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Table 3 Performance for 30 fps CIF sequences and three temporal layers

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

CIF 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

1.31

−0.08

1.48

−0.07

1.75

−0.06

−79.30

4

1.32

−0.08

1.90

−0.07

2.09

−0.07

−79.99

8

0.82

−0.04

1.42

−0.05

1.78

−0.05

−80.17

Hall

2

0.10

0.00

0.08

0.00

0.08

0.00

−81.26

4

0.12

0.00

0.09

0.00

0.13

0.00

−81.44

8

0.05

0.00

0.17

−0.01

0.15

−0.01

−81.45

CoastGuard

2

1.47

−0.07

1.44

−0.06

1.43

−0.05

−80.98

4

1.42

−0.07

1.56

−0.06

1.46

−0.05

−81.03

8

1.63

−0.07

1.51

−0.05

1.58

−0.05

−81.06

Soccer

2

1.54

−0.06

2.46

−0.10

2.86

−0.10

−75.90

4

1.50

−0.06

2.15

−0.08

3.39

−0.09

−78.13

8

0.98

−0.04

2.44

−0.09

3.91

−0.11

−78.53

Mean

 

1.02

−0.05

1.39

−0.05

1.72

−0.05

−79.94