Coding Operation
1.Four
Types of Coding Operation
–Used
to code new significance.
–9
contexts according to the significance of its neighbors
–
•(2)Sign
Coding (SC)
–
–Used
to code the sign right after a coefficient is identified significant.
–
–5
contexts based on the sign of four neighbors
–
•(3)Magnitude
Refinement (MR)
–3
contexts depending on the significance of its neighbors and whether it is
the first time for refinement.
–
(4)Run-Length
Coding(RLC)
–Group
4 insignificant coefficients when they are very probable.
–Reduce
the average number of symbols needed to be coded.
–One
context for whether all four are insignificant
Run-Length Coding for Cleanup pass
2.Flow
Chart for All Coding Passes
