JP5875477B2 - Image processing apparatus and image display method on odd-size screen - Google Patents

Description

  The present invention relates to a video processing apparatus and a video display method on a special size screen, and more particularly to a video processing apparatus and a video display method having a function of displaying a video of a predetermined size having a predetermined aspect ratio on a special size screen. It is.

  Conventionally, in a navigation apparatus, as a mode for displaying video of an AV source, a full screen display mode in which video is displayed on a full screen with a predetermined aspect ratio as shown in FIG. 4A, FIG. As shown in (d), a two-screen display mode in which a video is displayed together with a map image or the like by being divided into two screens is prepared. In the two-screen display mode, a video is displayed in a video display area (one of the two screens) that has a different size compared to the size of the entire screen.

  The two-screen display mode is a just display mode (FIG. 4 (b)) that is sized so that the entire range of the original image just fits in the image display area, and left and right to improve that the image becomes vertically long when the just display is performed. There is a fixed value display mode (FIG. 4C) for enlarging the original image in the direction, and an aspect ratio priority display mode (FIG. 4D) for reducing and displaying the original image so as to maintain the aspect ratio of the original image. .

  However, in the just display mode, there is a problem that the video displayed in the video display area is in a vertically stretched state and is difficult to see. In the fixed value display mode, since the video is enlarged in the left-right direction, a part of the left-right area of the original video is missing. Therefore, when subtitles are displayed on the video, there is a problem that the left and right end portions of the subtitles may be cut off and become invisible. In addition, in the aspect ratio priority display mode, there is a problem that the video is reduced as a whole, so that the video becomes small and difficult to see.

  A technique has been proposed in which the position and size of a subtitle are controlled so as not to overlap with the child screen when the subtitle is moved and displayed on the portion displayed on the parent / child screen (see, for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 9-214847

  The present invention has been made in order to solve the above-described problem when displaying an image on a variant size screen in the two-screen display mode, and improves the visibility of the image displayed on the variant size screen. The purpose is to be able to.

  In order to solve the above-described problems, in the present invention, when displaying a video on a different size screen different from the predetermined size screen, the variant is based on the width of the subtitle displayed along with the video and the width of the variant size screen. An enlargement / reduction rate is obtained such that the width of the size screen matches the width of the caption, and the video is enlarged or reduced in the width direction according to the enlargement / reduction rate.

  According to the present invention configured as described above, the caption displayed together with the video is the largest in the atypical size screen and is displayed without interruption. Also, unless the width of the irregular size screen is considerably smaller than the width of the caption, the image will not be greatly reduced in the width direction, preventing the image displayed on the irregular size screen from being stretched vertically. can do. Furthermore, since the video is not reduced as a whole, it is possible to prevent the video displayed on the variant size screen from becoming too small. Thereby, for example, when displaying a video on an irregular size screen in the two-screen display mode, the visibility of the video can be improved as compared with the conventional case.

It is a block diagram which shows the structural example of the vehicle-mounted system provided with the video processing apparatus by this embodiment. It is a figure which shows the example of a display screen of this embodiment. It is a flowchart which shows the operation example of the video processing apparatus by this embodiment. It is a figure which shows the example of a screen display in various display modes.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram illustrating a configuration example of an in-vehicle system including a video processing device 10 according to the present embodiment. FIG. 2 is a diagram illustrating an example of a display screen according to the present embodiment. As shown in FIG. 1, the in-vehicle system of this embodiment includes a navigation device 20, a digital broadcast receiving device 30, and a display 40 in addition to the video processing device 10.

  The navigation device 20 detects the current position of the vehicle using a self-contained navigation sensor, a GPS (Global Positioning System) receiver, or the like. Then, map data in the vicinity of the current position is read from the recording medium, a map image is generated, and output to the video processing apparatus 10.

  The digital broadcast receiver 30 receives digital broadcast radio waves and performs demodulation processing, error correction processing, transport stream separation processing, decoding processing, and the like. Thereby, video information, audio information, caption information, control information, and the like of the digital broadcast are generated, and other information excluding the audio information is output to the video processing device 10. Note that the sound information is output to a sound processing device (not shown). Here, the control information includes subtitle display position information.

  The video processing device 10 performs control for displaying the map image supplied from the navigation device 20 and the video information and caption information supplied from the digital broadcast receiving device 30 on the display 40. As a functional configuration for that purpose, the video processing apparatus 10 includes a display control unit 1, an operation reception unit 2, a system memory 3, a display size determination unit 4, a caption width detection unit 5, and an enlargement / reduction unit 6.

  Note that the functions of the display control unit 1, the operation receiving unit 2, the display size determination unit 4, the caption width detection unit 5, and the enlargement / reduction unit 6 are actually configured by including a computer CPU or MPU, RAM, ROM, and the like. It can be realized by operating a program stored in the RAM or ROM.

  The display control unit 1 controls display of map images supplied from the navigation device 20, video information supplied from the digital broadcast receiving device 30, and caption information on the display 40. For example, the display control unit 1 executes display control described below according to either the full screen display mode or the two screen display mode.

  In the full screen display mode, the display control unit 1 sends map image or video information (further caption information when the caption display function is set to ON) to the display 40 with a predetermined aspect ratio (for example, 16: 9). Display full screen. This full screen corresponds to a “predetermined size screen” in the claims. In the following, video information and subtitle information when subtitle display is set are collectively referred to as broadcast video.

  In the two-screen display mode, the display control unit 1 divides the display 40 into two screens and displays a map image and a broadcast video on each screen (one is a map image display area and the other is a broadcast video display area). . The broadcast video display area in this case corresponds to the “atypical size screen” in the claims.

  The operation reception unit 2 receives various operations on an operation unit (not shown). The operation unit may be a touch panel provided on the display 40 or a remote control. For example, the operation reception unit 2 receives an operation for setting the display mode to either the full-screen display mode or the two-screen display mode. The system memory 3 stores display mode setting information received by the operation receiving unit 2.

  Based on the display mode setting information stored in the system memory 3, the display control unit 1 described above performs display control on the display 40 of the map image and the broadcast video according to either the full screen display mode or the two screen display mode. Execute.

  Based on the display mode setting information stored in the system memory 3, the display size determination unit 4 determines whether or not to display the broadcast video on a different size screen (broadcast video display area) different from the predetermined size screen (full screen). That is, it is determined whether or not the two-screen display mode is set.

  When the display size determination unit 4 determines that the broadcast video is to be displayed on the atypical size screen, the caption width detection unit 5 controls information supplied from the digital broadcast receiver 30 (specifically, display position information of the caption). The width of the caption displayed together with the video information of the broadcast video is detected based on the above. That is, as shown in FIG. 2A, the width W1 from the left end to the right end of the caption information is detected.

  The enlargement / reduction unit 6 obtains an enlargement / reduction rate such that the caption width matches the width of the broadcast video display area based on the width of the caption detected by the caption width detection unit 5 and the width of the broadcast video display area. . Then, according to the enlargement / reduction ratio, the broadcast video supplied from the digital broadcast receiver 30 is enlarged or reduced in the width direction, and the enlarged / reduced broadcast video is output to the display control unit 1.

  For example, as shown in FIG. 2B, when the horizontal width W2 of the broadcast video display area is larger than the horizontal width W1 of the subtitle detected by the subtitle width detection unit 5, the enlargement / reduction unit 6 uses W2 / W1. The broadcast video is expanded in the width direction at an enlargement ratio of. On the other hand, when the horizontal width W2 of the broadcast video display area is smaller than the horizontal width W1 of the subtitle detected by the subtitle width detection unit 5, the enlargement / reduction unit 6 displays the broadcast video in the width direction at a reduction ratio of W2 / W1. Reduce. The enlargement / reduction unit 6 does not enlarge or reduce the broadcast video in the height direction. This is because in the present embodiment, since the horizontal two-screen display is used, the height of the broadcast video display area is not different from the height of the entire screen.

  The enlargement / reduction unit 6 determines that the enlargement / reduction rate W2 / W1 obtained from the width W1 of the caption and the width W2 of the broadcast video display area exceeds a predetermined maximum enlargement / reduction rate. The broadcast video is enlarged or reduced in the width direction according to the rate. For example, when the horizontal width W1 of the subtitle is considerably smaller than the horizontal width W2 of the broadcast video display area, the enlargement ratio W2 / W1 is increased, and the broadcast video is displayed extremely enlarged, so that it becomes difficult to view. On the other hand, when the horizontal width W1 of the subtitle is considerably larger than the horizontal width W2 of the broadcast video display area, the reduction rate W2 / W1 becomes small, and the broadcast video is extremely reduced and displayed. In order to prevent such deterioration of visibility, it is preferable to set a predetermined maximum enlargement / reduction ratio so that extreme enlargement or reduction is not performed.

  By the way, the width of the caption displayed together with the video information of the broadcast video is not always fixed. Therefore, the subtitle width detection unit 5 executes a process of detecting the horizontal width of the subtitle displayed together with the video information even after the broadcast video is enlarged or reduced by the enlargement / reduction unit 6 as shown in FIG. . Here, it is assumed that the width of the subtitle detected before (the width when the broadcast video has been expanded / reduced most recently) is W1, and the width of the subtitle detected later is W1 '.

  If the width W1 ′ of the subtitle detected later is larger than the width W1 of the subtitle detected before, if the broadcast video is continuously displayed at the previous enlargement / reduction ratio W2 / W1, the subtitle detected later Part of the video image protrudes outside the broadcast video display area, and the left and right edge portions of the subtitle are cut off and cannot be seen. Therefore, when the horizontal width W1 ′ of the subtitle detected later is larger than the horizontal width W1 ′ of the subtitle previously detected by the subtitle width detection unit 5, the enlargement / reduction unit 6 determines the subtitle width detected after that. Based on the horizontal width W1 ′ and the horizontal width W2 of the broadcast video display area, an enlargement / reduction rate W2 / W1 ′ is newly calculated so that the subtitle width matches the horizontal width W2 of the broadcast video display area, and the newly determined enlargement / reduction rate The broadcast video is enlarged or reduced in the width direction according to W2 / W1 ′.

  On the other hand, when the width W1 ′ of the subtitle detected later is not larger than the width W1 ′ of the subtitle detected before, the enlargement / reduction unit 6 does not perform the enlargement or reduction of the broadcast video again. Maintain video size. When the width W1 ′ of the subtitle detected later is smaller than the width W1 of the subtitle detected before, the enlargement / reduction ratio W2 / W1 ′ is obtained again to enlarge or reduce the broadcast video. You can do it, but if you don't do it, the subtitles will not be missing. Therefore, in order to avoid frequent changes in the size of the broadcast video in accordance with the width of the subtitle, it is preferable that the enlargement / reduction of the broadcast video is performed again only when the subtitle is missing.

  Further, the display mode is not always fixed to the two-screen display mode during the display of the broadcast video. Therefore, the display size determination unit 4 is based on the display mode setting information stored in the system memory 3 even after the broadcast video is enlarged or reduced by the enlargement / reduction unit 6 as shown in FIG. It is determined whether the two-screen display mode is set. Here, when the display size determination unit 4 determines that the display mode has been changed to the full screen display mode (that is, the video is displayed on the predetermined size screen), the enlargement / reduction unit 6 displays the broadcast video. Cancel the enlargement and reduction of.

  Next, the operation of the video processing apparatus 10 according to the present embodiment configured as described above will be described. FIG. 3 is a flowchart showing an operation example of the video processing apparatus 10 according to the present embodiment. Note that the flowchart shown in FIG. 3 starts when the video processing apparatus 10 is turned on.

  First, the display size determination unit 4 determines whether or not the two-screen display mode is set based on the display mode setting information stored in the system memory 3 (step S1). Here, when it is determined that the two-screen display mode is set, the subtitle width detection unit 5 displays together with the video information of the broadcast video based on the subtitle display position information supplied from the digital broadcast receiver 30. The horizontal width W1 of the subtitle to be played is detected (step S2).

  Next, the enlargement / reduction unit 6 determines the enlargement / reduction rate W2 / W1 of the broadcast video based on the horizontal width W1 of the subtitle detected by the subtitle width detection unit 5 and the horizontal width W2 of the broadcast video display area (step) S3). Then, the enlargement / reduction unit 6 enlarges or reduces the broadcast video in the width direction in accordance with the enlargement / reduction rate W2 / W1, and outputs it to the display control unit 1 (step S4). The display control unit 1 displays the map image supplied from the navigation device 20 and the enlarged / reduced broadcast video supplied from the enlargement / reduction unit 6 on the display 40 in two screens (step S5).

  Thereafter, the subtitle width detection unit 5 detects again the horizontal width W1 'of the subtitle displayed together with the video information of the broadcast video based on the subtitle display position information supplied from the digital broadcast receiver 30 (step S6). Then, it is determined whether or not the horizontal width W1 'of the subtitle detected later in step S6 is larger than the horizontal width W1 when the broadcast video has been enlarged / reduced most recently (step S7).

  Here, when the subtitle width detection unit 5 determines that W1 <W1 ′, the enlargement / reduction unit 6 sets the horizontal width W1 ′ of the subtitle detected in step S6 and the horizontal width W2 of the broadcast video display area. Based on this, the enlargement / reduction rate W2 / W1 ′ of the broadcast video is obtained again (step S8). Then, the enlargement / reduction unit 6 enlarges or reduces the broadcast video in the width direction in accordance with the enlargement / reduction rate W2 / W1 'and outputs it to the display control unit 1 (step S9). The display control unit 1 updates the broadcast video displayed in the two-screen broadcast video display area to a broadcast video that has been enlarged / reduced according to the new enlargement / reduction ratio W2 / W1 ′ (step S10). .

  After that, the caption width detection unit 5 stores the caption width W1 'detected in step S6 as the width W1 when the broadcast video has been expanded / reduced recently (step S11). Next, the display size determination unit 4 determines whether or not the full screen display mode is set based on the display mode setting information stored in the system memory 3 (step S12). If it is determined that the full screen display mode is not set, the process returns to step S6.

  If it is determined in step S7 that the subtitle width detection unit 5 does not satisfy W1 <W1 ', the process transitions to step S12. That is, the size and size of the broadcast video displayed in the broadcast video display area are maintained as they are without re-enlarging and reducing the broadcast video.

  When the display size determination unit 4 determines that the full screen display mode is set in step S12, the display control unit 1 causes the display 40 to display either a map image or a broadcast video on the full screen (step S12). S13). Thereafter, the process returns to step S1. In this step S1, when the display size determining unit 4 determines that the two-screen display mode is not set, the process transitions to step S13.

  It should be noted that it is possible to determine in advance whether the map image or the broadcast video is to be displayed in full screen in step S13. For example, the left screen area of the two screens may be a main screen, the right screen area may be a sub screen, and the main screen may be displayed in full screen. Or memorize the one that was displayed in full screen display mode before switching to the two screen display mode, and remember the one that was memorized when returning to the full screen display mode from the two screen display mode A full screen may be displayed.

  As described above in detail, in this embodiment, when the two-screen display mode is set, the broadcast video is displayed when the broadcast video is displayed on a different size screen (broadcast video display area) different from the predetermined size screen (full screen). Based on the horizontal width of the subtitles displayed together with the video information and the horizontal width of the broadcast video display area, an enlargement / reduction ratio is obtained such that the subtitle width matches the horizontal width of the broadcast video display area. Is expanded or reduced in the width direction.

  According to the video processing apparatus 10 of the present embodiment configured as described above, the caption displayed together with the video information is the largest in the broadcast video display area and is displayed without interruption. In addition, unless the width of the broadcast video display area is considerably smaller than the width of the caption, the video information is not greatly reduced in the width direction, and the video information displayed in the broadcast video display area is in a vertically elongated state. Can be prevented. Furthermore, since the video information is not reduced as a whole, it is possible to prevent the video displayed in the broadcast video display area from becoming too small. Thereby, for example, when displaying a video on an irregular size screen in the two-screen display mode, the visibility of the video can be improved as compared with the conventional case.

  In the above-described embodiment, the two-screen display mode has been described as an example of displaying video information on the irregular size screen. However, the present invention is not limited to this. For example, in a system in which broadcast video can be displayed by selecting any of devices with different screen sizes, such as a television receiver, personal computer, mobile phone, etc. Is possible.

  In the above embodiment, the broadcast video is described as an example of the video displayed on the atypical size screen, but the present invention is not limited to this. For example, the present invention can be applied as long as captions are displayed together with video information such as a DVD (Digital Versatile Disk) playback video.

  Further, although the above embodiment has been described on the assumption that subtitles are displayed together with video information, subtitles are not displayed together with video information when the subtitle display function is set to off. Even in this case, although the caption is not displayed on the display 40, the enlargement / reduction ratio of the video information may be obtained using the display position information of the caption supplied from the digital broadcast receiving device 30.

  In addition, each of the above-described embodiments is merely an example of implementation in carrying out the present invention, and the technical scope of the present invention should not be construed in a limited manner. That is, the present invention can be implemented in various forms without departing from the gist or the main features thereof.

DESCRIPTION OF SYMBOLS 1 Display control part 4 Display size determination part 5 Subtitle width detection part 6 Enlarging / reducing part 10 Image processing apparatus

Claims (6)

A display size determination unit that determines whether to display a video on a different size screen different from the predetermined size screen;
A subtitle width detecting unit that detects a horizontal width of a subtitle displayed together with the video when the display size determining unit determines to display the video on the irregular size screen;
Based on the width of the caption detected by the caption width detection unit and the width of the irregular size screen, an enlargement / reduction ratio is obtained so that the caption width matches the width of the irregular size screen, and according to the enlargement / reduction ratio An image processing apparatus comprising: an enlargement / reduction unit that enlarges or reduces the image in the width direction. Even after the video is enlarged or reduced by the enlargement / reduction unit, the detection processing by the caption width detection unit is executed,
When the horizontal width of the subtitle detected later is larger than the horizontal width of the subtitle previously detected by the subtitle width detection unit, the enlargement / reduction unit determines the horizontal width of the subtitle detected later and the variant size. Based on the horizontal width of the screen, an enlargement / reduction ratio is newly determined so that the caption width matches the horizontal width of the irregular size screen, and the video is expanded or reduced in the width direction according to the newly determined expansion / reduction ratio. The video processing apparatus according to claim 1, wherein: The enlargement / reduction unit maintains the size without re-enlarging and reducing the video when the horizontal width of the subtitle detected after the subtitle is not larger than the horizontal width of the subtitle detected before. The video processing apparatus according to claim 2. The enlargement / reduction unit, when the obtained enlargement / reduction rate exceeds a predetermined maximum enlargement / reduction rate, enlarges or reduces the video in the width direction according to the maximum enlargement / reduction rate. A video processing apparatus as described above. Even after the video is enlarged or reduced by the enlargement / reduction unit, the determination process by the display size determination unit is executed,
2. The video according to claim 1, wherein the enlargement / reduction unit cancels the enlargement and reduction of the video when the display size determination unit determines to display the video on the predetermined size screen. Processing equipment. A first step in which a display size determination unit of the video processing device determines whether or not to display a video on a different size screen different from the predetermined size screen;
A second step in which a subtitle width detection unit of the video processing device detects a horizontal width of a subtitle displayed together with the video when the display size determination unit determines to display the video on the irregular size screen;
The enlargement / reduction unit of the video processing apparatus performs enlargement / reduction so that the subtitle width matches the horizontal width of the irregular size screen based on the horizontal width of the subtitle detected by the subtitle width detection unit and the horizontal width of the irregular size screen. And a third step of enlarging or reducing the video in the width direction in accordance with the enlargement / reduction ratio.

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