By PURPLELEC | 21 July 2025 | 0 Comments
HDMI 2.1 vs DisplayPort 1.4: A Comprehensive Comparison and Selection Guide
The comparison between HDMI 2.1 and DisplayPort 1.4 extends far beyond just bandwidth and resolution. For users seeking the ultimate visual experience, each interface has its unique strengths. HDMI 2.1 excels in delivering a viewing experience akin to the human eye, while DisplayPort 1.4 stands unparalleled in its ability to connect multiple monitors in a daisy-chain configuration. Let's delve deeper into the technical characteristics of both to help you make an informed decision.
HDMI 2.1: Feature-Rich, Leading the Audio-Visual Revolution
HDMI 2.1, the latest iteration in the HDMI series, introduces a host of innovative features not found in DisplayPort. A comparison reveals that HDMI 2.1 offers a more comprehensive feature set, including eARC, ALLM, and VRR, providing users with an unprecedented audio-visual experience.
Three Standout Features:
1、HDMI Audio Return Channel (ARC):
Early HDMI versions supported only unidirectional transmission, whereas ARC enables bidirectional audio flow. For instance, connecting an HDMI cable between a TV and a soundbar's HDMI-ARC port ensures audio is routed to the soundbar instead of the TV's built-in speakers. Note that both the TV and external A/V receiver must support this feature.
2、Enhanced Audio Return Channel (eARC):
As an upgraded version of ARC, eARC supports advanced audio formats like Dolby True HD, ensuring users enjoy rich, detailed audio when streaming on Netflix or Amazon Prime. It synchronizes audio and video seamlessly, reducing input lag for an exhilarating experience during fast-paced action movies. Additionally, users can control the soundbar's audio using the TV remote.
3、Auto Low Latency Mode (ALLM):
A boon for gamers, ALLM automatically optimizes the gaming experience without manual TV settings adjustments to game mode, eliminating operational delays. However, both the TV and gaming console must support ALLM.
DisplayPort 1.4: Multi-Stream Transport, Redefining Multi-Monitor Setup
When comparing HDMI 2.1 and DisplayPort 1.4, Multi-Stream Transport (MST) emerges as DisplayPort 1.4's unique advantage.
MST: Revolutionizing Multi-Monitor Connections:
MST transforms how multiple monitors are connected and configured. By daisy-chaining monitors, users can effortlessly expand their desktop without additional cables or ports, resolving cable management issues and saving desk space.
MST offers an immersive screen experience for gamers and multimedia enthusiasts, supporting games or videos spanning multiple screens for a broader field of view. It also supports advanced features like high resolution, high refresh rates, and High Dynamic Range (HDR).
Resolution and Refresh Rate: The Showdown Between HDMI 2.1 and DisplayPort 1.4
For a straightforward answer, HDMI 2.1 edges out DisplayPort 1.4 in supporting a 144Hz refresh rate at 4K resolution. However, considering display and resolution involves more nuances.
The Importance of Bandwidth and Display Stream Compression (DSC):
Bandwidth refers to the total data transmission capacity of an interface, encompassing audio and video. Higher bandwidth translates to better resolution, refresh rates, and frame rates per second. HDMI 2.1 boasts a bandwidth of 48 Gbps, while DisplayPort 1.4 offers 32 Gbps. Yet, DSC technology compresses data to fit within available bandwidth without compromising resolution, pixels, or color.
Performance Breakdown:
HDMI 2.1 supports resolutions up to 10K (10240 x 4320 pixels) at 60Hz and 8K (7680 x 4320 pixels) at 60Hz. Depending on the device's display capabilities, it can also handle 4K (3840 x 2160 pixels) at 120Hz or even 240Hz.
Despite its lower bandwidth, DisplayPort 1.4 leverages DSC to achieve refresh rates exceeding 120Hz at 4K resolution.
Conclusion and Recommendations
HDMI 2.1 enhances the audio experience with ARC and eARC, while ALLM optimizes gaming (device support required). DisplayPort 1.4's MST simplifies multi-monitor setups, offering an immersive gaming experience across screens. HDMI 2.1 supports higher resolutions and refresh rates, but DisplayPort 1.4's performance is comparable thanks to DSC.
When choosing, consider your device's capabilities and requirements. A well-informed decision will elevate your audio-visual experience to new heights.
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