Polycom HDX 4500 - Page 21

18
Test 10c (H.264): Turntable speed 3
Subjective Impairments H.323
384 kbit/s
768 kbit/s
2.0 Mbit/s
4.0 Mbit/s
BLK
3
2
1
1
BLR
3
2
2
2
CLR
2
2
2
1
JRK
3
2
1
1
Test 10d (H.264): Turntable speed 4
Subjective Impairments H.323
384 kbit/s
768 kbit/s
2.0 Mbit/s
4.0 Mbit/s
BLK
3
2
1
1
BLR
3
3
3
3
CLR
2
2
2
1
JRK
4
3
2
1
Test 11 (H.264): Football sequence
Subjective Impairments H.323
384 kbit/s
768 kbit/s
2.0 Mbit/s
4.0 Mbit/s
BLK
4
3
2
1
BLR
5
4
2
2
CLR
2
2
2
2
JRK
2
1
1
1
Test 12 (H.264): Zoom in and zoom out of ‗A to Z‘ map
Subjective Impairments H.323
384 kbit/s
768 kbit/s
2.0 Mbit/s
4.0 Mbit/s
BLK
4
2
2
2
BLR
4
3
2
2
CLR
1
1
1
1
JRK
4
3
2
1
Test 13 (H.264): Text legibility (% of screen height) at viewing distance approx. 5x
screen diagonal
Legibility H.323
384 kbit/s
768 kbit/s
2.0 Mbit/s
4.0 Mbit/s
20 pt (3.5%)
Yes
Yes
Yes
Yes
16 pt (3%)
Yes
Yes
Yes
Yes
14 pt (2.5%)
Yes
Yes
Yes
Yes
12 pt (2.3%)
No
Yes
Yes
Yes