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EPIX Image Flow

PVS-100 utilizes the EPIX PIXCI™-SV5 solution for Analog Sensors

PVS-100 Standard Configuration incorporates the EPIX PIXCI™-SV5 imaging board (SV5 Rev 1.0 shown).

Video Capture for the PCI Bus

The PIXCI-SV5 imaging board, for the PCI bus, is designed to take advantage of the power of the host computer.  Applications once restricted by limited memory or processing power can now be easily accomplished with the PIXCI-SV5 imaging board and a compatible PCI computer.

ACQUISITION -- A unique digital genlock circuit ensures precise synchronization of every image.  The PIXCI-SV5 imaging board automatically recognizes unstable signals (for example, from a VCR) and adapts its locking mechanism to accommodate the source.

A video input multiplexer allows software selection from two BNC and one S-Video input.   Programmable gain, hue, brightness, saturation, and contrast adjustments condition the video signal.

Image sequences may be transferred at full or reduced frame rates to the PCI bus for storage in the host computer's memory, or passed to other devices on the PCI bus such as disk controllers or VGA adapters.

SCALING AND CROPPING -- The window of video to be captured may be cropped in single pixel increments, then scaled in ratios from 1:1 to 1:14, down to as few as 4 pixels by 1 line of image data.  Horizontal and vertical scaling is performed in real-time by interpolation, providing an accurate representation of the original image.

DISPLAY -- Depending on the computer's VGA adapter, 24 bit RGB color images or 8 bit monochrome images may be displayed.  The full, scaled, or cropped image may be placed anywhere on the VGA screen.   Luminance or monochrome image data can be passed directly to the VGA for live video-in-a-window display. Color images are normally stored in the host computer's memory, converted into RGB data, then displayed on the VGA adapter.  With a fast processor, fast PCI bus, and fast VGA adapter, live color image data may be displayed.  If the VGA adapter can accept Y/C color pixels, images can be sent from the PIXCI-SV4 to the VGA adapter across the PCI bus.

TRANSFER RATES -- The PIXCI-SV4 imaging board is designed to use the 132 Mbytes/sec burst mode transfer rate of the PCI bus.  As a bus master, the PIXCI-SV4 imaging board sends image data to the PCI bus; it does not wait for the computer's CPU to read images from the board into PC memory.

I/O CONTROL -- Four input and four output TTL trigger signals are available for synchronization with external events right on the imaging board.

Special Features:

  • Compact PCI Board
  • Supports multiple video formats (NTSC, RS-170, CCIR, PAL)
  • Window NT Plug 'N Play operation
  • PCI Bus Mater
  • Real-Time transfer to PCI Bus


MUX -- The multiplexer selects the video source for the Programmable Gain from either the S-Video input connector or from the composite video source on the BNC connector. The multiplexer may be switched during vertical blanking.

Programmable Gain -- Compensates for reduced amplitude in the analog signal input. Gain can be programmed from O% to more than 200%.

Luminance A/D -- Provides analog to digital conversion of NTSC, RS-170, CCIR, PAL, and the luminance (Y) component of S-Video sources.

Chrominance (Color) A/D -- Provides analog to digital conversion of the color (C) component of S-Video.

Decoder -- Separates the Y/C components. Generates the U/V color difference signals.

Digital Genlock -- Automatic synchronization circuitry for precise digitization. Accommodates video sources which have variable periods, such as video tape recorders. Generates the pixel clock for transferring image data to the PCI bus interface.

Scaling, Clopping -- Interpolation is used to scale images to 1/14 of their original size.

Temporal Scaling -- Image sequences may be captured at full or reduced frame rates.

Trigger I/O -- Four input and four output TTL triggers can be used for synchronization with external events. The trigger signals are controlled by the host CPU.


(Click here to see the EPIX video board image flow diagram.)


  • 4 Pin DIN: S-Video Input
  • Two BNC-Jacks: Composite Video Inputs
  • DB15: TTL I/O Triggers
  • Cables optional


  • Color or Monochrome Video Acquisition:
  • S-Video, RS-170, CCIR, NTSC, PAL
  • Resolution-Pixels:
  • 754 x 480: RS-170, NTSC, S-Video
  • 922 x 580: CCIR, PAL, S-Video


  • Monochrome: 8 bit
  • YCrCb (UYVY, YUV4:2:2): 16 bit
  • RGB: 24 or 32 bit
  • Capture Rate:
  • 30fps: RS-170, NTSC, S-VIDEO
  • 25fps:CCIR, PAL, S-VIDEO


  • Requires a PCI motherboard with burst mode to host memory data rates of at least 30 MB/S.

DISPLAY - Windows:

  • Display resolution as per installed VGA device driver.
  • A DCI compatible S/VGA adapter is required for real-time display.


  • Via Standard VGA: limited to 4 bits (l6 gray levels), non real-time display.
  • Via Super VGA: 8 bit, 256 gray level display.
  • Color display via adapters supporting 24 bit RGB.
  • S/VGA adapters must be VESA 1.0 compatible.


  • 32 bit PCI Bus Master slot
  • Power - 0.55 Amps @ +5 Volts
  • Physical board size - 4.913 in, by 3.350 in.

All data provided by EPIX, Incorporated, 1997 Epix, Inc., All Rights Reserved

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Last modified: May 25, 2016