An Effective Transform Unit Size Decision Method for High Efficiency Video Coding

Table 2

𝑃_𝑟(𝑋_𝑁∣𝑁𝑍_𝑁=𝑘) of determined TU sizes according to NNZ in traffic.

QP	Conditional probability 𝑃𝑟(𝑋𝑁∣𝑁𝑍𝑁=𝑘) (%)
	𝑁=32				𝑁=16				𝑁=8
	𝑘=0	𝑘=1	𝑘=2	𝑘=3	𝑘=0	𝑘=1	𝑘=2	𝑘=3	𝑘=0	𝑘=1	𝑘=2	𝑘=3
22	98.5	62.2	49.1	40.1	90.9	74.5	68.9	63.3	94.4	84.8	75.4	71.9
27	94.0	65.0	58.2	44.8	95.5	85.2	75.0	68.6	98.0	88.8	81.0	77.2
32	96.5	81.0	68.9	54.7	97.6	87.1	78.5	73.5	99.1	90.7	82.0	79.3
37	97.8	80.8	65.9	57.6	98.5	88.9	79.3	74.8	99.6	94.3	85.8	80.3
Average	96.7	72.3	60.5	49.3	95.6	83.9	75.4	70.0	97.8	89.7	81.1	77.2