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Display Technologies and Video Systems Flashcards

7 cards from real CTS practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What HDMI feature allows a TV to send audio back to an A/V receiver through the same cable that delivers video to the TV?

    Answer: HDMI ARC (Audio Return Channel)

    HDMI ARC (Audio Return Channel) allows a display to send audio back upstream to an A/V receiver or soundbar over the same HDMI cable used for the incoming video signal.

  2. In a video signal, what does the term 'interlaced scanning' refer to?

    Answer: Scanning odd lines first, then even lines, to form a complete frame

    Interlaced scanning draws a frame in two passes—first all odd-numbered lines, then all even-numbered lines—resulting in two fields per complete frame, as used in legacy broadcast formats like 1080i.

  3. What does the contrast ratio of a display measure?

    Answer: The ratio of luminance between the brightest white and darkest black the display can produce

    Contrast ratio is the ratio of the luminance of the brightest white to the darkest black a display can produce; a higher contrast ratio indicates better image depth and shadow detail.

  4. Which display technology uses a spinning color wheel and a Digital Micromirror Device (DMD) chip to create images?

    Answer: DLP (Digital Light Processing)

    DLP (Digital Light Processing) technology uses a DMD chip consisting of millions of microscopic mirrors and a color wheel (in single-chip designs) to modulate light and produce the final image.

  5. What is the purpose of a scan converter in an AV system?

    Answer: To convert a computer video signal to a format compatible with a video display or broadcast standard

    A scan converter changes the sync rate, resolution, or format of a computer video output so it is compatible with broadcast or consumer video equipment that uses different standards.

  6. What is the recommended minimum ambient light level for a rear-projection display room to ensure adequate image contrast?

    Answer: Ambient light should be kept below 10 foot-candles at the screen

    For acceptable contrast in rear-projection environments, ambient light at the screen surface should be kept below approximately 10 foot-candles to prevent washing out the projected image.

  7. When calculating the required projector brightness for a room, which factor increases the ANSI lumens needed?

    Answer: Increasing the ambient light level in the room

    Higher ambient light levels wash out the projected image, so a brighter projector (more ANSI lumens) is required to maintain acceptable image contrast and visibility.