JPH066832A - Picture processing unit with real time fault diagnostic function - Google Patents

Abstract

PURPOSE:To attain various kinds of fault diagnosis for a picture processing unit in real time even with a microcomputer whose processing speed is slow. CONSTITUTION:A picture processing unit 1 processing a video signal is provided with a means 3 generating a prescribed test signal changing at a high speed corresponding to a picture element (several tens ns period) in place of a video signal for a blanking period, a signal fetch means 5 collecting a test signal processing output as the result of processing the test signal at the picture processing unit 1 at a high speed corresponding to the picture element (several tens ns period) and storing the signal to a storage means 6, the storage means 6 accessible independently of both the signal fetch means 5 and a microcomputer 7 and the microcomputer 7 fetching properly the content of the stored test signal processing output, analyzing it and implementing fault diagnosis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure diagnosis of an image processing device such as a television camera device.

[0002]

2. Description of the Related Art FIG. 2 shows a schematic configuration diagram of an image processing apparatus having a conventional failure diagnosis function using a microcomputer, and a conventional failure diagnosis method will be described. A video signal of a television camera device or the like is subjected to various kinds of signal processing by the built-in image processing device 1. However, when a failure diagnosis of the image processing device such as the television camera device is performed, a blanking period of the video signal ( Usually in the vertical blanking period),
A pulse-shaped test signal 2 ′ that does not change with time is input to the image processing apparatus 1 from the test signal generation circuit 3 ′. Then, with respect to the test signal 2'inserted in the blanking period, the test signal processing output 4'resulted from the image processing device 1 is fetched into the microcomputer 7 and the content thereof is analyzed to realize in real time. The failure diagnosis of the image processing apparatus 1 is performed.

[0003]

In the above-mentioned prior art,
Test signal processing output 4'generated every blanking period
Is taken into the microcomputer 7 as it is,
Since the data collection of the test signal processing output 4'in the microcomputer 7 depends on the machine cycle of the microcomputer 7, the data collection is actually possible only in the period of several μs. On the other hand, the horizontal scanning period of the video signal is about 64 μs in the case of the NTSC system, and the video signal during this period changes at a high speed of about 70 ns for each pixel, and thus the microcomputer 7 having a slow processing speed directly In the conventional method of collecting data, only a part of the level system's failure diagnosis, such as white balance adjustment that allows failure diagnosis with a pulse-shaped test signal that does not change over time, is the limit, and it changes at high speed with pixel correspondence. The failure signal of the image processing apparatus 1 cannot be accurately diagnosed in real time by the signal. SUMMARY OF THE INVENTION It is an object of the present invention to eliminate these drawbacks and enable various failure diagnosis of an image processing apparatus in real time even with a microcomputer having a slow processing speed.

[0004]

In order to achieve the above object, the present invention provides an image processing apparatus for processing a video signal, wherein a predetermined change is made at high speed in correspondence with pixels (several tens of ns cycle) during a blanking period. A means for generating a test signal, and a signal fetching means for fastly collecting the test signal processing output of the result obtained by processing the test signal by the image processing device for each pixel (several tens ns cycle) and storing it in the fetching storage means. And a storage means that can be independently accessed from both the signal capturing means and the microcomputer, and the microcomputer that appropriately captures and analyzes the stored test signal processing output content to perform failure diagnosis. Is.

[0005]

As a result, the test signal processing output that changes at high speed in correspondence with pixels (several tens of ns cycle) can be collected and stored in the storage means at high speed in correspondence with pixels (several tens ns cycle). This data can be taken in the machine cycle of the microcomputer when desired, and failure diagnosis can be analyzed appropriately according to the processing speed of the microcomputer. Even a microcomputer with a slow processing speed can perform failure diagnosis of the image processing device in real time. Becomes

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention is shown in FIG. 1 and its contents will be described in detail below. An image processing apparatus 1 is an apparatus for performing various arithmetic processing of image data. A test signal generation circuit 3 is a test signal 2 which changes at high speed in the blanking period of the video signal (vertical blanking period in this case) corresponding to the pixel for failure diagnosis (several tens of ns cycle) in the image processing apparatus 1. Is a circuit that generates and inputs. Reference numeral 4 denotes a test signal processing output, which is an output signal obtained by processing the test signal 2 by the image processing apparatus 1. Reference numeral 5 denotes a signal reading circuit, which is a circuit for collecting the test signal processing output 4 at a high speed for each pixel (several tens of ns) and storing it in the shared memory 6. Reference numeral 6 denotes a shared memory, and as shown in FIG. 3, two ports 8 capable of writing and reading data to and from the memory cell 9 independently from both the signal reading circuit 5 and the microcomputer 7.
A memory having 10. A microcomputer 7 analyzes the failure diagnosis from the contents of the data stored in the shared memory 6.

This operation will be described below. The image processing apparatus 1 is connected to the test signal generating circuit 3 and a predetermined test signal that changes at high speed corresponding to pixels (several tens of ns cycle) instead of the video signal during the blanking period. 2 is generated and input to the image processing apparatus 1. The image processing apparatus 1 for the test signal 2
The signal processing circuit 5 collects the test signal processing output 4 obtained as a result of (1) at high speed for each pixel (several tens ns cycle) and stores it in the shared memory 6. Then, the microcomputer 7 takes in the data stored in the shared memory 6 in the machine cycle, analyzes the data, and makes various failure diagnoses.

As described above, pixel correspondence (several tens of ns cycle)
The test signal processing output 4 that changes at high speed with a signal, the signal acquisition circuit 5 that can collect and store the data at high speed in correspondence with the pixel (several tens of ns cycle), and the two ports that can write and read data independently from both By using the shared memory 6 having 8 and 10, data can be collected and stored in the shared memory 6 at a high speed with a pixel correspondence (several tens of ns cycle). Captured in cycles, depending on the processing speed of the microcomputer 7,
A failure diagnosis analysis can be performed, and even the microcomputer 7 having a slow processing speed can perform image processing in real time.
It is possible to diagnose the failure.

[0009]

According to the present invention, it is possible to collect and store a test signal processing output which changes at high speed in correspondence with pixels (several tens of ns) in a shared memory at high speed in correspondence with pixels (several tens of ns). In a microcomputer, this data can be taken in this machine cycle at a desired time, and a failure diagnosis can be analyzed according to this processing speed, and even a microcomputer with a slow processing speed can perform failure diagnosis of an image processing device in real time. It is very effective in predicting a major accident and in swift and appropriate processing when an accident occurs.

[Brief description of drawings]

FIG. 1 is a block diagram showing the overall configuration of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional example.

FIG. 3 is a block diagram showing the configuration of a shared memory.

[Explanation of symbols]

1 image processing device, 2 test signal input, 3 test signal generation circuit, 4 test signal processing output, 5 signal acquisition circuit, 6 shared memory, 7 microcomputer.

Claims (1)

[Claims] 1. In an image processing device for processing a video signal, a means for generating a predetermined test signal that changes at high speed corresponding to a pixel (several tens of ns period) during a blanking period, and the test signal is used for the image processing. A signal fetching unit that collects a test signal processing output as a result of processing by the device at a high speed for each pixel (several tens of ns cycle) and stores it in a storing unit, and an independent access from both the signal fetching unit and the microcomputer. An image processing apparatus with a real-time fault diagnosis function, comprising: the above-mentioned possible storage means and the above-mentioned microcomputer which appropriately fetches and analyzes the stored test signal processing output content to perform a fault diagnosis.