HDMI CABLE as one of the most common audio and video cables, provides high-quality audio and video transmission, is a variety of devices connected to the “bridge”.
As a senior audio and video players, want to bring you a deep understanding of HDMI cable
Why do you need an HDMI cable?
HDMI cables have become mainstream device connectivity cables precisely because they serve several important purposes:
1 Multi-device compatibility. HDMI cables are required for almost all modern TV, monitor, projector, gaming console and AV device connection scenarios.
2 High-quality audio and video transmission.HDMI cables are capable of supporting multi-channel audio, ARC, eARC, 4K@60Hz, 4K@120Hz and many other features, ensuring no loss of image and sound quality.
3 Simplified wiring. The traditional connection needs to transmit audio and video separately through different wires, while HDMI cable only needs one to connect the devices, simplifying the connection process.
4 Supports digital rights management.HDMI cables support HDCP (High-bandwidth Digital Content Protection) technology, which is different from the digital rights management technology that prevents unauthorized copying of content.HDCP ensures that the content transmitted over HDMI is protected, and is suitable for transmitting copyrighted high-definition and ultra-high-definition content.
What are the types of HDMI cables?
In order to differentiate the specifications of HDMI cables, the HDMI Association has categorized HDMI cables into 5 main types. There are 3 types that we meet most often, HDMI1.4, HDMI2.0 and HDMI2.1. What are the differences between HDMI cables with different HDMI transmission protocols?
Let's start with the HDMI1.4 protocol version. It supports 8 audio channels, and the transmission bandwidth is 10.2Gbps, theoretically, it can also support 4K. but due to bandwidth limitations, it can only support 4k resolution 30 fps video, there is no way to achieve the 4K@60Hz video transmission requirements, because if you need to transmit 4K@60Hz video, the bandwidth should be at least 12Gbps. it is also often misunderstood that the HDMI1.4 cable is is not good enough, in fact, it just does not support the transmission of 4K video with too high a refresh rate, not that it can not be transmitted.
HDMI2.0 protocol version of the cable, all aspects of performance are better than HDMI1.4. The bandwidth reaches 18Gbps, so in terms of picture quality, it can support 4K@60Hz, 3D video, and static HDR. transmission sound quality is also greatly improved, supporting multiple audio streams, 32 audio channels, automatic audio and video synchronization, and 1536kHz audio sampling rate. For most devices in the home, HDMI2.0 cables are basically ready to meet the demand.
HDMI2.1 protocol cables are the highest specification Ultra HDMI cables currently available. It is backward compatible with HDMI1.4 and HDMI2.0 protocols, with a bandwidth of up to 48Gbps. 8K, 7680x4320 resolution, dynamic HDR (HDR Dynamic Data), Variable Refresh Rate (VRR), Quick Media Switching (QMS), and Automatic Low Latency Mode (ALLM) can be supported for picture quality, and the audio quality is upgraded from Audio Return Channel (ARC) to Enhanced Audio Return (ARC) in HDMI1.4. ) is upgraded to Enhanced Audio Return Channel (eARC).
However, it should be noted that since the end of 2021, the HDMI Association in the naming strategy, determined that “HDMI2.0 and HDMI2.1 collectively referred to as HDMI2.1”. This means that under the new naming rules, manufacturers may also label HDMI2.0 performance cables as “HDMI2.1 cables”. This requires you to carefully check the HDMI cable performance when choosing to make sure you have what you need.
Dongguan Fenfei Electronics Co., Ltd.
