Do You Really Know SDI(Serial Digital Interface) in These Aspects?

Maybe most of the people have a knowledge of SDI(Serial Digital Interface), but when it really comes into it, how many people are there indeed familiar with it? Then today, Gigalight will make a comprehensive introduction to you about it in these aspects.

What is SDI?

SDI (Serial Digital Interface) is a digital video interface standard made by SMPTE organization. This serial interface transmits every bit of data word and corresponding data through a single channel. Due to the high data rate of serial digital signal (a kind of digital baseband signal), it must be processed before transmission.

What Are the Main Types of SDI Video Optical Transceiver?

SDI video SFP optical transceiver can be divided into various types according to different factors. For example, according to operating wavelength, they can be classified into 1310nm, 1490nm, 1550nm and CWDM wavelengths video SFP transceivers; according to operating rate, they can usually be divided into 3G-SDI, 6G-SDI and 12G-SDI video SFP transceiver.

What Are the SDI Digital Video Matrix and its Main Functions?

The digital video matrix refers to that the m channel video signal transmitted into the electronic device on the n channel monitoring device via array convention. In addition, it is also available to achieve the video switching via the digital cross-point chip and to achieve the channel shift mainly by the manual mode to plug copper shaft connector of the wiring frame before the digital video matrix appears. At present, the digital matrix is distinguished in the working bandwidth. For example, for the device that can support 3G-SDI high-speed signal, the automatic balancing function can usually be achieved in both the input and output terminal of each channel; the high-end device is with CDR clock regeneration function; the form of interface is with BNC copper shaft interface; it also supports the optic fiber interface of video SFP slot, also adopts the modular design, and flexible in the configuration. After that, it is more convenient for users to use.

What is the Difference Between HDMI and SDI Optical Transceiver?

Different in the Transmission Mode: HDMI is with the parallel transmission mode, the quantity of cables reaches up to 19 pairs; while SDI is with the serial transmission mode, the quantity of cables is one pair.

Distinguished in Applications: HDMI is for application of consumer products, such as consumption-grade camera, game box, high-definition TV, and other digital video output; while SDI is for the broadcast market, is applied in the TV station and studio, and so on. HDMI interface supports HDCP encryption to protect HD digital copyright, while SDI does not support it.

What Does the Speed Rate of SDI Include?

StandardsTypesSpeed Rate
SMPTE 259MSD-SDI270Mbit/s, 360Mbit/s, 143Mbit/s, 177Mbit/s
SMPTE 344MED-SDI540Mbit/s
SMPTE 292MHD-SDI1.485Gbit/s, 1.485/1.001Gbit/s
SMPTE 372MDual-link HD-SDI2.970Gbit/s, 2.970/1.001Gbit/s
SMPTE 424M3G-SDI2.970Gbit/s, 2.970/1.001Gbit/s
SMPTE ST-20816G-SDI6 Gbit/s
SMPTE ST-208212G-SDI12 Gbit/s


Above is a comprehensive introduction to SDI. Hoping this post can help you have a better knowledge of it so that it will be beneficial to the applications of related products.


Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.