Digital audio watermark system based on LabVIEW

We can use LabVIEW to embed the watermark that is a bi-level image in the digital audio. The system is composed of embedding watermark and extracting it. First, we read a audio into our program via the ‘Read WAV File’ node which has integrated into LabVIEW. Then initial audio information should be transformed by DWT, the location of embedding watermark would be selected based on human auditory peculiarity, and then modify the parity of the original audio signal wavelet coefficients. When we want to extract the watermark, we can detection of wavelet coefficients parity to make it come true. In the end, we use LabVIEW constitute a system that not only include the program embed the watermark in the digital audio but also include the program extract it.