Abstract: A method of controlling consumer electronics control (CEC) communication between a sink device and a plurality of source devices connected through high-definition multimedia interface (HDMI) cables may include; generating cable connection information by monitoring whether the HDMI cables are respectively connected to a HDMI port among a plurality of HDMI ports of the sink device, generating CEC error information by monitoring whether a voltage of an internal CEC node is fixed, wherein CEC lines included in connected HDMI cables are commonly connected to the internal CEC node and the connected HDMI cables indicate present connection to the plurality of HDMI ports, and executing a user guide to diagnose a stuck state of the CEC lines of the connected HDMI cables in response to the cable connection information and the CEC error information.

Abstract: A method of controlling consumer electronics control (CEC) communication between a sink device and a plurality of source devices connected through high-definition multimedia interface (HDMI) cables may include; generating cable connection information by monitoring whether the HDMI cables are respectively connected to a HDMI port among a plurality of HDMI ports of the sink device, generating CEC error information by monitoring whether a voltage of an internal CEC node is fixed, wherein CEC lines included in connected HDMI cables are commonly connected to the internal CEC node and the connected HDMI cables indicate present connection to the plurality of HDMI ports, and executing a user guide to diagnose a stuck state of the CEC lines of the connected HDMI cables in response to the cable connection information and the CEC error information.

Abstract: An electronic device and an operating method thereof are provided. The electronic device includes a receiver, a memory, a processor configured to search the memory for fixed rate link (FRL) transmission bandwidth data for a source device in response to an electrical connection to the source device, perform FRL link training with a bandwidth value of the FRL transmission bandwidth data determined according to a FRL transmission bandwidth data search result, and process a content signal transmitted with a transmission bandwidth when the FRL link training is completed, and a reproducing device configured to perform a reproducing operation based on the processed content signal.

Abstract: An operating method for an electronic device that communicates with a source device through a high definition multimedia interface (HDMI), includes determining whether the source device supports a multi-extended display identification data (EDID) read operation through a display data channel (DDC) and sequentially transmitting an EDID set stored in a non-volatile memory to the source device using an EDID group corresponding to a size of a cache memory, as a transmission unit, based on a size of the EDID set and the size of the cache memory, when it is determined that the multi-EDID read operation is supported.

Abstract: An electronic device and an operating method thereof are provided. The electronic device includes a receiver, a memory, a processor configured to search the memory for fixed rate link (FRL) transmission bandwidth data for a source device in response to an electrical connection to the source device, perform FRL link training with a bandwidth value of the FRL transmission bandwidth data determined according to a FRL transmission bandwidth data search result, and process a content signal transmitted with a transmission bandwidth when the FRL link training is completed, and a reproducing device configured to perform a reproducing operation based on the processed content signal.