SAA7154E/V2/G,557 NXP Semiconductors, SAA7154E/V2/G,557 Datasheet - Page 25

• Manufacturer Part Number: SAA7154E/V2/G,557
• Manufacturer: NXP Semiconductors

Specifications of SAA7154E/V2/G,557

• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: LBGA
• Pin Count: 156
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
SAA7154E_SAA7154H_2
Product data sheet
7.6.2 Scaler
The high-performance video scaler offers non-linear horizontal scaling, thus enabling e.g.
optimized zooming of 4 : 3 sources to a 16 : 9 display (panorama scaling). An intrafield
de-interlacer (no external memory needed) converts interlaced sources to progressive
format, suitable for direct display on LCD panels. An on-chip display and raster generator
enables direct driving of LCD panels.
The scaler has the following major blocks (see
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Acquisition control (horizontal and vertical timer) and task handling (region/field/frame
based processing)
Prescaler, for horizontal down-scaling by an integer factor, combined with appropriate
band limiting filters, especially anti-aliasing for CIF format
Brightness, saturation, contrast control to adjust scale-dependent amplification
Line buffer, with asynchronous read and write, to support vertical up-scaling (e.g. for
videophone application, converting 240 into 288 lines, Y-C
Vertical scaling, with phase accurate Linear Phase Interpolation (LPI) for zoom and
downscale or phase accurate Accumulation Mode (ACM) for large downscaling ratios
and better alias suppression
A secondary vertical scaling unit, for EDGI, used for zooming up to progressive line
counts
Arithmetic unit, which does the calculations needed to support panorama scaling
and keystone compensation
Picture improvement processing (scaler post processing) containing simple peaking
functions to improve the sharpness impression in luminance and chrominance, YUV
to RGB or RGB to YUV conversions (including 16 segment curves) to support
contrast/saturation and color manipulations
Variable Phase Delay (VPD) operates as horizontal phase accurate interpolation for
arbitrary non-integer scaling ratios. VPD supports conversion between square pixel
sampling and rectangular pixel sampling, panorama scaling and keystone
compensation.
Rev. 02 — 6 December 2007
SAA7154E; SAA7154H
Multistandard video decoder with comb filter
Figure
12):
B
-C
R
4 : 2 : 2)
© NXP B.V. 2007. All rights reserved.
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