Display device, system, display device control method, program, recording medium, and video output method

Abstract

To provide a display device or the like capable of outputting video in accordance with appropriate display capabilities even for devices that comply with different standards.SOLUTION: A display device to which another device is connected in compliance with the HDMI standard includes a memory unit that stores first information including one or more pieces of information on video formats that the display device can display, a receiving unit that receives second information including one or more pieces of information on video formats that the display device can display from the other device, and a control unit, and when the first information and the second information differ, the control unit changes the first information to information that the other device can process and stores the first information.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present disclosure relates to a display device and the like.

Background Art

[0002] For example, as shown in Patent Document 1, a system including a source device, a sink device, and a repeater device is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] One object of the present disclosure is to provide a display device or the like that can output an image according to appropriate display capabilities even for devices corresponding to different standards.

Means for Solving the Problems

[0005] The display device of the present disclosure includes a storage unit that stores first information including one or more pieces of information on video formats that can be displayed by the display device in a display device to which another device is connected in accordance with the HDMI standard, a reception unit that receives second information including one or more pieces of information on video formats that can be displayed by the display device from the other device, and a control unit. When the first information and the second information are different, the control unit changes the information to information that can be processed by the other device and stores the first information.

[0006] The display device of the present disclosure is a display device to which another device is connected in accordance with the HDMI standard, and includes a storage unit that stores first information including one or more pieces of information on video formats that the display device can display, a reception unit that receives second information including one or more pieces of information on video formats that the display device can display from the other device, and a control unit. The information on the video formats that the display device can display includes information on video formats conforming to a first standard of the HDMI standard and information on video formats conforming to a second standard that is newer than the first standard of the HDMI standard. When the other device can only use information on video formats conforming to the first standard, the control unit converts the format information conforming to the second standard into information in the form of video formats conforming to the first standard.

[0007] The system of the present disclosure is a system in which a sink device and a source device can be connected via a repeater device in accordance with the HDMI standard. The sink device stores first information including one or more pieces of information on video formats that the sink device can display. The repeater device reads the first information from the sink device and stores, as second information, information on video formats that can be stored in the repeater device. The sink device reads the second information from the repeater device, and when the size of the second information is smaller than that of the first information, selects a video format so that the size is the size that the repeater device can store as the second information, and stores it again as the first information. The repeater device reads the first information from the sink device again and stores it as the second information. The source device reads the second information from the repeater device, selects a video format that can be output as the highest resolution from the video formats included in the second information, and outputs a video.

[0008] The control method of the present disclosure is a control method for a display device to which another device is connected in accordance with the HDMI standard, and includes a step of storing first information including one or more pieces of information on video formats that the display device can display; a step of receiving second information including one or more pieces of information on video formats that the display device can display from the other device; and a step of changing the first information to information that the other device can process and storing the first information when the first information and the second information are different.

[0009] The program of the present disclosure is a program executed on a computer to which another device is connected in accordance with the HDMI standard, and includes a function of storing first information including one or more pieces of information on video formats that the display device can display; a function of receiving second information including one or more pieces of information on video formats that the display device can display from the other device; and a function of changing the first information to information that the other device can process and storing the first information when the first information and the second information are different.

[0010] The video output method of the present disclosure is a video output method in a system in which a sink device and a source device can be connected via a repeater device in accordance with the HDMI standard. The sink device stores first information including one or more pieces of information on video formats that the sink device can display. The relay device reads the first information from the sink device and stores information on video formats that can be stored in the relay device as second information. The sink device reads the second information from the relay device, and when the size of the second information is smaller than the first information, selects a video format so that the size is a size that can be stored as the second information by the relay device and stores it as the first information again. The relay device reads the first information from the sink device again and stores it as the second information. The source device reads the second information from the relay device, selects a video format that can be output as the highest resolution from among the video formats included in the second information, and outputs the video.

Advantages of the Invention

[0011] According to the present disclosure, for example, even for devices connected with different HDMI standards, it is possible to provide a display device or the like that can output video according to appropriate display capabilities.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Modes for Carrying Out the Invention

[0013] A source device is connected to a sink device (for example, a display device) that outputs video, and the source device outputs video based on the resolution that can be displayed. The source device is connected to, for example, a game device or a video playback device (for example, a Blu-ray player, an HDD recorder, etc.).

[0014] Also, a repeater device (e.g., an amplifier device, a soundbar device, etc.) may be connected between the sink device and the source device. At this time, the sink device can switch and output the displayable video resolution according to the output from the source device. The sink device can provide information regarding the video format corresponding to the displayable video resolution to other devices as capability information (e.g., EDID (Extended Display Identification Data)). Also, the source device can acquire the EDID, which is the capability information, from the sink device and select the video resolution with the highest image quality and highest resolution among the displayable video resolutions.

[0015] Here, the capability information differs in, for example, the number of video formats that can be stored according to the HDMI (Registered Trademark) (High-Definition Multimedia Interface) standard and the data format. For example, in an HDMI 1.4 device, the number of blocks that can store video formats is two, but in an HDMI 2.1 device, the number of blocks that can store video formats may be three or more. Here, the EDID is generally configured with 128 bytes as one block.

[0016] Then, for example, even if both the sink device and the source device are connected in accordance with a first standard (e.g., HDMI 2.1), if the repeater device connected between them is a device corresponding to a second standard (e.g., HDMI 1.4) older than the first standard, the EDID information based on the first standard may not be properly stored or interpreted. As a result, there has been a problem that high-quality and high-resolution video that could originally be used in the sink device or the source device cannot be output.

[0017] In addition, in the EDID, the data formats for describing the video format are different between the new format compliant with the first standard and the old format compliant with the second standard (for example, the video format according to the HDMI standard). Therefore, although there is a video format that can originally be output by the sink device and the source device (for example, a high-resolution video format capable of outputting video in the sink device as the source device), due to the difference in the data formats of the video formats for each device, there has been a problem that high-quality and high-resolution video cannot be output from the source device to the sink device.

[0018] Hereinafter, the display device and the like of the present disclosure that solve the above-described problems will be described in the following embodiments with reference to the drawings. Note that the following embodiments illustrate the invention described in the claims as an example, and the technical scope of the present invention is not limited to the description of the following embodiments.

[0019] [1. First Embodiment] [1.1 Overall Configuration] FIG. 1 is a diagram for explaining an overview of a system 1 to which the display device of the present disclosure can be applied. In the system 1, a display device 10 as a sink device and a game device 30 as a source device are connected via HDMI (registered trademark) (High-Definition Multimedia Interface). Further, an amplifier device 20 may be connected as a repeater device between the display device 10 and the game device 30.

[0020] The display device 10 is, for example, a television that can receive content via digital broadcasting (terrestrial digital broadcasting / BS broadcasting / CS broadcasting) or the like and display the received content. The display device 10 may display interactive broadcasts distributed on the network or video content distributed on a video distribution site. In addition, the display device 10 can record the received content. Further, the display device 10 can output a video signal and an audio signal input from the connected device, and may output an audio signal to the connected device.

[0021] The game device 30 can output video and audio to the display device 10. At this time, the game device 30 can specify a video format including the resolution at which the display device 10 can output video.

[0022] Video formats include, for example, resolution and refresh rate. For example, the following resolutions can be considered.

[0023] · 720p (1280 × 720 pixels (HD), progressive projection) · 1080i (1920 × 1080 pixels (FHD), interlaced projection) · 1080p (1920 × 1080 pixels (FHD), progressive projection) · 1440p (2560 × 1440 pixels (QHD), progressive projection) · 2160p (3840 × 2160 pixels (UHD), progressive projection)

[0024] Also, the following refresh rates can be considered. · 30Hz · 60Hz · 120Hz

[0025] The game device 30 preferably outputs a video signal with the highest possible resolution among these video formats. Also, the game device 30 may output a video signal with the highest possible refresh rate among these video formats. The game device 30 acquires EDID (Extended Display Identification Data), which is one of the ability information (display ability information) of the display device 10, as information regarding the video formats that the display device 10 can output. Then, based on the EDID of the display device 10, the game device 30 selects the video format with the highest resolution and highest refresh rate and outputs the video.

[0026] Note that, although the source device will be described by taking the game device 30 as an example, it may be other video output devices or content output devices. For example, it may be a recorder device capable of recording the received digital broadcast content, or a playback device capable of playing back the content recorded on an external recording medium (e.g., BD / DVD, etc.). Further, the source device may be, for example, a device such as a computer or a tablet as a video output device, or a content playback device that outputs the video of a video distribution site as a content output device.

[0027] The amplifier device 20 is a repeater device connected between the display device 10 which is a sink device and the game device 30 which is a source device. The amplifier device 20 outputs the video signal and the audio signal input from the source device to the display device 10. Further, the amplifier device 20 may output, for example, the audio signal to a speaker or the like which is a different audio output device. Further, the amplifier device 20 may output the video signal and the audio signal to a plurality of display devices and audio output devices.

[0028] Note that, in the present embodiment, the display device 10 and the game device 30 are devices compatible with HDMI 2.1 (e.g., High-Definition Multimedia Interface Specification Version 2.1b), and the amplifier device will be described as a device compatible with HDMI 1.4 (e.g., High-Definition Multimedia Interface Specification Version 1 4b).

[0029] [1.2 Hardware Configuration] Next, the hardware configuration of the devices in the present embodiment will be described. The display device 10, the amplifier device 20, and the game device 30 each include at least a control unit, a storage unit, and an interface unit. Further, each device has general functions as required.

[0030] In FIG. 2, the display device 10 will be described as an example among the display device 10, the amplifier device 20, and the game device 30.

[0031] The control unit 100 controls the entire display device 10. The control unit 100 realizes various functions by reading and executing various programs stored in a storage device (for example, the storage 110 or the ROM 120). The control unit 100 may be realized by one or more control devices / arithmetic devices (CPU (Central Processing Unit), SoC (System on a Chip)). Further, the control unit 100 may be composed of a control circuit.

[0032] The operation control unit 105 receives an operation from the user, gives an operation instruction to each functional unit, or notifies the control unit 100 of an operation signal corresponding to the received operation. For example, the operation control unit 105 may be an operation signal receiving unit from a remote control or an operation switch provided on the main body of the display device 10.

[0033] The broadcast control unit 107 receives a broadcast wave transmitted by a broadcast station selected by the user, decodes video data from the broadcast wave and outputs it to the display unit 140, and decodes audio data from the broadcast wave and outputs it to the audio output unit 155. The broadcast control unit 106 may have a configuration such as a digital tuner unit (terrestrial / BS / CS, etc.), an OFDM demodulation unit, a DEMUX unit, an MPEG2 decoding unit, etc. Further, there may be a plurality of broadcast control units 106.

[0034] The storage 110 is a non-volatile storage device capable of storing programs and data. For example, it may be composed of a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). Further, the storage 110 may have a configuration such as a USB memory that can be externally connected. Further, the storage 110 may be, for example, a storage area on the cloud.

[0035] The ROM 120 is a non-volatile memory that can retain programs and data even when the power is turned off.

[0036] The RAM 130 is the main memory mainly used by the control unit 100 when executing processes. The RAM 130 is a rewritable memory that temporarily holds data including data read from the storage 110, programs read from the ROM 120, and results during execution.

[0037] The display unit 140 is a display device capable of displaying the video of the received program and various information. The display unit 140 may be, for example, a device capable of displaying video such as a liquid crystal display (LCD; Liquid Crystal Display) or an organic EL (Organic Electro Luminescence) display. Further, the display unit 140 may be a projection device such as a projector.

[0038] The audio output unit 150 outputs the audio included in the content. The audio output unit 150 may be, for example, a device such as a speaker or headphones. Also, the audio output unit 145 only needs to output sound, and can output, for example, general sounds such as music and environmental sounds.

[0039] The interface unit 160 provides an interface for connecting to other devices. For example, the interface unit 160 of the present embodiment provides an HDMI interface.

[0040] There are multiple known HDMI specifications. For example, as HDMI specifications, there are, for example, a plurality such as 1.0, 1.4, 2.0, 2.1, etc. In the present embodiment, the first specification is the new specification HDMI 2.1, and the second specification is the old specification HDMI 1.4, which is a specification older than the first specification, as an example for explanation.

[0041] The communication unit 170 is a communication interface for communicating with other devices. For example, the communication unit 170 may be a network interface connectable to a wireless LAN, or may be a network interface connectable to Ethernet (registered trademark) by wire. Further, the communication unit 170 may be a communication device connectable to a mobile communication network such as LTE / 4G / 5G / 6G, for example.

[0042] [1.3 Software Configuration] With reference to FIG. 3, the software configuration of each device will be described. FIG. 3 shows the control unit 100 and the storage 110 of the display device 10, the control unit 200 and the storage 210 of the amplifier device 20, and the control unit 300 and the storage 310 of the game device 30.

[0043] Here, the control unit 100 realizes each function by executing programs and applications stored in a storage unit (for example, a storage, a ROM, a RAM).

[0044] Each device can realize an EDID reading unit (EDID reading unit 102, EDID reading unit 202, EDID reading unit 302) and an EDID setting unit (EDID setting unit 104, EDID setting unit 204, EDID setting unit 304) by a control unit (control unit 100, control unit 200, control unit 300).

[0045] For example, taking the amplifier device 20 as an example, the EDID reading unit 202 can read the EDID stored in the EDID storage area (for example, the EDID storage area 112 of the display device 10) from another device via the interface unit 160. Further, the EDID setting unit 204 stores the read EDID in the EDID storage area 212 of the storage 210.

[0046] The EDID of the display device 10 stored in the EDID storage area 212 is read by the EDID reading unit 302 in the game device 30. Then, the EDID setting unit 304 stores the read EDID (the EDID of the display device 10) in the EDID storage area 312 of the storage 310.

[0047] Here, the EDID storage area can store a plurality of Blocks that store video formats. For example, the display device 10 of the present embodiment is a device compatible with HDMI 2.1, and the video formats (EDID) included in the EDID can store three or more Blocks (three Blocks as an example in the figure). Further, since the amplifier device 20 of the present embodiment is a device compatible with HDMI 1.4, the video formats (EDID) included in the EDIE can store two Blocks.

[0048] Note that since the game device 30 is a device compatible with HDMI 2.1, the EDID storage area can originally store the EDID in three or more Blocks. In FIG. 3, since the EDID read from the amplifier device 20 is stored, the EDID for two Blocks is stored.

[0049] That is, originally, three video formats are stored as the EDID in the display device 10, but only two video formats can be stored due to passing through the amplifier device 20. Further, since the EDID storage area 312 only needs to store the video format output by the game device 30, only one video format may be stored. Even in this case, the game device 30 acquires the EDID of the display device 10 stored in the amplifier device 20, but since the amplifier device 20 stores only two EDIDs, only the EDID based on two Blocks among the EDIDs included in the EDID of the display device 10 can be acquired.

[0050] [1.4 Processing Flow] Next, the processing flow of this embodiment will be described. Each process is realized as the functions described in FIG. 3 when the control unit 100, the control unit 200, and the control unit 300 execute a program. For convenience of explanation, each process will be described as being executed by the control unit.

[0051] The display device 10 has the control unit 200 set the EDID1, which is the capability information regarding the video format that the display device 10 can display (S102). That is, the EDID1, which is the capability information of the display device 10, is stored in the EDID storage area 112.

[0052] Also, the control unit 200 of the amplifier device 20 reads the EDID1 stored in the EDID storage area 112 of the display device 10 (S152). Then, the control unit 200 sets the EDID1 of the display device 10 as the EDID2 (S154). Here, the timing at which the control unit 200 reads the EDID1 may be when the amplifier device 20 is powered on, or may be the timing when the HDMI cable is connected (the timing when another device is connected via HDMI). It may also be the timing when an HPD (Hot Plug Detect) signal is received from the display device 10.

[0053] The control unit 200 has read the EDID1 from the display device 10. When the size of the EDID1 cannot be stored as the EDID2, the control unit 200 selects a video format from the EDID1 as necessary and stores it as the EDID2. That is, the control unit 200 deletes the EDID blocks that cannot be stored from the EDID1.

[0054] Here, the control unit 200 may determine the video format to be stored in the EDID2 from the EDID1 as follows.

[0055] (1) The control unit 200 stores the video format of the number of blocks that can be stored as EDID2 from the head block of EDID1. For example, when there are two video formats that can be stored as EDID in the amplifier device 20, among the video formats included in EDID1, the first two video formats are stored as EDID2.

[0056] (2) The control unit 200 selects the video format with a data format that can be decoded from among the data formats of the video formats included in EDID1. For example, when the amplifier device 20 can only recognize video formats described in the data format of the old format, the video formats described in the data format of the new format included in EDID1 are deleted.

[0057] (3) The control unit 200 stores the amount that can be stored from the high - resolution video formats among the video formats included in EDID1. The high - resolution video formats may be simply compared within EDID1, or may be based on the video formats supported by the game device 30.

[0058] Subsequently, the control unit 100 of the display device 10 reads EDID2 from the amplifier device 20 (S104). Here, when the sizes of EDID1 and EDID2 are the same, the control unit 100 determines that the EDID of the display device 10 is correctly set (S106; No).

[0059] When the control unit 100 determines that EDID1 and EDID2 are different, it determines that EDID2 is set differently from EDID1 of the display device 10. For example, in FIG. 3, the control unit 100 determines whether the size of EDID2 is smaller than the size of EDID1 (S106). When the size of EDID2 is smaller than the size of EDID1, it is highly likely that some of the video formats included in EDID1 have been deleted by the control unit 200.

[0060] Therefore, the control unit 100 sets EDID1 to the same size as EDID2 so that EDID1 is appropriately set (S108). For example, when the number of blocks of EDID2 acquired in S104 is 2, the video format is selected with the number of blocks of EDID1 being 2. That is, only the blocks of EDID1 that can be stored in EDID2 are selected from among the blocks constituting EDID1.

[0061] When the control unit 100 sets EDID1 to the same size as EDID2, the following processing may be executed.

[0062] (1) The control unit 100 preferentially sets the video format of the new format included in EDID1. At this time, the control unit 100 overwrites and sets the video format of the old format with the data of the new format.

[0063] (2) The control unit 100 preferentially sets the video formats with high resolution or high image quality among the video formats included in EDID1.

[0064] The control unit 100 executes control to turn off the hot plug once and then turn it on again (S110) in order to prompt other devices to read the re-set EDID. This is because when the HPD (Hot Plug Detect) signal is notified to other devices, the other devices will read the EDID again.

[0065] Also in this embodiment, when the amplifier device 20 detects the hot plug (detects the HPD signal), it reads the EDID from the display device 10 again (S156; Yes → S152).

[0066] Further, in the game device 30, the control unit 300 reads the EDID2 (S182) and determines the highest resolution from the video formats included in the EDID2 (S184). Here, the EDID2 read by the control unit 300 is the EDID2 reset in S108. Note that the amplifier device 20 may output an HPD signal in the same manner as S110 of the display device 10 after setting the EDID2 in S154. When the control unit 300 of the game device 30 detects the HPD signal, it reads the EDID2.

[0067] As a result, even if the EDID2 is updated, the game device 30 can read the updated EDID2.

[0068] [1.5 Operation Example] Next, the operation example will be described with reference to FIG. 5. First, the display device 10 stores video formats in three blocks as the EDID1. The amplifier device 20 reads the EDID1 from the display device 10 (P102). Here, since the amplifier device 20 is an HDMI 1.4 compliant device, the EDID has two blocks for storing video formats. Therefore, the video format corresponding to the new format included in Block 3 of the EDID1 (the format corresponding to the 1440p60 signal) is deleted (P104).

[0069] The display device 10 reads the EDID2 from the amplifier device 20 (P106). Then, the display device 10 confirms that the size of the EDID2 has changed (become smaller) compared to the size of the EDID1.

[0070] Therefore, the display device 10 resets the EDID1 to a size that can be stored in the EDID2, making it smaller. At this time, the 1440p60 signal corresponding format, which is the new format, is described in Block 2, and Block 3 is deleted (P108).

[0071] The amplifier device 20 reads the EDID1 again and sets it as EDID2 (P110). Then, the game device 30 reads the EDID stored in the amplifier device 20 to confirm the video format that the display device can display (P112). Here, referring to the resolution compatibility table of the game device 30, the highest resolution among the resolutions at which the video can be output is selected. That is, the game device 30 can output a video signal of 1440p60 (P114).

[0072] [1.6 Effect] Thus, according to the present embodiment, even if the size of the storage area in the EDID is different depending on devices with different specifications, for example, other devices can appropriately confirm the information that the display device can display.

[0073] Also, the sink device reads the EDID presented to the source device connected to the repeater device, and compares the size of the read EDID with the size of the EDID that the sink device presents to the repeater device. If the size of the EDID is smaller, the sink device changes it to the EDID size used by the repeater device. Therefore, the repeater device can correctly read the EDID of that size, and the sink device can present the EDID expected by the sink device to the source device connected to the repeater device.

[0074] [2. Second Embodiment] The second embodiment will be described. The second embodiment describes the case where a game device 30 compatible with HDMI 1.4 is connected to a display device 10 compatible with HDMI 2.1.

[0075] In the second embodiment, the description of the parts having the same hardware and software configurations as those in the first embodiment is omitted, and the description will focus on the points different from the first embodiment.

[0076] FIG. 6 is a diagram for explaining an example of the process executed by the display device 10 in the second embodiment. The process in FIG. 6 replaces the process of the display device 10 described in FIG. 4.

[0077] First, the control unit 100 of the display device 10 acquires information of the connected device (for example, the game device 30) (S202). For example, the control unit 100 acquires, as the information to be acquired, the capability information that the game device 30 can output. As the capability information regarding the display capability of the game device 30, the following information may be acquired.

[0078] · HDMI standard supported by the game device 30 · Video format supported by the game device 30. For example, the resolution of the main video of the game device 30

[0079] Therefore, the control unit 100 acquires, for example, the name, type, ID, etc. of the game device 30 from the game device 30 using CEC (Consumer Electronics Control). Then, the control unit 100 may acquire information of the game device 30 from an external server device based on the acquired name, etc. of the game device 30. Further, the display device 10 stores information regarding the game device 30 in advance as a table, and may specify the display capability of the game device by referring to the table.

[0080] Then, for example, when the control unit 100 acquires that the game device 30 supports only HDMI 1.4, the game device 30 can read only the EDID in the data format of the old format corresponding to HDMI 1.4. In other words, the control unit 100 recognizes that the data format of the video format of the game device 30 does not support the new format.

[0081] Therefore, the control unit 100 converts the data format described in the new format among the video formats included in the EDID into the data format described in the old format (S204; Yes → S206). Then, the control unit 100 sets the EDID1 in which the video format of the new format of the EDID1 is converted into the video format of the old format. The control unit 100 stores the EDID1 in the EDID storage area 112.

[0082] As a result, the game device 30 reads the EDID1 from the display device 10. Since all of the EDID1 is described in the data format of the old format, among the video formats that the display device 10 can display, the game device 30 can select the highest resolution and output the video.

[0083] FIG. 7 is a diagram for explaining an example of a new format and an old format. FIG. 7(a) is a new format showing a video format of 1440p60 as the EDID, and FIG. 7(b) is an old format showing a video format of 1440p60 as the EDID.

[0084] FIG. 7(a) shows the data format stored in the EDID block, and the parameters are coded according to the standard document of A DTV Profile for Uncompressed High Speed Digital Interfaces CTA-861. The new format can represent the video format by using an ID and a flag. The details of the format are clear by referring to the above-mentioned standard, for example. Among the parameters in FIG. 7(a), some parameters will be described below.

[0085] · Since Y420 is "1", Y420 is supported (YCbCr = 4:2:0 as the color information) · Since RID (Resolution & Aspect Radio) is "8", it indicates "2560x1440p 16:9" · Since BFR60 is "1" and "Frame Rate Factor 1x" is "1", the supported frame rate indicates "59.94Hz & 60Hz"

[0086] In this way, the new format can specifically identify the video format using an ID or a flag. However, in a device that does not support the new format (for example, a device connected via HDMI Specification 1.4), the video format cannot be identified in this data format. For example, an HDMI 1.4 device can only read the EDID described in the data format of the old format.

[0087] Therefore, the control unit 100 converts the data format of the new format among the video formats into the old format as shown in FIG. 7(b). In the old format, detailed information of the signal (for example, Pixel Clock, H Active, etc.) is specifically described.

[0088] For example, for the video format of 1440p60, the data format is stored as shown in FIG. 7(b), and by analyzing this data, it is identified that the video format is as follows.

[0089] Pixel Clock : 241.92 MHz H Active : 2560 pixels H Blanking : 128 pixels V Active : 1440 lines V Blanking : 60 lines H Sync Offset (H Front): 64 pixels H Sync Pulse Width : 32 pixels V Sync Offset (V Front): 24 lines V Sync Pulse Width : 8 lines H Image Size : 1209 mm V Image Size : 680 mm H Border : 0 pixels V Border : 0 lines Flags - Non-interlaced - Normal display, no stereo - Digital separate: V sync -, H sync +

[0090] Note that the Pixel Clock may be calculated as follows. H Total * V Total * V Freq = PIXEL CLOCK (2560 + 128) * (1440 + 60) * 60Hz = 241.92MHz

[0091] This enables even devices that only support the old format to output high-resolution video.

[0092] FIG. 8 is a diagram for explaining one operation example of the present embodiment. FIG. 8 illustrates a case where a game device 30 compliant with HDMI Specification 1.4 is connected to a display device 10 compliant with HDMI Specification 2.1.

[0093] The display device 10 acquires information for identifying the game device 30 (e.g., the name of the game device 30) from the game device 30 using, for example, CEC.

[0094] Subsequently, based on the information for identifying the game device 30, the display device 10 inquires of the server device 40 to acquire the display capabilities that the display device 10 can support (P204). Here, the display device 10 sets the EDID1 in which the data format of the new format among the video formats included in the EDID1 is converted to the data format of the old format (P206). Note that when the video format that the game device 30 can support as the highest resolution in the EDID1 is in the data format of the new format, it is converted to the data format of the old format.

[0095] The game device 30 refers to the EDID1 (P208) and determines the output with the highest resolution. For example, the game device 30 refers to a resolution-compatible table, and among the video formats included in the EDID1, it determines the video format with the highest resolution (e.g., 1440p60) and outputs a video signal in the video format (P210).

[0096] Thus, according to the present embodiment, even when the data format of the video format of the EDID available in the display device 10 is a new format (first format) and cannot be recognized in the game device 30 which is the source device, the data format is converted to an old format (second format) that can be recognized by the game device 30 in the display device 10. Thereby, for example, even when devices with different HDMI standard versions are connected, the available high resolution is selected and the video is output from the display device 10.

[0097] [3. Third Embodiment] The third embodiment will be described. The third embodiment describes the case where an amplifier device 20 and a game device 30 compatible with HDMI 1.4 are connected to the display device 10 compatible with HDMI 2.1.

[0098] In the third embodiment, the description of the parts with the same hardware and software configurations as those in the first embodiment is omitted, and the description will focus on the differences from the first embodiment.

[0099] FIG. 9 is a diagram replacing the process of FIG. 4 described in the first embodiment. The same reference numerals are given to the processes described in FIG. 4, and the description thereof is omitted.

[0100] The control unit 100 of the display device 10 reads EDID2 from the amplifier device 20 (S104) and compares it with EDID1 (S302). Here, when the sizes of EDID1 and EDID2 are different, the control unit 100 changes the new format to the old format (S302; Yes → S304). Here, since all the video formats included in EDID1 are changed to the data format of the old format, the amplifier device 20 and the game device 30 can use EDID1 of the display device.

[0101] FIG. 10 is a diagram for explaining one example of the operation of the present embodiment. FIG. 10 illustrates a case where an HDMI 2.1 - compatible display device 10, an HDMI 1.4 - compatible amplifier device 20, and a game device 30 are connected.

[0102] First, the amplifier device 20 reads EDID1 from the display device 10 (P302). The amplifier device 20 sets the read EDID1 as EDID2 (P304). Here, since the amplifier device 20 cannot recognize the video format described in the new format included in EDID1, the video format described in the new format is deleted and saved as EDID2.

[0103] The display device 10 reads EDID2 from the amplifier device 20 (P306). Then, when comparing EDID1 and EDID2, it is confirmed that the sizes are different. That is, the display device 10 determines that the contents of EDID1 and EDID2 are different.

[0104] Therefore, the display device 10 converts the data format of the new format among the video formats included in EDID1 into the data format of the old format (P308).

[0105] The amplifier device 20 reads the EDID1 again and sets it as the EDID2 (P310). Then, the game device 30 reads the EDID stored in the amplifier device 20 to confirm the video format that the display device can display (P312). Here, referring to the resolution compatibility table that the game device 30 has, the highest resolution among the resolutions at which the video can be output is selected. That is, the game device 30 can output a video signal of 1440p60 (P314).

[0106] Thus, according to this embodiment, even if devices with different specifications are connected, for example, the sink device (display device 10) can be output with appropriate modification by converting it into a data format that can be confirmed by other devices (for example, the amplifier device 20 which is a relay device and the game device 30 which is a source device).

[0107] [4. Modification Example] The present disclosure is not limited to the above-described embodiments, and various modifications are possible. That is, embodiments obtained by appropriately combining technical means modified within the scope not departing from the gist of the present disclosure are also included in the technical scope.

[0108] Also, the above-described embodiments are described separately for convenience of explanation, but they can be combined and executed within the possible range. Also, for any technology described in the specification, there is an intention to obtain rights in corrections or divisional applications, etc.

[0109] In addition, in the above-described embodiments, HDMI has been described as an example of the connection format of the device, but other connection formats may also be used. For example, at the time of filing, DVI, VGA, Display Port, or other such methods may be used as connection formats that can utilize the EDID indicating the display capabilities. Also, in the above-described embodiments, the EDID is used as the information indicating the display capabilities, but any other information may be used as long as it indicates the display capabilities. Further, regarding the HDMI standard, two standards, the first standard and the second standard, have been described as examples, but three or more standards may be mixed. Even in this case, for example, the device that outputs video can use the highest resolution among the resolutions that the device that displays the video can output.

[0110] Also, the program that operates in each device in each embodiment is a program (a program that causes a computer to function) that controls a CPU or the like so as to realize the functions of the above-described embodiments. And the information handled by these devices is temporarily stored in a temporary storage device (for example, RAM) during its processing, and then stored in storage devices such as various ROMs and HDDs, and is read by the CPU as needed for correction and writing.

[0111] Here, as the recording medium for storing the program, any of a semiconductor medium (for example, ROM, non-volatile memory card, etc.), an optical recording medium / photo-magnetic recording medium (for example, DVD (Digital Versatile Disc), CD (Compact Disc), BD (Blu-ray (registered trademark) Disc), etc.), a magnetic recording medium (for example, magnetic tape, flexible disk, etc.) may be used.

[0112] Also, when distributing on the market, the program can be stored in a portable recording medium for distribution, or transferred to a server computer connected via a network such as the Internet. In this case, the storage device of the server device is of course also included in the present disclosure.

[0113] Furthermore, the above-described data is not stored in the device, but may be stored in an external device and called as appropriate. For example, the data may be stored in a NAS (Network Attached Storage) or stored in the cloud.

[0114] Note that the scope of the present disclosure is not limited to the configurations and limitations explicitly described in the specification, and combinations of the technologies disclosed in this specification are also included in the scope. Among the present disclosure, the configurations for which patent protection is sought are described in the appended claims, but it is not the intention to exclude them from the technical scope on the grounds that they are not described in the claims.

[0115] In addition, in the above-described specification, the descriptions of "in the case of ~" and "when ~" are illustrative examples and do not limit the configurations to those described. Configurations other than these cases and times are also disclosed to the extent that they are obvious to those skilled in the art and are intended to obtain rights.

[0116] Also, with respect to the descriptions of the processing and data flow described in the specification that involve an order, they are not limited to the described order. For example, configurations in which a part of the processing is deleted or the order is changed are also disclosed and are intended to obtain rights.

[0117] In addition, although the functions described in the embodiments are described as being executed by each device, they may be realized by one device or by further using an external server.

[0118] In addition, each functional block or various features of the apparatus used in the above-described embodiments can be implemented or executed by an electric circuit, for example, an integrated circuit or a plurality of integrated circuits. The electric circuit designed to execute the functions described in this specification may include a general-purpose use processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic, discrete hardware components, or a combination thereof. The general-purpose use processor may be a microprocessor, or may be a conventional type processor, controller, microcontroller, or state machine. The above-described electric circuit may be composed of a digital circuit or may be composed of an analog circuit. Further, when an integrated circuit technology that replaces the current integrated circuit appears due to the progress of semiconductor technology, one or more aspects of the present disclosure can also use a new integrated circuit by such technology.

Explanation of Signs

[0119] 10 Display device 100 Control unit 102 Operation control unit 104 Broadcast control unit 110 Storage 120 ROM 130 RAM 140 Display unit 150 Audio output unit 160 Interface unit 170 Communication unit 20 Relay device 200 Control unit 210 Storage 30 Game device 300 Control unit 310 Storage

Claims

1. In a display device to which another device is connected in accordance with the HDMI standard, a storage unit that stores first information including one or more pieces of information on video formats that can be displayed by the display device; a receiving unit that receives second information including one or more pieces of information on video formats that can be displayed by the display device from the other device; a control unit, and the control unit when the first information and the second information are different, changes the information to be processable by the other device and stores the first information; a display device.

2. The control unit when the first information is larger than the second information, specifies the information on the video format included in the first information so as to have the size of the second information; The display device according to claim 1.

3. The information on the video format that can be displayed by the display device includes information on a video format conforming to a first standard of the HDMI standard and information on a video format conforming to a second standard older than the first standard of the HDMI standard, the other device replaces a part of the information on the video format conforming to the first standard included in the first information with information on the video format conforming to the second standard so as to have the size of the second information and stores it; The display device according to claim 2.

4. The information on the video format that can be displayed by the display device includes information on a video format conforming to a first standard of the HDMI standard and information on a video format conforming to a second standard older than the first standard of the HDMI standard, the control unit converts the information on the format conforming to the first standard included in the first information into information on the format of the video format conforming to the second standard; The display device according to claim 1.

5. The first standard is the HDMI 2.1 standard, and the second standard is the HDMI 1.4 standard, and the first information and the second information are EDID; The display device according to claim 3 or 4.

6. The control unit transmits a signal serving as a trigger for reading out the first information to the other device. The display device according to claim 1.

7. In a display device to which another device is connected in accordance with the HDMI standard, a storage unit that stores first information including one or more pieces of information on video formats that can be displayed by the display device; A receiving unit that receives second information including one or more pieces of information on video formats that can be displayed by the display device from the other device; A control unit; and The information on the video formats that can be displayed by the display device includes information on video formats conforming to a first standard of the HDMI standard and information on video formats conforming to a second standard older than the first standard of the HDMI standard. The control unit When the other device can only use information on a video format conforming to the second standard, converts the information on the video format conforming to the first standard into information on the video format conforming to the first standard. Display device.

8. In a system in which a sink device and a source device can be connected via a relay device in accordance with the HDMI standard, The sink device stores first information including one or more pieces of information on video formats that can be displayed by the sink device. The relay device reads the first information from the sink device and stores information on video formats that can be stored in the relay device as second information. The sink device reads the second information from the relay device, and when the size of the second information is smaller than that of the first information, selects a video format so that the size that can be stored by the relay device as the second information is obtained, and stores it again as the first information. The relay device reads the first information again from the sink device and stores it as the second information. The source device reads the second information from the relay device, selects a video format that can be output with the highest resolution among the video formats included in the second information, and outputs the video. System.

9. The information on the video formats that can be displayed by the sink device includes information on video formats conforming to a first standard of the HDMI standard and information on video formats conforming to a second standard newer than the first standard of the HDMI standard. The sink device replaces a part of the information on the video format conforming to the first standard among the video formats included in the first video information with the information on the video format conforming to the second standard so that the size can be stored in the relay device, and stores it again as the first information. The system according to claim 8.

10. In a method for controlling a display device to which another device is connected in accordance with the HDMI standard, storing first information including one or more pieces of information on video formats that can be displayed by the display device; receiving second information including one or more pieces of information on video formats that can be displayed by the display device from the other device; when the first information and the second information are different, changing the information into information that can be processed by the other device and storing the first information; A control method including the above.

11. A program executed in a computer to which another device is connected in accordance with the HDMI standard, a function of storing first information including one or more pieces of information on video formats that can be displayed by the display device; a function of receiving second information including one or more pieces of information on video formats that can be displayed by the display device from the other device; a function of changing the first information into information that can be processed by the other device and storing the first information when the first information and the second information are different; A program that executes the above.

12. A recording medium on which the program of Claim 11 is recorded.

13. A video output method in a system in which a sink device and a source device can be connected via a relay device in accordance with the HDMI standard, the sink device stores first information including one or more pieces of information on video formats that can be displayed by the sink device; the relay device reads the first information from the sink device and stores information on video formats that can be stored in the relay device as second information; the sink device reads the second information from the relay device, and when the size of the second information is smaller than that of the first information, selects a video format so that the size is a size that can be stored by the relay device as the second information and stores it again as the first information; the relay device reads the first information again from the sink device and stores it as the second information; the source device reads the second information from the relay device, selects a video format that can be output as the highest resolution from among the video formats included in the second information, and outputs the video; A video output method.

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