In the book we talk about dab + digital radio. We will meet with dab + headend, he-aac2v2 audio coding, then on software applications. We will talk about DAB + contribution and distribution, technical-technological solutions in the selection and functions of DAB + head end. We will then talk about the up-grading of the existing transmitters and in the end, we will compare the existing analog FM radio system and digital DAB + system.