JP4570602B2 - Image alternative display method, image alternative display system, and terminal device used in the system - Google Patents

Description

  The present invention relates to an image alternative display method capable of avoiding waiting for display or waiting due to packet delay as much as possible by displaying a divided temporary image when displaying a homepage with a full browser on a mobile terminal or the like, The present invention relates to an image alternative display system and a terminal device used in the system.

  When displaying a homepage on the WEB on a mobile terminal device, if there are large images or many images depending on the communication mode, when a delay occurs in the communication, the communication is kept waiting and the screen is not updated. If an image exceeding the processing capability of the mobile terminal device is included, the service is not provided. In some cases, the mobile terminal device itself hangs up.

Various methods for communication of downloading a home page from a server device, configurations of the server device and a mobile terminal device have been proposed.
Patent document 1 relates to a portable information terminal system in the case of sending pictograms between mobile phone terminals by e-mail, and the transmission source mobile phone terminal itself creates pictograms instead of pre-registered pictograms. We propose an image transmission / reception method for sending images to the network. In response to user input information, bitmap data and color information associated therewith, pictograms are reproduced on the destination mobile phone terminal.
This proposal is assumes the Turkey sent all information by the packet, the image size is large reception environment is not smoothly received in the destination portable telephone terminal because bad is not considered.

  Patent Document 2 provides an image data transmission / reception system that displays an image of an optimum size according to the resolution of an information display screen of a mobile terminal, and according to the resolution of the information display screen of the mobile terminal to be received by the server side. A plurality of symbol image data is stored, and symbol image data to be transmitted to the mobile terminal is determined and transmitted based on the resolution related information received from the mobile terminal. Thus, it can be appropriately displayed on the mobile terminal.

Patent Document 3 relates to an image data receiving method, an adapter device, and the like, and aims to reduce the memory amount of the receiving device and reduce cost and power consumption. For this purpose, the received encoded data is decoded and the resolution is converted according to the image processing capability of the receiving apparatus, or clipping processing is performed and output to the image output unit.
In Patent Documents 2 and 3, as in Patent Document 1, all information is received on the premise of image display appropriate for a mobile terminal, and some information cannot be received promptly due to poor line conditions. , Can not achieve each purpose.

  Patent Document 4 relates to a server device and a web data conversion method, and aims to provide a web server device that allows a WWW page to be viewed on a portable information terminal device. The web server device is a request of each terminal device. The page data is acquired from a web server on the Internet according to the received data, and the acquired page data is converted to the terminal device based on the resource information of the transfer destination terminal device and transferred to the terminal device. Yes.

Patent Document 5 relates to a data conversion system and a data conversion method. Data conversion is performed so that page data acquired by a WAP proxy is adapted to a terminal device based on resource information of a transfer destination terminal device, and is converted to the terminal device. By transferring, the server device does not need to hold data conversion information for each terminal device in advance.
The above Patent Documents 4 and 5 are sent after data conversion so as to be compatible with the terminal device on the server device side, and no countermeasure is proposed when the reception state during transmission deteriorates.
Japanese Patent Application Laid-Open No. 2005-223731 JP 2005-128801 A JP 2002-185961 A Japanese Patent Laid-Open No. 11-250009 JP 2001-222487 A

Conventionally, since the data to be distributed is converted into a packet format as described above, image data included in particular is not considered. As a result, when a banner advertisement or the like is included, depending on the size of the image, the mobile terminal device becomes a considerable load.
As a result, depending on the communication state during the communication, the display of the screen is stopped or the packet waiting communication state cannot be left forever.
Specifically, when a homepage created in accordance with the display of a personal computer terminal (1024 × 768, etc.) is sent from a server device to a mobile terminal via a wireless communication line, the transmission speed is slower than when it is downloaded to a personal computer. For this reason, when it takes time to receive all the information and the reception environment is deteriorated, it becomes the same state as hang-up and does not move in the communication state waiting for the packet. In addition, since the screen of the mobile terminal is small, you will need to scroll to check all the displays, but the screen of the mobile terminal will be in a position to display the part that can not be received yet. In such a case, the reception display is not performed, and the usage state is very unpleasant for the user.

  The present invention has been made in view of the above situation, and the object of the present invention is to provide an image file on the terminal device side even when an image exceeding the processing capability is included in the transmitted file and reception is not possible or delay occurs. An alternative image display method, an alternative image display system, and a terminal used in the system, which can provide a browsing service by inserting and displaying a predetermined alternative image in the block, and can improve system hang-up due to data delay or inconsistency To provide an apparatus.

Claim 1 of the present invention in order to achieve the object, a dividing process of dividing an image file included in the transmission file by the server device to a plurality of packets, from the server apparatus by the substitute image preparation processing unit of the terminal device An alternative image preparation step of dividing the image file into blocks constituted by one or more of the packets by referring to head information of the packet of the image file to be sent, and preparing an alternative image of an alternative size for the block; When the packet is sent from the server device and cannot be received despite a retry reception operation of a predetermined number of times or more of the packet to be sent, the substitute image insertion processing unit of the terminal device forms a block that includes the packet. and alternate image insertion step of inserting the substitute image instead of a packet, the terminal device It is made of an alternative image display step of displaying the substitute image inserted with replacement image display processing unit, characterized in.
According to a second aspect of the present invention, when a packet is received by a retry reception operation less than a predetermined number of times in the first aspect of the present invention, if the number of received packets does not reach the alternative size, a repetitive packet reception operation is performed. When the number of received packets reaches an alternative size, a received image display step for displaying the received packet-corresponding block as a received image is included.
According to a third aspect of the present invention, in the invention according to the second aspect, it is determined whether or not the reception operation has been completed for all the blocks of the image file. When the reception operation for all the blocks is finished and the reception operation is finished for all the blocks, it is determined whether or not there is a block in which a substitute image is displayed in the image file block, and all the blocks are replaced. When the image is not displayed, the image file receiving operation is terminated. When there is a block displaying the substitute image , the number of received packets in the block regardless of the retry receiving operation. received image determination but performs a reception operation of a block corresponding to the substitute image is displayed as the not reached the alternate size packet Characterized in that it comprises a degree.
According to a fourth aspect of the present invention, there is provided a server device that publishes a web page, a network, and one or more terminal devices that access the server device via the network, download a web page file, and display the web page. In this file transfer system, the server device includes a division processing unit that divides an image file included in a transmission file into a plurality of packets, and a transmission unit that transmits the packets obtained by dividing the image file to the terminal device. And the terminal device divides the image file into blocks composed of one or more of the packets by referring to the head information of the packet of the image file, and stores a substitute image of a substitute size for the block. And the packet is sent, and the retra A substitute image insertion processing unit that inserts a substitute image of the memory unit in place of a packet in a block that includes the packet when reception is not possible despite the reception operation, and a substitute image that displays the inserted substitute image A display processing unit, and when an image file from the server device is not received in units of blocks, a substitute image is inserted into the block and displayed.
According to a fifth aspect of the present invention, when a packet is received by a retry reception operation less than a predetermined number of times according to the fourth aspect of the present invention, if the number of received packets does not reach the alternative size, a repetitive packet reception operation is performed. When the number of received packets reaches an alternative size, a received image display processing unit for displaying a received block corresponding to a packet as a received image is provided.
According to a sixth aspect of the present invention, in the invention according to the fifth aspect, it is determined whether or not the reception operation has been completed for all the blocks of the image file. When the reception operation for all the blocks is finished and the reception operation is finished for all the blocks, it is determined whether or not there is a block in which a substitute image is displayed in the image file block, and all the blocks are replaced. When the image is not displayed, the image file receiving operation is terminated. When there is a block displaying the substitute image , the number of received packets in the block regardless of the retry receiving operation. Received image determination for receiving the packet corresponding to the block in which the substitute image is displayed as if the substitute size has not reached the substitute size It comprises a part.
Claim 7 of the present invention divides an image file into blocks composed of one or more packets based on the head information of the packet of the image file sent from the server device , and stores a substitute image with each block as a substitute size And when the packet is sent and cannot be received despite a retry reception operation of a predetermined number of times or more of the packet to be sent, a substitute image of the memory unit is substituted for the packet in a block that includes the packet. An alternative image insertion processing unit to be inserted and an alternative image display processing unit to display the inserted alternative image are characterized.
According to an eighth aspect of the present invention, when the size of the block is larger than the size of the substitute image to be inserted in the invention according to the seventh aspect, predetermined data is inserted into the dot portion of the block into which the substitute image is not inserted. If the size of the block is smaller than the size of the substitute image to be inserted, a dot complement / deletion adjustment unit that deletes some dots of the substitute image and inserts them in accordance with the size of the block is provided. It is characterized by having.
According to a ninth aspect of the present invention, in the invention according to the seventh or eighth aspect, the terminal device is a mobile terminal device having a wired or wireless communication function for communicating with the network.

According to the above configuration, it is possible to eliminate the inconvenience that the communication is kept waiting forever and the screen is not updated. Even when an image exceeding the processing capability is included, the service can be provided by the substitute image. System hangup due to data delay or inconsistency can be improved.
Furthermore, when the image to be sent is, for example, age-restricted content or the like, it is possible to avoid downloading a specific image by replacing the image and displaying it.
If all the images are replaced with alternative images, further communication time and cost reduction can be realized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing an outline of a WEB system using an image alternative display method according to the present invention.
The mobile terminal devices 2a to 2n are, for example, 5 type screens, and resolutions of 1024 × 768, 800 × 600, 640 × 480, and 320 × 240 can be set. Each of the mobile terminal devices 2a to 2n can access and browse the home page of the server device 1 via the network 3 wirelessly. The server device 1 divides the HTML file of the home page into a large number of packets with the same size, and downloads the divided packets to the accessed mobile terminal device. For example, if the mobile terminal device downloads a homepage having a size of 320 × 240 and a size of 640 × 480, the mobile device displays a quarter of the homepage and displays the remaining area that is not displayed on the screen. It is possible to browse all areas by performing a scrolling operation.

FIG. 2 is a circuit block diagram showing an embodiment of a server device used in the system according to the present invention.
Connected to the server apparatus 1 is a database 20 for storing a large number of web page data. When the web page transmission / reception control unit 21 receives a web page browsing request from the mobile terminal device through the communication device 23, the web page transmission / reception control unit 21 passes the HTML format file of the web page requested to be browsed to the page packet generation unit 22. The page packet generator 22 divides the delivered HTML format file into a predetermined data size and packetizes each file. One packet has a 128-byte size, and is composed of header information including a start code, a destination address, a source address, and other information, a data portion, a trailer including error detection information and an end code. The header information includes information for identifying the text portion, image portion, and script information of the web page, and the image portion header information includes the image size, the number of packets, and its packet serial number.

  The packet generated in this way is sent by the web transmission / reception control unit 21 to the mobile terminal device that has requested browsing through the communication device 23 and the network. Packets are sent in order according to their serial numbers.

FIG. 3 is a circuit block diagram showing an embodiment of a mobile terminal device used in the system according to the present invention.
This circuit block has a personal computer function in which a predetermined OS is installed and browsing software is installed, and only the part directly related to the present invention is described.
The memory unit 12, CPU 13, communication device 14, operation unit 15, input / output interface 16, liquid crystal drive unit 17, and liquid crystal display unit 18 are included.
The memory unit 12 stores a personal computer function OS, web page browsing software, a substitute image (for example, image data such as 16 × 16 dots) and data for replacement insertion. The operation unit 15 is an input unit in which a large number of keys are arranged, and each key operation signal is sent to the CPU 13 via the input / output interface 16. The input / output interface 16 is connected to a plurality of input / output terminals 19 for outputting audio and image information and inputting / outputting data.

The liquid crystal drive unit 17 is driven in response to image processing information from the CPU 13 and displays an image on the liquid crystal display unit 18.
The CPU 13 reads the personal computer function OS, performs an operation button and data input / output processing, computation and image processing, communication processing, image display processing, and the like, as well as a function realized by starting browsing software. It has the functions of an image preparation processing unit 13b, a substitute image insertion processing unit 13c, a substitute image display processing unit 13d, a received image display control unit 13e, and a determination unit 13f.
When the system control unit 13a detects from the packet head information that the image file is present in the transmission file, the substitute image preparation processing unit 13b reads the substitute image from the memory unit 12, reads it into the cache in the CPU, and reads the image packet. The data reception operation is prepared so that it can be inserted into a part of the received image at any time.

The substitute image insertion processing unit 13c inserts the substitute image in the cache into the block of the image file including the packet that could not be received in the web page (for example, if the packet is not received even after retrying five times, it is determined that the packet cannot be received). The process which performs is performed.
The substitute image display processing unit 13d controls the display of the substitute image inserted in the block constituted by the unreceivable packet of the currently received image file.

The received image display control unit 13e determines whether, for example, two packets constituting the block of the image file have been received, that is, whether the alternative size of the block portion has been reached. When the packet reception operation is performed and the alternative size is reached, the received image of the block portion is displayed. Then, it is determined whether or not the reception operation has been performed for all the blocks in the image file. If the reception operation has not been completed for all the blocks, the process proceeds to the packet reception operation. If the reception operation has been completed for all the blocks, Control is passed to the determination unit 13f that determines whether a substitute image is displayed in the image file.
The determination unit 13f determines whether or not a substitute image is included in the image file displayed as described above. If not included, the determination unit 13f ends the image file reception operation at that time, and includes If it has been received, the process proceeds to a receiving operation for a packet not received by the block.

FIG. 4 is a diagram for explaining an example of downloading an image file on a transmission file page and displaying an image on the terminal side.
The image file in FIG. 4A in the transmission file page on the server side is divided into, for example, 24 packets (FIG. 4B), and the packets are sequentially arranged on the mobile terminal side as shown in FIG. 4C. Forward to.
The receiving side normally assembles the sent packets (FIG. 4D) in order of numbers (FIG. 4E), and displays the original image on the display unit (FIG. 4F).

FIG. 5 is a diagram for explaining an example of an image file block allocation method according to the present invention.
The image file is divided into packets, and the mobile terminal device prepares a 16 × 16 dot substitute image so that, for example, one packet is composed of two packets. In this example, the image file is composed of 12 blocks. For the first block, the fourth block, the seventh block, and the tenth block, one of the packets (the portion represented by the hatched line in (a)) is received. Since it was not possible, the substitute image (the part indicated by the diagonal lines in (c)) is inserted and displayed in the first block, the fourth block, the seventh block, and the tenth block of the assembled image.
Even if there is a packet that could not be received in this way, the requested home page is displayed on the mobile terminal device. After this display, the receiving operation of the packet that could not be received is continued. When the packet is received, the block in which the substitute image is inserted is replaced with the received image portion.

FIG. 6 is a flowchart for explaining the flow of the image alternative display method according to the present invention.
When the user starts browsing software and clicks the URL displayed on the liquid crystal display unit 18 to browse a desired home page by the operation unit 15 in the mobile terminal device, this information is transmitted to the system control unit 13a via the input / output interface 16. (Step (hereinafter referred to as “S”) 601).
When the system control unit 13a sends a browsing request to the server device, the web page transmission / reception control unit 21 reads the data of the corresponding home page from the database 20, generates a packet by the page packet generation unit 22, and transmits the packet through the communication device 23. Start transmission to the terminal device. On the mobile terminal device side, the system controller 13a receives the home page sent and starts reading (S602). Then, it is determined from the head information whether or not the packet to be sent is a text part packet (S603). If it is a text part, it is read into the memory unit 12 (S604). If the reading of the text packet is not completed, the read packet is displayed on the liquid crystal display unit 18 (S605, S606), and the process returns to S602 to return to the next text. Read the packet.

If it is determined in S603 that it is not a text portion, it is next determined whether or not the image data (S607). If it is image data, the process proceeds to the flow of FIG. 7 which is the image display method of the present invention. If it is not image data, it is next determined whether or not it is a moving image flash (S608). If it is not the moving image flash, it is determined whether or not the homepage reception is completed by skipping or error processing (S609, S605). If not, the display is performed (S606), and then the process returns to S602 to receive the next packet.
If it is a moving picture flash, a moving picture reading process is performed (S610), the moving picture flash is displayed (S611), and then the process returns to S602 to receive the next packet.
If it is determined in S605 that all homepage packets have been received, the entire homepage is displayed (S612).

  FIG. 7 is a flowchart for explaining the flow focusing on image file download. When the system control unit 13a determines that the image data is image data in S607 of FIG. 6, the control is transferred to the substitute image preparation processing unit 13b. The substitute image preparation processing unit 13b confirms the size of the image file from the head information of the packet, reads the substitute image corresponding to the image data from the memory unit 12, and loads it into the cache in the CPU. A plurality of alternative images (16 × 16 dots, 32 × 32 dots, 64 × 64 dots, etc.) are prepared, and alternative images to be read are determined in accordance with the size of the image file. The system control unit 13a performs an image packet receiving operation (S703), and repeats the retry when the image packet cannot be received due to the influence of the line or the like. If the packet cannot be received even after a predetermined number of retries (for example, 5 times), it is determined that the packet has not been received.

When it is determined that the substitute image insertion processing unit 13c has not been received, the substitute image insertion processing unit 13c inserts the substitute image in the cache into the block of the image file including the packet (S704, S705). Thereby, the substitute image display processing unit 13d displays the block of the image file on the liquid crystal display unit 18 (S706), and returns to the operation of receiving the packet constituting the next block (S703). On the other hand, when the packet is received in S704, the control is transferred to the received image display control unit 13e. The received image display control unit 13e receives a packet constituting a block (for example, composed of two packets) of an image file, and has received a plurality of packets constituting the block, that is, reaches an alternative size of the block portion. It is determined whether or not the alternative size has been reached (S707), and the process proceeds to S703. If the system control unit 13a does not receive the remaining packets even after retrying the predetermined number of times in the remaining packet receiving operation (S704), it is determined that it has not been received, and the alternative image insertion processing unit 13c selects the alternative image. The block in which the substitute image is inserted is displayed (S705, S706), and the packet of the next block is received (S703).

When the remaining packet is received, the received image display control unit 13e determines whether or not the block of the image file has an alternative size (S707). If the alternative size has not been reached, the process proceeds to S703 as described above. Transition to image packet reception. If the alternative size has been reached, the received image of the block portion is displayed (S708). Then, it is determined whether or not the reception operation has been completed for all the blocks in the image file (S709). If the reception operation has not been completed for all the blocks, the process proceeds to the packet reception operation of S703 and is not received. Performs block packet reception. When the reception operation has been completed for all blocks, control is passed to the determination unit 13f.
The determination unit 13f determines whether or not a substitute image is included in the displayed image file (S710). If not included, the determination unit 13f ends the image file reception operation at that time (S711). If it is included, the process proceeds to S703 to receive a packet that has not been received in the block.

  By operating in this way, even when a part of the packet of the image file cannot be received, it is possible to browse the home page including the image file without delay by inserting the substitute image. Since the substitute image inserts the received image by sequentially receiving the packets, the home page that originally contained the substitute image is replaced with the image file to be received.

FIG. 8A is a diagram illustrating a specific example of a downloaded home page, and FIG. 8B is a diagram illustrating a specific example of a downloaded home page.
When browsing the home page as shown in FIG. 8A, when the image file shown in 30 is included, when the reception environment is not sufficient, the substitute image 31 prepared on the mobile terminal device side is inserted into the block that could not be received. Displayed. The home page is displayed without delay on the display unit of the mobile terminal device, but the image file 32 in which the substitute image 31 is inserted is displayed. Therefore, in the mobile terminal device, the user can quickly operate the browsing software. As time passes, the substitute image is gradually replaced with the original image.

  In addition to each size prepared in advance, the substitute image can be created by itself and the self-made substitute image can be inserted into the image on the homepage. Add an image generation function unit, activate this function and read and assign the part constituting the substitute image in the operation part from the sample or write it using a touch pen etc. to complete the self-made substitute image, memory A self-made substitute image can be used by adding to the substitute image storage area. Self-made substitute images can be created in various sizes, and can be inserted into blocks of image files that could not be received by causing the system control unit to select substitute images of each size in association with the size of the image file to be received.

  In addition, when a self-made substitute image or a substitute image prepared in advance is associated, the block size may be different from the size of the substitute image. In such a case, when the size of the block is larger than the size of the substitute image to be inserted, predetermined data is inserted and embedded in the dot portion of the block in which the substitute image is not inserted. In addition, when the block size is smaller than the size of the substitute image to be inserted, a dot complement / deletion adjustment unit is provided that deletes some dots of the substitute image and inserts them in accordance with the block size.

  In the above embodiment, an example in which a home page is downloaded and displayed on a mobile terminal device over a wireless network that is easily affected by the communication environment from the server device has been described, but the case where communication is performed by wire and received by a personal computer terminal or the like. Can be applied similarly.

  An image alternative display method, an image alternative display system, and a terminal device used in the system, in which a homepage is downloaded from a web on the Internet and viewed on a mobile terminal device or the like.

It is a figure which shows the outline of the WEB system using the image alternative display method by this invention. It is a circuit block diagram which shows embodiment of the server apparatus used for the system by this invention. It is a circuit block diagram which shows embodiment of the terminal device used for the system by this invention. It is a figure for demonstrating the example which downloads the image file of a transmission file page, and displays an image on the terminal side. It is a figure for demonstrating an example of the allocation method of the block of an image file. It is a flowchart for demonstrating the flow of the image alternative display method by this invention. It is a flowchart for demonstrating the flow which paid its attention to image file download. It is a figure which shows the specific example of the homepage to download. It is a figure which shows the specific example of the downloaded homepage.

Explanation of symbols

1 Server device
2a ... 2n Terminal equipment 3 Network
12 memory unit 13 CPU
DESCRIPTION OF SYMBOLS 14, 23 Communication apparatus 15 Operation part 16 Input / output interface 17 Liquid crystal drive part 18 Liquid crystal display part 20 Database 21 Web page transmission / reception control part 22 Page packet generation part 24 Bus

Claims (9)

A division processing step of dividing the image file included in the transmission file by the server device into a plurality of packets;
The substitute image preparation processing unit of the terminal device divides the image file into blocks composed of one or more of the packets by referring to the head information of the packet of the image file sent from the server device, and substitutes for the block A substitute image preparation process for preparing a substitute image of a size;
When the packet is sent from the server device and cannot be received despite a retry reception operation of a predetermined number of times or more of the packet to be sent, the substitute image insertion processing unit of the terminal device forms a block that includes the packet. An alternative image insertion step of inserting the alternative image instead of a packet;
An alternative image display step of displaying an alternative image inserted by the alternative image display processing unit of the terminal device ;
An image alternative display method characterized by comprising: When a packet is received with a retry reception operation less than the predetermined number of times, if the number of received packets has not reached the alternative size, the packet reception operation is repeated.
2. The image alternative display method according to claim 1, further comprising a received image display step of displaying a received packet corresponding block as a received image when the number of received packets reaches an alternative size. It is determined whether or not the reception operation has been completed for all the blocks of the image file, and when the reception operation has not been completed for all the blocks, the process proceeds to a reception operation for a packet that has not been received,
When the reception operation is finished for all the blocks, it is determined whether there is a block in which a substitute image is displayed among the blocks of the image file.
When the substitute image is not displayed in all blocks, the image file reception operation is terminated,
When there is a block in which the substitute image is displayed, the block corresponding to the block in which the substitute image is displayed as the number of received packets in the block does not reach the substitute size in spite of the retry reception operation . 3. The image alternative display method according to claim 2, further comprising a received image determination step for performing a packet receiving operation. A file transfer system comprising a server device that publishes a web page, a network, and one or more terminal devices that access the server device via the network, download a file of the web page, and display the web page.
The server device includes a division processing unit that divides an image file included in a transmission file into a plurality of packets;
Transmission means for transmitting a packet obtained by dividing the image file to the terminal device,
The terminal device
A memory unit that divides the image file into blocks constituted by one or more of the packets by referring to head information of the packet of the image file, and stores an alternative image of an alternative size for the block;
When the packet is sent and cannot be received in spite of a retry reception operation of a predetermined number of times or more of the packet to be sent, an alternative is to insert an alternative image of the memory unit in place of the packet in a block that includes the packet An image insertion processing unit;
A substitute image display processing unit for displaying the inserted substitute image;
When the image file from the server device is not received in units of blocks, a substitute image is displayed by inserting a substitute image into the block. When a packet is received with a retry reception operation less than the predetermined number of times, if the number of received packets has not reached the alternative size, the packet reception operation is repeated.
5. The image alternative display system according to claim 4, further comprising: a received image display processing unit that displays a received image corresponding to a block corresponding to the received packet when the number of received packets reaches an alternative size. It is determined whether or not the reception operation has been completed for all the blocks of the image file, and when the reception operation has not been completed for all the blocks, the process proceeds to a reception operation for a packet that has not been received,
When the reception operation has been completed for all blocks, it is determined whether there is a block with a substitute image displayed in the image file block. If no substitute image is displayed for all blocks, the image is displayed. End the file receiving operation,
When there is a block in which the substitute image is displayed, the block corresponding to the block in which the substitute image is displayed as the number of received packets in the block does not reach the substitute size in spite of the retry reception operation . The image alternative display system according to claim 5, further comprising a received image determination unit that performs a packet receiving operation. A memory unit that divides an image file into blocks composed of one or more packets according to the head information of the packet of the image file sent from the server device, and stores a substitute image with each block as a substitute size;
When the packet is sent and cannot be received in spite of a retry reception operation of a predetermined number of times or more of the packet to be sent, an alternative is to insert an alternative image of the memory unit in place of the packet in a block that includes the packet An image insertion processing unit;
A substitute image display processing unit for displaying the inserted substitute image;
The terminal device characterized by having. When the size of the block is larger than the size of the substitute image to be inserted, predetermined data is inserted and filled in the dot portion of the block where the substitute image is not inserted,
When the size of the block is smaller than the size of the substitute image to be inserted, a dot complement / deletion adjustment unit is provided that deletes a part of the dots of the substitute image and inserts it in accordance with the size of the block. The terminal device according to claim 7.   9. The terminal apparatus according to claim 7, wherein the terminal apparatus is a mobile terminal apparatus having a wired or wireless communication function for communicating with the network.

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