High Definition Digital Video Watermarking System Key Technologies

With the popularization of high definition digital video, surveillance, identification,statistics and the copyright protection for high-definition digital video becomes more andmore attractive. Digital watermarking technology as an effective means to solve theseproblems, is applied to the HD digital video. However, the high-definition digital videowatermarking embedded system is seldom applied, because of the poor visibility of thehigh-definition digital video watermarking based on frame.There are two main difficulties of high-definition digital video watermarkingembedded system design, one is the large amount of data per second. To ensure thereal-time extraction is difficult. The other is high-definition video requires higher definition.The invisibility of the watermark also needs high requirements. Aiming at these twoproblems, this paper mainly carried out the following work:(1) refering to massive reference, the characteristics of high definition digital videowatermarking are analysed, to analyze and solve the key problem of invisibility andreal-time.(2) To analyze the volume of high-definition digital video watermarking data. tochoose the hardware according to the actual situation. To build an embedded real-timewatermarking hardware extracted system based on ADV7842and BF609as the core.(3) According to the theory of spread spectrum communication, an embeddingalgorithm is expressed based on complete complementary codes in wavelet domain. thealgorithm meet the requirement of high-definition digital video watermark imperceptibility,the real-time requirement of hardware digital watermark extraction algorithm and therequirements in practical applications.(4) To construct a complete set of high-definition digital video watermarking systemaccording to the selected hardware and algorithm theory, which composed videoembedded software, embedded real-time extraction system, watermark watermarkmanagement website and database management.HD digital video watermarking system is constructed in this paper to meet the real-time condition, which can meet the requirement of invisibility. The system can beapplied in HD video content detection, time statistics etc..