公开(公告)号：US09905234B2

公开(公告)日：2018-02-27

申请号：US15051232

申请日：2016-02-23

Applicant: Electronics and Telecommunications Research Institute

Inventor： Seung Kwon Baeck ,  Tae Jin Park ,  Jong Mo Sung ,  Yong Ju Lee ,  Tae Jin Lee ,  Jin Soo Choi

IPC: G10L19/018

CPC classification number: G10L19/018

Abstract: Methods and apparatuses for hiding and extracting data based on a pilot code sequence are provided. A data hiding method may include converting an input audio signal to a frequency domain, distorting phase information of the audio signal converted to the frequency domain based on a pilot code sequence representing data to be hidden, and converting the audio signal with the distorted phase information to a time domain and transmitting the audio signal converted to the time domain. The pilot code sequence may be a set of phase values corresponding to a bit value “0” or “1” of data.