| Currently the revolution of information is sweeping all over the world, thetide of network is becoming inundanta, and it is changing our custom ofeconomic, society, culture, people's thought and so on. The characteristic iswider and deeper than any other industry revolution. The competition amongstates is fury, international situation is fluky, the more information a countrycontrol, the better situation for that country. Recently, the problem of Intellectual Property Rights become more andmore important, and watermarking technology get more and more attention ofscholar. The application of Digital Watermarking technology is wide, which canbe applied in digital product copyright, tracing illegal user, preventing frommodify original product. With the rapid development of Internet, we can forecastthat the digital information will be the main communication in people. Digitalproduct bring a ot of conveniency for people, but at the same time a lot of lproblem that must be solved. For example, the problem of illegal copying andillegal modifying. By now, many scholars think that those problem can be solvedwith the mature of the Digital Watermarking. For this reason, we can see theimportance of the Digital Watermarking in the future. Furthermore, the speed ofour country information society is fast, need more and more security of networkand information. The information security domain is different from otherdomain , which must be done by our own strength. It is dangerous thatintroducing foreign product or advanced technology. For this reason, our countryregulate definitely: The product of information security must be based ourselvesupon. So, the scholars of China have the duty for studying Digital Watermarking,establishing own theory and exploring own Digital Watermarking product. Thetradition means of protection can't satisfy the requirement for security of digitalmedia, such as cryptography. Accordingly, the technique based on informationhiding emerges as the times require. The above is the research background forthis paper.The creativity task of this paper focuses on the four aspects.1. Collect and clean up a lot of literature about Aduio Digital Watermarking. - 100-Abstract2. On this base, simulate a lot of algorithm of old man, and these algorithm are sorted by us. In this paper, two class audio watermarking algorithms are sorted: time domain watermarking algorithm and transformation domain watermarking algorithm. At the same time, the virtue and defect of these algorithms are analysed.3. The mature cepstrum technology that used in speech analysis is applied in audio watermarking. Based on the ole man research, proposed three kinds of algorithms, they are: based on singal energy character algorithm; based on statistical mean modulation algorithm; Based on DCSK (Differential Chaos Shift Key) algorithm. The three algorithms proposed aims at different watermarks (Chaos, Binary image, text information) application separately, with good imperceptible and robust. The watermarks detection are blind without original signal, answer for the need of practice, so the proposed algorithms have good practicality value.4. Research the audio watermarking in wavelet domain. In the paper proposed a audio watermarking algorithm based on Sathidevi compression. The algorithm based on carry signal character, derive the judge threshold, so have good robust character with the attack of MP3.Sum up the international audio coding and decoding standard ISO 11172-3 (MPEG-1), summarize the audio perceptive model, propose a blind detection algorithm, compare with the existing algorithm in time domain, the proposed scheme can detect watermark accurately. The paper is divided into six chapters: In Chapter one, the study meaning of Digital Watermarking is described. Itexplain that Digital Watermarking is part of...
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