Research On Reversible Audio Watermarking Algorithm

With the development of the Internet technology, all kinds of intelligent network terminalsarise today in the mobile communication society. Currently, people pay more and more attentionon information security problems. Information hiding is a potential technology, which can hideand transmit information by using media as the cover. One application for this technology is toprotect the copyright of digital audio files by using reversible audio watermarking methods.This paper first introduces the methods of information hiding, the basic principles of digitalwatermarking technology and various watermarking technology differences.Second, the paper is research on the capacity problem of reversible audio watermarkingwhich based on the audio compression expansion. We use experimental method to analysis theinfluence of watermark embedding capacity and we find some key factors affect the capacity. Sowe can through the appropriate parameters setting and the improvement of the watermarkingalgorithm to improve the capacity of the watermark.Third, we use a common data embedding method that the difference value is extended tothe audio of watermark, and recovering the original audio nondestructive data, so we can throughthis method to improve the ability of watermark. At the same time we use two different types ofDE to analysis and comparison of the size of the embedded watermark capacity.Finally, in order to embed watermark of more effective and reversible information in theaudio, we combined with compression expansion and forecast coding technology. According tothis method of the experimental data and get the simulation experiment data before the analysisof watermark capacity, we can learn something to be the main influence factors and the researchorientation for the future.