L ' High Definition Multimedia Interface (HDMI) is the industry standard for digital communication of audio and video. Due to the high bandwidth achievable, this technical solution allows you to transfer both video and high-definition audio, the same cable. The HDMI is widely used to interconnect DVD players and set-top boxes with digital screens in high definition. Many smart phones and personal computers are now equipped with such an interface.
HDMI was introduced for the first time in 2002 and since then has been constantly enriched and improved until you get to version 1.4 released in June this year. It must be said, however, that at this moment you still can not find products to market HDMI 1.4. In fact, the official site of LLC, which is the company that has the responsibility of the standard, it is stated explicitly that the specific Complaiance Test 1.4, needs to certify the new HDMI interface, has not yet been released.
The first version of HDMI it possible to transfer video data at a rate of 3.96 Gb / s and audio information to 36.86 Mb / s, with a resolution of 1920 × 1200p60, and the ability to transmit 24-bit 8-channel audio at 192 kHz. Version 1.4 will allow you to transfer the video signal to 8.16Gb/se to obtain a resolution of 4096 × 2160p24.
addition to higher resolution, which will support the next generation of displays, HDMI 1.4 introduces new color models used to date for the digital photography and computer graphics.
The most important changes concern the introduction of a channel ethernet, 3D video and audio channel of delivery. Let us now briefly what they are:
Channel Ethernet
This feature allows you to transfer data at 100Mb / s along with the audio / video. Thanks to this important news you can share a single internet connection between all HDMI devices (DVD players, set-top box, HD TV, etc.).. Moreover, in this way all the HDMI terminals can implement IP-based applications.
3D Video
The latest version of HDMI will transfer the information necessary to reproduce three-dimensional video. In This will allow you to use our home games and home theater 3D.
Channel Audio Return
This feature addresses a major limitation of previous versions. In fact, until today, where you must transfer the audio signal in both directions (as for TV with integrated antenna), you have to force it to use an additional cable. With version 1.4 you will instead have the maximum flexibility, and in all cases it is possible two-way communication.
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