Display device, control method thereof, and program

Abstract

To reduce, in a display unit, a phenomenon in which a result of analysis of a video signal after calibration is displayed.SOLUTION: A display unit comprises: an input unit to which a video signal is input; a conversion unit that performs gradation conversion of the video signal; an analysis unit that analyzes the video signal; a display unit that displays a result of the analysis of the video signal performed by the analysis unit; a specification unit that specifies a correspondence relationship between conversion data used by the conversion unit to perform the gradation conversion of the video signal and the video signal before the gradation conversion performed by the conversion unit or the video signal after the gradation conversion performed by the conversion unit; and a selection unit that, on the basis of, the correspondence relationship specified by the specification unit, selects the video signal before the gradation conversion performed by the conversion unit or the video signal after the gradation conversion performed by the conversion unit, and sends the selected video signal to the analysis unit.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The technology disclosed herein relates to a display device, a control method for a display device, and a program. [Background technology]

[0002] In video production, display devices that analyze video and convert pixel values ​​using a look-up table (LUT) are in practical use. Here, waveform monitors and vectorscopes that analyze the brightness and color of a video signal and display the results in a graph are known as video analysis means. In addition, in some cases, the display device converts the input pixel value to an output pixel value according to the settings when the video signal is input, based on a preset correspondence between the input pixel value and the output pixel value of the video signal, thereby achieving image quality adjustment.

[0003] Patent Document 1 discloses a technique for displaying image data before and after white balance adjustment as thumbnails in a distinguishable form. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 3745057 Summary of the Invention [Problem to be solved by the invention]

[0005] Consider the case where the LUT is used to calibrate a display device. Calibration here refers to correcting variations in the transmittance of the liquid crystal panel that constitutes the display device and the brightness of the LEDs (Light Emitting Diodes) due to manufacturing errors and deterioration. When data for correcting the variations (calibration data) is written into the LUT and a video signal corrected by the LUT is analyzed and displayed on a waveform monitor, the analysis result of the calibrated video signal is displayed on the waveform monitor, not the input video signal.

[0006] Patent Document 1 discloses a technique for displaying image data before and after white balance adjustment on a waveform monitor in a manner that allows them to be distinguished from each other. However, since it does not take into consideration whether the data set in the LUT is due to calibration, even in this case, the analysis result after correction by calibration is displayed on the waveform monitor.

[0007] The above problem can also occur when performing calibration using image quality correction means other than the LUT. In other words, when using an image quality correction means for calibration correction and displaying the analysis result of the corrected video signal on a waveform monitor, the analysis result displayed on the waveform monitor is dependent on the correction by the calibration.

[0008] Therefore, an object of the technology disclosed in the present application is to suppress the phenomenon in which the analysis result of a video signal after calibration is displayed on a display device. [Means for solving the problem]

[0009] The present disclosure relates to an input unit to which a video signal is input; A conversion unit that performs gradation conversion of the video signal; 、 before Conversion data used by the conversion unit to perform gradation conversion of the video signal. Every A correspondence relationship between the image signal before the gradation conversion by the conversion unit or the image signal after the gradation conversion by the conversion unit is setting do setting Department and The conversion data used in the conversion unit; The above setting By department setting The correspondence relationship And base Based on A video signal before the gradation conversion by the conversion unit or a video signal after the gradation conversion by the conversion unit Analysis Department and a display unit that displays a result of the analysis of the video signal by the analysis unit; The display device includes 。

[0010] The present disclosure also provides A method for controlling a display device, comprising: Conversion data used by the conversion unit of the display device for gradation conversion of a video signal Every A correspondence relationship between the image signal before the gradation conversion by the conversion unit or the image signal after the gradation conversion by the conversion unit is setting and The conversion data used in the conversion unit; The above setting By the steps setting The correspondence relationship And base Based on A video signal before the gradation conversion by the conversion unit or a video signal after the gradation conversion by the conversion unit Analyze Steps and The above analysis Steps to take by The above displaying an analysis result of the video signal; Includes Display device Includes control method 。 Ma The present disclosure also includes a program for causing a computer to execute the above-described control method for a display device. Effect of the Invention

[0011] According to the technique disclosed herein, it is possible to reduce the phenomenon in which the analysis result of a video signal after calibration is displayed on a display device. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a block diagram showing a schematic configuration of a display device according to a first embodiment; [Diagram 2] An example of LUT data stored in the display device according to the first embodiment. [Diagram 3] 1 is an example of a flowchart of a process executed by the display device according to the first embodiment. [Figure 4] 11 is another example of a flowchart of the process executed by the display device according to the first embodiment. [Diagram 5]FIG. 11 is a block diagram showing a schematic configuration of a display device according to a second embodiment. [Figure 6] FIG. 11 is a block diagram showing an example of a connection between a display device according to a second embodiment and an external device. [Figure 7] An example of selection settings stored in the display device according to the second embodiment [Figure 8] 13 is an example of a flowchart of a process executed by a display device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The same or equivalent components, members, and processes shown in each drawing will be given the same reference numerals, and duplicated descriptions will be omitted as appropriate. Also, some of the components, members, and processes will be omitted in each drawing.

[0014] In a display device having an analysis unit for a video signal, a display unit for displaying the analysis results, and a storage unit for LUT (Look Up Table) data, the display unit is a combination of a liquid crystal panel and a backlight, or an organic EL (Electroluminescence) panel. The display device may be a waveform monitor, a vectorscope, or a device capable of displaying various images, for example, a screen (image; graph) such as a waveform monitor or a vectorscope on an OSD. In addition, for example, a 1DLUT (1Dimentional Look Up Table) and a 3DLUT are used as the LUT. The 1DLUT is a table in which input pixel values ​​and output pixel values ​​are associated with each other for each color (for example, red, green, or blue). In addition, the 3DLUT is a table in which a set of input pixel values ​​of three colors, red, green, and blue, is associated with a set of output pixel values ​​of the three colors.

[0015] In the display device of this embodiment, the transmittance of the display unit and the LED (Light Emitting Diode) used in the display unit are Calibration is performed to correct display characteristics such as the brightness of the LEDs using an LUT. For calibration, calibration software is executed in a PC (Personal Computer) connected to the display device. The display device writes the calibration data generated by the calibration software into the LUT via an interface such as a LAN (Local Area Network), and stores the LUT in a memory unit.

[0016] When the analysis result of the video signal is displayed on the display unit in the display format of, for example, a waveform monitor with the calibration data written in the LUT, the analysis result that depends on the correction by the calibration is displayed on the display unit. Since the waveform monitor is originally intended to display the analysis result of the characteristics of the video signal itself input to the device, it is not preferable for the analysis result of the video signal after the calibration to be displayed in the display format of the waveform monitor. Therefore, it is conceivable that the user of the display device manually switches between analyzing and displaying the data before LUT processing or the data after LUT processing on the waveform monitor based on the type of data written in the LUT. However, in this case, the user's operation may become complicated.

[0017] Therefore, in this embodiment, the display device uses a process for converting the characteristics of a video signal. Depending on the LUT data to be displayed, the display device switches between displaying the analysis result of the video signal before processing or displaying the analysis result of the video signal after processing. This reduces the phenomenon in which the analysis result of the video signal after calibration is displayed on a waveform monitor in the display device.

[0018] (First embodiment) 1 is a block diagram showing a schematic configuration of a display device according to embodiment 1. The display device 1 includes an input unit 101, an LUT processing unit 102, an image processing unit 103, a synthesis unit 104, a display unit 105, a control unit 110, a selection unit 111, an analysis unit 112, a drawing unit 113, a storage unit 121, and an OSD generation unit 131.

[0019] The input unit 101 receives a video signal from outside the display device 1, and converts the video signal into an internal format suitable for processing within the display device 1, which will be described below. The format of the video signal received from outside is, for example, SDI (Serial Digital Interface).

[0020] The storage unit 121 stores LUT data. Here, the LUT data is an example of conversion data used to perform gradation conversion of a video signal. Although 1DLUT or 3DLUT is assumed as the LUT data stored in the storage unit 121, the LUT data used in this embodiment is not limited to these. In the display device, a user of the display device selects LUT data from a plurality of LUT data stored in the storage unit 121, and the selected LUT data is read out from the storage unit 121 and sent to the LUT processing unit 102. The user of the display device 1 selects LUT data using the OSD generated by the OSD generation unit 131 and an operation unit (not shown).

[0021] The LUT processing unit 102 is composed of a memory such as a static random access memory (SRAM), and writes the LUT data read from the storage unit 121 into the memory. Furthermore, the LUT processing unit 102 functions as a conversion unit that performs gradation conversion of the video signal, and converts the input pixel values ​​of the video signal into output pixel values ​​using the LUT data, which is 1DLUT or 3DLUT, written into the memory.

[0022] The video processor 103 performs IP (Interlace to Progressive) conversion processing and enlargement / reduction processing. Furthermore, the OSD generator 131 generates an OSD (On Screen Display) for the user to operate the display device.

[0023] The selection unit 111 selects the video signal output from the input unit 101 or the video signal output from the LUT processing unit 102, and sends the selected video signal to the downstream analysis unit 112. The video signal output from the input unit 101 is a video signal that has not been processed by the LUT processing unit 102 using the LUT. On the other hand, the video signal output from the LUT processing unit 102 is a video signal that has been processed by the LUT processing unit 102 using the LUT. The analysis unit 112 receives and analyzes the video signal selected by the selection unit 111, and generates information indicating a luminance distribution or a color distribution based on the feature amounts of brightness and color. Furthermore, the drawing unit 113 generates a graph indicating a luminance distribution or a color distribution of the video signal based on the analysis result of the analysis unit 112.

[0024] The synthesis unit 104 generates an image by synthesizing the image output by the image processing unit 103, the OSD (On Screen Display) output by the OSD generation unit 131, and the graph output by the drawing unit 113. The display unit 105 is composed of a liquid crystal panel and a backlight, and displays the image synthesized by the synthesis unit 104. In this embodiment, the display unit 105 can display the analysis result of the analysis unit 112 in the form of a waveform monitor or a vectorscope.

[0025] The control unit 110 controls the operations of the above-mentioned components of the display device 1, which is a computer, and is responsible for executing processes in the display device 1, which will be described later.

[0026] The input unit 101, the LUT processing unit 102, the video processing unit 103, the synthesis unit 104, the control unit 110, the selection unit 111, the analysis unit 112, the drawing unit 113, the storage unit 121, and the OSD generation unit 131 are configured as electronic circuits. The functions of these units may be realized using an ASIC (Application Specified Integrated Circuit) or an FPGA (Field Programmable Gate Array).

[0027] (Processing to store LUT data) FIG. 2 shows an example of setting information of LUT data stored in the storage unit 121 of the display device 1 according to this embodiment. In the figure, "name" is a character string used for displaying on the OSD when the user makes a selection, and is an arbitrary character string representing the characteristics of the LUT data. Also, in the figure, "acquisition setting" is a parameter related to the control of the selection unit 111, and is a value of "before" or "after" in this embodiment. Also, the acquisition setting is an example of a correspondence relationship between conversion data used to perform gradation conversion of a video signal and a video signal before gradation conversion or a video signal after gradation conversion. Details of the parameters of the acquisition setting will be described later. Also, it is assumed that the LUT data is stored in advance in the storage unit 121 at the time of manufacturing the display device 1, but the display device 1 may acquire LUT data from the outside during operation and store it in the storage unit 121.

[0028] When the LUT data is stored in advance in the storage unit 121, if the LUT data is used for calibration, the parameters set in the "acquisition setting" are "before". If the LUT data is not used for calibration, the parameters set in the "acquisition setting" are "after".

[0029] In one form in which the display device 1 acquires LUT data from an external source, the user of the display device 1 specifies parameters using the OSD generated by the OSD generation unit 131 and an operation unit (not shown). The OSD may display a list of names of LUT data stored in the storage unit 121, acquisition settings, etc., and the user may specify parameters from the list. This allows the correspondence between the LUT data and parameters to be stored in the storage unit 121, and the display device 1 can generate and display analysis results of the video signal based on the correspondence. Therefore, after the user specifies the parameters, there is no need to perform complicated operations such as switching the analysis display.

[0030] Alternatively, in another embodiment in which the display device 1 acquires LUT data from an external device, the display device 1 specifies the acquisition setting depending on whether the LUT data is for calibration or not. In the following description, the distinction between whether the LUT data is for calibration or not is referred to as a data type.

[0031] The display device 1 can be connected to an external PC via a LAN connection unit (not shown). Calibration software runs on the external PC, and the calibration software transmits LUT data to the display device 1. The display device 1 can also be connected to an external USB memory (a storage device conforming to the Mass Storage Class) via a USB (Universal Serial Bus) connection unit (not shown). The display device 1 reads the LUT data stored in the connected USB memory.

[0032] In this embodiment, the control unit 110 of the display device 1 functions as an identifying unit, and when acquiring LUT data via a LAN connection unit, the control unit 110 considers the LUT data to be data generated by calibration software. Then, the control unit 110 identifies the data type of the LUT data as data for calibration. When LUT data is acquired via a USB connection unit, the control unit 110 considers that the LUT data is not data generated by calibration software. Then, the control unit 110 specifies the data type of the LUT data as not for calibration. In this way, when there are multiple acquisition paths for LUT data in the display device 1, if the acquisition path for the LUT data is a predetermined acquisition path (via LAN in this case), the data type of the LUT data can be specified as for calibration. Note that the predetermined acquisition path for specifying the data type of the LUT data as for calibration is not limited to LAN, but may be USB, or other types of acquisition paths may be adopted.

[0033] The method of identifying the data type of the LUT data is not limited to the above. For example, information indicating the data type may be added to the LUT data stored in the USB memory, and the display device 1 may identify the data type of the LUT data acquired via the USB connection unit based on the information added to the LUT data.

[0034] In addition, the display device 1 is connected to a LAN using a file format transmission method (e.g., File When acquiring LUT data using the File Transfer Protocol (FTP), the control unit 110 can identify the data type of the LUT data from the file name. For example, if the file name of the LUT data is "calibration.cube", the file name contains a character string indicating calibration ("calibration"). Therefore, the control unit 110 identifies that the acquired LUT data is for calibration. In contrast, for example, if the file name of the LUT data is "2020_to_709.cube", the file name does not contain a character string indicating calibration. Therefore, the control unit 110 identifies that the acquired LUT data is not for calibration. The file name of the LUT data can also be used as the "name" of the LUT data exemplified in FIG. 2.

[0035] Furthermore, when the display device 1 acquires LUT data using a command-format transmission method in a LAN connection, the control unit 110 can identify the data type of the LUT data based on the format of the command. For example, by defining a calibration command and a general-purpose LUT data command in advance, the control unit 110 can identify the data type of the acquired LUT data based on the type of command used when the LUT data is transmitted to the display device.

[0036] Alternatively, the control unit 110 of the display device 1 may function as a determination unit and determine the data type by analyzing the characteristics of the acquired LUT data. For example, when the LUT data is 1DLUT, if the acquired LUT data is the same for each color (e.g., red, green, and blue), the control unit 110 determines that the data type of the LUT data is not for calibration. Also, if the acquired LUT data is different for each color (e.g., red, green, and blue), the control unit 110 determines that the data type of the LUT data is for calibration.

[0037] 3 is a flowchart showing an example of a process in which the display device 1 according to the present embodiment determines acquisition settings based on the data type of LUT data. The display device 1 realizes the following process by the control unit 110 expanding and executing a program stored in the storage unit 121.

[0038] First, in S101, the control unit 110 acquires LUT data from the outside as described above. Next, in S102, the control unit 110 identifies the data type of the LUT data acquired in S101. Any of the above methods may be used to identify the data type of the LUT data. Then, the control unit 110 determines whether the data type of the LUT data is the same as the calibration data. If the data type of the LUT data is for calibration (S102: Yes), the control unit 110 advances the process to S103. On the other hand, if the data type of the LUT data is not for calibration (S102: No), the control unit 110 advances the process to S104.

[0039] In S103, the control unit 110 sets the acquisition setting included in the setting information of the LUT data stored in the storage unit 121 to "before." On the other hand, in S104, the control unit 110 sets the acquisition setting included in the setting information of the LUT data stored in the storage unit 121 to "after." After executing the process of S103 or S104, the control unit 110 ends the process of this flowchart.

[0040] Through the above-described processing, in the display device 1, for each piece of LUT data acquired from the outside, setting information that associates the LUT data with a name and acquisition setting parameters is stored in the storage unit 121.

[0041] (Video signal analysis display) Next, a process of analyzing and displaying a video signal based on the LUT data acquired by the above process and the setting information generated in the display device 1 will be described. FIG. 4 is a flowchart of the process of analyzing and displaying a video signal executed by the control unit 110 of the display device 1. In S111, the control unit 110 acquires LUT data used for processing the video signal by the LUT processing unit 102. Specifically, the user of the display device 1 designates the LUT data to be used using the OSD generated by the OSD generating unit 131 displayed on the display unit 105 and an operation unit (not shown). The control unit 110 acquires the LUT data designated by the user and transmits it to the LUT processing unit 102. Next, in S112, the control unit 110 identifies the acquisition setting corresponding to the LUT data acquired in S111 from among the acquisition settings stored in the storage unit 121.

[0042] Next, in S113, the control unit 110 sets the selection of the video signal by the selection unit 111 according to the acquisition setting identified in S112. Specifically, when the acquisition setting of the setting information of the specified LUT data is "before", the control unit 110 sets the selection by the selection unit 111 so that the selection unit 111 selects the output of the input unit 101. As a result, in S114, the output of the input unit 101 is input to the analysis unit 112, and the analysis unit 112 analyzes the video signal that has not been processed by the LUT processing unit 102. Then, the analysis result by the analysis unit 112 is synthesized with the video by the synthesis unit 104, and the synthesized video is displayed on the display unit 105.

[0043] On the other hand, when the acquisition setting of the setting information of the specified LUT data is "later", the control unit 110 sets the selection by the selection unit 111 so that the selection unit 111 selects the output of the LUT processing unit 102. As a result, in S114, the output of the LUT processing unit 102 is input to the analysis unit 112, and the analysis unit 112 analyzes the video signal processed by the LUT processing unit 102. Then, the analysis result by the analysis unit 112 is synthesized with the video by the synthesis unit 104, and the synthesized video is displayed on the display unit 105.

[0044] According to this embodiment, in the display device 1, when the LUT data is LUT data for calibration, the analysis result of the video signal before signal processing for calibration using the LUT data is performed can be displayed. In addition, in the display device 1, when the LUT data is not LUT data for calibration, the analysis result of the video signal after signal processing using the LUT data is performed can be displayed. This makes it possible for the display device 1 to prevent the analysis result of the video signal that has been subjected to signal processing for calibration from being displayed. Also, by displaying the analysis result of the video signal input to the video processing unit 103 located after the LUT processing unit 102, the display unit 10 can display a higher quality image than the video signal input to the input unit 101. It is possible to display analysis results of the video signal that more accurately reflect the image displayed on the LCD monitor.

[0045] In the above description, it is assumed that the LUT data is used to calibrate the video signal, but the present embodiment can also be applied to calibration using data other than the LUT data. The above configuration and processing can be applied even when performing calibration according to the Society of Cinematographers Color Decision List.

[0046] Second embodiment Next, a display device according to a second embodiment will be described. In the second embodiment, a part of the configuration of the display device 1 according to the first embodiment is changed. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0047] Fig. 5 is a block diagram showing a schematic configuration of a display device 2 according to a second embodiment. The schematic configuration of the display device 2 will be described with reference to Fig. 5. The display device 2 is composed of input units 401 and 402, a video processing unit 103, a synthesis unit 104, a display unit 105, a control unit 410, a selection unit 411 and 412, an analysis unit 112, a drawing unit 113, a storage unit 421, and an OSD generation unit 131. The control unit 410 controls the operation of each unit of the display device 2, and is responsible for the execution of processes in the display device 2, which will be described later.

[0048] The input units 401 and 402 receive video signals from outside the display device 2 and convert the video signals into an internal format suitable for processing within the display device 2, which will be described below. The input units 401 and 402 each receive different video signals. In the following description, the input unit 401 may be referred to as Input A, and the input unit 402 may be referred to as Input B.

[0049] The selection unit 411 selects the video signal output from the input unit 401 (signal derived from InputA) or the video signal output from the input unit 402 (signal derived from InputB) and outputs it to the downstream video processing unit 103. Similarly, the selection unit 412 selects the signal output from the input unit 401 (signal derived from InputA) or the video signal output from the input unit 402 (signal derived from InputB) and outputs it to the downstream analysis unit 112.

[0050] Furthermore, the storage unit 421 stores setting information including selection settings related to the selection of video signals by the selection units 411 and 412. The setting information stored in the storage unit 421 will be described in detail later.

[0051] The input units 401 and 402, the control unit 410, the selection units 411 and 412, and the storage unit 421 are configured as electronic circuits. The functions of these units may be realized using ASIC or FPGA. Note that the image processing unit 103, the synthesis unit 104, the display unit 105, the analysis unit 112, the drawing unit 113, and the OSD generation unit 131 are the same as those in the first embodiment, and therefore detailed description thereof will be omitted here.

[0052] FIG. 6 is a block diagram showing an example of a connection between the display device 2 and an external device in the second embodiment.

[0053] 6, the image generating device 501 generates an image signal to be processed by the display device 2. Examples of the image generating device 501 include an image capturing device that captures an image of a subject to generate an image signal, and a playback device that plays back an image captured in advance to generate an image signal. The LUT processing device 502 is a signal processing device that performs LUT processing on the image signal input from the image generating device 501 and outputs the processed image signal.

[0054] The video signal generated by the video generation device 501 is input to the LUT processing device 502, which performs LUT processing on the video signal. The video signal after LUT processing is then input to the input unit 401 (Input A) of the display device 2. Furthermore, the video signal generated by the video generation device 501 is also input to the input unit 402 (Input B) of the display device 2. As a result, a video signal reflecting the LUT processing by the LUT processing unit 502 is input to the input unit 401 of the display device 2. Furthermore, a video signal not reflecting the LUT processing by the LUT processing device 502 is input to the display device 402.

[0055] FIG. 7 shows an example of setting information stored in the storage unit 421 of the display device 2 in the second embodiment. In FIG. 7, "name" is an arbitrary character string for distinguishing each setting stored in the storage unit 421. The character string of "name" is displayed on the OSD of the display unit 105 when the user selects a setting. In FIG. 7, "display terminal" indicates a terminal used for video display, and more specifically indicates from which of the input units 401 and 402 the selection unit 411 receives a video signal. Furthermore, "analysis terminal" indicates a terminal used for video analysis, and more specifically indicates from which of the input units 401 and 402 the selection unit 412 receives a video signal.

[0056] FIG. 8 shows an example of a flowchart of the process executed by the control unit 410 in this embodiment. In S201, the control unit 410 specifies a selection setting related to the selection of a video signal by the selection units 411 and 412. Specifically, the user of the display device 2 specifies the selection setting using the OSD generated by the OSD generation unit 131 and an operation unit (not shown). The setting information stored in the storage unit 421 and shown in FIG. 6 may be displayed in a list on the OSD. In addition, the user specifies "setting 1" when the LUT data used for processing a video signal in the LUT processing device 502 is not for calibration, and specifies "setting 2" when the LUT data is for calibration. The control unit 410 of the display device 2 specifies a selection setting related to the selection of a video signal by the selection units 411 and 412 based on the user's specification.

[0057] Next, in S202, the control unit 410 controls the selection of the video signal by the selection units 411 and 412 based on the selection setting specified in S201, and sends the selected video signal to the analysis unit 112. For example, when the selection settings shown in FIG. 6 are stored in the storage unit 421, if the user specifies the selection setting named "Setting 1", the selection units 411 and 412 each select a video signal output from the input unit 401 (Input A). In this case, since the video signal processed by the video signal generation unit 501 via the LUT processing unit 502 is input to the input unit 401, the analysis unit 112 generates an analysis result of the video signal converted by the LUT processing unit 502. Then, the analysis result by the analysis unit 112 is synthesized with the video by the synthesis unit 104, and the synthesized video is displayed on the display unit 105 (S203).

[0058] On the other hand, for example, if the user specifies a selection setting named "Setting 2", the selection unit 411 selects the video signal output from the input unit 401 (Input A), and the selection unit 412 selects the video signal output from the input unit 402 (Input B). In this case, since the video signal from the video signal generation unit 501 that does not pass through the LUT processing device 502 is input to the input unit 402, the analysis unit 112 generates an analysis result of the video signal that has not been subjected to conversion processing by the LUT processing device 502. Then, the analysis result by the analysis unit 112 is synthesized with the video by the synthesis unit 104, and the synthesized video is displayed on the display unit 105 (S203).

[0059] As a result, in the display device 2, when the LUT data used for processing the video signal in the LUT processing device 502 is for calibration, the analysis result of the video signal that has not been processed using the LUT data can be displayed. Also, in the display device 2, when the LUT data used for processing the video signal in the LUT processing device 502 is not for calibration, the analysis result of the video signal that has been processed using the LUT data can be displayed.

[0060] Although preferred embodiments of the technology disclosed herein have been described above, the technology disclosed herein is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist thereof.

[0061] For example, in the above embodiment, the user specifies the selection setting of the video signal by the selection unit, but the display device may automatically specify the selection setting. For example, in the second embodiment, when the data type of the LUT data used in the LUT processing device 502 is not for calibration, the control unit 410 of the display device 2 sets the analysis terminal to the same terminal as the display terminal. That is, the type of the LUT data of the LUT processing device 502 can be notified to the display device 503 from the LUT processing device 502. For example, there is a method in which the LUT processing device 502 superimposes the data type on the ANC Data (Ancillary Data) of SDI, and the display device 503 acquires it. In this case, the display device 503 monitors the ANC Data, and when it detects that the superimposed type has changed, it switches the analysis terminal. Thereby, the control unit 410 can control the selection of the video signal of the selection units 411 and 412 based on the information indicating whether the video processing device calibrates the characteristics of the video signal and the specified selection setting. [Explanation of symbols]

[0062] 1: Display device 101: Input unit 102: LUT processing unit 111: Selection unit 112: Analysis unit 121: Storage unit

Claims

1. an input unit to which a video signal is input; A conversion unit that performs gradation conversion of the video signal; a setting unit that sets a correspondence relationship between the conversion data used by the conversion unit to perform gradation conversion of the video signal and the video signal before gradation conversion by the conversion unit or the video signal after gradation conversion by the conversion unit; an analysis unit that analyzes a video signal before a tone conversion by the conversion unit or a video signal after a tone conversion by the conversion unit based on the conversion data used in the conversion unit and the correspondence relationship set by the setting unit; a display unit that displays a result of the analysis of the video signal by the analysis unit; A display device comprising:

2. The display device according to claim 1, characterized in that, when the conversion data is used for calibrating the image display by the display device, the setting unit sets the correspondence relationship so that the conversion data corresponds to the image signal before gradation conversion by the conversion unit.

3. The conversion data is generated by an external device of the display device. Table) data, The display device according to claim 1, characterized in that, when the route by which the display device obtains the converted data is a predetermined route among a plurality of routes, the setting unit sets the correspondence relationship so that the converted data corresponds to the video signal before gradation conversion by the conversion unit.

4. the conversion data includes information indicating whether the conversion data is used for calibration of an image displayed by the display device; The display device according to claim 1 , wherein the setting section sets the correspondence relationship based on the information.

5. 5. The table according to claim 4, wherein the information is a file name of the converted data. display device.

6. 5. The display device according to claim 4, wherein the information is a type of a command used when the converted data is transmitted to the display device.

7. a determination unit that determines whether or not the converted data is used for calibration of an image displayed by the display device based on a characteristic of the converted data; The display device according to claim 1 , wherein the setting section sets the correspondence relationship based on the determination by the determination section.

8. 8. The display device according to claim 1, wherein the analysis section generates information indicating a luminance distribution or a color distribution of a video signal as the analysis result.

9. 9. The display device according to claim 1, wherein the display unit displays the analysis results in the form of a waveform monitor or a vectorscope.

10. A method for controlling a display device, comprising: setting a correspondence relationship between the conversion data used by a conversion unit of the display device for tone conversion of a video signal and a video signal before tone conversion by the conversion unit or a video signal after tone conversion by the conversion unit; analyzing a video signal before gradation conversion by the conversion unit or a video signal after gradation conversion by the conversion unit based on the conversion data used in the conversion unit and the correspondence relationship set by the setting step; displaying an analysis result of the video signal obtained by the analyzing step; A method for controlling a display device comprising:

11. A program for causing a computer to execute the control method for a display device according to claim 10.

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