JPH03239007A - Display system for audio device - Google Patents

Abstract

PURPOSE:To attain more accurate adjustment than that relying only on the auditory sense by adjusting sound volume depending on an electronic attenuator or a delay time or an echo time by a DSP while referring to relative adjustment and direction display based on a setting value at the start of adjustment. CONSTITUTION:When an electronic volume is used for an acoustic characteristic setting section 1, an audio signal in inputted/outputted as it is, but when DSP is employed for the acoustic characteristic setting section 1, the audio signal is converted from an analog signal into a digital signal or vice versa by using an A/D converter 5 and a D/A converter 6. Into which direction and how much a setting value at the start of adjustment is changed are displayed in the case of the relative value display. For example, left half LEDs 71-76 are lighted sequentially from the right to display a change in a negative direction and right half LEDs 81-86 are lighted in orange (O) sequentially from the left to display a change in a positive direction. After the end of adjustment, a setting value at the end of adjustment is stored and the result is displayed in terms of the absolute value by using the LEDs 71-76, 81-86.

Description

[Detailed Description of the Invention] [Summary] Regarding the display method of an audio device, the purpose of this invention is to easily distinguish the amount and direction of adjustment during adjustment of acoustic characteristics, and to display desired acoustic characteristics for audio signals. an input section for inputting a set value of the acoustic characteristic; a control section for storing the set value and determining the acoustic characteristic of the setting section; In the display method of the audio device, the control unit outputs relative display data based on a setting value at the start of adjustment while the input unit is adjusting the acoustic characteristics. Furthermore, after the adjustment is completed, the system is configured to output absolute display data of the set value at the time of completion of the adjustment.

[Industrial application field]

The present invention relates to a display method for an audio device.

When adjusting acoustic characteristics such as volume, delay time, and reverberation time on an audio device, it is convenient to display these setting values because you can visually understand the acoustic characteristics.

[Conventional technology]

In a device that adjusts the volume using an electronic volume, several settings can be preset by storing the setting value given to the electronic volume in a memory on the control device side. Although the volume level to be preset is a value that the user perceives audibly, displaying the level using a display device has the advantage that the preset value can be confirmed visually. In particular, since minute differences in delay time and reverberation time for sound field control are difficult to audibly grasp, displaying them on a display device is extremely effective.

FIG. 5 is an explanatory diagram of a conventional display method. The display shown in Figure 1 is an array of 12 bar-shaped LEDs, and the level is displayed in 5 dB steps by the number of LEDs (indicated by diagonal lines) that are continuously lit from the left end. In other words, the same figure (5
), if all LEDs are lit, the maximum level (
For example, 0 dB).

In another case, there are LEDs that are off (shown in white), so the value is lower than the maximum level by the number of LEDs x 5 dB. For example, (1) is -60 dB, (2) is -
55 dB, (3) is -50 dB, . . .

For example, an up switch UP and a down switch DOWN are used to adjust the volume level. When UP is turned on (indicated by diagonal lines), the volume level increases by l steps (5 dB), and the display on the display changes accordingly. In the same figure (
1) to (5) show display changes when the volume increases. Conversely, when DOWN is turned ON (indicated by diagonal lines), the volume level decreases by one step (5 dB), and the display on the display changes accordingly. (5) to 00 in the figure show changes when the volume decreases.

[Problem to be solved by the invention]

Since the display method shown in FIG. 5 is an absolute level display, for example, when adjustment is started from -55 dB and changed to -45 dB, the display changes from (2) to (4).

Therefore, when (4) is displayed, the user may
If you don't remember the display, you won't know how much the level has changed due to your own operations. Further, even if the direction of adjustment is undesired, if the display in (2) is forgotten, the state before the start of adjustment (-55 dB) cannot be restored. This kind of inconvenience is especially true for delay times, reverberation times, etc., where minute differences are difficult to grasp compared to volume.

The present invention makes it easier to adjust the acoustic characteristics by displaying the above-described display during the adjustment of the acoustic characteristics relative to the set value at the start of the adjustment.

[Means to solve the problem]

Figure 1 shows the constituent countries of the present invention, l is the electronic volume, DS
Acoustic characteristic setting section such as P (digital signal processor), 2 is an input section using a key SW (switch), etc., 3 is an input section 2
4 is a control section that stores setting values from and determines the acoustic characteristics of the setting section 1; and 4 is a display section that displays the acoustic characteristics of the setting section 1.

When the acoustic characteristic setting part l is an electronic volume, the audio signal can be input and output as is, but when it is a DSP, an A/D converter 5 and a D/A converter 6 are used to convert the analog signal to a digital signal. Performs the transformation and inverse transformation of .

The display section 4 may be of a bar display type as shown in FIG. 2(a), for example.
It can be of a dB display type such as 4. The bar display type (6) has 12 bar-shaped LEDs arranged in a row, of which LEDs 71 to 76 on the left half are green (G) emitting type, and LEDs 81 to 86 on the right half are green (G)/orange ( 0) is a two-color emitting type. The dB display type in (b) is a 2-digit 7-segment LED 91, 92 and +
, - display LED 93, and LE for displaying rdBJ
This is an arrangement of D94.

[Effect]

Taking the display device in FIG. 2(a) as an example, in absolute value display, all LEDs 71 to 76 and 81 to 86 are lit in order from the left end to display the set value as is (LE081
~86 is lit in green).

This may be the same as the method shown in FIG.

On the other hand, relative value display displays the amount of change in which direction from the set value at the start of adjustment. For example, in the display device of FIG. 2(a), the left half LEDs 71 to 76
are lit in order from the right end to display the amount of change in the (-> direction, and the right half LEDs 81 to 86 are lit in orange (0) in order from the left end to display the amount of change in the (+) direction.

After the adjustment is completed, the set value at the time of the adjustment is completed is memorized, and this is stored in the LE.
Absolute values are displayed using D71-76.81-86.

In the relative value display using the dB display type in Figure 2 (b), it is +.

– is distinguished by LED 93, and the amount of change is determined by 2-digit LED 9.
You can do it with 1.92. For absolute value display, set value on LED9
1 and 92, and if there is a polarity, the polarity is displayed using an LED 93.

(Embodiment) FIG. 3 is a flowchart showing an embodiment of the present invention, and shows an example of setting value change and display processing by the control section 3 of FIG. 1.

Figures 3(a) and 3(b) show the main routine, and in step St, the variable LE for absolute display and level setting is initialized to -30 (dB), which is between -60 dB and O dB. In the next step S2, the variables UPC and D for relative display are
OC is cleared. UPC is for UP, DOC is for DOW
It is for N. Steps S3 and 34 are up switch UP
This is the ON determination of the down switch 00WH. If it is determined in step S3 that UP is ON, the UP side relative display variable @UPC is incremented in step S5, and if it is determined that DOWN is ON in step S4, the DOWN side relative display variable DOC is incremented in step S6.

Then, in step S7, the value of upc is set to r6J (LE
D81 to D86), and if the number is 6 or more, the UPC is unified to 6 in step S8. Similarly, step S9. S
In IO, the upper limit of DOC is also limited to r6J (number of LEDs 71 to 76).

Next, a display frequency LED is introduced, and in step S11, the value of this variable is set to LED-2-64. This is because if the positions of LEDs 71 to 76.81 to 86 are set to 2°+2'l...2IS in order from the left end, the right half LEDs 81 to 86 are lit in order from the left end according to the upc value. . For example, when UPC=1, LED-2- becomes LED-2-, and only the leftmost LED 81 lights up. Moreover, when it becomes UPC-2, LED=2'+2', and LED81.82 lights up. The same applies hereafter.

On the other hand, in step S12, the value of the display variable is &-g16
c LED-64-2. This is to light up the LEDs 71 to 76 in the left half in order from the right end. For example, when DOC=1, L
Since ED=2', only the rightmost LED 76 lights up. Also, when DOC=2, LED=2'+2',
! -@ru(7), LED76.75 lights up. The same applies hereafter.

In this example, when the switch UP or DOWN is pressed for the first time, only the switching from absolute display to relative display is performed.
The variable LEV is not changed. Changing the LEV should start from the second and subsequent switch operations.Steps 313 and 514
), increase or decrease by 5 dB per l operation (steps 315, 316); however, the display of the absolute level by the display device of FIG. Since it cannot be performed beyond the OdB range where the LED is lit, steps S17~
320 limits the upper and lower limits of LEV to OdB and -60 dB.

Once the variables LED and LEV have been changed in this way, other processing A (for example, level setting) is performed in step 321, and then the SW OFF time measurement variable TC and the 5WOFF time setting variable TK are compared in step S22. Then, when TC has not dropped TK, in step 323, the variable L
Relative display is performed based on ED, and when TC exceeds the TK group, absolute display is performed based on variable LEV in step S24.

The process in step S22 attempts to automatically return from relative display to absolute display. That is, in the interrupt process (C), the switch u is
When the falling edge (OFF-ON) of p or 001N is detected, the state of the SW is determined in the next step 332. ON
If so, the TC is cleared in step S33, but it is OFF.
When this happens, TC is incremented in step S34.

Therefore, the value of TC used in step S22 (b) is the elapsed time after 5WOFF. Therefore, if you set TK to a constant value, for example 1 sec, 1 sec after SW OFF.
When sec has elapsed, the relative display in step S23 is automatically switched to the absolute display in step S24.

Then, in step S25, the value of TK (15ec) is set to TC.
After that, in step S22, TC? is always copied.
Since KT is established, the absolute display in step 324 is continued.

Figure 4 shows the display changes due to the above processing, as shown in Figure 2(a).
The display device shown in Fig. 4 (1) (6) is shown as an example.
)01) is an absolute display, (2) to (5) are relative displays on the + side, and (7) to OI are relative displays on one side. Lighted LEDs and ON switches are shown with diagonal lines, and off LEDs and OFF switches are shown in white.

In Figure 4 (1), the three LEDs from the left end are green (G)
This is an absolute display of -60dB lit up.

When you turn on UP in this state, only the 7th LED from the left side lights up in orange (0) as shown in (2).
Switches to relative display of B. If you continue to turn on UP (
3) The 8th LED also lights up orange and +5
The relative display will be in dB. Similarly, each time UP is turned on, the number of orange lighting LEDs increases as shown in (4)<s). Note that the selection process of G10 is omitted.

Adjustment is completed in the state of (5), and if 1 sec passes without doing anything after turning off the UP in (4), then from (5) to (6)
Switch to absolute display, -60dB+15dB=-45
dB is displayed.

When DOWN is turned ON in the state (6), the display changes to (7), and only the sixth LED from the left side lights up in green to display the OdB relative display. Do further from this state
When WN is turned on, depending on the number of times it is turned on, (8) ~
The number of green LEDs increases as shown in (9).

Then, after turning OFF the DOWN in (9), do not do any 6 and 1
When sec has elapsed, the relative display (00) is automatically switched to the absolute display (11).

The present invention can be modified as follows.

(A) Program S to switch from absolute display to relative display
Switching from relative display to absolute display is performed using preset SW. This method is natural because it corresponds to the operation procedure of the preset method.

(B) By instructing the display during g4 adjustment using the display switching SW, it is possible to perform either absolute display or relative display. This method is convenient for checking the absolute value during adjustment.

(C) After pressing UP or DOWN to change to relative display, turn on the opposite SW to immediately return to absolute display before starting adjustment. - This method is convenient in cases where the user makes a mistake in the direction of adjustment because even if the user does not remember the setting value before starting the adjustment, the user can return to it with a single touch.

(D) Figure 2 (The tfb of the display device in 0 is all of the same type, and the + side ψ relative display is performed from the left end, and the relative display in the - example is performed from the right end. In this case, even if the LED is monochrome, it is G10 If it is a two-color emitting type, O can be used for 10, and G can be used for -.This method can double the accuracy during adjustment, so it can be used for microscopic adjustments. It has the advantage of being adjustable.

〔Effect of the invention〕

As described above, according to the present invention, the volume adjustment using the electronic attenuator or the delay time and reverberation time adjustment using the DSP can be performed by referring to the display of the relative adjustment amount and direction based on the set value at the start of the adjustment. This has the advantage that more accurate adjustments can be made than when relying only on auditory sense.

[Brief explanation of drawings]

Figure 1 is the constituent countries of the present invention, Figure 2 is the constituent countries of the display device of the present invention, Figure 3 is a flowchart of the embodiment of the present invention, Figure 4 is an explanatory diagram of the display method of the present invention, The figure is an explanatory diagram of a conventional display method. In the figure, l is an acoustic characteristic setting section 1, 2 is an input section, 3 is a control section, and 4 is a display section. Applicant Fujitsu Ten Ltd.

Claims (1)

[Claims] 1. An acoustic characteristic setting section (1) for imparting desired acoustic characteristics to an audio signal; an input section (2) for inputting a set value of the acoustic characteristic; and an input section (2) for storing the set value. a control unit (
3), and a display section (4) that receives and displays display data according to the set value from the control section, wherein the control section adjusts the acoustic characteristics by the input section. A display method for an audio device characterized in that during the adjustment, relative display data is output based on the set value at the start of adjustment, and after the adjustment is completed, absolute display data of the set value at the time the adjustment is completed is output.