doi:10.17181/CERN.5F5X.FDJMengCERN. Geneva. The LHC experiments CommitteeLHCb Trigger and Online Upgrade Technical Design ReportDetectors and Experimental TechniquesCERN-LHCC-2014-016LHCB-TDR-016The LHCb experiment will be upgraded between 2018 and 2019 in order to reach unprecedented precision on the main observable of the b and c-quark sectors. This Technical Design Report addresses the trigger-less readout system and the full software trigger features.2014-05-14http://cds.cern.ch/record/170136110.17181/CERN.5F5X.FDJMhttp://cds.cern.ch/record/1701361oai:cds.cern.ch:1701361Pierluigi.Campana@cern.chRolf.Lindner@cern.chCarmelo.D'Ambrosio@cern.chBernhard.Spaan@tu-dortmund.de