KR20060040547A - Apparatus for compensating sound in an audio set and method thereof - Google Patents

Abstract

The present invention provides a method and apparatus for correcting a playback sound source to prevent the case that the sound quality of the first stored sound is deformed and transmitted to the user when the sound source stored in the audio device is reproduced and output to the sound source output unit. It is about. An audio device for reproducing a digital sound source according to an embodiment of the present invention includes a sound source storage unit for storing predetermined first digital sound source data; A digital / analog converter converting the first digital sound source data into a first analog sound source signal; A sound source reproducing unit reproducing the first analog sound signal; A sound source output unit configured to output the reproduced first analog sound source signal; A sound source input unit configured to receive a predetermined second analog sound source signal output from the sound source output unit; An analog / digital converting unit converting the second analog sound source signal into second digital sound source data; A comparator configured to compare the first digital sound source data and the second digital sound source data and generate comparison result data; And a control unit controlling the sound source reproducing unit so that the reproduced first analog sound source signal is corrected according to the comparison result data. According to the present invention, the quality of the sound source output to the sound source output unit can be improved by correcting the sound source to be reproduced according to the performance of the sound source output unit when reproducing the sound source stored in the sound source storage medium by measuring the performance of the sound source output unit in advance in the audio device. .

Audio device, sound source, correction, speaker

Description

Apparatus and method for compensating sound sources in audio equipment {APPARATUS FOR COMPENSATING SOUND IN AN AUDIO SET AND METHOD THEREOF}

1 is a diagram illustrating a wavelength of a sound source corresponding to an audible frequency in a general audio device.

FIG. 2 is a diagram illustrating a change in amplitude of a first analog sound source signal as a conventional audio device converts first digital sound source data into a first analog sound source signal and then amplifies the first analog sound source signal.

3 is a diagram illustrating that a signal having a sound quality different from that of a sound source signal initially stored in a conventional audio device is output to a speaker.

4 is a diagram illustrating a configuration of an apparatus for correcting a sound source in an audio device according to an embodiment of the present invention.

5 is a diagram illustrating a process of correcting based on comparison result data after a second analog signal output from a sound source output unit is input through a sound source input unit in an audio device according to an embodiment of the present invention.

FIG. 6 is a diagram illustrating a process of converting a second analog sound signal signal amplified by an analog / digital converter into second digital sound data in an audio device according to an embodiment of the present invention.                 

7 illustrates an example of sampling an analog signal into digital data in an audio device according to an embodiment of the present invention.

8 is a diagram illustrating an example of adjusting a pulse width of a digital signal in an audio device according to an embodiment of the present invention.

FIG. 9 is a diagram illustrating a configuration of an apparatus capable of performing sound source correction using two audio devices as another embodiment of the present invention.

10 is a diagram illustrating a configuration of an apparatus for correcting a sound source in an audio device according to another embodiment of the present invention.

11 and 12 are flowcharts illustrating a method of correcting a sound source in an audio device according to an embodiment of the present invention.

FIG. 13 is a flowchart of a method of adjusting an equalizer function of another second audio device in a first audio device according to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

400: first sound source correction device

401: sound source storage unit 402: digital / analog converter

403: first sound source amplifier 404: sound source playback unit

405: sound source output unit 406: sound source input unit

407: analog / digital converter 408: second sound source amplifier

409: comparison unit 410: control unit

411: correction data storage unit 412: display unit                 

413: equalizer input

910: first audio device

911: sound source storage unit 912: sound source providing unit

913: sound source input unit 914: comparison unit

915: display unit

920: second audio device

921: sound source input unit 922: sound source playback unit

923: sound source output unit 924: equalizer input unit

925 equalizer adjustment unit

1000: second sound source correction device

1010: sound source storage unit 1020: sound source playback unit

1030: sound source output unit 1040: sound source input unit

1050: comparison unit 1060: control unit

The present invention relates to a method and a device for correcting a sound source in an audio device, and more particularly, when a sound source stored in the audio device is reproduced and output to a sound source output unit, the sound quality of the first stored sound source is modified by the characteristics of the sound source output unit. The present invention relates to a method and a device for correcting a playback sound source in order to prevent transmission to a user.

In general, an audio device reproduces sound sources stored in various sound source storage media such as audio tapes and CDs, and outputs them through a speaker. An audio frequency band of a sound source that can be heard by an audio device is about 20 Hz to about 20,000 Hz, as shown in FIG. 1, and is divided into low and high ranges according to frequencies.

1 is a diagram illustrating a wavelength of a sound source corresponding to an audible frequency in an audio device. The first signal 110 includes sound source data in a low tone region including 20 sine wave periods for one second. Signal 120 represents the sound source data of the treble region each containing 20,000 sine wave periods for one second.

Digital audio equipment, which is widely used today, includes a digital-to-analog converter (D / A converter) and an amplifier circuit for converting a stored sound source stored in a digital form into an analog form. 2 and 3, a process of deforming the sound quality of the storage sound source at the output unit in the digital audio device will be described.

2 is a diagram illustrating an amplitude change of a first analog sound source signal as a digital audio device converts first digital sound source data into a first analog sound source signal and then amplifies the first analog sound source signal.

Referring to FIG. 2, the first to third sound sources 210 to 230 have different frequencies representing low, mid, and high sounds, and are used to compare sound sources corresponding to low, mid, and high sounds, respectively. The first sound source 210 is the digital sound source data of the bass region 50Hz frequency, the second sound source 220 is the digital sound source data of the midrange region 500Hz frequency, the third sound source 230 is 5,000Hz frequency The digital sound source data in the high-pitched sound region is converted into analog signals by digital / analog converting means, and then the amplitude change of each signal is amplified by the amplifying unit and output to the speaker.

3 is a diagram illustrating that a signal having a sound quality different from that of a sound source initially stored in a conventional audio device is output to a speaker.

In FIG. 3, a case in which the characteristics of the speaker mounted in the conventional audio device outputs a low bass region and a high treble region will be described as an example. The first sound source 310 to the third sound source 330 represent cases where the frequencies of the digital sound source data are 50 Hz, 500 Hz, and 5,000 Hz, respectively. The first analog sound source signals 311, 321, and 331 are signals reproduced after the analog sound source signals are amplified by the sound source amplifiers, respectively. The second analog sound source signals 312, 322, and 332 are analog sound source signals output through the speaker.

At this time, the sound amplitude of the second analog sound source signal 332 for the third sound source 330 is selected as the reference sound amplitude, and the second analog sound source signal 312 and the second sound source 320 for the first sound source 310 are selected. Comparing the relative sound width of the second analog sound source signal 322 with respect to), as follows. For example, the relative amplitude of the second analog sound source signal 312 with respect to the first sound source 310 is 0.4, and the relative sound width of the second analog sound source signal 322 with respect to the second sound source 320 is 0.8. do. The degree of change in sound width varies depending on the characteristics (or performance) of the speaker. The first analog sound source signals 311, 321, and 331 have a constant sound width regardless of frequency. However, while the second analog sound source signals 312, 322, and 332 pass through the speaker, the change in the sound width varies for each frequency according to the frequency characteristic of the speaker.

As described above, in the audio device, when a sound source stored in the sound source storage medium is reproduced and output to the speaker, a predetermined error occurs between the stored sound source and the output sound source according to the performance of the speaker. That is, in FIG. 3, the first analog sound source signal 311 for the first sound source 310: the first analog sound source signal 321 for the second sound source 320: the first analog sound for the third sound source 330. The ratio of the sound source signal 331 to the sound width is equal to 1: 1: 1. However, after being output from the speaker, the second analog sound source signal 312 for the first sound source 310: the second analog sound source signal 322 for the second sound source 320: to the third sound source 330. It can be seen that the ratio of the amplitude of the second analog sound source signal 332 to the sound width (volume of sound) varies from 0.4: 0.8: 1. The sound source stored in the storage medium and the sound source output to the speaker are composed of the sum of several different frequency components, and accordingly, as described above, their reproducibility is different for each frequency, so that an error occurs between the two sound sources.

In addition, portable audio devices such as MP3 players, MD players, and CD players are mainly used by connecting earphones with built-in speakers to sound source output terminals. In the internal speaker of the earphone having a relatively small size compared to the external speaker, there is a problem in that the sound quality is relatively low in the low range compared to the high range. In addition, depending on the specifications (type) of the speaker, there is a significant difference in the quality of the sound source output in analog. Therefore, the user who wants a higher quality output has to improve the sound quality through a method such as purchasing and mounting expensive high-performance speakers according to the sensitivity to the sound quality that can be felt.

In order to solve this problem, some audio devices provide an equalizer function that can compensate a signal for each frequency band. However, since the compensation of the sound source signal according to the equalizer function depends solely on the user's personal preference / sense, there is a problem that ups and downs may occur whenever the sensitivity of the hearing changes according to the physical condition of the user. In addition, it is troublesome to change the setting of the equalizer every time the characteristics of the reproduced sound source are changed.

In addition, in the conventional audio device, the sound quality delivered to the user may be changed when the location of the speaker or the type of the earphone is changed. Therefore, whenever the user changes the location of the speaker or the earphone, the equalizer function is directly adjusted depending on the user's hearing. It implies the inconvenience of doing it.

The present invention has been made to solve the above problems, and provides an apparatus and method for correcting the sound source to be reproduced according to the performance of the sound source output unit measured in advance when playing the sound source stored in the sound source storage medium in the audio device For the purpose of

In addition, an object of the present invention is to compare the sound source stored in the audio device and the output sound source output to the speaker and when the difference exceeds a predetermined error range, the device and method for correcting the error of the sound source when playing the stored sound source To provide.

Another object of the present invention is to provide an apparatus and method for measuring the performance of a sound source output unit of another audio device having an equalizer function in an audio device and displaying the result.

In addition, another object of the present invention, the device for allowing the user to adjust the equalizer function according to their preferences by displaying the result of comparing the output sound source and the stored original sound source according to the characteristics of the sound source output unit in the audio device having an equalizer function And a method thereof.

Another object of the present invention is to automatically correct a sound source so that a sound source of the same quality is provided regardless of a change of the sound source output unit by automatically grasping the characteristic of the changed sound source output unit when the sound source output unit is changed in the audio device. An apparatus and method are provided.

An audio device for reproducing a digital sound source according to an embodiment of the present invention for achieving the above object comprises: a sound source storage unit for storing predetermined first digital sound source data; A digital / analog converter converting the first digital sound source data into a first analog sound source signal; A sound source reproducing unit reproducing the first analog sound signal; A sound source output unit configured to output the reproduced first analog sound source signal; A sound source input unit configured to receive a predetermined second analog sound source signal output from the sound source output unit; An analog / digital converting unit converting the second analog sound source signal into second digital sound source data; A comparator for comparing the first digital sound source data and the second digital sound source data to generate a comparison result data; And a control unit controlling the sound source reproducing unit so that the reproduced first analog sound source signal is corrected according to the comparison result data.

In addition, as a technical configuration for achieving the above object, a sound source correction method of a digital audio device includes the steps of storing a predetermined test sound source and a predetermined reproduction sound source; Decoding the test sound source into first digital sound source data; Converting the first digital sound source data into a first analog sound source; Playing the first analog sound source; Outputting the reproduced first analog sound source through a predetermined output means; Receiving a second analog sound source output from the output means through a predetermined input means; Converting the second analog sound source into second digital sound source data; Comparing the first digital sound source data with the second digital sound source data; Generating predetermined correction data according to the comparison result; Correcting the reproduced sound source with reference to the correction data when reproducing the reproduced sound source; And outputting the corrected reproduction sound source through the output means.

The term "analog sound signal" widely used in the present invention refers to data obtained by converting a conventional sound signal into an electric signal, and stores the amplitude of the sound as an analog signal, such as data stored on an audio tape. It is a concept that collectively refers to data.                     

The term " digital sound data " widely used in the present invention refers to dividing the analog sound source signal into predetermined time units, sampling the divided analog signal sizes, and digitally digitizing and storing them. It is a concept that collectively refers to data. The digital sound source data becomes high quality digital data as the sampling value is higher, that is, the shorter the time interval divided by the time unit.

The "audio device" used in the present invention includes a predetermined sound source storage medium such as a mobile communication terminal capable of playing a sound source, an MP3 player, a CD player, an MD player, a computer capable of playing sound sources, and the like. It is interpreted as a concept that collectively refers to a device that reproduces and outputs to a sound source output unit.

The "sound source input unit" used in the present invention may be implemented as a microphone built in the audio device or a microphone connected to a sound source input terminal of the audio device, and the "sound source output unit" is a predetermined speaker connected to the audio device. It can be implemented as.

Hereinafter, a method and apparatus for calibrating a sound source in an audio device will be described with reference to the accompanying drawings.

FIG. 4 is a diagram illustrating a configuration of an apparatus for correcting a sound source in an audio device according to an embodiment of the present invention. The apparatus for correcting a sound source may be included in an audio device and operate.

Referring to FIG. 4, the sound source correcting apparatus 400 includes a sound source storage unit 401, a digital / analog converter 402, a first sound source amplifier 403, a sound source playback unit 404, and a sound source output unit 405. ), The sound source input unit 406, the second sound source amplifier 407, the analog / digital converter 408, the comparator 409, the control unit 410, the correction data storage unit 411, the display unit 412 ), And an equalizer input unit 413.

The sound source storage unit 401 stores predetermined first digital sound source data. The sound source storage unit 401 may record or delete the first digital sound source data, and may be implemented as a flash memory, a hard disk, a CD, an MD, etc., which may maintain the stored first digital sound source data even when the power is cut off. Can be. The first digital sound source data includes a test sound source file of any one of music, voice, and effect sound. The first digital sound source data may be converted into a digital signal by sampling an analog sound source signal in time units, and compressing the converted digital signal by using a predetermined compression technique, thereby maintaining a certain sound quality while reducing data capacity. It may be a compressed sound file. The compressed sound source file may be a sound source file compressed by MP3 technology, or a sound source file compressed according to various digital formats other than MP3 technology.

The test sound source file may be a digital sound source file corresponding to a sine wave of a fixed frequency as shown in FIG. 1. The reason why the sine wave is used in the present invention is that a Fourier transform can be easily performed to convert a general analog sound source signal into digital sound source data, thereby converting the waveform into a waveform having a plurality of wavelengths. In other words, a sine wave having a single frequency is reproduced as a single frequency even if the Fourier transform is performed, and since it is a single frequency even if converted to digital without performing the Fourier transform, the sine wave is predictable and simple. In addition, the sine wave can easily convert an analog signal into digital data as shown in FIG.

The digital / analog converter 402 receives the first digital sound source data from the sound source storage unit 401 and receives the first digital sound source data DA1, DA2, and DA3, respectively, as shown in FIG. 2. Converts to analog sound source signals 211, 221, 231.

The first sound source amplifier 403 receives the first analog sound source signals 211, 221, and 231 output from the digital / analog converter 402, and amplifies the amplified signal according to a pre-calibrated amplification rate. 1 Outputs the analog sound source signals 212, 222, 232.

The sound source reproducing unit 404 receives the amplified first analog sound source signals 212, 222, and 232 output from the first sound source amplifying unit 403, and reproduces the amplified first analog sound source signals.

The sound source output unit 405 reproduces the first analog sound source signal by the audio reproducing unit 404 and outputs the second analog sound source signals 213, 223, and 233. The sound source output unit 405 is a predetermined speaker connected to the sound source output terminal (speaker terminal or earphone terminal) of the audio device and includes an external speaker or a speaker built into the earphone.

The sound source output unit 405 may be significantly different in sound quality due to the difference in performance depending on the type of the speaker. The sound quality is not easily defined because it is related to the user's sense of listening to the sound source output through the sound source output unit 405. However, according to the present invention, the sound quality can be compared using an electrically converted value such as the sound width.

The sound source input unit 406 receives the second analog sound source signal output from the sound source output unit 405. The sound source input unit 406 may be a microphone directly embedded in the audio device or a microphone connected through a sound source input terminal of the audio device. The sound source input unit 406 may be calibrated by the user so that the sound width of the input second analog sound signal is 1: 1, or may be calibrated like the sound source output unit 405 during the manufacturing process of the audio device. The calibration basically uses a standard sound wave to match the signal of the sound source input unit 406 and the signal of the second sound source amplifier 407. The calibration method electrically generates a sine wave like a function generator, and outputs an electrical voltage / current value and a sound source input unit 406 of the first sound source amplifier 403 before outputting the sine wave to the sound source output unit 405. ) May be used to match the electrical voltage / current values inputted by the second sound source amplifier 407 and amplified by the second sound source amplification unit 407, and then convert the data into values applicable to the audio device. The value actually input to the sound source input unit 406 also makes a correction for the linearity of the output voltage according to the frequency since the products vary. Since the sound source input unit 406 is an accessory fixed to an audio device, the sound source input unit 406 is fixed, but the sound source output unit 405 such as an earphone or a speaker may be changed at any time according to a user's preference. The sound source input unit 406 may perform a calibration by the user so that the sound source output unit 405 is replaced accordingly.                     

The second sound source amplifier 407 receives the second analog sound source signal from the sound source input unit 406 and amplifies the second analog sound source signal according to the calibrated amplification factor.

The analog / digital converter 408 receives the second analog sound source signal amplified by the second sound source amplifier 407 and converts the second analog sound source signal into second digital sound source data.

The comparator 409 receives the first digital sound source data from the sound source storage unit 401 and the second digital sound source data from the analog / digital converter 408 to compare and compare the two digital sound source data. Generate result data. As an example of a comparison method performed by the comparator 409, a sound width (amplitude) of the first digital sound source data and the second digital sound source data may be compared for each of a plurality of frequency bands. The comparator 409 compares the first digital sound source data and the second digital sound source data corresponding to time frames in order to more easily perform amplitude comparison between the digital data.

As another example of the comparison method, the comparison unit 109 compares the ringing of the first digital sound source data and the second digital sound source data for each frequency. The ringing comparison is performed by dividing the intervals of the digital data for each time frame, and shortening the frame interval to further refine the accuracy.

The comparator 409 compares each time within a wavelength according to a frequency of a predetermined test sound source, and extracts the smallest value (minimum value) and the largest value (maximum value) and designates it as a predetermined reference value.

The controller 410 receives the comparison result data from the comparator 409 and controls the sound source reproducing unit 404 to correct the reproduced first analog sound source signal according to the comparison result data.

As an example of a correction criterion, if it is determined by the comparison result data that the error between the first digital sound source data and the second digital sound source data is greater than or equal to a predetermined reference value, the control unit 410 controls the first digital sound source data and the first data. 2 The sound source reproducing unit 404 is controlled so that the reproduced first analog sound source signal is corrected so that the error of the digital sound source data is less than a predetermined reference value.

For example, the controller 410 may output a sound source reproducing unit when the bass portion of the output sound source output to the sound source output unit 405 is smaller than the stored sound source stored in the sound source storage unit 401 by the comparison result data. In operation 404, the low sound region of the stored sound source is enhanced (amplified) when the stored sound source is reproduced. Then, the sound source output unit 405 outputs a sound source having the same level as that of the stored sound source as the low sound region is enhanced by the sound source correction by the controller 410 during sound source reproduction.

In addition, the control unit 410 is a sound source playback unit 404 when the high-pitched portion of the output sound source output to the sound source output unit 405 by the comparison result data is larger than the stored sound source stored in the sound source storage unit 401 When the stored sound source is reproduced in the control), the treble region of the stored sound source is reduced (reduced). Then, when the sound source output unit 405 outputs the sound source of which the high sound region is lowered according to the sound source correction by the controller 410 when the sound source is reproduced, the sound quality of the same level as the stored sound source is output.

The controller 410 controls the digital / analog converter 402 to adjust the pulse width of the first digital sound source data to solve the ringing of the test sound source.

In order to control the sound source reproducing unit 404, the control unit 410 performs a correction operation before converting the first digital sound source data into a first analog signal or at the time of reproducing the first analog signal according to the comparison result data. do. As an example, the controller 410 may include a filter and an amplifier, and may be corrected by adjusting gain.

The correction data storage unit 411 receives the correction data from the control unit 410 and stores the correction data. The comparison unit 409 converts the comparison result data into equalizer data for correcting a predetermined sound source. You can print To this end, the comparator 409 designates a comparison target frequency for each frequency band of a predetermined test sound source, and analyzes a relative comparison value between the smallest value and the largest value for each specified frequency by sound width, thereby equalizing for each frequency band. You can create settings.

The equalizer may be implemented by combining a plurality of audio filters, and the controller 410 may automatically control each filter of the equalizer so that a correction operation is automatically performed according to the generated setting value for each frequency band. .

As such, when the digital audio device according to the present invention includes an equalizer, the sound quality of the output unit may be automatically corrected to be close to the original sound by receiving the output of the sound source output unit through the sound source input unit and operating the correction function of the equalizer by itself. You will get the effect.

As another embodiment of the correction operation by the equalizer, the correction according to the user's input will be described. The audio device according to the present invention includes a display unit 412, and the display unit 412 receives equalizer data corresponding to the comparison result data from the controller 410 and displays the input equalizer data for each frequency band. . In addition, the equalizer input unit 413 receives the setting value according to the equalizer adjustment request input by the user after checking the equalizer data displayed through the display unit 412 according to his / her preference, and the controller 410 receives the input value. The correction operation is performed according to the setting value.

As the sound source correction device according to an embodiment of the present invention reproduces the first digital sound source data recorded in the storage medium, the analog sound source signal outputted to the speaker is fed back to the second digital sound source data, and then the first By comparing the digital sound source data and the second digital sound source data and compensating for the difference, the sound source closer to the original sound can be output to the speaker.

5 is a diagram illustrating a process of correcting based on comparison result data after a second analog signal output from a sound source output unit is input through a sound source input unit in an audio device according to an embodiment of the present invention.

A case in which the frequencies of the first digital sound source data are 50 Hz, 500 Hz, and 5,000 Hz, respectively, will be described with reference to FIGS. 4 and 5. The first analog sound source signals 511, 521, and 531 are signals that are reproduced through the sound source playback unit 404 after the first analog sound source signals are amplified by the sound source amplifier 403, respectively, and the amplitude ratio is 1: 1: 1. The second analog sound source signals 512, 522, and 532 are analog sound source signals output through the sound source output unit 404. When the sound width of the third sound source 530 is selected as 1, the sound width of the second sound source 520 is set to 0.8, and the sound width of the first sound source 510 is set to 0.4. The third analog sound source signals 513, 523, and 533 are signals output after amplifying and correcting the second analog sound source signals 512, 522, and 523 as appropriate.

The second analog sound source signals 512, 522, and 532 outputted through the speaker and inputted back to the sound source input unit 406 are 0.4: 0.8: 1 in amplitude, respectively, so that the control unit 410 controls the sound source playback unit 404. When reproducing a sound source corresponding to the corresponding frequency, multiply and amplify 2.5, 1.25, and 1 as correction data, respectively, so that the amplitude ratio is 1: 1: 1. Thus, the corrected sound source may have the same sound quality as the stored sound source. In the embodiment according to FIG. 5, a method of correcting amplification by amplitude amplification through amplitude comparison is illustrated. However, even in the case where various types of sound quality deformations occur in addition to the amplitude deformation, the data is first stored based on the comparison result data of the comparison unit. Various correction methods may be used to allow the same level of sound quality to be reproduced as the sound source.

FIG. 6 is a diagram illustrating a process of converting a second analog sound signal signal amplified by the analog / digital converter 408 into second digital sound data in an audio device according to an embodiment of the present invention.

4 and 6, the analog / digital converter 408 may sample and convert the amplified second analog sound source signal into 8-bit or 16-bit digital data 610, 620, and 630.

7 is a diagram illustrating an example of sampling an analog signal into digital data in an audio device according to the present invention. 4 and 7, the analog / digital converter 408 may generate the digital data 710 by sampling the amplified second analog sound source signal at predetermined time intervals.

8 is a diagram illustrating an example of adjusting a sampling pulse width of digital sound source data according to comparison result data in an audio device according to an embodiment of the present invention.

4 and 8, the third pulse width t3 has a longer time duration than the second pulse width t2 and the first pulse width t1. If the output sound source transmitted to the user through the output unit 405 is loud due to the third pulse width, the controller 410 controls the digital / analog converter 402 to set the pulse width as the second or By narrowing down like the 1st pulse width, it becomes possible to compensate the sound of a sound source more faithfully.

Alternatively, the controller 410 may adjust the ringing by using a echo function to reduce the volume while overlapping the same sound.

FIG. 9 illustrates an apparatus capable of performing sound source correction using two audio devices as another embodiment of the present invention.

9 is a diagram illustrating a configuration of a sound source correcting apparatus that detects a sound source output state of a second audio device by using a first audio device and adjusts an equalizer function of the second audio device. According to the present exemplary embodiment, the first audio device receives the sound source output from another second audio device to generate equalizer data for correcting the speaker performance of the second audio device, and the second audio device is applied to the equalizer data. By correcting the reproduced sound source, it is possible to output a sound source of a sound quality close to the initially stored sound source. Hereinafter, the configuration of the sound source correction apparatus according to the present embodiment will be described in detail.

Referring to FIG. 9, the first audio device 910 includes a sound source storage unit 911, a sound source providing unit 912, a sound source input unit 913, a comparator 914, and a display unit 915.

The sound source storage unit 911 stores a predetermined first test sound source. In the present invention, the first test sound source is mainly used as a sine wave sound source. The use of the sine wave sound source as the test sound source is because the height of the sound can be easily adjusted based on the wavelength of each sound source according to a result of comparing the test sound source stored in the storage medium with the sound source output to the speaker. The first test sound source may represent various genres of music such as jazz, ballad, rock, or classical music. In addition, the first test sound source may represent voices of various pitches, such as low, mid, and high. The first test sound source may represent various effect sounds such as wind sounds, water sounds, and the like. Alternatively, when the first test sound source is stored as digital sound source data, the first test sound source may store the frequency characteristics as it is.

The sound source providing unit 912 provides the first test sound source stored in the first audio device 910 to the second audio device 920. To this end, the sound source providing unit 912 is connected to the second audio device 920 through a predetermined cable to transmit the first test sound source to the second audio device 920 or to wireless communication such as infrared communication or Bluetooth. The transmission may also be transmitted to the second audio device 920 through.

The sound source input unit 913 receives a second test sound source output from the second audio device 920. The sound source input unit 913 may be a microphone built in the first audio device 910 or a microphone connected to a sound source input terminal of the first audio device 910.

The comparator 914 compares the first test sound source with the second test sound source and outputs equalizer data according to the result. The comparator 914 is configured to generate a first digital value for the smallest value (minimum value) and the largest value (maximum value) of the first and second tester sound sources when the first and second test sound sources are single frequencies, respectively. The comparison result data (for example, equalizer data) corresponding to the result of comparing the sound source data with the second digital sound source data is output. The display unit 915 receives equalizer data output from the comparator 914 and displays the equalizer data. The comparison result data generated as described above is applied to the second audio device to be used for the correction operation.

The second audio device 920 includes a sound source input unit 921, a sound source playback unit 922, a sound source output unit 923, an equalizer input unit 924, and an equalizer adjustment unit 925.

The sound source input unit 921 receives the first test sound source from the first audio device 910. The sound source reproducing unit 922 reproduces the first test sound source. The sound source output unit 923 outputs the reproduced first test sound source to the second test sound source through a predetermined speaker. As described above, the output second test sound source is transmitted to the first audio device again to generate comparison result data in the first audio device.                     

When the user checks the equalizer data displayed through the display unit 915 of the first audio device 910 and requests an equalizer adjustment, the equalizer input unit 924 receives an equalizer adjustment request corresponding thereto. The equalizer adjusting unit 925 adjusts an equalizer function in response to the equalizer adjusting request input from the equalizer input unit 924. Therefore, the pitch correction of the second audio device is possible.

FIG. 10 is a diagram illustrating a configuration of an apparatus for correcting a sound source in an audio device according to another exemplary embodiment. The second sound source correcting apparatus 1000 includes a sound source storage unit 1010 and a sound source playback unit 1020. ), A sound source output unit 1030, a sound source input unit 1040, a comparison unit 1050, and a control unit 1060. While FIG. 4 illustrates a sound source correcting apparatus limited to a digital audio apparatus, the present invention will be described with reference to a sound source correcting apparatus applicable to not only digital audio apparatus but also other forms of audio apparatus.

4 and 10, the sound source storage unit 1010 stores predetermined sound source data. The sound source data may be analog sound source signals or digital sound source data, or may be test sound source data for correcting sound sources or sound source data to be actually reproduced.

The sound source reproducing unit 1020 reproduces the sound source data as a first sound source signal. When the sound source data is the first digital sound source data, the sound source playback unit 1020 may convert the first digital sound source data into a first analog sound source signal, and then amplify and reproduce the first analog sound source signal. The sound source reproducing unit 1020 may amplify and reproduce the first analog sound source signal when the sound source data is the first analog sound source signal. Unlike the sound source correcting apparatus 400, the second sound source correcting apparatus 1000 is a digital / analog converting means for converting the first digital sound source data into a first analog sound signal in the sound source reproducing unit 1020 or the first analog sound source. Sound source amplification means for amplifying a signal can be built in.

The sound source output unit 1030 outputs the reproduced first sound source signal (first analog sound source signal) as a predetermined speaker connected to an audio device. The sound source input unit 1040 receives the second sound source signal (second analog sound source signal) output from the sound source output unit 1030.

The comparison unit 1050 compares the sound source data or the first sound source signal stored in the sound source storage unit 1010 with the second sound source signal. The comparison unit 1050 compares the first digital sound source data corresponding to the sound source data and the second digital sound source data corresponding to the second sound source signal when the sound source data and the second sound source signal are digital sound source data. The comparison result data corresponding to the result is output. When the sound source data is digital sound source data and the second sound source signal is an analog signal, the comparator 1050 converts the second sound source signal into digital sound source data, compares the digital sound source data, and corresponds to the result. Outputs the comparison result data. Unlike the sound source correcting apparatus 400, the second sound source correcting apparatus 1000 may include an analog / digital converting means in the comparator 1050. In addition, unlike the sound source correcting apparatus 400, the second sound source correcting apparatus 1000 includes, in the comparing unit 1050, a sound source amplifying means for amplifying an analog signal input from the sound source input unit 1040, and the comparing unit 1050. ) Amplifies the second sound source signal to a predetermined size, converts the second sound source data into second digital sound source data, and compares the digital sound source data with each other, and outputs comparison result data corresponding to the result. When the sound source data is an analog sound source signal, the comparison unit 1050 directly compares the second sound source signal and outputs comparison result data corresponding to the result.

The controller 1060 controls the sound source reproducing unit 1020 to correct the reproduced first sound source signal according to the comparison result data from the comparator 1050. The controller 1060 may display the comparison result data through predetermined display means (not shown).

Functions of each component that are not described above in the embodiments described with reference to FIGS. 9 and 10 may be omitted as the contents described in the embodiments of FIG. 4 may be applied as they are.

The sound source correcting apparatus according to the present invention converts the stored digital data and the output analog sound signal into digital data, compares and corrects the difference, and compares the analog sound source to be reproduced with the analog sound source output to the speaker. It will be apparent to those skilled in the art that the same technical matters can be applied even when correcting the difference.

11 and 12 are flowcharts illustrating a method of correcting a sound source in an audio device according to an embodiment of the present invention.                     

11 and 12, in step 1101, the audio device stores a test sound source to be tested and a reproduction sound source to be reproduced in predetermined memory means. The test sound source is data in which a predetermined standard digital sound source is classified for each frequency. In step 1102, the audio device decodes the test sound source into first digital sound source data. In step 1103, the audio device converts the first digital sound source data into a first analog sound source. In step 1104, the audio device amplifies the first analog sound source. In step 1105, the audio device plays the amplified first analog sound source. In step 1106, the audio device outputs the reproduced first analog sound source through a predetermined sound source output means.

In step 1107, the audio device receives a second analog sound source output through the sound source output means. In step 1108, the audio device amplifies the second analog sound source. In step 1109, the audio device converts the first analog sound source into second digital sound source data. In operation 1110, the audio device compares the first digital sound source data with the second digital sound source data. In operation 1111, the audio device generates correction data according to the comparison result.

In step 1112, the audio device corrects the playback sound source when playing the playback sound source according to the correction data. In step 1113, the audio device outputs the reproduced sound source through the sound source output means.

As described above, the audio device according to the present invention can output a sound source as close to the original sound as possible by correcting when playing the stored sound source according to a result of comparing the sound source output from the sound source output means such as a speaker with the sound source recorded in the storage medium. There is an advantage to this.

In a further embodiment according to the present invention, the correction data determined according to the characteristics of the speaker is stored in a predetermined server system for each type of speaker, so that the user can store the stored correction data according to the type of the speaker built in his / her own audio device. After downloading, it is possible to perform sound source correction of its own audio device. That is, in addition to the steps of FIGS. 11 and 12, the sound source correction method according to the present invention includes the steps of storing the correction data in a predetermined server system, and downloading the correction data from the server system. The method may further include correcting the second reproduced sound source with reference to the downloaded correction data when the second reproduced sound source is reproduced with respect to the digital audio device.

According to the present embodiment, the correction data is stored in a predetermined server system for each sound power output unit in consideration of output characteristics of the sound source output unit. The second digital audio device downloads correction data corresponding to the type of its sound source output unit from the server system and corrects the reproduced sound source with reference to the downloaded correction data.

13 is a flowchart illustrating a method of adjusting an equalizer function of a second audio device in a first audio device according to an embodiment of the present invention.

Referring to FIG. 13, in step 1201, the first audio device stores a first test sound source in a predetermined memory means. In step 1202, the first audio device provides the first test sound source to the second audio device.

In step 1203, the second audio device receives (inputs) the first test sound source from the first audio device. In step 1204, the second audio device plays the first test sound source. In step 1205, the second audio device outputs a first test sound source to be reproduced.

In operation 1206, the first audio device receives a second test sound source output from the second audio device. In operation 1207, the first audio device compares the first test sound source with the second test sound source. In step 1208, the first audio device displays equalizer data according to the comparison result through a predetermined display means.

In step 1209, the second audio device receives an equalizer adjustment request from a user or the equalizer data from the first audio device. The user may check the equalizer data displayed by the display means of the first audio device and then adjust the equalizer function for the second audio device. In step 1210, the second audio device adjusts an equalizer function according to the equalizer adjustment request or the equalizer data when playing a sound source stored in a predetermined memory means. That is, the second audio device may adjust the equalizer function by the equalizer data based on the objective comparison result output from the first audio device, rather than simply adjusting the equalizer function by the user's sense.                     

In the sound source correction methods described with reference to FIGS. 11, 12, and 13, the descriptions of the sound source correction apparatus described above may be omitted.

Embodiments of the invention include a computer readable medium containing program instructions for performing various computer-implemented operations. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. The media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical recording media such as CD-ROMs, DVDs, magnetic-optical media such as floppy disks, and ROM, RAM, flash memory, and the like. Hardware devices specifically configured to store and execute the same program instructions are included. The medium may be a transmission medium such as an optical or metal wire, a waveguide, or the like including a carrier wave for transmitting a signal specifying a program command, a data structure, or the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like.

While specific embodiments of the present invention have been described so far, various modifications are possible without departing from the scope of the present invention.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the claims below, but also by the equivalents of the claims.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above-described embodiments, which can be variously modified and modified by those skilled in the art to which the present invention pertains. Modifications are possible. Accordingly, the spirit of the present invention should be understood only by the claims set forth below, and all equivalent or equivalent modifications thereof will belong to the scope of the present invention.

As can be seen from the above description, according to the present invention, an apparatus and method for correcting a sound source to be reproduced according to the performance of the sound source output unit when reproducing the sound source stored in the sound source storage medium by measuring the performance of the sound source output unit in advance in the audio device By providing the sound source output unit can output a sound source of a sound quality closer to the original sound.

Further, according to the present invention, there is provided an apparatus and method for comparing the sound source stored in the audio device and the output sound source output to the speaker and corrects the error of the sound source when playing the stored sound source when the difference exceeds a predetermined error range As a result, the sound quality of the sound source output to the speaker can be guaranteed to a certain level or more.

In addition, according to the present invention, by providing a device and a method for measuring the performance of the speaker of the other audio device having an equalizer function in the audio device and displays the results, the user of the audio device having the equalizer function own audio device It is easier to check the performance of the speaker mounted in the.                     

In addition, according to the present invention, by providing an apparatus and a method for displaying the result of comparing the output sound source and the stored original sound source according to the characteristics of the sound source output unit in the audio device having an equalizer function by the user only in his subjective sense Instead of relying on a more objective result through the display means, you can easily adjust the equalizer function to enjoy a closer sound quality.

In addition, according to the present invention, when the mounting position of the speaker or the type of the speaker is changed in the audio device, the apparatus and method for correcting the sound source to be reproduced when the sound source is reproduced by comparing the sound source and the stored sound output from the changed speaker accordingly By supplying the speaker, even if the speaker is changed, a sound source of higher quality can be output to the speaker by compensating for the sound source reproduced according to the performance of the changed sound source output unit.

Claims (14)

In an audio device for playing a digital sound source, A sound source storage unit which stores predetermined first digital sound source data; A digital / analog converter converting the first digital sound source data into a first analog sound source signal; A sound source reproducing unit reproducing the first analog sound signal; A sound source output unit configured to output the reproduced first analog sound source signal; A sound source input unit configured to receive a predetermined second analog sound source signal output from the sound source output unit; An analog / digital converting unit converting the second analog sound source signal into second digital sound source data; A comparator configured to compare the first digital sound source data and the second digital sound source data and generate comparison result data; And A controller configured to control the sound source reproducing unit so that the first analog sound signal to be reproduced is corrected according to the comparison result data Sound source correction device comprising a. The method of claim 1, And the first digital sound source data includes any one of music, voice, and effect sound as a predetermined test sound source file. The method of claim 1, The comparison result data is equalizer data, and the equalizer data includes an equalizer setting value for each frequency band. The method of claim 1, The comparison result data includes an error between the first digital sound source data and the second digital sound source data, and the control unit reproduces the sound source such that the reproduced first analog sound source signal is corrected such that the error is less than a predetermined reference value. Sound source correction device, characterized in that for controlling the wealth. The method of claim 1, The comparison unit compares the amplitudes of the first digital sound source data and the second digital sound source data for each of a plurality of frequency bands. The method of claim 1, The comparison unit compares the ringing of the first digital sound source data and the second digital sound source data for each frequency band. The method of claim 1, The comparator extracts a minimum value and a maximum value of the comparison result data for each frequency band and designates the reference value as a reference value. The method of claim 1, The controller controls the digital-to-analog converter to adjust the pulse width of the first digital data to solve the ringing of the test sound source. In a first audio device associated with a second audio device having a predetermined equalizer function, A sound source storage unit which stores a predetermined first test sound source; A sound source providing unit configured to provide the first test sound source to the second audio device; A sound source input unit configured to receive a second test sound source output from the second audio device; And A comparator configured to compare the first test sound source with the second test sound source and generate comparison result data Including, The second audio device Receiving the first test sound source from the first audio device and reproducing the second test sound source through a predetermined playback means, and adjusting the equalizer function based on the comparison result data from a user; Sound source correction device characterized in that. The method according to claim 1 or 9, The audio device includes a mobile communication terminal capable of reproducing a sound source, an MP3 player, a CD player, an MD player, or a computer capable of reproducing a sound source. In an audio device for playing a digital sound source, A sound source storage unit for storing predetermined sound source data; A sound source reproducing unit reproducing the sound source data as a first sound source signal; A sound source output unit configured to output the reproduced first sound source signal; A sound source input unit receiving a second sound source signal output from the sound source output unit; A comparator configured to generate a comparison result data by comparing the second sound source signal with the sound source data or the first sound source signal; And A controller configured to control the sound source reproducing unit so that the first sound source signal to be reproduced is corrected according to the comparison result data Sound source correction device comprising a. In the sound source correction method of a digital audio device that reproduces a sound source, Storing a predetermined playback sound source; Decoding the reproduced sound source into first digital sound source data; Converting the first digital sound source data into a first analog sound source; Playing the first analog sound source; Outputting the reproduced first analog sound source through a predetermined output means; Receiving a second analog sound source output from the output means through a predetermined input means; Converting the second analog sound source into second digital sound source data; Comparing the first digital sound source data with the second digital sound source data; Generating predetermined correction data according to the comparison result; Correcting the reproduced sound source with reference to the correction data when reproducing the reproduced sound source; And Outputting the corrected reproduction sound source through the output means; Sound source correction method comprising a. The method of claim 12, Storing the correction data in a predetermined server system; And Downloading the correction data from the server system and correcting the second reproduced sound source with reference to the downloaded correction data when reproducing a second reproduced sound source with respect to a second digital audio device; Sound source correction method further comprises. A computer-readable recording medium for recording a program for executing the method of claim 12 or 13 on a computer.

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