JP6056296B2 - Equalizer device and method for adjusting equalizer device - Google Patents

Description

  The present invention relates to an equalizer device that changes settings using a user's operation trajectory and an equalizer device adjustment method.

  Conventionally, when adjusting settings of an equalizer device, for example, band (frequency band) switching and gain change have been performed with a cross key. When the user interface is a touch panel, for example, there has been proposed an equalizer device that traces a gain curve corresponding to a frequency in a direction along the frequency axis and sets the traced locus as a gain (see Patent Document 1).

JP 2004-62503 A

  In the technique described in Patent Document 1, the frequency and signal gain of the start point, end point, maximum value, and minimum value of the trajectory are set as equalizer settings. The equalizer setting is reflected in the input signal by setting the gain for each predetermined frequency band, so interference occurs between the frequency bands and boosts, and the characteristics of the output signal are significantly different from the desired curve There is a risk of becoming. As a method of reflecting the equalizer setting, there is a method of further setting the Q value. However, it is very complicated and difficult to bring the characteristics of the output signal close to a desired curve.

  In view of the above problems, an object of the present invention is to provide an equalizer apparatus and an equalizer apparatus adjustment method that can easily set and reflect appropriate characteristics.

In order to achieve the above object, a first aspect of the present invention includes a signal input unit (1) for inputting an input signal, a first axis corresponding to a frequency, and a second corresponding to a gain that increases and decreases from 0 dB. A trajectory detection unit (21) that detects a trajectory of an operation on a detection region having an axis, a trajectory acquisition unit (31) that acquires a trajectory detected by the trajectory detection unit (21), and the trajectory acquisition unit (31) based on the obtained start point to the trajectory of the end point, the track acquiring unit (31) based gain determining unit for determining a reference gain in the second axis of the acquired locus (32), wherein the reference gain determination unit (32 ) based on the difference between the reference gain and the track acquiring unit (31) acquires the locus was determined and equalizer setting decision to determine the equalizer setting a gain at each frequency band in the equalizer processing (33) and a gain is, the reference gain determination unit (32) as a reference gain determines the gain processing unit for uniformly amplify or attenuate the entire input signal (41), and the depending on the equalizer setting to the equalizer setting determination unit (33) has been determined, the equalizer processor for each of a plurality of predetermined frequency band, the input signal the gain processing unit (41) is amplified or attenuated, amplified or attenuated (42 Or, according to the equalizer setting determined by the equalizer setting determination unit (33), an equalizer processing unit (42) for amplifying or attenuating the input signal for each of a plurality of predetermined frequency bands, and a gain, The equalizer processing unit (42) uniformly amplifies or attenuates the entire input signal amplified or attenuated so that the reference gain determined by the reference gain determination unit (32) is obtained. The gist is that the equalizer device includes a gain processing unit (41) .

In the equalizer device according to the first aspect of the present invention, the reference gain determination unit (32) calculates an average value of the trajectory acquired by the trajectory acquisition unit in the second axis direction as the reference gain. can do.

  Further, in the equalizer device according to the first aspect of the present invention, the trajectory acquisition unit (31) is configured to detect the trajectory detection unit (21) when the trajectory detection unit (21) detects a discontinuous trajectory. Based on the detected trajectory, a continuous trajectory can be calculated, and the continuous trajectory can be acquired as a trajectory detected by the trajectory detection unit.

The second aspect of the present invention detects a trajectory of an operation on a detection region having a signal input step for inputting an input signal, a first axis corresponding to a frequency, and a second axis corresponding to a gain increasing and decreasing from 0 dB. A trajectory acquired in the trajectory acquisition step based on a trajectory from the start point to the end point acquired in the trajectory acquisition step, and a trajectory acquisition step in which the trajectory detected in the trajectory detection step is acquired. Each frequency in the equalizer process based on a difference between a reference gain determining step for determining a reference gain in the second axis and a reference gain determined in the reference gain determining step and a trajectory acquired in the trajectory acquiring step Equalizer setting determination unit that determines the equalizer setting that is the gain in the band Tsu and a flop, determined gain, so that the reference gain determined in said reference gain determining step, gain processing step of uniformly amplify or attenuate the entire input signal, and, in the equalizer setting determination step depending on has been equalizer setting, for each of a plurality of predetermined frequency band, amplified or attenuated input signal in the gain processing step, amplifying or attenuating equalizer processing step, or, as determined in the equalizer setting determination step The equalizer processing step for amplifying or attenuating the input signal for each of a plurality of predetermined frequency bands according to the equalizer setting, and the equalizer so that the gain becomes the reference gain determined in the reference gain determination step. All input signals amplified or attenuated in the processing step And summarized in that a equalizer adjustment method comprising the gain processing step of uniformly amplify or attenuate.

  ADVANTAGE OF THE INVENTION According to this invention, the equalizer apparatus which can set and reflect an appropriate characteristic easily, and the adjustment method of an equalizer apparatus can be provided.

It is a typical block diagram explaining the fundamental structure of the equalizer apparatus which concerns on embodiment of this invention. It is a figure explaining the adjustment method of the equalizer apparatus which concerns on embodiment of this invention. It is a figure explaining the frequency characteristic of the output signal of the equalizer apparatus which concerns on embodiment of this invention. It is a figure explaining the adjustment method of a general equalizer apparatus. It is a figure explaining the frequency characteristic of the output signal of a general equalizer apparatus.

  Next, an embodiment of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the embodiment described below exemplifies an apparatus for embodying the technical idea of the present invention, a program and a method used in the apparatus, and the technical idea of the present invention is described below. It is not specific to the apparatus exemplified in the embodiment, the program or method used in the apparatus. The technical idea of the present invention can be variously modified within the technical scope described in the claims.

(Equalizer device)
As shown in FIG. 1, an equalizer device according to an embodiment of the present invention includes a signal input unit 1, a user interface unit 2, a control unit 3, a signal processing unit 4, a DA converter unit 5, and an amplifier unit 6. And an output unit 7. The signal input unit 1 inputs, for example, a digital audio signal as an input signal. First, the outline | summary of operation | movement of each part of an equalizer apparatus is demonstrated.

  The user interface unit 2 includes a trajectory detection unit 21 having a detection area where a user operation input is input, and a display unit 22 that displays characters, images, and the like. The user interface part 2 can be comprised from a display apparatus and a touch panel as an example in which the locus | trajectory detection part 21 and the display part 22 were integrally formed. The trajectory detection unit 21 detects an operation on the detection area by the user and detects an operation trajectory. The locus detection unit 21 may be configured by a pointing device such as a mouse, a touch pad, or a light pen. The display unit 22 includes a display device such as a liquid crystal display device, for example.

  The control unit 3 includes a trajectory acquisition unit 31, a reference gain determination unit 32, an equalizer setting determination unit 33, and a display processing unit 34. The control unit 3 controls driving of the user interface unit 2 and the signal processing unit 4. The trajectory acquisition unit 31 acquires a trajectory detected by the trajectory detection unit 21 of the user interface unit 2. The reference gain determination unit 32 calculates a reference gain S in the trajectory acquired by the trajectory acquisition unit 31 based on the trajectory acquired by the trajectory acquisition unit 31.

  The reference gain determination unit 32 calculates, for example, the average value in the vertical axis direction of the trajectory acquired by the trajectory acquisition unit 31 as the reference gain S. In addition, the reference gain determination unit 32 may calculate a median value or the like based on the vertical axis variance or standard deviation of the acquired trajectory as the reference gain S.

  The equalizer setting determination unit 33 becomes a gain of each frequency band in the input signal input by the signal input unit 1 based on the reference gain S calculated by the reference gain determination unit 32 and the locus detected by the locus detection unit 21. Determine the equalizer settings.

  In the present embodiment, the equalizer processing unit 42 performs an equalizer process using a plurality of peaking filters each having a plurality of different frequencies as center frequencies. In this embodiment, an equalizer process using 13 peaking filters is performed as an example. Therefore, the equalizer setting determination unit 33 determines an equalizer setting that is a gain of each center frequency in each peaking filter of the equalizer processing unit 42. In the present embodiment, each peaking filter is realized by digital processing, but can also be realized by analog processing.

  The display processing unit 34 performs processing to display characters, images, and the like on the display unit 22 of the user interface unit 2. For example, the display processing unit 34 presents the detection area of the trajectory detection unit 21 to the user by displaying a scale indicating the frequency on the horizontal axis and a scale indicating the gain on the vertical axis on the display unit 22. Thereby, the correspondence between each input position (coordinate) in the detection area and the frequency and the correspondence between each input position in the detection area and the gain can be presented to the user. The scale may not display kana sushi. The display processing unit 34 may display an operation trajectory detected by the trajectory detection unit 21 or display frequency characteristics of an input signal and an output signal.

  The signal processing unit 4 includes a gain processing unit 41 and an equalizer processing unit 42. The signal processing unit 4 includes a digital signal processor (DSP) and the like. In addition, the signal processing unit 4 may include an analog volume and an electronic volume.

  The gain processing unit 41 uniformly amplifies or attenuates the entire input signal input by the signal input unit 1 according to the reference gain determined by the reference gain determination unit 32. The equalizer processing unit 42 performs an equalizer process on the input signal input by the signal input unit 1 in accordance with the equalizer setting determined by the equalizer setting determination unit 33. That is, the equalizer processing unit 42 performs an equalizer process using a plurality of peaking filters each having a plurality of different frequencies as center frequencies.

The signal processing unit 4 amplifies or attenuates the input signal by the gain processing unit 41 and the equalizer processing unit 42, and outputs a digital audio signal that is a signal after the amplification or attenuation to the DA converter unit 5. The DA converter unit 5 converts the digital audio signal amplified or attenuated by the signal processing unit 4 into an analog audio signal and outputs the analog audio signal to the amplifier unit 6. The amplifier unit 6 amplifies the analog audio signal input from the DA converter unit 5 and outputs it to the output unit 7. The output unit 7 may be configured from an output device such as a speaker, or may be configured from an output terminal that outputs an analog audio signal.
If the output destination device is a device that can receive a digital signal, the digital signal output by the signal processing unit 4 may be directly output to the outside.

(Adjustment method)
2 to 5 are diagrams showing detection areas of the locus detection unit 21. FIG. 2 to 5 also include lines for explanation as appropriate.
For example, as illustrated in FIG. 2, when the user traces the detection area of the user interface unit 2 including a touch panel with a finger, the trajectory detection unit 21 detects the traced trajectory T (dashed line). For example, the trajectory detection unit 21 samples the coordinates (x, y) of the traced detection area every 100 ms, and detects the trajectory T by connecting the sampled coordinates in time series. The trajectory acquisition unit 31 acquires the trajectory T detected by the trajectory detection unit 21.

  Note that the X coordinate corresponds to the frequency, and the Y coordinate corresponds to the gain. Therefore, the gain at each frequency can be detected by detecting the coordinates. For example, the gain at each Y coordinate may be set with the maximum value and the minimum value in the vertical axis direction of the detection region of the locus detection unit 21 as the maximum increase value and the minimum value of the gain, respectively. Further, for example, the frequency at each X coordinate may be set with the maximum value and the minimum value in the horizontal axis direction of the detection region of the locus detection unit 21 as the maximum frequency and the minimum frequency, respectively.

  For example, as illustrated in FIG. 2, the reference gain determination unit 32 calculates an average value in the vertical axis direction from the start point to the end point of the trajectory T acquired by the trajectory acquisition unit 31 as the reference gain S in the trajectory T. That is, the reference gain determination unit 32 sets the average value of each Y coordinate sampled by the trajectory detection unit 21 as the reference gain S.

  Then, the reference gain determination unit 32 determines a reference gain S that is a gain for uniformly amplifying or attenuating the entire input signal input by the signal input unit 1 from the calculated reference gain S.

  The equalizer setting determination unit 33 uses the difference d in the vertical axis direction from the reference gain S to the trajectory T acquired by the trajectory acquisition unit 31 using the reference gain S determined by the reference gain determination unit 32 as a reference. The gain of each center frequency in each of the 42 peaking filters is determined.

  Each center frequency is, for example, the center of each band obtained by dividing the range from the maximum frequency to the minimum frequency for each octave.

  Each gain of the equalizer setting determined by the equalizer setting determination unit 33 can be determined by, for example, a difference d between the Y coordinate at each center frequency of the locus and the Y coordinate of the reference gain S. For example, it is assumed that the trajectory detection unit 21 has a resolution of 180 steps in the vertical axis direction of the detection region, and the Y coordinate can be set from 1 to 180, and the gain of the equalizer setting is stepped every 1 dB within a range of ± 9 dB. If it is set, the case where the difference between the Y coordinate values is 10 corresponds to 1 dB.

  When the difference d, which is a value obtained by subtracting the Y coordinate of the reference gain S from the Y coordinate of the trajectory T at the same frequency (X coordinate), is 21, the corresponding peaking filter gain is rounded off to +2 dB. . Similarly, when the difference d is -11, the gain is -1 dB. Note that rounding such as rounding to the gain is not necessarily performed.

  Further, the equalizer setting determination unit 33 may set an effect amount when determining the gain from the difference d, and may determine the gain according to the effect amount. For example, the equalizer setting determination unit 33 can set the effect amount step by step, 0.05 for small, 0.1 for medium, and 0.2 for large. When the difference d is 21 and the effect amount is small, the gain is 21 × 0.05 = 1.05, rounded off to 1 dB. Similarly, if the effect amount is medium, the gain is 21 × 0.1 = 2.1, and 2 dB. If the effect amount is large, 21 × 0.2 = 4.2 and 4 dB is obtained. . The effect amount is switched according to, for example, a switching operation by the user.

  The gain processing unit 41 uniformly amplifies or attenuates the entire input signal with the reference gain S determined by the reference gain determination unit 32, and the equalizer processing unit 42 applies the input signal amplified or attenuated by the reference gain determination unit 32 to the input signal. Thus, the equalizer processing is performed with the equalizer setting determined by the equalizer setting determination unit 33. That is, the equalizer processing unit 42 amplifies or attenuates each band of the input signal for each peaking filter with a gain determined by the equalizer setting.

  Note that the equalizer process may be first performed on the input signal, and then the entire input signal after the equalizer process may be uniformly amplified or attenuated by the gain processing unit 41.

  In the example illustrated in FIG. 2, the equalizer setting is −1 dB and the reference gain is +8 dB at 2.5 kHz from the trajectory T detected by the trajectory detection unit 21. In this case, the frequency characteristic C of the output signal is a curve close to the locus T as shown in FIG. 3, and does not pulsate greatly as shown in FIG.

  In the case of a conventional equalizer device that adjusts the gain for each predetermined frequency band, as shown in FIG. 4, the gain of each peaking filter is adjusted with the gain shown by each bar F with respect to the locus T traced by the user. Set. In the example shown in FIG. 4, the trajectory T has a gain setting of +7 dB only for 2.5 kHz and +8 dB for the others. As shown in FIG. 5, each gain set in this way has a frequency characteristic G. When the gain is reflected in the input signal, the frequency characteristic C of the output signal is such that each gain is between frequency bands. Boosting by interfering with each other, the trajectory T is greatly different.

  On the other hand, according to the equalizer device according to the embodiment of the present invention, the reference gain S is calculated for the value of the trajectory T in the vertical axis direction, and the equalizer setting is determined based on the reference gain S. Appropriate frequency characteristics can be set and reflected. Thereby, it can be set as the equalizer process which the user intended.

(Other embodiments)
While embodiments of the present invention have been described as described above, it should not be understood that the description and drawings that form part of this disclosure limit the present invention. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  For example, in the above-described embodiment, the trajectory acquisition unit 31 is configured to generate a continuous trajectory based on the discontinuous trajectory detected by the trajectory detection unit 21 when the trajectory detection unit 21 detects a discontinuous trajectory. And the calculated continuous trajectory may be acquired as the trajectory detected by the trajectory detection unit 21. The trajectory acquisition unit 31 can calculate a continuous trajectory using, for example, an interpolation method such as a least square method, Lagrange interpolation, or spline interpolation.

  In the above-described embodiment, the equalizer device can also be applied to an equalizer process other than the peaking filter.

  As described above, the present invention naturally includes various embodiments not described herein. Therefore, the technical scope of the present invention is defined only by the invention specifying matters according to the scope of claims reasonable from the above description.

DESCRIPTION OF SYMBOLS 1 Signal input part 2 User interface part 3 Control part 4 Signal processing part 5 DA converter part 6 Amplifier part 7 Output part 21 Trajectory detection part 22 Display part 31 Trajectory acquisition part 32 Reference gain determination part 33 Equalizer setting determination part 34 Display processing part 41 Gain processor 42 Equalizer processor

Claims (4)

A signal input unit for inputting an input signal;
A trajectory detection unit that detects a trajectory of an operation on a detection region having a first axis corresponding to a frequency and a second axis corresponding to a gain that increases and decreases from 0 dB ;
A trajectory acquisition unit for acquiring a trajectory detected by the trajectory detection unit;
A reference gain determination unit that determines a reference gain in the second axis of the trajectory acquired by the trajectory acquisition unit based on a trajectory from the start point to the end point acquired by the trajectory acquisition unit;
Based on a difference between the trajectory of the track acquiring unit and the reference gain the reference gain determination unit has determined that the acquired a equalizer setting determination unit that determines the equalizer setting a gain at each frequency band in the equalizer processing,
Gain, so that the reference gain the reference gain determination unit has determined, gain processing unit for uniformly amplify or attenuate the entire input signal, and, depending on the equalizer setting that the equalizer setting determination unit is determined, for each of a plurality of predetermined frequency band, the input signal the gain processing unit is amplified or attenuated, the equalizer processor to amplify or attenuate, or,
The equalizer processing unit that amplifies or attenuates the input signal for each of a plurality of predetermined frequency bands in accordance with the equalizer setting determined by the equalizer setting determination unit, and the reference gain determined by the reference gain determination unit The equalizer apparatus further includes a gain processing unit that uniformly amplifies or attenuates the entire input signal amplified or attenuated by the equalizer processing unit. The equalizer apparatus according to claim 1, wherein the reference gain determination unit calculates an average value of the trajectory acquired by the trajectory acquisition unit in the second axis direction as the reference gain.   The trajectory acquisition unit calculates a continuous trajectory based on the trajectory detected by the trajectory detection unit when the trajectory detection unit detects a discontinuous trajectory, and determines the continuous trajectory as the trajectory. The equalizer device according to claim 1, wherein the equalizer device is acquired as a locus detected by the detection unit. A signal input step for inputting an input signal;
A trajectory detection step of detecting a trajectory of an operation on a detection region having a first axis corresponding to a frequency and a second axis corresponding to a gain increasing and decreasing from 0 dB ;
A trajectory acquisition step for acquiring the trajectory detected in the trajectory detection step;
A reference gain determination step for determining a reference gain in the second axis of the trajectory acquired in the trajectory acquisition step based on the trajectory from the start point to the end point acquired in the trajectory acquisition step;
Including an equalizer setting determining step for determining an equalizer setting that is a gain in each frequency band in the equalizer process based on a difference between the reference gain determined in the reference gain determining step and the locus acquired in the locus acquiring step. ,
Gain, so that the reference gain determined in said reference gain determining step, gain processing step of uniformly amplify or attenuate the entire input signal, and, according to the equalizer settings determined in the equalizer setting determination step Te, for each of a plurality of predetermined frequency band, amplified or attenuated input signal in the gain processing step, amplifying or attenuating equalizer processing step, or,
In accordance with the equalizer setting determined in the equalizer setting determining step, an equalizer processing step for amplifying or attenuating the input signal for each of a plurality of predetermined frequency bands, and a gain are determined in the reference gain determining step. A method for adjusting an equalizer device, comprising: a gain processing step for uniformly amplifying or attenuating the entire input signal amplified or attenuated in the equalizer processing step so as to obtain a reference gain .

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