Can Dolby Atmos work over HDMI ARC? How good is Dolby Atmos over HDMI eARC? And what is DD+ and Dolby True HD? Let's find out in this video.

Most audiophiles, gamers, and movie buffs want their home cinema set-up to pump out quality audio, but get stumped when they have to consider the choice between HDMI ARC (Audio Return Channel) and eARC (Enhanced Audio Return Channel).

For the uninitiated, eArc is an improved version of ARC. Since it’s the next big thing in revolutionising audio quality, we decided to present a quick breakdown to you in this video, explaining both (while also demystifying a few complex terms).

HDMI ARC and eARC are technologies available on HDMI supported equipment such as Soundbars, Televisions and AV Receivers. Both technologies can be used to enjoy Dolby Atmos height effect surround sound with compatible hardware. But confusion still prevails among consumers regarding Dolby Atmos compatibility and what they do need to have in order to get Dolby Atmos working.

As discussed earlier, The HDMI Audio Return Channel (ARC) provides a way for TVs to send audio "upstream" to an A/V receiver or sound bar.

The benefit of HDMI ARC is that it simplifies the home theatre setup by eliminating the cable clutter and brings seamless user experience with HDMI CEC for enabling control over the soundbar via your TV’s remote. Though there is one limitation of HDMI ARC. That it only carries lossy, lower-bitrate audio formats and thus high-bitrate Dolby Atmos signals and not processed for playback.

This limitation was addressed with HDMI eARC along with support for Lossless audio formats along with other improvements.

Though you’ll still see soundbars available which are Dolby Atmos compatible yet feature only HDMI ARC while many term Atmos as only working only on eARC compatible devices.

It's because Dolby Atmos is an immersive audio format that can be delivered via multiple audio codecs including Dolby Digital Plus and Dolby TrueHD. Hence, Blu-ray Discs deliver Dolby Atmos using Dolby TrueHD (with Dolby Digital Plus as an available alternative), and broadcast and streaming services deliver Dolby Atmos using Dolby Digital Plus and these signals can be decoded via a compatible AV Receiver, Soundbar or Smart-TV.

Non-Dolby Atmos capable devices will decode a 5.1-ch or 7.1-ch version from the Dolby Digital Plus or Dolby TrueHD bitstreams.

In this video, we have tried to bring more clarity on the subject of HDMI ARC and HDMI eARC.

The final verdict is that the HDMI eARC is clearly the evolution of home theatre, and brings significant benefits over previous versions!

For movie lovers, it delivers lossless audio formats like Dolby TrueHD, which supports up to 7.1 audio channels as well as Dolby Atmos immersive audio for your Home Cinema.

Since the availability of HDMI eARC devices is still limited, it may be a while before you can upgrade all your devices to this new standard. However, it is a good idea to look for HDMI eARC support in case you are planning to purchase a new TV or receiver anyway, as this would allow you to enjoy its benefits in the future.

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Music: zeropage - Ambiphonic (The song is permitted for commercial use under license “Attribution 3.0 Unported (CC BY 3.0)“”) #homecinema

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