The Research And Application Of Digital Audio Watermarking Algorithm

With the increase of pirated edition and tort, protection of digital audio media's copyright has become the focus people concern. Watermarking is a very useful way to resolve the problem of copyright protection. Watermarking which is used to protect copyright demands high robustness. Along with the development of attack skills and ways, how to improve attack resistance ability of digital audio watermarking, especially the robustness, becomes an urgent problem to solve. The paper does some research aiming to copyright protection. Here are the main works:1.Analyzing a digital audio watermarking algorithm based on discrete wavelet transform. Coordinating and analyzing the experiment data through this kind of typical modulo algorithm experiment; we put the emphasis on analyzing the robustness of algorithm, and sum up the method and approach to improve it.2.Presenting a Self-Synchronous digital audio watermarking algorithm based on quantizing WTD (SQW). We design the algorithm by introducing the method of synchronous signal into watermarking domain and using synchronous signal to locate the position of embedded watermark. Compared SQW with the algorithm above via the experiment, it proves that SQW bears stronger robustness to resist attack such as quantizing precision lower than sample, Mp3 condensation, re-sampling.3.Designing a kind of digital copyright protection system based on SQW digital watermarking algorithm. We analyze the function structure and information structure respectively, give the entire basic structure and describe each function module, devise database of the system, at last presents a systemic flow of downloading audio content.