Watermarking audio menggunakan metode echo hiding

Abstract

Currently almost every aspect of life uses computers, causing the heavy use of digital data. There are several factors that cause digital data such as text, images, audio and video are widely used, partly because the data is easily and inexpensively copyed, and then easily stored for further processing, and easily distributed using either disk media or via the Internet. With such convenience is often the case in particular the use of audio digital data of illegal possession of one of the audio data such as counterfeiting or copyright infringement. Digital watermarking is one of the solution that can be used to solve the problem. Audio watermarking is a technique used in insert information or data in to audio media. Extraction can be done without affecting the audio quality. This study uses Echo Hiding watermarking method to audio file wav format. This technique works in the time domain by adding the data in a container with a raised voice signal echo. This research uses PSNR (Peak Signal to Noise Ratio) to measure the quality of the watermarked audio. From the analysis, the audio quality using this method is above 30 db and files can be extracted watermark with the BER (Bit Error Rate) = 0%. Echo hiding method in this study has successfully passed the resampling attack, the addition of noise, and multiple watermarking with the same watermark and method. Echo hiding method does not make it past cropping attack, time stretching, and multiple watermarking using the same methods and different watermark. Audio watermarking technique using echo hiding method in this study are implemented using Matlab 7.7.0.