Friday,
April 19, 2014
11:07 AM
Zigbee HDMI uses 2.4 GHz, as well as the transmitter and receiver we purchased from eBay as an example
Zigbee-250kbps
Bluetooth-2.1 Mbps
Dr. Taskin showed us how to use Google and Wikipedia for technical research on bandwidth and data rates of HDMI as well as the potential transmitters and receivers we are considering using. We couldn't find data rates for HDMI so Dr. Taskin suggested suggested the data rates for a similar technology—DVI. To help ingrain exactly how to do this kind of technical research Dr. Tasking demonstrated comparing the rates that Bluetooth and HDMI transfer data.
DVI—4.9 Gbps
HDMI 1080p—1.485 Gbps
HDMI 720p—742.5Mbps
HMDI 480p—270 Mbps
We need to use a type A HDMI connector which is the standard HDMI cable in the industry
HDMI Bandwidth-4.95 Gbps for 1.0 and 10.2 Gbps for 1.3
http://en.wikipedia.org/wiki/HDMI#Specifications
The problem that arose while doing research was that the technology we were planning on using, which is Zigbee, only used 250 kBps, when HDMI required 1.485 Gbs, the equivalent of 1,567,621.1 kbps. In addition, the Bluetooth wireless technology only covers 2.1 Mbps, whereas the bandwidth for HDMI is 1,530 Mbps. Even if we wanted to use a lower resolution, such as 720p or 480p, there isn't enough bandwidth "space" in either Zigbee or Bluetooth, so we have to find a more capable wireless technology that can support HDMI bandwidth.
Professor Taskin suggested investigating some of the pre-existing wireless HDMI technologies out there and finding out what those companies used for handling the large bandwidth required by HDMI, and after doing some research, the most promising alternative was actually Wi-Fi (IEEE 802.11ac), which can transfer a maximum of 6.93 Gbit/s per band.
This greatly differs from the other suggested wireless options, which are Wireless USB (53-48 Mbps), Wi-Fi IEEE 802.11b (450 Mbps), and Bluetooth 4.0 (24 Mbps).
ZIGBEE
https://docs.zigbee.org/zigbee-docs/dcn/09/docs-09-5131-00-0mwg-zigbee-rf4ce-standard-the-remote-control-standard-for-consumer-electronics.pdf
http://www.zigbee.org/Specifications/ZigBeeRF4CE/Overview.aspx
http://www.commercialintegrator.com/article/when_to_use_zigbee_z-wave
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