ISF Video Standards & Signal Processing 2

Question 1

What is the active line period in a 1080i/60 signal?

Accepted Answer

The time during which picture content is transmitted on each line

Answer

The active line period is the portion of each horizontal line interval during which actual picture (luminance and chrominance) data is transmitted.

Question 2

In HDMI, what does the term 'deep color' refer to?

Accepted Answer

Higher color bit depth beyond 8 bits per channel (e.g., 10 or 12 bits)

Answer

Deep color in HDMI refers to color bit depths greater than 8 bits per channel, allowing 10, 12, or 16 bits per channel to reduce banding.

Question 3

Which chroma subsampling scheme retains the most color information?

Accepted Answer

4:4:4

Answer

4:4:4 subsampling samples both luma and both chroma channels at full horizontal and vertical resolution, preserving all color detail.

Question 4

What is the purpose of pre-emphasis in video signal transmission?

Accepted Answer

To boost high-frequency components before transmission to compensate for cable losses

Answer

Pre-emphasis boosts high-frequency signal components before transmission so that after the cable attenuates those frequencies, a flat response is restored.

Question 5

What does the CIE 1931 xy chromaticity diagram represent?

Accepted Answer

A 2D map of all colors visible to the human eye, independent of luminance

Answer

The CIE 1931 xy chromaticity diagram plots all perceivable colors as a 2D horseshoe shape, with luminance (Y) factored out.

(ISF) Imaging Science Foundation Certification Practice Test

(ISF) Imaging Science Foundation Certification Practice Test

ISF Video Standards & Signal Processing 2