An algorithm for watermarking DSP system

An DSP algorithm of watermarking was addressed. In general, watermarking used for information hiding could be held up by the software inserting method and its usefulness is lost. A DSP card designed in this paper, which is connect to a PC parallel port, can avoid the software hold up. This is a hardware watermarking insertion system and cannot be controlled by the PC software so it is a safe watermarking insertion system.