DATA HIDING IN AUDIO STEGANOGRAPHY USING PARITY CODING, ZLIB COMPRESSION AND DISCRETE WAVELET TRANSFORM
Information hiding technique is a new kind of secret communication technology. Audio Steganography is a technique used to transmit hidden data by modifying an audio signal. To improve robustness and embedding capacity for audio steganography parity coding and zlib compression are used. In this, data is compressed by using Zlib Compression. It is a combination of LZSS[Lempel-Ziv-Storer-Szymanski] and Huffman Coding. The compressed data is embedded in the appropriate frame of audio file using DWT. Apply reverse process of embedding to the stego audio signal and finally the message is extracted from the audio signal. The performance of audio steganography can be analysed by using signal to noise ratio(SNR), mean square error(MSE), bit error rate(BER).
