Mapping GOPS in an Improved DVC to H.264 Video Transcoder - Advanced Concepts for Intelligent Vision Systems - page 31

Sequences QCIF (176x144) 15 fps GOP = 2

39.00

Hall

Soccer

37.00

CoastGuard

Foreman

35.00

33.00

31.00

Reference
Proposed

29.00

27.00

0 20 40 60 80 100 120 140 160 180 200

Bit rate [kbit/s]

Sequences QCIF (176x144) 15 fps GOP = 4

39.00

Hall

Soccer

37.00

Foreman

Coastguard

35.00

33.00

31.00

Reference
Proposed

29.00

27.00

0 20 40 60 80 100 120 140 160 180 200

Bit rate [kbit/s]

Sequences QCIF (176x144) 15 fps GOP = 8

39.00

Hall

Soccer

37.00

Foreman

35.00

CoastGuard

33.00

31.00

Reference
Proposed

29.00

27.00

0 20 40 60 80 100 120 140 160 180 200

Bit rate [kbit/s]

Fig. 8. PSNR/bitrate results using QP=28, 32, 36 and 40 for 15fps sequences with GOP = 2,4,8.
Reference symbols: ■Foreman, ♦Hall, ▲CoastGuard and ●Soccer.