JP3255509B2 - Graphic equalizer device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a graphic system for adjusting a frequency response in an audio spectrum.
The present invention relates to an equalizer device.

[0002]

2. Description of the Related Art FIG. 9 shows the appearance of an operation unit of a conventional graphic equalizer. Reference numeral 91 denotes a knob for adjusting each level corresponding to the audio spectrum. The knobs 91 can adjust the levels of peaking filters arranged at regular intervals for each octave band.

As described above, the level of each octave band can be adjusted by raising and lowering the knob corresponding to the octave band in the conventional graphic equalizer.

[0004]

However, in the above-mentioned conventional graphic equalizer device, there is a problem that the center frequency of the peaking filter corresponding to the knob is finely adjusted because the center frequency is equal. .

An object of the present invention is to solve such a conventional problem and to provide an excellent graphic equalizer device capable of finely adjusting a center frequency.

[0006]

To achieve the above object, according to the Invention The first configuration of the present invention, Chi lifting the <br/> equally spaced center frequencies for each of a plurality of octave bands, cascaded peaking filter When the frequency selection means for selecting a center frequency of each peaking filter, a gain setting means for setting a gain of the peaking filter with the center frequency selected by the frequency selection means, first switching the function of said frequency selection means Switching means, and the first switching means
When the stage is in the selected state, the adjacent frequency is selected by the frequency selecting means.
If selected, the gain of the selected peaking filter is
In value is set to a predetermined value,
The gain value of the peaking filter
And control means for setting the same as the gain of the filter .

In a second configuration of the present invention, a four-way switch and a jog shuttle dial are provided as frequency setting means and gain setting means, and a second function for switching these functions is provided.
When the center frequency of the peaking filter selected by the four-way switch changes, and when the center frequency of the peaking filter selected by the jog shuttle dial is changed by the operation of the second switching unit. It is designed to be able to switch between the case and the case of change.

Further, a third configuration of the present invention is provided with display means capable of graphically displaying the control contents of the control means.

[0009]

Therefore, according to the first configuration of the present invention, the center frequency of the selected peaking filter can be finely adjusted by switching the first switching means and operating the frequency selection means.

According to the second structure of the present invention, the second structure
The switching means can be switched between a case where the center frequency of the peaking filter selected by the four-way switch changes and a case where the center frequency of the peaking filter selected by the jog shuttle dial changes. Therefore, the center frequency can be finely adjusted, and an adjustment method according to the user's preference can be adopted.

Further, according to the third configuration of the present invention, the control contents of the control means can be graphically displayed on the display means, so that the control contents can be visually confirmed.

[0012]

(Embodiment 1) FIG. 1 shows the structure of a first embodiment of the present invention. In FIG. 1, reference numeral 1 denotes an input terminal, which is connected to the AD converter 2. The digital output of the AD converter 2 is a DSP (digital signal processor) 4 having a configuration in which peaking filters 3 are cascaded.
, And the output of the DSP 4 is connected to an output terminal 6 via a DA converter 5. The center frequency of each peaking filter 3 is set to 1/3 octave interval in the initial state. Reference numeral 7 denotes a control circuit using a microprocessor as control means, which receives control information of a cursor switch 8 which is a four-way switch also serving as a frequency selection means and a gain setting means, and a function switch 9 which is a first switching means. The coefficient of the peaking filter 3 is set in the DSP 4, and the setting state of the DSP 4 based on the control information is displayed on the liquid crystal display 10 as a display unit.

FIG. 2 shows a display section of the liquid crystal display 10. Numeral 11 denotes a cursor display, which indicates the position of the peaking filter selected by the cursor switch 8 among the first to Nth peaking filters 3 of the DSP 4. indicate. Reference numeral 12 denotes a knob display, which is provided corresponding to the first to N-th peaking filters 3 and moves up and down to display gain increase and decrease, respectively.

Next, the operation of the first embodiment will be described. First, when the function switch 9 is not pressed, the LEFT and RIGH of the cursor switch 8 are set.
When T is pressed, the control circuit 7 selects the m-th peaking filter 3. In this state, when the LEFT of the cursor switch 8 is further pressed, the (m-1) -th peaking filter is selected, and the RIG of the cursor switch 8 is selected.
If HT is pressed, the (m + 1) th peaking filter is selected. When the UP of the cursor switch 8 is pressed while the m-th peaking filter is selected, the gain of the m-th peaking filter increases, and when the DOWN of the cursor switch 8 is pressed, the gain of the m-th peaking filter decreases. I do. Such a selected state of the peaking filter 3 is determined by the drawing function of the control circuit 7.
As shown in FIG. 2, a selected peaking filter is displayed on the graphic of the liquid crystal display 10 by a cursor display 11.
The gain is indicated by the vertical position of the knob display 12.

Next, the operation when the function switch 9 is pressed will be described. First, with the function switch 9 being pressed, the cursor switch 8
Is pressed, the knob display 12 shifts to the right while holding the gain G0 (m), and is selected by the control circuit 7, as shown in FIGS. 3 (a) and 3 (b). Data of a frequency obtained by adding 1/6 octave to the center frequency of the m-th peaking filter 3 is provided. Further, when the RIGHT of the cursor switch 8 is pressed, as shown in FIG.
The m-th knob display 12 returns to the position corresponding to the center frequency of the initial value, and the gain G1 (m) of the m-th peaking filter 3 becomes G1 (m) = 0. And m +
The first peaking filter 3 is selected, and the knob display 12 is set at the position of the gain G0 (m) before the RIGHT of the cursor switch 8 is pressed with respect to the gain G1 (m + 1) of the (m + 1) th peaking filter. On the other hand, the m of the peaking filter 3 selected by the control circuit 7 is given the center frequency and the gain 0 in the initial state.
(M) is given.

On the other hand, if the LEFT of the cursor switch 8 is pressed while the function switch 9 is being pressed, the operation is the reverse of the case where the RIGHT of the cursor switch 8 is pressed. That is, as shown in FIGS. 4A and 4B, the knob display 12 displayed at the position corresponding to the gain G0 (m) is the position of the gain 0 (G1
(M) = 0), the left knob display 12 is set to the gain G0 (m), displayed in a state shifted to the right, and selected by the control circuit 7.
The third peaking filter 3 is given a gain of 0,
The (m-1) -th peaking filter 3 is provided with data of a frequency obtained by adding 1/6 octave to the center frequency to the frequency in the initial state, and the gain G0 (m) is set. Further, when the LEFT of the cursor switch 8 is pressed, as shown in FIG. 4C, the (m-1) -th knob display 12 returns to a state shifted leftward to a position corresponding to the center frequency of the initial value. The (m-1) -th peaking filter 3 selected by the control circuit 7 is given the center frequency and the gain G0 (m) in the initial state.

As described above, according to the first embodiment,
Peaking filters 3 cascaded with a plurality of octave bands at equal intervals of center frequency, a cursor switch 8 for setting the center frequency of each peaking filter 3 and its gain, and a switching switch for switching the function of the cursor switch 8 9, the control circuit 7 selects each peaking filter by operating the cursor switch 8, and if the cursor switch 8 is operated while the changeover switch 9 is pressed, the control circuit 7 selects each peaking. Since the center frequency of the filter is changed, the center frequency can be finely adjusted.

Further, a liquid crystal display 10 capable of graphic display is used as a display means of the graphic equalizer.
Since the knob display 12 in which the knob of the conventional graphic equalizer is made into a graphic is displayed, a setting display similar to the operation feeling of the conventional graphic equalizer can be obtained.

(Embodiment 2) FIG. 5 shows the appearance of a jog shuttle dial used in a second embodiment of the present invention. The configuration of the entire device is the same as that of the first device shown in FIG.
The jog shuttle dial 21 is used in place of the cursor switch 8 in the embodiment of FIG.
It is configured to be connected to

Next, the operation of the second embodiment will be described. When the jog dial 22 is turned clockwise on the jog shuttle dial 21, the same operation information as the RIGHT of the cursor switch 8 is given to the control circuit 7, and when the jog dial 22 is turned counterclockwise, the cursor switch 8 The same operation information as that of the LEFT is supplied to the control circuit 7. Regarding the shuttle dial 23, the same operation information as the UP of the cursor switch 8 is given to the control circuit 7 for the right rotation operation, and the same operation information as the DOWN of the cursor switch 8 is given to the control circuit 6 for the left rotation operation. Other operations are the same as those in the first embodiment.

As described above, according to the second embodiment,
Since the so-called jog shuttle dial is used as the frequency setting means and the gain setting means of the graphic equalizer of the first embodiment, the center frequency can be finely adjusted with a sense of rotation.

In this embodiment, the jog dial 2 is used.
2 is assigned to the LEFT and RIGHT of the cursor switch 8, and the shuttle dial 23 is assigned to the UP and DOWN of the cursor switch 8, but the reverse assignment, ie, the jog dial 22
May be assigned to UP and DOWN of the cursor switch, and the shuttle dial 23 may be assigned to LEFT and RIGHT of the cursor switch 8. In this case, the same effect can be obtained.

(Embodiment 3) FIG. 6 shows the configuration of a third embodiment of the present invention. The overall configuration of the apparatus in this embodiment is different from the configuration of FIG. 1 in that a changeover switch 31 serving as a second switching means and a jog shuttle dial 32 serving also as a second frequency selection means and a gain setting means are additionally connected to the control circuit 7. It has become. The operation of the changeover switch 31 changes the state of the control circuit 7 to N.
An ORMAL state and an EXTEND state can be set. It is set so that the operation of the cursor switch 8 is valid in the NORMAL state, and the operation of the jog shuttle dial 32 is valid in the EXTEND state.

In this embodiment, operation information is allocated as shown in FIG. 7 according to the state of the control circuit 7. That is, when the NORMAL state is set by the changeover switch 31, the UP, DOWN,
The operation of the LEFT and RIGHT is directly provided to the control circuit 7 as operation information. When the EXTEND state is selected by the changeover switch 31, the right rotation of the jog dial 33 of the jog shuttle dial 32 is increased by UP.
Information, left rotation is DOWN information, shuttle dial 34
Is given to the control circuit 7 as LEFT information, and left rotation is given as RIGHT information.

As described above, according to the third embodiment,
Cursor switches 8 as frequency setting means and gain setting means of the graphic equalizer of the first embodiment.
And a jog shuttle dial 32. The changeover switch 31 changes the center frequency of each peaking filter 3 selected by the cursor switch 8, and the change of the peaking filter 3 selected by the jog shuttle dial 32. Can be switched between the case where the center frequency changes and the case where the center frequency changes, so that the center frequency can be finely adjusted and an adjustment method according to the preference of the user can be adopted.

The assignment of FIG. 7 may be divided by the changeover switch 31 as shown in FIG. In this case, the setting can be performed using not only the cursor switch 8 but also the jog shuttle dial 32 according to the use state, so that the setting is simplified.

The present invention can adopt the following configuration in addition to the above embodiment. (1) A sound effect device in which the graphic equalizer of the above embodiment is combined with a compressor / limiter. (2) A sound effect device in which the graphic equalizer of the above embodiment is combined with a notch filter. (3) The graphic equalizer of the above embodiment has a stereo configuration. (4) The graphic equalizer of the above embodiment has a stereo configuration, and the L channel and the R channel are linked. (5) An acoustic effect device using a fluorescent display tube as the display means of the above embodiment. (6) A sound effect device using a CRT as the display means of the above embodiment. (7) In the above embodiment, a communication interface is added between the peaking filter 3 and the control circuit 7 to enable remote control. (8) The operation information of the cursor switch 8 of the above embodiment is
This is provided by a pointing device such as a mouse or trackball. (9) The graphic equalizer of the above embodiment is obtained by adding communication control means to each control circuit 7 so that they can be operated mutually.

[0028]

The present invention exhibits, as apparent from the above examples, the equidistant of the center frequency <br/> lifting Chi for each of a plurality of octave bands, the peaking filter connected in cascade, the center of each peaking filter a frequency selection means for selecting a frequency, a gain setting means for setting a gain of the peaking filter with the center frequency selected by the frequency selection means, a first switching means for switching the function of said frequency selection means, the first When the switching means 1 is selected,
If an adjacent frequency is selected by the frequency selection means,
The gain value of the peaking filter that was
Set the gain of the peaking filter for the adjacent frequency
The value is the same as the gain of the selected peaking filter
And the control means for setting the center frequency can be finely adjusted.

According to the present invention, a four-way switch and a jog shuttle dial are provided as frequency setting means and gain setting means, and second switching means for switching these functions is provided. By changing the operation, the center frequency of the peaking filter selected by the four-way switch changes and the center frequency of the peaking filter selected by the jog shuttle dial changes. This has the effect that the frequency can be finely adjusted and an adjustment method according to the user's preference can be adopted.

Further, according to the present invention, the control contents of the control means are graphically displayed on the display means, so that the control contents can be visually confirmed.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of a first embodiment of the present invention.

FIG. 2 is a front view of a display unit according to the first embodiment.

FIG. 3 is a schematic diagram showing an operation example of a display unit in the first embodiment.

FIG. 4 is a schematic diagram illustrating an operation example of a display unit according to the first embodiment.

FIG. 5 is a front view of a jog shuttle dial according to a second embodiment of the present invention.

FIG. 6 is a schematic block diagram of a third embodiment of the present invention.

FIG. 7 is a list showing an example of function assignment of operation switches according to a third embodiment.

FIG. 8 is a list showing an example of function assignment of operation switches according to a third embodiment.

FIG. 9 is a front view of an operation unit of a conventional graphic equalizer device.

[Explanation of symbols]

Reference Signs List 1 input terminal 2 AD converter 3 peaking filter 4 DSP 5 DA converter 6 output terminal 7 control circuit 8 cursor switch (frequency selecting means, gain setting means) 9 function switch (first switching means) 10 liquid crystal display 11 cursor display 12 Knob display 21 Jog shuttle dial 22 Jog dial 23 Shuttle dial 31 Changeover switch (second switching means) 32 Jog shuttle dial 33 Jog dial 34 Shuttle dial

────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yasuko Kitahara 4-1-1 Tsunashima Higashi, Kohoku-ku, Yokohama-shi, Kanagawa Prefecture Inside Matsushita Communication Industrial Co., Ltd. (56) References JP-A-2-301306 (JP, A) JP-A-4-322524 (JP, A) JP-A-61-126812 (JP, A) JP-A-7-30348 (JP, A) JP-A-6-338742 (JP, A) JP-A-3 JP-A-278604 (JP, A) JP-A-61-167212 (JP, A) JP-A-7-106878 (JP, A) JP-A-62-8719 (JP, U) (58) Fields investigated (Int. . ⁷ , DB name) H03G 1/00

Claims (5)

(57) [Claims] 1. A Chi lifting equidistant of the center frequency for each of a plurality of octave bands, the peaking filter connected in cascade, a frequency selection means for selecting a center frequency of each peaking filter was selected by the frequency selection means and gain setting means for setting a gain of the peaking filter with the center frequency, a first switching means for switching the function of said frequency selection means, the selection of the first switching means
In the state, the adjacent frequency is selected by the frequency selecting means.
The gain value of the selected peaking filter
Set to a predetermined value, the peaking filter of the adjacent frequency
The gain value of the peaking filter
A graphic equalizer device comprising: a control unit for setting the same as that of the graphic equalizer. 2. A graphic processor according to claim 1, wherein a four-way switch is used as the frequency setting means and the gain setting means.
Equalizer device. 3. The graphic equalizer according to claim 1, wherein a jog shuttle dial is used as the frequency setting means and the gain setting means. 4. A four-way switch and a jog shuttle dial are provided as frequency setting means and gain setting means, and second switching means for switching these functions is provided. The four-way switch is operated by operating the second switching means. 2. The graphic equalizer device according to claim 1, wherein a change can be made between a case where the center frequency of the peaking filter selected by the jog shuttle dial changes and a case where the center frequency of the peaking filter selected by the jog shuttle dial changes. . 5. The graphic equalizer device according to claim 1, further comprising display means capable of graphically displaying the control content of the control means.