saf7118 NXP Semiconductors, saf7118 Datasheet
saf7118
Manufacturer Part Number
saf7118
Description
Multistandard Video Decoder With Adaptive Comb Filter And Component Video Input
Manufacturer
NXP Semiconductors
Datasheet
1.SAF7118.pdf
(170 pages)
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1. General description
The SAF7118 is a video capture device for applications at the image port of Video
Graphics Array (VGA) controllers.
Philips X-VIP is a new multistandard comb filter video decoder chip with additional
component processing, providing high quality, optionally scaled and video.
The SAF7118 is a combination of a four-channel analog preprocessing circuit including
source selection, anti-aliasing filter and Analog-to-Digital Converter (ADC) with
succeeding decimation filters from 27 MHz to 13.5 MHz data rate. Each preprocessing
channel comes with an automatic clamp and gain control. The SAF7118 combines a
Clock Generation Circuit (CGC), a digital multistandard decoder containing
two-dimensional chrominance/luminance separation by an adaptive comb filter and a high
performance scaler, including variable horizontal and vertical up and downscaling and a
brightness, contrast and saturation control circuit.
It is a highly integrated circuit for desktop video and similar applications. The decoder is
based on the principle of line-locked clock decoding and is able to decode the color of
PAL, SECAM and NTSC signals into ITU 601 compatible color component values. The
SAF7118 accepts CVBS or S-video (Y/C) as analog inputs from TV or VCR sources,
including weak and distorted signals as well as baseband component signals Y-P
RGB. An expansion port (X port) for digital video (bidirectional half duplex, D1 compatible)
is also supported to connect to MPEG or a video phone codec. At the so called image port
(I port) the SAF7118 supports 8-bit or 16-bit wide output data with auxiliary reference data
for interfacing to VGA controllers.
The target application for the SAF7118 is to capture and scale video images, to be
provided as a digital video stream through the image port of a VGA controller, for capture
to system memory, or just to provide digital baseband video to any picture improvement
processing.
The SAF7118 also provides a means for capturing the serially coded data in the Vertical
Blanking Interval (VBI) data. Two principal functions are available:
The SAF7118 also incorporates field-locked audio clock generation. This function ensures
that there is always the same number of audio samples associated with a field, or a set of
fields. This prevents the loss of synchronization between video and audio during capture
or playback.
1. To capture raw video samples, after interpolation to the required output data rate, via
2. A versatile data slicer (data recovery) unit
SAF7118
Multistandard video decoder with adaptive comb filter and
component video input
Rev. 03 — 16 February 2006
the scaler
Product data sheet
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