Digital Signal Processing (DSP) is the study of signals in a digital representation and of the processing methods of these signals. Examples of digital signals include speech in mobile phones, digital audio in CDs & mp3-players, biomedical imaging in digital tomography, images & video in digital cameras, and measurement signals in different industrial devices. Digital signal processing is useful in situations where the physical world and computers meet, which means that there are lot of applications & new ones will emerge as the methods used in the field are developed. Digital signal processing technique has been applied on the genomic data sequences in order to identify and compare DNA & protein sequences of Eucalyptus grandis to the other available higher plant plastomes.