Audio digital signature algorithm based on LPP
Xiang Wu · Journal of PLA University of Science and Technology · 2009
A new audio digital signature based on LPP(locality preserving projections) and liner prediction on wavelet packet was presented to complete the authentication of audio data in the level of entireness and locate the operation of the tamper of audio data.In order to reduce the dimensionality of the eigenvector of audio data,to keep its inherent low dimensional structure and to make it easy to construct more effective digital signature algorithms,LPP method was introduced to get the low dimensional manifold of the audio features and realize the dimension reduction of the audio's high dimension features after the audio features generated by wallet packet transform and liner prediction.The chaotic encryption method was used to scramble the low dimension manifold to get the final signature.The experiments confirm that the signature is sensitive to the tamper of audio data,so the algorithm can be used in the authentication of audio data in the level of entireness.