HDMI: Uncompressed AV transmission cables
HDMI stands for High-Definition Multimedia Interface and is a compact audio/video standard for transmitting uncompressed digital data. It is in use since 2003.
HDMI connects digital AV sources (e.g. set-top boxes, DVD players, PCs, video game consoles, AVCHD camcorders) to compatible digital TVs, audio devices and video projectors.
It supports uncompressed TV or PC video formats, including high-definition video and up to 8 channels of compressed or uncompressed digital audio as well as an Ethernet data connection and Consumer Electronics Control (CEC) connection, on a single cable.
A standard HDMI cable supports video formats up to 1080i and 720p while a high-speed HDMI cable supports 1080p.
Main differences with HD-SDI:
HDMI cables are mostly used for consumer applications such as home entertainment and are generally only up to a few metres in length, while HD-SDI is predominantly used in professional AV and broadcast environments.
HDMI is mostly intended for connecting a media playing source to a monitor and not that suitable for transmitting signals from a recording device. HD-SDI is the best choice to use with recording cameras because it is a more durable and reliable connection, partly thanks to a locking BNC connector, which HDMI doesn’t have.
Furthermore, HDMI doesn’t transport time code while HD-SDI does.
See a comparison between HD-SDI and MPEG
More about HD-SDI
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