Latency Compensation Progress

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Latency Compensation Progress

• Jason Jerald
• November 11th, 2003

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• External system nearly complete
• High resolution to low resolution timing issues
• Use 800x600 on both input and output but display
  only 640x480 on output
• Sending the predicted angle alpha
• If waiting to swap on vertical sync
• Send as the upper-left pixel of the frame
• If not waiting to swap on vertical sync
• Send as the left-most pixel of each scanline
• Two time signals
• Gyro integration for current video output
• Gyro integration for current rendering
• Swap these values on each buffer swap
• All integer input
• Predicted angle alpha in pixels
• Integration angle Beta is converted to pixels
  before subtraction by lookup table

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Gyro
A2D
A2D
Integration angle offset ß
time
ß
Predicted angle offset a
? a - ß
Tracker
?
Predictor
SRAM Controller
CRT
Renderer
D2A
DVI IN
video
Application
ICC
PC