The Design And Research Of Video Capture System Under VxWorks

Voyage Data Recorder is an intelligent equipment which is used to record and conserve the important information and parameter of vessel during its voyaging. In all recorded data, Video data is the most veritably and directly. Video capture system can record the real-time video data during voyaging and find out the real reason of accident.This research subject is video capture system of Voyage Data Recorder. The research task is design and realization of video capture system under the VxWorks operate system and get a solution of decrease count of video data.This thesis introduces the embedded operate system VxWorks and the common developing flow of device driver under the VxWorks. Then analysis the video capture system in point of hardware, introduces the video capture system as a whole, video A/D chip, PCI bridge chip, I~2C bus and PCI bus. And analysis the video capture system in point of software, including the initialization program of video A/D chip and the driver program of PCI Bridge chip. At last, introduces the process of video data including characteristic of human vision, conserve of video data and the video sub sample.