ITPEC IP April 2025 Question 25
Which of the following is a data format that can be used to compress both video and audio data?
Explanation
MPEG — the standard for compressing video together with its audio.
MPEG (Moving Picture Experts Group) standards compress each frame and also the differences between successive frames, and they include audio coding (MP3 is MPEG-1 Audio Layer III). MPEG-1 was used on Video CDs, MPEG-2 on DVDs and digital broadcasting, and MPEG-4 on smartphones and web video.
Answer (d)
Why not others:
- •(a) BMP — the Windows bitmap format for still images, normally stored uncompressed
- •(b) GIF — a still-image format limited to 256 colours, compressed losslessly; it can hold a simple animation but no sound
- •(c) JPEG — the standard for compressing still images such as photographs; no video, no audio
Key rule: JPEG compresses still images, MPEG compresses video and audio, and GIF and PNG are lossless still-image formats suited to illustrations.
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