Video Encoder/Decoder 4ADC 4DAC 10-Bit 208-Pin PQFP

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 free scaler. Four built-in motion and blind detectors can increase the feature of the security system. The TW2834 has a flexible video display controller including basic QUAD and MUX functions. The TW2834 also has an 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 multicropping 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. The TW2834 also can be extended up to 8-/16-channel video controller using chip-to-chip cascade connection.

• Accepts all NTSC/PAL standard formats with auto detection
• Integrated four analog anti-aliasing filters and four 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
• High performance horizontal and vertical scaler for each path including playback input
• Fast video locking system for non-real-time applications
• Four built-in motion detectors with 16x12 cells and blind detectors
• Additional digital input for playback with ITU-R BT.656 standard
• Auto cropping/strobe for playback input with Channel ID decoder
• Supports 4-channel full D1 record and playback mode
• Full live/strobe/switch function
• Various channel attribute control
• Supports pseudo 8-channel or dual page mode
• 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 record path
• Channel skip in auto sequence switch for record path when video-loss detected
• Image enhancement for zoomed or still image in display path