Distance-Based Watermarking for Wave Audio Files

In this paper, two proposed algorithms are developed to invisibly watermark an iconic color jpg image in wave audio file. The work can be divided into two approaches. The 1st approach deals with embedding data in positions of zero contents. PSNR (peak signal to noise ratio) of this approach is high, its performance is limited to small number of inserted bits (4 bits insertion is selected), and the properties of the watermarked file are folded twice (length of quantization bits, size, and sampling rate). The 2nd approach depends mainly on the distances among the values of wave audio file to make embedding. These distances are specified by embedded data. PSNR is acceptable and is increased with an increasing of distance bits (4 and 8 bits are selected), while the watermarked object retains the same properties of cover object. For both approaches, the tests included both direct embedding and single and double level of discrete wavelet transform (DWT) embeddings