JP2006332741A - Image transmission-reception display system, and image transmission-reception display method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image transmission-reception display system for displaying the identical image in synchronism with each other on the transmission side and the receiving side, when transmitting a still image to a display device, located at a remote place and displaying the still image on the display device. <P>SOLUTION: The transmitter includes a transmitting section (107) for transmitting a compressed image; and control sections (108, 109) for displaying the image on a display section, and the receiver includes an expansion section (202) for expanding the compressed image transmitted from the transmitting apparatus; an image detection section (204) for detecting the coordinate position of an initial pixel and that of a final pixel of part or all of the expanded image; and a transmitting section (203) for transmitting the coordinate positions detected by the image detection section, to the control section of the transmitter. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a system for transmitting an image through a network and displaying the image, and more particularly to a technique for displaying the same image on a transmission side and a reception side.

  In recent years, with the spread of digital cameras, photograph data taken by individuals has been digitized and stored in a storage device. In order to display data stored in a storage device, a conventional method is to display it on the display of a personal computer (hereinafter referred to as a personal computer). Since it is difficult for those who are not familiar with the operation, recently television receivers that can display still image data of an IC card have also appeared.

However, considering the situation of displaying and viewing photos, you can not only enjoy watching photos taken by yourself, but also enjoy viewing and communicating with other people such as friends and relatives. It is clear from experience that there are many.
To send a still image to another person, you can burn the still image into a photo or CD and send it by mail, or send it as an e-mail attachment using a personal computer, or send the data to the server if the capacity is large. Then, you can download it. However, the method of sending photos and CDs using postal mail has the advantage that anyone can use it, but it takes time to send. Also, the method of using a personal computer cannot be used by those who cannot operate the personal computer.
In addition, in the method of sending photos in advance, how to see the still image sent to the other party for the purpose of watching and chatting with other people in remote places. I couldn't figure it out and it was hard to use.

  In order to solve these problems, a system combining a television receiver and a telephone as shown in FIG. 9 can be considered. Add the communication function to the TV receiver with the function to display the still image data described above, send the still image data via the network, specify the other party's TV receiver directly, and control the display from the transmission side Then, a still image may be displayed. A telephone is used together as a communication means at this time. In this way, you can enjoy chatting with grandchildren from the countryside who can't use a computer while watching photos of your grandchildren.

However, in the currently popular network environment, there are those where the uplink communication speed is slower than the downlink communication speed, and it takes time to transmit large-capacity high-definition image data. However, there is a problem in that the delay between the transmission of an image and the display of the image on the recipient's terminal cannot be ignored.
Therefore, when displaying an image, there is also an image display method in which a rough image such as a thumbnail is first transmitted and displayed on the screen, and then the original high-definition image is sequentially displayed as the reading of the image data proceeds. It has been proposed (see, for example, Patent Document 1). In this way, it is possible to avoid being aware of the waiting time due to image transmission to some extent.
Japanese Patent Laid-Open No. 11-345242 (2nd page, FIG. 2)

  However, in order to communicate, it is necessary for the transmitting terminal to display the same still image as the image transmitted to the receiving terminal. If you do not consider the synchronization of the display on the sending terminal and the display on the receiving terminal, both display at the best speed, the resulting image displayed on the sending terminal will be It is not displayed, and it is impossible for the transmitting side to know what is displayed on the receiving side terminal. Therefore, when considered as a communication tool, there is a problem that it is difficult to talk because images are not synchronized on the transmission side and the reception side.

  Therefore, the present invention has been made to solve the above-described problems, and displays a still image owned by a receiving display device at a remote location at high speed without being aware of waiting time, and is transmitted. An object of the present invention is to provide an image transmission / reception display system that displays the same image as the display device on the side in synchronization.

In a first aspect of the present invention, a compressed image transmitted from a transmitting device via a network is received by a receiving device, and a part or all of the decompressed image is displayed on a display unit of the receiving device. The same image as part or all of the image displayed on the display unit is displayed on the display unit of the transmission device, and part or all of the image displayed on the display unit of the transmission / reception device is visually recognized. While sending and receiving voice calls
The transmission device includes a transmission unit (transmission unit 106) that transmits the compressed image, and a control unit (response reception unit 107, display control unit 108) that displays the image on a display unit,
The reception device includes a decompression unit (expansion unit 202) that decompresses the compressed image transmitted from the transmission device, and a coordinate position between a part or all of initial pixels and final pixels of the decompressed image. And an image detection unit (response generation unit 204) that detects the image and a transmission unit (transmission unit 203) that transmits the coordinate position detected by the image detection unit to the control unit of the transmission device. A transmission / reception system is provided.
According to a second aspect of the present invention, a receiving device receives a compressed image transmitted from a transmitting device via a network, displays a part or all of the decompressed image on a display unit of the receiving device, and causes the display unit to display the compressed image. Transmission / reception in which the same image as a part or all of the displayed image is displayed on the display unit of the transmission device, and a voice call is performed while viewing part or all of the image displayed on the display unit of the transmission / reception device In the method
The compressed image is transmitted (step S14), the transmitted image is decompressed (step S16) and displayed on the display unit of the receiving apparatus (step S17), and then the decompressed image is displayed. The coordinate positions of some or all of the initial pixels and the final pixels are detected (step S18), and the detected coordinate positions are transmitted to the transmission device (step S19) and displayed on the display unit of the transmission device. And a transmission / reception method characterized by being performed (step S11).

According to a first aspect of the present invention, the transmission device includes a transmission unit that transmits the compressed image, and a control unit that displays the image on a display unit, and the reception device includes the transmission device. An expansion unit that expands the compressed image transmitted from the image detection unit, an image detection unit that detects a coordinate position of a part or all of initial pixels and final pixels of the expanded image, and the image detection unit. A transmission unit that transmits the detected coordinate position to the control unit of the transmission device;
In a second aspect of the invention, the compressed image is transmitted, the transmitted image is expanded and displayed on the display unit of the receiving device, and then a part or all of the expanded image is displayed. Since the coordinate position of the initial pixel and the final pixel is detected, the detected coordinate position is transmitted to the transmission device, and is displayed on the display unit of the transmission device.
Image transmission in which the same image is displayed synchronously on the transmission side and the reception side can be performed. For this reason, even if a narrow-band network is used, communication can be performed while the same image is displayed synchronously, so that it is possible to provide a fun TV as a communication tool that is not conscious of waiting time due to image transmission. Furthermore, according to the present invention, since all the image display is controlled on the transmission side, even when a person unaccustomed to the machine operates on the reception side, there is an effect that communication can be performed without imposing a burden. .

  First, an image handled in this embodiment will be described. In order to display an image at a high speed on the receiving terminal, it is effective to reduce the communication amount. Since images are generally recorded and transmitted in an image compression format such as JPEG, the amount of communication cannot be reduced by image compression. Originally, the size of an image recorded by a digital camera or the like does not necessarily match the image size necessary and sufficient for display on a display. When the image size sufficient for displaying on the display is smaller than the recorded image size, it is possible to reduce the communication amount by resizing and recompressing the image. However, the image size sufficient to be displayed on the display is, for example, about 1920 dots × 1024 dots, and the compressed image capacity at this time is about 500 Kbytes, and it is difficult to send it instantaneously by communication. Also, a compression processing time is required when the re-compression after resizing is realized by software.

  Further, the image size sufficient for displaying on the display and the image size necessary for understanding the image contents are not the same. For example, in a low resolution mode of a DVD disc, an image of about 320 × 240 dots is used, and an image size of this level is sufficient to understand the contents. Therefore, when a display instruction is issued at the transmitting terminal, the problem is solved by first sending the image at a low resolution, displaying the image on the receiving terminal in a short time, and then sending the high resolution image to the receiving terminal again. . An image of about 320 × 240 dots can be processed at a sufficiently high speed for both recompression and communication time. Hereinafter, an image of about 320 × 240 dots is referred to as a reduced image, and an original size image captured by a digital camera or the like is referred to as an original image.

Next, an outline of the present embodiment will be described. The image transmission / reception display system of this embodiment is premised on a system (see FIG. 9) that combines a telephone and a television for transmitting images while communicating as described in the background art. In particular, a television displays still image data. Assume that a network-compatible transmission / reception terminal is added to a TV receiver with functions.
In the following description, only the configuration and operation of the transmitting terminal and receiving terminal that are directly related to the present invention will be described, and the general operation of the television and the telephone will not be described.
Another object of the present embodiment is to transmit and display image data at a high speed on the receiving terminal side, and to synchronize the image display on the transmitting terminal and the image display on the receiving terminal. In order to increase the display speed, as in the conventional example, a reduced image that can be recognized by the receiving terminal is displayed first, and then a high-definition original image is sequentially displayed as data arrives. . Further, in the first pass, control is performed so that the image display of the transmission terminal proceeds in synchronization with the image display of the reception terminal, which is a feature of the present invention.

  Based on the above assumptions, an image transmission / reception display system according to each embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram of an image transmission / reception display system according to the present invention. (A) is a transmission terminal of the image transmission / reception display system, and (B) is a reception terminal (Example 1). FIG. 2 is a configuration diagram showing transmission data and response data in the image transmission / reception display system of the present invention (Example 1). FIG. 3 is a flowchart showing the transmission / reception operation in the image transmission / reception display system of the present invention, where (A) is a transmission-side remote control operation, (B) is a reception-side remote control operation, (C) is a transmission-side operation, and (B). Indicates the operation on the receiving side (Example 1). FIG. 4 is a flowchart showing details of the transmission processing operation on the transmission side in pass 1 of the image transmission / reception display system of the present invention (Example 1). FIG. 5 is a diagram showing the correspondence between the display contents of the receiving terminal and the response data in the image transmission / reception display system of the present invention (Example 1). FIG. 6: shows the block diagram of the image transmission / reception display system in embodiment of this invention, (A) is a transmission terminal of an image transmission / reception display system, (B) is a receiving terminal (Example 2). FIG. 7 is a configuration diagram showing transmission data and response data of the image transmission / reception display system of the present invention (Example 2). 8A and 8B show transmission / reception operations in the image transmission / reception display system of the present invention. FIG. 8A is a flowchart showing operations on the transmission side, FIG. 8B is a flowchart showing operations on the reception side, and FIG. . (Example 2)

The main part of the image transmission / reception display system of the present invention is composed of a transmission terminal 100 and a reception terminal 200 as shown in FIGS.
The transmission terminal 100 reads the compressed data of the original image of the still image from the storage device 150 such as an IC card, and determines whether the read data is to be processed in the first pass or the second pass. A process selection unit 102 for selecting, a decompression unit 103 for decompressing the read data, a reduced data generation unit 104 for converting the decompressed original image into a reduced image, a compression unit 105 for compressing the reduced image, and transmission data generation from the reduced image compressed data The transmission unit 106 that transmits to the receiving terminal, the response receiving unit 107 that receives the response data from the receiving terminal, and the display unit 151 that generates display data from the data of the response receiving unit and the decompressing unit The display control unit 108 displays an image. Note that the data from the decompression unit 103 is temporarily stored in the buffer 109 by the display control unit 108 until it is displayed.
The receiving terminal 200 includes a receiving unit 201 that receives transmission data from the transmitting side, a decompressing unit 202 that decompresses received image compression data, and a display unit that displays decompressed image data in a size suitable for the display device 251. 205, a response generation unit 204 and a transmission unit 203 for notifying the transmission terminal of the display position of the image data.

Next, FIGS. 2A and 2B show configuration examples of transmission data from the transmission side and response data from the reception side used in transmission and reception. The transmission data is composed of path information indicating whether data transmitted in each transmission unit is data of the first pass or data of the second pass, image size information, and compressed image data. The response data includes path identification information of data received at the receiving terminal and display position data indicating the coordinate position range of the received and displayed image.

Next, remote control operations on the transmission side and the reception side when images are transmitted and displayed will be described with reference to the flowcharts shown in FIGS.
On the transmission side, the television is set to the transmission setting mode (step S1), and connection with the reception side is performed (step S2). Then, the compressed image data is read from the storage device 150 (step S3), and a transmission image is designated (step S4). In transmission image designation, a plurality of images are designated from thumbnails. Then, the television is set to the image transmission display mode (step S5).
The receiving side receives a telephone call from the transmitting side, sets the TV on the receiving side to the image receiving display mode (step S8), and connects to the transmitting side (step S9).
The transmission side issues a transmission instruction (step S6) and repeats the transmission instruction until there are no more images to be transmitted while talking over the telephone (step S7).
As described above, the receiving side simply sets the television in the image receiving display mode and connects to the transmitting side, and all image transmission and image display are controlled on the transmitting side, so that no operation is required on the receiving side.
Note that the connection method between the transmission side and the reception side may be a method in which the transmission side specifies the number of the reception terminal and places a call, or a method in which a common ID is input and connected between the transmission side and the reception side. However, any method may be used in the present invention.

Next, the operation of the transmission / reception terminal that enables the transmission / reception operation will be described.
The transmission terminal 100 starts the transmission side routine shown in FIG. 3C in accordance with the instruction from the remote controller, and transmits the first image data as described later (steps S12, S13, S14). At this time, when transmission starts in the image transmission display mode, the display device on the transmission side is temporarily erased (step S10) to match the reception side.

Further, the transmission side routine is started every time response data is received from the reception side, performs image display on the transmission side as will be described later (step S11), and data as described below until there is no data to be transmitted. Send. That is, the data reading unit 101 reads the compressed data of the original image of the designated image from the storage device 150 (step S12), and transmits the transmission consisting of the path, size, and compressed image data corresponding to the path determined by the process selection unit 102. Data is created (step S13), and the transmission unit 106 transmits the transmission data to the reception side (step S14).

Next, the transmission operation of the first pass will be described in detail according to the processing unit with reference to the flowchart shown in FIG.
The data reading unit 101 reads the compressed data of the original image of the designated image (step S20). The read compressed data is expanded to the original image by the expansion unit 103 (step S21). The image size after expansion is the original image size taken with a digital camera or the like. Here, the expansion is not performed on the entire image at once, but is performed for each processing unit (slice) of the compressed data. The processing unit is one line or several lines (for example, four lines). That is, the following processing is performed in units obtained by slicing the original image in the horizontal direction.
The expanded original image data of the processing unit is sent to the display control unit 109 and the reduced data generation unit 104 (step S23). Display processing in the display control unit 108 will be described later.
The reduced data generation unit 104 converts the size of the original image data into reduced image data (step S24). Note that there are cases where the size cannot be converted from original image data in a processing unit to reduced image data. For example, when the original image is 2048 × 1536 dots and the reduced image is 320 × 240 dots, 6.4 pixels of the original image correspond to one pixel of the reduced image, and therefore, four lines, that is, 2048 × 4 dots are input as a processing unit. Is input to the reduced data generation unit, the output is one line or less, and the process cannot be performed. Even if the output corresponds to one line or more, as the processing of the reduced data generation unit, when a high-quality reduced image is generated by a filter, input data larger than the processing range is required, and thus output cannot be performed. In some cases. In these cases, the data is held inside the reduced data generation unit, and reduced data is generated together with the data input once or before (step S22).
In the compression unit 105, the data output from the reduced data generation unit 104 is image-compressed and output (step S26). In the compression unit as well as the reduced data generation unit, the input data is held inside until the data necessary for generating the compressed data is input, and is output from the compression unit when the necessary data is available. (Step S25). That is, the processing unit input to the reduced data generation unit 104 and the processing unit of data output from the compression unit 105 do not necessarily match.
The compressed reduced image data output from the compression unit 105 is transmitted to the reception terminal 200 by the transmission unit 106 (step S27).
The above operation is repeated until there is no transmission data (step S28), and the process ends.
In the second pass, after all the processes of the first pass are completed, the process of simply transmitting the read data from the transmission unit 107 to the reception terminal 200 is performed.

Next, the image display operation on the transmission side will be described. When the response terminal 107 receives and reads the response data from the reception terminal 200 by the response reception unit 107, the transmission terminal 100 starts the transmission side routine shown in FIG. The transmission side routine is started each time response data is received, except for the initial state. Then, the display control unit 108 first displays the image on the transmission side in accordance with the coordinate information of the display position of the response data (step S11). In the case of the first pass, display is performed based on the coordinates obtained by converting the coordinates of the reduced image at the display position of the response data into the display position of the original image. The original image data whose display position is specified by the response data has already been generated by the decompression unit 103 and temporarily stored in the buffer 109. The display control unit 108 reads the image at the coordinate position received by the response data receiving unit 107 from the buffer, sends it to the display device 151, and deletes the displayed original image from the buffer. When the size of the original image data and the image size that can be displayed on the display device 151 are different, the display control unit 108 performs resizing for display.

Next, the operation on the receiving side will be described with reference to the receiving side routine shown in FIG. Receiving terminal 200 starts a receiving side routine when receiving unit 201 receives transmission data from a transmitting terminal. This reception side routine is activated every time transmission data is received.
First, the compressed image data received by the decompression unit 202 is decompressed, and the display unit 205 creates image display data including an original image or a reduced image (step S16). Since the size of the expanded image is described at the head of the compressed image data, it is necessary to resize the image if the image size does not match the size of the display screen.
Then, the image is displayed on the display device 251 (step S17).
Note that the receiving unit does not send data to the decompression unit after all of the reduced image compressed data for the first pass and the original image compressed data for the second pass are gathered, but sends data to the decompression unit in units of receiving data. . In the decompression unit, decompression data is output in units of rectangles sliced in the horizontal direction, sent to the display unit, and displayed as an image.
The response generation unit 204 creates response data including the path and the display position of the displayed image (step S18), and transmits the response data to the transmission terminal via the transmission unit 203 (step S19).

The display position is, for example, one in which a rectangular area of the expanded image is designated by the first and last line numbers. In the case of the reduced image in the first pass, the coordinates of the display position (line number) are the coordinates of the reduced image.
Next, the coordinate data of the display position will be described in detail by taking as an example a case where an original image of 2560 × 1920 dots is transmitted as a reduced image of 320 × 240 dots. The 320 × 240 dot reduced and compressed data sent in the first pass is decompressed by the decompression unit 202 and sent to the display unit 205. At this time, the data of 320 × 240 dots of the entire image is not expanded at a time, but data of 320 dots in width and any number of lines in the vertical direction is sequentially generated based on the data sequentially received by the receiving unit 201. The
As an example, it is assumed that the decompression unit 202 first outputs 320 × 70 dots, then 320 × 40 dots, and then 320 × 70 dots. An example of an image and response data displayed on the receiving side at this time is shown in FIG. When the first 320 × 70 dot image is input to the display unit, 70 lines of images indicated by the image 301 are displayed on the receiving side, and response data 311 indicating 0 to 69 lines is generated and transmitted. Sent to the side. When the next 320 × 40 dot image is input, an image for 40 lines is additionally displayed as shown in an image 302, and response data 312 indicating 70 to 109 lines is transmitted, followed by 70 lines. The image is additionally displayed, and response data 313 indicating lines 110 to 179 is transmitted.

Then, by repeating the above response / transmission, the transmission terminal 100 stops the transmission side routine when the transmission of all the image data is completed, ends the transmission instruction by the remote control, and waits for the transmission instruction of the next image. .

As described above, according to the first embodiment of the present invention, the display control unit 108 displays the transmission terminal image after receiving the coordinates of the display position displayed on the reception terminal 200 as response data. For this reason, even when the network load is heavy or the network speed is slow, before the data sent from the transmission terminal 100 to the reception terminal 200 is displayed on the reception terminal 200, the operation on the reception terminal 200 side for the original image is performed. Explaining to the person will not happen.
In addition, in the first pass, image expansion, reduction, compression, transmission, and display on the transmission terminal are inseparably performed, so that the transmission terminal 100 and the reception terminal 200 can be synchronized and displayed at high speed.

In the second embodiment, a cache is provided in the receiving terminal and image data is temporarily stored, so that once transmitted image data can be returned to the previously displayed image without being transmitted again. The others are the same as in the first embodiment. Hereinafter, a description will be given with reference to FIGS.

The transmission terminal 100 includes a data management unit 110 in addition to the configuration of the first embodiment. The data management unit adds a data ID, which will be described later, to the series of data to be transmitted, and controls from the start to the end of transmission of the series of data according to an instruction from the remote controller.
The reception terminal 200 has a reception management unit 209 in which a cache data management function is added to the function of the reception unit 201 in addition to the addition of the cache 210 to the configuration of the first embodiment.

This transmission data reuse function is implemented as follows using the data ID and flag in the transmission data and response data shown in FIG.
The transmission data is obtained by adding a data ID to the transmission data of the first embodiment. The data ID is a unique number indicating the image data managed for each data from the start to the end of communication, and is incremented for each transmission data in accordance with the order of sending the image data. However, the same data ID is used for the same data.
In addition to the response data of the first embodiment, the response data includes a data ID and a flag indicating whether the image data next to the data ID is on the cache by the reception management unit 209.

The sender designates an image with the remote controller and instructs the display device on the receiving side to transmit and display it. Then, the data management unit 110 on the transmission side starts the transmission side routine shown in FIG. 8A in accordance with the instruction from the remote controller, and transmits the first image data.
The transmission side routine is started each time response data is received, except for the initial state. First, display processing (step S31) on the transmission side is performed in accordance with the display position information. Next, the transmission data is read (step S32), and the transmission data including the path, the data ID, the data size, and the image data is created (step S33). The transmission data refers to the response data flag (step S34), and if there is image data, the image data is deleted (step S35) and transmitted to the receiving side (step S36). However, in the first transmission, the flag is set to 0 in the initial setting (step S30), and the image data is inserted and transmitted.
The reception side routine is shown in FIG. This reception side routine is activated every time transmission data is received, and first, the presence / absence of image data on the cache is determined from the data ID of the received transmission data (step S41). If the image data is not in the cache, the transmission data is stored in the cache (step S42). The transmission data at this time may be stored in the cache 210 as long as the capacity permits. If it is in the cache, the image data is read out from the cache (step S43). Thus, image data is prepared, display data is created (step S44), and the image data is displayed as an image (step S45), as in the conventional example. Then, display response data including the path, the data ID, and the display position of the displayed image is created (step S46). Next, it is checked whether the next image data of the image data is on the cache (step S47). For this purpose, it is only necessary to check whether there is image data of the data ID next to the data ID. If not, the flag is set to OFF (0) (step S48), and if present, the flag is set to ON (1) (step S49) to complete the response data. Then, response data is transmitted (step S50).
FIG. 8C shows the relationship between the response data flag and the presence / absence of image data in the transmission data.
Then, by repeating the above response / transmission, when all the image data transmission is completed, the data management unit 110 on the transmission side stops the transmission routine and ends the transmission display instruction by the remote controller.

As described above, according to the second embodiment of the present invention, once transmitted image data can be returned to the previously displayed image and displayed without being transmitted again. For this reason, the processing speed is improved by reducing the transmission data amount.
If the image data exists in the reception-side cache, pass 1 may be omitted and a high-definition image of the original image may be directly displayed.

In the embodiment of the present invention, the display position on the reception side of the transmitted image is detected on the reception side, the coordinate position is returned to the transmission side, and the image is displayed based on the coordinate position on the transmission side. Conversely, the display position of the image of the packet to be transmitted in advance is detected on the transmission side, the coordinate position is stored together with the ID of the packet, and it is confirmed that the packet is correctly received on the reception side. Even if the image of the packet is displayed on the display device on the transmission side, the same image can be displayed synchronously on the transmission side and the reception side.
Further, although an example of 320 × 240 dots has been given as a reduced image, the reduced image size is not necessarily limited to 320 × 240 dots due to the display resolution, communication speed, and processing capabilities of the transmission terminal and the reception terminal. When the display screen is small, a 160 × 120 dot thumbnail image is extracted from DCF format photo data and directly used as a reduced image, thereby simplifying the transmission apparatus.

The block diagram of the image transmission / reception display system in embodiment of this invention is shown, (A) is a transmission terminal of an image transmission / reception display system, (B) is a receiving terminal. Example 1 It is a block diagram which shows the transmission data and response data in the image transmission / reception display system of this invention. Example 1 FIG. 6 is a flowchart showing transmission / reception operations in the image transmission / reception display system of the present invention, where (A) is a transmission-side remote control operation, (B) is a reception-side remote control operation, (C) is a transmission-side operation, and (B) is a reception-side operation. The operation is shown. Example 1 It is a flowchart which shows the detail of the transmission processing operation of the transmission side in the path | pass 1 of the image transmission / reception display system of this invention. Example 1 It is a figure which shows a response | compatibility with the display content of a receiving terminal, and response data in the image transmission / reception display system of this invention. Example 1 The block diagram of the image transmission / reception display system in embodiment of this invention is shown, (A) is a transmission terminal of an image transmission / reception display system, (B) is a receiving terminal. (Example 2) It is a block diagram which shows the transmission data and response data of the image transmission / reception display system of this invention. (Example 2) The transmission / reception operation in the image transmission / reception display system of the present invention is shown, (A) is a transmission side operation, (B) is a flowchart showing the reception side operation, and (C) is transmission / response data. (Example 2) 1 shows a basic configuration diagram as a premise of an image transmission / reception display system of the present invention. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Transmission terminal, 101 Data reading part, 102 Process selection part, 103 Expansion | decompression part, 104 Reduction | restoration data generation part, 105 Compression part, 106 Transmission part, 107 Response reception part, 108 Display control part, 109 Buffer, 150 Storage device, 151 Display device, 200 reception terminal, 201 reception unit, 202 decompression unit, 203 transmission unit, 204 response generation unit, 205 display unit, 251 display device

Claims (2)

When the compressed image transmitted from the transmitting device via the network is received by the receiving device, and a part or all of the decompressed image is displayed on the display unit of the receiving device, the image is displayed on the display unit. In a transmission / reception system that displays the same image as a part or all of the image on the display unit of the transmission device and performs a voice call while visually recognizing part or all of the image displayed on the display unit of the transmission / reception device,
The transmitter is
A transmitter for transmitting the compressed image;
A control unit for displaying the image on a display unit,
The receiving device is:
A decompression unit for decompressing the compressed image transmitted from the transmission device;
An image detection unit for detecting a coordinate position of a part or all of initial pixels and final pixels of the expanded image;
A transmission unit that transmits the coordinate position detected by the image detection unit to a control unit of the transmission device;
A transmission / reception system comprising: A compressed image transmitted from a transmitting device via a network is received by a receiving device, a part or all of the decompressed image is displayed on a display unit of the receiving device, and the image displayed on the display unit is displayed. In the transmission / reception method of displaying a part or all of the same image on the display unit of the transmission device and performing a voice call while visually recognizing part or all of the image displayed on the display unit of the transmission / reception device,
The compressed image is transmitted, and the transmitted image is decompressed and displayed on the display unit of the receiving device. Next, a part or all of the initial pixel and the final pixel of the decompressed image are displayed. Detect the coordinate position,
A transmission / reception method comprising: transmitting the detected coordinate position to the transmission device and displaying the coordinate position on a display unit of the transmission device.

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