AV.link, also known under the trade names nexTViewLink, SmartLink, Q-Link, EasyLink, etc., is a protocol to carry control information between audio-visual devices connected via the SCART (EIA Multiport) connector.
The Consumer Electronics Control (CEC) communication channel in HDMI and PDMI is based on AV.link.
[citation needed] AV.Link uses a single wire in an open collector configuration.
Receivers observe the data line at 1.05±0.2 ms after the falling edge to determine the bit's value.
A message consists of a start bit, followed by a series of data bytes.