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US 2015/0317926 A1Published application
Automated measurement of differential latency between displays
AssigneeBarco N.V.
InventorsMarc LEEMAN, Patrick C. CANDRY
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AssigneeBarco N.V.
InventorsMarc LEEMAN, Patrick C. CANDRY
Estimating the term…
The present invention relates to methods or system for the measurement of differential latency between displays located at endpoints of network, displays being driven by one or more rendering machines and having means for refreshing the images on different displays at the same point in time as well as means adapted so that the content of each displayed image can only change after the completion of previous displayed frame. For example the displays can be frame locked and have double buffered swap locked memory operation. The method or system is adapted to stream test images over the network to the displays of the different endpoints. The test images are displayed on the displays. The displayed images at the different endpoints with an image recording device such as a camera. Optionally the delays can be compensated, e.g. by delaying the streams with lower latency at the level of the frame buffer (FIFO) before or after decoding. Preferably the system or method is adapted to measure end-to-end differential latency between the displays and for putting this in vector form.
A method of measurement of differential latency between displays located at endpoints of a network, displays being driven by one or more rendering machines and having means for refreshing the images on different displays at the same point in time as well as means adapted so that the content of each displayed image can only change after the completion of previous displayed frame, the method comprising:
A method of measurement of differential latency between displays located at endpoints of a network, displays being driven by one or more rendering machines and having means for refreshing the images on different displays at the same point in time as well as means adapted so that the content of each displayed image can only change after the completion of previous displayed frame, the method comprising:
The method of any previous claim wherein the displays are operated frame locked and have double buffered swap locked memory operation.
The method of any previous claim wherein the image recording device is a camera.
A system of measurement of differential latency between displays located at endpoints of a network is provided, displays being driven by one or more rendering machines and having means for refreshing the images on different displays at the same point in time as well as means adapted so that the content of each displayed image can only change after the completion of previous displayed frame, the system comprising:
A system of measurement of differential latency between displays located at endpoints of a network, displays being driven by one or more rendering machines and having means for refreshing the images on different displays at the same point in time as well as means adapted so that the content of each displayed image can only change after the completion of previous displayed frame, the system comprising:
A display unit for measurement of differential latency between displays located at endpoints of a network, the display unit comprising:
A display unit for measurement of differential latency between displays located at endpoints of a network, the display unit comprising:
Dependencies are inferred from the claim text.