| In recent years, radio and TV technology develope rapidly, TV signal is also being transformed from the coexist of simulation and digitalization to the Full Digitalization ,which reflects the change of display system is that multipicture display system and its video processing technology develop maturely . Compared to traditional TV wall , the advantages of mutipicture frame decollator and large screen display system " are prominent ,and along with the price of flat panel display equipment reduced, it has been widely used by outside broadcasting vehicle , signal monitor center, broadcast control center, the studio and so on .Multipicture frame decollator is that multiple signals are combined to single to be put out into a display device, presenting many pictures' information in the same screen . The Principle we used is to put multiple different format signal source (including HD and HQ,Analog composite , Component, SDI), which is processed through the image compression technique and digital , have several pictures compressed in a certain proportion into single signal to present on one monitor screen. Finally forming a structure of intersected display screen presents many pictures so that we only use a monitor to monitor the multiple signals.This paper mainly based on T144 + AQ309M LPC2214 multichannel video screen processing system ,Video processing is realized by full hardware , the system speed is greatly improved and at last we realize almost zero delay real-time synchronousThe system used the LPC2214-T144 and a piece of RTL8019AS to form control system, and also used the two pieces of EPM240 T100-as the assistant controller, used Philips company SAA7113 to complete video decoding part, while it used the AQ309M as video processing core, and the RTL8019AS as network controller, and the LPC2214-with a T144 LPC2214 as to be network.This system can directly access to the Ethernet, directly control system through the computer to achieve control function of the system remotely. |
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