Audio watermarking

Audio Watermarking Under the guidance of Dr. Saroj Kumar Meher Presented by Suresh Chandra Martha EC200118335

INTRODUCTION ,[object Object],[object Object],[object Object]

AUDIO WATERMARKING Digital Audio Watermarking is a technology to hide information in an audio file without the information being audible to the listener, and without affecting in any way the audio quality of the original file. What we can define ,[object Object],[object Object],[object Object],[object Object],[object Object]

AUDIO WATERMARKING CHARACTERISTICS ,[object Object],[object Object],[object Object],[object Object]

CLASSIFICATION OF AUDIO WATERMARKING ,[object Object],[object Object],[object Object],[object Object]

AUDIO WATERMARKING SCHEMES ,[object Object],[object Object],[object Object],[object Object]

DC LEVEL SHIFTING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cont..

DC LEVEL SHIFTING ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Band Division Based on Quadrature Mirror Filter (QMF) Bank Cont..

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],WATERMARKED SIGNAL EXTRACTION USING QMF

FREQUENCY MASKING ,[object Object],[object Object],[object Object],Cont..

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SPREAD SPECTRUM Where w i is element of watermark y is the watermarked signal A correlation detector is carried out to detect the presence of the watermark and is described by Eqn where N is vector cardinality Cont..

SPREAD SPECTRUM While x can be modelled as Gaussian random vector, the normalised correlation test is described as Eqn If p = 1, watermark is present If p=0, watermark is not present

ANALYSIS OF VARIOUS TECHNIQUES ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Cont..

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Audio watermarking

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Audio watermarking