Multiple delayed position of echo hiding algorithm research and development

Echo hiding algorithm is a type of Information hiding technology which has been widely used. This paper introduces the principle and the mathematical model of echo hiding algorithm. Generally, the traditional echo hiding algorithm just allows to hide 180 bits of information in 1 second, in order to increase the hiding capacity, we proposed multiple delayed position of echo hiding algorithm. It permits each segment hiding 2 bits of data and introducing 4 delay positions, we expanded echo hiding space to a double capacity. The result was tested by experiments, extracted data which was encrypted by the algorithm has a stable effect showing that this algorithm has practical value in this field.