KR102455479B1 - Electronic device and control method thereof - Google Patents

Abstract

An electronic device is disclosed. The electronic device receiving the content from the external device includes, in addition to the EDID (Extended Display Identification Data) information of the first HDMI version, the EDID information of the second HDMI version higher than the first HDMI version, and the EDID information of the first HDMI version, the electronic device. A memory including at least one resolution information additionally supported by the device, an external interface communicating with an external device, and EDID information of the second HDMI version among the EDID information are not read by the external device, and the first HDMI version and a processor that allows only the EDID information and the at least one resolution information to be read to an external device.

Description

Electronic device and its control method { Electronic device and control method thereof }

The present invention relates to an electronic device and a control method thereof, and more particularly, to an electronic device supporting an HDMI port and a control method thereof.

As the content of Ultra HD resolution beyond Full HD (High Definition) resolution increases, sink devices having an HDMI port supporting HDMI 2.0 version are gradually spreading. However, a source device (eg, a DVD player, a set-top box, etc.) used in connection with the sink device often does not yet support the HDMI 2.0 version.

Accordingly, when a source device that does not support HDMI 2.0 version is connected to the HDMI port of a sink device that supports HDMI 2.0 version, the source device does not properly recognize EDID (Extended Display Identification Data) reading from the sink device. there was. This is because two VSDBs exist in the HDMI1.4 source device and the HDMI2.0 sink device. In the process of the HDMI1.4 source device reading the EDID of the HDMI2.0 sink device, the two VSDBs are stored in one storage space. This is because, as the VSDB read later is overwritten on the read VSDB data, the initially read VSDB data is lost and is not recognized properly.

The present invention is in accordance with the above-mentioned necessity, and an object of the present invention is to provide an optimal UHD screen or HDR screen by simply connecting an HDMI cable even if the user does not manually set the HDMI version menu corresponding to the HDMI input port of the sink device. An object of the present invention is to provide an electronic device and a method for controlling the same.

In particular, even if the user does not manually set the HDMI version menu corresponding to the HDMI input port of the sink device, the VSDB data is not lost regardless of the supported HDMI version by simply connecting an HDMI cable.

In order to achieve the above object, an electronic device receiving content from an external device according to an embodiment of the present invention includes EDID (Extended Display Identification Data) information of a first HDMI version, a first HDMI version higher than the first HDMI version. 2 A memory including at least one resolution information additionally supported by the electronic device in addition to the EDID information of the HDMI version and the EDID information of the first HDMI version, an external interface communicating with the external device, and the second of the EDID information and a processor configured to read only the EDID information of the first HDMI version and the at least one resolution information to the external device without reading the second version of the EDID information by the external device.

In addition, the processor is further configured to be configured that, when the specific menu related to the external interface is in an inactive state, the EDID information of the second HDMI version of the EDID is not read to the external device, and only the EDID information of the first HDMI version is read by the external device. , and the at least one resolution information may be read by the external device regardless of whether the specific menu is activated.

Here, the EDID information of the first HDMI version is recorded in a first area of the memory, the EDID information of the second version is recorded in a second area of the memory, and the at least one resolution information is recorded in a third area of the memory. can be recorded in

In addition, the first and second areas are areas in which VSDB (Vendor-Specific Data Block) of HDMI 1.4 version and HDMI Forum (HF)-VSDB of HDMI 2.0 version are recorded, respectively, and the third area is the HDMI It may be an area in which EDID information other than VSDB of 1.4 version and HF-VSDB of HDMI 2.0 version is recorded.

In addition, the at least one resolution information additionally supportable by the electronic device is set to a plurality of bits, and the at least one bit includes resolution information additionally supportable in addition to the resolution supportable in the first HDMI version in the electronic device, The other at least one bit may include additionally supportable color information in addition to the color supportable in the first HDMI version.

In addition, the processor automatically activates the specific menu or warns the user to activate the specific menu in response to the specific menu being deactivated and the content of the second HDMI version being input from the external device UI can be provided.

In addition, the processor provides a UI that automatically activates the specific menu or warns the user to activate the specific menu when SPD (Source Product Discription) information in which a specific bit is activated is received from the external device can do.

On the other hand, the electronic device that provides content according to an embodiment of the present invention includes EDID (Extended Display Identification Data) information of a first HDMI version, EDID information of a second HDMI version higher than the first HDMI version, and the An external interface communicating with an external device that stores at least one resolution information additionally supported by the electronic device in addition to the EDID information of the first HDMI version, and the EDID information of the second HDMI version among the EDID information stored in the external device is read and a processor that reads only the EDID information of the first HDMI version and the at least one resolution information, and provides content supportable by the sink device based on the read information.

Here, the external device is configured such that, when a specific menu related to an external interface is in an inactive state, the EDID information of the second HDMI version is not read to the source device and only the EDID information of the first HDMI version is read to the external device and the at least one resolution information may be read by the external device regardless of whether the menu is activated.

In addition, the processor recognizes that the menu is in an inactive state when only the EDID information of the first HDMI version and the at least one resolution information are read from the external device and the EDID information of the second version is not read, A control signal for automatically activating the menu or providing a UI warning a user to activate the menu may be transmitted to the sink device.

In addition, in addition to the EDID (Extended Display Identification Data) information of the first HDMI version, the EDID information of the second HDMI version higher than the first HDMI version, and the EDID information of the first HDMI version according to an embodiment of the present invention, The control method of an electronic device for storing at least one resolution information additionally supported by the electronic device includes the steps of determining whether to activate a specific menu when an event in which an external device is connected to an external interface occurs, and activating the specific menu Regardless of whether or not the at least one resolution information is transmitted to the external device, when the specific menu is in an inactive state, the EDID information of the second HDMI version of the EDID is not read to the external device, and the first HDMI and allowing only version EDID information to be read to the external device.

In addition, the EDID information of the first HDMI version is recorded in a first area of a memory provided in the electronic device and the EDID information of the second HDMI version is recorded in a second area of the memory, and the at least one resolution information is It may be recorded in the third area of the memory.

Here, the first and second areas are areas in which VSDB (Vendor-Specific Data Block) of HDMI 1.4 version and HF-VSDB of HDMI 2.0 version are recorded, respectively, and the third area is the VSDB of HDMI 1.4 version, respectively. and EDID information other than HF-VSDB of HDMI 2.0 version may be recorded.

In addition, the at least one resolution information additionally supportable by the electronic device is set to a plurality of bits, and the at least one bit includes resolution information additionally supportable in addition to the resolution supportable in the first HDMI version in the electronic device, The other at least one bit may include additionally supportable color information in addition to the color supportable in the first HDMI version.

In addition, in response to the specific menu being deactivated and the content of the second HDMI version being input from the external device, the specific menu is automatically activated or a UI warning the user to activate the specific menu is provided. It may further include the step of

In addition, when SPD (Source Product Discription) information in which a specific bit is activated is received from the external device, the step of automatically activating the specific menu or providing a UI warning the user to activate the specific menu is further performed. may include

In addition, in addition to the EDID (Extended Display Identification Data) information of the first HDMI version, the EDID information of the second HDMI version higher than the first HDMI version, and the EDID information of the first HDMI version according to an embodiment of the present invention, A recording medium storing a program for performing a control method of an electronic device for storing at least one resolution information additionally supported by the electronic device, the method comprising:

determining whether a specific menu is activated when an event in which an external device is connected to an external interface occurs, and the single resolution information is read to the external device regardless of whether the specific menu is activated, and the specific menu is displayed and allowing only the EDID information of the first HDMI version to be read to the external device without reading the EDID information of the second HDMI version among the EDIDs in the inactive state.

As described above, according to various embodiments of the present disclosure, even if the user does not manually set the menu for converting EDID information in relation to the HDMI version of the TV, only connecting the HDMI cable when connecting the source device supporting the HDMI 2.0 version This will allow you to view the optimal UHD screen or HDR screen.

1 is a block diagram of an electronic system according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of an electronic device according to an embodiment of the present invention.
3 is a block diagram illustrating a detailed configuration of the electronic device shown in FIG. 2 .
4 is a block diagram showing the configuration of an external device according to an embodiment of the present invention.
5A and 5B are diagrams illustrating the structure of the VSDB of the HDMI 1.4 version and the VSDB of the HDMI 2.0 version according to the HDMI standard.
6 is a view for explaining an area in which additional information is recorded according to an embodiment of the present invention.
7 is a view for explaining a menu for setting HDMI UHD Color according to an embodiment of the present invention.
8A and 8B are diagrams for explaining SPD information according to an embodiment of the present invention.
9 is a diagram for explaining a warning UI according to an embodiment of the present invention.
10 is a flowchart illustrating a method of controlling an electronic device according to an embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in more detail with reference to the accompanying drawings.

1 is a block diagram of an electronic system according to an embodiment of the present invention.

As shown in FIG. 1 , the content providing system 1000 includes a sink device 100 ′ and a source device 200 ′.

The source device 200 ′ provides content to the sink device 100 ′. Here, the source device 200' may be implemented as various types of electronic devices that can provide content to the sink device 100', such as a set-top box, a DVD player, a Blu-ray disc player, a PC, a game machine, etc. The sink device 100' is a network TV, smart TV, Internet TV, web TV, IPTV (Internet Protocol Television), signage, PC, etc. of various types capable of outputting content provided from the source device 100'. It may be implemented as an electronic device.

In particular, the sink device 100 ′ may be implemented as a device supporting a high-speed multimedia interface (HDMI). Accordingly, the sink device 100 ′ and the source device 200 ′ may have an HDMI port and may communicate with each other through the corresponding port. For example, the sink device 100 ′ and the source device 200 ′ may include an HDMI 2.0 port. Here, HDMI 2.0 is a standard optimized for an ultra-high-resolution environment called 4K or UHD (ultra HD). The maximum bandwidth has been improved to 18Gbps, and it is now possible to transmit smooth moving images at 60Hz at a resolution of up to 4,096 x 2,160 (2160p). Also, in 2015, the HDMI 2.0a standard was announced, which added a high-dynamic-range (HDR) video support function that improves the overall screen contrast and color discrimination ability and color to realize a better-looking image. The term is used in a sense including the HDMI 2.0a standard.

Specifically, the source device 200 ′ may provide the corresponding content to the sink device 100 ′ based on EDID information received from the sink device 100 ′. Here, EDID is a standard for transmitting display information from the sink device 100 ′, ie, the display side, to the source device 200 ′, ie, the host side. EDID does not define an interface signal like the Display Data Channel (DDC), but defines a data format for the host to read the capabilities of the display. EDID may include information on manufacturer's name, year/month of manufacture, product type, EDID version, product resolution and color coordinates, phosphor or filter type, timing, screen size, luminance, pixels, and the like.

In particular, in the HDMI standard, resolution information and color information of the sink device 100' are stored through VSDB (Vender Specific Data Block), the source device 200' reads the VSDB information, and the corresponding content is transferred to the sink device ( 100') is implemented. However, the sink device 100 ′ according to an embodiment of the present invention stores additional color information and resolution information in a memory area other than VSDB (Vender Specific Data Block) that defines resolution information and color information in the HDMI standard, and stores it It is read by the source device 200 ′, and content corresponding thereto may be received and output.

Hereinafter, various embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

2 is a block diagram illustrating a configuration of an electronic device according to an embodiment of the present invention.

As shown in FIG. 2 , the electronic device 100 includes a memory 110 , an external interface 120 , and a processor 130 . Here, the electronic device may be implemented as the sink device 100 ′ shown in FIG. 1 .

The memory 110 additionally stores EDID (Extended Display Identification Data) information of the first HDMI version, EDID information of the second HDMI version higher than the first HDMI version, and EDID information of the first HDMI version, in addition to the EDID information of the electronic device 100 . At least one supportable resolution information is included.

Specifically, the memory 110 supports in a first area in which EDID information of the first HDMI version is recorded, in a second area in which EDID information of a second HDMI version higher than the first HDMI version is recorded, and in the first HDMI version. It includes a third area in which resolution information and color information additionally supported by the electronic device 100 are recorded in addition to resolution and color information. Here, the first and second regions are defined in the HDMI standard, respectively, a Vendor-Specific Data Block (VSDB) of the HDMI 1.4 version (hereinafter, VSDB1.4) (refer to FIG. 5A ) and an HDMI Forum (HF) of the HDMI 2.0 version, respectively. -VSDB (hereinafter, VSDB2.0) (refer to FIG. 5B) may be implemented. Here, the information on the supportable specification of the third area may be information that matches the information on the specification stored in the second area.

Here, the information block called VSDB (Vender Specific Data Block) is, for example, referring to VSDB1.4 shown in FIG. 5A , the block is divided using an IEEE code and CEC Physical address information 510, Color bit information ( 520), the highest TMDS frequency information 530, and audio/video latency information. Here, the color bit information 520 means color information, and the highest TMDS (Transition Minimized Differential Signaling) frequency information 530 means resolution information. This is because high-resolution data can be transmitted accordingly. The external device 200 may determine which format signal the electronic device 100 can receive and output through the HDMI port through the VSDB including such information, and transmit the content in the corresponding signal format.

Meanwhile, the third region of the memory 110 may be formed of a plurality of bits, but is not limited thereto, and may be implemented as one bit or a plurality of three or more bits according to stored information. For example, when the third region is implemented with 2 bits, one bit includes information additionally supportable in addition to the resolution supportable by the HDMI 1.4 version in the electronic device 100, and the remaining bits include the resolution supportable in the HDMI 1.4 version. Additional supportable color information is included. Here, the meaning of including additional supportable information means that only information that can be supported in HDMI 1.4 version is included, and information that can be additionally supported in HDMI 1.4 version is included, and only information that can be additionally supported except information supportable in HDMI 1.4 version is included. In the case of inclusion, it is meant to include all. That is, according to an embodiment, the former may be implemented or the latter may be implemented. In addition, the meaning of including the additionally supportable information may also include the meaning that the information on the supportable specification of the third area may coincide with the information on the specification stored in the second area.

Meanwhile, the third region may be the above-described VSDB external region. For example, as shown in FIG. 6 , it may be a part of an area allocated to describe an ID Serial Numner according to the HDMI standard. For example, the third area may be set to second and third bit values 611 and 612 of the ODh area 610 among areas allocated to describe the ID serial number. However, the present invention is not limited thereto, and of course, a reserved area other than the VSDB may be used as the third area.

For example, the second bit of the third region indicates whether the maximum TMDS transmission data frequency of HDMI is 3Ghz or 6Ghz or 3Ghz. For example, a value of “1” indicates that the maximum TMDS transmission data frequency is 6Ghz, and a value of “0” indicates that the maximum TMDS transmission data frequency is 3Ghz, or vice versa.

Here, when the maximum TMDS transmission data frequency is 3Ghz, 480p/720p/1080i @ 60Hz/50Hz, 1080p @ 24Hz/25Hz/30Hz/60Hz 8bit~12bit, 4K 420 @ 60Hz 8bit, 4K 444/422 @ 24/25/ It means that resolution processing of 30Hz 8bit is possible. Also, when the maximum TMDS transmission data frequency is 6Ghz, 480p/720p/1080i @ 60Hz /50Hz, 1080p @ 24Hz/25Hz/30Hz/60Hz 8bit~12bit, 4K 420 @ 60Hz 8bit, 4K 444/422 @ 24/25/30Hz It means that resolution processing of 8bit ~ 12bit, 4K 444 @ 60Hz 8bit is possible.

The third bit of the third area indicates whether the color gamut that the HDMI terminal supports is BT2020 or BT709. For example, a value of “1” may indicate that the supportable color gamut is BT2020, and a value of “0” indicates that the supportable color gamut is BT709, or vice versa. On the other hand, according to the color gamut, the data bit depth is also automatically defined. In the case of BT2020, up to 10 bits and in the case of BT709, up to 8 bits can be supported.

On the other hand, the memory 110, for example, a flash memory type (flash memory type), ROM (eg, EEPROM, etc.), RAM (RAM), hard disk type (hard disk type), multimedia card micro type It may include a storage medium of at least one type of (multimedia card micro type) and card type memory (eg, SD or XD memory).

The external interface 120 communicates with an external device (not shown). Here, an external device (not shown) may be implemented as the source device 200 ′ shown in FIG. 1 . Hereinafter, for convenience of description, it is assumed that the external device is implemented as the source device 200 ′ shown in FIG. 1 .

The external interface 120 may be implemented as an HDMI port capable of receiving high-resolution video and multi-channel digital audio from the external device 200 ′ through a single cable. Specifically, the external interface 120 includes a Transition Minimized Differential Signaling (TMDS) channel that receives video and audio signals, and device information, video or audio related information (eg, Enhanced E-EDID (E-EDID) from the connected external device 200 ′). It includes a Display Data Channel (DDC) for receiving Extended Display Identification Data) and a Consumer Electronic Control (CEC) capable of transmitting a control signal to the external device 200 ′.

In particular, the external interface 120 may be implemented as an HDMI 2.0 input port supporting the HDMI 2.0 standard. Here, each version of the HDMI port has backward compatibility. Therefore, it is possible to connect and use the source device of the higher standard and the output device of the lower standard, or vice versa. However, in this case, only the functions corresponding to the lower standards can be used in both cases. For example, even if the electronic device 100 (eg, a TV) supports HDMI 2.0, if the external device 200 ′ (eg, a Blu-ray player) is HDMI 1.4 standard, only the HDMI 1.4 function can be used. .

The processor 130 controls the overall operation of the electronic device 100 . The processor 130 functions to control the overall operation of the electronic device 100 . Here, the processor 130 includes one or more of a central processing unit (CPU), a controller, an application processor (AP), or a communication processor (CP), and an ARM processor. may include

The processor 130 does not read the EDID information of the second version among the EDID information stored in the memory 110 by the external device 200 ′ according to a preset event, and the EDID information of the first HDMI version and at least the EDID information of the first HDMI version. Only one resolution information is read by the external device 200'. Here, as described above, the EDID information of the first HDMI version is recorded in the first area of the memory 110 and the EDID information of the second version is recorded in the second area of the memory 110 , and at least one resolution information is It may be recorded in the third area of the memory 110 .

In this case, the processor 130 does not read the data recorded in the second area among the data stored in the memory 110 to the external device 200 ′ according to a preset event, but in the first area and the third area. Controlled so that only recorded data is read to the external device 200'. Here, the preset event may be an event in which the external device 200 ′ is connected to the external interface 120 . For example, it may be an event in which the HDMI cable terminal of the external device 200' is connected to the external interface 120 implemented as an HDMI terminal, but is not limited thereto. As another example, depending on the embodiment, after connecting the HDMI terminal, it may be an event of selecting the corresponding terminal through a menu.

However, in order to implement such a service, the external device 200 ′ must know the location of the third area and the meaning of data recorded in the third area. That is, according to the HDMI standard, since the corresponding information is not recorded in the third area, the external device 200 ′ should know in advance that the resolution and color information are recorded in the third area. For example, when the "ID Manufacture Name" is a specific manufacturer, the external device 200' recognizes that the specific manufacturer records maritime information in the third area, reads the value recorded in the third area, Based on the read value, the corresponding content may be transmitted to the electronic device 100 . For example, the third area may be some reserved areas among areas allocated to describe the ID Serial Numner according to the HDMI standard. When the ID Serial Numner indicates a specific manufacturer, the external device 200' It is possible to obtain resolution and color information by checking the values recorded in the corresponding reserve area.

In addition, the processor 130 reads the data recorded in the first and second areas to the external device 200 ′ when a specific menu is activated, that is, set to ON, and is turned OFF when the corresponding menu is deactivated. When set, it is possible to control so that only the data recorded in the first area is read by the source device without reading the data recorded in the second area by the external device 200 ′. Here, the specific menu may be a menu 710 related to setting HDMI UHD Color as shown in FIG. 7 and is implemented to set ON/OFF for each HDMI port (711). However, the third area is an area other than the VSDB according to the HDMI standard, that is, an area that is read by the external device 200 ′ regardless of whether the corresponding menu is activated.

Accordingly, when the corresponding menu is deactivated, only the data recorded in the first and third areas is read by the external device 200', and the data recorded in the second area is in a state in which the external device 200' cannot read. will be.

In this regard, in general, HDMI 2.0 sink devices are shipped in a state in which the corresponding menu is deactivated, and are implemented so that the user sets whether to activate it according to the specification of the external device, that is, the ON/OFF state of the menu. .

According to the HDMI specification, if two or more VSDBs exist in the sink device, for example, VSDB of HDMI 1.4 version (hereinafter, VSDB1.4), and VSDB of HDMI 2.0 version (hereinafter, VSDB2.0)), the source device is IEEE It is necessary to check the code and read it separately to clearly classify the relevant information.

However, HDMI source devices that are currently on the market are implemented to read VSDB1.4 and read VSDB2.0 sequentially, so when an HDMI 1.4 source device is connected with an HDMI 2.0 sink device, VSDB2 on top of the previously read VSDB1.4 When .0 is overwritten, the existing VSDB1.4 data is corrupted. For example, the 4th bit of the 6th byte of VSDB1.4 (Fig. 5a) is bit information indicating whether the TV supports 30 bits. On top of this, VSDB2.0 (Fig. 5b) is overwritten again, so that the 6th bit of VSDB2.0 is The Rsvd(0) value, which is the 4th bit of the th byte, is stored. In this way, all bit information of VSDB1.4 is replaced with each bit information of VSDB2.0 in the same position.

Accordingly, the HDMI source device determines which function is supported by the connected sink device with the corrupted VSDB information. Accordingly, since the source device identifies the HDMI standard supported by the sink device with the damaged VSDB information, it outputs a signal based on the incorrect TV specification information. Due to this problem, there are problems such as not being able to output sound, not outputting a specific resolution, or setting the color bit incorrectly. This is because it is determined that the sink device connected to the source device does not support audio or high resolution because the TMDS maximum frequency is low based on the damaged VSDB information.

That is, VSDB1.4 and VSDB2.0 use different IEEE codes (for example, IEEE OUI is 0xC4, Ox5D, 0xD8 for VSDB2.0, VSDB1.4 is 0x03, 0x0C, 0x00), 1.4 As the source devices are not designed to handle HDMI VSDB separately, the above problem occurs.

To solve this problem, as described above, HDMI 2.0 sink device basically provides only VSDB1.4 information, and it is designed to provide VSDB2.0 only to the port to which the HDMI 2.0 source device is connected, when the user activates the above-mentioned specific menu. is being released. That is, in the case of an HDMI 2.0 source device, VSDB1.4 and VSDB2.0 are differentiated and designed to be processed at the same time, so only the HDMI input port to which the HDMI 2.0 source device is connected can be switched through the manual setting menu. will be. Accordingly, when an HDMI 1.4 source device is connected, since the corresponding menu is in an inactive state, only VSDB1.4 information is transmitted to the HDMI 1.4 source device so that the above-described problem does not occur.

Accordingly, the electronic device 100 according to the present invention is also a typical HDMI 2.0 sink device implemented so that data in the second area, that is, VSDB2.0 data, is not read to the external device 200' when the above-described specific menu is deactivated. The implementation form is being adopted.

Specifically, the processor 130 causes both VSDB1.4 information and VSDB2.0 information to be transmitted to the source device when the corresponding menu is activated, and only VSDB1.4 information to the external device 200' when the corresponding menu is deactivated. can be made to lead.

To this end, according to an embodiment, the memory 120 may separately include a first EEPROM that stores both VSDB1.4 and VSBB 2.0, and a second EEPROM that stores only VSDB1.4. In this case, the processor 130 controls the external device 200 ′ to read the first EEPROM data when the corresponding menu is activated, and causes the external device 200 ′ to read the second EEPROM data when the menu is deactivated. can be controlled

According to another embodiment, the processor 130 may change the data itself written in the memory 120 , for example, the EEPROM. Specifically, when the corresponding menu is activated, VSDB1.4 and VSDB2.0 can be stored in the EEPROM, and when the corresponding menu is deactivated, VSDB1.4 can be stored in the EEPROM.

On the other hand, in the state in which the corresponding menu is deactivated and a signal related to the second version (eg, an HDR signal or a 2160p 4:4:4 60Hz signal) is input from the source device 200 , the processor 130 operates the source device 200 ) to automatically switch the corresponding menu to the active state, or provide a UI that warns (or recommends) the user to switch to the active state. The reason is that the corresponding menu is inactive, that is, the source device 200 reads only VSDB1.4 except for VSDB2.0, but according to an embodiment of the present invention, the resolution information and color information of the third area are read together. In this case, since it means that the sink device 100 is an HDMI 2.0 device, the source device 200 transmits a control signal for activating the corresponding menu to the sink device 100 or instructs the user to switch the corresponding menu to an active state. A control signal for providing a warning UI may be transmitted to the sink device 100 .

In addition, when the corresponding menu is in an inactive state, but a signal (eg, an HDR signal) associated with the second version is input from the source device 200 , the processor 130 automatically switches the activation state or activates the corresponding menu. You can provide a UI that alerts the user to transition to a state. The reason is that the corresponding menu is in an inactive state, that is, only VSDB1.4 except for VSDB2.0 is transmitted to the source device 200, but the signal associated with the second version from the source device 200 (for example, HDR signal or 2160p 4: 4:4 60Hz signal), that is, that a signal related to HDMI 2.0 is input means that the source device 200 reads the resolution information and color information of the third region according to an embodiment of the present invention, that is, the sink Since the device 100 is an HDMI 2.0 device, it is possible to automatically switch the corresponding menu to the active state or provide a UI warning the user to switch to the active state.

In addition, the processor 130 may provide a UI warning to activate the corresponding menu when receiving SPD (Source Product Description) information in which a specific bit is activated from the external device 200 ′. Here, the SPD (Source Product Information) Infoframe ( FIGS. 8A and 800 ) consists of 25 bytes for providing the source product detailed information to the sink device.

For example, referring to FIG. 8B , the reserve bit 821-1 of the 24th byte 821 that transmits the audio content bit and the backlight control bit of the BD Wise Ver3.0 function may be used as a specific bit, but limited to this. it's not going to be That is, when the processor 130 receives SPD (Source Product Description) information in which a specific bit 821-1 is activated as “1” as shown in FIG. 8B , the external device 200 ′ performs VSDB2.0 and You can see that the content based on VSDB 1.4 is being output. In this case, when the corresponding menu is set to OFF, a UI warning to switch the corresponding menu setting to the ON state may be provided. 9 illustrates a case in which a warning UI 910 is provided according to the above-described various embodiments.

Meanwhile, according to another embodiment, even if the external device 200 ′ cannot read data of the third region according to an embodiment of the present invention, the fourth region indicating information supporting HDR content according to HDMI 2.0a It is determined that HDMI 2.0 content is supported by reading the information of A control signal for switching to the activated state may be transmitted to the electronic device 100 .

On the other hand, when a format supportable through the interface 120 of the electronic device 100, that is, the HDMI port, is also limited to VSDB1.4, and only VSDB1.4 is recorded in the memory 110, in an embodiment of the present invention Accordingly, when the corresponding menu is activated as ON, the processor 130 may change the input settings and input specifications of the HDMI port so that the HDMI port can receive the specifications described in the HDMI2.0 VSDB. That is, the processor 130 adds the specification of VSDB2.0 to the information of VSDB1.4 using 2 bits, and may change the input setting and input specification of the HDMI port to correspond thereto. Accordingly, even if only VSDB1.4 is stored, the electronic device 100 activates the corresponding menu to ON according to VSDB2.0 2160p/60Hz 4:4:4 (resolution), 10bit (data bit depth), BT.2020 (color gamut) signal can be input.

3 is a block diagram illustrating a detailed configuration of the electronic device shown in FIG. 2 .

Referring to FIG. 3 , the electronic device 100 includes a memory 110 , an external interface 120 , a processor 130 , a receiver 140 , a display 150 , an audio output unit 160 , and a user interface 170 . includes A detailed description of the portion overlapping with the configuration shown in FIG. 2 among the configuration shown in FIG. 3 will be omitted.

The external interface 120 may further include various wired/wireless interfaces that can be connected to external devices in addition to the above-described HDMI port. For example, wired interfaces such as USB terminal, CVBS (Composite Video Banking Sync) terminal, component terminal, S-video terminal (analog), DVI (Digital Visual Interface) terminal, and WLAN (Wireless LAN), Wi-Fi (Wireless) -Fidelity), Wi-Fi (Wireless Fidelity) Direct, Bluetooth, FID (Radio Frequency Identification), Infrared Data Association (IrDA), UWB (UltraWideband), ZigBee, DLNA (Digital Living Network) Alliance) and the like may include a wireless interface using a communication protocol.

The memory 130 may store a program for each signal processing and control in the processor 130 , or may store a signal-processed image, audio, or data signal. Also, the memory 130 may perform a function for temporarily storing an image, audio, or data signal input from the external interface 120 or the network interface unit 143 .

The receiver 140 may include at least one tuner 141 , a demodulator 142 , and a network interface 143 . In some cases, the receiver 140 may include the tuner 141 and the demodulator 142 but may not include the network interface 143 , and vice versa. The tuner 141 receives an RF broadcast signal by tuning a channel selected by a user or all channels previously stored among radio frequency (RF) broadcast signals received through an antenna. The demodulator 142 may receive and demodulate the digital IF signal DIF converted by the tuner 141 , and may perform channel decoding or the like.

The network interface unit 143 provides an interface for connecting the electronic device 100 to a wired/wireless network including an Internet network. The network interface unit 143 may include, for example, an Ethernet terminal for connection with a wired network, and for connection with a wireless network, for example, a WLAN (WirelessLAN) (Wi-Fi). ), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) communication standards, etc. can be used.

The display 150 generates a driving signal by converting the image signal, the data signal, the OSD signal processed by the processor 130, or the image signal and the data signal received from the external interface 120 into R, G, and B signals, respectively. do. The display 150 may be implemented as a PDP, LCD, OLED, a flexible display, a 3D display, a touch screen, or the like.

The audio output unit 160 receives a signal processed by the processor 130 , for example, a stereo signal, a 3.1 channel signal, or a 5.1 channel signal, and outputs the audio signal. The audio output unit 160 may be implemented with various types of speakers.

The user interface 170 transmits a command input by the user to the processor 130 or transmits a signal of the processor 130 to the user. For example, the user interface 170 is implemented in a form that communicates with a remote control device (not shown) according to various communication methods such as an RF communication method and an infrared (IR) communication method, or the electronic device 100 . It may be implemented in the form of a key panel provided in the .

4 is a block diagram showing the configuration of an external device according to an embodiment of the present invention.

As shown in FIG. 4 , the external device 200 includes a memory 210 , an interface 220 , and a processor 230 . Here, the external device 200 may be implemented as the source device 200 ′ shown in FIG. 1 .

The memory 210 temporarily or permanently stores information received from the electronic device 100 .

The interface 220 communicates with the electronic device 100 . Here, the electronic device 100 may be implemented as the sink device 100' shown in FIG. 1 .

The external interface 220 may be implemented as an HDMI port capable of transmitting high-resolution video and multi-channel digital audio to the electronic device 100 through a single cable.

The processor 230 reads only the EDID information of the first HDMI version and at least one resolution information without reading the EDID information of the second HDMI version among the EDID information stored in the electronic device 100 according to a preset event, and the read information based on the content supportable by the electronic device 100 is provided to the electronic device 100 .

Specifically, the processor 230 records the HDMI version Extended Display Identification Data (EDID) information recorded in the first area and the third area of the memory 110 included in the electronic device 100 according to a preset event. The resolution information and color information supportable by the electronic device 100 are read, and a final signal format supportable by the electronic device 100 is determined based on the information. Here, the preset event may be an event in which the electronic device 100 is connected to the interface 220 . For example, it may be an event in which the HDMI cable terminal of the electronic device 100 is connected to the interface 220 implemented as an HDMI terminal, but is not limited thereto. As another example, according to an embodiment, after the HDMI terminal is connected, it may be an event selected by the interface 220 implemented as the HDMI terminal through a menu provided by the electronic device 100 .

For example, since EDID information of HDMI 1.4 version is recorded in the first area and resolution information and color information corresponding to HDMI 2.0 version are recorded in the third area, the processor 130 determines that the electronic device 100 is HDMI 1.4 It can be determined that not only version (2160p/60Hz 4:2:0, 8bit, BT.709) but also HDMI 2.0 version (2160p/60Hz 4:4:4, 10bit, BT.2020) can be supported.

As such, it is confirmed that the external device 200 can support HDMI 2.0 version, that is, 2160p/60Hz 4:4:4 (resolution), 10bit (data bit depth), and BT.2020 (color gamut), and accordingly, the electronic device ( 100) outputs the signal with the specification that can realize the highest image quality that can be supported. However, in order to implement such a service, of course, the external device 200 must also be implemented as a source device supporting the HDMI 2.0 version.

In addition, when only EDID information of the first HDMI version and at least one resolution information are read from the electronic device 100 and the EDID information of the second version is not read from the electronic device 100 , the processor 230 displays a corresponding menu in the electronic device 100 . Recognizes that is in an inactive state and transmits a control signal for automatically activating the corresponding menu to the electronic device 100, or transmits a control signal for providing a UI warning the user to activate the corresponding menu to the electronic device 100 can be sent to That is, when the VSDB1.4 information of the first region and the resolution information and color information of the third region are read together from the electronic device 100 , the processor 230 determines that the electronic device 100 is an HDMI 2.0 device and selects a corresponding menu. This is because it can be determined that activation of

In addition, when the processor 230 transmits the corresponding content to the electronic device 100 based on the information indicated by VSDB1.4 and the two bits according to the third region read from the electronic device 100 , Source Product Information (SPD) ) by allocating some bits of the Infoframe, it is possible to inform the electronic device 100 that the signal currently being output is being output in a specification higher than the specification indicated in the actual EDID information, that is, VSDB 1.4. In this case, when a corresponding signal is received, the electronic device 100 may automatically activate the HDMI UHD Color menu in an ON state or provide a UI for recommending menu settings.

10 is a flowchart illustrating a method of controlling an electronic device according to an embodiment of the present invention.

The electronic device according to an embodiment of the present invention shown in FIG. 10 includes EDID (Extended Display Identification Data) information of a first HDMI version, EDID information of a second HDMI version higher than the first HDMI version, and a first HDMI A memory including at least one resolution information additionally supported by the electronic device in addition to the version EDID information may be provided. Here, the EDID information of the first HDMI version is recorded in the first area of the memory, the EDID information of the second version is recorded in the second area of the memory, and at least one resolution information is recorded in the third area of the memory. .

As shown, when an event in which an external device is connected to the external interface occurs (S1010:Y), it is determined whether a specific menu related to the external interface is activated, and when the corresponding menu is in an inactive state (S1020:Y), the memory The data recorded in the second area of the EDID stored in the EDID is not read by an external device, only the data recorded in the first area is read by the external device, and the data recorded in the third area is read regardless of whether the corresponding menu is activated It is transmitted to the device (S1030).

In addition, when the corresponding menu is activated (S1020:N), the external device reads all data recorded in the first and second areas, and the data recorded in the third area regardless of whether the corresponding menu is activated Let the external device read (S1040).

Here, the first and second areas are areas in which VSDB (Vendor-Specific Data Block) of HDMI 1.4 version and VSDB of HDMI 2.0 version are recorded, respectively, and the third area is the VSDB of HDMI 1.4 version and HDMI 2.0 version. It may be an area in which EDID information other than VSDB is recorded.

Also, the third region may be set to at least one bit. , for example, when set to 2 bits, one bit includes information on resolutions that can be additionally supported in addition to the resolutions supported by the HDMI 1.4 version in the electronic device, and the remaining bits include colors that can be additionally supported in addition to the colors supported by the HDMI 1.4 version. may contain information.

In addition, the control method further includes the step of automatically activating the specific menu or providing a UI warning the user to activate the specific menu when the specific menu is in an inactive state but the content of the second version is input from an external device may include

In addition, the control method includes the step of automatically activating a specific menu or providing a UI warning the user to activate a specific menu when SPD (Source Product Discription) information in which a specific bit is activated is received from an external device. may include more.

Meanwhile, the electronic device may be implemented as a sink device supporting the second version, and the external device may be implemented as a source device supporting the second version.

As described above, according to various embodiments of the present invention, even if the user does not manually set the menu for changing the EDID information corresponding to the HDMI version, the VSDB data is not lost regardless of the HDMI supported version by simply connecting the HDMI cable. can be dealt with without it. Specifically, even when an HDMI1.4 source device or an HDMI2.0 source device is connected to an HDMI2.0 sink device, it is possible to properly recognize the VSDB data inside the EDID data, thereby eliminating the error operation due to the difference in the HDMI version. That is, even if the user does not manually change the EDID setting corresponding to HDMI2.0 manually, when an HDMI2.0 source device is connected, another area (for example, By reading the information of the above-described third area), the same information as when the user manually changes the menu and sets HDMI2.0 EDID can be read. Accordingly, even when a sink device with a manual menu setting is connected so that the HDMI2.0 source device can read the first area that is EDID for HDMI1.4 and cannot read the second area, the optimal UHD screen or HDR screen is displayed. be able to provide

In addition, it is possible to provide a guide for setting the HDMI UHD Color menu, which is not familiar to the user, to suit the context of the electronic device. In addition, the user can reduce the hassle of manually setting the HDMI UHD Color menu by automatically activating the HDMI UHD Color menu based on the context of the electronic device.

Meanwhile, the above-described methods according to various embodiments of the present disclosure may be implemented only by upgrading software/hardware of an existing electronic device.

In addition, a non-transitory computer readable medium in which a program for sequentially performing the control method according to the present invention is stored may be provided.

The non-transitory readable medium refers to a medium that stores data semi-permanently, rather than a medium that stores data for a short moment, such as a register, cache, memory, etc., and can be read by a device. Specifically, the above-described various applications or programs may be provided by being stored in a non-transitory readable medium such as a CD, DVD, hard disk, Blu-ray disk, USB, memory card, ROM, and the like.

In addition, although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims In addition, various modifications may be made by those of ordinary skill in the art, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

100: electronic device 110: memory
120: external interface 130: processor

Claims (17)

An electronic device receiving content from an external device, the electronic device comprising:
At least one additionally supported by the electronic device in addition to the EDID (Extended Display Identification Data) information of the first HDMI version, the EDID information of the second HDMI version higher than the first HDMI version, and the EDID information of the first HDMI version a memory containing resolution information of
an external interface communicating with the external device; and
Among the EDID information, the EDID information of the second HDMI version is not read by the external device, and only the EDID information of the first HDMI version and the at least one resolution information are read by the external device; Electronic devices including. According to claim 1,
The processor is
When the specific menu related to the external interface is in an inactive state, the EDID information of the second HDMI version of the EDID information is not read to the external device, and only the EDID information of the first HDMI version is read to the external device,
and the at least one resolution information is read by the external device regardless of whether the specific menu is activated. According to claim 1,
EDID information of the first HDMI version is recorded in a first area of the memory and EDID information of the second HDMI version is recorded in a second area of the memory, and the at least one resolution information is stored in a third area of the memory Recorded, electronic device. 4. The method of claim 3,
The first and second areas are areas in which VSDB (Vendor-Specific Data Block) of HDMI 1.4 version and HDMI Forum (HF)-VSDB of HDMI 2.0 version are recorded, respectively,
The third area is an area in which EDID information other than the VSDB of the HDMI 1.4 version and the HF-VSDB of the HDMI 2.0 version is recorded. According to claim 1,
At least one piece of resolution information that can be additionally supported by the electronic device includes:
It is set to a plurality of bits, and at least one bit includes resolution information additionally supportable in addition to the resolution supportable in the first HDMI version in the electronic device, and at least one bit is in addition to the color supportable in the first HDMI version. An electronic device including additionally supportable color information. 3. The method of claim 2,
The processor is
In response to the specific menu being deactivated and the content of the second HDMI version being input from the external device, providing a UI to automatically activate the specific menu or to warn the user to activate the specific menu, electronic Device. 3. The method of claim 2,
The processor is
When Source Product Discription (SPD) information in which a specific bit is activated is received from the external device, the electronic device of claim 1, wherein the specific menu is automatically activated or a UI warning a user to activate the specific menu is provided. An electronic device that provides content, comprising:
At least one additionally supported by the electronic device in addition to the EDID (Extended Display Identification Data) information of the first HDMI version, the EDID information of the second HDMI version higher than the first HDMI version, and the EDID information of the first HDMI version an external interface communicating with an external device that stores resolution information of the; and
Among the EDID information stored in the external device, the EDID information of the second HDMI version is not read, only the EDID information of the first HDMI version and the at least one resolution information are read, and based on the read information, the external device An electronic device comprising a; a processor that provides supportable content. 9. The method of claim 8,
The external device is
When a specific menu related to an external interface is in an inactive state, the EDID information of the second HDMI version is not read to the external device, and only the EDID information of the first HDMI version is read to the external device,
and the at least one resolution information is read by the external device regardless of whether the menu is activated. 10. The method of claim 9,
The processor is
When only the EDID information of the first HDMI version and the at least one resolution information are read from the external device and the EDID information of the second HDMI version is not read, it recognizes that the menu is in an inactive state and automatically opens the menu. An electronic device that transmits a control signal for providing a UI for activating or warning a user to activate the menu to the external device. EDID (Extended Display Identification Data) information of the first HDMI version, EDID information of a second HDMI version higher than the first HDMI version, and EDID information of the first HDMI version, at least one additionally supported by the electronic device In the control method of the electronic device for storing resolution information,
determining whether a specific menu is activated when an event in which an external device is connected to an external interface occurs; and
The at least one resolution information is transmitted to the external device irrespective of whether the specific menu is activated, and when the specific menu is in an inactive state, the EDID information of the second HDMI version of the EDID information is not read to the external device. , allowing only EDID information of the first HDMI version to be read to the external device. 12. The method of claim 11,
EDID information of the first HDMI version is recorded in a first area of a memory provided in the electronic device, EDID information of the second HDMI version is recorded in a second area of the memory, and the at least one resolution information is recorded in the third area of the memory. 13. The method of claim 12,
The first and second areas are areas in which VSDB (Vendor-Specific Data Block) of HDMI 1.4 version and HF-VSDB of HDMI 2.0 version are recorded, respectively,
The third area is an area in which EDID information other than the VSDB of the HDMI 1.4 version and the HF-VSDB of the HDMI 2.0 version is recorded. 12. The method of claim 11,
At least one resolution information additionally supportable by the electronic device is set to a plurality of bits, and at least one bit includes resolution information additionally supportable in addition to the resolution supportable in the first HDMI version in the electronic device, and at least one other The bit of includes additionally supportable color information in addition to the color supportable in the first HDMI version. 12. The method of claim 11,
providing a UI that automatically activates the specific menu or warns a user to activate the specific menu in response to the specific menu being deactivated and the content of the second HDMI version being input from the external device; Further comprising, a control method. 12. The method of claim 11,
When SPD (Source Product Discription) information in which a specific bit is activated is received from the external device, the step of automatically activating the specific menu or providing a UI warning the user to activate the specific menu; further comprising to do, control method. EDID (Extended Display Identification Data) information of the first HDMI version, EDID information of a second HDMI version higher than the first HDMI version, and EDID information of the first HDMI version, at least one additionally supported by the electronic device A recording medium storing a program for performing a control method of the electronic device for storing resolution information, the recording medium comprising:
The method is
determining whether a specific menu is activated when an event in which an external device is connected to an external interface occurs; and
The single resolution information is read to the external device regardless of whether the specific menu is activated, and when the specific menu is in an inactive state, the EDID information of the second HDMI version of the EDID information is not read to the external device, and allowing only EDID information of the first HDMI version to be read to the external device.

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