To provide a sending system for preventing embedded information such as a watermark from being missed, by optimizing a sending system configuration including an embedding device.

A 1-system broadcast sending system 200-1 and a 2-system broadcast sending system 200-2 comprise material switchers 202-1, 202-2, data multiplexers 203-1, 203-2, compressors 204-1, 204-2 and multiplexers 205-1, 205-2. Information embedding devices 104-1, 104-2 are provided at any position between internal devices. (e.g., position (1), (2), (3), (4) or the like in the figure). As a candidate of the plane to install the information embedding device 104, a pre-stage of the compressor 204 and a post-stage ((2) or (3)) of the material switcher 202 may be called optimal.