JP2973013B2 - Preset device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a preset device that does not require a preset operation, and aims to improve the operability of equipment by automating the preset operation and adjust characteristics of a predetermined signal. A preset device for presetting a parameter whose value can be changed, a plurality of preset memories (0 to n), a detecting means for detecting a change state of the parameter, and a detecting output from the detecting means. Preset means for automatically presetting the changed parameter in one of the plurality of preset memories upon detecting that the parameter has been changed and thereafter the changed parameter has been used for a certain period of time.

[Industrial applications]

The present invention relates to a preset device that does not require a preset operation.

The reception frequency in the tuner, the level of each divided frequency band in the graphic equalizer, the parameters such as the initial delay time and reverberation time in the sound field control device are stored in advance in a preset memory rather than adjusting each time, It is more convenient to be able to select one of them by button operation.

[Conventional technology]

The above-mentioned preset method generally uses a plurality of preset memories, one of which is selected by a memory selection button. Even if a preset memory is selected with this button, it is unknown whether to read and use parameters from the memory or to write new parameters to the memory. In the latter case, for example, the user presses the preset button. Often.

[Problems to be solved by the invention]

In the preset method described above, the minimum preset button is
In addition, in general, the adjusted parameters cannot be preset unless the memory selection button is operated, so that the operability is poor. Particularly, in the case of in-vehicle equipment, complicated operation is not preferable because it hinders safe driving.

The present invention makes it possible to automatically preset desired parameters without requiring such a memory selection operation and a preset operation.

[Means for solving the problem]

The present invention relates to a preset device for presetting a parameter that can be changed to a value for adjusting a characteristic of a predetermined signal, a plurality of preset memories (0 to n), and a detecting means for detecting a change state of the parameter. Detecting, based on the detection output from the detection means, that the parameter has been changed and thereafter the changed parameter has been used for a certain period of time, the changed parameter is stored in one of the plurality of preset memories. Presetting means for automatically presetting.

[Action]

It can be temporarily determined that the parameters used for a fixed time after the adjustment is completed are the values desired by the user. Therefore, in the present invention, by automatically presetting these parameters, the user does not need to perform a preset operation.

Further, in the present invention, the preset memory for storing the current parameter is automatically selected from the plurality of preset memories, so that the user does not need to perform a memory selecting operation.

There are several ways to select a memory. In the simplest case, the preset memories 0, 1, 2,... As shown in FIG.
n like a shift register, with the latest parameters
In this method, PG is always written in the memory 0, and the oldest parameter PG- _n is erased from the memory n. According to this method, the parameters PG to PG- _n are preset in the memories 0 to _n so that the higher the preset time, the higher the priority.

In actual usage, it may be easier to use the small-to-large order than the new to old order. In this case, the parameters may be rearranged in ascending order (ascending or descending), for example, as PG ₀ <PG ₁ <PG ₂ <... As shown in FIG. However, in this case, if the oldest one is to be erased, the next parameter to be erased is unknown due to the rearrangement. Therefore, it is necessary to separately store the preset order. Do this in the case of FIG. (B), PG ₁ indicates that the latest (1), PG _-n oldest (n).

〔Example〕

FIG. 2 is a block diagram showing an embodiment of the present invention, taking a sound field control device as an example. In the figure, 10 is a DSP, 20 is a microcomputer that realizes a preset device as a part thereof, 30 is an external operation switch (switch), 40 is a display, 50 is an A / D converter on the input side, and 60 is an output. A side D / A converter, 70 is a speaker.

This example shows an example in which the present invention is applied to a two-channel speaker stereo system. Left and right audio signals L and R (source is a cassette, CD, DAT, etc.) are converted into digital signals by two A / D converters 50. Captured by DSP10. The left and right digital signals processed by the DSP 10 are converted into four D / A converters 60.
Is converted to an analog signal, and reproduced by four speakers 70. In addition, FL of the speaker 70 is the front left, RL is the rear left,
FR is front right, RR is rear right.

The DSP 10 receives various correction coefficients from the microcomputer 20, performs signal processing such as delay, multiplication, and addition on the input signal to add reverberation sound and the like. This coefficient can be arbitrarily changed by the user with the operation SW30. The display unit 40 displays various modes, and displays the time, level, and the like during adjustment or playback.

FIG. 3 shows the details of the operation switch 30. This operation SW30 is 4 ×
The EFC is a mode selection switch that indicates the sound field of the mode to be reproduced by the number of ON times. Assuming that the reproducible sound field is a concert hall, a live house, a church, or a stadium, these modes are cyclically switched every time the EFC is turned on.

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

+ And-are switches to increase or decrease the initial delay time and reverberation time.
It has a function to change 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 for storing a set of sound field characteristic determining factors (parameters) such as a woofer phase. When one of the memory selection switches SW1 to SW4 is pressed, the parameters stored in the corresponding memory are read. Writing to the memory is automatically performed as described above.

FUNC is a speaker selection switch for specifying a speaker whose output level is to be adjusted. The FUN can cyclically select FR, FL, RR, and RL of the speaker 70 every time the FUN is turned ON. When displaying the selected speaker, it is also used for switching the display.

UP and DOWN are switches for increasing or decreasing 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 ON time.

FIG. 4 shows a main routine executed by the microcomputer 20. In FIG. 4A, Al denotes initialization including initialization of the RAM table and the like, and A2 denotes a time waiting step for setting an interval for repeating this routine, for example, 25 ms. . When 25 ms has elapsed, the SW state is captured in step A3, and if there is a switch that is determined to be ON in step A4, the SW processing is performed in step A5. Step A6 is a display output change process performed once every 25 ms.

FIGS. 5A to 5C are flowcharts showing main examples of the SW process A5, and FIG. 5A shows the EFC ON process. In this process, first, the mode counter is incremented in step C2, and the process of setting the count value 4 next to 1 is performed in steps C3 and C4. Next, in steps C5 to C7, the value of the counter is determined.
If so, set the sound field to the concert hall in step C8, if it is 2, set it to 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 the TiME, in which a flag called a reverberation flag is used. When this flag is set, it indicates the initial delay time, and when it is cleared, it indicates the reverberation time, which is inverted (set / cleared) every time the 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). The reverberation flag shown in (b) indicates which time is to be adjusted. (Step E12). The use of the -SW shortens these times.

Although the above processing is general, in the present invention, the fourth processing is performed.
In the figure, (b) the automatic preset processing (A7 to A15) and (c)
A time interrupt routine (A16 to 17) is added, and a flag setting process (E15) is added to FIG. 5 (c).

Steps A7 to A15 in FIG. 4 (b) are executed in the part B while returning from step A6 to A2 in FIG. 4 (a). In the sound field control, when the reverberation time or the initial delay time is changed, the waveform shown in FIG.
Since the SW process is executed, the parameter change start flag is turned ON (the parameter change flag is cleared) in step E15. In the main routine, if this change start flag is determined to be ON in step A7, then + and -SW are turned off, and further, it waits for 1s after being turned off, during which +, -SW
If is not pressed, clear the parameter change start flag and turn on the parameter change flag at the same time (step
A7 to A11). As a result, the preset timer (c) starts, and the elapsed time from when the parameter change flag is turned on is counted by the counter PC (steps A16 to A18). This counter PC is compared with a constant value K (for example, 3 minutes) in step A12 of the main routine, and when PC ≧ K, presetting is automatically performed in step A13. Next, in step A14, the first
The contents of the preset are shifted as shown in FIG. 9A or 9B, the parameter change flag is cleared in step A15, and the process returns to step A2.

By doing so, the parameters at that time are automatically preset if nothing is done after the adjustment is completed, so that the operability is good. However, in this method, the same parameter may be preset in a plurality of preset memories in an overlapping manner. This is not preferable from the viewpoint of effective use of the preset memory. Therefore, it is preferable to determine the same memory at the time of presetting and avoid it by a method such as not performing presetting.

〔The invention's effect〕

As described above, according to the present invention, since the preset operation can be automated, the operability accompanying the preset can be improved, and the driving safety can be enhanced particularly when applied to an in-vehicle device. There are advantages.

[Brief description of the drawings]

FIG. 1 is a principle diagram of the present invention, FIGS. 2 to 5 are explanatory views of an embodiment of the present invention, FIG. 2 is a block diagram showing an example of an audio device, and FIG. FIG. 4 is a flowchart of the main routine of FIG. 2, and FIG. 5 is a detailed flowchart of the SW process of FIG.

Continuation of front page (72) Inventor Kago Masuda 1-2-28 Gosho-dori, Hyogo-ku, Kobe-shi, Hyogo Inside Fujitsu Ten Co., Ltd. (56) References JP-A-64-49312 (JP, A) JP-A-63 -257321 (JP, A)

Claims (3)

(57) [Claims] 1. A preset apparatus for presetting a parameter whose value can be changed in order to adjust a characteristic of a predetermined signal, comprising: a plurality of preset memories (0 to n); and detecting means for detecting a change state of the parameter. Based on a detection output from the detection means, when it is detected that the parameter has been changed and thereafter the changed parameter has been used for a certain period of time, the changed parameter is stored in one of the plurality of preset memories. And a presetting means for automatically presetting a preset value. 2. The preset apparatus according to claim 1, wherein said preset means has a higher priority for the newest parameter, and deletes the oldest parameter in order to clear a preset memory. 3. A preset apparatus according to claim 1, wherein said preset means reorders preset parameters with a predetermined regularity.