ITPEC FE Morning April 2023 Question 24
Topic: Multimedia
What is the approximate minimum required bandwidth for delivering a 30-frames/second video in 800 x 600 pixel and 24-bit full color? Here, the data is not compressed during communication.
Explanation
350 Mbps — uncompressed video needs the bits of one frame times the frames per second.
- •Bits per frame: 800 × 600 × 24 = 11,520,000 bits
- •Bits per second: 11,520,000 × 30 = 345,600,000 bits, about 346 Mbps
- •The nearest option is approximately 350 Mbps
Answer (d)
Why not others:
- •(c) 35 Mbps — 10 times too small; at 11.52 Mbit per frame it would carry only about 3 frames per second, not 30.
- •(b) 3.5 Mbps — 100 times too small; it would take more than 3 seconds to send a single frame.
- •(a) 350 kbps — 1,000 times too small, a slip between the kilo and mega prefixes.
Key rule: Raw video bit rate = width × height × bits per pixel × frames per second; divide by 8 only when the answer is wanted in bytes.
Multimedia · AI-written, may contain errors
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