JP4166507B2 - Method and apparatus for setting acoustic characteristics - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in technology for setting acoustic characteristics of a graphic equalizer by drawing a desired equalizer curve on a touch panel screen.
[0002]
[Prior art]
Some acoustic devices such as a car audio system have a graphic equalizer (hereinafter also referred to as EQ) function. This graphic equalizer divides an input audio signal into several frequency bands, and controls the frequency characteristics by increasing or decreasing the level for each band with a volume (slider) switch. In such a graphic equalizer, the increase / decrease set for each frequency band is called boost / cut, and the boost / cut value is also called parameter value. A combination of parameter values is called an EQ characteristic.
[0003]
For each boost / cut value in such a graphic equalizer, instead of individually adjusting the actual volume slider switch for each frequency band, the volume slider switch for each frequency band and the slide groove that serves as the reference line for setting are graphically displayed. There has also been proposed a technique for collectively adjusting the boost / cut values of each band according to the drawn curve by tracing the touch panel covering the display screen with a finger or a pen (for example, Japanese Patent Laid-Open No. Hei 11- 112254). A curve drawn with a finger or a pen in this way corresponds to what is called an equalizer curve or an equalizing curve.
[0004]
In such a conventional technique, the value of each boost / cut is set based on the coordinates of the intersection of the locus traced with a finger or a pen and the slide groove.
[0005]
[Problems to be solved by the invention]
However, in the conventional technology as described above, when the traced peak or minimum value comes between the slide groove and the slide groove, the peak value or minimum value is not reflected, and is based on the intersection with the slide groove. In addition, there is a problem that an error occurs between the value set for each frequency band and the characteristic assumed by the user, that is, the equalizer curve.
[0006]
The present invention has been proposed in order to solve the above-described problems of the prior art. The purpose of the present invention is to set the acoustic characteristics of a graphic equalizer by drawing a curve on a touch panel. The error is minimized by determining the value of each boost / cut based on the height at which two nearby points are crossed.
[0007]
[Means for Solving the Problems]
To achieve the above object, the invention according to claim 1, in the setting method of the acoustic characteristics performed using the setting device of the acoustic characteristic having a control unit for setting the acoustic characteristics for each frequency band, wherein the control unit a step of graphic display unit to display the reference line for each of the plurality of bands, the acoustic characteristic curve drawn by contact from the outside surface of said display means, said position of either crosses any height of each reference line and a step of sensing the one by at least two points of each reference line near the sensor, calculating a slope of the line joining the points of each said two points, the slope of the straight line according to the reference line that are adjacent to each other If positive and negative same sign, steps and the slope is positive and negative different marks of the straight line according to the reference line adjacent to set the average value of each said two points as a boost cut values for each band In this case, the intersection position of each straight line is calculated, and the intersection position is set as a boost cut value for the band related to the one closer to the intersection position among the average values, and the average value is set for the other bands. And a step of setting as a boost / cut value.
[0008]
The invention of claim 2 captures the invention of claim 1 from the viewpoint of an apparatus, and in an acoustic characteristic setting device for setting acoustic characteristics for each frequency band, a plurality of reference lines for each band are displayed on the display means. A means for graphical display and a position at which the acoustic characteristic curve drawn by external contact on the surface of the display means crosses each reference line, and at least two points near each reference line And means for calculating the slope of the straight line connecting the two points, and if the slope of the straight line related to each adjacent reference line has the same sign, the average of the two points. When the slopes of the straight lines related to the reference lines adjacent to each other and the means for setting the value as the boost cut value of each band are different in sign, calculate the intersection position of each straight line, Set the intersecting point for the band of the closer to the point location as a boost cut values for the other band, characterized in that it comprises, means for setting the average value as a boost cut value.
[0014]
In these aspects, based on the direction in which the curve crosses each reference line, the value relating to each slide groove can be appropriately set by the combination of adjacent ones. For example, if you cross a reference line with a curve up to the right and then cross the reference line next to it to the right, there will be a peak between the two reference lines. Then, if the reference line adjacent to the right is crossed so as to rise to the right, it can be determined that there is a minimum value between the two reference lines, and these can be considered.
[0018]
Also, in these modes, whether the slope of the curve crossing the reference line is rising or falling is determined by the difference in sign, and if the inclinations of adjacent reference lines differ, the peak or minimum value between them is determined. Therefore, a value corresponding to the reference line whose average position of the two points is closer to the intersection position is set based on the intersection position. As a result, an error between the user's intention and the set content is minimized.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention (hereinafter referred to as “embodiments”) will be specifically described with reference to the accompanying drawings. Note that this embodiment can be realized by controlling a computer with a program. However, in this case, since the hardware and the implementation mode of the program can be variously changed, in the following description, each of the present invention and the present embodiment will be described. A virtual circuit block that realizes the function is used.
[0020]
[1. Constitution〕
This embodiment shows an acoustic characteristic setting device (hereinafter referred to as “this device”) for setting acoustic characteristics for each frequency band, and an acoustic characteristic setting method executed on this device. It can also be grasped as an acoustic characteristic setting program for realizing the method.
[0021]
Among these, this apparatus is provided with the following each component shown in the block diagram of FIG. First, the display unit 1 is a liquid crystal display panel, and the surface of the display unit 1 is a touch panel that senses the coordinates of a part touched with a finger or a pen. The drawing unit 2 is a part that creates data of display contents such as characters and graphic images on the display unit 1. The NAVI microcomputer unit 3 is an information processing microcomputer of the car navigation system, and switches between audio-related display such as a graphic equalizer and navigation-related display such as a map display as display contents on the display unit 1 through the drawing unit 2. Is also the part to do.
[0022]
The input unit 4 is input means including the touch panel and other operation keys. The EQ circuit 5 is a circuit that outputs an audio signal from the audio reproduction device 6 such as a CD or MD player to the speaker SP through acoustic characteristic processing such as emphasis or attenuation for each band by a graphic equalizer. The control unit 7 is a part that controls the NAVI microcomputer unit 3 and the EQ circuit 5 based on the input content from the input unit 4, and this control includes setting of acoustic characteristics of the graphic equalizer. This control part 7 is implement | achieved by controlling a computer to perform the means as each function mentioned later by a program.
[0023]
[2. Action)
The present embodiment configured as described above operates as follows. Here, the processing procedure in this embodiment is shown in the flowchart of FIG.
[2-1. Outline of action)
First, the acoustic characteristics of the graphic equalizer in the present embodiment are set as follows. That is, when the user performs a predetermined operation such as a button operation, an equalizer adjustment screen, that is, an acoustic characteristic setting screen is called on the display unit 1 such as a liquid crystal display panel (step 1). On this screen, a graphic display of the slide groove and slide bar, which is the axis that sets the value for each frequency band (band) of the graphic equalizer, that is, the reference line, and the surface shows the capacitance and electrical conductivity fluctuations, etc. The touch panel is based on the sensor used.
[0024]
On this screen, the user draws an equalizer curve by tracing the screen with a finger or a pen so as to cross each slide groove (step 2). Then, of the trajectory of the finger or pen, the position of the intersection with at least two points near each slide groove is picked up and stored (step 3), and the extracted position of each intersection for each slide bar is referred to. Thus, the boost / cut value of each frequency band is set as the equalizer characteristic (steps 4 to 6). In the present embodiment, the “position” and “intersection” regarding the equalizer curve drawn on the touch panel means a height position crossing each slide groove which is a reference line.
[0025]
In order to realize the setting of the acoustic characteristics as described above, the control unit 7 is realized by controlling the computer so as to fulfill the following means as functions. That is, basically, the control unit 7 graphically displays a plurality of reference lines for each of the bands, that is, slide grooves, on the display unit 1, and an acoustic characteristic curve drawn by external contact on the surface of the display unit 1, The position at which each slide groove is crossed is sensed by at least two points in the vicinity of each slide groove, and the value of each band is set based on the position of each two points.
[0026]
[2-2. Principle of boost / cut value setting)
The principle of boost / cut value setting (steps 4 to 6 in FIG. 2) as described above will be described with reference to FIG. First, as illustrated in this figure, two points in the vicinity of the intersection with each slide groove L1, L2, L3, L4, L5 from the trajectory of the finger or pen (indicated by a dashed curve) They are connected by straight lines f1, f2, f3, f4, f5 indicated by solid arrows. Next, for each straight line, the value of a indicating the slope of the straight line is calculated by applying the formula y = ax + b (step 4). Here, the right direction in FIG. 3 is the X value increasing direction, and the upper direction in FIG. 3 is the Y value increasing direction.
[0027]
Then, the control unit 7 calculates the inclination of the acoustic characteristic curve across the slide grooves based on the positions of the two points, and compares the values of the inclinations a of the slide grooves adjacent to each other. It is determined how to set the boost / cut value of each band according to the positive and negative combinations, and the value is stored in memory (step 5).
[0028]
Specifically, first, when the values of each of the two bands are both positive or negative, that is, with the same sign, the average value of the two points corresponding to the slide grooves of each band is calculated for each band. Set as boost cut value. For example, since both the straight lines f1 and f2 have a positive inclination a, the band values relating to the slide grooves L1 and L2 are B1 and B2, respectively.
[0029]
In addition, when the inclinations related to the slide grooves adjacent to each other have the same sign, the control unit 7 sets the corresponding band values based on the average positions of the two points related to the slide grooves. When the slopes related to the slide grooves adjacent to each other are different in sign, the intersection position of each slope is calculated, and the average value of the corresponding two points of the slide grooves is the one closer to the intersection position. A band value is set based on the intersection position.
[0030]
That is, the value of a in each slide groove adjacent to each other is compared, and when the value of a is positive on the left side and negative on the other side of the right side, the intersection of two straight lines is calculated, and then 2 near each slide groove. In comparison with the average value of the points, a value based on the intersection position is set for the band related to the larger value (see FIG. 3). For example, in the slide grooves L2 and L3, since the slope a of the straight line f2 is positive and the slope a of the straight line f3 is negative, the position of the intersection A1, that is, the Y value of the two straight lines f2 and f3 is obtained. Of the average values B2 and B3 of every two points, the value of L2, the Y value of which is closer to the intersection A1, that is, the larger one, is set based on the position of the intersection A1 that is slightly higher.
[0031]
In the slide grooves L4 and L5, since the slope a is negative for the left one straight line f4 and the slope a is positive for the other right f5, the position of the intersection A2 of the two straight lines f4 and f5, that is, the Y value is obtained. Of the average values B4 and B5 of two points in the vicinity of each slide groove L4, L5, the value of L4, whose Y value is closer to the intersection A2, that is, the smaller one, is based on the value of the intersection A2, which is slightly lower than that. Is set.
[0032]
Then, the memorized boost / cut value is displayed on a slide bar indicating each frequency band on the screen (step 6 in FIG. 2), and a series of acoustic characteristic setting processing is terminated. In addition, about the slide groove | channel of both ends, a value is set based on the average value of two neighboring points, or the intersection coordinate as usual.
[0033]
[2-3. Illustration〕
FIG. 4 shows an overall example of the boost / cut value setting as described above. The arrow in this figure represents a straight line connecting two points in the vicinity of the intersection with each slide groove in the trajectory of the finger or pen. In this example, as the setting value of the slide bar (1), the slope a of the straight line of the slide bar (4) is positive and the slope of the slide bar (1) is also positive. An average value is set.
[0034]
Also, regarding the set values of slide bar (3) and (5), it is determined that there is a curve peak between the straight line of slide bar (5) and the slope of slide bar (3) is negative. Then, the intersection point of the straight line of the slide bar (5) and the straight line of the slide bar (3) is calculated, and the Y value of the intersection point position is set as the value of the slide bar of (5) where the average position of the two neighboring points is high. At that time, an average value of two points is set for the other slide bar (3). Similarly, the slide bars {2} and {4} are set.
[0035]
[3. effect〕
As described above, in this embodiment, when the user draws an acoustic characteristic curve so as to cross a slide groove such as a slide groove displayed graphically, the value for each band is based on the intersection point between the locus and the slide groove. Rather than setting the value, a value for each band is set based on the position of each two points detected near the slide groove. That is, if two slide coordinates are used for each slide groove and the tilt directions are compared between adjacent slide grooves, it can be determined even if there are peaks or minimum values between the slide grooves. By setting a value that reflects this, an error from the user's intention is minimized.
[0036]
Moreover, in this embodiment, the value which concerns on each slide groove | channel can be appropriately set with the combination of adjacent things based on the direction where a curve crosses each slide groove | channel. For example, if you cross a slide groove with a curve to the right shoulder and then cross the right next slide groove to the right shoulder, there will be a peak between the two slide grooves, and conversely, the slide groove with a curve will move to the right shoulder. Then, if the slide groove adjacent to the right is crossed so as to rise to the right, it can be determined that there is a minimum value between the two slide grooves, and these can be taken into consideration.
[0037]
Also, in this embodiment, whether the inclination of the curve crossing the slide groove is right-side up or right-side down is determined by the difference in sign, and when adjacent slide grooves have different inclinations, the peak or minimum value between them is determined. Therefore, a value corresponding to the slide groove whose average position of the two points is closer to the intersection position is set based on the intersection position. As a result, an error between the user's intention and the set content is minimized.
[0038]
[4. Other embodiments]
In addition, this invention is not limited to the said embodiment, Other embodiments which are illustrated below are included. For example, the configuration diagram of FIG. 1 is an example, and the present invention can also be applied to acoustic characteristics of home audio systems, personal computers, electronic musical instruments, etc. that are unrelated to car navigation. Needless to say, the design of the setting screen, the number of frequency bands, and the like can be changed as appropriate.
[0039]
【The invention's effect】
As described above, according to the present invention, in the acoustic equalizer setting of the graphic equalizer by drawing a curve on the touch panel, each curve is based on the position at which the curve crosses two points near each reference line. By determining the boost / cut value, the error is minimized.
[Brief description of the drawings]
FIG. 1 is a functional block diagram showing a configuration of an embodiment of the present invention.
FIG. 2 is a flowchart showing a processing procedure in the embodiment of the present invention.
FIG. 3 is a conceptual diagram showing the principle of boost / cut value setting in the embodiment of the present invention.
FIG. 4 is a diagram showing an example of acoustic characteristic setting in the embodiment of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Display part 2 ... Drawing part 3 ... NAVI microcomputer part 4 ... Input part 5 ... EQ circuit 6 ... Audio reproduction apparatus 7 ... Control part 7
STEP ... Procedure steps

Claims (2)

In the acoustic characteristic setting method performed using the acoustic characteristic setting device having a control unit for setting the acoustic characteristics for each frequency band,
The controller is
Displaying a plurality of reference lines for each of the bands on a display means ;
Sensing the position at which the acoustic characteristic curve drawn by external contact on the surface of the display means crosses each reference line, at least two points near each reference line by a sensor ; and
Calculating a slope of a straight line connecting the two points ;
When the slope of the straight line related to each reference line adjacent to each other has the same sign, the step of setting the average value of the two points as a boost cut value of each band ;
When the slopes of the straight lines related to the adjacent reference lines are different in sign, the intersection position of each straight line is calculated, and the intersection position of the band closer to the intersection position of the average value is boosted. A method for setting acoustic characteristics, comprising: setting as a cut value and setting the average value as a boost cut value for other bands. In the acoustic characteristic setting device that sets the acoustic characteristic for each frequency band,
Means for graphically displaying a plurality of reference lines for each band on a display means;
Means for sensing at a height at which the acoustic characteristic curve drawn by external contact on the surface of the display means crosses each reference line, at least two points near each reference line by a sensor;
Means for calculating a slope of a straight line connecting the two points;
When the slope of the straight line related to each reference line adjacent to each other has the same sign, the means for setting the average value of the two points as a boost cut value of each band;
When the slopes of the straight lines related to the adjacent reference lines are different in sign, the intersection position of each straight line is calculated, and the intersection position of the band closer to the intersection position of the average value is boosted. An apparatus for setting acoustic characteristics, comprising: means for setting as a cut value and setting the average value as a boost cut value for other bands.

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