Protocol stack From an OSI model protocol stack viewpoint, the technologies used on DAB inhabit the following layers: the audio codec inhabits the presentation layer. Below that is the data link layer, in charge of statistical time-division multiplexing and frame synchronization. Finally, the physical layer contains the error-correction coding, OFDM modulation, and dealing with the over-the-air transmission and reception of data. Some aspects of these are described below.
Protocol stack From an OSI model protocol stack viewpoint, the technologies used on DAB inhabit the following ,layers: the audio codec in.habits the presentation layer. Below that is the data link layer, in charge of statistical time-division multiplexing and frame synchronization. Finally, the physical layer contains the error-cor,rection coding, OFDM modulation, and dealing with the over-the-air tran.smission and reception of data. Some aspects of these are described below.