Al Griffin

A What’s the problem with HDMI Audio Return Channel (ARC)? I’ve heard that most people simply give up on ARC and use an optical digital audio connection from their TV to their receiver instead because they can rarely get it to work between devices, especially ones from different manufacturers. What can the HDMI Forum do to improve the situation? —Phis Tomaskovic / via e-mail

A I want to upgrade my AV receiver but plan to wait until high-end brands like Anthem and Cambridge Audio provide support for HDMI passthrough of the HDR10, Dolby Vision, and Hybrid Log-Gamma (HLG) high dynamic range formats. Am I making the right decision? / via e-mail—Estuardo / via e-mail

Q How can I tell if a TV has a 10-bit panel to process the full 10-bit color of high dynamic range (HDR) video?  I’ve heard that certain TVs accept 10-bit signals, but display them at 8-bit resolution. I’m interested in buying Samsung’s 2016 KS9810 SUHD TV, a top-of-the-line model from 2016, but want to make sure it has 10-bit display. How will I be able to tell the difference?—Jerry Peterson