A communication device comprising: a data reception unit configured to receive uncompressed image/audio data from a first device via a first transmission path, wherein the first device is an HDMI source device; an information storage unit configured to store transmission scheme information about information related to uncompressed image/audio data with which the communication device is compatible; and an information transmission unit configured to transmit the transmission scheme information stored in the information storage unit to the first device via the first transmission path; an information reception unit configured to receive, from the first device via the first transmission path, the information related to the uncompressed image/audio data to be received by the data reception unit, and transmission scheme information, selected by the first device, about the information related to the uncompressed image/audio data with which the communication device is compatible; a data processing unit configured to process the information related to the uncompressed image/audio data received by the information reception unit, in accordance with the transmission scheme information received by the information reception unit, and to generate content information by adding additional information to the information related to the uncompressed image/audio data, wherein the additional information comprises a content list; and a transmission unit configured to transmit the content information to a second device via a second transmission path , wherein the second device is DLNA compatible; a reception unit configured to receive selected information related to the uncompressed image/audio data from the second device via the second transmission path selected from the content list, wherein the communication device is an HDMI sink device and is DLNA compatible. a data reception unit configured to receive uncompressed image/audio data from a first device via a first transmission path, wherein the first device is an HDMI source device; an information storage unit configured to store transmission scheme information about information related to uncompressed image/audio data with which the communication device is compatible; and an information transmission unit configured to transmit the transmission scheme information stored in the information storage unit to the first device via the first transmission path; an information reception unit configured to receive, from the first device via the first transmission path, the information related to the uncompressed image/audio data to be received by the data reception unit, and transmission scheme information, selected by the first device, about the information related to the uncompressed image/audio data with which the communication device is compatible; a data processing unit configured to process the information related to the uncompressed image/audio data received by the information reception unit, in accordance with the transmission scheme information received by the information reception unit, and to generate content information by adding additional information to the information related to the uncompressed image/audio data, wherein the additional information comprises a content list; and a transmission unit configured to transmit the content information to a second device via a second transmission path , wherein the second device is DLNA compatible; a reception unit configured to receive selected information related to the uncompressed image/audio data from the second device via the second transmission path selected from the content list, <EOS>