Abstract: Method and system for channel-invariant robust audio hashing is provided with a robust hash extraction step where a robust hash is extracted from audio content dividing the audio content in frames; applying a transformation procedure on the frames to compute, for each frame, transformed coefficients; applying a normalization procedure on the transformed coefficients to obtain normalized coefficients, where the normalization procedure computes the product of the sign of each coefficient of the transformed coefficients by an amplitude-scaling-invariant function of any combination of the transformed coefficients; applying a quantization procedure on the normalized coefficients to obtain the robust hash of the audio content; and a comparison step where the robust hash is compared with reference hashes to find a match.

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