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应该是支持的，请看这篇应用手册对ARC和eARC的介绍：www.ti.com/.../sbaa300a.pdf
One of the most important functions the ARC enables is sending audio signal both “upstream” and “downstream” over a single connection. As a result, with eARC the full-resolution sound signals can be passed back and forth between your TV and audio systems with ease and without compromising sound quality.
