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Functional
Description
The AL240 is 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 convert it into YCbCr 4:2:2, 8-bit digital video
output. Employing adaptive filter technology, the AL240
is able to provide a 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 controls, 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
teletext, closed caption, and other formats. Two wires
of hardware channel switching inputs allow decoder to do
an instant alternation of analog CVBS inputs from one to
the other. Up to 4 serial bus addresses can be selected
via two configuration pins that allow multiple AL240
chips on the design without extra logic.
The
AL240 supports power saving mode and operates under the
low power voltages (3.3V and 1.8V) in 44-pin Lead Free (PBF)
QFP package.
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Applications
* Video Surveillance Systems
* Mobile
System
* Handheld Application
* Video Capture
Devices
* Video Phone
* Networking Video, etc.
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- Decodes NTSC, PAL and SECAM composite video or S-video
- Supports all variation of the NTSC and PAL standard - I,
B, G, H, D, N, M, combination N
- Standard 8-bit ITU 656 along with separate sync
signals YCbCr 4:2:2 format output
- Excellent
quality Y/C separation - minimizes cross luma and cross
color effects
- Auto detects and locks VCR trick
modes
- Decodes weak and noisy off-air signals
- Fast lock on channel switching, etc.
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