A communication apparatus includes a wireless communication unit which receives first encoded video data encoded by a first video encoding system from the first apparatus through a wireless network; a decoding unit which decodes the first encoded video data to provide decoded video data; an encoding unit which encodes the decoded video data into second encoded video data using a second video encoding system; and a wired communication unit which transmits the second encoded video data to the second apparatus through a wired network. The first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus. The second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus. The first video encoding system uses a video encoding different from MPEG encoding. The second video encoding system uses MPEG encoding.