Research On Audio Digital Watermark Arithmetic Based On DWT

With the development of digital multimedia technology, digital watermark has become a popular topic in the field of digital copyright protection .Audio digital watermarking technique is application on the audio field , with such technique we can embed secred information into audio files ,so as to 'get copyright protection' and' secred ommunication' etc... This paper focus on the audio digital watermarking technique in order to protect audio file's copyright.Digital watermark technology is a method of knowledge copyright protection in recent year. With the increment of the global informatization degree and the utility of EC .The request of the knowledge copyright protection is stare us in the face .So the digital watermark is put forward .Digital audio watermark is a sort of digital watermark .There are a lot of arithmetic both here and broad against the investigation of digital audio watermark .In this paper, first, put forward the self_adapting audio digital watermark arithmetic under the additivity watermark arithmetic basis of DWT .It makes the insert watermark more secred and arithmetic robustness stronger. Second, because the chaos system has the speciality of better fake random, path cannot forecast, sensitivity of initial state and controlling parameters. It has been abroad applicated into cryptography and communications .In this paper, investigate the blind detection in the watermark insert and pick_up basis on chaos theory.