METHOD FOR HIDING AND CORRECTING ERROR OF SPEECH SIGNAL, IMAGE SIGNAL, AND VIDEO SIGNAL

摘要

PURPOSE: A method for hiding and correcting error of a speech signal, an image signal, and a video signal is provided to improve the hiding and correction rate of the error signals. CONSTITUTION: A method for hiding and correcting error of a speech signal, an image signal, and a video signal includes following steps. At the first step, a discrete fourier transformation(1) on the signal sample block is performed. At the second step, a fourier transformation(2) to form a block of N coefficients of M blocks is performed. At the third step, an inverse fourier transformation(3) on the fourier coefficients is performed for forming enlarged fusible signals. At the forth step, the set of fourier coefficients are composed of coefficients assigned as p(k) when k is attained for M successive integers. The p(k) is defined as p(k)=pk when p is a positive integer greater than 0 as well as smaller than N.