Apparatus and Method for controlling the copy and play of a digital audio contents using digital watermarking

PURPOSE: A device and a method for controlling the copy and reproduction of a digital audio production using digital watermarking are provided to display the possibility of copy and reproduction, through real-time insertion and extraction of a series of bit information in a digital audio production, and to generate signals to prevent the copy and distribution of the digital audio production when information on codes incapable of being copied and reproduced are detected. CONSTITUTION: In a control codes insertion device, a control codes distribution point deciding unit decides a point of time to distributively insert control codes in a digital audio production. A control codes inserting unit designs filters corresponding to the control codes, and inserts the control codes in the digital audio production through the filtering of the designed filters at the decided point of time. And a digital audio signals summing unit sums digital audio signals in which the control codes are inserted and digital audio signals in which the control codes are not inserted as one audio file. In a control codes extraction device(2), a distributed information collecting unit(21) collects information on the distributively inserted control codes. A control codes sorting unit(22) sorts out only the control codes from the collected information. And a code decoding and command signal generating unit(23) decodes an instruction of the sorted control codes to generate an instruction signal.