A dependency-light Python script (standard library only) that estimates the cost of every ITU subjective test method for a planned test. From your number of conditions, viewers, clip length, vote time, and fatigue-limited session length, it computes for ACR, ACR-HR, DCR, CCR, and Pair Comparison the ratings or pair count, clip views, total viewing time, and sessions required per viewer; it computes the full pair count as N*(N-1)/2, flags when full Pair Comparison exceeds a reasonable number of s
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The handbook · 7 volumes
Fora Soft Video Engineering Handbook
This planner estimates viewing time and sessions for ACR, ACR-HR, DCR, CCR and Pair Comparison so you pick a method you can afford. Our seven-volume handbook frames that choice: Volume 1 on objective quality metrics and encoder comparisons, Volume 3 on QoE monitoring in delivery, and Volume 6 on AI models built on subjective scores. Written by Nikolay Sapunov, CEO at Fora Soft.
Choosing between ACR, DCR and pair comparison for your quality test?
Tell us your conditions and budget: we return the method that fits, the viewer count and a schedule for running the test. 250+ video products shipped since 2005.
You get a realistic estimate, technical recommendations and next steps. Free, no obligations.
