What is the difference between SDI optical transceiver and VGA optical transceiver?

Time : Jul. 04, 2022    View : 73

What is the difference between SDI optical transceiver and VGA optical transceiver?



Optical transceivers are mid-end devices for optical signal transmission. The reduction in the price of optical fiber makes it well used in various fields, so the manufacturers of various optical transceivers are like mushrooming up. However, most of the manufacturers here are not fully mature in technology, and the development of new technologies requires capital, manpower, and material resources. As a result, most manufacturers are small and medium-sized enterprises, and various brands have appeared one after another. However, many people are in trouble because they do not understand the usage of SDI optical transceivers and VGA optical transceivers. Then let’s introduce the difference between SDI optical transceiver and VGA optical transceiver in detail.


SDI Optical Transceiver Product Introduction

SDI optical transceiver is evolved on the basis of ordinary digital video optical transceiver, using H.264 encoding method, generally using SDI interface.


SD/HD/3G-SDI optical transceiver products were first developed and used by customers in the radio and television industry. They were used in TV studios and live broadcasts of the Universiade. Later, they were extended to the field of 1080P high-definition monitoring, with reverse control data; the rate was 1.485G (also known as 1.5 G, corresponding to SMPTE-292M standard, supporting 720P) and 2.97G (also called 3G, corresponding to SMPTE-424M standard, supporting FULL HD 1080P),  SDI optical transceiver adopts HD SDI dedicated VIDIO SFP optical module (self-developed by Biyang Optoelectronics), ensure that there is no splash screen, black screen and other phenomena during high-definition image transmission.



The high-definition SDI optical transceiver adopts advanced uncompressed digital high-definition video and high-speed digital optical fiber transmission technology. After converting the 1.485Gbps HD-SDI digital signal into an optical signal, it can be transmitted on the optical fiber for 1-20 kilometers and then restored to an electrical signal. Suitable for SDI video surveillance and long-distance video capture. This series of optical transceivers have stable performance, clear picture quality, high stability, and LED status indication, which can intuitively observe the working status of the optical transceiver.


SDI optical transceiver monitoring solution:

SDI monitoring system equipment: (hd-sdi camera, hd-sdi optical transceiver, hd-sdi to hdmi converter, hd-sdi hard disk recorder)

All front-ends use HD-SDI high-definition digital cameras for collection, use coaxial cable and HD-SDI optical transceiver room center, all the way into HD-SDI matrix, output to the management center for large-screen display, full HD uncompressed audio and video signals, no compression , no delay, no distortion; one image output from the matrix is remotely transmitted to the upper-level center by HD-SDI optical transceiver, which can control the output of any image viewing from the matrix; one enters the encoder to store the audio and video, and then access network, it is convenient to use the Internet to remotely view audio and video images.


This solution is suitable for all large-scale monitoring networks, and can meet the needs of local and special units to watch live images in full HD, real-time, and without delay, that is, access to the Internet can facilitate remote users to view.


VGA optical transceiver product introduction

The VGA optical transceiver transmits the output content of the user’s computer graphics card to a long-distance and real-time digital channel for specific monitoring and display occasions that mainly use computers (such as conference centers, demonstration halls, checkpoints, cashier stations, military exercise monitoring stations, etc.). Remote terminal equipment (computer monitors, TV walls, projectors, etc.) display output requirements, so as to realize the high-resolution, delay-free, long-distance optical fiber communication conversion application of computer VGA interface signals, which can achieve one machine (computer) operation , multi-terminal (display terminal) display effect; VGA optical transceiver can also expand to support ultra-long-distance (several kilometers) mouse and keyboard real-time monitoring and control functions, both ultra-long-distance “one machine to see more” and “one machine to control multiple” solutions Program.



VGA optical transceiver transmits high-definition computer video up to 80 kilometers through standard single-core single-mode fiber, which greatly saves fiber resources. The transmitter’s pass-through loop is used for local computer monitoring. The receiver has one output port. Transmitter and receiver LED indicators show the status of power, video and optical signals. The DVI optical transceiver system provides long-distance transmission for high-resolution computer video signals, and is a highly flexible professional system. The system is specially used in professional A/V, security system, campus environment, industrial monitoring and large venues (stadium) to meet the needs of remote access to computer or computer video signals. The device supports one DVI input, one optical output and one VGA local monitor output. Used in conjunction with the (multi-mode)/(single-mode) optical transceiver receiver, the supported resolutions are 800×600 (all refresh rates), 1024×768 (above 70HZ), other resolutions and refresh rates are related to the screen, and support most displays , but there will be a few screens that cannot be displayed. Support VGA, PS2 port, audio, MIC interface.


VGA optical transceiver application scheme:

  1. With the rapid development of medical equipment technology and the continuous improvement of the knowledge level of medical personnel, the field of medical imaging has expanded many cutting-edge scientific research projects, in order to explore the mystery of the advanced functions of the human brain and conduct scientific analysis of human psychology, fMRI Imaging research technology is developing vigorously, and many life science magnetic resonance brain function research centers have been established internationally.

A new imaging technique rapidly developed by functional magnetic resonance imaging (fMRI), Blood oxygenation level-dependent (BOLD) measurement, is used to analyze high-level functions of the human brain. We use visual, auditory, motor, tactile, or cognitive stimuli to activate different regions of the brain and detect these activations with high-resolution, non-invasive fMRI.

  1. Audio and video structure and schematic diagram of audio-visual stimulation system for brain function

Due to the particularity of medical equipment and nuclear magnetic resonance environment, very strict requirements are put forward for the processing and transmission of various video images and audio: transmission of high-quality audio and video signals; stability of product use; products can run in high magnetic field environments , a high degree of integration between products and field devices. Feichang Technology has established a special team to carry out a lot of research and inspections on medical use. Feichang Technology’s professional solutions and products have been recognized by many customers in the industry.

1). Visual system: the text or pictures are sent to the MRI scanner, so that the examinee can receive visual stimulation or get instructions for functional testing from the picture. Use MRI-specific correction vision glasses to help patients with visual impairments to complete stimulation tasks.

2). Dual-channel non-magnetic audio system: The sound is transmitted to the magnetic resonance scanner, so that the examinee can receive auditory stimulation or obtain the instructions for functional testing from the sound.

3). The subject’s response feedback system: the correct rate and reaction time of the subject’s response are monitored by the button feedback.

  1. Audio and video solution design of audio-visual stimulation system for brain function

Program description:

1). Video transmission: The test images of the computer and DVD are connected to the audio and video switching controller, and a VGA signal is outputted and transmitted to the digital optical processing system through a pair of VGA optical transceivers.

2). Audio and return signal transmission: The audio of the test music and microphone is transmitted to the MRI room through a pair of special multi-function optical transceivers, so that the examinee can receive auditory stimulation or be instructed by sound to perform functional testing; the examinee The return signal of the press key is sent back to the control room through a dedicated multi-function optical transceiver to monitor the correct rate and response time of the examinee; both parties can easily communicate with the scanning room and the control room through microphone speakers and headphones.

3). The special video monitoring system for the nuclear magnetic resonance room: in order to facilitate the observation of the state of the examinee in the nuclear magnetic resonance room, the whole process of the examinee’s examination process is recorded and stored, so as to ensure the safety of the examinee and facilitate the resolution of medical disputes. The video monitoring system of the nuclear magnetic room uses a special ultra-small optical transceiver, which is integrated in the camera and transmits the light signal to the control room for viewing and storage; the impact of complete high magnetic energy on video monitoring.

The above is the introduction of the two types of optical transceivers, SDI optical transceiver and VGA optical transceiver, and their application solutions. I hope it will help those who need it.

Fctel Technology has been engaged in the research and development, production and sales of optical transceivers, industrial switches, protocol converters and other industrial communication equipment for nearly 20 years. Welcome to come to understand and exchange.