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TW2802 Datasheet(PDF) 3 Page - List of Unclassifed Manufacturers |
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TW2802 Datasheet(HTML) 3 Page - List of Unclassifed Manufacturers |
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3 / 80 page  Preliminary TW2804/TW2802 Multiple Video Decoder Techwell, Inc. www.techwellinc.com Datasheet Rev. 2.4 09/09/2003 3 Introduction and Features The TW280X includes four high quality NTSC/ PAL video decoders, which convert analog composite to digital component YCbCr for security application. The TW280X contains four 10-bit A/D and proprietary digital gain/clamp controllers and utilizes proprietary techniques for separating lumin- ance & 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 security system. Features − 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 system − 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 − 128 PQFP package Applications Security systems Device Options Device Name Features TW2802 2 Channel Video Decoder TW2804 4 Channel Video Decoder Clock Generator Host Interface CLK54I HSPB HCSB HALE HRDB HWRH HDAT CLK27O IRQ ADC HS1 VS1 FLD1 ACTIV1 NVMD1 VD1[7:0] VALID1 H/V Sync Processor Color Decoder with Comb Filter H/V Scaler VIN1B VIN1A H/V Scaler Motion Detector MUX ADC HS2 VS2 FLD2 ACTIV2 NVMD2 VD2[7:0] VALID2 H/V Sync Processor Color Decoder with Comb Filter H/V Scaler VIN2B VIN2A H/V Scaler Motion Detector MUX ADC HS3 VS3 FLD3 ACTIV3 NVMD3 VD3[7:0] VALID3 H/V Sync Processor Color Decoder with Comb Filter H/V Scaler VIN3B VIN3A H/V Scaler Motion Detector MUX ADC HS4 VS4 FLD4 ACTIV4 NVMD4 VD4[7:0] VALID4 H/V Sync Processor Color Decoder with Comb Filter H/V Scaler VIN4B VIN4A H/V Scaler Motion Detector MUX |
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