JP2006084609A - Content display control device, content display device, method, program, and recording medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a content display control device capable of controlling scroll display so that users may not need unnecessary scroll operation when contents are displayed on a display device in a scrollable mode. <P>SOLUTION: A scroll display means defines a scrolling region 24 within a region (display element including region 23) where display position indicating information (information for indicating a display position) exists, in the region where contents to be displayed occupy (a region 22 in a virtual screen). The contents include display position indicating information illustrated with Broadcast Marked Language (BML) elements 21a, 21b and 21c with characteristics which specify the display position on the virtual screen, such as, for example, left, top, width and height. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a content display control device, a content display device, a method, a program, and a recording medium. More specifically, the present invention relates to a content display control device that performs control when scrolling content, and a content display device including the device. The present invention relates to a content display control method, a content display control program, and a computer-readable recording medium on which the program is recorded. The present invention is also applicable to a device having a content display function of a C profile basic receiver for data broadcasting of terrestrial digital television broadcasting, for example.

  Conventionally, when the display area on the display device of the device is smaller than the region occupied by the content to be displayed, a part of the region occupied by the content to be displayed is scrolled on the display device of the device. Content is displayed, and a scroll indicator is displayed outside the content display area, for example, at the right end or the lower end. Here, the area occupied by the content to be displayed is an area occupied by the content as received from the broadcast (transmission) side of the content on the reception side.

  However, even if the content display element exists in only a small range at the top of the virtual screen of data broadcasting, the entire range of the virtual screen is subject to scroll display, so the user can scroll. If the operation is not performed and the lower part is displayed and checked, it is not known whether there is a display element, and the user is caused to perform a useless operation.

  As described above, according to the conventional technology, even when the content display element exists only in a very small range at the top of the data broadcasting virtual screen, the user performs the scroll operation, If it is not displayed and checked, it is not known whether there is a display element, and the user is made to perform a useless operation. This occurs even when the content is data broadcasting content of digital terrestrial television broadcasting, especially for a mobile device such as a mobile phone having a small actual display area in the display device as a receiver. Is particularly noticeable because a scroll operation is essential.

  The present invention has been made in view of the above circumstances, and when displaying content on a display device in a scrollable manner, scroll display control is performed so that a user does not perform a useless scroll operation. An object is to provide a content display control device, a content display device including the device, a content display control method, a content display control program, and a computer-readable recording medium on which the program is recorded.

  The present invention is constituted by the following technical means in order to solve the above-described problems.

  The first technical means is a content display control device that controls the display of content on the display device, and displays when the display area on the display device is smaller than the area occupied by the content to be displayed. Scroll display means for displaying a part of the area occupied by the content to be displayed on the display device in a scrollable manner, wherein the content includes display position designation information for designating a display position, and the scroll display means includes the display The area to be scrolled is limited to the area where the display position designation information exists in the area occupied by the content to be recorded.

  According to a second technical means, in the first technical means, the content is content described in a markup language including the display position designation information.

  According to a third technical means, in the second technical means, the content is a data broadcast content of BML (Broadcast Marked Language) description received by a C profile basic receiver of data broadcasting of digital terrestrial television broadcasting, and the display The position designation information is characterized in that it is information of a BML element to which any one of the characteristic values left, top, width, and height is applied.

  According to a fourth technical means, in the third technical means, the display position designation information is included in a body element in addition to information on a BML element to which any one of the characteristic values left, top, width, and height is applied. As the information of the characteristic value background-image, the scroll display means includes an area where a BML element to which any one of the characteristic values left, top, width, and height is applied exists among the area occupied by the content to be displayed. And, based on the characteristic value background-image, the scrolling range is limited to a range in which at least one of the areas occupied by one background image exists when the background image is arranged from the origin of the virtual screen. Is.

  A fifth technical means is characterized in that, in the third or fourth technical means, an element whose characteristic value visibility is hidden is not handled as the display position designation information among the BML elements.

  A sixth technical means includes the content display control device according to any one of the first to fifth technical means, and the display device whose content display is controlled by the content display control device. It is a content display device.

  A seventh technical means is a content display control method for controlling the display of content on the display device, and displays when the display area on the display device is smaller than the area occupied by the content to be displayed. A scroll display step for scrollably displaying a part of an area occupied by the content to be displayed on the display device, and the content includes display position designation information for designating a display position, and the scroll display step includes: The method includes a step of limiting a scrolling range to an area where the display position designation information exists among areas occupied by the content to be displayed.

  The eighth technical means is a content display control program for causing a computer to function as the content display control device in any one of the first to fifth technical means and controlling display of content on the display device.

  The ninth technical means is a computer-readable recording medium on which the content display control program in the eighth technical means is recorded.

  According to the present invention, when content is displayed on a display device in a scrollable manner, scroll display control can be performed so that the user does not perform useless scroll operations.

  The present invention relates to a content display control device, a content display device, a content display control method, a content display control program for realizing the function of the content display control device, and a computer-readable record in which the content display control program is recorded. It is a medium.

  The content display control device according to the present invention is a device that controls content display in the display device, controls scroll display, and preferably includes display of a scroll indicator. The content display control apparatus according to the present invention can also be incorporated as a system LSI (Large Scale Integrated Circuit) or the like. A content display device according to the present invention is a device that includes the content display control device and a display device in which content display (including playback) is controlled by the content display control device. Although it can be applied to a general-purpose personal computer (hereinafter abbreviated as a PC) including modules such as a receiver, a content reproduction program, a video card (also referred to as a video adapter), a mobile phone or a portable information terminal ( The present invention can be applied particularly advantageously to a device having a small display screen such as a PDA). Further, in the present invention, the distribution and broadcasting form of the content are basically not limited, but can be applied to data broadcasting of terrestrial digital television broadcasting as will be described later. This is particularly useful in content display on a device having a content display function.

  Further, the content display control program according to the present invention is a program for causing a computer to function as the content display control device exemplified here and controlling the display of content on the display device. That is, the content display control program is incorporated in a storage memory in the content display control device and executed by being read out to a working memory, and controls a calculation device such as a CPU in the device to display the display according to the present invention. The control function is realized, and detailed description thereof is omitted. Further, the recording medium on which the program is recorded may be a recording medium that can be read by a content display control device including such an arithmetic device and a memory through a general-purpose computer as necessary. Detailed description thereof will be omitted. The content display control method according to the present invention is a method for controlling the display of content on the display device, and is a method for executing a process in the content display control device or a process procedure in the content control program. Only a part thereof will be described with reference to a flowchart, but detailed description thereof will be omitted.

  The content display control apparatus according to the present invention includes, as a feature thereof, scroll display means described below. The scroll display means is a means for scrollably displaying a part of the area occupied by the content to be displayed on the display device when the display area on the display device is smaller than the area occupied by the content to be displayed. is there. The scroll instruction is usually input by the user, and a part of the area occupied by the content to be displayed at that time is displayed by scrolling based on the instruction. The scroll display means according to the present invention is characterized in that the scrolling range is limited to the area where the display position designation information exists among the area occupied by the content to be displayed. However, the content includes the display position designation information that is information for designating the display position. For example, the content may be content described in a markup language including the display position designation information.

  According to this embodiment, when the content is displayed on the display device in a scrollable manner, the scroll display control can be performed so that the user does not perform an unnecessary scroll operation.

  As another embodiment of the present invention, the content is data broadcast content of BML (Broadcast Marked Language) description received by a C profile basic receiver of data broadcasting of digital terrestrial television broadcasting, and display position designation information is: Information on the BML element to which any of the characteristic values left, top, width, and height is applied may be used. In this embodiment, it can be implemented by a device having at least the function of the C profile basic receiver, and when scrolling and displaying a part of the virtual screen of the data broadcast on the display device of the device, the range to be scrolled is represented by the data The broadcast virtual screen area is limited to a range in which each BML element to which the characteristic values “left”, “top”, “width”, and “height” are applied exists. In this embodiment, by limiting the scroll range as described above, an area where no BML element is present is prevented from being scrolled and the user is prevented from performing a wasteful operation.

  As another embodiment of the present invention, when the display position designation information is a BML element as described above, when the body element has a background-image characteristic and a background image exists, at least this scroll range is set. It is preferable that the background image can be confirmed. In this embodiment, the display position designation information is information on the characteristic value “background-image” included in the “body” element in addition to the information on the BML element to which any of the characteristic values “left”, “top”, “width”, and “height” is applied. Then, the scroll display means performs virtual processing based on the region where the BML element to which any one of the characteristic values “left”, “top”, “width”, and “height” is applied, and the characteristic value “background-image”. When the background image is arranged from the origin of the screen, the scrolling range is limited to a range in which at least one of the areas occupied by one background image exists. Then, the scrolling operation is performed based on this limitation.

  Hereinafter, the embodiments described above will be described in detail with reference to the drawings.

  FIG. 1 is a schematic diagram illustrating a configuration example of a content display device according to an embodiment of the present invention, in which 1 is a content display control device, 2 is a display device, 11 is a BML element acquisition unit, and 12 is a BML element. Drawing means, 13 a virtual screen generation means, 14 a display range acquisition means, 15 a BML element range acquisition means, 16 a range addition means, 17 a scroll control means, and 18 a scroll instruction means. The scroll display means described above corresponds to these means 11 to 18 in this configuration example. In FIG. 1, thick line arrows indicate image information transmission paths, and thin line arrows indicate control signal transmission paths.

  The content display control apparatus 1 illustrated in FIG. 1 includes a BML element acquisition unit 11, a BML element drawing unit 12, a virtual screen generation unit 13, a display range acquisition unit 14, a BML element range acquisition unit 15, a range addition unit 16, and scroll control. Means 17 and scroll instruction means 18 are provided. The display device 2 is a device equipped in the content display device that receives and displays the display image acquired by the display range acquisition unit 14 in the content display control device 1. Moreover, this content display device may naturally be mounted on a device together with a device having other functions.

  The BML element acquisition unit 11 acquires each display element of content (BML document). This display element is output to the BML element drawing unit 12 and the BML element range acquisition unit 15. The BML element drawing unit 12 receives each BML element acquired and output by the BML element acquisition unit 11 and generates a display image thereof. This display image is output to the virtual screen generating means 13, and this display image may include a background image of the body element.

  The BML element range acquisition unit 15 receives each BML element output from the BML element acquisition unit 11, acquires a region where each is arranged on the virtual screen, and outputs an element region control signal. When the BML element is a body element and a background image exists, the area occupied by the background image is output as the element area control signal when the background image is arranged from the origin on the virtual screen. This element area control signal is output to the virtual screen generation means 13 and the range addition means 16.

  The virtual screen generation means 13 should arrange and display each display image output from the BML element drawing means 12 in the range specified by the element area control signal output from the BML element range acquisition means 15 on the virtual screen. A display image of the entire BML document is generated. The display image generated on the virtual screen is output to the display range acquisition unit 14.

  The range adding means 16 synthesizes the areas specified by the element area control signals output from the BML element range acquisition means 15, finds an area that includes all display elements, and outputs it as a scroll range control signal. This scroll range control signal is output to the scroll control means 17. The scroll instruction means 18 outputs a scroll instruction control signal indicating that scrolling is performed by a user operation. This scroll instruction control signal is output to the scroll control means 17.

  The scroll control means 17 receives the scroll instruction control signal output from the scroll instruction means 18, calculates an area to be displayed on the display device 2, and outputs a display area instruction control signal. This display area instruction signal is limited within the range of the area indicated by the scroll range control signal output from the range addition means 16 in the display image on the virtual screen, and is output to the display range acquisition means 14.

  The display range acquisition unit 14 acquires the display image of the area indicated by the display range selection signal output from the scroll control unit 17 from the display image on the virtual screen output from the virtual screen generation unit 13. This display image is output to the display device 2.

  In the present embodiment, with the configuration as described above, when there is content, the BML element acquisition unit 11 acquires each BML element included in the BML document and sequentially outputs it to the BML element drawing unit 12. The means 12 generates bitmap data of the display image and outputs it to the virtual screen generation means 13.

  On the other hand, each BML element acquired by the BML element acquisition unit 11 is simultaneously output to the BML element range acquisition unit 15. The BML element range acquisition means 15 extracts characteristic values that specify the display range on the virtual screen, such as left, top, width, and height, included in each BML element, and determines the range on the virtual screen occupied by these BML elements. The designated element region control signal is output to the virtual screen generation means 13 and the range addition means 16.

  The virtual screen generation means 13 arranges the bitmap data of the display image at a designated position on the virtual screen, and generates a virtual screen image of the entire BML document. At the same time, the range adding means 16 synthesizes the areas specified by the element area control signals, obtains an area that includes all the display elements, and outputs it to the scroll control means 17 as a scroll range control signal.

  Immediately after starting the display of the BML document, in the state where the user has not yet performed the scroll operation, the head of the area indicated by the scroll range control signal output from the scroll control means 17, that is, the area including the BML element to be displayed. A display area instruction control signal indicating this area is output to the display range acquisition means 14.

  In the display range acquisition means 14, the display image of the area indicated by the display area instruction control signal from the current display position on the virtual screen, that is, the first area in the area including the BML element to be displayed is displayed on the display device 2. Output. When the user performs a downward scroll operation from this state, the scroll instruction means 18 outputs a downward scroll instruction control signal to the scroll control means 17. Upon receiving the downward scroll instruction control signal, the scroll control means 17 basically outputs a scroll range control signal indicating a position below the current display position by a predetermined amount. The scrolling range is limited by the scrolling range control signal output from the adding means 16, and the operation is performed so that it is not possible to scroll to a region having no display element. Therefore, the display image of the area below the current display position by a predetermined amount within the range of the area including the BML element to be displayed is output to the display device 2.

  In this way, when the user scrolls in the vertical direction, the scroll range is always limited by the scroll range control signal output by the range adding means 16 and the scrolling is performed within the range where the display element exists. .

  In addition, among the BML elements, there is a BML element that does not display although it occupies an area on the virtual screen because the characteristic value visibility is hidden. In this case, by controlling the BML element range acquisition unit 15 not to output the element region control signal to the range addition unit 16, or by controlling the range addition unit 16 not to receive this element region control signal, It is preferable to operate so as not to enter the scroll range. In this form, among the BML elements, an element whose characteristic value visibility is hidden is not handled as display position designation information, and an area in which such a BML element exists is not included in the scroll range. . When there is a BML element that is not displayed, the element is not included in the scroll display range, so that a user does not need to perform an unnecessary operation.

  Furthermore, in the content display device according to the present invention, as described above, it is possible to prevent a user's useless scroll operation when displaying data broadcast content of digital terrestrial television broadcasting. Therefore, a mobile phone having a terrestrial digital television broadcast reception function and a data broadcast presentation function will be described as an example of an apparatus to which the content display apparatus according to the present invention is applied.

  In the data broadcasting standard for terrestrial digital television broadcasting, several profiles are defined depending on devices to be mounted, and among them, a C profile is defined for portable devices such as a mobile phone. This portable device broadcast is performed using a high-compression codec such as MPEG4 (Moving Picture Experts Group 4) using one segment of the TV channel band divided into 13 segments. The receiving side mobile device is equipped with a 1 SEG demodulation LSI and the like. In the C profile, the area of the virtual screen used for data broadcast display is defined as 240 pixels in the horizontal direction × 480 pixels in the vertical direction. Compared with this, the display area of the display device of the mainstream mobile phone is small, just 240 pixels in the horizontal direction × 320 pixels in the vertical direction, but in reality, display of mobile phone icons, television screens, etc. Therefore, the area that can be used as data broadcasting content is, for example, only about 100 pixels in the vertical direction. For this reason, a scroll operation is essential to display the entire area of the virtual screen.

  Therefore, the content display control apparatus according to the present invention can be effectively applied to terrestrial digital television broadcasts and terrestrial digital audio broadcasts, particularly 1 SEG broadcasts. For example, the content display control program according to the present invention may be stored in an apparatus having a reception function for receiving such a broadcast so as to be executable as an application such as a browser.

  For example, this embodiment will be described on the assumption that an area for displaying data broadcast content in a display device on a mobile phone displays a range of 100 pixels in the vertical direction and 240 pixels in the horizontal direction.

  First, when the display of data broadcasting is started, in the initial state, a range of 100 pixels in the vertical direction and 240 pixels in the horizontal direction is displayed on the display device from the beginning of the area where the BML element exists in the virtual screen of the data broadcasting.

Here, the range in which the BML element exists will be described with reference to FIGS.
FIG. 2 is a diagram for explaining an example of a scroll range when there is no background image, which is limited in the content display control apparatus according to the present invention. In the figure, 21a, 21b, and 21c are BML display elements, and 22 is The virtual screen range, 23 is a display element content range, and 24 is a scroll range.

  The BML display elements 21a, 21b, and 21c are BML elements having characteristic values such as left, top, width, and height for designating a display position on the virtual screen (also referred to as a display range on the virtual screen). Specifically, there are a div element, a p element, a pre element, a form element, an input element, a textarea element, an object element, an img element, and the like. The virtual screen range 22 is a range in which a display image of content is generated on the virtual screen. The display element containing range 23 is an area including all the BML elements to be displayed. The scroll range 24 includes a display element containing range 23. In FIG. 2, since there is no background image, that is, when the background-image characteristic value is not set in the body element, the display element containing range 23 is obtained only from the area where the BML element exists.

  FIG. 3 is a diagram for explaining an example of a scroll range in the case of only a background image, which is limited in the content display control apparatus according to the present invention, in which 30 is a background image pattern, and 32 is a virtual screen range. , 33 is a display element containing range, and 34 is a scroll range.

  The background image pattern 30 is a pattern of background image data specified by the background-image characteristic value of the body element. The virtual screen range 32, the display element containing range 33, and the scroll range 34 are as described in FIG. However, since the example of FIG. 3 has only a background image and no other BML elements, a range in which one background image pattern 30 is displayed from the origin of the virtual screen is obtained as the display element containing range 33. . Actually, the background image is repeatedly developed with the background image pattern 30 over the entire range 32 of the virtual screen.

  FIG. 4 shows an example of the scroll range when there is a background image, which is limited in the content display control device according to the present invention, in which a BML element exists rather than the position of the base of the area where one background image pattern is displayed. In the figure, 40 is a background image pattern, 41a, 41b, and 41c are BML display elements, 42 is a virtual screen range, and 43 is a display. Element content range 44 is a scroll range.

  The background image pattern 40, the BML display elements 41a, 41b, and 41c, the virtual screen range 42, the display element containing range 43, and the scroll range 44 are as described in FIGS. However, since the example of FIG. 4 includes a background image and a BML element, it includes both an area where the BML element exists and an area where one background image pattern 40 is displayed from the origin of the virtual screen. A display element containing range 43 is obtained as the region.

  FIG. 5 shows an example of a scroll range when there is a background image, which is limited in the content display control apparatus according to the present invention, by displaying one background image pattern rather than the position of the bottom side of the region where the BML element exists. In the figure, 50 is a background image pattern, 51a, 51b, and 51c are BML display elements, 52 is a virtual screen range, and 53 is a display. Element content range, 54 is a scroll range.

  The background image pattern 50, the BML display elements 51a, 51b, and 51c, the virtual screen range 52, the display element containing range 53, and the scroll range 54 are as described with reference to FIGS. However, since the example of FIG. 5 includes a background image and a BML element, it includes both an area where the BML element exists and an area where one background image pattern 50 is displayed from the origin of the virtual screen. As a region, a display element containing range 53 is obtained.

  In each example described above, the scroll range is a region including at least the display element containing range, but may be set so as to have some margin around the display element containing range.

  Next, taking the BML document in the case of FIG. 4 as an example, the display element content range will be obtained with reference to FIG. FIG. 6 is a flowchart for explaining an example of display element content range derivation in the content display control apparatus according to the present invention.

  The BML document in the case of FIG. 4 is specifically as follows. Here, unnecessary parts are omitted for the sake of simplicity.

<Body style = “background-image: url (image.jpg);”>
<P style = “left: 50 px; top: 30 px; width: 140 px; height: 40 px;”>
~
</ P>
<Div style = “left: 80 px; top: 100 px; width: 80 px; height: 10 px;”>
~
</ Div>
<Div style = “left: 80 px; top: 140 px; width: 80 px; height: 10 px;”>
~
</ Div>
</ Body>

  The background image is image. It is assumed that jpg is specified and the size is 140 pixels in the horizontal direction (width: 140 px) × 120 pixels in the vertical direction (height: 120 px). As other BML elements, there are two p elements and div elements.

  For the display element containing range to be obtained, the left side position is left_d, the right side position is right_d, the top side position is top_d, and the bottom side position is bottom_d. It should be noted that bottom_d and right_d are not included in the range, and left_d to right_d-1 in the horizontal direction and top_d to bottom_d-1 in the vertical direction, respectively.

  In FIG. 6, the display element containing range is initialized in step S1. Specifically, for example, initialization is performed to values outside the range of the BML virtual screen (left_d = 241, right_d = 0, top_d = 481, bottom_d = 0).

  Next, one BML element is acquired in step S2. Since the body element is acquired first, the answer is Yes in step S3, and the process proceeds to step S7. In step S7, since the background-image characteristic value exists in the body element, the answer is Yes, and the process proceeds to step S8. In step S8, the image file image.designated by background-image. Get the image size of jpg. In fact, image. Since the image size is written in the header portion of the jpg file, acquisition is performed by reading the file. Here, the width is 140 px and the height is 120 px by assumption. Further, since this background image data is developed from the origin of the virtual screen, it is left: 0px, top: 0px. Then, it progresses to step S9 and this range is added to a display element containing range. Specifically, the following calculation is performed.

If left_d> left, left_d = left (1)
If top_d> top, top_d = top (2)
If right_d <(left + width), right_d = left + width (3)
If bottom_d <(top + height), bottom_d = top + height (4)

  From the above equation (1), since left_d (= 241)> left (= 0), left_d = left = 0. According to the above equation (2), since top_d (= 481)> top (= 0), top_d = top = 0. According to the above equation (3), since right_d (= 0) <(left + width) (= 140), right_d = left + width = 140. From the above equation (4), bottom_d (= 0) <(top + height) (= 120), so bottom_d = top + height = 120. The display element containing ranges at this time are left_d = 0, top_d = 0, right_d = 140, and bottom_d = 120.

  Next, in step S10, since there is still a BML element, it becomes Yes and proceeds to step S2. In step S2, the p element which is the next element is acquired. Then, it becomes No at step S3 and proceeds to step S4. In step S4, the visibility characteristic is confirmed. However, since there is no designation of visibility, the result is No, and the process proceeds to step S5. In step S5, characteristic values left: 50 px, top: 30 px, width: 140 px, height: 40 px are acquired. Then, in step S6, it is confirmed whether or not this element is completely out of the range of the virtual screen. This is because there is no need to draw when it is completely out of the range of the virtual screen. Specifically, it is out of range if any of the following is true.

If (left + width) <0, out of range (5)
If (top + height) <0, out of range (6)
If left ≧ 240, out of range (7)
If top ≧ 480, out of range (8)

  According to the above equation (5), not (left + width) (= 190) <0, but according to the above equation (6), not (top + height) (= 70) <0, but according to the above equation (7), left (= 50) Since it is not ≧ 240 but top (= 30) ≧ 480 according to the above equation (8), it is determined that this element is not out of the range of the virtual screen, No in step S6, and the process proceeds to step S9. The calculations of the equations (1) to (4) are performed. According to Expression (1), left_d (= 0)> left (= 50) is not satisfied. According to Expression (2), top_d (= 0)> top (= 30) is not satisfied. According to the expression (3), since right_d (= 140) <(left + width) (= 190), right_d = left + width = 190. According to equation (4), bottom_d (= 120) <(top + height) (= 70) is not satisfied. The display element containing ranges at this time are left_d = 0, top_d = 0, right_d = 190, bottom_d = 120.

  Next, in step S10, since there is still a BML element, it becomes Yes and proceeds to step S2. When the same processing is performed for the subsequent two div elements, the display element inclusion ranges of the first div element at the time of completion of step S9 are left_d = 0, top_d = 0, right_d = 190, bottom_d = 120, and the display element inclusion ranges of the second div element when step S9 is completed are left_d = 0, top_d = 0, right_d = 190, and bottom_d = 150.

  In this way, after all the display elements included in the BML document have been processed, No is determined in step S10, and the process is terminated.

  Next, the scroll range is obtained from the display element containing range obtained by the process described in FIG. Let the left side position of the desired scroll range region be left_s, the right side position is right_s, the top side position is top_s, and the bottom side position is bottom_s. Here, bottom_s and right_s are not included in the range in the same manner as the display element-containing range. First, since the scroll range is an area including at least the display element containing range, the following expression is established.

left_s = left_dm (9)
top_s = top_dm (10)
right_s = right_d + m (11)
bottom_s = bottom_d + m (12)

  In the above formula, m is a margin, and in the above formula, all four sides have a common value, but of course, a different value may be used for each side, or m = 0. Assuming that m = 10, left_s = −10, top_s = −10, right_s = 200, and bottom_s = 160 from the above equations (9) to (12).

  Next, since the scrolling range is the display range on the virtual screen, the following processing is performed.

If left_s <0, left_s = 0 (13)
If top_s <0, top_s = 0 (14)
If right_s> 240, right_s = 240 (15)
If bottom_s> 480, bottom_s = 480 (16)

  From the above equations (13) to (16), left_s = 0, top_s = 0, right_s = 200, and bottom_s = 160 are obtained.

  Thus, since the scroll range was calculated | required, what is necessary is just to carry out the scroll display of this range.

  Depending on the display device, the above-described range may be displayed at one time, and in this case, scroll display is unnecessary. For example, the range that can be displayed at once by the display device of the present embodiment is 100 pixels in the vertical direction and 240 pixels in the horizontal direction, so the horizontal scroll width right_s-left_s = 200 can be displayed in the horizontal direction of the display device. Since the width is smaller than 240 pixels, it is not necessary to scroll and the entire area can be displayed. Since the vertical scroll width bottom_s-top_s = 160 exceeds the displayable width of 100 pixels in the horizontal direction of the display device, it must be scrolled and displayed.

  Further, in the present embodiment, the flow and expression as described above are used as an example of a method for obtaining the scroll range. Not what you want.

It is the schematic which shows the structural example of the content display apparatus which concerns on one Embodiment of this invention. It is a figure for demonstrating an example of the scroll range when there is no background image limited in the content display control apparatus which concerns on this invention. It is a figure for demonstrating an example of the scroll range in the case of only a background image limited in the content display control apparatus which concerns on this invention. An example of the scroll range when there is a background image, which is limited in the content display control device according to the present invention, is the base of the region where the BML element exists rather than the position of the base of the region where one background image pattern is displayed. It is a figure for demonstrating the case where the position of is below. An example of the scroll range in the case where there is a background image, which is limited in the content display control device according to the present invention, is the base of the area where one background image pattern is displayed rather than the position of the base of the area where the BML element exists. It is a figure for demonstrating the case where the position of is below. It is a flowchart for demonstrating the example of display element content range derivation | leading-out in the content display control apparatus which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Content display control apparatus, 2 ... Display apparatus, 11 ... BML element acquisition means, 12 ... BML element drawing means, 13 ... Virtual screen generation means, 14 ... Display range acquisition means, 15 ... BML element range acquisition means, 16 ... Range addition means, 17 ... scroll control means, 18 ... scroll instruction means, 21a, 21b, 21c, 41a, 41b, 41c, 51a, 51b, 51c ... BML display elements, 22, 32, 42, 52 ... virtual screen range , 23, 33, 43, 53 ... display element inclusion range, 24, 34, 44, 54 ... scroll range, 30, 40, 50 ... background image pattern.

Claims (9)

  A content display control device for controlling display of content on a display device, wherein a portion of a region occupied by content to be displayed is smaller when a display region on the display device is smaller than a region occupied by content to be displayed Scroll display means for displaying the image on the display device in a scrollable manner, wherein the content includes display position designation information for designating a display position, and the scroll display means includes an area occupied by the content to be displayed. A content display control apparatus, wherein a scrolling range is limited to an area where the display position designation information exists.   The content display control apparatus according to claim 1, wherein the content is content described in a markup language including the display position designation information.   The content is data broadcasting content of BML (Broadcast Marked Language) description received by a C profile basic receiver of data broadcasting of terrestrial digital television broadcasting, and the display position designation information includes characteristic values left, top, width, height The content display control apparatus according to claim 2, wherein any one of the BML elements is applied.   The display position designation information is information on a characteristic value bakground-image included in a body element in addition to information on a BML element to which any of the characteristic values left, top, width, and height is applied. In the area occupied by the content to be displayed, an area where a BML element to which any one of the characteristic values left, top, width, and height is applied, and the origin of the virtual screen based on the characteristic value background-image 4. The content display control apparatus according to claim 3, wherein the scrolling range is limited to a range in which at least one of the areas occupied by one background image when the background image is arranged.   The content display control apparatus according to claim 3 or 4, wherein an element whose characteristic value visibility is hidden is not handled as the display position designation information among the BML elements.   6. A content display device comprising: the content display control device according to claim 1; and the display device whose content display is controlled by the content display control device.   A content display control method for controlling display of content on a display device, wherein a portion of a region occupied by content to be displayed is smaller when a display region on the display device is smaller than a region occupied by content to be displayed A scroll display step for displaying the image on the display device in a scrollable manner, and the content includes display position designation information for designating a display position, and the scroll display step occupies the content to be displayed. The content display control method characterized by including the step which limits the range to scroll to the area | region where the said display position designation | designated information exists among area | regions.   A content display control program for causing a computer to function as the content display control device according to any one of claims 1 to 5 and controlling display of content on the display device.   A computer-readable recording medium on which the content display control program according to claim 8 is recorded.

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