PLANET ICA-HM136 - Manual (Page 57)

Appendix D:
Bandwidth and Video Size Estimation
The frame ra te of video tr ansmitted from the Interne t camera d epends on con nection bandwidth
between client and serve r, video re solution, codec type, and qu ality setting o f server. Here is a
guideline to help you roughly estimate the bandwidth requirements for your Internet camera.
The required bandwidth depends on content of video source. The slow motion vi deo will produce
smaller bit rate generally and fast motion will produce higher bit rate vice versa. Actual results
generated by the Internet camera may be varying.
Image
Resolution
Average range of data
sizes for M-JPEG mode
Average bit rate for
MPEG-4 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
256kbps~768kbps
@ 30fps
192kbps~512kbps
@ 30fps
640 x 480
(VGA)
20 ~ 50K byte per frame 512kbps~2048kbps @
30fps
384kbps~1536kbps
@ 30fps
1280x1024
(SXGA)
100 ~ 200k byte per
frame
NA
512kbps~3076kbps
@ 15fps
1600x1200
(UXGA)
600 ~ 1500k byte per
frame
NA
640kbps~6144kbps
@ 15fps
NOTE:
Audio stream ing also take s ban dwidth around 5 kbps to 64 kbps. Most xDSL/Cabl e
modem upload speeds may not even reach up to 128 kbps. Thus, you may not be able
to receive an y video while streamin g audio on a 128 kbp s or lower con nection. Even
though th e upload spee d is m ore than 1 28kbps, for optimal video pe rformance,
disabling audio streaming will get better video performance.
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