SDI is the professional standard for video transmission and often, higher-end equipment will only include SDI ports on their systems. Let’s dive into the pros and cons of each standard to give you a better idea of what they’re working with. While the differences between these two standards may seem arbitrary at first, there are in fact key distinctions between them that should be considered before making your choice. Once a device receives and decodes both signal versions, it then measures the signal information each version holds and fills any missing data that may have degraded during transmission. In contrast, HDMI was developed in 2002 and is now the most widely-used consumer video cable.Because HDMI cables are often constructed of two cables twisted together, one cable carries the original signal, while the other carries an inverse copy of the signal. These cells are sent one by one down a single coaxial cable and because the signals within them are uncompressed, each signal can be left completely intact throughout the entire transmission process. The transmission process works by encoding uncompressed video signals into packets of data referred to as “cells”. SDIĭeveloped in 1989, SDI is a digital video interface that transmits uncompressed audio and video signals between devices. To help you figure out exactly what type is best for you, let’s first cover the differences between the two and how they operate. Both standards function a little differently and can offer different strengths that may be useful depending on your production needs. The two types of video transmission standard are Serial Digital Interface (SDI) and High Definition Multimedia Interface (HDMI).
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