Patent ID: 6442283
Filing Date: 2002-08-27
Classification: G06T,G10L

Abstract:
A computer-implemented method comprising:receiving a vector x of N data samples, where x=[x(0)x(1) . . . x(Nâˆ’1)] and represents multimedia; receiving a vector p, where p=[p(0)p(1) . . . p(Nâˆ’b 1)] and represents a pseudo-random sequence; and, generating a new vector xâ€² in which the vector p is embedded in the vector x, such that xâ€²=[xâ€²(0)xâ€²(1) . . . xâ€²(Nâˆ’1)] and xâ€²=x +aq where a comprises a perception-based scaling factor and the vector q comprises a perceptually weighted pseudo-random sequence based on the vector p; wherein q=p*w, where w represents a weighting function, and wherein w&af;(i)=1Nf&it;&Sum;k=-(Nf-1)/2(Nf-1)/2&it;â€ƒ&it;&LeftBracketingBar;x&af;(i-k)&RightBracketingBar;,and f, represents a frequency and N represents a length.