TW2804
4-in-1 NTSC/PAL Video Decoder for Security Applications

Key Features

• Four Video Decoders
• Accepts all NTSC (M/N/4.43) / PAL (B/D/G/H/I/K/L/M/N/60) standard formats with auto detection
• Four 10-bit video CMOS analog to digital converters
• Adjust video level with proprietary automatic clamp and gain control
• Proprietary architecture for locking to weak, noisy, or unstable signals
• 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 quality horizontal and vertical down scaler for each channel
• Four built-in motion detectors for security system
• Supports the standard ITU-R BT.656 / 8bit ITU-R BT.601 format
• Supports two differently scaled output mode with 54MHz ITU-R BT.656 format
• Supports a two-wire serial or parallel interface
• Low power consumption

Description

The TW2804 includes four high quality NTSC / PAL video decoders, which convert analog composite to digital component YCbCr for security applications. The TW2804X contains four 10-bit A/D, proprietary digital gain/clamp controllers, and utilizes proprietary techniques for separating luminance & chrominance to reduce both cross-luminance and cross-chrominance artifacts. The high performance dual scalers in each channel offer two differently scaled video outputs with 54MHz ITU-R BT.656 format for security system design. Four built-in motion detectors can also increase the feature of a security system.

Applications

• Quad/Mux Systems
• 4ch/8ch/16ch DVR