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 Features
The TW2824 has four high quality NTSC/ PAL video decoders, dual color display controllers and dual video encoders. The TW2824 contains four 10bit Analogto-Digital converters, proprietary digital gain/clamp controller, high quality Y/C separator to reduce cross-noise and high performance dual scaler to provide various pictures. Four built-in motion and blind detectors can increase the feature of security system. The TW2824 has flexible video display controller including QUAD and MUX basic functions. The TW2824 also has excellent graphic overlay function which displays character/ bitmap, box and mouse pointer. The TW2824 contains two video encoders with four 10bit Digital-to-Analog converters to provide 2 composite or S-video. The TW2824 can be extended up to 8/12/ 16 channel video controller using chip-tochip cascade connection.
Four Video Decoders
Accepts all NTSC/PAL standard formats with auto detection Integrated four anti-aliasing filters and 10-bit CMOS ADCs High performance adaptive comb filters for all NTSC/PAL standards IF compensation filter for improvement of color demodulation PAL delay lines for correcting PAL phase errors Programmable hue, saturation, contrast, brightness and sharpness Dual high performance horizontal and vertical scaler for each channel Four built-in motion detectors with 16X12 cells and blind detectors
Dual Video Controllers
Additional 1 channel digital input for playback or cascade operation Full Live/Strobe/Switch function Auto sequence switch with 64 queues and/or manual switch by interrupt. Various channel attribute control Image enhancement for still image High performance 2X zoom for horizontal and vertical direction Horizontal Mirroring Supports save and recall function Last image capture when video-loss Extendable to 8/12/16 channel video controller using cascade connection Path-to-Path cascade Character/Bitmap overlay for OSD 16 programmable single boxes 4 2-D arrayed boxes for motion result display Mouse pointer overlay
Dual Video Encoders
2 path digital outputs with ITU-R BT.656 standards 2 path analog outputs with all analog NTSC/PAL standards Supports CVBS or S-Video for each path Programmable bandwidth for luminance and chrominance path Four 10-bit video CMOS DACs 208-pin PQFP package
- Analog Quad\Mux Security System - 4/8/16 Ch. Digital Video Recorder (DVR) - Car Rear Vision System - Hair Shop system
VIN1A VIN1B
M M U U X X M M U U X X
Video Video Decoder Decoder SDRAM SDRAM OSD OSD Box Box Mouse Mouse Overlay Overlay
Video Video Encoder Encoder
VOUTYX VOUTCX
VIN2A VIN2B
Video Video Decoder Decoder
Controller Controller
ITU-R BT.656 ITU-R BT.656 Encoder Encoder VIN3A VIN3B M M U U X X Video Video Decoder Decoder
VDOUTX [7:0]
VIN4A VIN4B
M M U U X X
Video Video Decoder Decoder SDRAM SDRAM OSD OSD Box Box Mouse Mouse Overlay Overlay
Video Video Encoder Encoder
VOUTYY VOUTCY
PBIN
ITU-R BT.656 ITU-R BT.656 Decoder Decoder
Controller Controller
TW2824 208-pin PQFP package
HDAT HALE HRDB HWRB HCSB
ITU-R BT.656 ITU-R BT.656 Encoder Encoder Host & IRQ Interface Host & IRQ Interface
VDOUTY [7:0]
IRQ
TW2824 Block Diagram USA DMA
408 East Plumeria Drive, Tel: (408) 435-3888
San Jose CA 95134
Fax: (408) 435-0588
www.techwellinc.com


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