Video Coding Optimization and Application System - Advanced Video Coding Systems - page 164

Fig. 9.2 Hierarchical P coding structure

Table 9.2 Performance
comparisons between the
proposed scheme of
hierarchical P coding
structure and RD4.0 anchor
for low delay P

Sequences Y(%) U(%) V(%)

− − −

Pku_girls 5.00 8.00 8.30

Pku_parkwalk − 7.10 − 11.30 − 13.90

Traffic − 5.30 − 6.80 − 6.80

− − −

Sunflower 4.70 8.30 8.90

Pedestrian_area − 5.10 − 6.90 − 5.30

Kimono1 − 2.00 − 3.50 − 3.80

Cactus − 7.60 − 9.30 − 11.00

BasketballDrive 0.00 − 2.60 − 1.90

BasketballDrill − 9.60 − 9.50 − 9.70

BQMall − 2.20 − 5.00 − 4.50

PartyScene − 7.90 − 11.40 − 12.40

RaceHorsesC − 0.80 − 1.80 − 1.90

BasketBallPass − 2.50 − 3.60 − 3.50

BQSquare − 7.30 − 21.00 − 19.60

BlowingBubbles − 7.30 − 10.10 − 10.90

RaceHorses − 1.50 − 2.20 − 2.70

City − 2.20 6.50 − 5.20

Crew − 0.20 1.40 − 2.00

Vidyo1 − 4.20 7.20 − 5.90

Vidyo3 − 3.30 4.70 − 6.90

− −

Average 4.30 7.00 7.30

9.1.3 Adaptive Larangian Multiplier Selection

In AVS2, the Rate-GoP concept is introduced in the hieratical GoP structure, as
shown in Figs. 9.3 and 9.4 . The frame with lower layer level is reconstructed with
better quality, which will be referred more frequently. This frame plays a crucial role