Sink device, source device, and control methods for same

1 . A sink device comprising:

a connector connectable to an external source device, the connector corresponding to a first standard of high-definition multimedia interface (HDMI), the first standard being HDMI 2 . 1 ; and

a processor configured to:

receive a signal to be transmitted from the external source device through the connector while the connector is connected to the external source device;

identify whether the received signal is of a second standard of HDMI, the second standard being HDMI 2.0;

in response to the identifying that the received signal is of the second standard of HDMI, request for a correction of the signal transmitting from the external source device which is identified as the second standard of HDMI to the external source device to resolve electromagnetic interference (EMI) problem;

to receive the signal that has been corrected from the external source device; and

to provide a content corresponding to the received signal that has been corrected.

2 . The sink device of claim 1 , wherein the processor is further configured to request, to the external source device, the correction for the signal of the second standard of HDMI by requesting scramble or spread spectrum clocking (SSC) for the signal of the second standard of HDMI.

3 . The sink device of claim 1 , wherein the processor is further configured to identify that the received signal is of the first standard of HDMI by identifying that the received signal includes a clock signal and identify that the received signal is of the second standard of HDMI by identifying that the received signal includes a resolution information.

4 . The sink device of claim 1 , wherein the connector includes a first ground (GND) and the second standard of HDMI corresponds to a second GND which is a reinforced form of the first GND, and wherein, in the second GND, at least one of a number of ground points or areas of the ground points are bigger than those of the first GND.

5 . The sink device of claim 1 ,

wherein the first standard of HDMI is of a later version than a version of the second standard of HDMI.

6 . A source device comprising:

a communication interface connectable to a connector of an external sink device, the connector corresponding to a first standard of HDMI, the first standard being HDMI 2 . 1 ; and

a processor configured to:

control the communication interface, while the source device is connected to the connector of the external sink device through the communication interface, to transmit a signal of a second standard of HDMI, the second standard being HDMI 2.0;

in response to receiving a correction request for the signal of the second standard of HDMI to resolve EMI problem through the communication interface, correct the signal of the second standard of HDMI based on the correction request; and

control the communication interface to transmit the signal that has been corrected to the connector of the external sink device.

7 . The source device of claim 6 ,

wherein the processor is further configured to:

in response to the receiving of the correction request for the signal of the second standard of HDMI, perform scramble or spread spectrum clocking (SSC) processing of the signal of the second standard of HDMI; and

control the communication interface to transmit the performed signal to the external sink device.

8 . The source device of claim 6 ,

wherein the processor is further configured to:

in response to receiving extended display identification data (EDID) information of the external sink device from the external sink device, identify a standard of the connector included in the external sink device based on the EDID information, and

in response to the identifying that the standard of the connector of the external sink device corresponds to the first standard of HDMI, correct the signal of the second standard of HDMI; and

control the communication interface to transmit the corrected signal to the external sink device.

9 . The source device of claim 6 ,

wherein the connector includes a first ground (GND) and the second standard of HDMI corresponds to a second GND which is a reinforced form of the first GND, and wherein, in the second GND, a number of ground points or areas of the ground points are bigger than those of the first GND.

10 . The source device of claim 6 ,

wherein the first standard of HDMI is of a later version than a version of the second standard of HDMI.

11 . A control method for a sink device having a connector connectable to an external source device, and a processor, the method comprising:

receiving a signal to be transmitted from the external source device through the connector corresponding to a first standard of HDMI, the first standard being HDMI 2.1, while the connector is connected to the external source device;

identifying, by the processor, whether the received signal is of a second standard of HDMI, the second standard being HDMI 2.0;

in response to the identifying that the received signal is of the second standard of HDMI, requesting for a correction of the signal transmitting from the external source device which is identified as the second standard of HDMI to the external source device;

receiving the signal that has been corrected from the external source device; and

providing a content corresponding to the received signal that has been corrected.

12 . The control method of claim 11 ,

wherein the requesting comprises:

requesting scramble or spread spectrum clocking (SSC) for the signal of the second standard of HDMI.

13 . The control method of claim 11 ,

wherein the requesting comprises:

identifying that the signal is of the second standard of HDMI by identifying that the received signal includes at least one of a clock signal and a resolution information.