Patent ID: 8412519

Claim:
A method for embedding steganographic information into signal information of a signal encoder, comprising: providing data information, in particular voice information, as a signal to be coded; selecting steganographic information as data to be embedded, wherein said steganographic information is selected from a set of steganographic information items; and generating a code word from a provided algebraic code book using the signal encoder as a function of an algebraic construction rule based on the code elements forming the code word, so that: (a) the data information is encoded, by using the generated code word within the scope of a transmission standard which can be associated with the code book, into signal information containing the code word or pointing to the code word, in the form of an encoded signal; (b) the generated code word has an additional characteristic which can be calculated as a function of the code elements forming the code word, the additional characteristic representing the steganographic information; and (c) the code book is sub-divided as a function of the algebraic construction rule into a set of sub-code books, and in each case only one code word associated with the sub-code book selected by the steganographic information to be current embedded is output by the signal encoder.