The High-Definition Multimedia Interface (HDMI) is a digital audio/video data interface used to transmit high-quality signals from digital multimedia sources to television sets. Cox Cable provides a range of cable boxes, some of which support HDMI. Several factors determine whether HDMI produces better-looking visuals than non-HDMI cable boxes.
Broadcast Quality of the Individual Program
The broadcast quality of the program being watched may be lower than HD quality, in which case HDMI cables will not make too much of a difference. Only certain shows and channels are transmitted in high-definition, and these are the only shows where HDMI will make a noticeable difference in visual quality.
Quality of Television Set
The high-detailed signal that comes with the HDMI interface can only be properly enjoyed on a high-definition television set. Standard definition sets cannot take advantage of HDMI, and the Cox HDMI cable box will not improve visual quality substantially.
Electrical Noise
HDMI is an all-digital interface, which handles interference better than analog signals. Any interference caused by nearby electromagnetic fields will not affect the HDMI signal quality to a noticeable level. The HDMI interface will produce a cleaner image than an analog connection in an electromagnetically noisy environment.
Distance Between Cable Box and Television
The length of the HDMI cable must be at least long enough to reach between the cable box and the television. If this is very long, signal degradation can occur. With the all-digital HDMI interface, signal degradation has a negligible effect on video quality. Analog cables fair far worse when used to join distant components.
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- HDMI: Frequently Asked Questions
- Cox Cable: Connect a Cox High Definition Receiver Using an HDMI Cable
