HDMI stands for High-Definition Multimedia Interface, which is a digital interface for transmitting uncompressed video data and compressed or uncompressed digital audio data from an HDMI-compliant source device to a compatible computer monitor, video projector, digital television, or digital audio device. HDMI is a digital replacement for analog video standards and was developed to improve on existing connectivity standards by creating a smaller connector, adding support for embedded audio, and delivering a higher resolution video signal.
Key features of HDMI include:
- Cable Composition: An HDMI cable is composed of four shielded twisted pairs, with impedance of the order of 100 Ω (±15%), plus seven separate conductors.
- Ethernet Channel: HDMI Ethernet Channel technology consolidates video, audio, and data streams into a single HDMI cable, and the HEC feature enables IP-based applications over HDMI and provides a bidirectional Ethernet communication at 100 Mbit/s.
- Types of HDMI Cables: There are four types of HDMI cables: Standard HDMI, Standard HDMI with Ethernet, High-Speed HDMI, and Ultra High-Speed HDMI.
HDMI cables can pass video, audio, and data signals, and they are used to connect smart devices to a TV or home theater set-up. HDMI cables are widely used in home entertainment systems, corporate and commercial markets, education, presentation, digital signage, and retail display to transmit high-quality audio-video signals from device to device.
