TW2834
4 Channel Video QUAD/MUX Controller

Key Features

• Four Video Decoders
• Four built-in analog anti-aliasing filters
• 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
  
  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
  
  Dual Video Controllers
• Full Live/Strobe/Switch function
• Various channel attribute control
• Non-realtime application such as Pseudo 8 Channel or Dual page
• Horizontal / Vertical Mirroring for each channel
• Last image capture when video-loss detected
• Auto sequence switch with 128 queues and/or manual switch by interrupt for Y Path
• Channel skip in Auto sequence switch for Y Path when video-loss detected
• Image enhancement for zoomed or still image in X Path
• High performance 2X zoom to horizontal and vertical direction for X Path
• Supports save and recall function for X Path
• Extendable up to 8/16 channel video controller using cascade connection
• Quad MUX switch with 32 queues and/or manual control by interrupt for Y Path

Description

The TW2834 has four high quality NTSC/PAL video decoders, dual color display controllers and dual video encoders. The TW2834 contains four built-in analog anti-aliasing filters, four 10-bit Analog-to-Digital converters, proprietary digital gain/clamp controller, high quality Y/C separator to reduce cross-noise and high performance dual scaler. Four built-in motion and blind detectors can increase the feature of a security system. The TW2834 has a flexible video display controller including basic QUAD and MUX functions. The TW2834 also has excellent graphic overlay function that displays character/bitmap for OSD, single box, 2D array box, and mouse pointer. The built-in channel ID CODEC allows auto decoding and displaying during playback and the additional scaler on the playback supports multi-cropping function of the same field or frame image. The TW2834 contains two video encoders with four 10-bit Digital-to-Analog converters for providing 2 composite or S-video outputs. The TW2834 also can be extended up to 8/16 channel video controller using chip-to-chip cascade connection.

Applications

• Security
• Analog Quad\Mux Security System
• 4/8/16 Ch. Digital Video Recorder (DVR)
• Car Rear Vision System