JP5667841B2 - Data download device and data download method - Google Patents

Description

  The present invention relates to a data download apparatus and a data download method for prefetching linked data.

  A web cache function for storing a rendering result of a web page accessed by a user in the past in a storage area is conventionally known. Further, a look-ahead function has been conventionally known in which rendering is performed in advance for a page that the user may access in the future (for example, a linked web page), and the rendering result is stored in advance in a storage area. Yes. When the user accesses a cached or prefetched web page, the rendering time that is generated and stored in advance is taken out of the storage area and displayed immediately, so that the experience time required to display the web page Is reduced, and convenience for the user is improved. Patent Document 1 is disclosed as a portable terminal device having a web cache function. Further, Patent Document 2 is disclosed as a system that pre-reads a link destination screen and displays it simply when browsing a web page.

  The mobile terminal of Patent Document 1 stores screen size information indicating the resolution size of one screen of the mobile terminal screen in the screen size information storage unit, and the web received from the web server by the cache determination unit. By obtaining the amount of data corresponding to the screen size information from the top of the layout information in the data and saving this data in the cache storage unit, the website experience speed can be increased and the cache can be cached. The amount of storage can be reduced.

  The link destination screen display system disclosed in Patent Document 2 includes a URL extraction unit that inspects the inside of a web page and extracts the URL of another web page, a link destination determination unit that determines a link destination from the extracted URL, and a determination here. Page information acquisition means for acquiring the linked page content, and means for creating a simple display screen from the acquired page content, at least extracting only the text document to be displayed from the linked page content, A reduction processing means for creating a simple display screen by unifying the character font and character size of the text document, removing blank lines in the sentence and filling the lines, so that the mouse pointer is over the link display. When it stops, it is possible to pop up a simple display screen and immediately even if the user does not access the link destination It made it possible to inform an overview of the linked web page to over The.

JP 2008-21433 A JP 2004-046478 A

  In the portable terminal of Patent Document 1, an amount of data corresponding to the screen size information can be stored in the cache storage unit for a web page accessed in the past, but the web page has not been accessed yet. As a result, it was not possible to prefetch web pages that are likely to be accessed in the future. If pre-reading is to be realized with the function of the portable terminal of Patent Document 1, multimedia data (generally referred to as image, sound, video, etc., hereinafter referred to as MMD, MM, etc.) included in the Web page for the Web page to be pre-read. (Also referred to as data), and by rendering these multimedia data using layout information, rendering is performed, the amount of data corresponding to the screen size information is obtained from the top of this rendering result, and this data is cached Processing to save to the part is required. The problem is that this process causes an increase in traffic, a decrease in the processing speed of the portable terminal, and an increase in the experience time required for displaying a web page.

  On the other hand, in the link destination screen display system of Patent Document 2, since only a text document is extracted to create a simple display screen regardless of one screen, the above problem does not occur. However, since the simple display screen only with text cannot view multimedia data such as images, sounds, and moving pictures accompanying the text, there is a problem that information that the user wants is not always prefetched. Therefore, the present invention provides a data download apparatus that can easily determine the range of a web page that is generally one screen and pre-read multimedia data existing in this range together with text.

  The data download device of the present invention includes a link destination URL extraction unit, a source acquisition unit, a temporary rendering unit, an MMD position information acquisition unit, an MMD position determination unit, an MMD acquisition unit, and a re-rendering unit. The link destination URL extraction unit extracts the link destination URL and outputs the link destination URL. The source acquisition unit acquires a source of a web page (hereinafter referred to as a link destination web page) existing in the output link destination URL, and outputs the source. The temporary rendering unit acquires the output source, provisionally renders all the frames of multimedia data designated by the source and the text of the linked web page, and outputs the temporary rendering result. The MMD position information acquisition unit acquires the position information of the multimedia data of the link destination web page from the output temporary rendering result, and outputs the position information. The MMD position determination unit outputs a comparison result obtained by comparing the size of the output position information with a predetermined threshold value for each multimedia data. The MMD acquisition unit refers to the output comparison result and downloads multimedia data corresponding to the position information only when the position information is smaller than the threshold value. The re-rendering unit re-renders the downloaded multimedia data and the text of the linked web page, and outputs the re-rendering result.

  According to the data download device of the present invention, it is possible to easily determine the range of a web page that is generally one screen without increasing traffic, and pre-read multimedia data existing in this range together with text. Is possible.

1 is a block diagram illustrating a configuration example of a data download device according to a first embodiment. 6 is a flowchart illustrating an operation example of the data download apparatus according to the first embodiment. FIG. 3 is a diagram illustrating a source acquired by the data download apparatus according to the first embodiment. The figure which illustrates about the relationship of the 1st screen size which the link destination web page and the web browser of a portable terminal display. The figure which illustrates about the temporary rendering result of a link destination web page. The figure which illustrates about the re-rendering result of a link destination web page.

  Hereinafter, embodiments of the present invention will be described in detail. In addition, the same number is attached | subjected to the structure part which has the same function, and duplication description is abbreviate | omitted.

  The data download apparatus according to the first embodiment will be described in detail with reference to FIGS. 1, 2, and 3. FIG. 1 is a block diagram illustrating a configuration example of a data download apparatus 100 according to the present embodiment. FIG. 2 is a flowchart illustrating an operation example of the data download apparatus 100 according to the present embodiment. FIG. 3 is a diagram illustrating the source 200 acquired by the data download device 100 according to the present embodiment. The data download device 100 of the present invention includes a link destination URL extraction unit 101, a source acquisition unit 102, a temporary rendering unit 103, an MMD position information acquisition unit 104, a threshold storage unit 105, and an MMD position determination unit 106. An MMD acquisition unit 107, an MMD storage unit 109, a re-rendering unit 110, a rendering result storage unit 111, a remaining MMD acquisition unit 113, a remaining rendering unit 114, and a screen display unit 115.

  Hereinafter, the operation of each component (101 to 115) of the data download device 100 of this embodiment will be described in detail. In the description, it is assumed that the user of the mobile terminal incorporating the data download device 100 of the present embodiment is browsing the web page of a weather forecast site using the mobile terminal. The data download device 100 is assumed to be wirelessly connected to the web servers 91-1, 91-2, ..., 91-N (N is an arbitrary natural number equal to or greater than 1) so as to be communicable. The source of the web page of the weather forecast site that the user is browsing is illustrated in FIG. First, the link destination URL extraction unit 101 extracts the link destination URL existing in the web page that the user is browsing, and outputs the link destination URL to the source acquisition unit 102 (S101).

  The operation of the link destination URL extraction unit 101 will be described below with a specific example. The link destination URL extraction unit 101 refers to the source of the web page being browsed, and searches for sentences described in the grammatical rules starting with “<a href” and ending with “</a>”. This sentence is called a link display tag or a link tag, and is for displaying a link. Here, a link is an area that can be clicked by placing the cursor on it, and this area is displayed with characters, figures, icons, etc. that are different in color from the text. By moving the cursor to this area and clicking, it is possible to access a page different from the currently displayed web page. The link display tag includes information such as a link destination URL. The link destination URL is information for specifying a location where the source of the link destination web page is stored. A more specific description will be given by taking the link display tag 230 shown in FIG. 3 as an example. The link display tag 230 illustrated in FIG. 3 includes a link destination URL 231 “hokaido.htm”. “Hokaido.html” is the name of the html source file. In the link destination URL 231, only the name of the source file is specified, and the location information of the source file is not specified. However, in this specification, the link is a so-called intra-site link, and the source of the link is the web page currently being browsed. It means that it is saved in the same place as the source. For example, when an external web page that is not within the site of the web page being browsed by the link display tag is designated as a link destination, for example, “http://www.example.co.jp” is used as the link destination URL. Thus, it is necessary to specify a URL prefixed with http (hyper text transfer protocol). Therefore, in this case, the link display tag is “<a href =” http: // www. example. co. jp "> example </a>". In this way, the link destination URL extraction unit 101 refers to the source of the web page currently being browsed by the user, and starts with “<a href” and ends with “</a>”. By searching, it is possible to extract the link destination URL of the web page being browsed. The link destination URL extraction unit 101 outputs the link destination URL extracted in this way to the source acquisition unit 102.

  Next, the source acquisition unit 102 acquires the output link destination URL, accesses the link destination URL, acquires the source existing in the link destination URL, and outputs the source to the temporary rendering unit 103. (S102). The temporary rendering unit 103 acquires the output source, provisionally renders all the frames of multimedia data designated by the source and the text of the linked web page, and outputs the temporary rendering result ( S103). The operation of the temporary rendering unit 103 will be described below with a specific example.

  The temporary rendering unit 103 refers to the source of the linked web page and searches for a sentence described in the grammar rule that starts with “<img src” and ends with “>”. This sentence is called an image display tag or an image tag, and includes information such as a storage location of multimedia data (hereinafter referred to as an MMD storage location) and a display size of multimedia data (hereinafter referred to as an MMD display size). The MMD display size represents the size of multimedia data when displayed on a web page, and is different from the pixel size possessed by, for example, image data or moving image data. This will be described more specifically with the image display tag 210 shown in FIG. 3 as an example. As described above, FIG. 3 is a diagram illustrating the source of the web page being browsed. Strictly, it is not a diagram illustrating the source of the linked web page. There is no essential difference, and the grammar rules used to describe these sources are the same. Therefore, it demonstrates concretely using FIG. 3 here for convenience of explanation. The image display tag 210 illustrated in FIG. 3 includes an MMD storage location 211 “img / tenki / logo.gif”. “Img / tenki / logo.gif” is tenki existing in the img folder on the web server that manages the data of the web page as multimedia data arranged on the web page by the image display tag 210. File name in the folder logo. It means that gif is specified. The screen display tag 210 includes an MMD display size 212 “width =“ 200 ”height =“ 40 ””. This is the above-mentioned multimedia data log. It is specified that gif is displayed with a size of 200 dots wide and 40 dots high. Here, the temporary rendering unit 103 generates only a frame (frame) corresponding to the multimedia data without downloading the multimedia file designated by the source, and performs temporary rendering using only this frame. Features. Here, the temporary rendering unit 103 sets all the multimedia data sizes specified by the source to zero, and sets all the multimedia data frames (since it is a square frame of zero size, it actually becomes a point. ) And text may be provisionally rendered, or provisional rendering may be executed by other methods. The other method is, for example, that multimedia data that does not have the width and height attributes (MMD display size) among the multimedia data specified by the source is set to zero, and the width and height attributes (MMD display size) are set to zero. For example, the multimedia data size is set to the dot size indicated by the width and height attributes, and each frame is generated to temporarily render all multimedia data frames and text. By performing provisional rendering using frames in this way, provisional rendering can be performed without downloading multimedia data existing in the link destination URL, and provisional rendering can be performed quickly and easily. Become. Further, in the data download apparatus 100 according to the present embodiment, the temporary rendering unit 103 performs temporary rendering with the size of multimedia data having no width and height attributes set to zero. Therefore, the width and height attributes are set on the source. Even when there is multimedia data that does not exist, temporary rendering can be performed easily and at high speed.

  The temporary rendering unit 103 searches for a sentence or the like described in a grammar rule starting with “<font size =” described in the source and ending with “</ font>”. This sentence is called a font display tag or a font tag, and includes text font display size information. In FIG. 3, the font display tag 220 and the font size 221 are exemplified. The temporary rendering unit 103 acquires information necessary for the layout of the web page by acquiring a line-height in addition to the font size. When information necessary for the layout of these web pages is described collectively in a style sheet or the like, the temporary rendering unit 103 acquires the style sheet. In this way, the temporary rendering unit 103 acquires all layout information necessary for temporary rendering, executes temporary rendering, and outputs the obtained temporary rendering result to the MMD position information acquisition unit 104.

  The MMD position information acquisition unit 104 acquires the position information of the multimedia data of the linked web page from the output temporary rendering result, and outputs the position information (S104). This position information can be coordinate information whose basic unit is, for example, the vertical and horizontal dot sizes of the mobile terminal screen. For example, the upper left corner point of the web page display screen displayed by the web browser provided in the mobile terminal is the origin of coordinates, the x-axis positive direction is from the left side to the right side of the mobile terminal screen, and the y-axis positive direction is the mobile terminal Direction from the upper side of the screen to the lower side. Also, since most multimedia data is rectangular, the coordinates of the upper left corner of the multimedia data may be used as position information. In this way, the MMD position information acquisition unit 104 acquires the position information of the multimedia data from the temporary rendering result, and outputs the position information to the MMD position determination unit 106.

  The MMD position determination unit 106 outputs, for each multimedia data, a comparison result obtained by comparing the size of the output position information with a predetermined threshold value (S106). Here, the threshold value is determined in advance based on the number of dots in the vertical direction and the horizontal direction of the mobile terminal screen in the same manner as the position information. Specifically, the threshold value indicates the number of dots in the vertical and horizontal directions corresponding to one web page display screen displayed by the web browser provided in the mobile terminal. The number of dots in the vertical and horizontal directions corresponding to one screen of the web page display screen of the mobile terminal is predetermined according to the specifications of the mobile terminal. Therefore, it is assumed that this threshold value is already stored in the threshold value storage unit 105 in the portable terminal at the time of factory shipment. For example, when it is determined that a screen area of horizontal 240 dots x vertical 350 dots is used for display of a web browser in a certain mobile terminal, threshold values are defined in the x-axis positive direction and the y-axis positive direction exemplified above. If so, the threshold is (240, 350). For example, when the position information of some multimedia data is (300, 150), the relationship of position information> threshold value is established in the comparison result in the x-axis direction. On the other hand, the relationship of positional information <threshold value holds in the comparison result in the y-axis direction. Therefore, this multimedia data is displayed outside the first screen displayed by the web browser of the portable terminal. Specifically, this multimedia data is displayed in an area on the right side of the first screen displayed by the web browser of the mobile terminal. For example, when the position information of certain multimedia data is (120, 130), the relationship of position information <threshold value holds in both the x-axis direction and the y-axis direction. This multimedia data is displayed in the first screen displayed by the web browser of the portable terminal. In this way, the MMD position determination unit 106 outputs a comparison result comparing the position information and the threshold value to the MMD acquisition unit 107 for each multimedia data.

  Next, referring to the output comparison result, the MMD acquisition unit 107 downloads multimedia data corresponding to the position information from the web server only when the position information is smaller than the threshold value, and downloads the multimedia data. The multimedia data thus output is output to the MMD storage unit 109 (S107). If there is multimedia data not yet determined by the MMD position determination unit 106 in the linked web page, S106 and S107 are repeated for this multimedia data (S108). When the MMD position determination unit 106 finishes determining all the multimedia data in the linked web page, the process proceeds to S110. In this way, it is possible to download only multimedia data that may be displayed in the first screen displayed by the web browser of the mobile terminal. The MMD storage unit 109 acquires the output multimedia data, and stores the acquired multimedia data in itself. The re-rendering unit 110 re-renders the multimedia data downloaded and stored in the MMD storage unit 109 and the text of the linked web page, and outputs the re-rendering result to the rendering result storage unit 111 (S110). The rendering result storage unit 111 acquires the output re-rendering result, and stores the acquired re-rendering result in itself (S111). When S101 to S111 are not completed for any of the link destination URLs present in the web page being browsed by the user, the above S101 to S111 are repeated for the web page existing at the corresponding link destination URL. (S112). In this way, re-rendering is performed for all link destination URLs existing in the web page being browsed by the user, and the re-rendering result is stored in the rendering result storage unit 111.

  Next, a case where the user clicks a link and moves from the web page being browsed to one of the linked web pages will be described. When the user clicks the link and accesses the link destination URL, the rendering result storage unit 111 outputs the corresponding re-rendering result to the screen display unit 115. The screen display unit 115 acquires the output re-rendering result, and displays the re-rendering result on the mobile terminal screen. In this way, simultaneously with the user's access, by displaying the re-rendered result obtained by rendering the multimedia data displayed on the one screen created in advance and all the text, the user required to display the web page The experience time of can be reduced. In addition, when the user accesses the link destination web page, the remaining MMD acquisition unit 113 simultaneously with the access of the user, among the multimedia data designated by the source of the link destination web page being accessed by the user, Download of multimedia data that MMD acquisition unit 107 did not download (multimedia data determined by MMD position determination unit 106 to be displayed outside the area of the first screen displayed by the web browser of the mobile terminal) is started. To do. In this way, the remaining MMD acquisition unit 113 downloads the remaining multimedia data and outputs it to the remaining rendering unit 114. The remaining rendering unit 114 acquires the remaining output multimedia data, arranges the multimedia data, performs rendering again, and outputs the rendering result to the screen display unit 115. The screen display unit 115 acquires the output rendering result, and displays the acquired rendering result on the mobile terminal screen. By starting the download of the remaining multimedia data simultaneously with the user's access in this way, when the user scrolls the display area of the web page downward, the download and rendering of the remaining multimedia data is at a certain level. Since it is complete | finished, the user's experience time required for the display of a web page can be reduced.

  Next, the temporary rendering result and the re-rendering result generated by the data download device 100 according to the present embodiment will be described in detail with specific examples with reference to FIGS. FIG. 4 is a diagram illustrating the relationship between the link destination web page 93 and the initial one screen size displayed by the web browser of the portable terminal (hereinafter simply referred to as one screen size). FIG. 5 is a diagram illustrating the temporary rendering result 93 ′ of the linked web page 93. FIG. 6 is a diagram illustrating the re-rendering result 93 ″ of the linked web page 93. The linked web page 93 illustrated in FIG. 4 includes multimedia data 93-1, 93-2, 93-3, 93-. 4, 93-5, 93-8, 93-9, and texts 93-6 and 93-7, a rectangular area with the thick broken line as the lower end and right end, and the thick solid line as the upper end and left end Represents the size of one screen, and the length designated by the thick broken line represents the size of one screen (vertical) 311 and the size of one screen (horizontal) 312. The thick solid lines represent the top and left edges of the linked web page 93. The black circle at the upper left corner of each multimedia data is the MM data positions 93-1-1, 93-2-1, 93-3-1, 93-4-1, 93-5-1, 93-8. -1, 93-9-1. The coordinates of the MM data position can be used as the above-described position information, and the linked web page 93 is a web page for general customers of ABC Corporation in this example, and the multimedia data 93-1 is of ABC Corporation. Image data of a logo mark Multimedia data 93-2 is image data used for a link that can access the first page in a web page of ABC Corporation, and multimedia data 93-3 is ABC Corporation. The multimedia data 93-4 is an image used for a link accessible to the product introduction page of ABC Corporation web page. The multimedia data 93-5 is the latest data on ABC Corporation. The video data describing the event information is the text 93-6, which is the text explaining the latest event information described in the multimedia data 93-5, the content of the text is omitted, but the text is shown in FIG. It is assumed that it is written horizontally inside the broken line, and the same applies to the text 93-7.The multimedia data 93-8, 93-9 is used for the link that can access the details page of the product currently being campaigned. Image data.

  A case where the temporary rendering unit 103 of the data download apparatus 100 executes temporary rendering for the above-described link destination web page 93 will be described with reference to FIG. As described above, the temporary rendering unit 103 may generate a frame with the size of all multimedia data set to zero regardless of whether the width and height attributes are present, or the size of multimedia data that does not have the width and height attributes. May be set to zero, a frame may be generated with the size of multimedia data having the width and height attributes as the dot size indicated by the width and height attributes, and provisional rendering may be performed. In this example, the size of multimedia data not having the width and height attributes is set to zero, and the size of the multimedia data having the width and height attributes is provisionally rendered as the dot size indicated by the width and height attributes. Here, it is assumed that the multimedia data 93-1, 93-2, 93-3, 93-4, and 93-5 have no width and height attributes set, and the multimedia data 93-8 and 93-9. Assuming that the width and height attributes have already been set, the temporary rendering result is as shown in FIG. Here, the frames of the multimedia data 93-1, 93-2, 93-3, 93-4, 93-5, 93-8, 93-9 are converted into 93-1 ′, 93-2 ′, 93-3. ', 93-4', 93-5 ', 93-8', 93-9 '. Frames 93-1 ′, 93-2 ′, 93-3 ′, 93-4 ′, and 93-5 ′ are temporarily rendered with a size of zero because they are frames of multimedia data in which the width and height attributes are not set. The In FIG. 5, the frames 93-1 ′, 93-2 ′, 93-3 ′, 93-4 ′, and 93-5 ′ are displayed as small squares because of the visibility of the drawing, but the frames 93-1 ′ and 93 are displayed. Since −2 ′, 93-3 ′, 93-4 ′, and 93-5 ′ are zero, they are actually temporarily rendered as points. On the other hand, since the frames 93-8 'and 93-9' are frames of multimedia data in which the width and height attributes are already set, the frames 93-8 'and 93-9' are temporarily rendered with the dot size indicated by the width and height attributes. Here, the position of each multimedia data or text is determined by a relative relationship with the position of another multimedia data or text existing in the same web page. Therefore, by temporarily rendering the multimedia data 93-1, 93-2, 93-3, 93-4, 93-5 as zero size, the forms and display positions of the text 93-6, 93-7, It should be noted that the display positions of the media data 93-8 and 93-9 are different from the state shown in FIG. Here, the point at the upper left corner of the web page display screen is the origin of coordinates, the x-axis positive direction is the direction from the left side to the right side of the mobile terminal, and the y-axis positive direction is from the upper side to the lower side of the mobile terminal screen. The MMD position determination unit 106 compares the position information with the threshold value using the orientation and the coordinates of the upper left corner of each multimedia data as the position information. As a result of this comparison, the MM data positions 93-1-1, 93-2-1, 93-3-1, 93-4-1, 93-5-1 and 93-8-1 fall within one screen size. Therefore, it is determined that the MM data position 93-9-1 is out of one screen size. Accordingly, the multimedia data 93-1, 93-2, 93-3, 93-4, 93-5, 93-8 are downloaded by the MMD acquisition unit 107 and used for re-rendering. 9 is not downloaded at this stage and is not used for re-rendering.

  A case where the re-rendering unit 110 of the data download apparatus 100 executes re-rendering on the above-described provisional rendering result 93 ′ will be described with reference to FIG. 6. As described above, the re-rendering unit 110 re-renders the multimedia data determined to be within one screen size and the text of the linked web page. Here, the multimedia data 93-1, 93-2, 93-3, 93-4, 93-5, 93-8 is determined by the MMD position determination unit 106 to be within one screen size. Downloaded data is re-rendered. On the other hand, the multimedia data 93-9 is re-rendered because only the frame is re-rendered because the MMD position determination unit 106 determines that the multimedia data 93-9 is out of one screen size. Looking at the re-rendering result, for example, the downloaded and re-rendered multimedia data 93-8 is out of the one screen size, and the downloaded and re-rendered multimedia data is within the one screen size. It turns out that it is not necessarily a thing. This is because the display position of each multimedia data is shifted by performing temporary rendering with the size of the multimedia data having no width and height attributes set to zero. Further, most of the multimedia data 93-4 is displayed outside the size of one screen. This occurs by using the coordinates of the upper left corner of the multimedia data as position information. As described above, the data download apparatus 100 according to the present embodiment cannot accurately determine multimedia data that falls within one screen size, but can easily and quickly display multimedia data displayed within one screen. Since it can be discriminated, it is possible to pre-read multimedia data existing within the range of one screen together with text and reduce the experience time required for displaying a web page.

  In addition, although the present Example demonstrated as an example the link destination which exists in the web page which the user is browsing, the application range of this invention is not restricted to this. For example, even when the user is not browsing the web, log analysis is performed on a keyword that the user is usually interested in, the keyword is searched in advance using a search engine or the like, and the above-described processing is performed on the link destination URL of the search result. It is also possible to execute. Further, the above-described processing may be executed for a link destination URL described in a mail magazine registered by the user. In addition, regarding processing performed by portions (for example, the link destination URL extraction unit 101, the source acquisition unit 102, the screen display unit 115, etc.) whose processing contents overlap between the data download device 100 of this embodiment and the web browser provided in the mobile terminal. The data download device 100 may execute the process, or the web browser may perform the process, and the data download device 100 may not perform the process.

Claims (8)

A data download device for prefetching linked data,
A link destination URL extraction unit that extracts a link destination URL and outputs the link destination URL;
A source acquisition unit that acquires a source of a web page (hereinafter referred to as a link destination web page) existing in the output link destination URL, and outputs the source;
The output source is acquired, and the size of all multimedia data specified by the source is set to zero . All multimedia data frames specified by the source and the text of the linked web page And a temporary rendering unit for temporarily rendering and outputting the temporary rendering result;
An MMD position information acquisition unit that acquires position information of the multimedia data of the linked web page from the output temporary rendering result and outputs the position information;
An MMD position determination unit that outputs a comparison result of comparing the output position information with a predetermined threshold value for each multimedia data;
With reference to the output comparison result, an MMD acquisition unit that downloads multimedia data corresponding to the position information only when the position information is smaller than the threshold value;
A re-rendering unit that re-renders the downloaded multimedia data and the text of the linked web page and outputs the re-rendering result;
A data download device comprising: A data download device for prefetching linked data,
A link destination URL extraction unit that extracts a link destination URL and outputs the link destination URL;
A source acquisition unit that acquires a source of a web page (hereinafter referred to as a link destination web page) existing in the output link destination URL, and outputs the source;
Obtaining the output source, out of the multimedia data specified by the source , the size of the multimedia data not having the width and height attributes is set to zero, and all the multimedia specified by the source A temporary rendering unit that temporarily renders a frame of data and the text of the linked web page, and outputs the temporary rendering result;
An MMD position information acquisition unit that acquires position information of the multimedia data of the linked web page from the output temporary rendering result and outputs the position information;
An MMD position determination unit that outputs a comparison result of comparing the output position information with a predetermined threshold value for each multimedia data;
With reference to the output comparison result, an MMD acquisition unit that downloads multimedia data corresponding to the position information only when the position information is smaller than the threshold value;
A re-rendering unit that re-renders the downloaded multimedia data and the text of the linked web page and outputs the re-rendering result;
A data download device comprising: The data download device according to claim 1 or 2 ,
When the user accesses the linked web page, among the multimedia data specified by the source of the linked web page, the remaining data to start downloading the multimedia data that the MMD acquisition unit did not download A data download device further comprising an MMD acquisition unit. A data download device according to claim 1 or et 3,
The threshold is
A data download device, wherein the data download device is predetermined based on the number of dots in the vertical and horizontal directions of the mobile terminal screen. A data download method for prefetching linked data,
A link destination URL extracting step of extracting the link destination URL and outputting the link destination URL;
A source acquisition step of acquiring a source of a web page (hereinafter referred to as a link destination web page) existing in the output link destination URL, and outputting the source;
The output source is acquired, and the size of all multimedia data specified by the source is set to zero . All multimedia data frames specified by the source and the text of the linked web page And provisional rendering step for temporarily rendering and outputting the provisional rendering result;
An MMD position information acquisition step of acquiring position information of the multimedia data of the linked web page from the output temporary rendering result and outputting the position information;
An MMD position determination step of outputting a comparison result obtained by comparing the output position information with a predetermined threshold value for each multimedia data;
An MMD acquisition step of referring to the output comparison result and downloading multimedia data corresponding to the position information only when the position information is smaller than the threshold value;
A re-rendering step of re-rendering the downloaded multimedia data and the text of the linked web page and outputting the re-rendering result;
A data download method comprising: A data download method for prefetching linked data,
A link destination URL extracting step of extracting the link destination URL and outputting the link destination URL;
A source acquisition step of acquiring a source of a web page (hereinafter referred to as a link destination web page) existing in the output link destination URL, and outputting the source;
Obtaining the output source, out of the multimedia data specified by the source , the size of the multimedia data not having the width and height attributes is set to zero, and all the multimedia specified by the source A temporary rendering step of temporarily rendering a frame of data and the text of the linked web page and outputting the temporary rendering result;
An MMD position information acquisition step of acquiring position information of the multimedia data of the linked web page from the output temporary rendering result and outputting the position information;
An MMD position determination step of outputting a comparison result obtained by comparing the output position information with a predetermined threshold value for each multimedia data;
An MMD acquisition step of referring to the output comparison result and downloading multimedia data corresponding to the position information only when the position information is smaller than the threshold value;
A re-rendering step of re-rendering the downloaded multimedia data and the text of the linked web page and outputting the re-rendering result;
A data download method comprising: The data download method according to claim 5 or 6 ,
When the user accesses the linked web page, among the multimedia data specified by the source of the linked web page, the remaining download data that has not been downloaded by the MMD acquisition step is started. A data download method, further comprising an MMD acquisition step. A data download method according to any one of claims 5 to 7 ,
The threshold is
A data download method characterized in that it is determined in advance based on the number of dots in the vertical and horizontal directions of the mobile terminal screen.

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