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We noticed that a lot of misunderstandings exists between these two mnemonics used in DAB\/DAB+ literature. Both ETI<\/strong> and EDI<\/strong> are used to interface the MUX output to the transmitter input.<\/p>\n\n\n\n ETI<\/strong> (E<\/strong>nsemble T<\/strong>ransport I<\/strong>nterface) is to be seen as a general name for the interface between the DAB-MUX and the DAB-transmitter. More specific we could talk about the ETI-LI<\/strong> (LI = Logical<\/strong> Frame<\/strong>). This frame is the basic ETI-frame which we need to be transported between the two devices DAB-MUX and DAB-Transmitter.<\/p>\n\n\n\n In addition we will see different standard and non-standard ways to transport this logical frame. These more specific interfaces will be defined by the extension following te mnemonic such as ETI-NI, ETI-NA and ETI-EDI. <\/p>\n\n\n\n EDI<\/strong> is only one of the available transport methods<\/strong> under which ETI<\/strong> can be transported. Most of the time the mnemonic is used on his own without the prefix ETI.<\/p>\n\n\n\n In fact we can say that both are ETI-signals although EDI is the envelope<\/strong> in which ETI is transported. Any transport of ETI over IP-networks will be called an EDI- interface because ETI will always be transported in an EDI-envelope when transported over IP-networks.<\/p>\n\n\n\n When we put data into a specific envelope we speak about encapsulation<\/strong>. This leads us finally to the name EDI<\/strong> which means E<\/strong>ncapsulation of D<\/strong>AB I<\/strong>nterfaces. Later we will see that the EDI-envelope will also be used for the STI-interface.<\/p>\n\n\n\n Further ETI can also be transported over other types of networks. Momentary two versions ETI-NI <\/strong>(Network Independent) and ETI-NA<\/strong> (Network Adapted) interfaces exist. We will look into this in the future.<\/p>\n\n\n\n <\/p>\n\n\n\n <\/p> Be aware that ETI is a mnemonic usually used in a broad range of meanings<\/em>.<\/strong> In whatever format the ETI-information is transported it is important to know that the information need to be received every 24<\/span> milliseconds by the transmitter! <\/em><\/strong><\/p> <\/p><\/blockquote>\n\n\n\n Conversion from from ETI-signals to (ETI-)EDI and vice versa is possible with commercial available equipment and ODR-software. <\/p>\n\n\n\n
It does not say which <\/b><\/em>underlying protocol will be used to transport it nor will it say something about the specifications of the physical interface (such as electrical and physical (connector) characteristics)!<\/em><\/strong><\/p>