---
title: "Compare JPEG and MPEG"
subject: "Multimedia System"
chapter: 5
key: "semester_8/multimedia_system:jpeg-vs-mpeg"
source: https://www.bctengineer.com/q/semester_8/multimedia_system/jpeg-vs-mpeg
site: BCT Engineering
---

# Compare JPEG and MPEG

Multimedia System · Chapter 5: Data Compression

- Asked in: 2075 Bhadra, 4 marks
- Video: [JPEG VS MPEG COMPRESSION TECHNIQUE || MULTIMEDIA](https://www.youtube.com/watch?v=RDJuQoDZSWg) — EXAM TIME
- Answer checked by Claude Opus 5.5 (high effort) on 2026-10-14
- Page: https://www.bctengineer.com/q/semester_8/multimedia_system/jpeg-vs-mpeg
- Whole chapter: https://www.bctengineer.com/md/semester_8/multimedia_system/chapter-5

## Question

Compare JPEG and MPEG.

## Short answer

JPEG compresses still images using spatial redundancy (DCT, quantization, Huffman), achieving about 10:1 to 20:1. MPEG compresses video and audio using both spatial and temporal redundancy, with I, P, B frames and motion estimation, achieving 50:1 to 100:1 or more. MPEG's I frames are JPEG-like.

## Answer

JPEG (Joint Photographic Experts Group) compresses still images. MPEG (Moving Picture Experts Group) compresses moving pictures (video) together with audio.

| Point | JPEG | MPEG |
|---|---|---|
| Media | Still images | Video and audio |
| Redundancy used | Spatial only (within one image) | Spatial and temporal (between frames) |
| Core methods | DCT, quantization, zig-zag, Huffman | DCT plus motion estimation and compensation, Huffman |
| Frame types | Each image coded independently | I, P and B frames in a group of pictures |
| Compression ratio | About 10:1 to 20:1 | About 50:1 to 100:1 or more |
| Delay and complexity | Low; encoder and decoder are symmetric | Higher; encoding is more complex than decoding |
| Random access | Not applicable | Possible at I frames |
| Audio | None | Includes audio coding and synchronisation |
| Standard types | Baseline, progressive, lossless JPEG | MPEG-1, MPEG-2, MPEG-4 |
| Uses | Photos, web images, cameras | DVD, digital TV, streaming |

**Relation:** the I frames of MPEG are coded almost exactly like JPEG images. Motion JPEG codes every frame as a JPEG, giving easy editing but a larger file than MPEG.

## Check yourself

The answer's key points as multiple-choice questions, with the correct option and why.

1. What redundancy does MPEG use that JPEG does not?
   A. Spatial redundancy
   B. Temporal redundancy between frames, using motion estimation and compensation
   C. Colour redundancy
   D. No redundancy
   Answer: B. JPEG codes each image independently (spatial only); MPEG also exploits similarity between successive frames. (Key point: Redundancy type)

2. Which frame types does MPEG use in a group of pictures?
   A. Only JPEG frames
   B. A, B and C frames
   C. I, P and B frames
   D. X and Y frames
   Answer: C. I frames are coded much like JPEG and allow random access; P and B frames use prediction. (Key point: Frame types)

3. Which is correct?
   A. JPEG: video and audio, 50:1; MPEG: stills, 10:1
   B. Both handle only stills
   C. JPEG: still images, about 10:1 to 20:1; MPEG: video with audio, about 50:1 to 100:1 or more
   D. Both have the same ratio
   Answer: C. MPEG gets higher ratios by using temporal redundancy and includes audio coding. (Key point: Media and ratio)