9
Test 12 (H.263):
Zoom in and zoom out of ‘A to Z’ map
Subjective Impairments H.323 384
Kbps 768
Kbps
BLK 5
5
BLR 5
5
CLR 1
1
JRK 5
5
Test 13 (H.263):
Text legibility (% of screen height) at viewing distance approx. 5x
screen diagonal
Legibility H.323 384
Kbps 768
Kbps
20 pt (3.5%)
Yes
Yes
16 pt (3%)
Yes
Yes
14 pt (2.5%)
No
No
12 pt (2.3%)
No
No
Test 14 (H.263):
Video with several vision cuts
Subjective Impairments H.323 384
Kbps 768
Kbps
BLK 4
4
BLR 4
3
CLR 1
1
OP 1
1
SCR 3
3
JRK 5
4
Test 15 (H.263):
Man teaching with flip chart
Subjective Impairments H.323 384
Kbps 768
Kbps
LS 3
3
BLK 4
3
BLR 3
2
CLR 1
1
JRK 2
2
Test 16:
Playback from a domestic VHS videotape player
Is picture stable?
Yes
