JP2007251621A - Indication device and indication program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an indication device capable of displaying the history of an indication value, and to provide an indication program. <P>SOLUTION: The indication device includes an acoustic signal reading means 11 for reading an acoustic signal; an instantaneous value calculating means 12 for calculating the instantaneous value of the acoustic signal; a history value calculating means 13 for calculating the history value of the acoustic signal, based on the instantaneous value; a history value storage means 14 for storing the history value; and a display means 15 for displaying the instantaneous value and the history value, side by side. The display means 15 includes an instantaneous value displaying means 151 for displaying the instantaneous value; and a history value displaying means 152 for displaying the history value. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an instruction device and an instruction program, and more particularly to an instruction device and an instruction program having a function of displaying an instruction value history.

  The level of a signal that changes from moment to moment, such as an acoustic signal, depends on how the pointing device is read.

  For example, a VU value that indicates the magnitude of an acoustic signal is defined as “an indication value that causes the frequency of a frequently appearing peak to pass or lightly exceeds it”, and a method for objectively determining the VU value is also defined.

In view of the fact that it is now common for the present applicant to display an indicated value on a display device such as a liquid crystal rather than a pointer-type meter, the VU is considered in consideration of the dynamic characteristics of a conventional pointer-type meter. A "dynamic characteristic simulation method, apparatus, and program" that can display values and the like have already been proposed (see, for example, Patent Document 1).
Japanese Patent Laying-Open No. 2005-283343 ([0026], FIG. 1)

  However, since conventional VU meters indicate instantaneous values, it is necessary to memorize “peaks that often appear” in the past, and not only skill is required to determine an accurate VU value, but the VU value There was a problem that it was not possible to avoid including reading errors.

  Note that the “dynamic characteristic simulation method, apparatus, and program” according to the proposal of the present applicant cannot solve the problem that “peaks that frequently appear must be stored”.

  The present invention has been made to solve the conventional problems, and an object of the present invention is to provide an instruction device and an instruction program capable of displaying an instruction value history.

  The pointing device of the present invention includes an acoustic signal reading unit that reads an acoustic signal, an instantaneous value calculation unit that calculates an instantaneous value of the acoustic signal, and a history value calculation that calculates a history value of the acoustic signal based on the instantaneous value. Means, a history value storage means for storing the history value, and a display means for displaying the instantaneous value and the history value side by side.

  With this configuration, the history of instruction values can be displayed.

  The pointing device of the present invention has a configuration in which the history value calculation means calculates a predetermined number of peak values of the instantaneous values as the history value.

  With this configuration, it is possible to display a history of past peak values of instantaneous values.

  The pointing device of the present invention has a configuration in which the history value calculation means calculates an average value of a predetermined number of the instantaneous values as the history value.

  With this configuration, it is possible to display a history of average values of past instantaneous values.

  The pointing device of the present invention has a configuration in which the history value calculation means calculates a percentage time rate average value of a predetermined number of the instantaneous values as the history value.

  With this configuration, it is possible to display a history of the percentage time rate average value of past instantaneous values.

  In the pointing device of the present invention, the instantaneous value calculating means includes means for calculating an instantaneous VU value as the instantaneous value based on an average value of absolute values of a predetermined period of sound signals or a mean square value of predetermined periods. have.

  With this configuration, an instantaneous VU value can be calculated as an instantaneous value.

  The present invention can provide an instruction device and an instruction program having an effect that a history of instruction values can be displayed.

Hereinafter, embodiments of a pointing device according to the present invention will be described with reference to the drawings. In the present specification, the average value of the percentage time rate of the instantaneous value means an average value obtained by selecting a predetermined percentage number from a larger value among a predetermined number of instantaneous values. To do.
(First embodiment)
As shown in the block diagram of FIG. 1, the pointing device 1 according to the first embodiment includes an acoustic signal reading unit 11 that reads an acoustic signal, an instantaneous value calculation unit 12 that calculates an instantaneous value of the acoustic signal, and an instantaneous value. A history value calculation unit 13 that calculates a history value of the acoustic signal based on the history value, a history value storage unit 14 that stores the history value, and a display unit 15 that displays the instantaneous value and the history value side by side are included.

  The display unit 15 includes an instantaneous value display unit 151 that displays an instantaneous value, and a history value display unit 152 that displays a history value.

  FIG. 2 is a block diagram illustrating a hardware configuration of the pointing device 1 according to the first embodiment. The pointing device 1 includes a personal computer (hereinafter referred to as a PC) 2, a display panel 26, a keyboard 27, and a pointing device. And peripheral devices including the device 28.

  The PC 2 includes an input interface (I / F) 21 that digitizes and captures an acoustic signal s (t), a CPU 22 that executes processing, a memory 23 that stores processing programs and processing results, and peripherals connected to peripheral devices Device I / F24.

  That is, the PC 2 functions as an instruction device according to the present invention by installing an instruction program.

  The operation of the pointing device according to the present invention will be described below with reference to the flowchart of the pointing program.

  FIG. 3 is a flowchart of an instruction program for calculating an instantaneous value from an acoustic signal and calculating and displaying one history value for each of the calculated N instantaneous values. The CPU 22 first counts the number of instantaneous values. The index n for initialization is initialized to “1” (step S31), and an instantaneous value calculation routine described later is executed (step S32).

  Next, the CPU 22 determines whether or not the index n has reached the required number N of instantaneous values, which is the number of instantaneous values necessary for calculating one history value (step S33), and the required number of instantaneous values. When it is determined that N has not been reached, the index n is incremented (step S34), and the process of step S32 is repeated.

  The required number N of instantaneous values is determined as follows.

  It is assumed that the instantaneous value calculation routine in step S32 calculates an instantaneous value a times per second, and M history values for the past T seconds are displayed in step S37.

In order to display all instantaneous values calculated by the instantaneous value calculation routine, the display number M needs to be “a × T” or more, but the display number M may be less than “a × T”. Since it is normal, the required number N of instantaneous values can be determined by [Equation 1].

  On the other hand, when the CPU 22 determines that the index n has reached the required number N of instantaneous values, the CPU 22 sequentially executes a history value calculation routine (step S35), a history value storage routine (step S36), and a display routine (step S37). To do.

  Finally, the CPU 22 determines whether or not processing has been performed up to the last acoustic signal (step S38). When the CPU 22 determines that processing has been performed up to the last acoustic signal, the program ends. On the other hand, when the CPU 22 determines that the process has not been performed until the last acoustic signal, the CPU 22 returns to the process of step S31.

  Details of the instantaneous value calculation routine, the history value calculation routine, the history value storage routine, and the display routine will be described below.

  FIG. 4 is a detailed flowchart of the instantaneous value calculation routine executed by the CPU 22 in step S32 of the instruction program, and illustrates a case where the VU value that is the magnitude of the acoustic signal is calculated.

  First, the CPU 22 initializes the integrated value A to “0” (step S401), and initializes an index i representing the number of digitized acoustic signals read during the instantaneous value calculation period ΔT, which is a predetermined period, to “1”. (Step S402).

  Next, the CPU 22 reads the digitized acoustic signal s (i) (step S403), integrates the absolute value of the digitized acoustic signal s (i) (step S404), and the index i is an instantaneous value calculation period. It is determined whether or not the number of samples I indicating the number of acoustic signals s (i) generated at ΔT has been reached (step S405).

  In order to display instantaneous values momentarily in consideration of the dynamic characteristics of the pointer-type VU meter, the instantaneous value calculation period ΔT is compared with the rise and fall characteristics of the VU meter, which is about 300 milliseconds. It needs to be set to a sufficiently short time. For example, when the acoustic signal s (t) is digitized at a sampling frequency of 48 kHz, it is sufficient to set the instantaneous value calculation period ΔT to a time for every 1024 samples, that is, 21.3 milliseconds. When the instantaneous value calculation period ΔT is 21.3 milliseconds, the number of samples I is 1024, and the number a of instantaneous values calculated per second is 46.875.

  When the CPU 22 determines that the index i has not reached the sample number I, the CPU 22 increments the index i (step S406) and returns to the process of step S403.

  Conversely, when the CPU 22 determines that the index i has reached the sample number I, the CPU 22 calculates the average value R by dividing the integrated value A by the sample number I (step S407), and the average value R is one before. It is determined whether or not it is greater than the instantaneous value S (n-1) obtained in the instantaneous value calculation period (step S408).

  When the CPU 22 determines that the average value R is larger than the instantaneous value S (n−1), the CPU 22 sets a time constant τ corresponding to the dynamic characteristic in the VU meter to a predetermined rising time constant τU (step S22). S409) When it is determined that the average value R is not greater than the instantaneous value S (n-1), the time constant τ is set to a predetermined falling time constant τD (step S410).

Then, the CPU 22 calculates an instantaneous value S (n) based on [Equation 2], and ends this routine (step S411).

  Finally, the instantaneous value S (n) is output and displayed on the display panel 26 (step S412), and this routine is terminated.

  FIG. 5 is a detailed flowchart of the first history value calculation routine that the CPU 22 executes in step S35 of the instruction program, and includes N instantaneous values S (1), S (2)... S (N). The case where the peak value is calculated as the history value is shown.

  First, the CPU 22 initializes the peak value P to “0” (step S51), and initializes an index n for counting instantaneous values to “1” (step S52).

  The CPU 22 determines whether or not the peak value P is less than the instantaneous value S (n) (step S53). When it is determined that the peak value P is less than the instantaneous value S (n), the peak value P is instantaneously determined. Replace with the value S (n) (step S54). Note that when the CPU 22 determines that the peak value P is equal to or greater than the instantaneous value S (n), the CPU 22 bypasses the process of step S54.

  The CPU 22 determines whether or not the index n has reached the required number of instantaneous values N (step S55). When it is determined that the index n has not reached the required number of instantaneous values N, the index n is incremented ( Step S56) and the process returns to step S53.

  On the other hand, when the CPU 22 determines that the index n has reached the required number N of instantaneous values, this routine is terminated. As a result, the maximum value of the N instantaneous values is stored in the peak value P.

  When calculating the instantaneous value every 1024 samples and displaying the peak value P for the past 61.44 seconds in 20 display windows, a = 46.875, T = 61.44, M = 20, N = 144.

  FIG. 6 is a detailed flowchart of the history value storage routine executed by the CPU 22 in step S36 of the instruction program. In this routine, M history values are stored in the history value storage matrix Q, but each time a new history value is stored, a process of deleting the oldest history value in terms of time is performed.

  First, the CPU 22 initializes an index m for identifying a history value to “M” (step S61). Here, it is assumed that the history value Q (m) having a smaller index m value is a new history value in terms of time.

  Next, the CPU 22 replaces the (m−1) th history value Q (m−1) with the mth history value Q (m) (step S62), and determines whether or not the index m is “2”. Is determined (step S63).

  When determining that the index m is not “2”, the CPU 22 decrements the index m (step S64), and returns to the process of step S62.

  When determining that the index m is “2”, the CPU 22 replaces Q (1) with the peak value P calculated by the history value calculation routine, and ends this routine.

  FIG. 7 is a detailed flowchart of the display routine executed by the CPU 22 in step S37 of the instruction program. First, an index m for identifying a history value is initialized to “1” (step S71).

  Next, the CPU 22 outputs the history value Q (m) (step S72), and determines whether or not the index m has reached the display number “M” (step S73).

  When determining that the index m has not reached “M”, the CPU 22 increments the index m (step S74), and returns to the process of step S72.

  When determining that the index m has reached “M”, the CPU 22 ends this routine.

  FIG. 8 shows a display example on the display panel 26, in which the current instantaneous value is displayed on the right end and the history value is displayed on the left side of the current instantaneous value.

  In the case of the above example, the peak value that occurred about 3 seconds before the present on the left side of the current instantaneous value, and the peak value that occurred between about 3 seconds and 6 seconds before the left side. Is displayed. Similarly, the peak value is displayed at intervals of about 3 seconds, and the peak value generated between 58.37 seconds and 61.44 seconds is displayed at the leftmost end.

As described above, according to the first embodiment, in addition to the current instantaneous value, the peak value of the instantaneous value calculated in the past instantaneous value calculation period can be displayed as the history value.
(Second Embodiment)
FIG. 9 is a detailed flowchart of the second history value calculation routine executed by the CPU 22 in step S35 of the instruction program, and includes N instantaneous values S (1), S (2)... S (N). The case where an average value is calculated as a history value is shown.

  First, the CPU 22 initializes the integrated value P to “0” (step S81), and initializes an index n for counting instantaneous values to “1” (step S82).

  The CPU 22 accumulates the instantaneous values S (n) (step S83), and determines whether or not the index n has reached the required number N of instantaneous values (step S84).

  When the CPU 22 determines that the index n has not reached the required number N of instantaneous values, the CPU 22 increments the index n (step S85) and returns to the process of step S83.

  On the other hand, when the CPU 22 determines that the index n has reached the required number N of instantaneous values, the CPU 22 calculates the average value P by dividing the integrated value P by the required number of instantaneous values N (step S86), and ends this routine. To do.

As described above, according to the second embodiment, in addition to the current instantaneous value, an average value of instantaneous values calculated in the past instantaneous value calculation period can be displayed as a history value.
(Third embodiment)
FIG. 10 is a detailed flowchart of the third history value calculation routine executed by the CPU 22 in step S35 of the instruction program, and includes N instantaneous values S (1), S (2)... S (N). The case where the percent time rate average value is calculated as the history value is shown. Here, an average value of a predetermined percentage is calculated from the larger of the N instantaneous values.

  First, the CPU 22 arranges the N instantaneous values S (1), S (2)... S (N) in descending order (step S91).

Next, the CPU 22 calculates a history value measurement number K that is an integer that is a predetermined percentage of the required number N of instantaneous values, for example, 5%, using [Equation 3] (step S92).

  Next, the CPU 22 initializes the integrated value P to “0” (step S93), and initializes an index n for counting history values to “1” (step S94).

  The CPU 22 accumulates the instantaneous values S (n) (step S95), and determines whether or not the index n has reached the history value measurement number K (step S96).

  When determining that the index n has not reached the history value measurement number K, the CPU 22 increments the index n (step S97) and returns to the process of step S95.

  On the other hand, when the CPU 22 determines that the index n has reached the history value measurement number K, the CPU 22 divides the integrated value P by K, calculates the percent time rate average value P (step S98), and ends this routine. To do.

  As described above, according to the third embodiment, in addition to the current instantaneous value, the percent time rate average value of the instantaneous value calculated in the past instantaneous value calculation period can be displayed as the history value.

  In the first to third embodiments, the history values are displayed at equal time intervals. However, the history values are displayed at unequal time intervals such as increasing the time interval as the distance from the current value increases. It may be displayed. In this case, a display value may be extracted according to a predetermined rule from a history value storage matrix that stores history values Q (m) at equal time intervals.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to a sound signal VU value indicating device has been described. However, it is obvious that the present invention can be applied to a sound signal loudness or a loudness level indicating device, or a signal level changing device that changes every moment. It is.

  As described above, the indicating device according to the present invention has an effect that the history of the indicating value can be displayed, and is effective as a signal level indicating device that changes every moment.

The block diagram of the instruction | indication apparatus in the 1st Embodiment of this invention The block diagram which shows the hardware constitutions of the indicating device which concerns on this invention Flowchart of instruction program executed by CPU of instruction device according to the present invention Detailed flowchart of an instantaneous value calculation routine executed by the CPU of the pointing device according to the present invention. Detailed flow chart of first history value calculation routine executed by CPU of pointing device according to the present invention Detailed flowchart of history value storage routine executed by CPU of pointing device according to the present invention Detailed flowchart of display routine executed by CPU of pointing device according to the present invention Figure showing a display example on the display panel Detailed flowchart of the second history value calculation routine executed by the CPU of the pointing device according to the present invention. Detailed flow chart of third history value calculation routine executed by CPU of pointing device according to the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Instruction apparatus 11 Acoustic signal reading means 12 Instantaneous value calculation means 13 History value calculation means 14 History value storage means 15 Display means 151 Instantaneous value display means 152 History value display means

Claims (6)

An acoustic signal reading means for reading an acoustic signal;
Instantaneous value calculating means for calculating an instantaneous value of the acoustic signal;
A history value calculating means for calculating a history value of the acoustic signal based on the instantaneous value;
History value storage means for storing the history value;
A pointing device including display means for displaying the instantaneous value and the history value side by side. The history value calculation means is
The pointing device according to claim 1, wherein a peak value of a predetermined number of the instantaneous values is calculated as the history value. The history value calculation means is
The pointing device according to claim 1, wherein an average value of a predetermined number of the instantaneous values is calculated as the history value. The history value calculation means is
The pointing device according to claim 1, wherein a percentage time rate average value of a predetermined number of the instantaneous values is calculated as the history value. The instantaneous value calculating means is
5. The unit according to claim 1, further comprising means for calculating an instantaneous VU value as the instantaneous value based on an average absolute value of a predetermined period of an acoustic signal or a mean square value of a predetermined period. Pointing device. On the computer,
An acoustic signal reading process for reading an acoustic signal;
An instantaneous value calculation process for calculating an instantaneous value of the acoustic signal;
A history value calculation process for calculating a history value of the acoustic signal based on the instantaneous value;
A history value storing process for storing the history value;
An instruction program for executing display processing for displaying the instantaneous value and the history value side by side.

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