Daewoo DTF-2950-100D, Руководство по обслуживанию, Страница: 26 / 92

CP-850FX Service Manual
Europe R&D 25
4.3 DDP 3315C – DISPLAY AND DEFLECTION PROCESSOR
The DDP 3315C is a mixed-signal single-chip digital display and deflection processor, designed
for high-quality backend applications in double scan and HDTV TV sets with 4:3 or 16:9 picture
tubes. The interfaces qualify the IC to be combined with state of the art digital scan rate
converters, as well as analog HDTV sources. The DDP 3315C contains the entire digital video
component, deflection processing, and all analog interfaces to display the picture on a CRT.
4.3.1 BLOCK DIAGRAM OF THE DDP 3315C
4.3.2 DESCRIPTION
Video Processing
– linear horizontal scaling (0.25 ... 4), as well as nonlinear horizontal scaling “panorama vision”
– dynamic black level expander
– luma sharpness enhancement by dynamic peaking and luma transient improvement (LTI)
– color transient improvement (CTI)
– programmable RGB matrix
– black stretch, blue stretch, gamma correction via programmable Non-linear Colorspace
Enhancer (NCE) on RGB
– two analog double scan inputs with fast blank (one RGB and one RGB/YC r C b /YP r P b
selectable)
– average and peak beam current limiter
– automatic picture tube adjustment (cutoff, drive)
– histogram calculation
Deflection Processing
– scan velocity modulation output
– digital EHT compensation for vertical / east-west
– soft start/stop of horizontal-drive
– vertical angle and bow correction
– differential vertical outputs
– vertical zoom via deflection adjustment
– horizontal and vertical protection circuit
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