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

Table 3

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

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	81.5	62.5	53.5	40.4	84.3	80.7	71.2	67.5	92.1	90.1	83.6	81.0
27	84.5	63.3	49.8	38.6	88.5	81.5	71.0	65.2	95.1	92.0	83.8	80.3
32	85.8	77.1	53.9	40.6	91.5	86.6	75.8	70.1	97.2	94.1	86.4	81.6
37	88.7	73.7	54.0	41.3	94.1	88.9	78.7	72.9	98.6	94.8	87.4	81.2
Average	85.1	69.2	52.8	40.2	89.6	84.4	74.2	68.9	95.8	92.8	85.3	81.0