HDMI 1.4 introduces new features into equipment such as ethernet channel and audio return, initally due to a change in HDMI cable wiring the cables were referred to as version 1.4 cables (and many still are). Previous HDMI versions (1.0, 1.1, 1.2, 1.3 etc) were all of the same basic construction but tested differently. The term HDMI 1.4 cable is no longer used despite some of the bigger name manufacturers still suppling us cables with it printed on them! These cables are now referred to as high speed or high speed with ethernet, the with ethernet variant has a different construction yet still retains backwards compatibility. High speed with ethernet cables incorporate a fifth shielded twisted pair that is used for ethernet channel and audio return, sometimes referred to as HEAC, HDMI Ethernet and Audio return Channel. The new shielded twisted pair uses the previously unused pin 14 and the Hot Plug Pin 19 with the shield or drain connected to the CEC ground on Pin 17 of the HDMI connector.
Στην HDMI 1.4 Ethernet και Audio return Channel στα αχρησιμοποίητα pins 14 και 19 επιστροφή του ήχου από την τηλεόραση στον ενισχυτή.