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Technical Committee on Human Factors - Guidelines for real-time communication services
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Frame-rate/resolution
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How is Res perceived?
Pixels per second
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Frame-rate/resolution ratio
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Frequently asked questions
What does CIF stand for?
How many pixels are there in CIF?
How many pixels are there with an XGA PC-screen resolution?
What is the abbreviation FPS?
What is the maximum number of frames pr second that is used in digital systems?
Why is the Framerate-Resolution ratio important?
Can Framerate-Resolution ratio be modified independently of resolution, and vice-versa?
1. What does CIF stand for?
Common Intermediate Format.
2. Does CIF stand for “Cost, Insurance & Freight”?
Yes, but not in the context of this lesson.
3. How many pixels are there in CIF?
352x288 pixels. These sums up to 101.376 pixels.
4. How many pixels are there with an XGA PC-screen resolution?
1024x768 pixels. These sums up to 786.432 pixels.
5. What is the abbreviation FPS?
Frames pr second.
6. What is the maximum number of frames pr second that is used in digital systems?
30 FPS.
7. Can Framerate be modified independently of Resolution, and vice-versa?
No, not with the same bit-rate, quantisation level and processor capacity.