An Algorithmic Digital Audio Watermarking in Perceptual Domain Using Direct Sequence Spread Spectrum

In this Paper of audio watermarking we use the direct sequence spread spectrum. Psycho acoustic auditory model is taken for calculating masking threshold of audio signal. Masking threshold is used for shaping the watermark for imperceptibility. The watermark information as bits are taken pseudo random sequence numbers. The embedding algorithm embeds the watermark in the form of bits under the frames the audio to 2048 samples each. The extraction system extracts the watermark from the watermark audio signal by applying linear prediction analysis and filtering with matching procedure.