Table 1 Performance for 15 fps QCIF sequences and two 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) | TR (%) | ||
|---|---|---|---|---|---|---|
ΔBitrate (%) | ΔPSNR (dB) | ΔBitrate (%) | ΔPSNR (dB) | |||
Foreman | 2 | −0.25 | −0.01 | 0.39 | −0.01 | −71.41 |
4 | −0.06 | 0.00 | 0.71 | −0.03 | −73.08 | |
8 | −0.23 | −0.01 | 0.43 | −0.02 | −73.46 | |
Hall | 2 | −0.07 | 0.00 | 0.19 | −0.01 | −74.67 |
4 | 0.06 | 0.00 | −0.13 | 0.00 | −74.70 | |
8 | −0.01 | 0.00 | −0.02 | 0.00 | −74.74 | |
CoastGuard | 2 | 0.01 | −0.01 | −0.07 | 0.00 | −74.33 |
4 | 0.09 | 0.00 | −0.02 | 0.00 | −74.52 | |
8 | −0.22 | −0.01 | 0.28 | −0.01 | −74.58 | |
Soccer | 2 | −0.56 | −0.03 | 1.05 | −0.04 | −68.76 |
4 | −0.47 | −0.02 | 1.56 | −0.06 | −71.67 | |
8 | −0.82 | −0.03 | 2.04 | −0.07 | −72.21 | |
Mean | −0.21 | −0.01 | 0.53 | −0.02 | −73.18 | |