Abstract: A wireless transmission system for transmitting a picture data between a transmitter and a receiver by wireless communication is provided. Each of the receiver and the transmitter is equipped with a directional antenna and a non-directional antenna. A communication of the picture data is performed by using the directional antennas, and a communication of a control data indicating a reception status of the picture data is performed by using the non-directional antennas. The transmitter controls an intensity of a signal radiated from the directional antenna of the transmitter based on the control data so that the intensity becomes a minimum intensity that can transmit the picture data.

Abstract: A television broadcast receiving system has a receiving apparatus receiving a broadcast of a television station that carries out datacasting as well as broadcasting and displaying an image of a television program, and a remote control remotely controlling the receiving apparatus by using wireless communication. The receiving apparatus is provided with a remote control information producing portion producing remote control information based on predetermined information, the remote control information to be wirelessly transmitted to the remote control, and a wireless transmitting portion wirelessly transmitting the remote control information to the remote control. The remote control is provided with a wireless receiving portion wirelessly receiving the remote control information. Radio waves are used as media for wireless communication from the wireless transmitting portion to the wireless receiving portion.

Abstract: A wireless transmission system for transmitting a picture data between a transmitter and a receiver by wireless communication is provided. Each of the receiver and the transmitter is equipped with a directional antenna and a non-directional antenna. A communication of the picture data is performed by using the directional antennas, and a communication of a control data indicating a reception status of the picture data is performed by using the non-directional antennas. The transmitter controls an intensity of a signal radiated from the directional antenna of the transmitter based on the control data so that the intensity becomes a minimum intensity that can transmit the picture data.