HDMI Licensing, LLC, the HDMI specification authority, announced the technical features of HDMI 1.4. The specific HDMI 1.4 enhancements are described below:

1. HDMI Ethernet Channel (HEC)

The HDMI 1.4 version of the data line will add a data channel to support high-speed two-way communication. Interconnected devices that support this feature can send and receive data over 100M Ethernet for any IP-based application. The HDMI Ethernet channel will allow Internet-based HDMI devices to share Internet access with other HDMI devices without the need for an additional Ethernet cable. The new feature will also provide a connectivity platform that allows content to be shared between HDMI devices.

2. Audio Return Channel (ARC) This channel reduces the number of cables required for audio to be transmitted and processed and played back. In the case of HDTVs receiving audio and video content directly, this new channel allows HDTVs to stream audio directly to the A/V amplifier receiver via an HDMI cable without the need for another cable.

3, 3D Over HDMI new specification will define a common 3D format and resolution for HDMI devices, standardization of the input and output parts of the home 3D system, up to two video streams of 1080p resolution.

4, support 4K × 2K resolution HDMI device support HD resolution will reach 4K × 2K, four times the current 1080p, can transfer content with the same resolution with many digital home theater. Specific format: 3840 × 2160 24Hz / 25Hz / 30Hz; 4096 × 2160 24Hz.

5, expand support color space HDMI technology will support color space designed for digital cameras, including sYCC601, Adobe RGB, AdobeYCC601, can display more accurate vivid colors when connected to a digital camera.

6, Micro HDMI mini interface The new Micro HDMI interface will be about 50% smaller than the current 19-pin common interface, which can bring up to 1080p resolution support for portable devices.

7. Automotive Connection System (ACS) A cable specification designed for high-definition content transmission in vehicles. It avoids the effects of common internal environment such as heat, vibration, and noise, and also transmits HD to the car manufacturer. The content provides a practical solution. With the HDMI 1.4 specification, there will be new data lines. For example, in order to utilize the HDMI Ethernet channel, consumers must purchase standard or high-speed HDMI cables that support Ethernet. Connecting external devices and car HDMI HD systems also requires new car HDMI. line.

HDMI data line type at a glance:

1. Standard HDMI cable: The data transmission rate is up to 1080i/60Hz;

2, high-speed HDMI cable: beyond 1080p, including the dark color and all 3D formats in the HDMI 1.4 specification;

3, standard Ethernet HDMI cable: support Ethernet connection;

4, high-speed Ethernet HDMI cable: support Ethernet connection;

5, car HDMI cable: used to connect external HDMI devices and car HDMI devices.

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April 13, 2023