Technical data

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Chapter 1
1. DVP Specifications
This chapter describes the DVP Specifications. It contains the following sections:
• Overview
• Physical Characteristics
• Signal Descriptions
• Electrical Considerations
• 16-bit Luminance
• Video Format Programming
• Genlock DG4 to External Sources
• Signal Lists
Overview
The InfiniteReality
™
Digital Video Port (DVP) provides digital video data from the
InfiniteReality frame buffer in raster-scan order, left-to-right, top-to-bottom, one pixel at
a time, at the pixel clock rate. Pixel data is 36 bits wide (12 bits per component, RGB).
Support is also provided for accessing 16-bit luminance information. (See “16-Bit
Luminance” on page 11 for more information.)
Latency
The DVP minimizes latency to video data. Typically, there is less than one horizontal
period of latency in the video data. The exact latency depends on the particular video
format and the pixel clock speed. There are three distinct “break-points”: 2.5 to 60
Mpix/sec, 60 to 120 Mpixels/sec, and 120 to 230 Mpixels/sec. The highest clock rate adds
3 pixel clocks of delay, the mid-range adds a total of 2 pixel clocks of delay, and the low
range adds no delay. In all three cases, the relationship of CBLANK_{H,L} to video data
is constant. (See “Timing Signals” on page 5 for more information.) The latency is