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Plasma TV Service Manual 05/01/2006
12.22. SAA7118E
12.22.1. General Description
The SAA7118E is a video capture device for applications at the image port of VGA controllers. Philips
X-VIP is a new multistandard comb filter video decoder chip with additional component processing,
providing high quality, optionally scaled, video.
The SAA7118E is a combination of a four-channel analog preprocessing circuit including source
selection, anti-aliasing filter and ADC, an automatic clamp and gain control, 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 colour of PAL, SECAM and NTSC
signals into ITU 601 compatible colour component values. The SAA7118E 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
B
-P
R
or RGB. An expansion port (X-port) for digital video
(bidirectional half duplex, D1 compatible) is also supported to connect to MPEG or video phone codec.
At the so called image port (I-port) the SAA7118E supports 8 or 16-bit wide output data with auxiliary
reference data for interfacing to VGA controllers.
The target application for the SAA7118E is to capture and scale video images, to be provided as 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.