According to one embodiment, an encoding apparatus encodes each of items of image data captured in the same space by a plurality of cameras. A streaming apparatus changes items of encoded image data into streams, respectively. A resolution setting apparatus determines a resolution of each item of image data within the streams. A stream selection apparatus selects one or more streams from a plurality of streams within a transmission capacity. A stream synthesis apparatus synthesizes a selected stream and a stream which carries a control signal into one stream, and outputs a synthesized stream.
