Research On Digital Audio Double Watermarking Technology Based On Security Features

The popularization of digitization and network has made digital signals as the main carrier of communication.In order to further efficiently and conveniently utilize digital signals to bring convenience to work and life,various tools for editing digital multimedia signals have emerged.These tools have indeed enriched our daily life and brought great convenience to work.However,for the criminals,these tools provide convenience for them to achieve their illegal goals.For example,audio content created by audio creators is illegally copied and distributed by criminals for profit;criminals maliciously modify the content of sensitive audio for ulterior motives,and so on.In order to solve the copyright protection and security issues of digital audio signals,this paper mainly studies the digital audio double watermarking technology based on confidential features.(1)We defined the confidential feature of digital audio signal.The extraction of this feature is closely related to the key.It is difficult for the unauthorized users to extract the correct audio feature without the key.(2)The characteristics of the confidential features are analyzed.The quantization method for watermark embedding based on this feature is presented and a digital audio double watermarking algorithm based on this feature is constructed.Firstly,the security feature of audio signal is extracted.Then,the watermark generated by copyright information and identification information used for tampering location is quantified.Then,the watermark is further embedded.In this paper,the watermark is embedded in the confidential feature to improve the security of the watermarking system.At the same time,the algorithm can protect the copyright and has the ability of tamper localization,which improves the practicability of the watermarking algorithm.Finally,experimental results confirm the effectiveness of the algorithm.