KR20160072660A - Apparatus and Method for tracking sound using energy ratio value of sound signal - Google Patents

Apparatus and Method for tracking sound using energy ratio value of sound signal Download PDF

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Publication number
KR20160072660A
KR20160072660A KR1020140180600A KR20140180600A KR20160072660A KR 20160072660 A KR20160072660 A KR 20160072660A KR 1020140180600 A KR1020140180600 A KR 1020140180600A KR 20140180600 A KR20140180600 A KR 20140180600A KR 20160072660 A KR20160072660 A KR 20160072660A
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South Korea
Prior art keywords
sound source
energy ratio
sound
tracking
ratio value
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KR1020140180600A
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Korean (ko)
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김재광
장윤호
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현대자동차주식회사
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Priority to KR1020140180600A priority Critical patent/KR20160072660A/en
Publication of KR20160072660A publication Critical patent/KR20160072660A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/013—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over
    • B60R21/0134—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting collisions, impending collisions or roll-over responsive to imminent contact with an obstacle, e.g. using radar systems
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units, or advanced driver assistance systems for ensuring comfort, stability and safety or drive control systems for propelling or retarding the vehicle
    • B60W30/08—Active safety systems predicting or avoiding probable or impending collision or attempting to minimise its consequences
    • B60W30/095—Predicting travel path or likelihood of collision
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S11/00—Systems for determining distance or velocity not using reflection or reradiation
    • G01S11/14—Systems for determining distance or velocity not using reflection or reradiation using ultrasonic, sonic, or infrasonic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic, or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
    • G01S3/801—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers

Abstract

The present invention can detect the position of a sound source (for example, a sound) to be tracked by using the energy ratio value of sound data of each channel received from a multi-channel microphone, A sound source tracking apparatus and method using an energy ratio value of a sound signal that can be prevented are provided.
A sound source tracking apparatus using an energy ratio value of an acoustic signal according to an embodiment of the present invention includes a data storage unit for acquiring and storing acoustic data from a multi-channel microphone, ambient sound data, A data analyzing unit for calculating an energy ratio value of the sound source recognized and determined by the sound source recognizing unit, and a sound source tracking unit for tracking the position of the sound source using the energy ratio value of the sound source.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound source tracking apparatus and method using an energy ratio value of a sound signal,

The present invention relates to a sound source tracking apparatus and method using an energy ratio value of an acoustic signal, and more particularly, to a technique for tracking a sound source position using an energy ratio value received from a multi-channel microphone.

Generally, the sound source positioning technology sets two microphones at different positions in an arbitrary space, and determines the position of the corresponding sound source based on the arrival time difference of the sound source signals that occur in the same sound source and arrive at the two microphones.

Most important in the sound source location tracking technique is tracking performance (e.g., accuracy, etc.), such as the performance and number of microphones, the placement of microphones, the degree of noise and echo, The estimation performance is deteriorated by the elements.

Here, it is easy to predict the direction of the sound source based on the arrival time difference of the sound source signals arriving at the two microphones, but it is very difficult to know the exact location of the sound source.

If a sound source tracking technology capable of detecting the exact position of the sound source is proposed, it is possible to recognize not only the direction of the sound source generating object in the vehicle or the robot application but also the exact position of the sound source, It will be possible to use it for an application that can recognize the location of a sound source.

The present invention can detect the position of a sound source (for example, a sound) to be tracked by using the energy ratio value of sound data of each channel received from a multi-channel microphone, A sound source tracking apparatus and method using an energy ratio value of a sound signal that can be prevented are provided.

Other objects and advantages of the present invention will become apparent from the following description, and it will be understood by those skilled in the art that the present invention is not limited thereto. It is to be easily understood that the objects and advantages of the present invention can be realized by means of the means shown in the claims and combinations thereof.

A sound source tracking apparatus using an energy ratio value of an acoustic signal according to an embodiment of the present invention includes a data storage unit for acquiring and storing ambient sound data from a multi-channel microphone, a sound source to be tracked in the surrounding sound data, A data analyzing unit for calculating an energy ratio value of the sound source recognized and determined by the sound source recognizing unit, and a sound source tracking unit for tracking the position of the sound source using the energy ratio value of the sound source.

Also, the sound source tracking unit compares the energy ratio value of the sound data of each channel received from the multi-channel microphones with the energy ratio value of the sound source among the surrounding sound data received in real time, and based on the most similar energy ratio value The location of the sound source can be tracked.

The navigation system may further include a video and audio announcement unit for audibly emitting an audible sound in the vehicle to track the location of the sound source and recognizing the sound source by a driver or displaying a horn signal on the in-vehicle display device.

In the data analysis unit,

Figure pat00001

The energy ratio value of the sound source can be calculated according to the above equation.

The sound source tracking unit may track the location of the sound source using a function-based location tracking method or a table-based location tracking method.

According to an embodiment of the present invention, a sound source tracking method using an energy ratio value of an acoustic signal includes the steps of acquiring and storing surrounding sound data from a multi-channel microphone, recognizing and determining a sound source to be tracked in the surrounding sound data Calculating an energy ratio value of the sound source recognized and determined from the sound source recognizing unit, and tracking the position of the sound source using the energy ratio value of the sound source.

Also, the step of tracking the position of the sound source using the energy ratio value of the sound source may include: calculating an energy ratio value of the sound data for each of the plurality of channels received from the multi-channel microphones, The position of the sound source can be tracked based on the most similar energy ratio value.

The method may further include tracking a location of the sound source, then sounding a hall sound in the vehicle so that the driver recognizes the sound source, or displaying a horn signal on the in-vehicle display device.

The step of calculating the energy ratio value of the sound source may include:

Figure pat00002

The energy ratio value of the sound source can be calculated according to the above equation.

In addition, the step of tracking the position of the sound source may use a function value based position tracking method or a table based position tracking method.

This technology can reduce the risk of vehicle collision by grasping not only the direction of the sound source but also the location of the sound source.

In addition, the present technology can grasp the position of the sound source using the energy ratio value of the sound source, and can grasp the situation in the forward direction of the vehicle.

In addition, this technology can alert and notify the location of sound sources of other vehicles when approaching other vehicles.

1 is a block diagram illustrating a sound source tracking apparatus using an energy ratio of an acoustic signal according to an embodiment of the present invention.
2 is a view for explaining energy ratios of acoustic signals according to an embodiment of the present invention.
3 is a view for explaining energy ratios in two channels according to an embodiment of the present invention.
4 is a view for explaining energy ratios in three channels according to an embodiment of the present invention.
5 is a view for explaining a position tracking method according to an embodiment of the present invention.
6 is a view for explaining a position tracking method according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, It can be easily carried out. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a sound source tracking apparatus using an energy ratio of an acoustic signal according to an embodiment of the present invention.

Referring to FIG. 1, a sound source tracking apparatus using an energy ratio of sound signals includes a data storage unit 100, a sound source recognition unit 110, a data analysis unit 120, and a sound source tracking unit 130. The sound source tracking device includes a multi-channel microphone 105 for receiving acoustic data of the surroundings, an image in which the driver can check the sound source or the horn signal from the other vehicle by displaying a horn signal on the in- And may further include a voice notification unit 140.

The data storage unit 100 acquires and stores surrounding sound data from the multi-channel microphone 105. For example, acoustic data received from a first microphone, acoustic data received from a second microphone, and acoustic data received from a third microphone.

The sound source recognition unit 110 recognizes and determines the sound source to be tracked among the surrounding sound data. For example, a sound source to be tracked is recognized among sound data including a horn of a vehicle, a siren, or an engine sound.

The data analysis unit 120 analyzes the sound source (e.g., the horn of the vehicle) recognized and determined by the sound source recognition unit 110. [ That is, the data analysis unit 120 may calculate the energy ratio value of the sound source.

Here, a specific method of calculating the energy ratio value of the sound source (vehicle horn) is described with reference to FIG.

The sound source tracking unit 130 tracks the specific location of the sound source using the energy ratio value of the sound source (the horn of the vehicle).

The sound source tracking unit 130 can estimate the position by substituting the energy ratio values of the sound source calculated by the data analysis unit 120 into a function of the predefined energy ratio and distance. Also, the position can be estimated by comparing the calculated energy ratio value of the sound source with the energy ratio value of the sound data per channel received from the pre-calculated multi-channel microphone 105 to find the sound source most similar to each other.

Specifically, the energy ratio values of the sound data of the multi-channel microphone 105 provided when it is assumed that sound sources are generated at various positions are calculated in advance, and the sound source (horn of the vehicle) among the respective sound data received in real- The energy ratio value of the sound data is compared with the energy ratio value of the sound source (vehicle horn) among the respective sound data received in real time in the case where it is assumed that the sound source occurs at the candidate position, Track the position of the source based on the energy ratio value.

Here, a method of informing the driver to recognize the sound source after tracking the position of the sound source may be performed by sounding a sound in the vehicle through the in-vehicle image and sound notification unit 140 or displaying a horn signal on the in-vehicle display device .

2 is a view for explaining energy ratios of acoustic signals according to an embodiment of the present invention.

Referring to FIG. 2, the energy value E i of the sound signal generated from the sound source 200 to be tracked decreases in inverse proportion to the distance d i as follows. More specifically, the distance from the sound source 200 decreases and is inversely proportional to the square value of the distance d i .

Figure pat00003

For example, the energy ratio value A of the sound signal generated in the sound source 200 can be calculated according to the position of the multi-channel microphone.

For example, when the first microphone 210 is spaced from the sound source 200 by a distance D and the second microphone 220 is spaced from the sound source 200 by a distance D + d, energy values in the first microphone (210), (E 1) and to an energy value (E 2) of the second microphone 220 can be calculated by using, as expression.

Figure pat00004

Where E 1 is the energy value from the first microphone 210 and E 2 is the energy value from the second microphone 220.

3 is a view for explaining energy ratio values in two channels according to an embodiment of the present invention.

Referring to FIG. 3, the energy ratio values of the acoustic signals (two channels) received from the first microphone 210 and the second microphone 220 are shown, and the first microphone 210 and the second microphone 220 ) Have the same energy ratio value.

4 is a view for explaining energy ratio values in three channels according to an embodiment of the present invention.

Referring to FIG. 4, the energy ratio values of the acoustic signals (three channels) received from the first microphone 210, the second microphone 220 and the third microphone 230 are shown, ), The second microphone 220, and the third microphone 230 may predefine energy ratio values according to their respective positions.

5 is a view for explaining a position tracking method according to an embodiment of the present invention.

Referring to FIG. 5, a method of tracking a position value based on a function value is described. The energy ratio values in an acoustic signal calculated in real time from the microphone 1 210, the microphone 2 220, and the microphone 3 230, And recognizes that the three functions A31, A12, and A23 meet in common, so that the position of the sound source can be tracked.

6 is a view for explaining a position tracking method according to another embodiment of the present invention.

Referring to FIG. 6, a table-based position tracking method will be described. The energy ratio value is previously defined for each candidate location of sound source generation, and the energy ratio values A12, A23, and A31, The candidate position having the most similar energy ratio value can be tracked as the position of the sound source.

As described above, the present technique can reduce the risk of collision of the vehicle by grasping not only the direction of the sound source but also the position of the sound source.

In addition, the present technology can grasp the position of the sound source using the energy ratio value of the sound source, and can grasp the situation in the forward direction of the vehicle.

In addition, this technology can alert and notify the location of sound sources of other vehicles when approaching other vehicles.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, Various modifications and variations may be made without departing from the scope of the appended claims.

Claims (10)

A data storage unit for acquiring and storing surrounding sound data from a multi-channel microphone;
A sound source recognition unit for recognizing and determining a sound source to be tracked among the surrounding sound data;
A data analysis unit for calculating an energy ratio value of the sound source recognized and determined by the sound source recognition unit; And
A sound source tracking unit for tracking the position of the sound source using the energy ratio value of the sound source;
And an energy ratio of the acoustic signal. The method according to claim 1,
Wherein the sound source tracking unit compares an energy ratio value of the sound data for each of the plurality of channels received from the multi-channel microphones with an energy ratio value of the sound source among the surrounding sound data received in real time, Wherein the position of the sound source is tracked. The method according to claim 1,
Further comprising an image and sound notification unit for sounding an honk sound in the vehicle to track the position of the sound source and recognizing the sound source by the driver or displaying a horn signal to the in-vehicle display device Source Tracking System Using Ratio. The method according to claim 1,
In the data analysis unit,
Figure pat00005

Wherein the energy ratio value of the sound source is calculated according to the equation. The method according to claim 1,
Wherein the sound source tracking unit tracks the position of the sound source using a function value based position tracking method or a table based position tracking method. Acquiring and storing surrounding sound data from a multi-channel microphone;
Recognizing and determining a sound source to be tracked among the surrounding sound data;
Calculating an energy ratio value of the sound source recognized and determined by the sound source recognition unit; And
And tracking the position of the sound source using the energy ratio value of the sound source
Wherein the sound source tracking method uses acoustic signal processing. The method of claim 6,
Wherein the step of tracking the position of the sound source using the energy ratio value of the sound source comprises:
Channel sound data received from the multi-channel microphones with the energy ratio value of the sound source among the surrounding sound source data received in real time and tracks the position of the sound source based on the most similar energy ratio value Wherein the sound source tracking method uses an energy ratio of an acoustic signal. The method of claim 6,
Further comprising the steps of: tracking the position of the sound source and then sounding an honk sound in the vehicle so that the driver recognizes the sound source; and displaying a horn signal on the in-vehicle display device Tracking the sound source. The method of claim 6,
Wherein the step of calculating the energy ratio value of the sound source comprises:
Figure pat00006

Wherein the energy ratio value of the sound source is calculated according to the equation. The method of claim 6,
Wherein the step of tracking the location of the sound source comprises:
A method of tracking a sound source using an energy ratio of acoustic signals, characterized by using a function value based position tracking method or a table based position tracking method.
KR1020140180600A 2014-12-15 2014-12-15 Apparatus and Method for tracking sound using energy ratio value of sound signal KR20160072660A (en)

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