The HDMI cable is mainly used as an interface between any audio or video source, such as a set-top box, DVD player, or A/V receiver, and an audio or video monitor such as DTV (Digital Television) through a single cable. They also support the standard, enhanced or high-definition video and also multi-channel digital audio through a single cable.
Purpose of a coaxial cable
The coaxial cables are mainly used for transmission of radio frequency signals. The major applications of the coaxial cables are they connect the radio transmitters and receivers to their antennas, computer network connections (say, for example, Ethernet connections), digital audio and distribution of cable TV signals.
HDMI vs Coax cables
- The coaxial cables are fiber optic cables with shield, dielectric and center connector whereas the HDMI cables have four twisted shielded pairs with separate conductors.
- The coaxial cables have low standard definition resolution whereas the HDMI cables have high definition.
- The coaxial cable uses analog signal whereas the HDMI cable uses the digital signal. The digital signal is less prone to interference and noise. They are also said to degrade less than the analog signals.
- The coaxial cable follows the bus topology which makes the signal more prone to noise, congestion and security risks. These are not present in HDMI cables.
- The HDMI cables can provide excellent audio and video quality signals compared to the analog coaxial cables.
- Coaxial cables are more convenient to use than the HDMI cables as they are smaller than the normal HDMI cables.
- The coaxial cables require multiple cable connections, unlike the HDMI cables.
- The coaxial cables are most suitable for long-distance transmission of signals than the HDMI cables. Beyond a certain distance, the HDMI cables would require cable extenders.
- The coaxial cables have noise issues in return paths whereas the HDMI cables are noise-free.
- The HDMI cables have the fastest rate of data transfer compared with the coaxial cables.
- The coaxial cables are comparatively cheap and easy to install than the HDMI cables.
- The HDMI cables have a loss-less transmission than that of the coaxial cables.
Thus the above mentioned Coax vs HDMI briefs about their basic differences.
Optical cable vs. HDMI
Both HDMI and optical cable pass digital audio from one device to another. They are better than analog cables. The biggest difference between the optical and the HDMI cable is that HDMI can pass high-resolution audio that includes Blu-ray, Dolby TrueHD, and DTS HD Master audio.