Research On Video Watermarking Algorithm Based On Wavelet Transform And Its Implementation On DM368 Platform

In recent years,digital watermarking technology has been widely applied in the field of intellectual property protection of digital products,with the development of digital video watermarking technology,it has become an important means of video copyright protection and content authentication.This paper expands the application field of watermarking technology.It proposes a real-time registration and synchronous transmission method for video stream and geographic coordinate information,the method is based on digital watermarking technology.In this paper,the main work is as follows:Firstly,according to the application needs of video surveillance system and video watermarking technology features,propose the application of video watermarking technology in video surveillance system.Secondly,introduce the basic theory of digital video watermarking technology and the Da Vinci technology.To lay theoretical foundation for the later work.Thirdly,propose a kind of digital video watermarking algorithm based on wavelet transform,using Matlab to simulate algorithm.Experimental results show that,the algorithm has good invisibility and robustness,and can be effective against a variety of attacks.Fourthly,according to the characteristics of geographic coordinate information,design a model that video stream and coordinate information transfer synchronously and a method that the geospatial coordinates is embedded into video stream synchronously,the method based on spread spectrum.According to the video processing procedure of DM368,the geographic coordinates information is embedded into the video stream in video acquisition thread,the function that video stream and coordinate information transfer synchronously is completed.By testing,the results show that geographic coordinate information can be embedded in the video stream.The video quality is not significantly affected.In the backstage,the watermark information can be completely extracted,and ensure that the real time and synchronization of geographic coordinate information and video streaming's transmission.