JPH11237277A - Method and apparatus for frequency analysis and display as well as recording medium with recorded program for frequency analysis and display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily grasp a change in the frequency characteristic of a sound by simultaneously displaying not only a latest measured result but also a previous measured result regarding the frequency characteristic of the sound. SOLUTION: In a frequency analysis and display apparatus, a means 4 which performs a sampling operation measures a signal level indicating at which degree of intensity a frequency band is regarding a plurality of frequency bands contained in a sound source, and a means 6 which displays latest data displays, on a display device 7, data by its latest measurement. In addition, a means 10 which displays immediately preceding data displays, on the display device 7, immediately preceding data 7 which is retreated. Thereby, how the frequency characteristic of every band is changed with the passage of time can be grasped easily at a glance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in technology for measuring and displaying the frequency characteristics of sound, and more specifically, to simultaneously display not only the latest measurement result but also the previous measurement result. Thus, the change of the frequency characteristic can be easily grasped.

[0002]

2. Description of the Related Art A device for measuring what frequency components are contained in a sound and in what proportion is called a frequency analyzer. By incorporating this frequency analyzer into a car audio system or the like, measuring the signal level for each frequency band included in the audio source, and displaying the measurement result, that is, displaying the level, you can grasp the frequency characteristics of the music you are currently listening to. Therefore, it is easy to adjust the sound quality with the equalizer. In addition to the fact that the hearing is stimulated by the music, the visual sense is also stimulated by such a level display, so that the user's preference is satisfied.

It is to be noted that taking out a certain point in time flow and measuring the signal level is called sampling, and the point in time at which sampling is performed is called sampling point. In addition, the devices that perform the measurement and display the measurement results in this way, and that are used for them, are collectively referred to as “sprayers”.

[0004]

In the prior art, however, only the signal level at the latest sampling point is displayed for any band, and the display changes rapidly in real time. For this reason, there has been a problem that it is difficult to understand how the frequency characteristics have changed compared to the immediately preceding sampling time.

The present invention has been proposed in order to solve the above-mentioned problems of the prior art. The purpose of the present invention is to display not only the latest measurement result but also the previous measurement result at the same time, so that the frequency can be reduced. The purpose is to make it easy to grasp changes in characteristics.

[0006]

According to a first aspect of the present invention, there is provided a frequency analysis display device for measuring a signal level of each of a plurality of bands included in a given sound at regular intervals. And means for storing the measurement results, and means for simultaneously displaying the stored previous measurement results and the new measurement results. According to a fifth aspect of the present invention, there is provided a frequency analysis and display method, wherein the invention of the first aspect is grasped from the viewpoint of the method. The method includes a step of storing the result and a step of simultaneously displaying the stored previous measurement result and the new measurement result. According to a seventh aspect of the present invention, the invention of the first aspect is grasped from the viewpoint of a recording medium on which a computer program is recorded, and a frequency analysis display program for analyzing and displaying frequency characteristics of sound using a computer is recorded. On a recording medium, the program causes the computer to measure the signal level of each of a plurality of bands included in the given sound at regular intervals, store the measurement result, and store the stored previous measurement result and a new measurement result. It is characterized in that the measurement result is displayed simultaneously. According to the first, fifth and seventh aspects of the present invention, not only the latest measurement result but also the previous measurement result is displayed collectively, so that it is easy to see at a glance how the frequency characteristics of each band change with time. You can figure out.
In addition, by displaying not only the latest measurement result but also the previous measurement result at the same time, various complicated movements with ordered movement can be shown. For this reason, the visual stimulus is more effectively added to the auditory stimulus caused by the music itself, thereby greatly satisfying the user's preference.

According to a second aspect of the present invention, there is provided the frequency analysis display device according to the first aspect, further comprising means for selecting whether to display a previous measurement result. According to the second aspect of the present invention, the conventional display that displays only the latest measurement results and the display according to the present invention that displays both the latest and previous measurement results at the same time can be freely selected. The combined display becomes easy.

According to a third aspect of the present invention, in the frequency analysis display device according to the first or second aspect, the displaying means displays the previous measurement result and the new measurement result in a superimposed position at a shifted position. It is characterized by comprising. According to a sixth aspect of the present invention, the invention of the third aspect is grasped from the viewpoint of a method. In the frequency analysis display method according to the fifth aspect, the displaying step includes a step of displaying a previous measurement result and a new measurement result. It is characterized by being superimposed and displayed at a shifted position.

According to the third and sixth aspects of the present invention, the previous measurement result and the new measurement result are displayed twice with their positions shifted, so that the two can be compared easily to grasp the change of the frequency characteristic. become. In addition, since the frequency characteristics of the same sound source are displayed twice, the entire display is emphasized and easy to see, so that the recognizability is improved. Furthermore, the result of the previous measurement and the result of the new measurement are not
By overlapping and displaying the images at the shifted positions, the area used for the display can be reduced.

According to a fourth aspect of the present invention, in the frequency analysis display device according to any one of the first to third aspects, the displaying means displays the previous measurement result and the new measurement result in different colors. The display is configured to be displayed. According to the fourth aspect of the present invention, the previous measurement result is displayed in a certain color, and the new measurement result is displayed in another color, so that the two can be easily identified at a glance. In addition, by displaying the frequency characteristics, a plurality of colors show complicated movements, thereby further satisfying the user's preference.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. It is generally considered that each function of the present invention is realized by controlling a computer with software. In this case, a storage device such as a register, a memory, and an external storage device provided in the computer temporarily or permanently stores information in various formats. Then, the CPU adds processing such as processing and determination to the information according to the software, and further controls the order of the processing.

Further, software for controlling the computer is created by combining instructions corresponding to the claims described in the present application and the processing described in this specification, and the created software is assembled or compiled embedded software. By using such hardware resources as described above.

However, the above-described embodiment for realizing the present invention can be modified in various ways, for example, a ROM chip or a CD recording software for realizing the present invention.
-A recording medium such as a ROM is an aspect of the present invention by itself. Further, a part of the functions of the present invention can be realized by a physical electronic circuit such as an LSI.

For this reason, an embodiment of the present invention (hereinafter referred to as “the present embodiment”) will be described below by using virtual circuit blocks that realize the functions of the present invention. In each drawing used in the description, the description of the same or similar members as those described earlier is omitted.

[1. Configuration] FIG. 1 is a block diagram showing a rough hardware configuration of the present embodiment. In the present embodiment, the whole is an integrated car audio unit. As shown in this figure, a spectrum analyzer 11 for analyzing the frequency of an audio sound source, a CD 12 having a CD reproducing function, and a role of a radio receiver are provided. It has a TUNER unit 13 and a display unit 14 for displaying the operating state of the entire car audio, the result of frequency analysis, and the like. Further, the present embodiment includes a CPU 15 that controls these units 11 to 14.

FIG. 2 is a functional block diagram showing the configuration of the present embodiment from the viewpoint of what kind of functions are combined. That is, the individual parts shown in FIG. 2 correspond to the spectrum analyzer 11 and the display 1 in FIG.
4. It may be provided at any part of the CPU 15 or may be provided over two or more of these parts.

As shown in FIG. 2, this embodiment selects an input device 1, a means 2 for setting a sampling time, a means 3 for measuring a sampling time, a means 4 for sampling, and a display mode. Means 5, means 6 for displaying the latest data, means 8 for saving previous data 9, means 10 for displaying previous data 9, and display device 7 are provided.

The sampling means 4 is a means for measuring a signal level for each of a plurality of frequency bands included in a given sound source. The means 2 for setting the sampling time is means for setting the sampling time, that is, the time interval between the measurement of the signal level and the next measurement. The sampling time measuring means 3 is a means for measuring the set sampling time using a timer, a program loop structure, or the like. Means 5 for selecting a display mode is a means for selecting how to display the measurement result of the frequency component measured by the sampling means 4, and in particular, the latest measurement result as in the prior art. This is used to select whether to display only the measurement result or the previous (previous) measurement result according to the present invention.

Means 8 for saving the previous data
Is a means for storing a new measurement result measured by the sampling means 4 as data 9 immediately before to be displayed together with a newer measurement result to be measured next. Means 6 for displaying the latest data is:
A means for displaying the latest measurement result measured by the sampling means 4 on the display device 7. A means 10 for displaying data one time before is used to save the data 9 saved one time ago. This is a means of displaying the latest measurement results together with the results.

[2. Operation and Effect] The operation procedure of the present embodiment as described above is shown in the flowchart of FIG.

[2-1. Selection of display mode]
The user selects the dual spectrum mode by depressing a predetermined key of the input device 1 (step 21). The double spectrum analyzer mode is a mode in which the latest measurement result of the frequency analysis and the previous measurement result are displayed in a double manner (double spectrum analyzer display) with their positions shifted.
If this mode is not selected, the process for displaying the dual spectrum is completed. As the display mode, in addition to the above-described dual spectrum mode, for example, a mode in which only the latest measurement result is displayed as in the related art may be selected. The processing required to select the display mode as described above is executed by the display mode selecting means 5.

[2-2. Initialization of Data and Setting of Sampling Time] When the dual spectrum mode is selected, the display mode selecting means 5 first initializes the latest data and the immediately preceding data (step 22). The data here is a measurement result of the frequency analysis, and the initialization is a process of clearing a storage area for storing the data.

Subsequently, the sampling time setting means 2 sets a time interval for performing frequency analysis, that is, a sampling time. The sampling time may be changed by the user from the input device 1.

And means 3 for measuring the sampling time.
However, while monitoring whether or not the set sampling time has elapsed (time-up), the sampling time is measured by waiting (waiting for execution) (step 24). When the sampling time elapses, the means 8 for saving the immediately preceding data saves the measurement result obtained by performing the frequency analysis immediately before to a predetermined storage area, for example, a buffer (step 25).

[2-3. Frequency analysis and display of measurement results)
Then, the sampling means 4 measures which band is and how strong the signal level is for a plurality of frequency bands included in the sound source (spare spectrum sampling) (step 26), and the means 6 for displaying the latest data is displayed. Then, the data obtained by the latest measurement is displayed on the display device 7 (spreader display) (step 27). Also, at this point,
Since the previous data 9 is saved in the storage area, the means 10 for displaying the previous data displays the saved previous data 9 on the display device 7 (step 28). .

Then, means 6 and 1 for displaying the latest data
The display 10 of the previous data displays the latest data and the previous data in a double position with the positions shifted. As a result, the latest data and the first data are both displayed on the display device 7 simultaneously.

[2-4. Display Example] FIGS. 4 and 5 show display examples in which the latest data and the previous data are displayed twice. That is, the display content of FIG. 4 is updated with the result of the next frequency analysis, and the state after the transition is the display example of FIG. 5, and FIG. 4 is the previous display content as viewed from FIG. In FIGS. 4 and 5, the latest measurement results of the signal levels of the seven bands are shown by the height of a column (level bar) formed by a thick horizontal line.
The result of the previous measurement is indicated by the height of the column composed of thin horizontal lines. As shown in these figures, the data indicated by the thick horizontal line in FIG. 4 is indicated by the thin horizontal line in FIG. 5, which is the measurement result which was the latest data in FIG. However, this means that the data is displayed as “one time before” in FIG.

As described above, when the display based on the latest data and the previous data is completed (steps 27 and 28),
The means 5 for selecting the display mode monitors the release of the dual spectrum mode (step 29). When the display is released, the procedure ends, but if not, the procedure from step 23 is executed again.

[2-5. Effect] As described above, in the present embodiment, not only the latest measurement result but also the previous measurement result are displayed collectively, so that it is easy to see at a glance how the frequency characteristics of each band change with time. Can be grasped. In addition, by displaying not only the latest measurement result but also the previous measurement result at the same time, various complicated movements with ordered movement can be shown.
For this reason, the visual stimulus is more effectively added to the auditory stimulus caused by the music itself, thereby greatly satisfying the user's preference.

In the present embodiment, the conventional display for displaying only the latest measurement results and the display according to the present invention for simultaneously displaying both the latest and previous measurement results can be freely selected, so that the purpose and personal It is easy to display according to personal preference.

In particular, in the present embodiment, the previous measurement result and the new measurement result are displayed twice with their positions shifted, so that it is easy to compare the two and grasp the transition of the frequency characteristic. . In addition, the frequency characteristic of the same sound source is 2
By being superimposed, the entire display is emphasized and easy to see, and the recognizability is improved. Furthermore, by displaying the previous measurement result and the new measurement result not at completely different positions but superimposed at shifted positions, the area used for display can be reduced.

Further, in the present embodiment, the previous measurement result is displayed in a certain color, and the new measurement result is displayed in another color, so that the two can be easily identified at a glance. In addition, by displaying the frequency characteristics, a plurality of colors show complicated movements, thereby further satisfying the user's preference.

[3. Other Embodiments] The present invention is not limited to the above embodiments, but includes other embodiments as exemplified below. For example, instead of being built in the car audio unit as in the above embodiment, the spectrum analyzer for performing the frequency analysis may be prepared as a separate unit and connected to the car audio unit via a BUS or the like.

In the display examples (FIGS. 4 and 5) of the above embodiment, the latest data and the immediately preceding data are distinguished by changing the thickness of the horizontal line constituting the level bar. Data and previous data may be distinguished in other ways. For example, the latest data and the previous data can be distinguished by displaying them in different colors, such as pink for the latest data and red for the previous data. Also, for example, using a character such as a humanoid having a different posture according to the strength of the signal level, for example, by shifting the display position of the different character with respect to the latest data and the previous data, for example. It can also be distinguished by displaying.

[0035]

As described above, according to the present invention, not only the latest measurement result but also the previous measurement result are displayed at the same time, so that it is possible to see at a glance how the frequency characteristic of the sound changes with time. It can be easily grasped, and the user's preference is satisfied.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a hardware configuration according to an embodiment of the present invention.

FIG. 2 is a functional block diagram showing a configuration of the embodiment of the present invention as viewed from a function.

FIG. 3 is a flowchart showing an operation procedure of the embodiment of the present invention.

FIG. 4 is a view showing a display example of a measurement result in the embodiment of the present invention.

FIG. 5 is a view showing a display example of a measurement result in the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Input device 2 ... Means for setting sampling time 3 ... Means for measuring sampling time 4 ... Means for sampling 5 ... Means for selecting display mode 6 ... Means for displaying the latest data 7 ... Display device 8 ... Data before one time 9: Previous data 10: Display of previous data 11 ... Spreader 12: CD 13: Tuner 14: Display 15: CPU

Claims (7)

[Claims] 1. A means for measuring a signal level of each of a plurality of bands included in a given sound at predetermined time intervals, a means for storing a measurement result, and a method for storing a stored previous measurement result and a new one. A frequency analysis display device, comprising: means for simultaneously displaying measurement results. 2. The frequency analysis display device according to claim 1, further comprising means for selecting whether to display a previous measurement result. 3. The frequency analysis display according to claim 1, wherein said display means is configured to display a previous measurement result and a new measurement result in a superimposed position at a shifted position. apparatus. 4. The display device according to claim 1, wherein the display unit displays the previous measurement result and the new measurement result in different colors. Frequency analysis display device. 5. A step of measuring a signal level of each of a plurality of bands included in a given sound at regular intervals, a step of storing a measurement result, and a step of storing the stored previous measurement result and a new one. Displaying a measurement result at the same time. 6. The frequency analysis display method according to claim 5, wherein in said displaying step, a previous measurement result and a new measurement result are superimposed and displayed at shifted positions. 7. A recording medium storing a frequency analysis display program for analyzing and displaying a frequency characteristic of a sound using a computer, wherein the program is provided to the computer for each of a plurality of bands included in a given sound. A recording medium storing a frequency analysis display program characterized in that a signal level is measured at regular intervals, a measurement result is stored, and the stored previous measurement result and a new measurement result are simultaneously displayed.