The Research On Technology Of1394Digital Video Decoder Design Based On VxWorks

Our issue comes from the project of “The1394package under VxWorks”, wedevelopd the1394interface driver and application of DV decoder based on freescalePowerPC7448and VxWorks platform.VxWorks is a real-time operating system developed by WindRiver in USA withexcellent reliability and good real-time.It is widely used in military, communications,aviation and aerospace in intelligent control device system.IEEE1394is a high-speedserial bus.It is widely used in digital video transmission for its transfer function.VxWorks do not support IEEE1394protocol and its related applications.The main contents of this article are as follows:（1）I describe and analyse the feature of DV format and its principles.（2）I designed and implemented the1394DV digital video decoder onVxWorks.（3）I do a lot of optimizations to improve the speed of the decoder after plantingthe program to hardware platform.Now, the decoder can run on platform such as WindRiver’s VxSim and PowerPC7448.It can decode and record DV frames in real time.At present, the project has beenused in the industrial real-time video data acquisition devices.