Wireless video transmission module
A pair of small boards that takes HDMI video, encodes it, sends it over wireless or Ethernet and turns it back into HDMI at the far end. The pair plugs into the customer's own carrier boards inside a finished product.
Read →VHT40
VHT40 means 802.11ac (VHT, Very High Throughput) running on a 40 MHz channel. Wireless video modules use it to state which link-rate class they operate in.
Read →5 GHz wireless video link
A 5 GHz wireless video link carries compressed video in the 5 GHz Wi-Fi band, which has more spectrum and less interference than 2.4 GHz. Range depends on the Wi-Fi module fitted and on obstructions at the site.
Read →HDMI loop-out
HDMI loop-out means the transmitter passes its HDMI input straight out to a local monitor while sending the same picture over the link. The term only applies to the transmitter side.
Read →KVM reverse channel (USB HID)
A KVM reverse channel sends data from USB HID devices such as keyboards and mice at the receiver back along the video link to the host at the transmitter. The host sees local USB devices, so it can be operated from a distance.
Read →Edge-connector module package
An edge-connector package turns the module into a small PCB with gold-plated contacts that plugs into a card socket on the carrier board. Nothing is soldered, so swapping, repair and stock handling stay simple.
Read →VBUS supply range
VBUS is the module's only power input. It accepts 3.7 to 5.1 V, typically 5.0 V. Anything above 5.1 V damages the module, so the carrier must bring its supply down into this range first.
Read →H.265 video coding
H.265 (HEVC) is a video compression standard that needs less bitrate than H.264 for the same quality. Wireless video links use it to squeeze a 4K picture down to a rate the radio channel can carry.
Read →EDID
EDID is a block of data stored in a display that tells the source which resolutions, refresh rates and audio formats it supports. A wireless video link has to bring the far display's EDID back so the source knows what to send.
Read →HDCP
HDCP is the copy-protection protocol on HDMI. When protected content plays, the source checks every device in the chain for HDCP support and withholds the picture, or lowers the resolution, if any device fails.
Read →1T1R and 2T2R antennas
1T1R means one transmit and one receive chain on a single antenna; 2T2R means two of each on two antennas using MIMO. On a wireless video link the antenna count depends on the Wi-Fi module fitted.
Read →Ethernet PHY and wired extension
An Ethernet PHY is the physical-layer chip that turns digital data into signals on the cable. With a PHY built into the video module, the same module can run over wireless, Ethernet cable, switches or fiber media converters.
Read →Carrier board design
The carrier board is the PCB the video module plugs into. It holds the power circuit, HDMI connector, antenna connectors, network port, button and LED, and it sets the product's shape and connectors. The module handles the video link; the carrier handles everything else.
Read →Button pairing and link encryption
Button pairing is how a transmitter and receiver recognize each other and create their own key. Link encryption means video, audio and keyboard/mouse data are then sent encrypted with that key, so unpaired devices cannot join.
Read →4K60 and 4K30
4K60 and 4K30 are both 3840 × 2160; the difference is frames per second, 60 versus 30. Sixty frames give smoother motion, while thirty are enough for static content and need less bitrate and power.
Read →UVC
UVC is the standard class for USB video devices. A UVC camera works on a computer with no driver install. Converting UVC to HDMI lets a USB camera feed a display or capture device directly.
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