JPH1139369A - Filter design supporting device/method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily and automatically design a filter without previously giving filter parameter. SOLUTION: A filter design supporting device 1 displays an input signal waveform against the variable filter 2 by the display device 3a of an interface 3. An operation member 3b receives the setting operation of a processing area. A coefficient generation part 4 generates a coefficient which is to be set in the variable filter 2. When a frequency area to be preserved is set in the frequency area waveform of an input signal, for example, the coefficient generate part 4 sequentially changes the coefficient which is set in the variable filter 2, obtains coefficient when only the frequency band which is set is outputted from the variable filter 2 and displays the output signal waveform of the variable filter 2 at that time on the display device 3a. When the output signal waveform displayed on the display device 3a satisfies the request of the operator and the termination of work is instructed, a control part outputs the coefficient which is finally decided to an outer device as a design value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a filter design support apparatus and method for supporting the design of a filter that performs noise removal, signal extraction, or signal conversion on an input signal.

[0002]

2. Description of the Related Art In order to design a filter for removing noise, extracting a signal or converting a signal from an input signal, it is necessary to determine various coefficients to be set in the filter. As a method of determining the coefficients of the filter, a Fourier series expansion method, a window function method, a Chebyshev approximation method, and the like are conventionally known.

For example, a Remez algorithm for calculating the best Chebyshev approximation based on a predetermined filter parameter such as a cutoff frequency, or an adaptive method for learning filter coefficients from an input signal and an ideal output signal or a pure noise signal. Filter technology also exists.

[0004]

However, in order to design a filter using the conventional calculation method, it is necessary to determine the allowable deviation of the passband, the flat characteristic, the attenuation of the stopband, the cutoff frequency and the stopband frequency. The user has to provide an accurate value of the filter parameter in advance, and has not been able to assist the task of determining the filter parameter to facilitate the operation.

Further, in order to design a filter using an adaptive filter, it is necessary for a user to prepare an ideal output signal or a pure noise signal and supply the signal to the adaptive filter. In the case of, a filter cannot be designed using an adaptive filter.

SUMMARY OF THE INVENTION It is an object of the present invention to set and input the characteristics of an output signal in a filter so that filter parameters indispensable for the design of the filter are automatically determined. It is an object of the present invention to provide a filter design support apparatus and a filter design support method that can automatically design a filter.

[0007]

According to the first and twelfth aspects of the present invention, input signal information or output signal information in a variable filter capable of changing a set value of a coefficient is displayed, and a variable filter is displayed in the displayed signal information. And receiving a setting input of processing information relating to a change of a coefficient to be set in the variable filter, and generating a coefficient to be set in the variable filter based on the signal information and the processing information.

According to the first and twelfth aspects of the present invention, when processing information is set and input in the displayed signal information, a coefficient generated based on the signal information and the processing information is set in the variable filter. Here, the signal information refers to a time-series waveform or a frequency-domain waveform of the signal, a characteristic amount of the signal, or the like. Further, the processing information refers to signal emphasis, deletion, change, and the like. Therefore, the coefficient to be set in the variable filter is automatically generated only by setting and inputting processing information such as emphasis, deletion or change in the waveform or the like of the input signal or output signal in the variable filter. The required filter design is completed without inputting filter parameters such as flatness characteristics, stopband attenuation, cutoff frequency and stopband frequency.

According to the second and thirteenth aspects of the invention, a time-series waveform of an input signal or an output signal in the variable filter is displayed, and a modified input of the displayed time-series waveform is received.

According to the second and thirteenth aspects of the present invention, a time-series waveform of an input signal or an output signal of a variable filter being displayed is input in a modified manner to output a time-series waveform after the deformation. The coefficients to be set in the filter are automatically generated.

The invention according to claims 3 and 14 is characterized in that a waveform of an input signal or an output signal in the variable filter is displayed, and a setting input of a region to be processed in the displayed signal waveform is received.

According to the third and fourteenth aspects of the present invention, a variable filter is used to perform processing such as emphasis, deletion, or change on an area set and input in an input signal waveform or an output signal waveform of a variable filter being displayed. The coefficients to be set in the filter are automatically generated.

According to a fourth aspect of the present invention, a time-series waveform of an input signal or an output signal in a variable filter is displayed, and a setting input of a time range to be processed in the time-series waveform is received.

According to the fourth and fifteenth aspects of the present invention, the coefficients to be set in the variable filter in order to execute processing such as emphasis, deletion or change in the time range set and input in the displayed time-series waveform. Is automatically generated.

[0015] The invention according to claims 5 and 16 is characterized in that a frequency domain waveform of an input signal or an output signal in a variable filter is displayed, and a setting input of a frequency range to be processed in the frequency domain waveform is received.

According to the fifth and sixteenth aspects of the present invention, the coefficients to be set in the variable filter in order to execute processing such as emphasis, deletion or change in the frequency range set and input in the displayed frequency domain waveform. Is automatically generated.

According to the present invention, a time series waveform or a frequency domain waveform of an input signal or an output signal in a variable filter is displayed, and a single or a plurality of time series waveforms or frequency domain waveforms being displayed are displayed. Accepts an instruction input in the time domain or frequency domain and displays the input partial or multiple partial frequency domain waveforms in the time domain or the partial or time series waveform in the single or multiple frequency domains The present invention is characterized in that a selection input of validity or invalidity of a frequency domain waveform or a partial time series waveform is received.

In the inventions described in claims 6 and 17, when a time domain or a frequency domain is designated and input in the time series waveform or the frequency domain waveform being displayed, a partial frequency domain waveform for the designated time domain, or The partial time-series waveform for the frequency range for which the instruction has been input is displayed. Therefore, the processing contents of the filter can be determined based on the characteristics of both the time-series waveform and the frequency-domain waveform for the specified area. In particular, when a plurality of areas are specified, the area to be processed is different from the area to be processed. The processing content of the filter can be determined while confirming the independence and the separability from the region.

According to the present invention, a time series waveform or a frequency domain waveform of an input signal or an output signal in the variable filter is displayed, and a single or a plurality of time series waveforms or frequency domain waveforms being displayed are displayed. Extract the time domain or frequency domain, and display the extracted single or multiple time domain partial frequency domain waveforms, or display the single or multiple frequency domain partial time series waveforms, and display the partial frequency domain waveform or The present invention is characterized in that selection input of validity or invalidity of a partial time series waveform is received.

In the inventions described in claims 7 and 18, the characteristic region in the time-series waveform or the frequency-domain waveform being displayed is automatically extracted, and the extracted partial frequency-domain waveform or time-domain waveform in the time domain is extracted. A partial time-series waveform for the frequency range is displayed. Therefore, the processing content of the filter is determined based on the characteristics of both the time-series waveform and the frequency domain waveform, and the processing content of the filter is determined based on confirmation of independence and separability between the area to be processed and other areas. Can be facilitated.

According to the eighth and 19th aspects of the present invention, a plurality of partial frequency domain waveforms or partial time series waveforms being displayed can be selected and inputted, and the selectively input partial frequency domain waveform or partial time series waveform can be received. A partial frequency domain waveform or a partial time-series waveform having the same characteristics as the waveform is highlighted.

According to the eighth and nineteenth aspects of the present invention, it is easy to confirm the partial waveforms having the same characteristics as those of the partial waveforms selected and inputted in the plurality of partial frequency domain waveforms or partial time series waveforms being displayed. This makes it easier to confirm the independence and separability between the area to be processed and other areas.

According to the ninth and twentieth aspects of the present invention, the time series waveform of a specific time region set and input in the time series waveform of the input signal or the output signal in the variable filter being displayed is analyzed, and the analysis result is obtained. It is characterized by displaying.

According to the ninth and twentieth aspects of the present invention, an analysis result for a specific time zone set and input in the displayed time-series waveform is displayed. Therefore, it is possible to determine the processing content of the filter in a specific time range with reference to the analysis result.

According to the present invention, the time series waveform of the input signal or the output signal in the variable filter is displayed, the characteristic points of the time series waveform of the output signal are extracted, and the time series waveform of the output signal is extracted. The trajectory of the extracted feature point before and after the coefficient change is displayed.

According to the tenth and twenty-first aspects of the present invention, the trajectory of the characteristic points extracted in the displayed time-series waveform is displayed before and after the change of the coefficient set in the variable filter. Therefore, the processing content of the filter can be determined with reference to the variation state of each feature point in the time-series waveform due to the change in the setting of the coefficient of the variable filter.

According to the present invention, the input signal information in the variable filter capable of changing the setting contents of the coefficient is displayed, and the setting input of the processing area to be processed in the displayed signal information is received. A list of a plurality of output states of the variable filter for the processing region when a plurality of different coefficients are sequentially and individually set,
A selection input of a single output state to be validated among a plurality of output states being displayed is received, and a coefficient corresponding to the selected output state is output.

In the inventions described in claims 11 and 22, a plurality of output states when a plurality of mutually different coefficients are sequentially and individually set in the variable filter in the time range set and inputted in the displayed time-series waveform are displayed. Are listed,
By selecting one of the displayed output states, a coefficient to be set in the variable filter to obtain a desired output state is determined. Therefore, the operation of determining the coefficient of the filter for obtaining the desired output state is shortened.

[0029]

FIG. 1 is a block diagram showing the configuration of a filter design support apparatus according to an embodiment of the present invention. The filter design support device 1 includes a variable filter 2, an interface unit 3, and a coefficient generation unit 4. The variable filter 2 is, for example, a digital FIR filter that can change the set values of various coefficients, and performs processing such as noise removal, signal extraction, or signal conversion on an input signal in accordance with the set coefficients. And output the processed signal.
By changing the coefficient to be set, the function of the filter to be set is simulated. As the variable filter 2, another digital filter such as a digital IIR filter or an analog filter formed by an electric circuit can be used.

The interface unit 3 includes a display device 3a and an operation member 3b, displays signal information of an input signal or an output signal of the variable filter on the display device 3a, and inputs processing information by an operation of the operation member 3b by an operator. Accept the operation. As the display device 3a, an oscilloscope or a computer display including a display program can be used. As the operation member 3b, a pointing device such as a mouse, a keyboard, a touch panel attached to a screen of the display device 3a, or the like can be used. .

The coefficient generation unit 4 generates coefficients to be set in the variable filter 2 in order to execute a process related to the processing information input via the operation member 3b in the interface unit 3 on the input signal. The set coefficient is set in the variable filter 2. The coefficients generated by the coefficient generation unit 4 are output from the filter design support device 1 to the outside, and are used to create a filter that executes a process desired by the operator.

For example, in the filter design support apparatus according to the embodiment of the present invention, the display device 3a of the interface unit 3 displays a frequency domain waveform of an input signal and an output signal of the variable filter 2 in a waveform display unit. And an area setting unit for receiving the setting input of the frequency area to be processed in the frequency area waveform displayed by the operating member 3b on the display device 3a.

FIG. 2 is a flowchart showing a processing procedure of the filter design support apparatus according to the embodiment of the present invention. The filter design support device 1 includes a control unit (not shown). This control unit controls operations of the variable filter 2, the interface unit 3, and the coefficient generation unit 4 according to a program stored in advance. The control unit first displays the input signal waveform to the variable filter 2 on the display device 3a of the interface unit 3 (s1).
At b, an operation for setting the processing area by the operator is accepted (s2). At this time, the control unit moves the cursor position in the screen of the display device 3a according to the operation content of the operation member 3b, and also receives an instruction input of processing content such as saving or removing.

When the setting of the processing area and the instruction of the processing content are performed by the operator, the control section generates coefficients to be set in the variable filter 2 in the coefficient generating section 4 (s).
3). For example, when the operator sets a frequency range to be stored in the frequency domain waveform of the input signal, the coefficient generation unit 4 sequentially changes the coefficients set in the variable filter 2, and only the frequency range set by the operator changes from the variable filter 2. Find the coefficient at the time of output. The control unit displays the output signal waveform of the variable filter 2 at this time on the display device 3a (s
4) The above s2 until the operator instructs the end of the work.
To s4 are repeatedly executed (s5). Display device 3
When the output signal waveform indicated by a satisfies the operator's request and the end of the work is instructed, the control unit outputs the finally determined coefficients as design values to the external device (s6).

As described in the second aspect, the filter design support device 1 can also receive, by the operation member 3b, a deformation input of the input signal waveform being displayed on the display device 3a by the operator. For example, the display device 3a displays the time-series waveform of the input signal, accepts a moving point instruction operation and a moving point displacement operation in the displayed time-series waveform, and transforms the waveform into a waveform including the moving point after the displacement. Display on the display device 3a. In this way, by enabling the waveform being displayed to be deformed by operating the operation member 3b, it is possible to very easily input an instruction such as a process of emphasizing a characteristic portion in the input signal waveform. In this case,
By displaying both the input signal waveform and the deformed waveform in different display modes, for example, by changing the display color, it is possible to easily check the deformed state.

FIGS. 3 and 4 show examples of display screens on the display device of the filter design support apparatus according to the embodiments of the present invention.
According to the invention described in claim 4, a time-series waveform of the input signal is displayed on the display screen of the display device 3a as shown in FIG. 3, and the time regions 13a to 13c to be smoothed are operated by operating the operation member 3b. It is displayed in a display color different from other areas. Further, in the invention described in claim 5, the display device 3a
The frequency domain waveform of the input signal is displayed on the display screen of FIG. 4 as shown in FIG. 4, and the frequency ranges 13d and 13e to be removed are displayed in a display color different from those of the other regions by operating the operation member 3b.

Time regions 13a to 13c in which the operator should operate the operation member 3b to perform the smoothing process in the state shown in FIG.
Is input, the control unit of the filter design support apparatus 1 operates the coefficient generation unit 4 to change variously the coefficients of the variable filter 2 and smoothes the time-series waveforms in the time ranges 13a to 13c shown in FIG. Find the coefficient for When the operator operates the operation member 3b to set and input the frequency ranges 13d and 13e to be removed in the state shown in FIG. 4, the control unit of the filter design support apparatus 1 operates the coefficient generation unit 4 to change the frequency range. The coefficient of the filter 2 is variously changed, and a coefficient for preventing only the frequency components included in the frequency ranges 13d and 13e shown in FIG. That is, in the example shown in FIG. 4, a band-pass filter that allows only the frequency components in the range between the frequency range 13d and the frequency range 13e in the input signal to pass is designed.

FIG. 5 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention. Filter design support device 21 according to this embodiment
Is provided with an interface unit 23 in place of the interface unit 3 of the filter design support apparatus 1 shown in FIG. 1, and a coefficient storage unit 24 and a coefficient output unit 25 are added. The interface unit 23 includes an input waveform display unit 23a, a partial waveform display unit 23b, an area setting unit 23c, and a partial waveform selection unit 23d.

The input waveform display section 23a has a variable filter 2
A time-series waveform or a frequency-domain waveform of the input signal corresponding to. The partial waveform display unit 23b displays a partial frequency domain waveform in the time domain specified in the time series waveform of the input signal or a partial time series waveform in the frequency domain specified in the frequency domain waveform of the input signal. Area setting unit 23c
Receives a setting input of a single or a plurality of time ranges or a single or a plurality of frequency ranges in which processing is to be performed on a time-series waveform or a frequency-domain waveform of an input signal displayed by the input waveform display unit 23a. Partial waveform selection unit 23d
Accepts a selection input to enable or disable each of the single or multiple partial waveforms displayed by the partial waveform display unit 23b.

The coefficient storage unit 24 includes a partial waveform display unit 23b
Each of the coefficient groups to be set in the variable filter 2 in order to pass each of the single or plural partial waveforms indicated by. The coefficient output unit 25 includes a partial waveform selection unit 23
The coefficient for the partial waveform validated by the selection input in d is read from the coefficient storage unit 24 and output to an external device.

FIG. 6 is a flowchart showing a processing procedure executed by the control unit of the filter design support apparatus according to the embodiment of the present invention. FIG. 7 is a diagram showing an example of a display screen in the interface unit 23 of the filter design support device 21. The filter design support apparatus 21 shown in FIG. 6 is configured so that the variable filter 2, the interface unit 23,
A control unit (not shown) for controlling the operations of the coefficient generation unit 4, the coefficient storage unit 24, and the coefficient output unit is provided.

The control section first displays the input signal waveform for the variable filter via the input waveform display section 23a of the interface section 23 (s11), and the area setting section 23c
In step (s12), an operation of setting one or a plurality of processing areas by the operator is accepted. For example, as shown in FIG. 7A, when the input waveform display unit 23a displays the time-series waveform of the input signal on the input waveform unit 26a of the display screen 26, the time set by the operator by operating the region setting unit 23c. The areas 27a to 27d are displayed on the input waveform section 26a. Also, as shown in FIG. 7B, the input waveform display unit 2
When 3a displays the frequency domain waveform of the input signal on the input waveform section 26c of the display screen 26, the frequency ranges 29a to 29d set by the operator by operating the area setting section 23c are displayed on the input waveform section 26c.

When the processing area is set by the operator, the control section displays the waveform of the processing area set in the input signal on the partial waveform display section 23b (s1).
3). For example, as shown in FIG. 7A, when the input waveform display unit 23a displays the time-series waveform of the input signal on the input waveform unit 26a of the display screen 26, as shown in FIG. Time range 27a-2 set at 26a
7d, the partial frequency domain waveforms 28a to 28d of characteristic waveforms are displayed on the partial waveform portion 26b of the display screen 26.
To be displayed. 7B, when the input waveform display unit 23a displays the frequency domain waveform of the input signal on the input waveform unit 26c of the display screen 26, the frequency range set by the input waveform unit 26c is used. The partial time-series waveforms 30a to 30d of the input signals 29a to 29d are displayed on the partial waveform portion 26d of the display screen 26.

At this time, the control unit causes the coefficient generation unit 4 to
In order to allow only the processing regions set in the input signal to pass through the variable filter 2, each coefficient group to be set in the variable filter 2 is obtained (s14), and each obtained coefficient group is stored in the coefficient storage unit 24. Yes (s1
5). For example, in the example shown in FIG. 7A, only each of the partial frequency domain waveforms 28a to 28d is
Each of the coefficient groups to be set in the variable filter 2 in order to pass through the variable filter 2 is obtained and stored in the coefficient storage unit 24. Also,
In the example shown in FIG. 7B, in the output waveform of the variable filter 2, each of the coefficient groups to be set in the variable filter 2 in order to save only each of the partial time-series waveforms 30a to 30d is obtained. To be stored.

In s14, the coefficient generator 4 sequentially changes the coefficients to be set in the variable filter 2, and outputs the coefficients when only the partial frequency domain waveforms 28a to 28d are output from the variable filter 2, or Time series waveforms 30a-3
A coefficient when only 0d is output from the variable filter 2 is obtained.

After that, the control section controls the partial waveform selecting section 23d.
In step (s16), the operator receives a valid or invalid selection input for each of the partial waveforms.
For example, in the example shown in FIG. 7A, the operator selects whether or not to pass each of the partial frequency domain waveforms 28a to 28d in the partial waveform section 26b of the display screen 26 through the variable filter 2. In the example shown in FIG. 7B, the operator operates the partial waveform portion 26 d of the display screen 26.
In, it is selected whether or not each of the partial time-series waveforms 30a to 30d is to be stored in the output waveform.

When the selection input for each of the partial waveforms by the operator is completed, the control unit reads out the coefficient group for the selected partial waveform from the coefficient storage unit 24 and sets the coefficient group in the variable filter 2 (s17). The control unit is
The output signal of the variable filter 2 after setting the coefficient read from the coefficient storage unit 24 is input to the input waveform display unit 23a.
Input waveform section 26a or 26c of display screen 26 via
Next, a display mode different from that of the input signal is displayed (s18).
Next, the control unit waits for an input of an instruction to end the operation by the operator (s19). When the output signal waveform displayed on the display device 26 satisfies the operator's request and the end of the operation is instructed, the control unit finally determines the operation. The coefficient set in the variable filter 2 is output as a design value to an external device via the coefficient output unit 25 (s20).

With the above processing, according to the filter setting support apparatus and the filter design support method according to this embodiment, each of the processing areas set by the operator in the input signal is different from the waveform used for setting the processing area. The input signal waveform is displayed in a display mode. Therefore, the operator can confirm the input signal with a plurality of waveforms having different display forms, and can determine whether each processing area is valid or invalid very easily.

The input waveform section 26 shown in FIG.
a and the partial waveform portion 26b, and the input waveform portion c and the partial waveform portion 26d shown in FIG. 7B may be simultaneously displayed on the display screen 26. In this case, the time series waveform and the frequency domain waveform may be displayed separately on the left and right sides of the display screen 26.

FIG. 8 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention. This filter design support apparatus 31 is a method for producing a filter.
The filter design support method according to the embodiment of the invention described in (1) is executed. The filter design support device 31 includes an interface unit 33 instead of the interface unit 23 of the filter design support device 21 shown in FIG. The interface unit 33 includes a region extracting unit 33c instead of the region setting unit 23c of the interface unit 23. The region extraction unit 33c automatically sets a characteristic portion in the input signal waveform to the variable filter 2 as a processing region by referring to, for example, the inclination angle of the input signal waveform.

According to the filter design support apparatus 31 of this embodiment, it is not necessary for the operator to input the setting of the processing area in the input signal, and the design work of the filter can be simplified.

FIG. 9 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention. This filter design support device 41 is the present invention.
The filter design support method according to the embodiment of the invention described in (1) is executed. The filter design support device 41 is provided with an interface unit 43 instead of the interface unit 23 of the filter design support device 21 shown in FIG. The interface unit 43 includes a feature extraction unit 43e in addition to the configuration of the interface unit 23. Feature extraction unit 43
e extracts and stores a characteristic waveform in each partial waveform of the processing region set by the operator via the region setting unit 23c, and selects a selection corresponding to the partial waveform selected by the operator in the partial waveform selection unit 23d. The processing area and another processing area having the same characteristic waveform as the selected processing area are highlighted in the input waveform.

For example, as shown in FIG. 7A, the control unit of the filter design support apparatus 41 uses the input waveform unit 26a of the display screen 26 to display the time-series waveform of the input signal.
6, partial frequency domain waveforms 28 a to 28 d for each of the time ranges 27 a to 27 d set by the operator by the processing of s 11 to s 13 in FIG. 6 are displayed on the partial waveform part 26 b of the display screen 26, Extraction unit 4
3e, characteristic waveforms are extracted and stored in each of the partial frequency domain waveforms 28a to 28d. Thereafter, when the operator selects any one of the partial waveforms as the selected partial waveform by the partial waveform selection unit 23d, the control unit outputs the characteristic waveform in the selection processing area corresponding to the selected partial waveform via the feature extraction unit 43e. Another processing region having the same characteristic waveform is searched, and all of the processing regions having the same characteristic waveform are highlighted and displayed on the input waveform part 26a of the display screen 26.

According to the above processing, according to the filter design support apparatus 41 of this embodiment, processing areas having the same characteristic waveform are simultaneously displayed in a plurality of processing areas set by the operator in the input waveform. . Therefore, for example, when selecting a frequency region to be removed from the input signal by selecting any of the partial frequency region waveforms 28a to 28d displayed on the partial waveform portion 26b of the display screen 26, the operator needs to input the input signal. It is possible to confirm in advance which processing region is to be processed in the time-series waveform of the above, and it is possible to easily determine whether or not the selection of the partial frequency regions 28a to 28d is appropriate.

As shown in FIG. 7B, the waveform display unit 23
The above-described processing can be similarly performed when a displays the frequency domain waveform of the input signal on the input waveform section 26a of the display screen 26. Also, the interface unit 4
The above-described processing can be similarly performed when an area extracting unit 33c is provided instead of the third area setting unit 23c to automatically set a processing area in an input signal.

FIG. 10 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention. The filter design support device 51 is provided by the interface unit 2 of the filter design support device 21 shown in FIG.
An interface unit 53 is provided in place of the interface unit 3.
The interface unit 53 includes a candidate waveform display unit 53b and a candidate waveform selection unit 53d instead of the partial waveform display unit 23b and the partial waveform selection unit 23d of the interface unit 23. The candidate waveform display unit 53b displays a plurality of waveforms of the output signal of the variable filter 2 for the processing area set by the operator via the area setting unit 23c in the input signal. The candidate waveform selection unit 53d receives a selection input of any one of the plurality of output signal waveforms displayed by the candidate waveform display unit 53b.

FIG. 11 is a flowchart showing a processing procedure of the control unit of the filter design support apparatus according to the eleventh embodiment of the present invention. FIG. 12 is a diagram showing an example of a display screen in the filter design support apparatus. The control unit of the filter design support device 51 executes the filter design support method according to the embodiment of the present invention. The control unit first displays the input signal waveform to the variable filter 2 on the waveform display unit 23a of the interface unit 53 (s21), and accepts the operation of setting the processing area by the operator in the area setting unit 23c (s22). At this time, the control unit moves the cursor position in the display screen 26 according to the operation content of the area setting unit 23c, and displays the set area.

When the processing area is set by the operator, the control unit causes the coefficient generation unit 4 to
Are sequentially set (s23), and the output waveform of the variable filter 2 in which each of the plurality of coefficients is set is displayed via the candidate waveform display unit 53b (s24). For example,
When the operator sets a time range to be smoothed in the time-series waveform of the input signal, the coefficient generation unit 4 sequentially changes the coefficients set in the variable filter 2 and sets the coefficients in the variable filter 2. The candidate waveform display unit 53b displays the time-domain waveform set by the operator in the output waveform of the variable filter 2 when each coefficient is set as a candidate waveform in the candidate waveform unit 26e of the display screen 26 as shown in FIG. The selection is made possible by operating the handle 26j and displayed. At this time, the coefficient generation unit 4 stores in the coefficient storage unit 24 all the coefficients that have been sequentially changed and set in the variable filter 2.

After that, the control section selects the candidate waveform selecting section 53d.
The selection of a single candidate waveform by the operator is accepted (s25), and the time-series waveform of the output signal of the variable filter 2 when the coefficient corresponding to the candidate waveform selected by the operator is set in the variable filter 2 is displayed on the display screen 26. It is displayed in a display mode different from that of the input signal (s26). In this state, the control unit waits for an input of an instruction to end the operation by the operator (s27), and the time-series waveform of the output signal of the variable filter 2 satisfies the operator's request, and when the operator instructs the end of the operation. Then, the coefficient set in the variable filter 2 is output to the external device via the coefficient output unit 25 (s28).

According to the above processing, according to the filter setting support apparatus 51 of this embodiment, each variable when the set value of the coefficient is variously changed in the time range set by the operator in the time series waveform of the input signal. Filter 2
Are displayed as a plurality of candidate waveforms. Therefore, the operator can select a time-series waveform of a desired output signal from a plurality of candidate waveforms, thereby determining coefficients to be set in the filter in order to obtain the output signal. Can be performed very easily and in a short time.

As shown in FIG. 13, instead of a plurality of candidate waveforms, one of a plurality of candidate output states represented by qualitative words such as "flatten" and "emphasize" can be selected. Alternatively, the candidate state unit 26f may be displayed.

FIG. 14 is a block diagram showing a configuration of a filter design support apparatus according to the ninth embodiment of the present invention. This filter design support device 61 is
The filter design support method according to the embodiment of the present invention described in FIG. 1 is provided with an interface unit 63 instead of the interface unit 53 of the filter design support device 51 shown in FIG. The interface unit 63 includes a candidate waveform display unit 53b of the interface unit 53.
And an analysis result display unit 63 instead of the candidate waveform selection unit 53d.
b and a coefficient input section 63d, and further includes a waveform information analysis section 63e.

In the interface section 63, the waveform information analysis section 63e analyzes the waveform information of the processing area set by the operator via the area setting section 53a in the time series waveform of the input signal. The waveform information includes, for example, a maximum value, an average value, and a minimum value of the voltage and the frequency. The analysis result display unit 63b displays the analysis result of the waveform information by the waveform information analysis unit 63e, for example, on the analysis result unit 26g of the display screen 26 as shown in FIG. Coefficient input section 6
3d receives an input operation of a filter parameter and a coefficient to be set in the variable filter 2 by the operator.

The control unit of the filter design support apparatus 61 configured as described above displays the time-series waveform of the input signal on the display screen 26, and accepts the setting input of the processing area by the operator in the area setting unit 53a. The waveform information such as the maximum voltage is analyzed for the input processing area, and the analysis result is displayed on the display screen 26. Thereafter, the control unit accepts an input operation of a filter parameter and a coefficient by the operator in the coefficient input unit 63e.

According to the filter design support apparatus 61 described above, the operator can refer to the waveform information displayed on the display screen 26 to accurately determine the characteristics of the processing area in the time-series waveform of the input signal. It can be recognized, and filter parameters and coefficients can be easily set. The waveform information of the input signal can also be referred to when judging the suitability of the coefficient generated by the coefficient generation unit 4 of the filter design support device 61 or when changing the generated coefficient. Work can be performed easily.

FIG. 16 is a block diagram showing a configuration of a filter design support apparatus according to the tenth embodiment of the present invention. This filter design support device 71 executes the filter design support method according to the embodiment of the present invention, and replaces the interface unit 63 of the filter design support device 61 shown in FIG. 73. The interface unit 73 includes an input waveform display unit 73a, an output waveform display unit 73
b, a coefficient input unit 73d, a feature point extraction unit 73e, a feature point history storage unit 73f, and a feature point trajectory display unit 73g.

In the interface section 73, an input waveform display section 73a displays a time-series waveform of an input signal to the variable filter 2 on the display screen 26. The output waveform display / display unit 73b simultaneously displays the time-series waveform of the output signal of the variable filter 2 on the display screen 26 in a display mode different from that of the input signal waveform. The coefficient input unit 73d receives an input operation of a filter parameter and a coefficient to be set in the variable filter 2 by an operator. The feature point extracting unit 73e extracts feature points such as peaks and valleys of the time-series waveform of the input signal. The feature point history storage unit 73f sequentially stores the positions of the feature points in the time-series waveform of the output signal of the variable filter 2 when the coefficient or the like set in the variable filter 2 is changed. The feature point trajectory display unit 73g displays the trajectory of the displacement of the feature point before and after the change of the coefficient or the like set in the variable filter 2 on the display screen
6 is displayed.

The control unit of the filter design support apparatus 71 configured as described above displays the time series waveform of the input signal on the display screen 26, and the feature point extraction unit 73e determines the feature points in the time series waveform of the input signal. Extract. Next, the control unit receives an input operation of a coefficient or the like set in the variable filter 2 by the operator in the coefficient input unit 73d,
The time-series waveform of the output signal of the variable filter 2 in which the coefficients and the like input through the coefficient input unit 73d are set is displayed on the display screen via the output waveform display unit 73b. At this time, the control unit extracts the position of the feature point extracted in the time-series waveform of the input signal in the time-series waveform of the output signal, stores the position in the feature-point history storage unit 73f, and stores the feature-point trajectory display unit 7
The trajectory of the displacement of the characteristic point, which is obtained by connecting the position of the characteristic point in the input signal waveform and the position of the characteristic point in the output signal waveform by 3g, is displayed on the history waveform part 26h of the display screen 26 as shown in FIG. 17, for example. . The control unit repeatedly executes extraction of a feature point position in an output signal waveform and display of a trajectory of a displacement of the feature point each time the operator changes and inputs a coefficient or the like.

According to the filter design support apparatus 71 described above, the operator refers to the trajectory of the feature point displayed on the display screen 26 to set the coefficients and the like for the variable filter. It is possible to grasp the deformation state of the waveform of the portion including the feature point, the presence / absence of the interlocking of a plurality of feature points, and the interlocking state, and easily set the coefficient for obtaining a desired output signal waveform. it can.

The feature points in the input signal waveform or the output signal waveform displayed on the display screen 26 can be moved by the operator by operating the handle 26i on the display screen 26, and include the moved feature points. The filter design support device 71 may generate variables to be set in the variable filter 2 to realize the output signal waveform. In this case, the operator can easily perform a setting operation of a coefficient or the like for realizing a desired output signal waveform while visually confirming a moving state of another feature point linked to the moved feature point.

[0071]

According to the first and twelfth aspects of the present invention, a variable filter should be set only by inputting a process such as emphasis, deletion or change in a waveform of an input signal or an output signal in the variable filter. Coefficients are generated, and filters are easily designed to obtain the desired output signal waveform without inputting filter parameters such as the tolerance of passband, flatness characteristics, attenuation of stopband, cutoff frequency and stopband frequency. can do.

According to the second and thirteenth aspects of the present invention, a time-series waveform of an input signal or an output signal of a variable filter being displayed is subjected to a deformation input to realize a time-series waveform after the deformation. A coefficient to be set in the variable filter is generated, and a filter for obtaining a desired output signal waveform without inputting a filter parameter can be easily designed.

According to the third and fourteenth aspects of the present invention, it is possible to execute processing such as emphasis, deletion, or change on an area set and input in the input signal waveform or output signal waveform of the variable filter being displayed. A coefficient to be set in the variable filter is generated, and a filter for obtaining a desired output signal waveform without inputting a filter parameter can be easily designed.

According to the fourth and fifteenth aspects of the present invention, the variable filter should be set in order to execute processing such as emphasis, deletion, or change in the time zone set and input in the displayed time-series waveform. The coefficients are generated, and a filter for obtaining a desired output signal waveform without inputting filter parameters can be easily designed.

According to the fifth and sixteenth aspects of the present invention, a variable filter should be set in order to execute processing such as emphasis, deletion, or change in a frequency range set and input in a displayed frequency domain waveform. The coefficients are generated, and a filter for obtaining a desired output signal waveform without inputting filter parameters can be easily designed.

According to the inventions set forth in claims 6 and 17, it is possible to determine the processing to be executed by the filter on the designated area based on the characteristics of both the time-series waveform and the frequency-domain waveform. When a plurality of areas are designated, the processing content of the filter can be easily determined while checking the independence and the separability between the area to be processed and other areas.

According to the seventh and eighteenth aspects of the present invention, the processing content of the filter is determined based on the characteristics of both the time-series waveform and the frequency-domain waveform, and the difference between the area to be processed and another area is determined. It is possible to easily determine the processing content of the filter based on confirmation of independence and separability.

According to the eighth and nineteenth aspects of the present invention, it is easy to confirm partial waveforms having the same characteristics as those of the partial waveforms selected and input in a plurality of partial frequency domain waveforms or partial time series waveforms being displayed. Thus, it becomes easier to confirm the independence and the separability between the region to be processed in the filter and another region.

According to the ninth and twentieth aspects of the present invention, it is possible to easily determine the processing content of the filter in a specific time range with reference to the analysis result.

According to the tenth and twenty-first aspects of the present invention, it is possible to easily set the processing contents of the filter while referring to the variation state of each characteristic point in the time-series waveform due to the change of the setting of the variable filter coefficient. it can.

According to the eleventh and twenty-second aspects of the present invention, by selecting one of a plurality of output states displayed in a list, the operation of determining the coefficient of the filter for obtaining the desired output state can be extremely shortened. Can be timed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure of a filter design support apparatus according to an embodiment of the present invention.

FIG. 3 is a diagram showing an example of a display screen on a display device of the filter design support apparatus according to the embodiment of the present invention.

FIG. 4 is a diagram showing an example of a display screen on a display device of the filter design support apparatus according to the embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 6 is a flowchart showing a processing procedure executed by a control unit of the filter design support apparatus.

FIG. 7 is a diagram showing an example of a display screen in an interface unit of the filter design support device.

FIG. 8 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 11 is a flowchart illustrating a processing procedure of a control unit of the filter design support apparatus.

FIG. 12 is a diagram showing an example of a display screen in the filter design support device.

FIG. 13 is a diagram showing an example of a display screen in a filter design support apparatus according to another embodiment of the present invention.

FIG. 14 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 15 is a diagram showing an example of a display screen in the filter design support device.

FIG. 16 is a block diagram showing a configuration of a filter design support apparatus according to an embodiment of the present invention.

FIG. 17 is a diagram showing an example of a display screen in the filter design support apparatus.

[Explanation of symbols]

 1-Filter design support device 2-Variable filter 3-Interface unit 4-Coefficient generation unit

Claims (22)

[Claims] 1. A variable filter capable of changing the setting contents of a coefficient, displaying input signal information or output signal information in the variable filter, and processing information relating to a change of a coefficient set in the variable filter in the signal information being displayed. A filter design support device, comprising: an interface unit for receiving a setting input; and a parameter generation unit for generating a coefficient to be given to a variable filter based on signal information and processing information. 2. The apparatus according to claim 1, wherein the interface unit receives a waveform display unit for displaying a time-series waveform of an input signal or an output signal of the variable filter, and receives a modified input of the time-series waveform displayed on the waveform display unit as the processing information. A transformation input unit,
The filter design support apparatus according to claim 1, further comprising: 3. A waveform display unit for displaying a waveform of an input signal or an output signal in a variable filter, and an area setting for receiving an input for setting a region to be processed in a signal waveform displayed on the waveform display unit. The filter design support apparatus according to claim 1, further comprising: a unit. 4. The waveform display unit according to claim 3, wherein a time-series waveform of an input signal or an output signal in the variable filter is displayed, and the area setting unit receives a time-domain setting input to be processed in the time-series waveform. Filter design support equipment. 5. The frequency display device according to claim 3, wherein the waveform display unit displays a frequency domain waveform of an input signal or an output signal in the variable filter, and the domain setting unit receives a setting input of a frequency range to be processed in the frequency domain waveform. Filter design support equipment. 6. The waveform display unit displays a time-series waveform or a frequency-domain waveform of an input signal or an output signal in a variable filter, and the waveform display unit displays one or more time-series waveforms in the time-series waveform or the frequency-domain waveform. Input unit for receiving an instruction input of a frequency range or a frequency range, and a partial frequency domain waveform of a single or a plurality of time ranges or a partial time-series waveform of a single or a plurality of frequency ranges input in the instruction input unit. 4. A filter according to claim 3, further comprising: a partial waveform display section for displaying, wherein the area setting section receives a valid or invalid selection input of a partial frequency domain waveform or a partial time series waveform displayed by the partial waveform display section. Design support equipment. 7. The waveform display section displays a time-series waveform or a frequency-domain waveform of an input signal or an output signal in a variable filter, and the waveform display section displays one or more time-series waveforms in the time-series waveform or the frequency-domain waveform. Extraction unit for extracting a frequency band or a frequency range, and a partial waveform display unit for displaying a partial frequency domain waveform of a single or a plurality of time ranges extracted in the extraction unit, or a partial time series waveform of a single or a plurality of frequency ranges The filter design support device according to claim 3, wherein the region setting unit receives a valid or invalid selection input of a partial frequency region waveform or a partial time-series waveform displayed by a partial waveform display unit. 8. The partial waveform display unit receives a selection input of any of a plurality of partial frequency domain waveforms or partial time series waveforms being displayed, and displays the selected partial frequency domain waveform or partial time series waveform. 8. The filter design support apparatus according to claim 6, wherein a partial frequency domain waveform or a partial time series waveform having the same characteristic as the characteristic is highlighted. 9. The waveform display section includes a waveform analysis section for analyzing a time-series waveform in a time domain set and input in the area setting section, and an analysis result display section for displaying an analysis result of the waveform analysis section. The filter design support device according to claim 3. 10. A feature point extracting section for displaying a time series waveform of an input signal or an output signal in a variable filter, extracting a feature point of the time series waveform of an output signal, and a coefficient set in the variable filter. A feature point trajectory display unit that displays a trajectory of feature points before and after the change of the feature point.
10. The filter design support apparatus according to any one of 9. 11. A variable filter capable of changing setting contents of a coefficient, an input signal display section for displaying input signal information in the variable filter, and an area setting section for receiving a setting input of a processing area to be processed in the signal information being displayed. And a list of a plurality of output states of a variable filter for a processing area when a plurality of coefficients different from one another are sequentially set in the variable filter and a plurality of coefficients are sequentially set individually from the coefficient generator. An output state display unit, and an output state selection unit that receives a selection input of a single output state to be enabled among a plurality of output states displayed by the output state display unit,
A filter output unit that outputs a coefficient corresponding to the output state selected by the output state selection unit. 12. An input signal information or an output signal information of a variable filter capable of changing setting contents of a coefficient is displayed, and a setting input of processing information relating to a change of a coefficient to be set in the variable filter in the displayed signal information is received. ,
A filter design support method characterized by generating a coefficient to be given to a variable filter based on signal information and processing information. 13. The filter design support method according to claim 12, wherein a time-series waveform of an input signal or an output signal in the variable filter is displayed, and a modified input of the time-series waveform being displayed is received as the processing information. 14. The filter design support method according to claim 12, wherein a waveform of an input signal or an output signal in the variable filter is displayed, and a setting input of a region to be processed in the displayed signal waveform is received. 15. The filter design supporting method according to claim 14, wherein a time-series waveform of an input signal or an output signal in the variable filter is displayed, and a setting input of a time region to be processed in the time-series waveform is received. 16. A frequency domain waveform of an input signal or an output signal in a variable filter is displayed, and a setting input of a frequency range to be processed in the frequency domain waveform is received.
5. The filter design support method according to 4. 17. A time-series waveform or a frequency-domain waveform of an input signal or an output signal in a variable filter is displayed, and a single or a plurality of time-domain or frequency-domain instruction inputs are displayed in the displayed time-series waveform or the frequency-domain waveform. The partial frequency domain waveform in the single or multiple time domain that is received and instructed and input, or the partial time series waveform in the single or multiple frequency domains is displayed, and the displayed partial frequency domain waveform or partial time series waveform is displayed. Claim 1 which accepts selection input of validity or invalidity
5. The filter design support method according to 4. 18. A time series waveform or a frequency domain waveform of an input signal or an output signal in a variable filter is displayed, and a single or a plurality of time domains or frequency domains are extracted from the displayed time series waveform or the frequency domain waveform; Display the extracted single or multiple time-domain partial frequency domain waveforms or single or multiple frequency domain partial time-series waveforms, and enable or disable the displayed partial frequency domain waveform or partial time-series waveform. 15. The filter design support method according to claim 14, wherein a selection input is received. 19. A partial frequency domain waveform or a partial time series waveform being displayed is selected and any one of the partial frequency domain waveforms is received, and the selected partial frequency domain waveform or the partial time series waveform has the same characteristics as those of the selectively input partial frequency domain waveform or partial time series waveform. 19. A partial frequency domain waveform or a partial time series waveform is highlighted.
3. The filter design support method according to 1. 20. A time-series waveform of a specific time range set and input in a time-series waveform of an input signal or an output signal in a variable filter being displayed, and the analysis result is displayed. A filter design support method according to 21. A time series waveform of an input signal or an output signal in a variable filter is displayed, feature points of a time series waveform of an output signal are extracted, and a locus of feature points before and after a change in a coefficient set in the variable filter is displayed. The filter design support method according to any one of claims 14 to 20. 22. Display of input signal information in a variable filter capable of changing setting contents of coefficients, accepting a setting input of a processing area to be processed in the displayed signal information, and sequentially separating a plurality of mutually different coefficients into the variable filter. Lists the multiple output states of the variable filter for the processing area when set to, accepts a selection input of a single output state to be enabled among the multiple output states being displayed, and selects the selected output state And outputting a coefficient corresponding to the filter design.