table of contents
Background and Summary
IP Video Task Force Report
Appendices
Useful Information and Resources
IP Video Task Force Report
APPENDIX C: Comparison of Desktop Codecs by Vendor Model
|
ViGo |
Escort/Cruiser
|
ViaVideo
|
PICTURETEL
|
H.320 – ISDN |
|
X |
|
X |
H.323 – IP |
X |
X |
X |
X |
H.224 - Real time control protocol
for simplex application using the H.332 LSD/HSD/MLP channels |
X |
X |
|
|
H.281 - Far end camera control
|
X |
X |
|
X |
H.243 - Procedures for establishing
communication between three or more audiovisual terminals using
digital channels up to 1920 kbps |
|
X |
|
X |
H.261 - Video codec for audiovisual
services at p x 64 kpbs |
X |
X |
X |
X |
H.263 - Video coding for low bit
rate communication |
X |
X |
X |
X |
H.263+ |
|
|
X |
|
SQCIF (128 x 96 pixels) |
|
|
|
|
QCIF (176 x 144 pixels) |
X |
X |
|
X |
CIF (352 x 288 pixels) aka FCIF
|
X |
X |
X |
X |
4CIF (704 x 576 pixels) |
|
|
|
|
16CIF (1408 x 1152 pixels) |
|
|
|
|
G.711 - Pulse code modulation (PCM)
of voice frequencies |
X |
X |
X |
X |
G.722 - 7 kHz audio-coding within
64 kbps |
X |
X |
X |
X |
G.722.1 - Low complexity coder;
it compresses 50Hz - 7kHz audio signals into one of two bit rates,
24 kbit/s or 32 kbit/s |
|
|
|
X |
G.723.1 - Dual rate speech coder
for multimedia communications transmitting at 5.3 and 6.3 kbps
|
X |
X |
|
X |
G.728 - Coding of speech at 16
kbps using low-delay code excited linear prediction |
X |
X |
X |
X |
Acoustic Echo Cancellation (AEC)
|
X |
X |
|
X |
Appendix C Continued
|
|
ViGo |
Escort/Cruiser |
ViaVideo |
PICTURETEL |
Automatic Gain Control (AGC) |
X |
X |
|
X |
Automatic Noise Suppression (ANS)
|
X |
|
|
X |
T.120 - Data protocols for multimedia
conferencing |
X |
X |
|
X |
QoS |
X |
X |
X |
|
Frames per Second: fps |
30 |
30 |
30 at 384 |
30 |
Windows 95 |
|
|
|
|
Windows 98 |
X |
X |
X |
X |
Windows NT |
|
X |
|
X |
Windows 2000 |
X |
X |
X |
X |
Windows ME |
X |
X |
|
X |
Processor |
P II |
P |
P with MMX |
P II |
Processor Speed (MHz) |
300 |
200 |
350 |
400 |
Memory (RAM in MB) |
64 |
64 |
64 |
128 |
Video Memory (RAM in MB) |
2M VRAM |
|
|
|
Disk Space (MB) |
|
50 |
20 |
50 |
Multicast |
|
X |
|
|
Max Lan Speed |
1.5 Mbps |
1.5 Mbps |
|
384 - ISDN 768 - IP |
USB or Card (ISA/PCI) |
USB |
PCI |
USB |
PCI* |
Camera (Manual/ PTZ )
|
Both |
Both |
Manual*** |
Manual |
Horizontal Resolution |
330 HTVL |
460 TVL |
|
310 HTVL |
Tilt Range |
|
+90/-30** |
|
|
Pan Range |
|
+/-100** |
|
|
Horizontal field of view |
|
3-47.5** |
|
|
View Angle |
50 x 39** |
|
|
46** |
Lens Mount |
|
|
|
|
Iris Control |
Flickerless |
|
|
Flickerless |
White Balance |
Fixed |
AUTO |
|
Auto |
Built-in Mic |
|
|
|
|
Active Pixels |
512H x 492 V |
|
|
|
Min Illumination |
< 15 Lux |
|
|
|
Man Contrast Adjust |
|
|
|
X |
Privacy Shutter |
|
|
|
X |
Manual Focus |
X |
|
X |
50 mm to inf. |
Appendix C Continued |
|
ViGo |
Escort/Cruiser |
ViaVideo |
PICTURETEL |
Picturetel FlipCam |
|
|
|
Manual |
Horizontal Resolution |
|
|
|
330 HTVL |
View Angle |
|
|
|
68** |
Lens Mount |
|
|
|
|
Iris Control |
|
|
|
X |
White Balance |
|
|
|
|
Built-in Mic |
|
|
|
|
Active Pixels |
|
|
|
|
Min Illumination |
|
|
|
|
Man Contrast Adjust |
|
|
|
|
Privacy Shutter |
|
|
|
X |
Manual Focus |
|
|
|
10" to inf. |
Manual Zoom |
|
|
|
2.3 x |
* One free PCI slot
** Unit in degrees
*** Polycom does not have detailed information
|