A robust audio digital watermarking algorithm in DCT domain for air channel transmission

A robust audio digital watermarking algorithm in DCT domain for air channel transmission was proposed. The algorithm is in DCT domain, and using code of Barker technique as synchronization code sequence. By modifying the coefficients of low frequency, the watermarking and synchronization code was embedded with large capacity and good hidden effect. Experimental results indicate that the proposed algorithm is able to resist common attacks and interference with air channel, and against cropping MP3 compression attacks and the attack of 30% resample, and achieve the blind watermarking extraction. To summarize, the proposed algorithm will give a new prospect to the research filed of audio digital watermarking for air transmission.