Speech Based Watermarking for Digital Images

This paper presents a novel scheme of

watermarking of digital images for copyright protection and

authentication. In this paper we proposed a method of

embedding owner’s speech signal. Speech being a biometric data,

the watermark signal in this method is expected to be more

meaningful and has closer correlation with copyright holder.

The main issue of concern here is the capacity because the speech

data has large number of samples. Linear predictive coding is

used to encode the audio data. Here, speech samples are

imperceptibly inserted using spread spectrum technique into the

mid frequency band of wavelet transform of image which makes

it robust to lossy compression. Applications for such a speechhiding

scheme include copy protection, authentication and covert

communication.