A new adaptive audio watermarking algorithm

The technology of embedding image into the audio signal has been researched and an algorithm of additive audio watermarking based on SNR to determine a scaling parameter α is proposed. The visually recognizable binary watermark image could be embedded in the original signal wavelet domain in the algorithm. The intensity of embedded watermarks on the different audio segments would be modified by adaptively modulating the scaling parameter α. The experimental result demonstrate that the watermark is imperceptible and the algorithm is robust to many operations to digital audio signal, such as resampling, cropping, low pass filter, MP3 compression and so on. The algorithm is better than that without using SNR, and has a reference value to blind watermarking.