JP5361526B2 - Video display device and control method thereof - Google Patents

Description

  The present invention relates to a video display device and a control method thereof that make it possible to display a partial area with high visibility when a plurality of partial areas are selectively displayed from an image of the entire area.

In recent years, high definition images such as broadcasts and optical discs have been developed from SD (Standard Definition) video with a resolution of 720 × 480 to HD (High Definition) video with a resolution of 1920 × 1080. Furthermore, in the next-generation advanced BS digital broadcasting, an ultra-high-definition video with a resolution of 7680x4320 has been proposed. Along with the high definition of video, there is a method for cutting out and displaying a video of a partial area (hereinafter referred to as “partial area”) from the entire area of the high definition video (hereinafter referred to as “total area”). Proposed. For example, a method has been studied in which a notable partial area of a high-definition video is multiplexed on the video as meta information, and can be displayed even on a video display device having a small display area such as a portable terminal.
On the other hand, in the conventional channel selection technique, there is a technique in which a broadcast station visualizes and broadcasts a list of broadcast channels, and a user selects a desired channel from the list of videos (see, for example, Patent Document 1). .
In addition, as a conventional technique for displaying a partial area of an image, there is an auto framing process technique for changing a cut-off angle of view according to the number of face detections and a shooting distance in a camera capable of live view display (for example, patents). Reference 2). The live view is a function of using and photographing the back image confirmation liquid crystal monitor as a viewfinder in a digital single-lens reflex camera.

Japanese Unexamined Patent Publication No. 07-184184 JP 2008-252711 A

However, when selecting and enlarging and displaying one of a plurality of partial areas of a high-definition video described in meta information, the selection method based on list video using the channel selection technique described in Patent Document 1 The positional relationship between the regions is unknown. In addition, transmitting a plurality of partial area images to a transmission line having a limited transmission capacity has a problem that the band of the transmission line is compressed.
On the other hand, the technique of auto framing processing described in Patent Document 2 has a problem that a partial area to be cut out and selected is displayed small.
Therefore, in the present invention, when a partial area is cut out from the entire area of the high-definition video and selectively displayed, the area is changed to an area that includes a plurality of partial areas and is a part of the entire area (hereinafter referred to as “unit area”). An object of the present invention is to provide a video display device and a control method thereof.

The video display device according to the present invention includes an extraction means for extracting information on the entire area and partial area of the video included in the metadata multiplexed in the digital television broadcast signal, and is extracted when the user selects the display area. And control means for deriving a display area to be displayed on the screen of the video display device from information on the entire area and partial area, and display means for displaying the derived display area.

  According to the present invention, when a partial area synchronized with the video is selectively displayed on the video display device from the video of the entire area being broadcast, the unit area including a plurality of partial areas is displayed, The positional relationship is easy to understand. Further, since the partial area is displayed in a large size, the user can easily determine the content of the video of the partial area to be selected.

It is a block diagram which shows the structural example of the video display apparatus which concerns on Embodiment 1 of this invention. It is the figure which showed the structure of the component descriptor which concerns on Embodiment 1 of this invention. It is an example of the image | video of the whole area | region which concerns on Embodiment 1 of this invention. It is an example of a picture of a partial field concerning Embodiment 1 of the present invention. It is an information table defined by component_type which concerns on Embodiment 1 of this invention. It is the flowchart figure which showed the control method which concerns on Embodiment 1 of this invention. It is an example of the area | region of the whole area | region, partial area | region, and unit area | region which concerns on Embodiment 1 of this invention. It is the example which displayed the unit area which concerns on Embodiment 1 of this invention on a display part. It is the flowchart figure which showed the control method which concerns on Embodiment 2 of this invention. It is an example of the image | video of the whole area | region and partial area | region which concerns on Embodiment 2 of this invention. It is an example of a picture of a whole field, a partial field, and a unit field concerning Embodiment 2 of the present invention. It is the example of a video of a whole field, a partial field, a unit field, and a multi picture concerning Embodiment 2 of the present invention. It is the flowchart figure which showed the control method which concerns on Embodiment 3 of this invention. It is an example of the area | region of the whole area | region, partial area | region, and unit area which concerns on Embodiment 3 of this invention. It is an example of the image | video of the multiscreen which concerns on Embodiment 3 of this invention. It is an example of the image | video of the whole area | region and partial area | region which concerns on Embodiment 3 of this invention. It is an example of the image | video of the multiscreen which concerns on Embodiment 3 of this invention.

<Embodiment 1>
A first embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a block diagram showing a configuration of a video display apparatus according to the first embodiment of the present invention. In the present embodiment, it is assumed that an advanced BS digital broadcast program is received from an antenna as an example of a high-definition input video.
The antenna 101 receives a plurality of digital television broadcast signals in which video data, audio data, metadata, and the like are multiplexed and digitally modulated.
For example, the information acquisition unit 102 selects a broadcast program selected by the user from the digital television broadcast signal in accordance with an instruction from the control unit 108 that has received a channel selection instruction from the user. Then, the information acquisition unit 102 performs demodulation of the broadcast signal, error correction processing, and the like, and outputs an MPEG2-TS (Transport Stream) signal.
The signal separation unit 103 separates the video data and metadata from the multiplexed MPEG2-TS signal based on the broadcast program packet ID selected by the user, and sends them to the video reproduction unit 104 and the metadata processing unit 105, respectively. Output. The multiplexed MPEG2-TS signal may include audio data and data broadcast (multimedia) data, but these processing units are not shown in FIG.
The video playback unit 104 decodes video data encoded by ITU-T Rec. H.264 / ISO / IEC 14496-10 MPEG-4 Part 10 Advanced Video Coding formulated and standardized by JVT (Joint Video Team). And output to the area cutout unit 106.
The metadata processing unit 105 extracts information for filtering the MPEG2-TS signal and information on the entire area and the partial area according to the present invention from the component type (component_type) in the PSI / SI table. PSI / SI (Program Specific Information / Specific Information) is program specific information and program information defined by STD-B10 of ARIB (Association of Radio Industries and Businesses). The PSI / SI is composed of a plurality of tables, and the metadata processing unit 105 extracts the above-described information from the component type of the component descriptor in the EIT (Event Information Table) / PMT (Program Map Table).

FIG. 2 is a diagram illustrating a structure of a component descriptor (component_descriptor). The component descriptor defines a component type (component_type) such as video, audio, and data. In the component type, resolution information of the video of the entire area is defined in an 8-bit field (for example, 480i video when the component type is 0x01, 1080i video when the component type is 0xB1, etc.). In this descriptor, for example, as shown in FIG. 5, a definition of 4320p resolution in the case of 0xF3 and a partial area information in a program of 4320p resolution in the case of 0xF2 are defined. The control unit 108 of the video display device can determine whether the program has partial area information from the component descriptor.
When partial area information is included, the area information can be defined in the component description (text_char) of the component descriptor. For example, the area information is represented by an area surrounded by coordinates (XL_1, YL_1) and (XR_1, YR_1), and each coordinate is a continuous description defined by 2 bytes as will be described later.
FIG. 3 shows an example of an image of the entire area, and FIGS. 4A and 4B show an image of a partial area that is a part of FIG. Using the above description method, the partial region in FIG. 4A can be expressed by XL_1 = 1921, YL_1 = 2161, XR_1 = 3840, YR_1 = 3240. Then, XL_1 = 0x0781, YL_1 = 0x0871, XR_1 = 0x0F00, and YR_1 = 0x0CA8 obtained by hexadecimal conversion of these are consecutively described, and a partial region can be defined by describing text_char = 078108710F000CA8. Similarly, the partial area in FIG. 4B can be defined as text_char = 0FC103CD17400804. The video display device can display the video of the partial area based on the value of text_char.

The description returns to FIG. 1 again.
The area cutout unit 106 cuts out the unit area output from the video reproduction unit 104 in accordance with an instruction from the control unit 108, displays a frame around the selectable partial area, and converts it to the resolution of the display unit 10 7.
The display unit 107 displays the unit area cut out by the area cutout unit 106 and converted in resolution. The display unit 107 has an HD resolution of 1920 × 1080, and the area information can be represented by an area surrounded by coordinates (1,1) and (1920,1080).

Hereinafter, the operation of the control unit 108 will be described in detail with reference to the flowchart of FIG. 6 and the region diagrams of FIGS. 7 and 8.
The area diagram of FIG. 7 is composed of four areas: an entire area, a partial area 1, a partial area 2, and a unit area.
Each area information is represented by an area surrounded by the following coordinates.
Entire area: Coordinates (XL, YL) and (XR, YR)
Partial area 1 ... coordinates (XL_1, YL_1) and (XR_1, YR_1)
Partial area 2 ... Coordinates (XL_2, YL_2) and (XR_2, YR_2)
Unit area ... coordinate (XL_0, YL_0) and (XR_0, YR_0)

Each step in FIG. 6 starts when the user selects a display area, that is, when the user selects an area to be displayed on the display unit 107 from the partial area information extracted by the metadata processing unit 105.
In step S702, the control unit 108 receives from the metadata processing unit 105 all partial area information synchronized with the video being broadcast.
In step S703, the control unit 108 derives coordinates (XL_0, YL_0) and (XR_0, YR_0) as region information of unit regions in which a plurality of partial regions can be viewed. When the number of partial areas is n, XL_0 = XL_n (min) can be derived by selecting the minimum value XL_n (min) from XL_n (n = 1, 2,...). Similarly, YL_0 = YL_n (min), XR_0 = XR_n (max), YR_0) = YR_n (max). In the region diagram of FIG. 7, n = 2, XL_1 <XL_2, YL_1 <YL_2, XR_1 <XR_2, YR_1 <YR_2, and the coordinates (XL_0, YL_0) = (XL_1, YL_1) and (XR_0, YR_0) of the unit region ) = (XR_2, YR_2) can be derived.
In step S704, the control unit 108 transmits the region information of the unit region to the region cutout unit 106. In the case of the area diagram of FIG. 7, the coordinates (XL_0, YL_0) and (XR_0, YR_0), that is, the coordinates (XL_1, YL_1) and (XR_2, YR_2) are transmitted to the area cutout unit 106.

In step S705, the control unit 108 instructs the region cutout unit 106 to display different color frames around the partial region based on the partial region information included in the unit region.
FIG. 8 shows an example in which the unit area (a part of the entire area shown in FIG. 3 and including the partial areas shown in FIGS. 4A and 4B) is displayed on the display unit 107 according to the present embodiment. A red frame and a blue frame are displayed around the partial area, respectively.

In step S706, the control unit 108 recognizes the partial area selected by the user. For example, the user selects a partial area (partial area shown in FIG. 4A) surrounded by a red frame in FIG. 8 by pressing a red button on the remote controller. Alternatively, the user can select a partial area using the cross key of the remote controller.
In step S707, the control unit 108 instructs the region cutout unit 106 to cut out the partial region selected by the user on the display unit 107. For example, the control unit 108 transmits the coordinates (1921, 2161) and (3840, 3240), which are the partial region information in FIG. As a result, the partial area selected by the user is converted in resolution on the display unit 107 and displayed on the entire screen.

  As described above, according to the present embodiment, when a partial area synchronized with the video is selectively displayed on the video display device from the video of the entire area being broadcast, the partial area is displayed by displaying the unit area including a plurality of partial areas. It becomes easy to understand the positional relationship between each other. Further, since the partial area is displayed in a large size, the user can easily determine the content of the video of the partial area to be selected.

<Embodiment 2>
A second embodiment of the present invention will be described with reference to the flowchart of FIG. 9 and the region diagram of FIG.
This embodiment changes the display area / method when the user selects a display area and the partial area selected by the user is displayed small in the entire area or unit area video displayed on the video display device. It is.
The configuration example of the video display device in the present embodiment is basically the same as that of the first embodiment (FIG. 1), and only the operation of the control unit 108 is different. In the region diagram of FIG. 7, the areas of the entire region, the partial region 1, the partial region 2, and the unit region are represented by S, S ₁ , S ₂ , and S ₀ . Further, in the present embodiment, threshold values C ₁ and C ₂ are newly defined as values used for determination when changing the display area described later.

Hereinafter, the operation of the control unit 108 in the present embodiment will be described in detail.
Each step of FIG. 9 is started when the user selects a display area.
In step S1002, the control unit 108 sets threshold values C ₁ and C ₂ . The threshold value may be specified on the user side or may be specified on the broadcast station side and transmitted on the broadcast signal. In this embodiment, as an example, C ₁ = 1/4 and C ₂ = 1/8.
In step S1003, the derived total region area S, the partial region area S ₁ and S _2.
In the case of the area diagram of FIG.
Total area S = (XR-XL) * (YR-YL)
Partial region area S ₁ = (XR_1-XL_1) * (YR_1-YL_1)
Partial area S ₂ = (XR_2-XL_2) * (YR_2-YL_2)

In step S1004, the control unit 108, the entire region area S and all of the partial region area S _1, S _2, total ··· ΣSn (n = 1,2, ··· ) to calculate the ratio ShigumaSn / S of , it compares the magnitude of the threshold C _1.
If ΣSn / S> = C _{1 as} a result of the comparison, it is determined that the visibility of the partial area is good even when the entire area is displayed, and the process proceeds to step S1005.
In step S1005, the control unit 108 instructs the region cutout unit 106 to cut out the entire region and display it on the display unit 107. Specifically, the control unit 108 sends coordinates (XL, YL) and (XR, YR), which are region information of the entire region, to the region cutout unit 106.

On the other hand, if ΣSn / S <C _{1 as} a result of the comparison, it is determined that the visibility of the partial area is not good in the display of the entire area, and the process proceeds to step S1006.
In step S1006, the control unit 108 calculates the unit region area S ₀ of the unit area where visibility is improved partial than entire area region. From coordinates (XL_0, YL_0) = (XL_1, YL_1), (XR_0, YR_0) = (XR_2, YR_2), which are region information of the unit region calculated in step S703 of the first embodiment, S ₀ = (XR_2− XL_1) * (YR_2-YL_1).

In step S1007, the control unit 108 sets the ratio ΣSn / S ₀ of the sum ΣSn (n = 1, 2,...) Of the unit region area S ₀ and all the partial region areas S ₁ , S _2. calculated, it compares the magnitude of the threshold C _2.
If ΣSn / S ₀ > = C _{2 as} a result of the comparison, it is determined that the visibility of the partial area is good in the display of the unit area, and the process proceeds to step S1008.
In step S1008, the control unit 108 instructs the region cutout unit 106 to cut out the unit region and display it on the display unit 107. Specifically, the control unit 108 sends coordinates (XL_1, YL_1) and (XR_2, YR_2), which are region information of the unit region, to the region cutout unit 106.

On the other hand, if ΣSn / S ₀ <C ₂ , it is determined that the visibility of the partial area is not good even in the unit area display, and the process proceeds to step S1009.
In step S1009, the control unit 108 calculates the barycentric positions of all the partial areas and calculates positional relationship information between the partial areas. Then, the control unit 108 instructs the region cutout unit 106 to display the multi screen on the display unit 107. Specifically, the control unit 108 sends the calculated positional relationship information and the region information of each partial region to the region cutout unit 106.
In the case of the area diagram of FIG. 7, if the centroids of the partial area 1 and the partial area 2 are expressed by coordinates (X1, Y1) and (X2, Y2), respectively, they can be calculated as follows.
Center of gravity of partial area 1 (X1, Y1) = ((XR_1 + XL_1) / 2, (YR_1 + YL_1) / 2)
Center of gravity of partial area 2 (X2, Y2) = ((XR_2 + XL_2) / 2, (YR_2 + YL_2) / 2)
Here, for example, if XR_1 <XL_2 and YR_1 <YL_2, the positional relationship is X1 <X2 and Y1 <Y2.

The above operation will be specifically described with reference to FIGS. 10 to 12 (case 1 to case 3). In each figure, the areas of the entire region, partial region A, partial region B, and unit region are S, S _A , S _{B, and} S ₀ , respectively.
[Case 1]
FIG. 10 shows an example in the case of (S _A + S _B ) / S> C ₁ (step S1004), that is, when the visibility of the partial area is good in the display of the entire area.
When the user selects a display area, the process of step S1005 is performed, and the entire area of FIG.
[Case 2]
FIG. 11A shows the case of (S _A + S _B ) / S <C ₁ (step S1004), (S _A + S _B ) / S ₀ > C ₂ (step S1007), that is, the display of the entire area. In this example, the visibility of the partial area is not good, but the visibility of the partial area is good in the display of the unit area.
When the user selects a display area, the process of step S1006 is performed, and the unit area of FIG. 11B is derived. In step S1007, the process of step S1008 is performed from (S _A + S _B ) / S ₀ > C ₂ , and the unit area shown in FIG.
[Case 3]
FIG. 12A shows the case of (S _A + S _B ) / S <C ₁ (step S1004), (S _A + S _B ) / S ₀ <C ₂ (step S1007), that is, the display of the entire area. However, this is an example when the visibility of the partial area is not good even in the display of the unit area.
When the user selects a display area, the process of step S1006 is performed, and the unit area of FIG. 12B is derived. In step S1007, the process of step S1009 is performed from (S _A + S _B ) / S ₀ <C ₂ , and the multi-screen of FIG.

  As described above, according to the present embodiment, when the partial area is selectively displayed on the video display device, the display area / method is changed according to the visibility, and thus the user determines the content of the video of the partial area to be selected. Becomes easier. In addition, in the case of display of unit areas, as well as in the case of multi-screen display, it is displayed while maintaining the positional relationship between the partial areas, so that the positional relationship between the partial areas can be easily grasped.

Note that in step S1007 of this embodiment, the total in order to determine whether to change the display area, the method, the unit region area S ₀ all partial region area Sn (n = 1,2, ···) The ratio ΣSn / S ₀ was calculated and compared with the threshold value C ₂ . However, a new threshold C ₃ is separately defined, and by comparing the size of each partial area Sn (n = 1, 2,...) With C ₃ , the display of the unit area can be further improved. It is also possible to determine whether the display is small and to make a multi-screen display.

<Embodiment 3>
A third embodiment of the present invention will be described with reference to the flowchart of FIG. 13 and the area diagram of FIG.
In this embodiment, when a user selects a display area, if each partial area is displayed small in an image of a unit area including all partial areas, the partial areas are configured with partial areas having high proximity, The area is displayed in a large size.
The configuration example of the video display device in the present embodiment is basically the same as that of the first embodiment (FIG. 1), and only the operation of the control unit 108 is different.
The area diagram of FIG. 14 is composed of five areas: an entire area, a partial area 1, a partial area 2, a partial area 3, and a unit area.
Each area information is represented by an area surrounded by the following coordinates, and the center of gravity of the partial area and the unit area is represented as follows.
Entire area: Coordinates (XL, YL) and (XR, YR)
Partial area 1 ... Coordinates (XL_1, YL_1) and (XR_1, YR_1), center of gravity (X1, Y1)
Partial area 2 ... Coordinates (XL_2, YL_2) and (XR_2, YR_2), center of gravity (X2, Y2)
Partial area 3 ・ ・ Coordinates (XL_3, YL_3) and (XR_3, YR_3), center of gravity (X3, Y3)
Unit area: coordinates (XL_0, YL_0) and (XR_0, YR_0), center of gravity (X0, Y0)
Further, XL_2 <XL_3, YL_2 <YL_3, XR_2 <XR_3, and YR_2 <YR_3. Further, in this embodiment, define a new threshold C ₄ as the value used for the determination of the proximity between the partial regions each other later.

Hereinafter, the operation of the control unit 108 in the present embodiment will be described in detail.
Each step of FIG. 13 is started when the user selects a display area.
In step S1702, the control unit 108 derives the distance between the partial regions, specifically, the distance between the centroids. For example, the distance L12 between the partial region 1 and the partial region 2 can be derived as L12 = √ ((X2-X1) ^ 2 + (Y2-Y1) ^ 2). Similarly, a distance L13 between the partial region 1 and the partial region 3 and a distance L23 between the partial region 2 and the partial region 3 are derived.

In step S1703, the control unit 108 determines whether or not the partial areas are separated from each other, and derives a unit area including a partial area with a high degree of proximity excluding the separated partial areas. Specifically, the control unit 108, the distance L12, L13, L23 between the partial areas mutually derived in step S1702 is compared with a threshold value C _4, C ₄ or less high proximity if, apart portions between regions Judge that it is not. For example, when L12 <L23 <C ₄ <L13, it can be determined that the partial region 3 exceeding C ₄ is separated from the group of the partial region 1 and the partial region 2. Therefore, the control unit 108 derives a unit area including the partial area 1 and the partial area 2.

  In step S1704, the control unit 108 instructs the region cutout unit 106 to perform multi-screen display based on the unit region derived in step S1703 and the region information of the partial region determined to be separated from the unit region. Specifically, the control unit 108 includes region information (X0, Y0) of the unit region, that is, coordinates (XL_1, YL_1) and (XR_2, YR_2), and coordinates (XL_3, YL_3) and (XR_3, YR_3) are sent to the region cutout unit 106.

  When the multi-screen display is performed, the control unit 108 sends the positional relationship information between the unit regions and the partial regions to the region clipping unit 106, and instructs the multi-screen display while maintaining the positional relationship between the unit regions and the partial regions. it can. For example, the centroid (X0, Y0) of the unit area is calculated from the centroid (X1, Y1) of the partial area 1 and the centroid (X2, Y2) of the partial area 2 by ((X1 + X2) / 2, (Y1 + Y2) / 2). The center of gravity of the partial region 3 is (X3, Y3), and X0 <X3 and Y0 <Y3. Therefore, the positional relationship between the unit region and the partial region 3 can be derived.

  In step S1705, the control unit 108 determines whether the number of areas (unit area or partial area) displayed on the multi-screen is larger than the maximum number of multi-screens that can be displayed simultaneously (for example, 4). In this embodiment, the number of areas displayed on the multi-screen is 2 of the unit area including the partial area 1 and the partial area 2 and the partial area 3. Therefore, when the maximum number of multi-screens is 4, the processing of the control unit 108 is as follows. The process ends (step S1707). A multi-screen as shown in FIG. 15 is displayed on the display unit 107.

In step S1706, when the number of areas displayed on the multi-screen is larger than the maximum number of multi-screens, the control unit 108 instructs the area cutout unit 106 to display a plurality of multi-screens.
For example, when the maximum number of multi-screens is 4 and 8 partial areas or partial areas are displayed on a multi-screen, the control unit 108 instructs the area cut-out unit 106 to display multi-screens for every four areas. As a result, two multi-screens having four areas are prepared on the display unit 107. When the user selects an area, control can be performed so that a desired area can be selected from the next multi-screen.

  As described above, according to the present embodiment, when a partial area is selectively displayed on the video display device, the partial area is displayed in a larger size by selecting the partial areas constituting the unit area according to the distance between the partial areas. be able to. Thereby, the user can easily determine the content of the video of the partial area to be selected. In addition, since the multi-screen display is performed while maintaining the positional relationship between the partial areas, it is easy to grasp the positional relationship between the partial areas.

In the present embodiment, in step S1703, only one partial area (partial area 3) is separated from the other partial areas (partial area 1 and partial area 2).
However, when there is a further partial region 4 close to the partial region 3 as shown in FIG. 16, it is divided into a group of the partial region 1 and the partial region 2 and a group of the partial region 3 and the partial region 4 in step S1703. Can be judged. The unit region 1 and the unit region 2 can be derived for each group. Therefore, in this case, the control unit 108 can instruct the area cutout unit 106 to display a multi-screen including the unit area 1 and the unit area 2 in step S1704. As a result, a multi-screen as shown in FIG. 17 is displayed on the display unit 107.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 100 Antenna 102 Information acquisition part 103 Signal separation part 104 Image | video reproduction | regeneration part 105 Metadata processing part 106 Area extraction part 107 Display part 108 Control part

Claims (18)

Extraction means for extracting information on the entire area and partial area of the video included in the metadata multiplexed in the digital television broadcast signal;
Control means for deriving a display area to be displayed on the screen of the video display device from the information of the extracted whole area and partial area when the user selects a display area;
Display means for displaying the derived display area;
A video display device comprising:   The video display apparatus according to claim 1, wherein the control unit derives the entire area as the display area.   The control means uses, as a criterion for deriving the entire area as the display area, that a ratio of a total area of all the partial areas to an area of the entire area is a predetermined threshold or more. The video display device according to claim 2.   The video display device according to claim 1, wherein the control unit derives a unit area including a plurality of the partial areas as the display area.   The control means has a ratio of the total area of all the partial areas to the area of the entire area that is less than a predetermined threshold, and the total area of all the partial areas and the area of the unit area The video display device according to claim 4, wherein a ratio is equal to or greater than a predetermined threshold value is used as a criterion for deriving the unit area as the display area.   The video display apparatus according to claim 1, wherein the control unit instructs the display unit to display each of the partial areas on a multi-screen. The control means includes a ratio of a total area of all the partial areas to an area of the entire area that is less than a predetermined threshold, and includes a total area of all the partial areas and a plurality of the partial areas. The ratio of the area of the unit area is less than a predetermined threshold value, which is used as a criterion for instructing the display means to display each of the partial areas on a multi-screen. Video display device. The control means derives a distance between the partial areas, and instructs the display means to display a multi-screen including unit areas including a plurality of partial areas between partial areas with high proximity. The video display device according to claim 6, wherein the video display device is characterized.   The video display apparatus according to claim 6, wherein the control unit instructs the display unit to perform multi-screen display while maintaining a positional relationship between the partial areas. An extraction process for extracting information on the entire area and partial area of the video included in the metadata multiplexed on the digital television broadcast signal;
A control step of deriving a display area to be displayed on the screen of the video display device from the information of the extracted whole area and partial area when the user selects a display area;
A display step of displaying the derived display area by a display means;
A control method for a video display device, comprising:   The method according to claim 10, wherein in the control step, the entire area is derived as the display area.   In the control step, a determination criterion for deriving the entire area as the display area is that a ratio of a total area of all the partial areas to an area of the entire area is a predetermined threshold or more. The method for controlling a video display device according to claim 11.   The method for controlling a video display device according to claim 10, wherein in the control step, a unit area including a plurality of partial areas is derived as the display area.   In the control step, the ratio of the total area of all the partial areas to the area of the whole area is less than a predetermined threshold, and the total area of all the partial areas and the area of the unit area 14. The video display device control method according to claim 13, wherein a ratio is equal to or greater than a predetermined threshold value is used as a criterion for deriving the unit area as the display area.   11. The method of controlling a video display device according to claim 10, wherein in the control step, the display unit is instructed to display each of the partial areas on a multi-screen. In the control step, the ratio of the total area of all the partial areas to the area of the entire area is less than a predetermined threshold, and includes the total area of all the partial areas and a plurality of the partial areas. The ratio of the area of the unit area is less than a predetermined threshold value, which is used as a criterion for instructing the display means to display each of the partial areas on a multi-screen. Control method of video display device. In the control step, the distance between the partial areas is derived, and the display means is instructed to display a multi-screen including unit areas including a plurality of partial areas between partial areas with high proximity. The method for controlling a video display device according to claim 15, wherein the video display device is controlled.   18. The video display device according to claim 15, wherein, in the control step, the display unit is instructed to perform a multi-screen display while maintaining a positional relationship between the partial areas. Control method.

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