Rosewill RXS-3323 Appendix D Bandwidth Estimation, Image Resolution, Average range of data sizes

Internet Camera RXS-3323/RXS-4324 User Manual

Appendix D: 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	Average bit rate for	Average bit rate for H.264 mode
	for JPEG mode	MPEG4 mode
160 x 120	3 ~ 6k byte per frame	64kbps~256kbps	32kbps~192kbps
(QQVGA)		@ 30fps	@ 30fps
320 x 240	8 ~ 20k byte per frame	256kbps~768kbps	192kbps~512kbps
(QVGA)		@ 30fps	@ 30fps
640 x 480 (VGA)	20 ~ 50K byte per frame	512kbps~2048kbps	384kbps~1536kbps
		@ 30fps	@ 30fps
1280x1024	100 ~ 200k byte per frame	NA	512kbps~3076kbps
(SXGA)			@ 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.

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