![]() It was meant to replace other multimedia formats such as DVI and the old-school component hookups. HDMI stands for High-Definition Multimedia Interface and it was developed by a collection of electronics manufacturers as a way to improve audio and video connectivity standards. These ports can be found on devices such as TVs, game consoles, streaming devices, computers, and monitors. The female end of a standard HDMI which is usually found on the electronic device is typically 14 mm × 4.55 mm (0.55 in x 0.18 in). The male end, which is usually found on the cable itself, is typically 13.9 mm x 4.45 mm (or roughly 0.547 in x 0.175 in for my American friends). The standard is the largest of the three. You can tell them apart, primarily by their size. The term could refer to any number of these three, but more than likely if someone doesn’t specify, they are talking about the standard. The first connector we’re going to talk about is the type A or “standard” HDMI, often simply referred to as just “HDMI.” That’s where this all gets a little tricky. ©By SIMOBORTOLO – Own work, CC BY-SA 4.0 – License 3 HDMI Connector Types: Type A HDMI The cable on the far left is the standard HDMI cable. Here are three HDMI connector types and what each one looks like. HDMI cables are essential for electronic connections nowadays, but sometimes it can be difficult to tell them apart. Other times it could be because you have the wrong cable entirely. Sometimes it’s because the numerous connection points make it difficult to insert the cable. You flip it over, but it doesn’t work that way either. However, we do not need to focus on the video aspect, we obviously will just focus on the audio benefits of HDMI 2.1/eARC.Have you ever been frustrated with an HDMI cable that just didn’t seem to want to plug in? You try it one way, and it doesn’t work. It also allows for higher video qualities 4K and 8K videos will be able to transmit a higher frame rate and overall resolution through HDMI 2.1.This increase in speed and bandwidth allows HDMI to carry higher qualities of audio, which includes the new object-based surround technologies, such as Dolby Atmos and/or DTS:X.It essentially raises the bandwidth and speed of the signal transmission. To put it as simply as possible, t his new eARC function has built on the foundation of what ARC already created and has now made it stronger and more robust. This version has brought the addition of 'eARC'. Now, the most current version of HDMI is HDMI 2.1.Here is another image, for additional clarification, that shows the "Before" and "After" of HDMI-ARC: A single HDMI cable (plugged into ARC compatible TV's/devices) will carry the video to the TV and then return the audio to the system the customer is using. There is no longer any need for a separate audio cable. Then, a single HDMI cable (plugged into an HDMI-ARC port) will carry the video to the TV, and the TV will then return the audio back to the sound bar or A/V receiver via ARC. Now, with ARC, the devices can be plugged into the sound bar's or A/V receiver's HDMI ports. Before ARC, you would need all of these devices plugged into the TV and then have a separate cable (optical, RCA component etc.) supplying audio to the sound bar or A/V receiver. All devices are plugged into separate HDMI ports on the TV. For Example: Picture this - connected to your TV, you have an Xbox, an Apple TV and a Fire TV stick.It can transmit video, while also simultaneously outputting audio to the sound bar (or whatever external sound device the customer may have) via the TV's HDMI-ARC functionality/port. With the addition of HDMI-ARC, the audio/video now works as a two way street. "One way" meaning, think of the audio and video signal as a one way street. ![]() Prior to the invention of ARC, HDMI could only transmit audio/video "one way". HDMI version 1.4 brought the advent of HDMI-ARC ( Audio Return Channel). HDMI (High Definition Multimedia Interface) has gone through many different iterations/versions since its debut in 2004. ![]()
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