HDMI Org, the group that oversees HDMI specifications, has deemed Mini DisplayPort to HDMI cables outside of its standard and will not allow them to be sold.
The group explained to TechRadar that “the HDMI specification defines an HDMI cable as having only HDMI connectors on either end. Anything else is not a licensed use of the specification and therefore, not allowed.”
All licensed HDMI products must undergo compliance testing. Given the fact that the cable is undefined by the group, “it cannot be tested against the Specification,” thereby making it unofficial andunlicensed.
This outcome is devastating for the numerous companies that make money from these cables, though there is one upside. Cables, or dongles, that have a DisplayPort on one end and an HDMI female receptacle on the other are licensed.
HDMI Org does, however, note that there are users who covet this type of cable system, stating that recognizes that there "may be a market need for a cable solution rather than a dongle solution. However, at this time, there is no way to produce these cable products in a licensed manner." According to the report, hundreds of thousands of cables could be affected by a recall.
Apple reportedly developed a Mini DisplayPort to HDMI adapter but never released it, relying instead upon third-party offerings .
First introduced in October 2008, the Mini DisplayPort connector is used by Apple in its latest Mac offerings. The standard was designed by Apple as a smaller form factor alternative to the DisplayPort standard. The Video Electronics Standard Association officially adopted the specification in 2009.
More recently, Apple and Intel have collaborated on Thunderbolt, a new high-speed I/O technology that makes use of the Mini DisplayPort connector. The first generation of Thunderbolt offers two channels of 10Gbps transfers in both directions, simultaneously, and 10 watts of power. Intel expects to scale the technology up to transfer rates of 100Gbps within a few years. Late last month, Apple released the first Thunderbolt cable and added the first third-party Thunderbolt storage solutions to its online store. The cable was revealed to be an active cable with a transceiver chip at each end and “tons of little resistors.”