There will be no quality difference using HDMI-ARC or the optical output. You may lose an HDMI input if you use ARC. Check your TV audio menu to make sure it can be set to output in PCM stereo. Most optical to analog converters won't handle 5.1 bitstream output.13 dic 2019
Does RCA to HDMI converter improve picture quality?
But what if you want to convert video from your old device to your new HD display? In that case, you're going to need an RCA to HDMI converter. Not only will a good converter convert the signal, it will also upscale it. This means refining the detail – as best as possible – for 720p or 1080p.20 ene 2021
Does HDMI converter improve picture quality?
No the quality sent through AV cables are at best 480, (HD being 1080, even 720 is considered HD) however the device can digitally upscale (if it supports upscaling) it to make it “look” better.