Video display control device, control method thereof, and program

Abstract

Provided is a video display control device that extracts one or more candidate video output settings with which display by a connected display device is possible, and for each of the one or more candidate video output settings, outputs a video signal based on the candidate video output setting to inspect whether or not display by the display device is possible.

Description

[Technical Field]

[0001] The present invention relates to a video display control device for displaying a video on a display device, a control method thereof, and a control program thereof. [Background technology]

[0002] Generally, display devices that display video support multiple types of video output settings (screen resolution, scanning method, etc.) as specifications for video signals supplied from video display control devices such as home game consoles, and the types of video output settings supported vary depending on the model of the display device. In order to display video on a connected display device, the video display control device needs to output a video signal that conforms to the video output settings supported by that display device. Summary of the Invention [Problem to be solved by the invention]

[0003] Typically, video output settings define the specifications for video signals that correspond to those settings, and if both the video display control device and the display device support the same video output settings, they should be able to display those video signals. However, depending on the video signal standard, detailed specifications such as synchronization signals included in the video signal are not strictly defined, and implementations may vary between manufacturers, or there may be discrepancies within the range of allowable specifications. In such cases, even if the video display control device outputs a video signal that corresponds to the video output settings supported by the display device, the display device may not be able to display that video signal properly.

[0004] The present invention has been made in consideration of the above-mentioned situation, and one of its purposes is to provide a video display control device, a control method thereof, and a program that can output a video signal with a video output setting that can actually be displayed by a display device. [Means for solving the problem]

[0005] A video display control device according to one embodiment of the present invention is a video display control device connected to a display device and equipped with one or more processors, wherein the one or more processors extract one or more candidate video output settings that can be displayed by the display device, and for each of the one or more candidates, output a video signal based on the candidate video output setting to verify whether the display device can display the video signal.

[0006] A control method for a video display control device according to one embodiment of the present invention is a control method for a video display control device connected to a display device, characterized in that it extracts one or more candidates for video output settings that can be displayed by the display device, and for each of the one or more candidates, outputs a video signal based on the video output setting of the candidate to verify whether the display device can display the video.

[0007] A program according to one aspect of the present invention is a program for controlling a video display control device connected to a display device, the program causing the video display control device to execute a process of extracting one or more candidates for video output settings that can be displayed by the display device, and outputting a video signal based on the video output setting of each of the one or more candidates to verify whether the display device can display the video signal. This program may be provided by being stored in a computer-readable, non-transitory information storage medium. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a configuration of a video display control device according to an embodiment of the present invention; [Figure 2] 1 is a functional block diagram showing functions of a video display control device according to an embodiment of the present invention; [Figure 3] FIG. 10 is a flowchart showing an example of the flow of a verification process for video output settings. [Figure 4] FIG. 10 is a diagram illustrating an example of a screen presenting verification candidates. [Figure 5] FIG. 10 is a diagram illustrating another example of a screen presenting verification candidates. [Figure 6] FIG. 10 is a diagram showing an example of a display confirmation screen for video output settings. [Figure 7] FIG. 10 is a diagram illustrating an example of a screen presenting a verified setting. [Figure 8] FIG. 10 is a diagram showing an example of a screen presenting verification candidates in a case where the VRR method is supported. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0010] 1 is a block diagram showing the configuration of a video display control device 10 according to one embodiment of the present invention. The video display control device 10 is, for example, a home game console, a portable game console, a personal computer, or the like, and as shown in the figure, is configured to include a control unit 11, a storage unit 12, and an interface unit 13. The video display control device 10 is also connected to a display device 14 and an operation device 15.

[0011] The control unit 11 includes at least one processor such as a CPU, and performs various information processing by executing programs stored in the storage unit 12. Specific examples of the processing performed by the control unit 11 in this embodiment will be described later. The storage unit 12 includes at least one memory device such as a RAM, and stores the programs executed by the control unit 11 and data processed by the programs.

[0012] The interface unit 13 is an interface for data communication between the display device 14 and the operation device 15. The video display control device 10 is connected to the display device 14 and the operation device 15 via the interface unit 13 either wired or wirelessly. Specifically, the interface unit 13 includes a multimedia interface for transmitting a video signal supplied by the video display control device 10 to the display device 14. It also includes a data communication interface for receiving a signal indicating the operation content performed by the user on the operation device 15.

[0013] The display device 14 is a liquid crystal display, an organic EL display, or the like, and receives the video signal output by the video display control device 10 and displays an image corresponding to the received video signal on the screen.

[0014] The operation device 15 is, for example, a controller for a home game console, and receives operation input from a user. The operation device 15 is connected to the video display control device 10 by wire or wirelessly, and transmits an operation signal indicating the content of the operation input received from the user to the video display control device 10.

[0015] The functions realized by the video display control device 10 will be described below with reference to the functional block diagram of Fig. 2. As shown in Fig. 2, the video display control device 10 is functionally configured to include an operation setting management unit 21, a verification candidate extraction unit 22, and a verification unit 23. These functions are realized by the control unit 11 operating in accordance with one or more programs stored in the storage unit 12. These programs may be provided to the video display control device 10 via a communication network such as the Internet, or may be provided by being stored in a computer-readable information storage medium such as an optical disk.

[0016] The operation setting management unit 21 stores various setting information related to the operation of the video display control device 10 in the storage unit 12, and updates the contents of the information in response to user instructions, etc. Specifically, when the user issues an instruction to start changing the operation settings, for example, the operation setting management unit 21 displays an operation setting change acceptance screen on the display device 14. In this state, the operation setting management unit 21 accepts a selection operation from the user and updates the contents of the setting information stored in the video display control device 10.

[0017] In particular, in this embodiment, the setting information held by the operation setting management unit 21 includes the contents of settings (hereinafter referred to as video output settings) related to the specifications, format, and standards of the video signal that the video display control device 10 outputs to the display device 14. The video output settings may include setting items such as the resolution of the video to be displayed on the screen of the display device 14 (here, this refers to the number of pixels of each frame image that makes up the video), the scanning method (interlaced method or progressive method), the frame rate (the number of frames updated per second), and the dynamic range (the range of brightness and darkness of the displayed colors; standard dynamic range, high dynamic range, etc.), or any combination of these setting items.

[0018] The operational setting management unit 21 presents the user with multiple selectable options for each setting item included in the video output settings, and records the video output setting selected by the user from the presented options as part of the setting information. The video display control device 10 generates a video signal based on the video output settings recorded by the operational setting management unit 21 and outputs it to the display device 14. Note that the operational setting management unit 21 records different video output settings as setting information for each type of display device 14 connected. This allows the user to use different types of video output settings depending on the type of display device 14 connected to the video display control device 10. Note that the type of display device 14 can be identified by referring to information provided by the display device 14.

[0019] This video output setting cannot be changed arbitrarily by the user, but must be a setting supported by the connected display device 14 (i.e., compatible with the display device 14). If a resolution or frame rate not supported by the display device 14 is selected, the display device 14 may not be able to properly display the video signal output by the video display control device 10. Therefore, it is desirable that the operation setting management unit 21 obtains in advance the content of the video output setting supported by the display device 14, and allows the user to change the setting within that range.

[0020] However, even if the display device 14 supports a video output setting, there are cases where the display device 14 is unable to actually display a video signal that conforms to the specifications. In particular, with a resolution setting called 1440p (a setting with 1440 vertical pixels and a progressive scanning method), it has been found that even if the display device 14 supports that resolution setting, the display device 14 may not be able to properly display the video signal output by the video display control device 10 depending on the content of the video output setting. Therefore, the video display control device 10 according to this embodiment is configured to verify in advance the content of the video output setting that the display device 14 can actually display when the user desires video output at that resolution setting.

[0021] Specifically, the verification candidate extraction unit 22 and the verification unit 23, which will be described later, perform a verification process to identify video output settings that can actually be displayed by the display device 14. Hereinafter, a video output setting that has been verified by the verification unit 23 as being actually displayable by the display device 14 is referred to as a verified setting. The operational setting management unit 21 presents setting items that match the verified settings to the user as options, and restricts the selection of setting items that do not match the verified settings, thereby preventing the user from selecting a video output setting that cannot actually be displayed by the display device 14.

[0022] The operational setting management unit 21 restricts the selection of a predetermined setting (here, the resolution setting of "1440p") as a video output setting option until the verification process is completed. Specifically, if the verification process is not completed, the operational setting management unit 21 may not display "1440p" as a resolution option on the operational setting change screen in the first place, or may display the "1440p" option in a different manner from the selectable items (for example, grayed out) to indicate that it is not selectable. Alternatively, the operational setting management unit 21 may display "1440p" as one of the options, and if the user selects that option, present the user with a message indicating that verification process must be performed in advance. Furthermore, if the user selects that option, the verification process of the video output setting may be started immediately.

[0023] To enable such control, the operational setting management unit 21 associates verification flag information, which indicates whether a video output setting verification process has been performed on the display device 14, with specific information (such as the model name and model number of the display device 14) that identifies the type of display device 14. The operational setting management unit 21 identifies the type of display device 14 currently connected, for example, when the video display control device 10 is started or when a new display device 14 is connected. This identification can be achieved by referencing information provided by the display device 14, as described above. After identifying the type of display device 14, the operational setting management unit 21 determines whether a verification process has been performed on the display device 14 by referencing the verification flag information stored in association with the currently connected display device 14. If a verification process has not been performed on the display device 14, the operational setting management unit 21 restricts the user from selecting the "1440p" resolution setting. Conversely, if a verification process has been performed on the display device 14, the operational setting management unit 21 makes "1440p" selectable as a resolution option. Note that when an unknown display device 14 is newly connected, the operational setting management unit 21 initially sets the verification flag information for the display device 14 to a value indicating that the verification process has not been performed and stores it anew.

[0024] The verification candidate extraction unit 22 extracts candidates for video output settings that may actually be displayed by the display device 14. The video output settings extracted by the verification candidate extraction unit 22 are subject to verification processing by the verification unit 23, which will be described later. Hereinafter, the candidates for video output settings extracted by the verification candidate extraction unit 22 are referred to as verification candidates.

[0025] Specifically, the verification candidate extraction unit 22 acquires support information provided by the connected display device 14 and extracts video output setting candidates based on the content of the support information. This support information is information indicating the video output settings supported by the display device 14. Known examples of support information include EDID (Extended Display Identification Data). By extracting video output settings that are determined to be supported based on the support information as verification candidates, video output settings that are not supported by the display device 14, i.e., cannot be displayed, can be excluded from the verification candidates in advance. Because the support information is information provided by the display device 14 itself, there is a high possibility that the video output setting can be displayed on the display device 14. However, as mentioned above, there are cases where the display device 14 cannot actually display the video output setting due to minor discrepancies in specifications, etc.

[0026] Furthermore, the verification candidate extraction unit 22 may narrow down the verification candidates based on the contents of the current video output settings included in the setting information held by the operational setting management unit 21 (i.e., the contents of the video output settings already set by the user). For example, if the user has set the dynamic range to use standard dynamic range (SDR), the verification candidate extraction unit 22 may selectively extract the standard dynamic range video output settings as verification candidates, and exclude the high dynamic range (HDR) video output settings from the verification candidates. Also, if the user has selected a setting to use a high frame rate as the frame rate setting, the verification candidate extraction unit 22 may selectively extract the video output settings with a frame rate equal to or higher than a predetermined value as verification candidates, and exclude the video output settings with a low frame rate from the verification candidates.

[0027] Furthermore, if a video output setting that is not to be used in the video output settings managed by the operational setting management unit 21 is supported by the display device 14, the verification candidate extraction unit 22 may present a message to the user urging them to change the setting to include such a video output setting in the verification candidates. For example, if the user has set the display device 14 not to use high dynamic range, but the display device 14 supports a high dynamic range video output setting, the verification candidate extraction unit 22 excludes the high dynamic range video output setting from the verification candidates and presents the user with a message informing them that the high dynamic range video output setting can be included in the verification candidates by changing the setting information. This makes it possible to avoid a situation in which a video output setting supported by the display device 14 is excluded from the verification candidates against the user's intention.

[0028] Furthermore, the verification candidate extraction unit 22 may present to the user candidate video output settings extracted based on support information, etc., of the display device 14, and may accept from the user a selection of video output settings to be individually adopted as verification candidates. For example, the verification candidate extraction unit 22 may present to the user a list of video output settings supported by the display device 14, and when the user instructs to exclude some video output settings from the list, the verification candidate extraction unit 22 may exclude the video output settings that are the subject of the instruction from the verification candidates. This allows the user to verify only the video output settings that they wish to use.

[0029] For each of the verification candidates for the video output setting extracted by the verification candidate extraction unit 22, the verification unit 23 verifies whether the display device 14 can actually display the video signal of that video output setting. Specifically, for each of the verification candidates, the verification unit 23 actually outputs a verification video signal based on that video output setting. Then, the verification unit 23 receives a result input from the user regarding whether the verification video was displayed normally on the display device 14. If the user responds that the video was displayed normally, it can be determined that the video output setting of that verification candidate is usable. On the other hand, if the user responds that the video was not displayed normally, or if the user does not enter any response within a predetermined time, it can be determined that the display device 14 cannot display normally with that video output setting and is therefore not usable. This makes it possible to determine whether the display device 14 can actually display with that video output setting for all of the multiple verification candidates.

[0030] When the verification unit 23 has finished verifying all the verification candidates, it records the video output settings that are determined to be capable of being displayed normally (available) as verified settings. As described above, the operational setting management unit 21 presents these recorded verified settings as options for video output settings that the user can select.

[0031] An example of the flow of the video output setting verification process will be explained below using the flow diagram in Figure 3. Here, it is assumed that the video output setting verification process is executed when the user uses the "1440p" video output setting. This flow starts when the user selects the menu item "Test 1440p output" while the operational setting management unit 21 is displaying the operational setting change screen.

[0032] First, the verification candidate extraction unit 22 acquires support information from the display device 14 and identifies video output settings supported by the display device 14 for a resolution and scanning method of 1440p (S1). Furthermore, the verification candidate extraction unit 22 refers to the setting information held by the operation setting management unit 21 to narrow down the video output settings identified in S1 and determine the video output settings of the verification candidates (S2).

[0033] Thereafter, the verification unit 23 presents to the user the verification candidates extracted by the verification candidate extraction unit 22 in S1 and S2 (S3). FIG. 4 shows an example of a presentation screen on which the verification candidates are presented to the user. As a specific example, it is assumed here that three video output settings, "60Hz SDR," "60Hz HDR," and "120Hz HDR," have been extracted as verification candidates. Note that in this example, combinations of frame rate and dynamic range settings have been extracted as verification candidates, with 60Hz and 120Hz representing frame rate values. Furthermore, SDR represents standard dynamic range, and HDR represents high dynamic range, respectively.

[0034] 5 shows another example of a verification candidate presentation screen. In this example, the device has been set up so that high dynamic range is not used, and therefore high dynamic range video output settings are excluded from the verification candidates. However, the verification candidate presentation screen includes a message indicating that the high dynamic range video output setting must be changed to a setting that uses high dynamic range in order to be included as a verification candidate.

[0035] Thereafter, when the user performs an operation to instruct to continue the verification, the verification unit 23 verifies whether each of the verification candidates presented in S3 can actually be displayed on the display device 14. Specifically, the verification unit 23 actually outputs a video signal based on the video output setting to be verified, and presents the user with a display confirmation screen for confirming whether the display based on the manufacturing output setting is normal (S4). With this display confirmation screen presented to the user, the verification unit 23 determines whether the display confirmation screen is displayed normally (i.e., whether the video output setting of the verification candidate to be verified is usable) according to the operation content accepted from the user (S5).

[0036] 6 shows an example of a display confirmation screen for video output settings. This display confirmation screen includes a confirmation button (the "Yes" button in the figure) that should be operated if the screen is displayed normally. If the confirmation screen is displayed normally, the user operates the confirmation button to notify the video display control device 10 that the verification was successful. In this case, the verification unit 23 adds the verification candidate being verified to the verified settings (S6).

[0037] Conversely, if there is an abnormality in the display of the confirmation screen, the user may operate a button to indicate this (the "No" button in the figure). In this case, the verification unit 23 determines that the verification has failed and does not include the verification candidate under verification in the verified settings. However, in the case of a video output setting that cannot be displayed on the display device 14, there is a possibility that the user will not be able to visually see the confirmation screen itself, for example, nothing will be displayed on the screen. Therefore, if a predetermined time has passed while the confirmation screen is displayed without the user operating any button, the verification unit 23 determines that the verification has failed, just as if the "No" button had been operated, and does not include the verification candidate under verification in the verified settings.

[0038] The verification unit 23 repeats the processes from S4 to S6 for each verification candidate until verification is complete for all of the verification candidates presented to the user in S3 (S7). When verification is complete for all verification candidates, the verification unit 23 updates the content of the setting information held by the operational setting management unit 21 (S8). Specifically, the verification unit 23 associates the flag information with information identifying the currently connected display device 14, indicating that verification processing for the "1440p" setting has been performed for the display device 14. In addition, the verification unit 23 records the video output setting that has been successfully verified and added to the verified settings as a displayable video output setting, in association with information identifying the currently connected display device 14.

[0039] Furthermore, the verification unit 23 presents a list of the recorded verified settings to the user (S9). Fig. 7 shows an example of a screen presenting the verified settings. This screen shows that, of the three verification candidates presented to the user in S3, two verification candidates, "60Hz SDR" and "60Hz HDR," have been successfully verified.

[0040] By executing the setting information update process of S8, after the verification process, the operational setting management unit 21 becomes able to accept a video output setting selection from the user based on the contents of the updated setting information. Specifically, the operational setting management unit 21 presents "1440p," which has undergone the verification process, to the user as one of the resolution setting options. The operational setting management unit 21 also presents "60Hz SDR" and "60Hz HDR," which are verified settings, to the user as frame rate and dynamic range options. On the other hand, the operational setting management unit 21 controls the video output setting of "120Hz HDR," which has been determined as unable to be displayed properly as a result of the verification, so that it is not presented to the user as an option or is presented in an unselectable state. This restricts the user's selection of unverified video output settings, preventing the user from accidentally selecting a video output setting that cannot be displayed on the display device 14.

[0041] Note that the operational setting management unit 21 may allow the user to select each setting item individually, instead of presenting combinations of setting items of frame rate and dynamic range to the user as options. In this case, the operational setting management unit 21 determines whether the combination selected by the user matches the video output settings (verified settings) that can be displayed on the display device 14, and notifies the user that the combination is not selectable if it does not match. Alternatively, the operational setting management unit 21 may limit the options that the user can select for one setting item depending on the selection of the other setting item, so that only combinations of setting items that match the verified settings can be selected.

[0042] As described above, according to the video display control device 10 of this embodiment, by performing a verification process in advance for a specific video output setting before the user selects that setting, the user can reliably select a video output setting that can be displayed on the display device 14. Furthermore, when performing the verification process, by extracting video output settings that are candidates for verification based on the support information of the display device 14, the settings made by the user, etc., it is possible to avoid unnecessary verification processes and reduce the effort required for the verification process.

[0043] It should be noted that the embodiments of the present invention are not limited to those described above. For example, in the above description, the video display control device 10 executes a verification process to enable the user to select a resolution setting of "1440p." However, the present invention is not limited to this, and a preliminary verification process may be executed to enable the user to select other video output settings.

[0044] In the above description, the video output settings to be verified are combinations of frame rate and dynamic range. However, the verification process may be performed using other setting items or combinations of various setting items as the video output settings to be verified.

[0045] Furthermore, the screen contents presented to the user in the above explanation are merely examples, and the video display control device 10 may display screens with various contents.

[0046] The video output settings to be verified may include settings that use the VRR (Variable Refresh Rate) method. Here, an example of control when the video display control device 10 executes verification processing for video output settings that use the VRR method will be described.

[0047] Generally, when display device 14 is compatible with the VRR (variable refresh rate) system, a range of refresh rates supported by display device 14 is defined. Video display control device 10, which outputs a video signal in accordance with the VRR system, determines the range of refresh rates to be actually used (hereinafter referred to as the usage rate range) within the range of refresh rates supported by display device 14. Then, frame images are drawn and output while changing the refresh rate within the determined usage rate range according to the situation.

[0048] In this case, even if the refresh rate is within the range supported by display device 14, minor display anomalies such as changes in screen brightness or tearing may occur depending on the type of display device 14 and the refresh rate used. Therefore, when outputting video using the VRR method, it is desirable for video display control device 10 to verify in advance not only whether display device 14 supports the VRR method, but also whether display device 14 can display video normally within the range of rates actually used.

[0049] However, while the video display control device 10 may be able to adopt various refresh rate ranges as its usage rate range due to its specifications, it would be time-consuming to verify in advance whether the display device 14 is capable of displaying all of them. Therefore, for example, the verification candidate extraction unit 22 extracts a verification candidate from one or more predetermined rate range candidates. This rate range candidate may be a typical refresh rate range that the video display control device 10 may actually use as its usage rate range. In the following specific example, it is assumed that the video display control device 10 has prepared two rate range candidates, "48-60 Hz" and "48-120 Hz," in advance for video output settings that use the VRR method.

[0050] In this case, the verification candidate extraction unit 22 determines whether the display device 14 supports the VRR system by referencing the support information provided by the display device 14. If the display device 14 does not support the VRR system, the verification candidate extraction unit 22 excludes all video output settings that use the VRR system from the verification candidates. On the other hand, if the display device 14 supports the VRR system, the verification candidate extraction unit 22 further refers to the support information provided by the display device 14 and extracts, as verification candidates, rate range candidates that fall within the range of refresh rates supported by the display device 14 (i.e., rate range candidates whose entire refresh rates are supported by the display device 14). For example, assume that the connected display device 14 supports the VRR system but supports a refresh rate range from 48 Hz to 100 Hz. In this case, the verification candidate extraction unit 22 excludes the rate range candidate "48-120 Hz" from the verification candidates, because this rate range includes a refresh rate range not supported by the display device 14, and extracts only "48-60 Hz" as a verification candidate.

[0051] The video output setting candidates extracted by the verification candidate extraction unit 22 as verification candidates may be video output settings that include combinations of predetermined rate range candidates in the VRR system and other setting items. For example, if video output is performed in a specific usage rate range and colors are specified in a specific color space format, the verification candidate extraction unit 22 extracts that combination as a verification candidate. As a specific example, when the video display control device 10 uses the VRR system with a usage rate range of "48-60 Hz," the "RGB" format is used, and when the VRR system is used with a usage rate range of "48-120 Hz," colors are specified in the "YUV422" format due to bandwidth issues. In this case, the verification candidate extraction unit 22 extracts these combinations as verification candidates, and the verification unit 23 performs verification processing on these video output setting combinations as verification candidates.

[0052] Figure 8 shows an example of a display when such VRR method rate range candidates are included in the verification candidates. In addition to the three verification candidates shown in Figure 4, video output settings that use two types of VRR methods, "VRR 48-60Hz HDR" and "VRR 48-120Hz HDR," are extracted as verification candidates.

[0053] Even when the verification candidates include video output settings that use the VRR method, the verification unit 23, as in the embodiments described above, displays a display confirmation screen for each of the verification candidates extracted by the verification candidate extraction unit 22 and verifies whether the display is performed normally with that verification candidate. However, when outputting video using the VRR method, it takes time and is undesirable to perform verification for all refresh rates included in the rate range used. Therefore, when the verification unit 23 displays a display confirmation screen for a rate range candidate prepared in advance and performs verification processing, it may selectively use multiple verification rates predetermined for that rate range candidate as verification targets.

[0054] Here, the multiple verification rates preferably include at least the minimum and maximum values ​​of the rate range candidates, and may also include intermediate values. Furthermore, if an intermediate value between the minimum and maximum values ​​is used as the verification rate, that value may be a value typically used for video output. As an example, if the rate range candidate is 48 Hz to 60 Hz, verification is performed using two refresh rates, 48 ​​Hz and 60 Hz. Furthermore, if the rate range candidate is 48 Hz to 120 Hz, verification is performed using three refresh rates, 48 ​​Hz, 60 Hz, and 120 Hz. Here, 60 Hz is a refresh rate that the video display control device 10 is likely to frequently use when the usage rate range is between 48 Hz and 120 Hz.

[0055] When displaying the display confirmation screen and performing the verification process, the verification unit 23 outputs video in the VRR format while switching between multiple verification rates in a relatively short cycle. For example, if there are two verification rates, 48 ​​Hz and 60 Hz, the verification unit 23 continues to display the display confirmation screen while alternately switching between two output patterns: video signal output at 48 Hz for 0.5 seconds and video signal output at 60 Hz for 0.5 seconds. In this case, one cycle is one second, so as long as the display confirmation screen continues to be displayed for at least one second, the user can verify that the video is displayed correctly at either of the two verification rates.

[0056] In the display confirmation screen shown in FIG. 6, the "No" button is selected when the display starts. Therefore, in order for the user to confirm that the display is normal, two operations are required: first, to switch the selection so that the "Yes" button is selected, and then to confirm the selected button. In this way, by requiring the user to perform two or more operations to confirm that the display is normal, if the switching cycle of the verification rate is fast enough, it is possible to prevent the user from finishing their response before the video is displayed at all the verification rates (i.e., before one cycle of the switching cycle of the verification rate is completed), and it is expected that the user will be able to complete the verification after checking the video output at all the verification rates.

[0057] In this way, by displaying a display confirmation screen while switching between multiple verification rates and then accepting responses from the user, it is possible to verify whether the screen display is performed normally at any of the multiple verification rates. This method does not verify whether the display is performed normally at refresh rates other than the verification rate. However, by performing verification at multiple verification rates including the minimum and maximum values ​​of the usage rate range, it is more likely that the display will be normal at other refresh rates included in the usage rate range.

[0058] In the above description, a screen including a message such as that shown in Fig. 6 is displayed as a display confirmation screen for the video output settings. However, when a video signal based on the VRR system is output, it may be difficult to determine whether the display is normal without checking the video content that changes over multiple frames. Specifically, depending on the content of the video output settings, when the video display control device 10 outputs a video signal based on the VRR system, even if the display device 14 can normally display each frame image, the video display control device 10 may not be able to refresh the frame images at the update timing intended by the video display control device 10, resulting in a distorted image.

[0059] Therefore, when verifying each verification candidate for a video output setting, the verification unit 23 may display on the display device 14 a video whose content changes in a predetermined pattern over a certain period of time as a verification video. In this case, the verification video may be, for example, a video in which a waveform pattern changes repeatedly at a certain interval. If the display device 14 cannot properly support the VRR system, displaying such a verification video may cause display disturbances, such as jerky or irregular changes in the waveform pattern. In such a case, if the user inputs a response that the verification video is not displayed correctly, the verification unit 23 can determine not to add the verification candidate to the verified settings. In this way, by the verification unit 23 displaying a confirmation video of a predetermined pattern for each verification candidate, it is possible to verify in more detail whether the display device 14 is compatible with the video output setting.

[0060] Furthermore, the verification unit 23 may verify whether audio is being played back normally based on not only the video signal but also the audio signal. In this case, the video output settings to be verified may include not only settings related to the video signal but also settings related to the specifications, format, and standards of the audio signal to be output to the display device 14 together with the video signal. For each verification candidate of the video output setting including settings related to the audio signal, the verification unit 23 outputs an audio signal of a predetermined pattern (for example, a beep or a sine wave audio signal) and plays audio based on the audio signal from the speaker provided in the display device 14. In response, the user answers whether the audio is being played back normally (e.g., whether the audio can be heard). In this way, the verification unit 23 can verify not only whether the video is being displayed normally but also whether the audio is being played back normally for each verification candidate. [Explanation of symbols]

[0061] 10 video display control device, 11 control unit, 12 memory unit, 13 interface unit, 14 display device, 15 operation device, 21 operation setting management unit, 22 verification candidate extraction unit, 23 verification unit

Claims

1. A video display control device connected to a display device and including one or more processors, the one or more processors: the display device extracts one or more displayable video output setting candidates based on the contents of the video output setting previously set by a user; outputting a video signal based on the video output setting of each of the one or more candidates to verify whether the display device is capable of displaying the video signal; A video display control device characterized by:

2. 2. The video display control device according to claim 1, presenting a plurality of options for video output settings to the user, and outputting a video signal based on a video output setting selected by the user from the plurality of options to the display device; When presenting the plurality of options, the user is restricted from selecting a predetermined video output setting that has not been verified as being the video output setting that the display device can display. A video display control device characterized by:

3. 3. The video display control device according to claim 2, the one or more processors: recording flag information indicating whether verification has been performed on the display device; and restricting the user from selecting the predetermined video output setting when it is determined that the verification has not been performed by referring to the flag information. A video display control device characterized by:

4. 2. The video display control device according to claim 1, the one or more processors: extracting candidates for the video output setting based on information provided by the display device; A video display control device characterized by:

5. 2. The video display control device according to claim 1, the one or more processors: A setting for outputting a video signal using a variable refresh rate system is extracted from among candidates for a predetermined rate range, the setting varying the refresh rate within a usage rate range included in a range of refresh rates that can be displayed by the display device, as a candidate for a video output setting that can be displayed by the display device; When outputting a video signal based on the candidate and verifying whether the display device is capable of displaying the video signal, the video signal based on the candidate is output while sequentially switching among a plurality of verification rates that are predetermined for the candidate. A video display control device characterized by:

6. In the video display control device according to claim 5, the plurality of verification rates determined for the candidate video output settings include at least a maximum refresh rate and a minimum refresh rate in a range of usage rates corresponding to the candidate video output settings; A video display control device characterized by:

7. A control method for a video display control device connected to a display device, comprising: the display device extracts one or more displayable video output setting candidates based on the contents of the video output setting previously set by a user; outputting a video signal based on the video output setting of each of the one or more candidates to verify whether the display device is capable of displaying the video signal; A control method for a video display control device comprising:

8. A program for controlling a video display control device connected to a display device, the display device extracts one or more displayable video output setting candidates based on the contents of the video output setting previously set by a user; outputting a video signal based on the video output setting of each of the one or more candidates to verify whether the display device is capable of displaying the video signal; A program for causing the video display control device to execute the process.

Images