KR101704927B1 - Method for calibrating sound source and apparatus for processing audio signals using the method - Google Patents

Method for calibrating sound source and apparatus for processing audio signals using the method Download PDF

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Publication number
KR101704927B1
KR101704927B1 KR1020150148603A KR20150148603A KR101704927B1 KR 101704927 B1 KR101704927 B1 KR 101704927B1 KR 1020150148603 A KR1020150148603 A KR 1020150148603A KR 20150148603 A KR20150148603 A KR 20150148603A KR 101704927 B1 KR101704927 B1 KR 101704927B1
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sound source
audio data
digital audio
digital
analog
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KR1020150148603A
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Korean (ko)
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최정원
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최정원
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • 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
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)

Abstract

Disclosed are an audio apparatus and a method for calibrating a sound source. The audio apparatus comprises: a sound source storage unit storing a sound source file; a digital-to-analog conversion unit converting first digital audio data input from the sound source storage unit to a first analog audio signal; an output unit outputting the first analog audio signal; a microphone unit detecting a sound source; an analog-to-digital conversion unit converting a second analog audio signal detected by the microphone unit to second digital audio data; and a sound source calibration unit analyzing the difference between digital audio data of a sound source file and second digital audio data, and calibrating the digital audio data input to the digital-to-analog conversion unit by using the analyzed difference so that the second digital audio file can be close to the digital audio data of the sound source file.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of calibrating a sound source using a microphone,

The present invention relates to a method for correcting an input sound source so that a sound close to original audio data can be delivered to a listener by eliminating a difference between an audio signal and a sound source file output from an audio device for reproducing a sound source file, It is about.

When a person speaks or sings, he / she constantly adjusts the size and tone of the voice by listening to the voice with his or her ear. It is to adjust the voice based on the voice heard in the ear considering the surrounding noise, the state of the person's neck, and the distance to the other party. Thus, hearing and vocalization are closely related, and for this reason, it is difficult for the deaf to speak.

On the other hand, currently used audio devices operate as a one-way type. In other words, the sound source is converted into analog audio signal in DAC (Digital to Analog Converter), and it is changed into sound through the amplifier and speaker (Speaker). When the sound source file is reproduced and outputted, the original sound is adjusted based on the output signal There is no device to do.

Therefore, there is a problem that sounds produced by the same digital sound source are variously displayed depending on the audio apparatus or the situation. This is because the analog audio signal converted and output by the DAC may be different for each DAC. This is because the characteristics of these devices are reflected while the analog audio signals output from the DAC are changed to sounds through amplifiers, speakers, and the like. Also, the sound may be different depending on the noise in the listening environment, the size of the space, the characteristics of the space, and the like.

When making a digital sound source, it is necessary to have a method of outputting a sound close to the original sound source since the best sound is digitized in the studio.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide an audio device and a sound source correcting method for outputting a sound as close as possible to the original sound source, .

According to an aspect of the present invention, there is provided an audio apparatus comprising: a sound source storage for storing a sound source file; A digital / analog converter for converting the first digital audio data input from the sound source storage unit into a first analog audio signal; An output unit for outputting the first analog audio signal; A microphone unit for sensing a sound source; An analog / digital converter for converting a second analog audio signal detected by the microphone into second digital audio data; Wherein the first digital audio data and the second digital audio data are generated by analyzing a difference between the digital audio data of the sound source file and the second digital audio data and using the analyzed difference to bring the second digital audio data closer to the digital audio data of the sound source file And a sound source correction unit for correcting input digital audio data.

Wherein the sound source correction section separates the second digital audio data by a band and compares the second digital audio data with a corresponding band part of the digital audio data of the sound source file and outputs the intensity of each band part of the second digital audio data The digital audio data input to the digital / analog converter may be corrected so that the digital audio data is the same as the corresponding frequency band of the digital audio data of the sound source file.

Wherein the sound source correction unit separates the second digital audio data for each band and compares the second digital audio data with a corresponding band part of the digital audio data of the sound source file and outputs a sync signal of each band part of the second digital audio data Sync) is equal to a corresponding band part of the digital audio data of the sound source file.

Wherein the speaker unit includes a plurality of speakers and the sound source correction unit compares a portion of the second digital audio data corresponding to a signal output from each of the plurality of speakers with a corresponding portion of the digital audio data of the sound source file, The digital audio data to be input to the digital-analog converter is corrected so that the sync of the signal output from each of the plurality of speakers becomes the same as the corresponding portion of the digital audio data of the sound source file according to the result of the comparison have.

Wherein the sound source correcting unit deduces a sound field effect that is closest to the second digital audio data when applied to the digital audio data of the sound source file and outputs the analogous sound field effect to the digital audio data input to the digital- It can be applied in reverse.

According to another aspect of the present invention, there is provided a method for correcting a sound source, the method comprising: converting first digital audio data input from a sound source storage for storing a sound source file into a first analog audio signal through a digital / analog converter; Sensing a sound source through a microphone; Converting a second analog audio signal sensed by the microphone unit into second digital audio data; Wherein the first digital audio data and the second digital audio data are generated by analyzing a difference between the digital audio data of the sound source file and the second digital audio data and using the analyzed difference to bring the second digital audio data closer to the digital audio data of the sound source file And correcting the input digital audio data.

According to the present invention, even if the configuration modules of the audio device are changed or the performance is changed, the listener can hear sounds close to the original digital sound source.

Also, according to the present invention, the listener can hear a sound close to the original digital sound source even in various listening environments.

FIG. 1 is a functional block diagram for explaining a configuration of an audio device capable of correcting a sound source according to an embodiment of the present invention. Referring to FIG.
2 is a flowchart illustrating a sound source correction method according to an embodiment of the present invention.
3 to 5 are views for explaining the principle of correcting a distorted sound source in an audio apparatus according to an embodiment of the present invention.

The terms used in this specification will be briefly described and the present invention will be described in detail.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. Also, in certain cases, there may be a term selected arbitrarily by the applicant, in which case the meaning thereof will be described in detail in the description of the corresponding invention. Therefore, the term used in the present invention should be defined based on the meaning of the term, not on the name of a simple term, but on the entire contents of the present invention.

When an element is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements as well, without departing from the spirit or scope of the present invention. The term " means ", "part "," module ", etc. in the specification means units for processing at least one function or operation, Lt; / RTI >

Hereinafter, 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 carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

FIG. 1 is a functional block diagram for explaining a configuration of an audio device capable of correcting a sound source according to an embodiment of the present invention. Referring to FIG.

The audio apparatus 100 is a device capable of reproducing a sound source and is a device for reproducing a sound source file stored in the sound source storage unit 110 and outputting the sound source file to a speaker as the sound source output unit 130. The audio apparatus 100 may be any device that has a predetermined sound source storage medium such as a mobile communication terminal, an MP3 player, a CD player, an MD player, or a computer capable of reproducing sound sources and reproduces sound sources stored in the sound source storage medium. Can be implemented.

The sound source storage unit 110 may include a storage medium for storing a sound source file and a module for driving the storage medium. The storage medium may be a hard disk, a flash memory, a CD, an MD, a USB memory, Can be used.

The digital audio data of the sound source file is input to a digital to analog converter (DAC) 120 and converted into a first analog audio signal. The converted first analog audio signal is output through an output unit 130 The sound is audible. The output unit 130 may include an amplifier for amplifying an analog audio signal and a speaker.

The audio apparatus 100 according to the present invention may include a microphone unit 140 and an analog to digital converter unit (ADC) 140 to output the sound to the output unit 130 so that the sound heard by the listener is the same as the data of the first sound source file. Digital converter 150, and a sound source correcting unit 160.

The audio data of the sound source file stored in the sound source storage unit 110 may be changed by reflecting the characteristics of the module while being processed through the respective modules of the audio apparatus 100 and may be changed through the output unit 130 The sound being heard is not heard by the listener, but the output audio signal is changed according to the characteristics of the space, and the ambient noise is mixed to the listener.

The microphone unit 140 detects a sound source heard by the listener, and the analog / digital converter 150 converts the second analog audio signal received by the microphone unit 140 into second digital audio data.

The digital audio data of the first sound source file of the sound source storage unit 110 is transmitted through modules such as a digital / analog conversion unit 120, an output unit 130, a microphone unit 140, and an analog / digital conversion unit 150 The sound source correcting unit 160 may compare the digital audio data of the first sound source file and the second digital audio data output from the analog / digital converting unit 150 with each other, And analyzes the difference.

The sound source correcting unit 160 corrects the digital audio data input to the digital / analog converting unit 120 so that the second digital audio data is close to the digital audio data of the sound source file, using the analyzed difference. That is, the sound source that is finally input to the digital-analog converter 120 is modified so that the sound heard by the listener is maximally the same as the audio data stored in the original sound source file.

The sound source correction unit 160 will be described in more detail with reference to FIG. 2 and FIG.

FIG. 2 is a flow chart for explaining a sound source correction method according to an embodiment of the present invention, and FIGS. 3 to 5 are views for explaining a principle of correcting a distorted sound source in an audio device according to an embodiment of the present invention

Referring to FIG. 2, the first digital audio data is input from the sound source storage 110 to the digital-analog converter 120 (S202).

The digital / analog converter 120 converts the input first digital audio data to analog and outputs a first analog audio signal (S204). The first analog audio signal is output as a sound through the speaker of the output unit 130 (S206).

3, the first digital audio data 310 output from the sound source storage unit 110 and input to the digital-to-analog conversion unit 120 is input to the digital / analog conversion unit 120 and the output unit 130 And is output to the first analog audio signal 320. In this process, the audio data of the original sound file can be changed and distorted through the output unit 130 including the digital / analog converter 120, the amplifier and the speaker, and the intensity, speed, and tone of the sound source.

Meanwhile, the microphone unit 140 senses the sound source (S208). The micro-input sound source may include not only the speaker output sound source but also surrounding noise or sound. 3, the second analog audio signal 330 sensed by the microphone unit 140 may be different from the first analog audio signal 320 output from the speaker.

The second analog audio signal 330 sensed through the microphone unit 140 is converted into digital audio data 340 again by the analog / digital conversion unit 150 (S210).

The sound source correcting unit 160 compares the second digital audio data 340 output from the analog / digital converting unit 150 with the digital audio data 310 of the sound source file to analyze the difference (S212).

By using the thus-analyzed difference, a compensation signal capable of bringing the second digital audio data 340 close to the digital audio data 310 of the sound source file is generated, and by applying the generated compensation signal, (Step S214).

Various methods are used to correct the digital audio data of the sound source file input to the original sound, that is, the digital / analog converter 120, to find the portion to be corrected for the digital audio data of the sound source file and to apply a compensation signal can do.

For example, the sound source correction unit 160 separates the second digital audio data by the frequency band, compares the second digital audio data with the corresponding frequency band portion of the digital audio data of the sound source file stored in the sound source storage unit 110, 2 digital audio data to be input to the digital / analog converter 120 so that the intensity of each band of the digital audio data is the same as the corresponding band of the digital audio data of the sound source file.

Specifically, if the treble portion of the second digital audio data is stronger than that of the sound source, and if the treble portion of the second digital audio data is stronger than that of the sound source, So that the sound heard by the listener can be corrected so as to be the same as or almost similar to the data of the sound source file.

On the contrary, if the treble portion of the second digital audio data is weaker than the sound source, the treble portion of the sound source digital audio data is strongly adjusted. If the second digital audio data is weaker than the sound source, So that the sound heard by the listener can be corrected so as to be the same as or almost similar to the data of the sound source file.

Figs. 4 and 5 illustrate the sound source correction as described above.

FIG. 4 is a graph showing the comparison between the digital audio data 310 of the sound source file and the second digital audio data 340 outputted when the sound source is not corrected. The portion 410 indicated by the lattice pattern (▩) And the part marked with a diagonal pattern (▨) represents a band with a stronger intensity than the original sound.

Referring to FIG. 5, in order to apply the analyzed difference to the digital audio data 310 of the original sound file, the band of weakened intensity is strengthened more strongly as the intensity is weakened, and the band of stronger intensity is stronger So that the corrected sound source 510 can be generated.

On the other hand, when a plurality of speakers are included in the output unit 130, there is a case in which the sound bands output from the respective speakers are out of sync with each other or the sound is out of synchronization with the sound of the space. It is necessary to correct the digital audio data.

To this end, the sound source correction unit 160 separates the second digital audio data by the frequency band, compares the second digital audio data with the corresponding frequency band portion of the digital audio data of the sound source file, The digital audio data input to the digital-to-analog converter 120 can be corrected so that the sync is the same as the corresponding band portion of the digital audio data of the sound source file.

Specifically, if the high-frequency band is heard by the listener a little faster than the low-frequency band, the digital audio data of the sound source file storing the original sound may be delayed in synchronization with the middle band or corrected so that the low- DAC 120 so that the listener can listen to the sound that is synchronized with the original sound.

Alternatively, the sound source correction unit 160 may compare the portion corresponding to the signal output from each of the plurality of speakers in the second digital audio data with the corresponding portion of the digital audio data in the sound source file, The digital audio data input to the digital-to-analog converter 120 can be corrected so that the sync of the signal output from each of the plurality of speakers becomes the same as the corresponding portion of the digital audio data of the sound source file.

Alternatively, the sound source correction unit 160 may infer the sound field effect that is the same as or closest to the second digital audio data when applied to the digital audio data of the sound source file, and outputs the same to the digital / analog conversion unit 120 A compensation signal for applying a sound field effect inferred from the above to the input digital audio data can be applied.

The sound source correction unit 160 may correct the digital audio data input to the digital / analog conversion unit 120 using at least a part of the above methods.

In addition, while the sound source file is being reproduced, the operation for correcting the sound source is continuously performed so that the contents of the correction are dynamically applied differently according to time,

When a user requests a test, a test portion is extracted from a sound source file and reproduced. An operation for correcting the sound source is performed, and the derived compensation signal can be applied until the reproduction of the corresponding sound source file is completed.

The method according to an embodiment of the present invention can be implemented in the form of a program command which can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like.

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, It belongs to the scope of right.

100: Audio device
110: sound source storage unit
120: Digital to Analog Converter (DAC)
130:
140: microphone section
150: Analog-to-Digital Converter (ADC)
160: Sound source correction unit

Claims (11)

A sound source storage for storing a sound source file;
A digital / analog converter for converting the first digital audio data input from the sound source storage unit into a first analog audio signal;
An output unit for outputting the first analog audio signal;
A microphone unit for sensing a sound source;
An analog / digital converter for converting a second analog audio signal detected by the microphone into second digital audio data;
Wherein the first digital audio data and the second digital audio data are generated by analyzing a difference between the digital audio data of the sound source file and the second digital audio data and using the analyzed difference to bring the second digital audio data closer to the digital audio data of the sound source file And a sound source correction unit for correcting the input digital audio data,

Wherein the output section includes a plurality of speakers,

Wherein the sound source correction unit comprises:
Comparing a portion of the second digital audio data corresponding to a signal output from each of the plurality of speakers with a corresponding portion of digital audio data of the sound source file, and outputting, as a result of the comparison, The digital audio data to be input to the digital-analog converter is corrected so that the sync of the digital audio data of the sound source file becomes the same as the corresponding portion of the digital audio data of the sound source file,

Wherein a portion corresponding to a signal output from each of the plurality of speakers is data obtained by separating the second digital audio data by a band. delete delete delete delete Converting the first digital audio data input from the sound source storage unit storing the sound source file into a first analog audio signal through a digital / analog conversion unit and outputting the first analog audio signal through an output unit;
Sensing a sound source through a microphone;
Converting a second analog audio signal sensed by the microphone unit into second digital audio data through an analog / digital converter;
The sound source correction unit may analyze a difference between the digital audio data of the sound source file and the second digital audio data, and determine the difference between the digital audio data of the sound source file and the digital audio data of the sound source file And correcting the digital audio data input to the digital / analog conversion unit,

Wherein the output section includes a plurality of speakers,

Wherein the sound source correction unit comprises:
Comparing a portion of the second digital audio data corresponding to a signal output from each of the plurality of speakers with a corresponding portion of digital audio data of the sound source file, and outputting, as a result of the comparison, The digital audio data to be input to the digital-analog converter is corrected so that the sync of the digital audio data of the sound source file becomes the same as the corresponding portion of the digital audio data of the sound source file,

Wherein a portion corresponding to a signal output from each of the plurality of speakers is data obtained by separating the second digital audio data by a band. delete delete delete delete A computer program recorded on a recording medium for performing a sound source correction method,
The sound source correction method, which is executed by an audio device,
Converting the first digital audio data input from the sound source storage unit storing the sound source file into a first analog audio signal through a digital / analog conversion unit and outputting the first analog audio signal through an output unit;
Sensing a sound source through a microphone;
Converting a second analog audio signal sensed by the microphone into second digital audio data through an analog / digital converter;
The sound source correction unit may analyze a difference between the digital audio data of the sound source file and the second digital audio data, and determine the difference between the digital audio data of the sound source file and the digital audio data of the sound source file And correcting the digital audio data input to the digital / analog conversion unit,

Wherein the output section includes a plurality of speakers,

Wherein the sound source correction unit comprises:
Comparing a portion of the second digital audio data corresponding to a signal output from each of the plurality of speakers with a corresponding portion of digital audio data of the sound source file, and outputting, as a result of the comparison, The digital audio data to be input to the digital-analog converter is corrected so that the sync of the digital audio data of the sound source file becomes the same as the corresponding portion of the digital audio data of the sound source file,

Wherein a portion corresponding to a signal output from each of the plurality of speakers is data obtained by separating the second digital audio data by a band.
KR1020150148603A 2015-10-26 2015-10-26 Method for calibrating sound source and apparatus for processing audio signals using the method KR101704927B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018143484A1 (en) * 2017-01-31 2018-08-09 최정원 Sound source correction method using microphone, and audio device using same
KR102076362B1 (en) * 2018-12-12 2020-02-11 박소희 Piezo speaker block assembly with woofer and sound control system thereof

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KR20150084136A (en) * 2014-01-13 2015-07-22 삼성전자주식회사 Audio Outputting Control Method and Electronic Device supporting the same
KR101536650B1 (en) * 2014-04-15 2015-07-22 지엔에스티 주식회사 A method for controlling voice signal and Device including the Same

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Publication number Priority date Publication date Assignee Title
KR20060040547A (en) * 2004-11-04 2006-05-10 (주)지엔씨 Apparatus for compensating sound in an audio set and method thereof
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