Difference Between HDMI 2.0 and HDMI 2.1

HDMI 2.0 and HDMI 2.1 are different versions of the HDMI (High-Definition Multimedia Interface) standard, and they differ mainly in terms of bandwidth, resolution support, refresh rates, and additional features.

1. Bandwidth

   • HDMI 2.0: Supports up to 18 Gbps.

   • HDMI 2.1: Supports up to 48 Gbps, allowing for much higher video and audio quality.

2. Resolution & Refresh Rate

   • HDMI 2.0: Supports up to 4K at 60Hz.

   • HDMI 2.1: Supports up to 8K at 60Hz or 4K at 120Hz, ideal for high-end gaming and ultra-HD displays.

3. Dynamic HDR

   • HDMI 2.1 supports Dynamic HDR, which adjusts brightness, contrast, and color scene-by-scene or even frame-by-frame. HDMI 2.0 only supports Static HDR.

4. Variable Refresh Rate (VRR)

   • Only HDMI 2.1 supports VRR, which reduces screen tearing and stuttering in games.

5. Enhanced Audio Return Channel (eARC)

   • HDMI 2.1 includes eARC, offering improved audio quality and compatibility with advanced audio formats like Dolby Atmos and DTS:X. HDMI 2.0 only supports ARC.

6. Quick Frame Transport (QFT)

   • HDMI 2.1 supports QFT to reduce latency, especially beneficial for gaming and real-time applications.

Conclusion:
HDMI 2.1 is a significant upgrade over HDMI 2.0, offering better performance, higher resolutions and refresh rates, and advanced features tailored for modern gaming, home theaters, and future-proofing AV setups.