CTS Display Technologies and Video Systems 2 — Questions and Answers
Question 1: What does HDCP protect in an AV system?
- The display from voltage surges
- Copyrighted digital content transmitted over HDMI or DVI (Correct answer)
- The color calibration profile of a monitor
- Network bandwidth on AV-over-IP systems
Correct answer: Copyrighted digital content transmitted over HDMI or DVI
HDCP (High-bandwidth Digital Content Protection) is a digital copy protection standard that encrypts the content signal between a source and a display to prevent unauthorized copying.
Question 2: A video matrix switcher is primarily used to:
- Adjust the color temperature of multiple displays
- Route any video input to any video output independently (Correct answer)
- Amplify a single video signal to multiple destinations
- Convert analog video signals to digital format
Correct answer: Route any video input to any video output independently
A video matrix switcher allows any input signal to be routed to any one or multiple outputs simultaneously and independently, providing flexible signal distribution.
Question 3: What is chroma subsampling 4:2:0 used for?
- Increasing the color depth of a video signal
- Reducing bandwidth by sampling color at a lower resolution than luma (Correct answer)
- Setting the refresh rate of a display to 420 Hz
- Defining the number of audio channels in an HDMI signal
Correct answer: Reducing bandwidth by sampling color at a lower resolution than luma
4:2:0 chroma subsampling reduces file size and bandwidth by sampling the color (chroma) information at one-quarter the rate of the luminance (luma), exploiting the human eye's lower sensitivity to color detail.
Question 4: What is the primary function of a distribution amplifier (DA) in an AV system?
- To convert digital video to analog
- To split and amplify a single signal to multiple outputs without degradation (Correct answer)
- To switch between multiple input sources
- To upscale video resolution for large displays
Correct answer: To split and amplify a single signal to multiple outputs without degradation
A distribution amplifier takes a single input signal, amplifies it, and distributes it to multiple outputs while maintaining signal integrity across all destinations.
Question 5: Which video interface standard uses BNC connectors and is common in professional broadcast and long-distance installations?
- HDMI
- DisplayPort
- SDI (Serial Digital Interface) (Correct answer)
- VGA
Correct answer: SDI (Serial Digital Interface)
SDI (Serial Digital Interface) uses coaxial cable with BNC connectors and is the professional broadcast standard capable of carrying uncompressed digital video over long distances.
Question 6: What is screen gain in projector screen technology?
- The increase in resolution provided by the screen material
- The ratio of light reflected by the screen compared to a standard reference surface (Correct answer)
- The maximum image size the screen can display
- The amplification factor of the screen's embedded speakers
Correct answer: The ratio of light reflected by the screen compared to a standard reference surface
Screen gain measures how much light a projection screen reflects relative to a Lambertian (perfectly diffuse) surface; a gain above 1.0 concentrates reflected light toward the audience.
Question 7: What is the color temperature of a standard D65 white point commonly used in video production?
- 3200 Kelvin
- 4500 Kelvin
- 5500 Kelvin
- 6500 Kelvin (Correct answer)
Correct answer: 6500 Kelvin
D65 corresponds to 6500 Kelvin and is the standard white point for consumer video, HDTV, and sRGB color space, representing a neutral daylight color.
CTS Display Technologies and Video Systems 2
What does HDCP protect in an AV system?