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Line 23: == Transmission and storage == After line coding, the signal is put through a physical communication channel, either a [[transmission medium]] or [[data storage medium]].<ref name="paulsen">Karl Paulsen. [http://www.tvtechnology.com/media-servers/0150/coding-for-magnetic-storage-mediums/186738 "Coding for Magnetic Storage Mediums"] {{Webarchive\|url=https://web.archive.org/web/20140521215946/http://www.tvtechnology.com/media-servers/0150/coding-for-magnetic-storage-mediums/186738 \|date=2014-05-21 }}.2007.</ref><ref>{{citation\|author1=Abdullatif Glass \|author2=Nidhal Abdulaziz \|author3=and Eesa Bastaki \|url=http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1285&context=dubaipapers\|title=Slope line coding for telecommunication networks\|year=2007\|p=1537\|journal=IEEE International Conference on Signal Processing and Communication\|publisher=IEEE\|___location=Dubai\|quote=Line codes ... facilitates the transmission of data over telecommunication and computer networks and its storage in multimedia systems.}}</ref> The most common physical channels are:▼ ~~After line coding, the signal is put through a physical communication channel, either a [[transmission medium]] or [[data storage medium]].<ref name="paulsen">~~ ▲Karl Paulsen. [http://www.tvtechnology.com/media-servers/0150/coding-for-magnetic-storage-mediums/186738 "Coding for Magnetic Storage Mediums"].2007.</ref><ref>{{citation\|author1=Abdullatif Glass \|author2=Nidhal Abdulaziz \|author3=and Eesa Bastaki \|url=http://ro.uow.edu.au/cgi/viewcontent.cgi?article=1285&context=dubaipapers\|title=Slope line coding for telecommunication networks\|year=2007\|p=1537\|journal=IEEE International Conference on Signal Processing and Communication\|publisher=IEEE\|___location=Dubai\|quote=Line codes ... facilitates the transmission of data over telecommunication and computer networks and its storage in multimedia systems.}}</ref> The most common physical channels are: * the line-coded signal can directly be put on a [[transmission line]], in the form of variations of the voltage or current (often using [[differential signaling]]). * the line-coded signal (the "[[baseband]] signal") undergoes further [[pulse shaping]] (to reduce its frequency bandwidth) and then [[modulation\|modulated]] (to shift its frequency) to create an "[[RF signal]]" that can be sent through free space. Line 191 ⟶ 190: ==External links== * [https://web.archive.org/web/20130418052107/http://www.electronics.dit.ie/staff/amoloney/lecture-9.pdf Line Coding Lecture No. 9] * [http://www.fiberoptics4sale.com/wordpress/line-coding-in-digital-communication/ Line Coding in Digital Communication]

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