Part 2 Outline

• Terms and Concepts
• Entropy Coding
• Image & Video Compression Basics
• Transform-based Coding / Compression
• Discrete Cosine Transform (DCT)
• JPEG Standard

Compression Ratio

$$ \frac{B_0}{B_1} $$

B0-number of bits before compression B₁-number of bits after compression

Information Entropy

$$

H(S) = - \sum_{i=1}^{n} p(s_i) \log_2 p(s_i)

$$