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Table 2 Performance for 30 fps QCIF sequences and three temporal layers

From: Temporal scalable mobile video communications based on an improved WZ-to-SVC transcoder

QCIF sequences

WZ GOP

One layer (7.5 fps)

Two layers (15 fps)

Three layers (30 fps)

TR (%)

ΔBitrate (%)

ΔPSNR (dB)

ΔBitrate (%)

ΔPSNR (dB)

ΔBitrate (%)

ΔPSNR (dB)

Foreman

2

0.88

−0.05

1.03

−0.06

1.32

−0.05

−77.61

4

0.86

−0.05

1.54

−0.07

1.68

−0.07

−77.78

8

0.54

−0.03

0.90

−0.04

1.01

−0.04

−78.00

Hall

2

−0.01

0.00

0.08

0.00

−0.04

0.00

−78.34

4

−0.01

0.00

−0.01

0.00

−0.02

0.00

−78.37

8

−0.06

0.00

0.01

0.00

0.10

0.00

−78.39

CoastGuard

2

0.14

−0.01

0.16

−0.01

0.25

−0.01

−78.10

4

0.14

−0.01

0.24

−0.01

0.23

−0.01

−78.17

8

−0.03

0.00

0.01

0.00

−0.05

0.00

−78.18

Soccer

2

0.41

−0.02

1.12

−0.05

0.98

−0.03

−75.68

4

0.48

−0.02

1.05

−0.03

1.20

−0.03

−77.19

8

0.28

−0.01

1.23

−0.04

1.41

−0.04

−77.45

Mean

 

0.30

−0.02

0.61

−0.03

0.67

−0.02

−77.77