A communication system includes a transmitter and a receiver. The transmitter includes a video signal outputting unit for outputting an uncompressed video signal of a predetermined content, an identification information generating unit for generating identification information for identifying whether the predetermined content is a still picture content, and a transmitting unit for transmitting wirelessly the video signal outputted from the video signal outputting unit and the identification information generated in the identification information generating unit to the receiver. The receiver includes a receiving unit for receiving the video signal and the identification information transmitted wirelessly from the transmitter, a video signal processor for processing the video signal received in the receiving unit, and a controller for controlling an operation of the video signal processor based on the identification information received in the receiving unit.