AirLive CW-720 - Manual (Page 80)

5. Troubleshooting & FAQ
75 AirLive CW-720 User’s Manual
5.3 Bandwidth Estimation
The frame rate of video transmitted from the device depends on connection bandwidth
between client and server, video resolution, codec type, and quality setting of server. Here
is a guideline to help you roughly estimate the bandwidth requirements form your device.
The required bandwidth depends on content of video source. The slow motion video will
produce smaller bit rate generally and fast motion will produce higher bit rate vice versa.
Actual results generated by the device may be varying.
Image
Resolution
Average
range of data
sizes for
JPEG mode
Average bit rate
for MPEG4 mode
Average bit rate
for H.264 mode
160 x 120
(QQVGA)
3 ~ 6k byte
per frame
64kbps~256kbps
@ 30fps
32kbps~192kbps
@ 30fps
320 x 240
(QVGA)
8 ~ 20k byte
per frame
NA 192kbps~512kbps
@ 30fps
640 x 480
(VGA)
20 ~ 50K
byte per frame
NA 384kbps~1536kbps
@ 30fps
1280x720
(HD)
100 ~ 200k
byte per frame
NA 512kbps~3076kbps
@ 15fps
1600x1200
(UXGA)
NA 512kbps~3076kbps
@ 15fps
Note: Audio streaming also takes bandwidth around 32kbps. Some xDSL/Cable
modem upload speeds could not even reach up to 128 kbps. Thus, you may not be
able to receive good quality video while also streaming audio on a 128 kbps or lower
connection. Even though the upload speed is more than 128kbps, for optimal video
performance, disabling audio streaming will get better video performance.