Image Coding

Distortion Measures and Fidelity Criteria

• The binary symmetric channel is characterized by a single parameter: the bit error probability p.

• The channel capacity is then C = 1 +p log p + q log q,

  where q = 1 - p
  

• Least squares single-letter fidelity criterion

• where x and y the transmitted and received n-bit vectors (block or words)

• Hamming distance:

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