Asynchronous Control System Design Of Supporting Streaming Media Player On The Full-color LED Display

With the growing influence of advertising on people’s lives,LED full color display as a media terminal displays,the information of LED display can be replaced at any time.The LED display has been used in shopping malls,plazas,road transport,schools,stadiums,hospital and other places.Due to the existing full-color LED display asynchronous control systems are generally based on local play,people only see the multimedia information of control system that is advanced stored,which can not be updated in real time.However, support for streaming media player full color LED display asynchronous control system is able to receive real-time information that is broadcast by the media server though the network after leaving the PC,and presents the latest information for everyone.Meanwhile, the system can also enable a plurality of terminals operating simultaneously at different locations and receive the same media information,thereby to achieve the functions of cluster management playback.First,we should design the overall application architecture of asynchronous control system that support streaming media player on LED full color display,and then analyze the theoretical knowledge used in the system design,and analyze and select the rational transmission protocol that used in the streaming media player system. Secondly,the control system design the terminal control section from hardware and software aspects.Hardware design is based on ARM architecture chips,which use the Cadence software to design the core board and peripheral circuit. Software design includes the realization of the user terminal software and the building of operating system platform.User terminal application software using Visual Studio2005to design a streaming video player software that can run on the WINCE6.0operating system platform.The playback software support the ASF streaming format,and the video format is the MPEG4, audio format is AAC.Playback application software uses a modular design principle to design the source control module,the core and decoding module and video playback module. And analyze and explain in detail the dealing of the network synchronization,the handling of smoother video playback,the processing of multiple cards playing video simultaneously and the dealing of security mechanisms about the entire system.Finally,through to test and validate for the designed control system,the results showed that:the designed asynchronous control system that support the streaming media player on the full-color LED display enables smoothly play streaming video on full color LED display, which within its load range and under the certain conditions of frame rate and bandwidth.