An Adaptive Source-Channel Coding with Feedback for Progressive Transmission of Medical Images

Table 1

Definition of symbols.

Symbols	Description
𝑝	For 𝛾(𝑥,𝑦)≥𝑡𝑛, called significant coefficients at threshold 𝑡𝑛.
𝑛	For 𝛾(𝑥,𝑦)<0&|𝛾(𝑥,𝑦)|≥𝑡𝑛, called negative significant.
𝑧	For 𝛾(𝑥,𝑦)<𝑡𝑛, but some of its descendants have a value greater than 𝑡𝑛, called isolated zero.
𝑡	For 𝛾(𝑥,𝑦)<𝑡𝑛, and all its descendants have magnitudes less than 𝑡𝑛, called zerotree zero.
1,0	Refinement bits for reconstructing image.