JP2002359836A - Remote monitoring system, monitoring camera device for the remote monitoring system and monitor for the remote monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a remote monitoring system capable of displaying any past images. SOLUTION: A monitoring camera device 1 divides an image signal imaged with a camera between first image component data and second image component data to perform compression and encoding with an image information compressing part 5, stores the compressed and encoded second image component data in a second image component data storing part 6 and also transmits the compressed and encoded first image component data to a monitor 2 through a communication line 3; and the monitor 2 stores the compressed and encoded first image component data that are transmitted in a first image data storing part 13, decompresses the first image component data, converts the first image component data into an image signal with an image information decompressing part 14, displays the image signal on a display means 15, reads the compressed and encoded first image component data stored in the first image data storing part, in response to an instruction input, decompresses the first image component data for converting the first image component data into an image signal with the image information decompressing part and displays the image signal on the displaying means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote monitoring system provided with a monitoring camera device, a communication line, and a monitoring device, a monitoring camera device for the remote monitoring system, and a camera device for the remote monitoring system.

[0002]

2. Description of the Related Art A conventional technique is disclosed in Japanese Patent Application Laid-Open No. 2000-5.
According to the technique disclosed in Japanese Patent No. 9758, an image information compression unit that compresses and codes two images, a high-compression rate image with low image quality and a low-compression rate image with high image quality, and stores compressed data in the surveillance camera device. A first storage unit for storing compressed data of a high-quality image with a low compression rate in the first storage unit, and compressing the compressed data of a high-quality image with a low quality with a communication line in real time. The transmitted compressed data of the high-compression-rate image of low image quality is displayed on the display unit and stored in the second storage unit. A necessary part is searched backward from the low-quality high-compression-ratio image stored in the second storage unit, and the compressed data of the high-quality high-compression-ratio image of the required part is read out from the first storage unit. Transmitted to the monitoring device and displayed with high image quality It has become possible way.

However, in this technique, the first and second storage units and the communication line require a large-capacity memory and a high-speed communication line to support high-quality, low-compression-rate image data. However, there is a problem that it becomes expensive.

As a technique for improving this, Japanese Patent Laid-Open No.
There is a technology disclosed in 294939. According to this technology, an image compression unit that divides an image captured by a camera into standard image component data and high image component data and performs compression encoding is provided, and the compression encoded high image component data is stored in a monitoring camera device. The monitoring unit transmits the compressed and coded standard image component data to the monitoring device, displays the image on the monitor with the monitoring device, monitors the standard image, and stores the data in the storage unit of the monitoring camera after the monitoring display on the monitor is completed. The compression-encoded high image component data is transmitted to the monitoring device in a lump, and the compression-encoded standard image component data accumulated in the monitoring device and the transmitted compression-encoded high image component data are combined to obtain a high Images can be displayed.

[0005] According to this technique, by having separate memories for storing data, the capacity of each memory can be reduced, and the speed of the communication line can be reduced.

[0006]

However, in this technique, since the compression-encoded high image component data of the end screen is transmitted at a time after the standard image is displayed on the monitor, an image at an arbitrary time in the past cannot be displayed. . Since the compression-encoded high image component data is transmitted collectively, the compression-encoded standard image component data is not transmitted during the transmission period.If an abnormality such as a thief enters during the transmission period, only the low image is transmitted. can not see. In addition, the image data during the transmission period is not accumulated, and the image cannot be confirmed later in real time.

An object of the present invention is to provide a remote monitoring system, a monitoring camera device for the remote monitoring system, and a monitoring device for the remote monitoring system capable of displaying an arbitrary past image.

Another object of the present invention is to provide a remote monitoring system, a monitoring camera device for a remote monitoring system, and a monitoring device for a remote monitoring system capable of displaying an arbitrary past image as a high image when an abnormality occurs. It is in.

Still another object of the present invention is to provide a remote monitoring system, a monitoring camera device for the remote monitoring system, and a monitoring for the remote monitoring system, which are capable of displaying an image signal picked up by a camera in real time when an abnormality occurs. It is to provide a device.

[0010]

According to the present invention, a surveillance camera device, a communication line, and a surveillance device are provided. In the surveillance camera device, an image signal picked up by a camera is first compressed by an image information compression unit.
The image data is divided into image component data and second image component data and compression-encoded, the compression-encoded second image component data is stored in the second image component data storage unit, and the compression-encoded first image component data is transmitted through the communication line. Transmitted to the monitoring device, and the monitoring device transmits the compressed and encoded first
The image component data is stored in the first image data storage unit, expanded by the image information expansion unit, converted into an image signal, displayed on the display unit, and stored in the first image data storage unit in response to an instruction input. A remote monitoring system characterized in that the compression-encoded first image component data is read out, decompressed by the image information decompression unit, converted into an image signal, and displayed by the display means.

The present invention comprises a monitoring camera device, a communication line, and a monitoring device. In the monitoring camera device, an image signal captured by a camera is converted into first standard image component data and second image component data by an image information compression unit. Dividing and compressing and encoding, compressing and encoding the second image component data in the second image component data storage unit, and transmitting the compressed and encoded first image component data to the monitoring device through the communication line; Then, the transmitted compressed and encoded first image component data is stored in the first image data storage unit, decompressed by the image information decompression unit, converted into an image signal, displayed on the display unit, and responded to the instruction input. The compression-encoded first image component data stored in the first image data storage unit is read out, decompressed by the image information decompression unit, converted into an image signal, displayed by the display unit, and then displayed by a finger. In response to the input, the compression-encoded second image component data stored in the second image component data storage unit is transmitted to the monitoring device through the communication line, and the monitoring device transmits the compression-encoded second image component data. The two-image component data is input to the image information decompression unit, and the compressed and encoded first image component data having the same time as the transmitted and encoded second image component data transmitted from the first image data storage unit is read out. A remote monitoring system characterized in that a second image is obtained by inputting the information to an information decompression unit.

The present invention includes a monitoring camera device, a communication line, and a monitoring device. In the monitoring camera device, an image signal captured by a camera is converted into first standard image component data and second image component data by an image information compression unit. The divided and compression-encoded, the compressed and encoded second image component data is stored in the high image component data storage unit, and the compressed and encoded first image component data is transmitted to the monitoring device through the communication line. The transmitted and coded first image component data is stored in a first image data storage unit, is expanded by an image information expansion unit, is converted into an image signal, is displayed on a display unit, and is transmitted in response to an instruction input. The compression-encoded first image component data stored in the first image data storage unit is read out, decompressed by the image information decompression unit, converted into an image signal, displayed on the display unit, and subsequently displayed with an instruction. Transmitting the compressed and encoded second image component data stored in the high image component data storage unit to the monitoring device through the communication line in response to the force; The image component data is input to the image information decompression unit, and the compressed and encoded first image component data having the same time as the transmitted and encoded second image component data transmitted from the first image data storage unit is read out. The second image component data is input to the image information decompression unit to obtain a second image. When the second image is obtained, the surveillance camera device compresses an image signal captured by the camera in real time into the image information. Part 2
The image data is divided into image component data and second image component data and compression-encoded, the compression-encoded second image component data is stored in the second image component data storage unit, and the compression-encoded first image component data is stored in the communication line. And transmitting the compressed and coded first image component data to the first image data storage unit in the remote monitoring system.

According to the present invention, the surveillance camera has a function of detecting occurrence of an abnormal situation, calling an alarm signal and transmitting the alarm signal to the monitor, and the monitor has a function of notifying the transmitted alarm signal. It is a remote monitoring system characterized by having.

According to the present invention, a plurality of the surveillance camera devices are provided, camera recognition ID data is assigned to each camera, and images taken by each camera are monitored by the display means. A remote monitor system having a function of selecting some of the cameras according to the camera recognition ID data in accordance with a command from the monitoring device and displaying an image from the selected camera on the display means. It is.

According to the present invention, an image signal picked up by a camera is divided into a first image component data and a second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to a second image component. A surveillance camera device for a remote monitoring system, wherein the surveillance camera device accumulates in a component data accumulation unit and outputs compression-coded first image component data.

According to the present invention, the input compression-encoded first image component data is stored in a first image data storage unit, decompressed by an image information decompression unit, converted into an image signal, displayed on a display unit, and input with an instruction. Read out the compressed and coded first image component data stored in the first image data storage unit, decompress it in the image information decompression unit, convert it into an image signal, and display it on the display means. It is a monitoring device for a remote monitoring system.

According to the present invention, an image signal captured by a camera is divided into a first image component data and a second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to a second image component. The compression-encoded first image component data is stored in the component data storage unit, and the compressed and encoded second image component data stored in the second image component data storage unit is output in response to a subsequent instruction input. A surveillance camera device for a remote monitoring system.

According to the ear invention, the input compression-encoded first image component data is stored in the first image data storage unit, decompressed by the image information decompression unit, converted into an image signal, displayed on the display means, and input by instruction. Read out the compression-encoded first image component data stored in the first image data storage unit in response to the image data, expand the image data in the image information expansion unit, convert the image signal into an image signal, display the image signal on the display unit, and input a subsequent instruction. The compressed and coded second image component data input in response to the above is input to the image decompression unit, and the compressed and coded first image component data having the same time as the transmitted and coded second high image component data is transmitted to the image decompression unit. A monitoring device for a remote monitoring system, wherein a second image is obtained by reading out from a first image data storage unit and inputting the image information to the image information decompression unit.

According to the present invention, an image signal picked up by a camera is divided into first image component data and second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to a second image component. The compression-encoded first image component data is stored in the component data storage unit, and the compressed and encoded second image component data stored in the second image component data storage unit is output in response to a subsequent instruction input. The image information compression unit divides the image signal captured by the camera in real time into first image component data and second image component data and encodes them in a compressed manner. A surveillance camera device for a remote surveillance system, wherein the surveillance camera device stores compressed and encoded first image component data in an image component data storage unit.

According to the present invention, the inputted compression-encoded first image component data is stored in the first image data storage section, decompressed by the image information decompression section, converted into an image signal, displayed on the display means, and inputted with an instruction. Read out the compression-encoded first image component data stored in the first image data storage unit in response to the image data, expand the image data in the image information expansion unit, convert the image signal into an image signal, display the image signal on the display unit, and input a subsequent instruction. The compressed and coded second image component data input in response to the input is input to the image decompression unit, and the compressed and coded first image component data having the same time as the transmitted and coded second image component data is transmitted to the image decompression unit. A second image which is read out from one image data storage unit and input to the image information decompression unit to obtain a second image, and the input compression-coded first image component data is stored in the first image data storage unit. Rukoto is for remote monitoring system monitoring device according to claim.

In the above, the first image component data is, for example, standard image component data, and the second image component data is, for example, high image component data having higher image quality than the standard image component data.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, hierarchical coding performed in image information compression and image information expansion will be described.
Hierarchical coding here refers to SNR (Signal to Noise Ra) using, for example, the scalability function of MPEG-2.
tio), spatial resolution and temporal resolution are encoded stepwise, and DCT (Discrete Cosin
e Transform, Discrete Cosine Transform) There are data partitioning that divides and encodes into low frequency components and high frequency components using coefficients.

In coding using scalability, compression is performed on a standard image component of a base image quality (high compression), and at the same time, high image quality component compression is performed by calculating a difference from the standard image component. In order to view a high-quality image, a high-definition image having higher image quality (lower compression) than the standard image is created by adding a high-image component to the base standard image component.

For example, in SNR scalability, D
The coefficient obtained by the CT is coarsely quantized by a quantizer to generate a base standard image component (stream). The coarsely quantized low SNR signal is inversely quantized to obtain a reproduction value, and the quantization is performed. This is realized by creating a high image component by quantizing the difference from the previous DCT coefficient using a fine quantization step. Also, in data partitioning,
This is realized by setting a low frequency component as a standard image component (stream) and a high frequency component as a high image component.

FIG. 1 is a block diagram of a first embodiment of a remote monitoring system according to the present invention. The remote monitoring system includes a monitoring camera device 1, a monitoring device 2, and a communication line 3. The surveillance camera device 1 includes a camera 4, an image information compression unit 5, a high image component data storage unit 6, a data multiplexing unit 7, a communication control unit 8, a sensor 9, and a control unit 10. Monitoring device 2
Includes a communication control unit 11, a data extraction unit 12, a standard image data storage unit 13, an image information decompression unit 14, a monitor unit 15, a control unit 16, and an instruction input unit 17.

First, the normal operation will be described. Image data of an image input from the camera 4 that captures an image in a predetermined area is divided into standard image component data and high image component data in the image information compression unit 5 and hierarchically compressed. The compression-encoded standard image component data that has been compression-encoded by the image information compression unit 5 is transmitted to the communication control unit 8 via the data multiplexing unit 7.
Is transmitted to the communication line 3 in real time. At the same time, the compression-encoded high image component data is stored in the high image component compressed data storage unit 6.

The compression-encoded standard image data transmitted from the surveillance camera device 1 in real time is received by the communication control unit 11 of the surveillance device 2, extracted by the data extraction unit 12,
It is output to the standard image data storage unit 13 and the standard information decompression unit 14. The image information decompression unit 14 decompresses the compression-encoded standard image data, converts it into standard image data, displays it on the monitor unit 15, and monitors it in real time. At the same time, the compression-encoded standard image data is stored in the standard image data storage unit 13.

Next, an operation for confirming an image when an abnormal situation occurs will be described. When the necessity of the confirmation operation occurs during the monitoring due to an abnormal situation, a control signal is sent from the instruction input unit 17 to the control unit 16. In accordance with the control signal, the control unit 16 reads out the past compression-encoded standard image component data from the standard image data storage unit 13 of the monitoring device 2 and outputs it to the image information decompression unit 14 to convert it into a standard image. To display the required video.

Thereafter, in order to view a high image, a control signal is sent from the monitoring device 2 to the control unit 10 of the monitoring camera device 1 by a predetermined operation, and the high image component data storage unit 6
And reads out the compressed and coded high image component data stored in the
The data multiplexing unit 7 multiplexes the image captured in real time by the image information compression unit 5 with the standard image data, and transmits the multiplexed image from the communication control unit 8 to the monitoring device 2. At the same time, the high-image-component-compressed data stored in the high-image-component-compressed data storage unit 6 is compressed and encoded by the image information compression unit 5 of the image captured by the camera 4 in real time.

When the multiplexed compressed data is transmitted, the data extraction unit 12 extracts the compression-encoded standard image data, and stores the real-time compression-encoded standard image data in the standard image data storage unit 13. At the same time, the compression-encoded high image component data extracted by the data extraction unit 12 is input to the image information decompression unit 14 and the compressed and encoded standard image data of the same time as the transmitted compression-encoded high image component data is standardized. Read from the image data storage unit 13. Here, since time data is usually added to the compression-encoded data, the time data is read, so that the compression-encoded standard image data having the same time as the compression-encoded high image component data is read from the standard image data storage unit 13. Can be.
By inputting the read compression-encoded standard image data to the image information decompression unit 14 and converting it, a high image can be obtained.

Since the confirmation at the time of occurrence of the abnormal situation is not performed retroactively for a long time, the amount of data stored in each of the image compression data storage units 6 and 13 is not large.

Here, in the data multiplexing section 7, compression-encoded standard image data of a real-time image from the camera 4
Regarding the multiplexing with the compression-encoded high image component data read from the high image component storage unit 6, if there is no free space in the communication line 3, the image quality of the standard image is reduced to reduce the amount of information. A space may be made in the space.

Further, the transmitted compression-encoded high image component data is temporarily stored in the standard image data storage unit 13 by the monitoring device 2, and the stored compressed and encoded high image component data and the compression-encoded standard image are stored. By simultaneously reading data, the communication from the monitoring camera device 1 may be intermittently transmitted asynchronously.

After the confirmation of the abnormal image is completed, the image being confirmed is stored in the standard image data storage unit 1.
It is also possible to be able to read from 3 in fast forward. This makes it possible to perform real-time monitoring with almost no idle period.

Next, notification when an abnormal situation occurs will be described. In the monitoring camera device 1, the occurrence of an abnormal situation in the monitored area is detected by the sensor 9, and the control unit 1
Notify 0. The control unit 10 has a calling function. Upon detection of occurrence of an abnormal situation, the control unit 10 issues an alarm signal and transmits the alarm signal from the communication control unit 8 to the monitoring device 2 via the communication line 3. Thus, the monitoring apparatus 2 can confirm the occurrence of an abnormal situation from the monitor unit 15 or a loudspeaker (not shown), and the monitor unit 15 can also monitor the image information transmitted at the same time.

FIG. 2 is a block diagram of a second embodiment of the remote monitoring system according to the present invention. FIG. 2 is different from FIG. 1 in that a plurality of cameras 4, 24, 34 are prepared in the monitoring camera device 1, and an ID adding unit 22 is added. Others are the same as FIG.

Camera recognition ID data is assigned to each of the cameras 4, 24, and 34, and the ID addition unit 22 adds camera recognition ID data indicating that the image was captured by the camera to the image data of the image captured by each camera. ID data is incorporated.

In the monitoring device 2, each of the cameras 4, 24, 34
The image taken from is monitored by the monitor unit 15,
When the occurrence of an abnormal situation is detected by the sensor 9, one or a plurality of necessary cameras can be designated by ID data by a predetermined operation, and an image of the necessary camera can be monitored by the monitor unit 15. Here, the communication line 3 may be either wired or wireless.

[0039]

According to the present invention, it is possible to obtain a remote monitoring system, a monitoring camera device for a remote monitoring system, and a monitoring device for a remote monitoring system capable of displaying an arbitrary past image. Further, according to the present invention, it is possible to obtain a remote monitoring system, a monitoring camera device for a remote monitoring system, and a monitoring device for a remote monitoring system capable of displaying an arbitrary past image in a high image when an abnormality occurs. Further, according to the present invention, it is possible to obtain a remote monitoring system, a monitoring camera device for a remote monitoring system, and a monitoring device for a remote monitoring system capable of displaying an image signal captured by a camera in real time when an abnormality occurs. Can be.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of a remote monitoring system according to the present invention.

FIG. 2 is a configuration diagram of a second embodiment of the remote monitoring system of the present invention.

[Explanation of symbols]

1: surveillance camera device, 2: surveillance device, 3: communication line,
4: camera, 5: image information compression section, 6: high image component data storage section, 7: data multiplexing section, 8: communication control section, 9: sensor, 10: control section, 11: communication control section, 1
2: data extraction unit, 13: standard image data storage unit, 1
4: image information decompression unit, 15: monitor unit, 16: control unit, 17: instruction input unit, 22: ID addition unit, 2
4: camera, 34: camera.

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/24 H04Q 9/00 311J H04Q 9/00 311 H04N 7/13 Z (72) Inventor Norihisa Kuriyama 1410 Inada, Hitachinaka-shi, Ibaraki Pref. Digital Media Product Division, Hitachi, Ltd. (72) Inventor Ichiro Hamana 1410 Inada, Hitachinaka-shi, Ibaraki Pref. 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term in Hitachi Image Information System Co., Ltd. (reference) DD03 EE15 EE20 FF01 FF04 FF19 FF20 GG02 GG23 GG66 5K048 BA10 BA21 FB04 F B05 GB08 HA01 HA02

Claims (11)

[Claims] 1. A surveillance camera device, a communication line, and a surveillance device. In the surveillance camera device, an image signal captured by a camera is divided into first image component data and second image component data by an image information compression unit. Compression-encoding, accumulating the compression-encoded second image component data in the second image component data storage unit, and transmitting the compression-encoded first image component data to the monitoring device through the communication line; The compressed and encoded first image component data is stored in a first image data storage unit, expanded by an image information expansion unit, converted into an image signal, displayed on a display unit, and responded to an instruction input. A remote monitoring unit that reads out the compressed and encoded first image component data stored in the image data storage unit, decompresses the image data by the image information decompression unit, converts the decompressed first image component data into an image signal, and displays the image signal on the display unit Stem. 2. A surveillance camera device, a communication line, and a surveillance device. In the surveillance camera device, an image signal captured by a camera is divided into first standard image component data and second image component data by an image information compression unit. Compression encoding, the compression encoding second
The image component data is stored in a second image component data storage unit, and the compression-encoded first image component data is transmitted to the monitoring device via the communication line. The monitoring device transmits the compressed and encoded first image. The component data is stored in the first image data storage unit, is expanded by the image information expansion unit, is converted into an image signal, is displayed by the display unit, and is compressed in the first image data storage unit in response to an instruction input. The encoded first image component data is read out, decompressed by the image information decompression unit, converted into an image signal, displayed on the display means, and stored in the second image component data storage unit in response to a subsequent instruction input. The compression-encoded second image component data is transmitted to the monitoring device through the communication line, and the monitoring device transmits the transmitted compression-encoded second image component data to the image information decompression unit. And reads out the compressed and coded first image component data of the same time as the transmitted and coded second image component data from the first image data storage unit, inputs the read data to the image information decompression unit, and A remote monitoring system characterized in that it is obtained. 3. A surveillance camera device, a communication line, and a surveillance device. In the surveillance camera device, an image signal captured by a camera is divided into first standard image component data and second image component data by an image information compression unit. Compression encoding, the compression encoding second
The image component data is stored in the high image component data storage unit, and the compression-encoded first image component data is transmitted to the monitoring device through the communication line. The monitoring device transmits the compressed and encoded first image component. The data is stored in a first image data storage unit, expanded by an image information expansion unit, converted into an image signal, displayed on display means, and the compression code stored in the first image data storage unit in response to an instruction input. The compressed first image component data is read out, decompressed by the image information decompression unit, converted into an image signal, displayed on the display means, and the compression code stored in the high image component data storage unit in response to a subsequent instruction input Transmitting the encoded second image component data to the monitoring device via the communication line, and inputting the transmitted encoded second image component data to the image information decompression unit. And reads out the compressed and encoded first image component data at the same time as the transmitted and encoded second image component data from the first image data storage unit and decompresses the compressed and encoded second image component data into the image information. The second camera obtains a second image by inputting the second image component data and the second image by the image information compressing unit in the surveillance camera device while the second image is being obtained. The data is divided into component data and compression-encoded, and the compression-encoded second image component data is stored in the second image component data storage unit, and the compression-coded first image component data is transmitted to the monitoring device through the communication line. Wherein the monitoring apparatus stores the transmitted compressed and coded first image component data in the first image data storage unit. 4. The remote monitoring system according to claim 1, wherein said monitoring camera device has a function of detecting occurrence of an abnormal situation, calling out an alarm signal and transmitting the alarm signal to said monitoring device. The remote monitoring system has a function of notifying the transmitted alarm signal. 5. The remote monitoring system according to claim 4, wherein a plurality of said monitoring camera devices are provided, each camera is assigned camera recognition ID data, and an image taken by each camera is monitored by said display means. A function of displaying an image from a camera selected and selected by a command from the monitoring device based on the camera recognition ID data based on the camera recognition ID data on the display unit when an abnormal situation occurs. A remote monitoring system, characterized in that: 6. An image signal captured by a camera is divided into a first image component data and a second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to a second image component data.
A surveillance camera device for a remote monitoring system, wherein the surveillance camera device stores the compressed and encoded first image component data in an image component data storage unit. 7. An input compression-encoded first image component data is stored in a first image data storage unit, decompressed by an image information decompression unit, converted into an image signal, displayed on display means, and responded to an instruction input. Remote-monitoring means for reading out the compression-encoded first image component data stored in the first image data storage section, decompressing the image data by the image information decompression section, converting the image signal into an image signal, and displaying the image signal on the display means. System monitoring device. 8. An image signal captured by a camera is divided into a first image component data and a second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to a second image component data.
The compressed and encoded second image component data stored in the second image component data storage unit is stored in the image component data storage unit and the compressed and encoded first image component data is output. A monitoring camera device for a remote monitoring system characterized by outputting. 9. An input compression-encoded first image component data is stored in a first image data storage unit, decompressed by an image information decompression unit, converted into an image signal, displayed on a display means, and responded to an instruction input. And reads out the compressed and encoded first image component data stored in the first image data storage unit, decompresses the image data by the image information decompression unit, converts the decompressed first image component data into an image signal, displays the image signal on the display unit, and responds to a subsequent instruction input. The compressed and encoded second image component data input to the image decompression unit is input to the image decompression unit, and the compressed and encoded first image component data having the same time as the transmitted and encoded second high image component data is transmitted to the first A monitoring device for a remote monitoring system, wherein the monitoring device is read from an image data storage unit and input to the image information decompression unit to obtain a second image. 10. An image signal captured by a camera is divided into first image component data and second image component data by an image information compression section and compression-encoded, and the compression-encoded second image component data is converted to second image component data. Storing the compressed and encoded first image component data in the storage unit and outputting the compressed and encoded second image component data to the second image component data storage unit in response to a subsequent instruction input; And an image signal captured in real time by the camera is divided into first image component data and second image component data by the image information compressing section and compression-encoded, and the compression-encoded second image component data is converted to the second image component. A surveillance camera device for a remote surveillance system, wherein the surveillance camera device stores the data in a data storage unit and outputs the compression-coded first image component data. 11. An input compression-encoded first image component data is stored in a first image data storage unit, decompressed by an image information decompression unit, converted into an image signal, and displayed by display means.
In response to the instruction input, the compression-encoded first image component data stored in the first image data storage unit is read out, decompressed by the image information decompression unit, converted into an image signal, and displayed on the display unit. The compression-encoded second image component data input in response to the instruction input is input to the image decompression unit, and the compression-encoded first image component data having the same time as the transmitted compression-encoded second image component data is transmitted to the image decompression unit. Reading from the first image data storage unit and inputting the image information to the image information decompression unit to obtain a second image; and storing the input compression-coded first image component data in the first image data storage unit. A monitoring device for a remote monitoring system, characterized in that: