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Introduction
This
AL240 Evaluation Kit is specially designed
for evaluating the AL240 Adaptive Low
Power Video Decoder. The Evaluation kit
allows maximum flexibility for optimizing
various input and output modes for specific
applications. Using the hardware and software
provided in the Evaluation Kit, Standalone
and PC-Based mode can be demonstrated.
The most recent version provides Binary
Switch, Fast Channel Switch, Close Caption
VBI detect and display.
AL240
Adaptive Low Power Video Decoder
The AL240 is a silicon efficient, cost
effective high video quality NTSC/PAL
SECAM video decoder with high quality
Y/C separation process. The AL240 decodes
NTSC/PAL SECAM composite video or S-video
and converts it into YUV 4:2:2, 8-bit
ITU 656 digital video output. Employing
adaptive filter technology, the AL240
is able to provide clear Y/C separated
signals while maintaining excellent frequency
response. The result is sharp, high detail
video that eliminates unwanted dot crawl
and false color effects. Fully programmable
video characteristic control, such as
hue, contrast, brightness, saturation,
are supported. The AL240 decoder incorporates
an advanced vertical blanking interval
(VBI) data processor to do data slicing,
parsing and decoding teltext, closed caption,
and other formats. Two wires of fast channel
switching input allow the decoder to do
an instant alternation of analog CVBS
input from one to the other. Up to 4 serial
bus addresses can be selected via 2 configuration
pins that allow multiple AL240 chips on
the design without extra logic.
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Features
- Decodes
NTSC, PAL and SECAM composite video
or S-video
- Supports
all variations of the NTSC standard
– (M, 4.43)
- Supports
all variations of the PAL standard –
(I, B, G, H, D, N, M, combination N)
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4 analog inputs with internal switches
among four input - e.g. 4xCVBS, 2xS-Video
or
(2xCVBS & 1xS-Video)
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Standard 8-bit ITU-R.BT656 along with
separate sync signals, YCbCr 4:2:2 format
output
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Excellent quality Y/C separation –
minimizes cross Luma and cross color
effects
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Adaptive Comb Filter for NTSC&PAL
Y/C separation
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BCS (Brightness/Contrast/Saturation
and Hue) control
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Supports VBI decoding
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Decodes weak and noisy off-air signals
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Hardware channel switching
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Two-wire serial bus programming with
up to 4 serial bus sub-addresses selectable
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