[Asterisk-video] Video bandwidth consumption

[Salvatore Frandina]

Hi,

I would like to know what is video bandwidth consumption of CIF picture with
1 fps and format YUV 4:2:0 coded with H263p and H264?

I know that the total video bandwidth without compress is about 1.25 Mbits
(CIF*bit*fps*luminance + QCIF*bit*fps*(chrominance R + chrominance B) =
355*288*8*1+176*144*8*1*2.

I know that H264 codec can reduce the video bandwidth up to 50-60 kbps and
70-80 kbps Ethernet bandwidth. H263p is worse than twice of H264 so requires
140-160 kbps Ethernet bandwidth.

I have analyzed with Wireshark 1.2.6 RTP->stream analysis the RTP flow. I
have taken in account the sixth column IP BW with Matlab and I have extract
the PDF function. The mean and max bandwidth values are very high respect
how I'm expecting. For H263p 343 kbps and 555 kbps...

Thank in advance

PS
The audio bandwidth is correct. G711a requires 64 Kbps Bit rate and 87.2
Kbps Ethernet bandwidth (27% overhead) as reported here
http://www.voip-info.org/wiki/view/Bandwidth+consumption.



-- 
_______________________________________
Salvatore Frandina
website: http://frandinas.altervista.org
mail: salvatore.frandina at gmail.com

_______________________________________
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-video/attachments/20100313/f43adf98/attachment.htm