Design And Implementation Of The Audio Digital Watermarking Application Based On Android System

The usage of smart mobile phone has increased significantly with the arrival of the era of mobile Internet. Among these users, information exchanges have become more frequent and diverse, it leads to a problem of information security and secret communication. At present, there are many kinds of application about file encryption,mobile phone and traffic protection. At the same time, it is hard to find any application provided for users to covert communication. Along with the development of the digital watermark technology, there are broad prospects and practical significance on the application of digital watermarking technology used for covert communication.This paper study digital watermarking on audio signals for mobile phone platform,which combined audio digital watermarking technology and the android mobile platform features.Firstly, we introduced the principle of digital watermarking and android mobile platform, and analysed the key problem of the air channel will encounter.Secondly, we focus on an audio digital marking algorithm for air channel. We divided the audio signal into sub intervals in the time domain, then determined the frequency and amplitude of watermark signal by power spectrum of each sub interval, and let the watermark embedded in the low coefficient of watermark in the sub interval spectrum.Finally, we implemented the system on the android platform. According to the tests,we verified the feasibility of the covert communication audio watermarking for android platform.