New digital watermarking algorithm for audio authentication

This paper proposed a new digital watermarking algorithm for audio authentication to protect the audio integrity in the perceptual sense.Firstly,it framed an original digital audio and then divided each frame into two parts.Secondly,with the spatial watermarking technique,embedded synchronization code into the first part.And then performed the DCT and calculated the AFRV(adjacent-frame relationship vector) used as the watermark information on the second part.Finally embedded the watermark bit into the DCT intermediate frequency coefficients of other frame's second part.When authenticated,the algorithm could determine whether the audio had been malicious tampering by computing AFRE(adjacent-frame relationship error) and according to the pre-set threshold without the help from the origin watermark.If the data were subjected to tampering,it could find out the data error localization.Simulation results show that the proposed algorithm can not only realize the audio media integrity authentication,but also accurately identify the tamper location.