JP2512507Y2 - Preset device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Outline] The present invention relates to a presetting device having a plurality of preset memories, and when automatically initializing each preset memory, only a small initial value input operation or initial value storage memory is required. , The purpose is to be able to write different initial values to many preset memories, and multiple preset memories that can preset the setting values of the acoustic characteristics individually, and a standard that gives standard values and constant values. The standard value / constant value is provided by the standard value / constant value providing means in the initial processing at the time of restart, and a plurality of different values are provided based on the standard value. A calculating / writing unit that calculates an initial value and writes the initial value in each memory area of the plurality of preset memories is configured.

[Industrial applications]

The present invention relates to a preset device having a plurality of preset memories, and more particularly to an initial value writing method.

It is easier to use a rewritable memory in which preset values of acoustic characteristics are preset as standard values written as initial values.

[Conventional technology]

Acoustic characteristics of audio equipment (frequency characteristics, delay time,
In order to set the desired reverberation time, volume, etc., and reproduce that state with one touch, a preset memory for storing the set values of the acoustic characteristics is used.

Since this preset memory is rewritable, if a non-volatile memory is not used, it is necessary to write some initial value when the power is connected (at restart).

[Problems to be solved by the device]

To write the initial value to the preset memory,
There are (1) a method of manually inputting the initial value after the power is turned on, and (2) a method of automatically writing the initial value in the initial process at the time of restart.

However, the method (1) requires an input operation each time the power is turned on, and if the number of preset memories is large, extremely complicated work is required. On the other hand, in the method of (2), for example, ROM (read-only memory) is used as an initial value storage memory, and the initial values read from it can be automatically written to the preset memory, so the user's burden is light, but for each preset memory There is a drawback that many ROMs are required to make the initial values different. Therefore, conventionally, the same initial value is written in a plurality of preset memories to save the memory. However, this does not make sense to provide a plurality of preset memories even in the initial state.

The present invention solves the above-mentioned problems of the conventional method and can automatically write different initial values to many preset memories by requiring less initial value input operation or initial value storage memory. To do so.

[Means for solving the problem]

The present invention provides a plurality of preset memories (1,2,3,4,) capable of individually presetting set values of acoustic characteristics, and a standard value / constant value giving standard value (s) and constant value (k). Means (ROM) and the standard value / constant value are given by the standard value / constant value giving means in the initial process at the time of restart, and a plurality of initial values differing by the constant value based on the standard value. And calculating / writing means for calculating and writing in each memory area of the plurality of preset memories.

[Action]

FIG. 1 is a principle view of the present invention. Reference numerals 1 to 4 are preset memories capable of storing setting values of acoustic characteristics. In the present invention, a plurality of initial values (s-k, s, s + k, s + 2) differing by a constant value k based on a common standard value s in the initial process at the time of restarting the preset memories 1 to 4
Calculate and write k).

In this way, since only the standard value s and the constant value k are required as the initial values to be stored in the initial value storage memory (ROM), a small memory can be used. Alternatively, even if the initial value is keyed in from the input unit, only the standard value s and the constant value k are required, so the initial value input operation is also easy.

When a set of preset memories 1 to 4 is provided for each mode, an initial value storage memory or an initial value input operation is required for each mode. FIG. 1 shows an example in which four modes (concert hall, live house, church, stadium) are realized by sound field control by a DSP (digital signal processor). Preset memory 1 for each mode
The preset values of the acoustic characteristics (volume, initial delay time, reverberation time, etc. in the sound field control) are preset in 4 to 4.
For example, if only the standard value s is set in the preset memory 2 as the initial value of this set value, the preset memory 1 is set to a smaller initial value by a constant value k, and the preset memory 3 is set to a larger initial value by a constant value k. Set the value. In this way, the user can realize the acoustic characteristics adjusted to some extent from the initial state with one touch. When the number of preset memories is increased, a wider variety of initial values are realized.

This kind of initialization method can be applied not only to the sound field control but also to the graphic equalizer that stores the set values of the frequency characteristics in the frequency bands in which the preset memories 1, 2, ... Are divided.

〔Example〕

FIG. 2 is an explanatory view showing an embodiment of the present invention. The left side is a RAM table used as a preset memory and the right side is a ROM table used as an initial value storage memory.

In the RAM table, the addresses (#A ₀ , #B ₀ , ... #A ₃ , #B ₃ ) in the vertical direction of the RAM table indicate the respective modes (sound field control modes). In other words, the vertical direction of the address #A _i, subscript i of # B _i can, i = 0 is a concert hall, i = 1 is live house, i = 2 is the church, i
= 3 indicates each mode of the stadium.

Also, the horizontal address 0 to 3 of this RAM table
Is 4 corresponding to each mode of vertical address
The acoustic characteristics of the types are shown.

Therefore, if a plurality of preset acoustic memories such as initial delay time, reverberation sound time, frequency characteristic, speaker level, and woofer phase characteristic are stored in the RAM table as acoustic characteristics, horizontal address 0 to 3 can be selected. Thus, it is possible to read out the acoustic characteristic in which these characteristics are combined.

In the RAM table of this embodiment, an initial delay time is preset in #A, a reverberation sound time is preset in #B, and acoustic characteristics are read as a combination of #A and #B in each mode. To do.

On the other hand, ROM table has an address b _i of the address #a _i and b series a series, # a _i is the initial delay constant value k ₀ and the standard value E _ref of time to initialize #A _i of RAM table ~ N ₀ is divided into addresses 0 and 1 and stored, and #b _i is #B _{i in the} RAM table.
The standard value R _{ev of} reverberation time for initializing and the constant values k _{1 to} n ₁ are stored separately at addresses 0 and 1. The standard value E _ref . R _ev
The lowercase letters h, l, c, s at the end of indicate the concert hall (h), live house (l), church (c), stadium (s).

The flowchart of FIG. 3 shows the initial processing at the time of restart on the premise of the memory configuration of FIG. First, in step S1, the counter P is cleared. The value of P indicates the mode number i in FIG. Next, in step S2, the standard value and the constant value are read from the areas #a _p (0) and #a _p (1) of the ROM table, and the initial values calculated on the basis of them are used as the areas #A _p (0) of the RAM table ~ Write in #A _p (3).

#A _p (1) ← (#a _p (0))… # A _p (0) ← (#a _p (0) − (# a _p (1))… # A _p (2) ← (#a _p (0)) + (#a _p (1)) ... #A _p (3) ← (#a _p (0)) + 2 (#a _p (1)) ... where #A _p (j) is RAM Indicates the area accessed by address #A _i and address j in the table (i = 0 to 3, j =
0-3), and at the same time, #a _p (j) indicates the area accessed by the address #a _i and address j of the ROM table (i = 0.
~ 3, j = 0,1). _{Further, (# a p (0)} ) is the standard value, (# a _p
(1)) indicates a constant value. Here, for example, the standard value #a ₀ (0) of the initial delay time #A ₀ of this concert hall is 150 m
sec, when a constant value #a ₀ (1) is set to 50msec, #A ₀ (0) is 100mse as the value calculated and written in the RAM table.
c, #A ₀ (1) is 150 msec, #A ₀ (2) is 200 msec, #A ₀
(3) becomes 250 msec, and four different initial delay characteristics are preset.

In step S3, similar processing is performed for the B series.

_{#B p (1) ← (#b} p (0)) ... #B p (0) ← (#b p (0)) - (# b p (1)) ... #B p (2) ← (# b _p (0)) + (# b _p (1)) ... #B _p (3) ← (#b _p (0)) + 2 (#b _p (1)) ... When the processing of steps S2 and S3 is completed RAM table #
A _0, although # B ₀ is initialized as in the second diagram, #A ₁ at this stage, # B ₁ below is indefinite. Therefore, in step S4, the counter P is incremented, and next, P = 1 is set and the processing in steps S2 and S3 is performed. This #A _1, # B ₁ are initialized.

Thereafter, if P = 2 and P = 3 are similarly increased to initialize all the areas of the RAM table, it is determined that P> 3 in step S5, and thus the initial processing is completed.

FIG. 4 is a block diagram showing a concrete example of the present invention, 10 is a DS
P, 20 is a microcomputer that realizes a memory control device, 30 is an external operation switch (switch), 40 is a display, 50 is an A / D converter on the input side, 60 is a D / A converter on the output side, 70 is a speaker.

This example shows a stereo system with 2-channel speakers, and the left and right audio signals L and R (sources are cassette, CD, D
(AT, etc.) is converted into a digital signal by the two A / D converters 50 and taken into the DSP 10. The left and right digital signals processed by the DSP 10 are converted into analog signals by the four D / A converters 60 and reproduced by the four speakers 70. still,
The speaker 70 has FL on the front left, RL on the rear left, FR on the front right, and RR on the rear right.

And a RAM table as preset memory,
A ROM table storing standard values and constant values is provided in the microcomputer 20, and when the audio device is restarted, the initial processing unit of the microcomputer 20 performs the arithmetic processing shown in the flowchart of FIG. The acoustic characteristics are written on the table. Also,
The microcomputer 20 gives various correction coefficients to the signal processing unit in the DSP 10 in order to reproduce these acoustic characteristics. Then, the signal processing unit of the DSP 10 that has received the correction coefficient performs signal processing such as delay, multiplication, and addition on the input audio signal to add the acoustic characteristic. In this example, the user can arbitrarily change this coefficient with the operation switch 30.
The display device 40 displays various modes and displays time, level, etc. during adjustment or reproduction.

FIG. 5 shows the details of the operation switch 30. This operation SW30 is 4 ×
EFC is a mode selection switch that is configured in a matrix of 4 and that indicates the mode sound field to be played by the number of times of ON. If the playable sound field is a concert hall, a live house, a church, or a stadium, these modes are cyclically switched each time the EFC is turned on.

TiME is an adjustment item selection switch that toggles between the factors that determine the characteristics of the sound field when adjusting the initial delay time and reverberation time. When the initial delay time and the reverberation time are displayed in the same display segment, a display switching function is also provided.

+ And-are switches that increase or decrease the initial delay time and reverberation time, and change the set time by a unit amount each time they are turned on.
It has the function of changing the set time in proportion to the ON time.

1-4 are initial delay time, reverberation time, speaker level,
This is a preset memory selection switch that stores the sound field characteristic determining factors such as woofer phase as a set. This memory selection 1-4
When one of the two is pressed, the sound field characteristic determining factor stored in the corresponding memory is read out. Writing to the memory is performed by providing a separate memory (MEMO) SW or by continuing the same memory selection SW1 to SW4 longer than a fixed time.

FUNC is a speaker selection switch that indicates the speaker whose output level is to be adjusted. Each time this FUNC is turned on, FR, FL, RR, or RL of the speaker 70 can be cyclically selected. When the selected speaker is displayed, it is also used for switching the display.

UP and DOWN are switches that increase or decrease the output level of the speaker selected by FUNC. Each has a function of changing the level by one step each time it is turned on, or changing the level in proportion to the time during which it is turned on.

FIG. 6 is a main routine executed by the microcomputer 20, A1 is initialization including initialization of the RAM table described above, and A2 is a time waiting step for setting an interval for repeating this routine, for example, 25 ms. twenty five
When ms have passed, the SW status is fetched in step A3, and step A4
If there is a SW determined to be ON in step S5, the SW process is performed in step A5. Step A6 is a display output changing process performed once every 25 ms.

7A to 7C are flowcharts showing a main example of the SW process A5, and FIG. 7A is an EFC ON process. In this process, first, the mode counter is incremented in step C2, and the count value 4 is set to 1 in steps C3 and C4. Next, in steps C5 to C7, the value of the counter is judged and 1
If so, set the sound field in the concert hall in step C8, and if it is 2, set in the live house in step C9,
If it is 3, it is set in the church in step C10, and if it is 4, it is set in the stadium in step C11.

(B) is a process of TiME, and a flag called a reverberation flag is used in this process. When this flag is set, it indicates the initial delay time, and when it is cleared, it indicates the reverberation time. It is inverted (set / cleared) every time TiME is turned on (steps D2 to D4).

(C) is a process for increasing the reverberation time by using the + SW (step E13) or increasing the initial delay time (step E14). Which time is adjusted is indicated by the reverberation flag shown in (b). (Step E12). These times are shortened by using a negative SW.

FIG. 8 shows a memory configuration in the microcomputer 20 of FIG. This structure and operation are shown in FIGS.
This is as explained in the figure. In addition, when calculating something other than the initial delay time, reverberation time, or other time, for example, when presetting the level of the center speaker, the standard value S =
If −3db and constant value k = 3db, microcomputer
At 20, the arithmetic processing for logarithmic conversion based on the standard value and the constant value is performed, and the finally preset value is a value that is different by a constant value based on the standard value, −6db, −3db, 0d.
Four values of b and + 3db are written in the preset memory.

Therefore, in the present embodiment, the setting of the initial delay time and the reverberation time was mainly described, but not only the time but also the frequency characteristic level, the speaker level, the woofer phase, and the like are calculated according to each acoustic characteristic. By doing so, it is possible to write a plurality of initial values, which differ by a constant value based on the standard value, in the preset memory.

[Effect of device]

As described above, according to the present invention, it is possible to automatically write different initial values to a plurality of preset memories, and there is an advantage that the initial value input operation and the initial value storage memory required for it can be reduced. .

[Brief description of drawings]

 FIG. 1 is a principle diagram of the present invention, FIG. 2 is an explanatory diagram of an embodiment of the present invention, FIG. 3 is a flowchart of an initial process of the present invention, FIG. 4 is a block diagram showing an example of an audio device, and a fifth diagram. Figure is a detailed view of the operation SW, Figure 6 is a flowchart of the main routine of Figure 4, Figure 7 is a detailed flowchart of the SW processing of Figure 6, and Figure 8 is a memory configuration diagram of the main part of the microcomputer of Figure 4. Is.

Continuation of front page (56) References JP-A-2-137898 (JP, A) JP-A-60-51895 (JP, A)

Claims (1)

(57) [Scope of utility model registration request] 1. A plurality of preset memories (1, 2, 3, 4,) capable of individually presetting set values of acoustic characteristics, and a standard value / constant value for giving a standard value (s) and a constant value (k). The assigning means (ROM) and the standard value / constant value assigning means provide the standard value and the constant value in the initial process at the time of restart, and based on the standard value, a plurality of initial values differing by the constant value. A presetting apparatus comprising: a calculating / writing unit that calculates a value and writes the value in each memory area of the plurality of preset memories.