Po ARC przechodzi kodek DD+ i to jest "prawdziwy" Dolby Atmos. Proszę nie wprowadzać w błąd :). Nie wiem co masz na myśli mówiąc "nie prawdziwy" ale się mylisz
A dla osob znających angielski do poczytania(https://developer.dolby.com/blog/dolby-audio-over-hdmi-part-3-reality/):
Why am I not getting Dolby Atmos to my home theater connected to my television using HDMI ARC?
As we talked about in Part 1, Dolby Atmos is supported in two codecs - Dolby TrueHD and Dolby Digital Plus. Before 2016, televisions only supported Dolby Digital over HDMI ARC and haven’t been upgraded to support Dolby Digital Plus passthrough. However, most recent televisions now support Dolby Digital Plus over HDMI ARC. Also, only the latest versions of some smart TV applications support Dolby Digital Plus, and these newer versions may not be available on older televisions. And lastly, some home theater devices don’t yet correctly advertise Dolby Atmos support over HDMI ARC, which means that a television cannot detect that a Dolby Atmos-capable device is connected.
HDMI ARC does not have enough data capacity to support the transmission of Dolby Atmos content that is encoded using Dolby TrueHD, which is the format used on Blu-ray Disc and UHD Blu-ray Disc. To support Dolby Atmos over HDMI ARC for Blu-ray Disc playback, a television has to decode Dolby TrueHD and transcode it to Dolby Digital Plus before output. Today, this feature is only supported in televisions that have native Dolby Atmos decoding.