JP3291360B2 - 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 an improvement in a signal level display method in an equalizer device.

[0002]

2. Description of the Related Art As one method of displaying a signal level in an equalizer device used for an audio device, each band component signal is separated from an audio signal by a plurality of band filters, and the level of each band component signal is detected as needed. There is a spectrum display for displaying the signal level of each band component signal based on the level.

FIG. 6 is a block diagram of a configuration example of an equalizer device for performing a conventional spectrum analyzer display, wherein 1 is an equalizer section (EQ section), 2 is a bandpass filter section, 63 is a control section,
Reference numeral 64 denotes a display unit. The input signal passes through the equalizer section 1 and is separated into a predetermined frequency band (described later (see FIG. 8)) by the band filter section 2, and the control section 63 detects a signal level for each frequency band (described later (FIG. 7)). And FIG. 9), and are displayed in accordance with the display divisions of the display unit 64 (described later (see FIG. 8)).

FIG. 7 is a schematic explanatory diagram of the band filter section 2 and the control section 63 of FIG. The bandpass filter unit 5 extracts (separates) the signal from the equalizer unit 1 for each predetermined frequency band (BPFs) 5-1, 5-1,.
, 5-n and each frequency band (for example, center frequency 125
Hz, 250 Hz,..., 16 KHz) A / D converters 6-1, 6-2,.
.., 6-n.

The control unit 63 includes a signal level detecting means 7 for detecting a signal level of each digitized frequency band component.
, 7-2,..., 7-3, and signal level divisions on the display unit 64 in order to display the signal level of each frequency band component obtained by the control unit on the display unit 64 as a spectrum display. 9) and a display segment corresponding to the frequency band division is specified to activate a corresponding light-emitting element (refers to a light-emitting member such as an element or a lamp that emits light when excited electrically, the same applies hereinafter). Display segment lighting means (FIG. 5)
(B)) and control means for controlling the equalizer 1 based on the detected signal level.

FIG. 8 shows a display segment group 81 arranged two-dimensionally on the display unit 64 and examples 82 and 83 of display segments (headings). Each display segment of the display segment group 81 has a rectangular shape. , The long sides are aligned in the horizontal direction, and the short sides are aligned in the vertical direction. Each of the frequency bands has a horizontal display section 82 (“Grid1” to “Grid1”).
9 "), and a vertical display section 83 (" Segment1 "to" Segment ") for each display level section.
13 "). The display segment is provided for the light emitting element itself or corresponding to the light emitting element, and is turned on when the light emitting element is activated.

The lower part of FIG. 8 shows a frequency band (unit: Hz) 84.
Is described in an explanatory manner. FIG. 9 shows an example of the segment “Segment” of the signal level, for example, “Seg1”.
“202 <AD” means “Segme” in FIG. 8 when the signal level of the output signal from the A / D converter is 202 or more.
It means that the part of "nt1" is turned on.

As described above, in the conventional spectrum display method, the frequency band is displayed in rows on the display unit as shown in FIG. 8 and the signal level is displayed in columns, and the audio signal passing through each band filter is displayed. A / D signal
The range of the conversion result is assigned to the display segments arranged on the display unit, and the display segments corresponding to the range are lit up and down, so that the user can visually increase or decrease the signal level for each frequency band. Grasp and recognize.

[0009]

However, in the conventional spectrum display, since one segment is a rectangle (rectangle) that is long in width and short in length, if there is an input signal with a low signal level as a whole, the display unit is not displayed. There is a problem that only the lower display segment (for example, “Segment 13”) is turned on, and it is difficult to recognize the signal level.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an equalizer device capable of performing a spreader display which makes it easy to recognize an increase or decrease in a signal level even when a signal having a low signal level is entirely detected when the equalizer device performs a spectrum display. And

[0011]

Means for Solving the Problems] equalizer apparatus of the present invention to achieve the above object, a band dividing means for obtaining a plurality of band component signals by dividing the audio signal into a plurality of frequency band components, each Signal level detecting means for detecting the signal level of the band component, and a plurality of rectangular display segments for displaying the signal level are aligned in a first direction and a second direction intersecting the first direction. and two-dimensionally arranged with a display unit, based on the signal level detected for each of the frequency bands, and a display control unit that controls lighting of the display segment, the vertical of each display segment of the display unit
In different equalizer device length of the horizontal, the second direction of the array of each frequency of said display segments causes to correspond to the first direction of the array of contact Keru each display segment on the display unit <br/> the signal level a first mode in correspondence with the band, to the corresponding sequence in the second direction of the display segment signal level causes to correspond to the sequence of a first direction in our Keru each display segment on the display unit to each frequency band And a display mode switching means for switching between the second mode and the second mode.

[0012]

[0013]

With the above arrangement, the equalizer device of the first invention in the first mode allows the arrangement of the display segments of the display section in the first direction to correspond to the signal level and the arrangement of the display segments in the second direction. The display segment specified at a position corresponding to the signal level and the frequency band of the display unit is lit based on the signal level detected for each frequency band by the display segment lighting means in correspondence with each frequency band.

[0014]

[0015]

FIG. 1 is a block diagram showing an embodiment of an equalizer device which realizes a spectrum display method according to the present invention. FIG.
1 is an equalizer section (EQ section), 2 is a band filter section, 3 is a control section, 4 is a display section, 9 is a display mode changeover switch, and the configuration of the equalizer section (EQ section) 1 and the band filter section 2 The operation is the same as that shown in FIG.

The input signal passes through the equalizer 1 and is separated (extracted) by the band filter unit 2 for each predetermined frequency band.
The signal level is detected for each frequency band by the control unit 3 (see FIGS. 4, 5A and 5B) and displayed according to the display divisions of the display unit 4 (see FIG. 3 described later). ).

The control unit 3 has a CPU, a ROM, an input / output interface, and signal level detecting means for detecting a signal level of each digitized frequency band component as shown in FIG. In order to display the signal level of each frequency band component obtained by the control unit 3 on the spectrum display unit 4, a signal level division (FIG. 3) on the display unit 4 and a display segment corresponding to the frequency band division are specified. The display segment lighting means (FIGS. 5A and 5B) for activating the light emitting element (described above) and lighting the display segment is stored in the ROM as a program, and further, based on the detected signal level. It controls the equalizer unit 1. In the embodiment, the display segment lighting means is realized by a program, but is not limited to this, and may be realized as an electric circuit.

FIG. 2 shows an example of a display unit. A display segment group 21 (81) in which rectangular display segments similar to those conventionally used (see FIG. 8) are two-dimensionally arranged and the display divisions thereof. Examples 22 and 23 of (heading) are shown. In each display segment of the display segment group 21, the long side is aligned in the horizontal direction and the short side is aligned in the vertical direction, and the display in the horizontal direction is performed for each signal level. Category 22 ("Grid1"-
"Grid9") and the vertical display sections 23 ("Segment3" to "Se
gment 11 ″). The display segment is provided either as the light emitting element itself or in correspondence with the light emitting element as described above, and is turned on when the light emitting element is activated.

In the embodiment, the vertical display section 2 is used.
3 as “Segment3” to “Segment1”
The reason why “1” is used is that the display unit 4 is in use when the mode is switched by a display mode switch 9 to be described later, and “Segment1” to “Segment9” unless the visual balance is taken into consideration. "May be made to correspond, or" Segment 5 "to" Segmen. "
You may make t13 "correspond.

As described above, according to the spectrum display method of the present invention, the display unit 4 is configured so that the signal levels are arranged in rows and the frequency bands are indicated in columns as shown in FIG. A / D audio signal
After the conversion, the range of the conversion result is assigned to the display segments arranged on the display unit 2, and the display segments corresponding to the range are lit in the left and right directions, so that the user can increase or decrease the signal level for each frequency band. Visually grasp and recognize.

The display mode changeover switch 9 is an option (additional mechanism), and displays the spectrum analyzer on the display unit 4 in the above-described method (first mode) and the conventional spectrum analyzer (second mode) (FIGS. 6 to 9). Mode).
In the configuration in which the display mode changeover switch 9 is provided, in the first mode (described later), the horizontal display section 2 is provided for each signal level.
2 (“Grid1” to “Grid9”), and a vertical display section 23 (“Seg
ment1 "to" Segment13 "),
By illuminating the corresponding display segment in the left-right direction, the user can visually grasp and recognize the increase / decrease of the signal level for each frequency band. Further, in the second mode, the horizontal display sections 22 (“Grid1” to “Grid1”) are provided for each frequency band.
"Grid9"), and the vertical display segments 23 ("Segment1" to "Se
gment 13 "), and the corresponding display segment is illuminated in the vertical direction to allow the user to visually grasp and recognize the increase or decrease of the signal level for each frequency band.

FIG. 3 is an example of the signal level division "Grid" in the first mode, and the signal level division (range) is shown below. For example, “80 <AD” of “Grid1” means that when the signal level of the output signal from the A / D converter is 80 or more, the “Grid1” portion in FIG. 2 is turned on.

FIG. 4 is a flowchart showing the operation of the display segment lighting means of the control unit 3. Hereinafter, the operation of the display segment lighting means will be described based on the flowchart of FIG.

[S1] The display mode changeover switch 9 is set to O
N is determined. If it is not ON, the current state is continued and the waiting state is repeated until the display mode switch 9 is turned ON. [S2] When the display mode switch 9 is ON, it is determined whether or not the mode has been switched to mode 1. [S3] When the mode is switched to the mode 1, the display process of the mode 1 is executed, and after the end, the process returns to the step S1. [S4] Mode 2 when not switched to mode 1
Is performed, and the process returns to S1 after the end.

FIG. 5A is an example of a flow chart of the display processing in mode 1 by the first display segment lighting means, and FIG. 5B is an example of a flow chart of the display processing in mode 2 by the second display segment lighting means. It is.

In the display processing of mode 1, the display of the signal level is performed according to the display level division AD (see the lower part of FIG. 3) of FIG. 3 (although AD = 33 and later are omitted in FIG. 5A for convenience of illustration). Repeating from AD = 13 to 80, the display segment at the position determined by the “Grid” column corresponding to the range of the signal level division and the “Segment” column corresponding to the frequency band is turned on (by activating the light emitting element). . When AD ≦ 13, all display segments are turned off.

In the display processing in mode 2, the display of the signal level is performed according to the display level division AD in FIG. 3 (although AD = 26 and later are omitted in FIG. 5A for convenience of illustration).
= 13 to 80, and the display segment at the position determined by the “Segment” column corresponding to the range of the signal level division and the “Grid” column corresponding to the frequency band is turned on (by activating the light emitting element). Note that AD ≦ 1
In the case of 3, all display segments are turned off.

As described above, in the first mode, the first display segment lighting means determines the display determined at the position corresponding to the horizontal display section indicating the signal level range and the vertical display section indicating the frequency band. Turn on the segment. In the second mode, the second display segment lighting means lights a display segment determined at a position corresponding to a horizontal display section indicating a frequency band and a vertical display section indicating a signal level range. If the display mode changeover switch is not provided, the display segment lighting means is equivalent to the first display segment lighting means.
Further, in the embodiment, the first direction is the horizontal direction and the second direction is the vertical direction, but the first direction may be the vertical direction and the second direction may be the horizontal direction.

[0029]

As described above, according to the present invention, the lighting width is longer than the vertical width even for a signal having a low level as a whole, even if the display segment is a rectangle that is long and short in length. Therefore, the recognizability of the increase or decrease of the signal level is improved.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment of an equalizer device that realizes a spectrum display method according to the present invention.

FIG. 2 is an example of a display segment group in which rectangular display segments are two-dimensionally arranged and display segments thereof.

FIG. 3 is an example of signal level division in a first mode.

FIG. 4 is a flowchart showing the operation of the display segment lighting means.

FIG. 5 shows a mode 1 by a first display segment lighting means.
6 is a flowchart showing the operation of the display processing of FIG. 5 and the display processing of mode 2 by the second display segment lighting means.

FIG. 6 is a block diagram illustrating a configuration example of an equalizer apparatus that performs a conventional spectrum analyzer display.

FIG. 7 is a schematic explanatory diagram of a bandpass filter unit and a control unit of FIG. 6;

8 is an example of a display segment group and two-dimensionally arranged display segments on the display unit in FIG. 6;

FIG. 9 is an example of signal level division.

[Explanation of symbols]

2 band filter unit (band dividing unit) 3 control unit (signal level detecting unit, display segment lighting unit) 4 display unit 9 display mode switch

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H03G 1/00 H03G 5/02 H04R 3/04 H04S 7/00

Claims (1)

(57) [Claims] 1. Band division means for dividing an audio signal into a plurality of frequency band components to obtain a plurality of band component signals; signal level detection means for detecting a signal level of each of the band components; and displaying the signal level. A plurality of rectangular display segments are formed in a first direction and a second direction intersecting the first direction.
Bei a display unit which is arranged two-dimensionally aligned in a direction, based on the signal level detected for each of the frequency bands, and a display control unit that controls lighting of the display segment, the
The display segments of the display unit have different vertical and horizontal lengths.
In that equalizer device, a first mode corresponding to each frequency band an array in the second direction of the display segments causes us Keru corresponding to the signal level of the first direction of the array of the display segments on the display unit display for switching, and a second mode in correspondence with the sequence of the second direction of the display segment signal level causes to correspond to the sequence of a first direction in our Keru each display segment on the display unit to each frequency band An equalizer device comprising: a mode switching unit.