JPH08271620A - Signal display apparatus - Google Patents

Abstract

PURPOSE: To provide a signal display device by which the operating load on an operator is reduced by a method wherein, in a signal detection operation used in signal analysis, a signal detection result is displayed as numerical-value information and image information. CONSTITUTION: An acoustic signal which has been input by a sensor 1 or an acoustic signal which has been stored in database 2 is converted into a sound spectrum graph by a signal processing part 3. Line information is detected by the sound sepctrum graph by a signal detection part 4, the line information is converted into a numerical value by a line-shape computation part, and they are displayed on a display part 6 together.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a signal processing device for analyzing signal information obtained by sonar or the like. In particular, the present invention relates to a signal display device for an operator to work when detecting a signal that seems to be effective from the result of signal processing by the signal processing device.

[0002]

2. Description of the Related Art When analyzing a signal obtained by sonar or the like, the waveform is sampled at regular intervals without directly treating the waveform and converted into a frequency spectrum, and the converted frequency spectrum is arranged as a sound spectrum graph per hour. Often handled. The signal radiated from an object appears on the graph as a relatively high level sequence (hereinafter referred to as a line) with the surroundings. The operator cuts out this line from the graph using an input device such as a mouse and analyzes it. Attempts have been made to automate the cutting work by a computer. However, full automation has not yet been realized, requiring operator intervention. Regarding signal detection in operator intervention,
R. J. The relationship between receivers, display devices, and observers (operators) is described in "Principles of Underwater Acoustics" by Yurick, Kyoritsu Shuppan (Showa 53), p365.

[0003]

SUMMARY OF THE INVENTION In the above prior art,
When an operator detects a line from an image, there is a problem that it is difficult to understand how it is processed in the computer. Therefore, an object of the present invention is to provide a display device for displaying the signal detection status so that the operator can easily grasp the signal detection status.

A more specific object is to present the operator with the line shape information calculated by the line numerical information and the line shape information detected by the signal detecting device.

Another object of the present invention is to present the operator with information about the line and the periphery of the line detected by the signal detecting device.

Still another object of the present invention is to provide a signal display device for displaying a line detected by a signal detection device on a sound spectrum graph generated by a signal processing device in a manner that is easy for an operator to understand. That is.

[0007]

In order to solve the above problems, an image processed by the signal processing device and line information detected by the signal detection process are simultaneously displayed.

[0008]

The acoustic signal is converted into a sound spectrum graph and displayed, and the detected line mark information, the line graph and the line shape information are displayed, so that the operator who analyzes the signal can easily see the information of the target signal. You can check it at.

[0009]

An embodiment of the present invention will be described in detail with reference to FIG. FIG. 1 is a functional block diagram showing an embodiment of the present invention. Largely, there are 4 of operation section, display section, input signal section and processing section.
Composed of two.

The operation unit includes an input unit 7 for receiving an input from an operator, and the display unit includes a display unit 6 for displaying processing results and the like.

The input signal section is composed of a sensor section 1 which directly picks up external sound and a database 2 which is a storage medium such as a magnetic tape or a hard disk.

The processing section includes a signal processing section 3, a signal detecting section 4,
It is composed of a screen control unit 5 and a line shape calculation unit 8. The signal processing unit 3 converts the signal data input from the sensor 1 and the database 2 into a sound spectrum graph. The sound spectrum graph is a graph in which an acoustic signal is Fourier-transformed at predetermined time intervals and distinguished (shaded) according to the level of spectrum power. The signal detector 4 detects a line from the information processed by the signal processor 3. The screen control unit 5 causes the display unit 6 to display the input data. The line shape calculation unit 8 calculates the shape of the line detected by the signal detection unit 4.

In such a configuration, when the acoustic signal data is input from the sensor 1 or the database 2 to the signal processing unit 3, the signal processing unit 3 samples the acoustic signal data at regular intervals and performs Fourier transform. To a frequency spectrum and generate a sound spectrum graph. Next, this sound spectrum graph is sent to the screen controller 5 and the signal detector 4. The sound spectrum graph sent to the screen control unit 5 is subjected to signal detection here, and the detection result of the signal is sent to the screen control unit 5 and the line shape calculation unit 8. Signal detection is to determine the presence / absence of a signal within a certain fixed time by a computer itself or artificially (manually).

FIG. 2 is a diagram showing a screen structure of the display unit 6. Of these, a sound spectrum graph is displayed on the signal processing result display screen 11. On the signal detection result display screen 12, numerical information such as the average frequency of the cut line is displayed. On the line shape calculation result display screen 13, numerical information such as the average level of the cut line and the fluctuation degree of the line is displayed.

FIG. 3 shows the signal processing result display screen 11 of FIG.
It is a figure which shows the display content of. When an acoustic signal having a certain frequency is displayed on the sound spectrum graph, it becomes as shown in 21. 23 are lines, respectively.

Reference numeral 22 in FIG. 3 indicates a signal processing result display screen 11
Is another display example of. Reference numeral 22 shows the signal detection result directly displayed on the sound spectrum graph. In this case, if the signal is detected correctly, the correct detection result 24 is displayed on the line 23. If noise or the like is erroneously detected, an erroneous detection result 25 is displayed at a position different from the line 23. The detection result (24, 25) is displayed separately from the original sound spectrum graph. Examples of the method of distinction include changing the display brightness, color, and line thickness. It is also possible to combine these. Further, if the operator displays (non-displays) the detection result (24, 25) using the input device, the detection result (24, 25) and the hidden portion can be associated with each other, and the operator can determine whether or not there is a signal. To help judge.

FIG. 4 shows the signal detection result display screen 12 of FIG.
It is a figure showing the display content of. Reference numeral 31 is an example of displaying the numerical information of the detected line. The average frequency 34 of the detected lines is displayed in the line number 33.
This display makes it easy to see where the detected line is on the sound spectrum graph.

32 is a signal detection result display screen 1 of FIG.
This is an example different from 31 indicating the display content of 2. 32 is an example in which a detected line and a graph around the line are displayed. Reference numeral 35 is a series of differences in the maximum values of the lines cut out from the sound spectrum graph. In this example, a square graph is cut out from the sound spectrum graph. Since the operator can easily grasp the detected line and the graph around the line, this display method is useful for determining whether the signal is the target of analysis (whether it is noise).

FIG. 5 is a diagram showing the display contents of the line shape calculation result display screen 13 of FIG. The shape information of the line detected in line number 41 is displayed in 42. This display allows the operator to easily know more detailed information of the detected line.

By displaying the above-mentioned signal detection results, the operator can grasp not only the sound spectrum graph but also the information of the detected signal as numerical values and image information when the target signal is detected, so that the operator can set the target. The material for determining whether or not it is a signal is increased, and the work efficiency of the operator is improved.

[0021]

According to the present invention, at the time of signal detection, the signal detection result is displayed on the sound spectrum graph and on the display screen for the signal detection result as line numerical information, image information around the line and the line, and line shape information. Therefore, the material for determining whether or not the signal is a target signal is increased, and the work efficiency of the operator is improved.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an embodiment of the present invention.

FIG. 2 is a diagram showing a screen configuration of a display unit 6 of FIG.

FIG. 3 is a diagram showing display contents of a signal processing result display screen 11 of FIG.

FIG. 4 is a diagram showing display contents of a signal detection result display screen 12 of FIG.

5 is a diagram showing display contents of a line shape calculation result display screen 13 of FIG.

[Explanation of symbols]

1 ... Sensor, 2 ... Database, 3 ... Signal processing unit, 4 ...
Signal detection unit, 5 ... Screen control unit, 6 ... Display unit, 7 ... Input unit, 8 ... Line shape calculation unit 11 ... Signal processing result display screen, 12 ... Signal detection result display screen, 13 ... Line shape calculation result display screen

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Koichi Honma 1099, Ozenji, Aso-ku, Kawasaki-shi, Kanagawa Ltd. System Development Laboratory, Hitachi, Ltd. (72) Kazuhiko Hino, 216, Totsuka-cho, Totsuka-ku, Yokohama, Kanagawa Incorporated company Hitachi, Ltd., Information & Communication Division (72) Inventor Hiro Takahashi, 216 Totsuka-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Incorporated, Hitachi, Ltd., Information & Communication Division (72) Inventor, Shoji Yoshida 216 Totsuka-cho, Totsuka-ku, Yokohama-shi, Kanagawa Bunka Co., Ltd.Hitachi, Ltd., Information & Communication Division

Claims (2)

[Claims] 1. A sensor for inputting an acoustic signal, a signal processing unit for generating a sound spectrum graph from the acoustic signal input by the sensor, and a line component extracted from the sound spectrum graph generated by the signal processing unit. A line detecting means for detecting line information indicating the same line, a line shape calculating means for calculating line shape information by digitizing the shape of the line detected by the line detecting means, the sound spectrum graph, the line A signal display device, comprising: screen control means for displaying information and the line shape information on the display means in association with each other. 2. The signal display device according to claim 1, wherein the screen control means displays the line information detected on the sound spectrum graph by overwriting it by changing at least one of luminance and color. Signal display device.