Patent ID: 8953800
Filing Date: 2015-02-10
Classification: G10L,H04K,H04L

Abstract:
1. A method comprising: directly summing by a transmitter the amplitude of a plurality of codewords to the amplitude of a speech signal to generate a steganographic speech signal; encoding the steganographic speech signal in accordance with a voice encoding protocol to generate an encoded speech signal; decoding the encoded speech signal in accordance with the voice encoding protocol to generate an estimate of the steganographic speech signal; detecting by a receiver a framing of orthogonal codewords in the estimate of the steganographic speech signal; correlating each frame of the estimate of the steganographic speech signal with an orthogonal codeword known to the receiver, to produce a correlation; determining a matching codeword based upon the correlation; and generating an estimate of the orthogonal codeword.