What is SDI?

Serial Digital Interface (SDI) is a family of digital video interfaces first standardized by SMPTE (Society of Motion Picture and Television Engineers) in 1989. It is a standard for transmitting uncompressed digital video and audio using coaxial or fiber-optic cables.

The SDI interface can not directly transmit the compressed digital signal. Therefore, the system must decompress the compressed signal recorded by digital video recorders, hard disks, and other equipment and then enter the SDI system to travel.

However, repeated decompression and compression will cause image quality degradation and increased latency. Therefore, various formats of digital video recorders and non-linear editing systems have provisions of their own for the direct transmission of the compressed digital signal interface.

Usually SDI signal can be transmitted via BNC connector.

History of SDI

2.?Characteristics and advantages of SDI signals

High-quality transmission: SDI signals can transmit uncompressed digital video signals, retain the original quality of the video and ensure?the clarity and fidelity of the video signal.

High bandwidth and high rate: SDI signals?can ?support high-bandwidth and high-rate data transmission, which can meet the needs of high-definition and ultra-high-definition video transmission.

Low latency:?Due to the direct transmission method, the transmission latency of SDI signals is extremely low, which is very suitable for real-time monitoring and instant response applications.

Strong anti-interference: Compared with analog signals, SDI digital signals have stronger anti-interference capabilities and can maintain stable signal quality over a long distance.

Strong compatibility: The SDI interface standard is unified and compatible with various professional equipment, so that equipment of different brands and models can be seamlessly connected.

Common application

Broadcasting?field:?SDI signals are widely used in the production, transmission and broadcasting of TV programs. It can ensure the high-definition picture quality and real-time performance of TV programs and improve the viewing experience of the audience.

Film production:?In the field of film production, SDI signals have become standard equipment for cameras, video recorders and other equipment. Through the SDI interface, various devices can be easily connected to achieve high-quality video capture?and transmission.

Video surveillance:?In the field of security monitoring, SDI cameras are widely used in,?such as banks, airports, and shopping malls which?require high-definition monitoring due to their lossless video transmission characteristics. SDI signals can provide clear video images to help monitoring personnel accurately judge the monitoring situation.

Post-production: In the process of film and television post-production, SDI signals are used to connect non-linear editing systems, color grading systems and other equipment. Through the SDI interface, high-quality video material transmission and processing can be achieved, improving the efficiency and quality of post-production.

Professional video production:?For scenes?which require high-quality video output, such as ?promotional videos?for company ?and advertising shooting, SDI signals are also an indispensable part. It ensures high quality and stability in every aspect of video production.

Medical image capture field:?More and more hospital upgrade the medical image device due to the stable fixing of SDI connection ?,like laparoscopic surgery and endoscopy. Which can keep the signal recording without interrupting during operation.

?3.Application of MMCX interface for SDI signal

Based on consideration of portable carrying and ?beautiful appearance, the application of MMCX interface to transmit SDI signal came into being. Wikipedia explains that "MMCX interface is a coaxial RF connector that complies with the European Electronic Components Committee 22000 transmission specification. The MMCX interface was developed in the 1990s and adopts an insert-and-clamp connection method that can rotate 360 degrees. Its characteristic impedance is usually 50 ohms."

ezcap279 Portable HDMI/SDI Video Capture Recorder

For example, the following 5-inch large-screen Portable ?SDI/HDMI Standalone ?video recording box developed ?by the ezcap R&D team in 2 years uses the MMCX interface. Do not worry if you are not familar ?with computer operating, as it is no need computer for recording(it likes a capture card, we also call it HDMI SDI Capture card or HDMI SDI Video Recorder) .Just need ?press the record button to start video recording. Except SDI recording ,it can also support HDMI Video recording (capture video from HDMI video source too) .

Welcome you to visit our booth at Global Sources Show 2024

Date: Oct11th-14th, 2024

Add: Asia-World Expo, Hong Kong

Booth: 10R10

If you have interest for this 5 inch Portable HDMI SDI Video Recorder, contact with us

Lily

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