METHOD AND SYSTEM FOR ROBUST AUDIO HASHING.

摘要

Method and system for channel-invariant robust audio hashing, the method comprising: - a robust hash extraction step wherein a robust hash (110) is extracted from audio content (102,106), said step comprising: dividing the audio content (102,106) in frames; applying a transformation procedure (206) on said frames to compute, for each frame, transformed coefficients (208); applying a normalization procedure (212) on the transformed coefficients (208) to obtain normalized coefficients (214), wherein said normalization procedure (212) comprises computing the product of the sign of each coefficient of said transformed coefficients (208) by an amplitude-scaling-invariant function of any combination of said transformed coefficients (208); applying a quantization procedure (220) on said normalized coefficients (214) to obtain the robust hash (110) of the audio content (102,106); and - a comparison step wherein the robust hash (110) is compared with reference hashes (302) to find a match.