The video pixel decoder VPX® 322xF is the fourth generation of full-feature video acquisition ICs for consumer video and multimedia applications. All of the processing units necessary to convert an analog video signal into a digital component stream have been assembled on a single 44 or 64-pin IC. Additionally, the VPX 322xF provides VBI data acquisition and processing. An adaptive 4H comb filter allows improved Y/C separation. Moreover, the VPX 322xF provides an analog component video interface. The 44-pin version (VPX 3226F) is pin-compatible to the VPX 322xE. |
System ArchitectureThe block diagram illustrates the signal flow through the VPX 322xF. The analog front-end performs input selection, clamping, AGC, and A/D conversion allowing CVBS, S-Video and YPrPb input. The color decoder separates the luma and chroma signals, demodulates the chroma and filters the luminance. The video processing stage resizes the YPrPb samples, adjusts the contrast and brightness, and interpolates the chroma. The closed caption and teletext slicers extract lines with text information and deliver decoded data bytes to the video interface.The VPX 322xF is register-compatible to the VPX 322xE. For further information please contact .
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| Block diagram of the VPX 322xF |
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New Features (over VPX 322xE)
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New small-outline package (PQFN64-1)
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Analog YPrPb input (480i, 525i)
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Seven analog inputs with integrated selector for:
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4 composite video (CVBS) sources, or
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2 CVBS and 2 Y/C sources (S-Video), or
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2 CVBS, 1 Y/C and 1 YPrPb source
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Access of closed caption and CGMS data via I2C
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20.25 MHz reference clock output
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Full-field mode of closed caption slicer
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Direct output of status bits (ASR) through Port B
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Violence blocking capability (V-chip)
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Video Decoding
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High-performance adaptive 4H comb filter Y/C separator with adjustable vertical peaking
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Multistandard color decoding:
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NTSC-M, NTSC-443
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PAL-BDGHI, PAL-M, PAL-N, PAL-60
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SECAM, S-Video
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Video ADCs with clamping and automatic gain control (AGC)
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Video Processing
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Hue, brightness, contrast, and saturation control
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Dual-window cropping and scaling
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Horizontal resizing between 32 and 864 pixels/line
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Vertical resizing by line-dropping
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High-quality anti-aliasing filter
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Scaling-controlled peaking and coring
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Video Interfacing
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Digital YCrCb 4:2:2 format
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ITU-R 601/656 compliant output format
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Square pixel format (640/768 pixels/line)
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8-bit or 16-bit synchronous output mode
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13.5 MHz/16-bit and 27 MHz/8-bit output rate
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VBI bypass and raw ADC data output
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Data Broadcast Support
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High-performance hardware data slicing
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Data slicer supports closed caption (1×, 2×), XDS, CGMS, NABTS, WST, VPS, WSS, Antiope
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Programmable mode for different data services
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Simultaneous acquisition of closed caption, WST, VPS, and WSS
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VBI and full-field mode
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Data insertion into video stream
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Miscellaneous
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64-pin PMQFP64-2/PQFN64-1 packages (VPX 3228F) and 44-pin PMQFP44-1 package (VPX 3226F)
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Reduced power consumption of about 500 mW
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I2C serial control, two different device addresses
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On-chip clock generation, single crystal
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Eight user-programmable I/O pins
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