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TW2851
Advanced 4-Channel A/V Decoder, MUX and Display Processor
Analog Video Decoder
Record
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Accepts all NTSC(M/N/4.43)/PAL(B/D/G/H/I/K/L/M/N/60) standards
with auto detection
8 analog CVBS inputs for pseudo 8 channel support
Integrated analog anti-aliasing filters & 10-bit ADCs
High performance adaptive 4H comb filters for all NTSC/PAL
standards
Proprietary fast video locking system for non-realtime application
Noise reduction algorithm to remove impulse noise
Independent & flexible video scalars for display, record and
SPOT path
Four built-in 16x12 matrix motion/blind/night detectors
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S upp orts BT.656, BT.601 & BT.1120 formats
Record Resolutions: Full D1, Half D1 and CIF
Programmable Frame Rates: 1 to 30 fps Flexible Record
Output Functions
? Real time & non-real time recording over 27/54MHz clo ck
? Field switching record mo des support up to 120 fields per
second
Embedded Motion Detection & Channel ID Encoder
6-Layer Graphic Overlay with Independent 16-bit Bitmap OSG
Window for Each Record
Optional multiplexed digital video output for network function
Display
Playback
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Displays up to 32 windows on PC monitor or LCD panel
? H/V Scaling & Mirroring for Each Window
? Live & Playback Video Tiling on Same Display
Last field/frame image captured when video loss detected
Live or strobe capture for pseudo 8-ch mode
Supports dual monitors: Main & Secondary
Main Display (RGB/LVDS Interface)
? Up to WXGA+ resolution
? Built-in Video Scalar & 2D De-interlacer
? 7-Layer Graphic Overlay including Dual 16-bit Bitmap OSG Layers
Secondary Display (CVBS Interface)
? Built-in Video Scalar & NTSC/PAL Encoder
? 5-Layer Graphic Overlay including Dual 16-bit Bitmap OSG Layers
SPOT Display (CVBS Interface)
? Displays up to 16 channels of live camera
? 6-Layer Graphic Overlay including Dual16-bit Bitmap OSG Layers
– Flexible playback ports supporting BT.656, BT.601, BT.1120 & 24-bit
RGB formats
– Supports up to 16-ch non-realtime playback
– Supports 4-ch D1 or 16-ch CIF realtime playback
– Auto cropping & strobe with channel ID decoder for multi-channel
playback input
Other Features
– Integrated Audio Codec
– Single DDR SDRAM Memory Controller
– 8/16-bit Parallel Host Interface
– 8/12/16-channel Cascade Support
– 1.2V, 3.3V Supply
– Package: 352-PBGA, 27x27x2.23 mm
Block Diagram
A
TEL 1-888-INTERSIL www.intersil.com
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