Design Of Sharing-Multimedia Controller Of Family

With the development of economy and culture, the resident environments of people are improved and more comfort and convenience are required. People try to combine multimedia technology with traditional residence together and create a intelligent and digital life for amusement.This thesis, two schemes of sharing multimedia controller of family is studied: one is based on wireless communications of RF and the other is based on bidirectional network of CATV. Sharing multimedia system of family takes the outputs of multimedia equipments as signal sources,takes televisions as terminals of display and completes deliver of video,audio and control signals by wired or wireless means. It realizes the share and remote control of multimedia equipments within the scope of family.The scheme based on wireless communications of RF utilizes optional channels and the method of checkouting and matching code to improve anti-jamming ability of wireless communications. Realization of the scheme includes the designs of the circuits of wireless video,audio system and wireless control system and firmware of MCU. The scheme based on CATV bidirectional network makes use of the unoccupied channels of CATV, takes coaxial line as medium and realizs bidirectional transmission of video,audio and control signals. Realization of the scheme includes the designs of modulating and demodulating circuits of TV and control signals and the design of bidirectional filters. Through analyzing the result of experiments, their characteristics of application are summed up and measures of improvement are proposed. So this thesis studies sharing multimedia system of family and controllers of it and discusses the realization and the prospect.