Abstract: A method, a transmission centre, a base station and a system for sending broadcast television signals can implement automatic operation and management for broadcast television emission. The method includes: the broadcast television transmission centre determines control information for controlling the work of each station, sends the corresponding control information to each station through a broadcast television networks, and instructs each base station to control its work according to the received control information.

Abstract: Embodiments of the present invention relate to a common-spectrum transmission method for audio and video signals and a system thereof. The method comprises: a step A of performing a first frequency mixing process to a modulated carrier signal f0 of audio and video signals and a local oscillation signal f1 to generate a carrier signal f01; a step B of multiplexing the carrier signal f01 and the local oscillation signal f1 and then sending them to a transmitting base station; a step C of the transmitting base station performing a second frequency mixing process based on the carrier signal f01 and the local oscillation signal f1 to obtain the modulated carrier signal f0; a step D of the transmitting base station sending the modulated carrier signal f0 to respective receiving terminals.

Abstract: The present invention discloses a radio remote control method transmitted by short message of the mobile telephone and system thereof, including: assigning a unique identification code for the radio receiver of a controlled object and establishing a map between the identification code and a mobile phone number; transmitting by the mobile phone the short message containing control command, the short message receiving terminal, according to the map, converting the associated content in the short message into the identification code of radio receiver and instruction code of the controlled object; converting the identification code and the instruction code into radio signals in radio-transmitted format and then transmitting them; reverting the control instruction in the radio signal by the radio receiver having the identification code in its radio signal, and then transmitting it to the control system of the controlled object.