JP2003018559A - Data multiplexed radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a radio communication system capable of reproduce a screen at a receiver side in real time with the least deterioration in quality corresponding to the an ever-changing connection state of communication lines of a PHS(Personal Handyphone System) system or a cellular phone system, by utilizing the general-purpose PHS system or the cellular phone system which performs an alternate function by switching when a satellite communication function does not work well. SOLUTION: This data multiplex radio communication system is a system where a moving image is transmitted via a plurality of radio telephone sets which can be used as an alternate communication means when the satellite communication is in a bad condition. The system is provided with a means for detecting the upper limit of data transmission rate on the basis of the number of telephone lines secured for transmission, a means for separating image information for a plurality of regions of the image, and an image information processing means for intermittently cutting the image data in a region with a low priority out of the separated image information from the information to be transmitted when the secured upper limit of the data transmission speed does not meet with a transmission rate enough to transmit an original image in real time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data multiplexing wireless communication system for transmitting moving images in real time through a PHS simple mobile phone network or a mobile phone network.

[0002]

2. Description of the Related Art Currently, a medical support system for connecting a patient in a remote place or an emergency case in a moving ambulance to a doctor in a medical facility by using satellite communication is being constructed. Regardless of the type of communication network to which the home patient's home or medical facility belongs, multiple doctors obtain medical data of home patients in remote areas in real time, and have a two-way communication using images and voice for consultation while talking. An example of a home medical support system is that disclosed in Japanese Patent Laid-Open No. 8-215158. In this system example, a nurse with a portable video conferencing unit and a portable medical device unit capable of loop-type multipoint conference visits a home patient and uses satellite communication network or satellite via a patrol medical support vehicle capable of satellite communication. A combination of communication network and ground communication network connects multiple doctors in remote areas to transmit the medical data of patients in real time, and while the doctor analyzes the received data, multipoint set by the nurse. It is a system that uses a conferencing system to have an examination while talking with doctors and a patient by interactive communication using images and voice. However, in image transmission systems that use satellites, communication functions are provided when it becomes difficult to secure a circuit due to heavy rainfall or snowfall, when satellites cannot be seen under the overpass or in the shadows of buildings, or when satellite communication equipment fails. May be lost. However, in order for this type of medical support system, which can be fatal in some cases, to be recognized by society, it is necessary to ensure the stability that a predetermined function is maintained at all times.

A form in which PHS or a mobile phone network is used as a communication means for image / sound from a mobile body which does not use satellite communication is rapidly prevailing. When transmitting moving image information through this PHS or mobile phone network, one line cannot catch up with the transmission speed for real-time transmission, so if the information is distributed to multiple lines and multiplex transmission is performed, the connection status of the communication line Changes from moment to moment,
We run into the problem that the effective data transmission rate is not constant. Further, when transmitting an image in which the screen density and the update frequency are fixed, there is an upper limit to the transmission speed of necessary data. In such a situation, if the effective data transmission rate is less than the required data transmission rate, the transmitting side retains data to be transmitted, and the receiving side cannot reproduce the screen in real time. In order to avoid such a situation, it is necessary to set the screen density to a low level and set the update frequency to a low level in advance, or to secure a large number of communication lines to enhance redundancy. However, the former method causes a deterioration in screen quality, and the latter method causes a problem of increased communication cost.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to utilize a general-purpose PHS or a mobile phone network as a means for switching and performing an alternative function when the satellite communication function is inadequate. It is an object of the present invention to provide a wireless communication system that allows a receiving side to reproduce a screen in real time with a minimum deterioration in quality according to the connection status of a communication line that the telephone network changes from time to time.

[0005]

In the data multiplex wireless communication system of the present invention, moving image information is transmitted via a plurality of wireless telephones or data communication terminals which can be used as alternative communication means when satellite communication is in poor condition. System for detecting the upper limit of the data transmission rate based on the number of communication lines secured at the time of transmission, a means for dividing image information into a plurality of areas of an image, and a means for dividing the secured data transmission rate. When the upper limit does not satisfy the transmission rate at which the original image data can be transmitted in real time, an image information processing unit that intermittently cuts the image data in the low priority area of the divided image information from the transmission information is provided. did.
The means for dividing the image information into a plurality of areas divides the image information into a plurality of areas from the central area to the peripheral area, and the priority for determining the image area to be cut is determined based on the distance from the image center or the image information and A means for detecting the degree of correlation by comparing the image information of the previous frame for each divided area is provided, and the low priority for determining the image area to be cut is determined based on the data of the area having a high degree of correlation. The image data of the low priority area in the divided image information is intermittently rejected from the transmission information.The image information processing is divided into the intermittently adopted method of intermittently transmitting the image data of the area. The transmission method is prepared, and both methods are appropriately combined so that the image information can be transmitted most effectively according to the upper limit of the data transmission rate secured at that time.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a system for transmitting medical data of a patient from an ambulance or a patrol medical support vehicle capable of satellite communication in real time to a medical facility with a doctor at a remote place via a satellite communication network. When the condition of the communication network is bad, it starts to meet the request to switch to another communication means and to secure the function of transmitting in real time.
Given that ambulances and patrol medical support vehicles are mobile and cannot be wired to a telephone line, it may be recalled that a general-purpose tool for wireless communication, a mobile phone or a PHS network can be used. .
However, the amount of data per hour that can be transmitted by these communication tools is limited, and it is too late to transmit the moving image in real time. Therefore, an ambulance or patrol medical support vehicle and medical facilities are connected in parallel with multiple lines, image information is distributed and transmitted at the transmission side, and the information signals that have been distributed and transmitted are combined at the reception side to reproduce the image. I thought about doing it. However, as described above, the connection status of the mobile phone or PH communication line changes from moment to moment, so the effective data transmission rate is not constant. In order to transmit moving images in real time, if the density of the screen is set to a low value or the update frequency is set in advance in order to simply reduce the transmission information, the quality of the screen will be deteriorated and communication The method of securing a large number of lines to enhance redundancy causes a problem that communication costs increase. Therefore, the inventor decided to keep the redundancy of the line used low, and to change the amount of image information to be transmitted according to the maximum communication speed that can be secured in the connection state every moment, and to reduce image deterioration. In order to achieve this, the reduction of the amount of information has been conceived as a method of sequentially deleting from the information of the image area which can be regarded as low importance as image information.

The basic configuration of the system of the present invention is shown in FIG. 1 and will be described. What is shown in FIG. 1A is a transmission side system, and what is shown in FIG. 1B is a reception side system. The transmission side system processes the image pickup apparatus 1 such as a video camera mounted on a moving body such as an ambulance and the image data to be transmitted when transmitting the image data output from the image pickup apparatus 1 to a medical facility or the like. And a transmitting device 2 for distributing and outputting to the next stage, and a PHS simple portable telephone terminal or a transmitting device 3 of the portable telephone terminal (hereinafter referred to as a portable terminal device) that wirelessly transmits the distributed image signal output from the transmitting device. Composed of. The receiving side system receives the transmission signal at the receiving unit connected to the public telephone line 4 and assigned with a plurality of telephone numbers, and converts the transmission signal distributed and transmitted through the plurality of telephone lines into one image signal. It is composed of a receiving device 5 for combining and outputting, and a display 6 for inputting the output image signal and displaying a reproduced image. When transmitting the image data, the transmitting device 2 tries to secure the communication line by causing the mobile terminal device 3 to call the receiving device 5 in advance by the telephone number assigned by the public telephone line network 4. The following operation assumes that one or more communication lines can be secured. Original image data taken by the video camera 1 is divided into secured communication lines and transmitted from one or more mobile terminal devices 3. At that time, the transmitter 2 is secured by the secured communication lines. By detecting the number and processing the image signal to be transmitted according to the total data transmission rate, the amount of image information to be transmitted should not exceed the upper limit of the data transmission rate secured at that time. adjust. By processing this image signal, the data to be transmitted to the mobile terminal device 3 is prevented from staying. Public telephone line 4
The data received by the receiving device 5 through
Is reproduced by being combined with the original image data at the time of transmission. By transmitting the reproduced image data to the display 6, the reproduced image can be viewed.

Next, a specific example of image processing for adjusting the most effective transmission image information within the upper limit of the data transmission rate secured at that time will be described. Although not shown in the figure, the method of reducing the amount of information is to send by making the pixel or scanning line density of the screen rough and the method of sending the image with a low update frequency (decimating the number of frames of the image). There is. The former method has the disadvantage that the image itself becomes rough, and the latter method has the disadvantage that the motion cannot be reproduced smoothly, but by changing one or both of these, the information amount of the image data to be transmitted can be secured. It can be adjusted within the upper limit of the transmission speed. Incidentally, if the update frequency of image information (generally 30 frames / second) is halved (15 frames / second), the data transmission rate required for image transmission is also halved. However, since this method is accompanied by the above-mentioned disadvantages, if it is simply applied, there arises a problem that the portion of the subject to be observed in the reproduced image on the receiving side is unclear or the movement cannot be observed realistically. Therefore,
In the present invention, this method is not simply applied, but the image information is effectively processed so that the reproduced image does not have the above-mentioned inconvenience and the image can be reproduced realistically while maintaining a clearer image. I tried to make adjustments and send it.

With reference to FIGS. 2A to 2E, a specific example of image processing for effectively processing and adjusting the image information transmitted within the upper limit of the secured data transmission rate will be described. In general, a camera captures an image of a main part of a subject in the center, and therefore, a description will be given here assuming a composition in which the subject, which is the main subject, fits in the center. In FIG. 2A, the screen is divided into three by two vertical boundary lines. When the effective data transmission rate that has been secured drops from the maximum value, the image information amount in the central area 11 is maintained,
If only the image information amount of the both side areas 12 is reduced, the total image information amount to be transmitted is reduced accordingly, but the reproduced image is the same as when the update frequency or density of the entire screen is uniformly reduced. On the other hand, since the reproduced image of the main part remains the original image, the impression of deterioration of the screen quality can be small. In the above example, the central area and the both side areas are simply divided into areas, but the idea of the present invention is that the importance of each area in the screen information is different as information. Since priority is given and when the transmission rate is limited, the amount of information is reduced from the lowest priority in accordance with the limitation, and thus finer area division can be considered. In the example of B of FIG. 2, the screen is divided into five by four vertical boundary lines. When the effective data transmission rate that has been secured drops from the maximum value, the density and update frequency are first reduced from the information in both side areas 12, and then the density and update frequency are reduced in the order of both intermediate areas 13 for transmission. It is possible to faithfully transmit the basic data of the image data of the central region 11 which is the main part of the image and reproduce the image while reducing the transmission information amount according to the speed. In the example of FIG. 2C, the screen is divided into three parts by two vertical boundary lines, and then the central region 11 is further divided into three parts by two horizontal boundary lines. The priority order of this division example is 11a → 11b, 11c → 12a, 12b. 2D
In the above example, the screen is divided into three by the boundary lines of two rectangles, and then the central rectangular region in the central region is further specified and divided. The priority order of this division example is 21 → 22 → 23a, 23b. In E of FIG. 2, the screen is divided into three by the boundary line of two circles. The priority of this division example is 31 → 32 → 33a, 33b
Has become. When the amount of information is dropped to the upper limit of the transmission rate secured in the above example, the priority is, of course, the opposite from the opposite priority. 2A to 2E show specific shapes and numbers of the boundary lines, the shapes and the numbers of the boundary lines are not limited to these, and it goes without saying that appropriate area division is possible. It is also possible to change the shape and number of border lines during communication,
It is possible to prepare a plurality of divided models and switch and apply them depending on the subject image to be transmitted at each time. 2A
With respect to the priority of each of the areas from E to E, the central area is emphasized, but the invention is not limited to this, and the central area may be neglected and the peripheral area or other areas may be emphasized. Further, it is effective to reduce the amount of data to be transmitted by patterning the shape and number of boundary lines for screen division, the density and update frequency of each divided area, and treating each with an identification code.

Next, a specific method for reducing and processing the image information amount will be described. FIG. 3 is a diagram schematically showing an intermittent transmission method in a corresponding area. The left is the original image, A1 ~ A4 (B1 ~
B4, C1 to C4, D1 to D4, E1 to E4) indicate image information of areas with high priority, and A1 to A4 (B1 to B4, C1 to C4, D1 to D4, 1 to 4)
Represents the image information of a low priority area, and each area image information block A1, A2, ..., A1, A2, ... Is a pixel signal group, and A1 to A4 or A1 to A4 are gathered together. It becomes all pixel information of the area in the image. As shown in FIG. 4, assuming that the pixels forming the image are arranged in the horizontal scanning direction and the vertical scanning direction, the pixel information at the position 1 corresponds to blocks A1, B1, C1, ... The pixel information at the position of 2 is the signal of 1, c 1 ..., and the pixel information at the position of 2 is blocks A2, B2, C2 ,.
C signal for pixel 2 and signal for position 3 are block A
Signals of 3, B3, C3, ..., A3, A3, C3 ... The pixel information at the position of 4 is the signal of blocks A4, B4, C4, ..., A4, B4, C4. . In FIG. 3, the right side of the original image shows the processing mode of the image to reduce the amount of image information within the transmission speed, the right side shows the mode of the image reproduced on the receiving side, and the vertical axis shows the time. It is an axis and the time course is shown in the downward direction. The first frame image (A1
~ A4, a1 ~ a4) are transmitted without any processing, but in the next frame the image information B1 of the high priority area is transmitted.
Although B4 remains unchanged, image information B1 to B4 of the low priority area is cut. The next frame is (C1-C
4, c1 to c4) are transmitted without any processing, and in the next frame, the image information D1 to D4 of the high priority area remains unchanged, but the image information of the low priority area ~ D 4
Has been cut. That is, in this example, if the calculation is performed by a simple example in which the information amount of each block in the original image is the same, which is a process in which the image information of the low priority area is cut in every other frame, The information amount of the processed image is reduced to 24/32, that is, 3/4. The reduced transmission information is edited as a reproduced image on the receiving side. As can be seen from the figure, the cut area information is interpolated by continuously adopting the information of one frame before. That is, cut a1 to a4, d
1 to 4 are replaced with the relevant area information A1 to A4 and C1 to C4 of all frames. If there is little change in the image in this area, the reproduced image is almost the same as the original image, and if it is not the observation center image, some distortion does not pose a problem.

FIG. 5 is a diagram schematically showing a data division transmission system of a relevant area, which is adopted to reduce the image information amount in the area of low priority. The left is the original image, A1-A4
Indicates the image information of the high priority area, A1 to A4 indicate the image information of the low priority area, and the right adjacent in the figure is the image processing to reduce the image information amount within the transmission speed. The morphology is shown, and the right side shows two forms of the image reproduced on the receiving side, the vertical axis is the time axis, and the lapse of time is shown in the downward direction. Image information (A1 to A4, B1 to B4, C1 to C4, D1 to D4, E1) of high priority areas shown in each row
~ E4) is sent without any processing. Image information of areas with low priority (A1 to A4, A1 to A4, U1 to U4, D1 to D4, O1
~ E 4) is not transmitted as it is, first the image information (I 1 to A 4, U 1 to U 4, D 1 to D 4) is cut, and the first frame area image information A 1 to A 4 Is divided into blocks, and image information (A1 to A4, B1 to B4,
C1 to C4, D1 to D4) are processed and transmitted in the form of being added to the information one by one. The image information e1 of the low priority area is added to the image information (E1 to E4) of the high priority area of the subsequent frame. In this example, if the calculation is performed by a simple example in which the information amount of each block in the original image is the same, the information amount of the processed image is reduced to 5/8 with respect to the original image information. This reduced transmission information is edited as a reproduced image on the receiving side. As can be seen from the figure, the image information of the area having a high priority in the reproduced image 1 is reproduced as it is as the original image, and the image information having a low priority is reproduced. The image information of the area is an image with a density of 1/4, that is, four adjacent pixels, which are shown in FIG.
Pixels at positions 2, 3 and 4 are reproduced with the same pixel information. Although this reproduction method has a problem that the image quality of the portion is slightly deteriorated, it is effective when observing a color change around the affected area and has an advantage that there is no time delay. The reconstructed image 2 is divided and sent sequentially for one frame of image information (A1 to A1)
If the information of 4) is prepared on the receiving side, it is adopted as the image information of the corresponding area, and the image information is repeatedly adopted until the image information for one frame of the next applicable area is prepared, thereby performing interpolation. In this reproducing method, although a delay of three frame times occurs in this case, an image in a low priority area is also reproduced when all pixel information (A1 to A4) is collected, so that image quality is not deteriorated. However, image information (I 1 to I 4, C 1
~ C4, D1 to D4) are cut, and instead of this, image information A1 to A4 will be repeatedly used for four frames, so when there is movement in this part, it is somewhat unnatural. However, there is practically no effect. In order to easily perform the above-described reduction processing of the image information amount on the transmission side and signal processing for reproduction on the reception side, it is effective to add address information to the image information divided for each area. Is. Further, when adopting the above-mentioned data intermittent transmission method or data division transmission method, it is convenient in terms of data processing to set the image information amount of the adjacent area to an integral multiple or an integral fraction.

In the description of the invention according to FIG.
Although the retention of data in the above is avoided, the point is that it is only necessary to be able to transmit an image conforming to real time, and it is possible to set a certain upper limit value (for example, 1 second) and allow it up to that point. is there. In the description of FIG. 1, the transmitting side is a mobile station such as an ambulance and the receiving side is a fixed station such as a medical facility. However, the combination is not limited to this, and appropriate variations such as mobile stations and bidirectional can be applied. Not limited to emergency medical systems, it can be widely applied as an image transmission system with mobile stations. Furthermore, in the explanation of FIG.
Although the original image data is generated by the video camera 1, the original image data is not limited to this. For example, it may be output from a video recording device connected to the video camera. Further, in the description of FIG. 1, the reproduced image data is sent to the display 6, but the present invention is not limited to this and may be, for example, a video recording device. In addition, it is natural that using a general image compression technique together is effective as a method of reducing the image information to be transmitted.

[0013]

[Embodiment 1] FIG. 6 shows an embodiment of the present invention. An ambulance communication system equipped with a video camera 1 for photographing the condition of an emergency patient and usually equipped with means capable of transmitting a captured image to a medical facility using satellite communication, which is switched when satellite communication is difficult to use. As communication means that can be used, a controller 7 that includes a plurality of mobile phones 3 and operates the plurality of mobile phones, and image information from the video camera 1 is input, and according to a secured transmission rate that changes momentarily. It is composed of a transmitting device 2 which processes valid image information and distributes and outputs it to each mobile phone 3. The controller 7 has a function of calling a corresponding telephone of a medical facility to connect to the mobile phone 3 which is not line-connected, and a function of monitoring the number of connected lines at the present time and outputting the number to the transmitter 2. ing. An antenna 8 is used as a common antenna for the plurality of mobile phones 3. The communication speed required to send moving images according to the standard is 2 Mbps,
In the case of mobile phones, the amount of information that can be sent with one line is 9.6 Kbps. In the case of PHS, the amount of information that can be sent by one line is 32 Kbps, which is advantageous over the mobile phone in this respect, but there is a limit that the number of lines that can be sent by one ground station antenna is three, except for some. Although the PHS and the mobile phone can be used together, the mobile phone is adopted in this embodiment.
FIG. 7 shows a detailed configuration of the transmission device 2, which is the heart of this embodiment. The video signal output from the video camera 1 is transmitted to the 1-frame memory 22 via the 1-frame memory 21 and the means 23 for delaying for 1/30 seconds. 1 frame memory
With respect to the continuous frame information accumulated in 21 and 22, the degree of correlation is detected by the image correlator 24 for each divided image area, and the correlation level is output corresponding to the image area. The image signal processing means 25 in the next stage has a computer function, and outputs the image correlator 24 and the controller 7.
When the connection line number information from is input, the upper limit of the currently secured data transmission rate is calculated from the connection line number information, and when the original image information cannot be transmitted as it is, the image correlator 24 An image in a region having a high degree of correlation according to the output is subjected to a process of cutting from the transmission information on the transmitting side so that the receiving side replaces the same region image of the previous frame image. The image information amount to be cut is sequentially executed starting from an area having a high degree of correlation until the image information amount falls within the upper limit of the currently secured data transmission rate. The area to be cut intermittently and the cutting frequency are adjusted so that it falls within the upper limit transmission rate. The method of reducing the amount of information in this embodiment is based on the idea that an image with little motion in moving image transmission can be treated as a still image, and an image in a region without motion is the same as the previous frame image. This method, which is interpolated by, can be reproduced as a natural moving image close to the original image.

[0014]

The data multiplexing radio communication system of the present invention is a system for transmitting moving picture information through a plurality of radio telephones, and the upper limit of the data transmission rate based on the number of telephone lines secured at the time of transmission. Means for detecting the divided image information, a means for dividing the image information into a plurality of areas of the image, and the upper limit of the secured data transmission rate does not satisfy the transmission rate at which the original image data can be transmitted in real time. Since it is provided with an image information processing unit that intermittently rejects the image data of the low priority area from the transmission information, the real-time moving image can be displayed within the upper limit of the secured data transmission rate. Can be effectively sent. Further, the means for dividing the image information into a plurality of areas divides the image information into a plurality of areas from the central area to the peripheral area, and the priority of determining the image area to be cut is determined based on the area far from the image center. Alternatively, a means for comparing the image information and the image information of the previous frame for each divided area is provided to detect the degree of correlation, and the low priority for determining the image area to be cut is based on the data of the area having a high degree of correlation. By deciding, it is possible to reproduce a high-quality image that is not deteriorated on the receiving side.

In the data multiplexing radio communication system of the present invention, the processing of image information which intermittently rejects the image data of the area having the lower priority in the divided image information from the transmission information is intermittently adopted. A method of intermittently transmitting the image data of the area as it is and a method of dividing and transmitting the image data are prepared, and both methods are used so that the image information can be transmitted most effectively according to the upper limit of the data transmission rate secured at that time. By adopting a configuration in which they are appropriately combined, it is possible to transmit a real-time moving image of good quality with a full amount of information within the upper limit of the secured data transmission rate. The amount of image data used as transmission information in the image information processing means has a relation of an integral multiple or an integer fraction of the image data of an adjacent region, and the divided image information is given an address corresponding to the corresponding region. As a result, it becomes possible to easily execute the processing and transmission of the image signal, and further the reproduction of the image on the receiving side. Then, the data multiplexing wireless communication system of the present invention is mounted on a mobile body that captures the condition of a patient with a video camera and transmits the moving image information to a remote medical facility by satellite communication, thereby the state of satellite communication. Even when the situation is bad, the transmission function can be fulfilled as an alternative communication means, and an efficient image signal is transmitted according to the effective transmission rate upper limit of the communication line corresponding to the connection status of the communication line every moment. In addition, the receiving side can stably reproduce a high quality screen in real time.

[Brief description of drawings]

FIG. 1 is a diagram showing a basic configuration of a data multiplexing wireless communication system of the present invention.

FIG. 2 is a diagram showing an example in which an image is divided into areas in which a central portion has a high priority in the present invention.

FIG. 3 is a diagram illustrating the principle of an intermittent transmission system which is an image processing system of the present invention.

FIG. 4 is a diagram illustrating a relationship between information of a region image block and a pixel position in the present invention.

FIG. 5 is a diagram illustrating the principle of a division transmission method which is an image processing method of the present invention.

FIG. 6 is a diagram showing a basic configuration of one embodiment of the present invention.

FIG. 7 is a block diagram illustrating a detailed configuration of a transmission device according to an embodiment.

[Explanation of symbols]

1 Video camera 3 Mobile terminal device 2 transmitter 4 public telephone line 21,22 1 frame memory 5 Receiver 23 Delay means 6 Display 24 Image correlator 7 Controller 25 Image signal processing means 8 Antenna 26 Output terminal

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) // A61G 12/00 H04B 7/26 P 109M F term (reference) 4C341 LL10 LL30 5C054 AA02 AA05 AA10 CA04 CC03 DA07 DA09 EA03 ED11 HA24 5C064 AA06 AC04 AC12 AD02 AD14 AD18 DA10 DA12 DA14 5K067 AA21 BB04 BB21 DD11 DD52 EE02 EE10 EE16 FF23 FF25 HH22 KK15 5K101 KK20 LL12 NN06 NN18 NN21 QQ07 SS01

Claims (8)

[Claims] 1. A system for transmitting moving image information via a plurality of wireless terminals, and means for detecting an upper limit of a data transmission rate based on the number of communication lines secured at the time of transmission,
A means for dividing the image information into a plurality of areas of the image, and when the secured upper limit of the data transmission rate does not satisfy the transmission rate at which the original image data can be transmitted in real time, the priority of the divided image information is low. A data-multiplexing wireless communication system comprising image information processing means for intermittently cutting image data of an area from transmission information. 2. A means for dividing the image information into a plurality of areas divides the image information into a plurality of areas from the central area to the peripheral area, and the priority for determining the image area to be cut is determined based on the distance from the image center. The data multiplexing wireless communication system according to claim 1. 3. A means for detecting the correlation by comparing the image information and the image information of the previous frame for each divided area, and the priority of determining the image area to be cut is low in the data of the area having the high correlation. The method according to claim 1, characterized in that
A data multiplexing wireless communication system as set forth in. 4. A method of intermittently transmitting the image data of the area, which is intermittently adopted, for the processing of the image information, in which the image data of the area of low priority in the divided image information is intermittently cut from the transmission information. A method of dividing and transmitting is prepared, and one or both methods are appropriately combined so that the image information can be transmitted most effectively according to the upper limit of the data transmission rate secured at that time. 4. The data multiplexing wireless communication system according to any one of Items 1 to 3. 5. The amount of image data per unit time or per unit area of each area adopted as transmission information in the image signal processing means has a relation of an integral multiple or an integral fraction of the image data of other areas. Item 5. The data multiplexing wireless communication system according to Item 4. 6. The data multiplexing wireless communication system according to claim 1, wherein an address corresponding to the corresponding area is added to the divided image information. 7. The data multiplex wireless communication system according to claim 1, wherein an identification code is attached to each type of image division pattern and registered as system information. 8. A communication system mounted on a mobile body for imaging the condition of a patient with a video camera and transmitting the moving image information to a remote medical facility by satellite communication. The data multiplex wireless communication system according to any one of claims 1 to 6, which is installed in a mobile unit as a communication unit.