zigbee video

[shobhan03]

hi,
so i was under the impression that i could use a zigbee module for wireless transmission of video feed from the camera. but as it turns out, since the zigbee module is a low data rate module, its not advisable for video transmission.

so what is the bottom line ? it cannot be used in anyways for video transmission ? suppose i am not much interested the high quality feed of it, what if i wanted just a rough idea of what is happening in the other part of the room?

what is the best possible outcome of video transmission over zigbee?

 

[ronsimpson]

You need to keep the data down so: Send high rez really slow, 1 picture every 2 seconds. or Send 100x100 video real time. or Send compresed jtag pictures.

 

[shobhan03]

100x100 would be a very small dimensions ! how do i delay the incoming video from a camera ? , as you said,1 pic every 2 sec.

 

[ronsimpson]

Video is a big problem. You need big memory! Not simple.

I know if a man who uses a PIC and a video camera for motion detecting. He captures about 16 pilels/frame. B&W It takes 16 frams to get his 16x16 picture.

I am playing with a home made 22x22 b&w camera. Mainly for motion detection and avoiding objects. Use where the "computer" has limited memory.

There are JPEG camera that have RS232 output. I think that will work. Camera connects to Zigbee. The data will come at the baud rate. You will get a picture whenever the data is sent.

 

[shobhan03]

ok thats sounds good, will check out for such camera.

 

[Ian Rogers]

I have said camera... JPEG out... 160x160 colour snapshots.... When sending via cable, a reasonable moving picture can be obtained.. Via Xbee (nearly same) there was a bit of latency as the Xbee ( zigbee ) module sends the data in 160 byte chunks.. I was informed at the time to use two Xbee modules side by side and transmit... well pipelined so to speak. I never took it much further..... You can change the data packets internally but didn't resolve anything...

Hope this helps.

 

[ronsimpson]

Thanks Ian,
Where did you get the camera? model number?

 

[Ian Rogers]

Its a 4D labs camera.. I bought it from cool components There is a TTL derivative Here ... Mine has an RS232 level shifter onboard