HDMI ARC or eARC? Which is the best way to enjoy Dolby Atmos Surround Sound?

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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.

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 theater 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'll discuss some on these issues try to bring more clarity on this.

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Видео HDMI ARC or eARC? Which is the best way to enjoy Dolby Atmos Surround Sound? канала Ooberpad