Barco LIDO Brochure/Spec Sheet - CurtPalme.com

BARCO’s digital Line Doublerincorporates adaptive line and fieldmemory processing to significantlyreduce visible line structure in theprojected image.The result is asmoother, more film-like image.Picture left: standard video projection.Picture right: video projection withBARCO’s built-in LIDO(Actual projected images).CleansignalFast PLLPrevious linewith Sync noise trackingNext linewith noiseVideo signalSyncSync trackingSync trackingSlow PLLSync trackingSync trackingSync trackingProjected vertical line with fast PLLThe PLL circuit for the sampling of thevideo signal in the LiDo locks on thesync signal.A slow PLL is not sensitive for noise, buthas a slow response to shifts in the syncsignal (e.g. with poor quality VHS tapes),which results in a ‘bending’ at the top ofthe image.A fast PLL immediately responds to syncshifts, but results in jitter of the videoimage when there is noise in the syncsignal.BARCO has designed an advancedPLL circuit, which has a fast response tosync shifts, but eliminates the influence ofnoise.CleansignalSync trackingSync trackingProjected vertical line with slow PLLPoorqualitytapesSync trackingSync trackingnLine nSync trackingSpecially designed PhaseLocked Loop (PLL) circuitIn BARCO’s LiDo, the incomingvideo signal is sampled before itis processed. A special PLL circuit,locked on the sync signal, is usedto synchronize the sampling ratewith the video signal.Fast PLL circuits immediatelyrespond to sync shifts (e.g. withpoor quality VHS tapes), butresult in image jitter when thereis a lot of noise in the sync signal.Slow PLL circuits are not sensitivefor noise, but have a slowresponse to shifts in the syncsignal, which results in a bendingof the image. BARCO’s speciallydesigned PLL circuit eliminatesthe influence of noise and syncshifts, which results in a verygood and stable image quality.