[Techwell]

Introduction

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.

Features

- 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

Applications

- Analog QuadMux Security System

- 4/8/16 Ch. Digital Video Recorder (DVR)

- Car Rear Vision System

- Hair Shop system