JP2008294591A - Content data providing device and content display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To implement a content display device for displaying a content with a layout according to a content display size, and a content data providing device for providing the content display device with content data. <P>SOLUTION: The content providing device includes: a content request reception part 15 for acquiring content display size specification information capable of specifying a content display size of a TV 30; a layout selection part 12 for selecting a layout of the content on the basis of the display size specification information; and a content data transmission part 16 for providing the TV 30 with content data for displaying the content with the selected layout. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a content data providing device that provides content data to a content display device. The present invention also relates to a content display device that displays content based on content data provided from a content data providing device.

  Various content display devices that display content are widely used.

  An example of a content display device is a television that displays broadcast content. A conventional television that displays broadcast content has the following characteristics.

  That is, the conventional television displays the same broadcast content regardless of the screen size. That is, the same content is displayed on both a television with a 10-inch display and a television with a 50-inch display. The viewer unconsciously adjusts the distance from the television and views the television from an easy-to-see position.

  A conventional television basically displays one content on one screen. There are televisions that can simultaneously display a plurality of contents that are broadcast at the same time. In this case as well, the viewer views one of the contents. With the spread of terrestrial digital broadcasting, televisions that support BML (Broadcast Markup Language) have also appeared. In this case, the broadcast content and character information are displayed in a certain layout.

  When displaying the same character information on televisions having different screen sizes, the following problems may occur. That is, as shown in FIG. 5, when character information of an appropriate number of characters to be displayed on a 20-inch screen is displayed on a 10-inch screen, a screen 703 is obtained, and the amount of information per area is large. The characters are too small to read. On the other hand, when displayed on a 50-inch screen, the amount of information per area is small as in the screen 702, and characters are displayed too large and can be read, but this is wasteful.

  In order to solve such a problem, it is necessary to display content in a layout according to the screen size of the content display device.

Patent Document 1 discloses a method of displaying two-dimensional code data by changing it to an optimum size according to the screen size of a display to be displayed. Specifically, two-dimensional code data corresponding to the display screen size is selected from a plurality of two-dimensional code data corresponding to each display screen size and displayed on the display.
JP 2006-238010 A (published September 7, 2006)

  Currently, there are a variety of content display devices ranging from mobile phones and PDAs having a small display with a screen size of several inches to a television with a large display with a screen size of 100 inches. In these content display devices, when the same content is displayed, it is difficult to present the content to the user in an easy-to-read state with the above-described configuration.

  The present invention has been made in view of the above problems, and provides a content display device that displays content in a layout according to the content display size, and a content data providing device that provides content data to such a content display device. It is to be realized.

In order to solve the above problems, the content data providing apparatus according to the present invention provides:
Content display size specifying information acquiring means for acquiring content display size specifying information capable of specifying the content display size of the content display device, layout selecting means for selecting a layout of the content based on the content display size specifying information, and Content data providing means for providing content data for displaying the content in the layout to the content display device,
It is characterized by that.

  According to said structure, the said content data provision apparatus can provide the said content display apparatus with the content data which displays the said content by the layout selected according to the content display size of the said content display apparatus. Therefore, the content display device can display the content in a layout corresponding to the content display size using the content data provided from the content data providing device.

  In addition, for a service provider that provides content data to the content display device, the layout of content displayed on the content display device is defined in detail for each content display size (for example, screen size) of the content display device. There is a merit that it becomes possible to do.

  In addition, since the content display device is displayed in a layout corresponding to the content display size of the content display device (for example, the screen size or the user agent of the browser), the user can view the content without a sense of incongruity. There is a merit.

  In addition, the layout when the content is displayed on the content display device is determined not by a program fixedly stored in the content display device but by selection of a layout in the content data providing device. Therefore, there is a merit that the business operator who incorporates the program into the content display device is freed from the need to change the program incorporated into the content display device in order to change the layout of the content displayed on the content display device. is there.

The content data providing apparatus according to the present invention further includes:
The content display size specifying information preferably includes screen size information indicating a screen size of the content display device.

  With the above configuration, the content display device can display the content in a layout according to the screen size of the content display device, using the content data provided from the content data providing device. There is an effect that can be done.

  In addition to the content display size specifying information (screen size information), the content data providing device includes user request information acquisition means for acquiring user request information indicating a user request of the content display device from the content display device. Further, the layout selecting means may select the layout of the content based on the user request information in addition to the screen size information.

  In this case, in addition to the content display size (screen size) of the content display device, the content data providing device displays the content data for displaying the content in a layout suitable for the request of the user of the content display device. It can be provided to a content display device. That is, there is an advantage that the user who uses the content display device can use the content displayed in a desired layout.

  Note that the layout selection unit selects, for example, a plurality of layout descriptions prepared in advance and selects a layout description corresponding to the screen size information from a plurality of layout descriptions defining different layouts. The layout may be selected. The content data providing apparatus may further include content data synthesizing means for synthesizing the selected layout description and various display data. Here, the display data combined with the layout description may be any data used for display, such as text data, moving image data, and still image data.

  The layout selection means is replaced with a synthesis rule selection means for selecting a synthesis rule corresponding to the screen size from a plurality of synthesis rules prepared in advance, and the content data synthesis means is replaced with the selected synthesis rule. Accordingly, the same effect as described above can be obtained even if the content data synthesizing means for synthesizing various display data is replaced.

In order to solve the above problems, the content display device according to the present invention provides:
A content display device that displays content using content data acquired from a content data providing device, and that provides content display size specifying information capable of specifying a content display size for displaying the content to the content data providing device It is characterized by comprising display size specifying information providing means.

  According to said structure, the said content display apparatus provides the said content data provision apparatus with the content display size specific information which can specify the content display size which displays the said content. Therefore, the content data providing device selects a layout according to the content display size specified by the content display device based on the content display size specifying information, or displays the content in the selected layout. This content data can be provided to the content display device.

  Note that the content data display device includes screen size information providing means for providing the content data providing device with screen size information indicating the screen size of the screen on which the content is displayed, instead of the content display size specifying information providing device. You may have. In this case, the screen size information only needs to indicate the size of the screen on which the content is displayed, and may indicate the screen size of the built-in display built in the content display device. It may indicate the screen size of an external display connected to the display device.

  Examples of the content display device that displays content on an external display include a recorder, a printer, an STB, and the like in addition to a personal computer that does not have a built-in display. In this case, the content display device detects the screen size of the external display, and provides screen size information indicating the detected screen size of the external display to the content data providing device.

  Note that a content display system including the content data providing apparatus and the content display apparatus can also be included in the technical category of the present invention.

  Also, a program for operating the content data providing apparatus, a program for causing a computer to function as each means included in the content data providing apparatus, and a program for operating the content display apparatus Thus, a program for causing a computer to function as each means included in the content display device can also be included in the technical category of the present invention. Further, a computer-readable recording medium in which these programs are recorded can also be included in the technical category of the present invention.

  As described above, the content data providing apparatus according to the present invention includes content display size specifying information acquisition means for acquiring content display size specifying information capable of specifying the content display size of the content display apparatus, and the content layout as the content display. Layout selecting means for selecting based on size specifying information; and content data providing means for providing content data for displaying the content in the selected layout to the content display device. Therefore, in the content display device that displays content based on the content data provided from the content data providing device, it is possible to display the content with a layout corresponding to the content display size.

  Embodiments according to the present invention will be described below with reference to FIGS. In the present embodiment, as an example, a case where the content data providing apparatus of the present invention is applied to a content display system will be described. In the present embodiment, the content data providing apparatus applied to the content display system will be described as the content generation server 10.

(Content display system configuration)
Below, the outline | summary of the content display system containing the content production | generation server 10 is demonstrated with reference to FIG. FIG. 2 is an explanatory diagram showing a schematic configuration of the content display system when the content generation server 10 is applied.

  The content display system described below includes at least a content generation server 10, a television 30, and a display data server 40 as shown in FIG. The television 30 functions as a content display device that acquires content data from the content generation server 10 and displays the content based on the acquired content data. In this content display system, a PC (personal computer) or a mobile phone may be configured as a content display device instead of the television 30.

(Operation of content display system)
Next, specific operations of each device in the content display system will be described. In the present embodiment, the content display device applied to the content display system is described as the television 30.

  First, a viewer (user) who views the television 30 operates a remote controller or the like to instruct the television 30 to display content. The television 30 transmits a content request to the content generation server 10 based on an instruction from the viewer. The content generation server 10 acquires display data corresponding to the content request transmitted from the television 30 from the display data server 40. Further, the content generation server 10 generates content data to be provided to the television 30 using the display data acquired from the display data server 40, and transmits the generated content data to the television 30 via the network 20. The television 30 displays the content on its own screen based on the content data from the content generation server 10.

  Further, when generating the content data to be provided to the television 30, the content generation server 10 generates a content by synthesizing the layout description (layout description in FIG. 2) indicating the layout of the content and the acquired display data. Yes.

  An example of the layout indicated by the layout description used by the content generation server 10 will be specifically described with reference to FIG. FIG. 3 is an explanatory diagram illustrating an example of a layout indicated by a layout description used by the content generation server 10. The layout 502 will be described as an example. The display data acquired from the display data server 40 by the content generation server 10 is displayed in each of four display areas for displaying the display data indicated by the layout description corresponding to the layout 502. Incorporated. The layout description indicates the layout of the content, in other words, the arrangement of display data on the content.

  As described above, the content generation server 10 generates content data by incorporating display data into each display area of the layout 502.

  Here, since there are various sizes of the screen of the television 30, there is a problem that it is difficult to see the content displayed on the screen of the television 30 if there is only one type of layout description. Specifically, as shown in FIG. 3, a television 30 having a screen size of 30 inches can be provided with a plurality of display areas as a layout description corresponding to the layout 502. However, when the layout description corresponding to the layout 502 is used for a television 30 having a screen size of 10 inches or a portable terminal (such as a mobile phone) having a smaller screen size, each display area on the screen of the television 30 or the portable terminal. Becomes smaller, and the display data displayed in each display area becomes difficult to see. Thus, it is fundamentally impossible to provide content using the same layout description in different screen size areas.

  Therefore, a layout description for each screen size is required in the presence of the television 30 having many screen sizes. Here, as shown in the figure, when the screen size is a portable terminal, the number of display areas is smaller as shown in the layout 507 than the layout 502 which is optimal when the screen size is 30 inches. By using the layout description corresponding to the layout 507, the problem described above can be solved. Furthermore, even if the screen size is the same 30 inches, it is preferable that the content generation server 10 switches the layout description to be used depending on the screen shape of the television 30 such as wide display or normal display.

  Next, the content generation server 10 that generates content data using a layout description corresponding to the screen size of the television 30 will be described.

(Configuration of content generation server 10)
First, the configuration of the content generation server 10 according to the present embodiment will be described below with reference to FIG. FIG. 1 is a block diagram illustrating a configuration of the content generation server 10.

  The content generation server 10 generates a content request in accordance with the content request receiving unit 15 (content display size specifying information acquisition unit) that receives a content request from the television 30 (see FIG. 2) via the network 20. A content generation unit 11, a display data acquisition unit 14 that acquires display data constituting content from the display data server 40, a layout storage unit 13 that stores a plurality of layout descriptions indicating the layout of the content, and a layout storage unit 13 A layout selection unit 12 that selects one layout description from a plurality of layout descriptions to be stored, a rule selection unit 17 that determines a synthesis rule for generating a content by combining the layout description and display data, and a content generation unit 10 Generated content data And a content transmission unit 16 to be transmitted to the television 30 (content data providing means) via Ttowaku 20.

(Operation of Content Generation Server 10)
Below, operation | movement of each block in the content production | generation server 10 which concerns on this embodiment is demonstrated.

  First, a content request transmitted from the television 30 via the network 20 is received by the content request receiving unit 15. Here, the television 30 includes screen size information (for example, 10 inches, 50 inches, etc.) indicating its own screen size in the content request to be transmitted, and transmits the content request to the content request receiving unit 15. The television 30 includes a transmission unit that includes its own screen size information in the content request and transmits the content request to the content generation server 10. Next, the content generation unit 11 acquires a content request from the content request reception unit 15. The content generation unit 11 that has acquired the content request acquires display data corresponding to the content request from the display data acquisition unit 14. Further, the content generation unit 11 outputs screen size information included in the content request to the layout selection unit 12. The layout selection unit 12 selects and reads a layout description corresponding to the input screen size information from a plurality of layout descriptions stored in the layout storage unit 13. The content generation unit 11 inputs the layout description selected by the layout selection unit 12 and synthesizes the input layout description and the display data acquired from the display data acquisition unit 14. Specifically, the content generation unit 11 generates content data by incorporating and synthesizing each acquired display data in each display area of the layout indicated by the input layout description. Next, the content generation unit 11 outputs the generated content data to the content transmission unit 16, and the content transmission unit 16 transmits the content data to the television 30 via the network 20.

  As described above, the layout selection unit 12 may select a layout description based on the screen size information, and supply the selected layout description to the content generation unit 11, or based on the screen size information. A layout description optimized for the screen size of the television 30 may be generated.

  The content generation unit 11 acquires a synthesis rule from the rule selection unit 17 in order to generate the content by combining the display data. Specifically, the content generation unit 11 outputs the screen size information included in the content request to the rule selection unit 17. Furthermore, the rule selection unit 17 selects a synthesis rule corresponding to the input screen size information from a plurality of synthesis rules stored by itself, and outputs the selected synthesis rule to the content generation unit 11. In the above description, the rule selection unit 17 selects a synthesis rule corresponding to the screen size information from a plurality of synthesis rules stored by itself. However, the rule selection unit 17 may be configured to acquire the synthesis rule from the outside.

(Example of layout indicated by layout description)
Next, an example of a layout indicated by a layout description used by the content generation unit 11 to generate content will be described with reference to FIG.

The layouts 504, 502, and 507 shown in the figure correspond to the case where the screen size of the television 30 is 50 inches, the case of 30 inches, and the size for mobile terminals (10 inches or less), respectively. Referring to the layouts 502 and 504, the larger the screen size of the television 30, the greater the number of display areas in the layout.

  Since the layout storage unit 13 stores the layout descriptions corresponding to the layouts 502, 504, and 507 corresponding to the screen size of the television 30 as described above, the content generation server 10 can display the screen size of the television 30. Thus, the content having the optimum layout can be generated, and as a result, the content easy to view for the viewer is provided to the television 30.

  The content generation server 10 may be configured to include a plurality of layout descriptions corresponding to one screen size. A content generation method in the content generation server 10 in this case will be described below with reference to FIG.

  A layout 501 shown in the figure is a layout indicated by a layout description corresponding to both 30-inch and 50-inch screen sizes, and layouts 502 and 503 are layouts indicated by a layout description corresponding to a 30-inch screen size. The layouts 504 and 505 are layouts indicated by the layout description corresponding to the screen size of 50 inches, and the layouts 506 to 509 are the layouts indicated by the layout description corresponding to the screen size for the portable terminal. Furthermore, it is assumed that the layout storage unit 13 stores layout descriptions corresponding to the layouts 501 to 509 described above.

  First, the layout selection unit 12 that has input the screen size information from the content generation unit 11, based on the input screen size information, the layout description corresponding to the layout 502, the layout description corresponding to the layout 504, or the layout corresponding to the layout 507. One of the descriptions is selected and output to the content generation unit 11. Here, it is assumed that the screen size information input by the layout selection unit 12 is that the screen size of the television 30 is 30 inches. Here, when the content generation server 10 receives a signal indicating that the viewer wants to view only one display data from the television 30, the layout selection unit 12 receives the layout corresponding to the layout 501 from the layout storage unit 13. A description is selected and output to the content generation unit 11. As a result, the content generation unit 11 generates content composed of one display data as shown in the layout 501. As a result, the content generation server 10 can generate content configured by one display data and provide it to the television 30 via the network 20. On the other hand, when the content generation server 10 receives a signal from the television 30 indicating that the viewer wants to view more display data than the number of display data shown in the layout 502, the layout selection unit 12 displays the layout storage unit 13 selects a layout description corresponding to the layout 503 and outputs it to the content generation unit 11. Thereby, the content generation server 10 can generate content constituted by more display data and provide it to the television 30 via the network 20.

  As described above, the layout storage unit 13 stores a plurality of layout descriptions corresponding to one screen size, and further receives information on the usage mode of the viewer (switching instruction from the viewer) from the television 30. The television 30 can display contents of a plurality of types of layouts in one screen size. As a result, layout content based on the screen size of the television 30 and the viewer's preference can be provided to the television 30.

  The layout descriptions corresponding to the layouts 501, 504, and 505 corresponding to the screen size of 50 inches and the layout descriptions corresponding to the layouts 506 to 509 shown in FIG. This is the same as switching in the corresponding layout description.

  In addition, a correspondence table between the screen size of the television 30 and viewer's preference and the layout indicated by the layout description selected by the layout selection unit 12 is shown in FIG.

(Select font size)
In the above description, the content generation server 10 that selects an optimal layout description from a plurality of layout descriptions based on the screen size information obtained from the television 30 and provides it to the television 30 has been described. However, the present invention is not limited to this. That is, for example, the content generation server 10 may change the font size in the content provided to the television 30 based on the screen size information obtained from the television 30.

  More specifically, the content generation server 10 sets the font size designation information included in the content provided to the television 30 based on the screen size information obtained from the television 30, for example. Based on the font size designation information included in the content acquired from the content generation server 10, the television 30 determines a font size for displaying the content. Thereby, the television 30 can display content using the font of the size according to the screen size.

  Recently, there is a television 30 having a plurality of tuners for receiving television broadcast radio waves. The content generation server 10 can also generate content having a display area for simultaneously displaying a plurality of television broadcast programs corresponding to such a television 30.

  FIG. 4 shows an example of content configured by a plurality of display areas for displaying a television broadcast program, a display area in which display data composed of text data is incorporated, and a display screen displayed on the television 30. It is explanatory drawing.

  First, the content generation server 10 receives a content request including screen size information from the television 30 via the network 20. Here, the content generation server 10 acquires display data corresponding to the received content request from the display data server 40, and synthesizes the layout description 601 and the acquired display data. Here, the content generation server 10 determines font size designation information based on the screen size information included in the content request. Here, the television broadcast program is not affected by the font size designation by the font size designation information, and the display data composed of text data is designated by the font size designation information.

  In addition, although the example in which the television broadcast program is not affected by the font size designation by the font size designation information is shown here, this is an example, and other than the television broadcast program (for example, an advertisement image or a moving image) The font size designation information may not be affected by the font size designation information. As another example, a television broadcast program may be affected by the font size designation by the font size designation information.

  As a result, the content generation server 10 displays the content 601a when the screen size of the television 30 is 10 types, the content 602a when the screen size is 30 types, and the screen size of 50 types as shown in FIG. Generates content 603a. When the contents 601a to 603a are displayed on the display screen of the television 30, the display screen corresponding to the content 601a is the display screen 601b, the display screen corresponding to the content 602a is the display screen 602b, and the display screen corresponding to the content 603a is The display screen 603b is displayed. As a result, as shown in the figure, the character sizes on the display screens 601b to 603b are substantially the same, and the content generation server 10 can provide content that is optimal for the screen size of the television 30.

  As shown in FIG. 4, each of the contents 601a to 603a includes two display areas for displaying two television broadcast programs (display areas described as “TV” in the figure) and text data. Although the display data is composed of two display areas in which display data is incorporated, the display data incorporated in the display area for displaying a television broadcast program is not limited to the display data of the television broadcast, but is a VOD (Video on Demand). Recording data from a recording device, display data such as video, image, and text data from an external device such as HDR (Hard Disk Recorder) may be used. Further, the display data incorporated in the display area for displaying the TV broadcast program may be acquired by the content generation server 10 from the display data server 40 or received by the TV 30 from the broadcast wave. Alternatively, it may be distributed and acquired by IP communication.

  Note that the content generation server 10 may provide the television 30 with content that stores a bitmap image representing the display screens 601b, 602b, or 603b.

  In the above description, the font size designation information included in the content provided to the television 30 is determined based on the screen size information obtained from the television 30, but the content generation server 10 is not limited to this. Absent. For example, the content generation server 10 may change the character spacing or line spacing of the character string in the content provided to the television 30 based on the screen size information obtained from the television 30.

  In addition, the content generation server 10 is provided with the time and time zone (for example, morning, noon, night, midnight, etc.) when the content request is received from the television 30 and the television 30 instead of the screen size information. A layout description used for content generation may be selected based on regional information (for example, Kansai, Kanto, etc.).

  The content generation server 10 may select a layout description used for content generation based on attribute information such as a viewer's content usage history instead of the screen size information.

  The content generation server 10 obtains information indicating the model and type of the television 30 from the television 30, and selects a layout description used for content generation based on the information indicating the model and type. Also good.

  Further, the content generation server 10 may select a layout description used for content generation based on information of display data constituting the content data. Here, the display data information may be the number of display data constituting the content data or the data size of the display data.

  The layout description selected by the content generation server 10 includes content background designation information for designating the background of the content displayed on the television 30. The content generation server 10 displays the display data constituting the content data. The content background designation information may be determined based on the hue.

  Further, the content generation server 10 may select an image display form based on the screen size information. That is, the vertical and horizontal sizes of images and the number of images per screen may be selected.

  In addition, when the content display system is a system that distributes different content from the content generation server 10 to the television 30 every day, the content generation server 10 assumes that the content changes from day to day, and dynamically describes the layout description. The order may be changed and distributed.

(Additional notes)
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  Finally, each block of the content generation server 10 may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the content generation server 10 includes a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random access memory) that expands the program. And a storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is to provide a recording medium on which a program code (execution format program, intermediate code program, source program) of a control program of the content generation server 10 which is software for realizing the above-described functions is recorded so as to be readable by a computer This can also be achieved by supplying the content generation server 10 and reading and executing the program code recorded on the recording medium by the computer (or CPU or MPU).

  Examples of the recording medium include tapes such as magnetic tapes and cassette tapes, magnetic disks such as floppy (registered trademark) disks / hard disks, and disks including optical disks such as CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the content generation server 10 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication. A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention can be applied to a content data providing device that provides content data to a plurality of content display devices having different screen sizes. For example, in order to display broadcast or distributed content and character information at the same time, The present invention can be suitably applied to a content data providing apparatus that provides the content data.

It is a block diagram which shows the structure of the content generation server based on embodiment of this invention. It is explanatory drawing which shows the structure of the content display system based on embodiment of this invention. It is explanatory drawing which shows an example of the layout description corresponding to image size based on embodiment of this invention. It is explanatory drawing which shows an example of the content and display screen which changed the font size of the display data based on the screen size based on embodiment of this invention. It is explanatory drawing which shows an example of the content at the time of similar reduction | decrease and enlargement of the display data in a prior art example.

Explanation of symbols

10 Content generation server (content data providing device)
11 content generation unit 12 layout selection unit (layout selection means)
13 Layout storage unit 14 Display data acquisition unit 15 Content request reception unit (screen size information acquisition unit)
16 Content transmission unit (content data providing means)
17 Rule selector 30 TV

Claims (3)

Content display size specification information acquisition means for acquiring content display size specification information capable of specifying the content display size of the content display device;
Layout selecting means for selecting a content layout based on the content display size specifying information;
Content data providing means for providing the content display device with content data for displaying the content in the selected layout,
Content data providing apparatus characterized by the above.   2. The content data providing apparatus according to claim 1, wherein the content display size specifying information includes screen size information indicating a screen size of the content display apparatus. A content display device that displays content using content data acquired from a content data providing device,
Content display size specifying information providing means for providing content display size specifying information capable of specifying the content display size for displaying the content to the content data providing device is provided.
A content display device characterized by that.

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