force for operating the engine, that is, the load applied to the engine, and thus the noise frequency region of the engine may be calculated and mapped.

When the noise frequency region of the engine is calculated as described above, the output level of the frequency region of the audio signal of the vehicle may be adjusted accordingly.

For example, by amplifying the output of the frequency region of the audio signal corresponding to the noise frequency region of the engine, it is possible to provide more stable voice information to the driver by compensating the frequency region of the audio signal disturbed by the noise.

Here, the audio signal may compensate for the frequency domain of the audio signal of the music mode.

That is, the sound source mode of the audio signal may be analyzed (S240), and if the audio signal is the audio signal of the voice mode, a noise reduction filter for the voice may be set to compensate for the frequency domain of the audio signal according to the noise frequency region of the engine ( S252).

In addition, when the audio signal is an audio signal of the music mode, a music equalizer filter may be set (S251), and the sound quality may be compensated by amplifying the output level of the frequency region of the audio signal according to the noise frequency region of the engine.

In the case of the audio signal in the music mode, the volume level of the reproduction volume may be determined to compensate the audio signal differently.

That is, it is determined whether the volume of the playback volume is greater than or equal to the reference level (S260). If the volume of the playback volume is greater than or equal to the reference level, the process of compensating for the music audio signal according to the noise of the engine may not be performed. The audio signal may be compensated by amplifying the output level of the frequency domain of the music audio signal according to the noise frequency region of the signal (S270).

As described above, in the control method of the car audio system according to the exemplary embodiment of the present invention, the audio signal having a volume level large enough not to be disturbed by the noise of the engine does not perform a compensation process, thereby saving battery consumption.

As described above, the control method of the car audio system of the present invention may provide the driver with more reliable voice information by calculating a noise frequency region of the engine according to the engine state information and compensating the audio signal accordingly.

In addition, the car audio system of the present invention calculates a frequency range of noise generated according to engine state information, such as engine revolutions per minute (RPM) information of the engine, engine state information and engine torque information according to the degree of pedal depressing, and generates an audio signal. In addition to compensating the same frequency range, the compensating process may be performed according to the characteristics of the audio signal to provide stable and high-quality sound source information to the driver.

In addition, it is possible to receive a reliable audio signal without a separate component or the operator's operation, thereby improving the convenience of the driver.

As described above, the car audio system and its control method of the present invention can maximize the convenience of the driver and achieve high quality and reliable audio signal by achieving the advanced and multifunctional multimedia in the vehicle without adding any additional parts or communication channels. To provide.

In addition, by using the engine state information of the vehicle, which has not been used in the past, the function of the vehicle is improved so that the driver can concentrate on driving by controlling the output of the audio signal efficiently and conveniently.

Thus, the sound source information is effectively transmitted by finely adjusting the audio signal using the engine state information.

The car audio system and the control method thereof according to the present invention provide the driver with more accurate and stable voice information by applying engine information to an audio signal processing process, and the technical idea of the present invention implemented through the car audio system. Any modifications made to any of these forms will be considered to be encompassed by the present invention.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

100: engine control unit 110: signal processing control unit
120: Signal processor

Claims (10)

An engine control unit detecting engine state information of the vehicle;
A signal processing controller for outputting a control signal for adjusting an output level of a predetermined frequency region of the audio signal according to the engine state information detected by the engine controller; And
A signal processor which generates the audio signal according to the control signal;
Car audio system comprising a. The method of claim 1,
And the signal processor amplifies the output of the frequency domain of the audio signal corresponding to the noise frequency domain of the engine calculated according to the engine state information. The method of claim 2,
The audio signal is a car audio system, characterized in that the audio signal of the music mode. The method of claim 1,
The engine state information includes the engine revolutions per minute (RPM) information, the engine state information and engine torque information according to the degree of pressing the pedal, characterized in that the car audio system. The method of claim 4, wherein
The engine controller detects the engine state information in real time and transmits it to the signal processing controller. Detecting engine state information of the vehicle when the vehicle is started;
Calculating a noise frequency region of the engine according to the detected engine state information; And
Adjusting an output level of a frequency domain of an audio signal of the vehicle according to a noise frequency domain of the engine;
Car audio system control method comprising a. The method according to claim 6,
And amplifying the output of the frequency domain of the audio signal corresponding to the noise frequency domain of the engine. The method of claim 7, wherein
The audio signal is a control method of the car audio system, characterized in that the audio signal in the music mode. The method according to claim 6,
The engine state information includes the engine revolutions per minute (RPM) information, the engine state information and engine torque information according to the degree of pressing the pedal, characterized in that the control method of the car audio system. The method of claim 9,
The noise frequency region of the engine according to the engine state information is mapped and stored in advance.
KR1020110079987A 2011-08-11 2011-08-11 Car audio system and control method thereof KR20130017513A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899556A (en) * 2021-09-27 2022-01-07 上海柴油机股份有限公司 Method for identifying engine gear squeaking noise

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113899556A (en) * 2021-09-27 2022-01-07 上海柴油机股份有限公司 Method for identifying engine gear squeaking noise

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