3.1.8.1.6 Summary of Terms

DwtQ: A tile after DWT transformation and quantization.

DwtQ-LL: The LL3 band of DwtQ.

DwtQ-NonLL: The non-LL3 bands of DwtQ.

DwtQ-LL-Deltas: The difference between two consecutive LL3 elements from DwtQ.

Ref: The reference tile, which reflects the current DWT/quantized bits of the decoder.

Diff, Diff-LL, Diff-NonLL: The difference between Ref and DwtQ of the current tile.

SB: The result of the sub-band diffing decision engine.

BitPos: A function that returns a bit position used for progressive encoding.

PQF: The Progressive Quantization Factor, defined as (1 << BitPos).

ProgQ: Data from SB that has been "extra quantized" using PQF.