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What Is the Difference Between 3G-SDI and HD-SDI?

It is known that SDI interfaces can be roughly divided into three types: SD-SDI (270Mbp, SMPTE259M), HD-SDI (1.485Gbps, SMPTE292M) and 3G-SDI (2.97Gbps, SMPTE424M). It is seen from these standards of division that the rate is an important index. For HD-SDI and 3G-SDI, as the commonly-used two types in radio and television industry, maybe there are still many people unfamiliar with them and what difference between them. Then in this article, there will be an introduction to the difference between HD-SDI and 3G-SDI.

 

Before the introduction to HD-SDI and 3G-SDI, to understand them better, it will be better to know what SDI is. 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 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 Is 3G-SDI?

3G-SDI has been widely used in the radio and TV industry. With the continuous development of the security industry, its advantages, high speed and without digital uncompressed, are gradually found. At present, a large number of 3G-SDI series products have been introduced in the market, including SDI conversion equipment, SDI digital switching matrix equipment and SDI distributor. These devices use 3G signals, and can also be compatible with 1.5G signals for long-distance transmission to meet the diverse needs of users.



What Is HD-SDI?

HD-SDI is a high-definition digital component serial interface. HD-SDI is high-definition radio and television camera which is real-time and uncompressed. It is another scientific and technological progress in the security monitoring field. It provides a high-definition image source for the monitoring center. The HD-SDI camera, based on the serial link standard of the SMPTE (film and television Engineer Association), is a high-definition and real-time video camera that transmits uncompressed digital video through 75 ohm coaxial cables.



What Is the Difference Between 3G-SDI and HD-SDI

The design and production of HD-SDI optical terminal equipment is suitable for serial digital optical transmission equipment with high reliability and high performance in the TV industry. The signal format is from 19.4Mbps to 1.485Gbps, and the system supports the signals with digital TV formats such as SMPTE292, SMPTE259M, SMPTE297M, SMPTE305M, SMPTE310M and DVB-ASI (EN50083-9), so as to satisfy the requirements of industrial products. 3G-SDI digital video optical terminal device with ultra high definition is an upgraded version of the HD-SDI optical terminal device. The signal format is from 19.4Mbps to 2.97Gbps, and the system is accorded with the signal of digital TV formats such as SMPTE424M, SMPTE292M, SMPTE259M, SMPTE297M, SMPTE305M, SMPTE310M, DVB-ASI (EN50083-9) and so on.

 

With the emergence of standard about high-definition(HD) video standards such as 1080i and 720P, the interface is adjusted to process higher data rate(1.485Gbps). The 1.485Gbps serial interface is usually called as HD-SDI interface, defined by SMPTE292M, and uses the same 75 ohm coaxial cable. SMPTE approves a new standard called as SMPTE424M, which doubles the SDI data rate to 2.97Gbps on the same 75 ohm coaxial cable. This new standard is also called 3-Gbps (3G) SDI, which supports higher-resolution image quality such as 1080P and digital cinema. At present, the highest rate of digital products is 7K-SDI.

Above all is about the difference between HD-SDI and 3G-SDI. For SDI series products, Gigalight currently has 3G-SDI SFP, 6G-SDI SFP+, 12G-SDI SFP+ optical transceiver. If you want to know more details, welcome to visit Gigalight official website.

 

About Gigalight(www.gigalight.com):

Gigalight is a design innovator in global optical interconnect field. A series of optical interconnect products include: optical transceivers, passive optical components, active optical cables, GIGAC MTP/MPO cabling, cloud programmers & checkers, etc. Three applications are mainly covered: Data Center & Cloud Computing, MAN & Broadcast Video, and Mobile Network & 5G Optical Transmission. Gigalight takes advantage of its exclusive design to provide clients with one-stop optical network devices and cost-effective products.
publié le mercredi 30 mai à 08:27, aucun commentaire.

Four Mainstream Applications of 100G and Their Features

At present, the application and technology of 100G have always been the focus of the industry, and the market of 100G can not be developed in the real sense due to some factors such as the cost in tech, efficiency, and market demands. However, with the gradual stabilization of 40G, the market of 100G has been slowly opened. Now there are many kinds of interface technology about 100G applications in the market. And then in this article, there will be an introduction to four mainstream applications of 100G and their features.

1. QSFP28 100G SR4 Optical Transceiver and Its Features

The wavelength of QSFP28 SR4 is 850nm, and the interface type is 12-fibers MPO (Intermediate 4-fibers channel is not activated). It is with 4 channels combined with 8-fibers multimode fiber, each channel supporting 25G to achieve 100G rate.

Features: the interface, same as that of QSFP-40G-SR4, can be directly upgraded from 40G  to 100G. The optical module is usually connected with OM3 and OM4 multimode fiber, respectively to support the transmission distance of 70 meters and 100 meters (the recently-published technology is possible to support  transmission distance of 200 meters via OM4 optic fiber).

2. QSFP28 100G PSM4 Optical Transceiver and Its Features

QSFP28 PSM4 transmission mode is similar to that of QSFP28 100G SR4. Each channel supports 25G in 4 channels. This optical module uses single-mode optic fiber as the transmission media and the wavelength is 1310nm.

Features: adopting the QSFP28 port, able to reach transmission distance of 500ms via the single mode optic fiber, which makes it have a certain advantage in the market.

3. QSFP28 100G CWDM4 Optical Transceiver and Its Features

The coarse wavelength division multiplexing technology and LC duplex interface are used with single-mode fiber, by which the maximum transmission distance can reach 2km. Its form factor is QSFP28. This optical module is cheaper than the traditional single-mode optical module.


Features: the coarse wavelength division multiplexing technology based on single-mode fiber has been relatively mature, but QSFP28 CWDM4 has not been formally approved by the IEEE standard group. Currently, the technology standard is unified and promoted by CWDM4 MSA.

4. QSFP28 100G SWDM4 Optical Transceiver and Its Features

SWDM(Short Wavelength Division Multiplexing)refers to the short wavelength division multiplexing technology that can transmit 4 bands of optical signals in multi-mode optical fiber with one fiber. The windows of these 4 bands are respectively 850nm, 880nm, 910nm and 940nm. The principle of this technology is similar to that of CWDM on single mode. But it is the first time that SWDM has applied WDM(Wavelength Division Multiplexing)technology to the short band of multimode optic fiber.


Features: 100GBase-SWDM4 optical module uses a multi-mode duplex LC interface. It just needs optic fiber with 2-fibers. It usually adopts OM4 optic fiber, the transmission distance can reach above 100m. If it uses WBMMF(WideBand Multi-Mode Fiber), the transmission distance can reach 300m. Compared with SR4, SWDM4 requires only 25% of optic fibers.
 

In the current situation, the application mode of 100G is with at least 10 types. And the above-mentioned four types of interface technologies focus on that of data center applications. For more information about it, welcome to visit Gigalight official website(www.gigaligt.com).


About Gigalight:
Gigalight is a design innovator in global optical interconnect field. A series of optical interconnect products include: optical transceivers, passive optical components, active optical cables, GIGAC MTP/MPO cabling, cloud programmers & checkers, etc. Three applications are mainly covered: Data Center & Cloud Computing, MAN & Broadcast Video, and Mobile Network & 5G Optical Transmission. Gigalight takes advantage of its exclusive design to provide clients with one-stop optical network devices and cost-effective products.

 

 
publié le lundi 28 mai à 09:29, aucun commentaire.

An Overview of SDI Video SFP Optical Module

Video optical transceivers are primitively used in radio and television industry. It mainly includes two series: video SFP module or video SFP+ transceiver. Then today’s topic will be involved in types and applications of SDI video SFP optical transceiver in this post.

 

The Definition of SDI Video SFP

SDI SFP optical module and its related products are initially designed for the radio and television industry, applied for television studio, animal filming, film shooting, large sports events live. It is extended to the 1080 PHD monitoring field. SDI SFP optical module is usually used on the SDI interface of the HD-SDI terminal device. The transmission rate and frequency for each different SDI interface are different.

 

Types of SDI SFP Optical Transceiver

SDI Video SFP transceivers can be divided into various types according to different factors. For example, on the basis of operating wavelength, they can be divided into 1310nm, 1490nm, 1550nm and CWDM wavelengths video SFP transceivers; based on transmission distance, there are 300m, 2km, 10km, 20km, 40km; based on operating rate, there are usually 3G-SDI, 6G-SDI and 12G-SDI SFP optical module.

 

3G-SDI video SFP optical transceivers have a data rate up to 3Gbps, which are specifically designed for high performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates. They are generally used for television broadcasting. However, as technology advances, they are now also widely applied in global security applications such as high-end surveillance or unmanned systems, allowing simple designs or upgrades with full HD cameras.

 

6G-SDI video SFP optical transceivers’ data rate is intended to be twice as fast as 3G-SDI optical modules, which means it is supposed to deliver a payload of 6Gbps. Therefore, they are not only designed for SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates but also for SMPTE 2081. 6G-SDI SFP optical module optical transceivers are often used in camera, video, security monitoring applications and 4K /HDTV/SDTV service interfaces.

 

Speed up to 12Gbps, 12G-SDI video SFP transceivers are specifically designed for high performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M, SMPTE 424M, ST2081 and ST-2082 serial rates. They are mainly used for SMPTE ST-297-2006, ST-2081 and ST-2082 compatible electrical-to-optical interfaces and UHDTV/HDTV/SDTV service interfaces.

 

Applications of SDI SFP Optical Transceiver

1. Applied in HD Camera or Monitor System

There are usually multiple HD end-devices in HD camera or monitor system. Therefore, one HD video matrix can be used as one end which provides multiple video SFP ports, and multiple HD-SDI equipments can be used as the other ends. 3G-SDI SFP transceiver is plugged into the equipment respectively, then SDI SFP transceivers on both ends are connected via fiber optic cables.

2. Applied for Broadcast Video Transmission

Broadcast video transmission needs high-density cabling. Thus, HD-SDI equipment with high-density video SFP ports is needed.

 

In Conclusion

Above all is about the introduction to types and applications of video SFP module, hoping this article can be helpful to those who want to know more about video SFP transceiver. In addition, for above-mentioned two series of video optical transceivers, Gigalight currently has these types: 3G-SDI SFP, 6G-SDI SFP+, 12G-SDI video SFP+. For more details, pls visit Gigalight official website.

 

About Gigalight:

Gigalight is a design innovator in global optical interconnect field. A series of optical interconnect products include: optical transceivers, passive optical components, active optical cables, GIGAC MTP/MPO cabling, cloud programmers & checkers, etc. Three applications are mainly covered: Data Center & Cloud Computing, MAN & Broadcast Video, and Mobile Network & 5G Optical Transmission. Gigalight takes advantage of its exclusive design to provide clients with one-stop optical network devices and cost-effective products.
publié le mardi 22 mai à 09:19, aucun commentaire.

Do You Know These about Cloud Computing Data Center?

With the increasing of enterprise informatization application system, the space, electricity distribution system and air conditioning refrigeration of data centers tend to be saturated. Simultaneously, the utilization rate of the servers is generally low. In order to solve the contradiction between the development of data center and the rapid growth of information resources, the concept of cloud computing and the virtualization technology provide the means to optimize the traditional data center. Therefore, cloud computing data center appears. Then in this article, there will be an overview of cloud computing data center.

Before coming into today's topic, it will be better to have a knowledge of some information about cloud computing and traditional data center, by which you will find what relations exit between cloud computing and data center. Simultaneously, it also will be helpful for you to know cloud computing data center better in the following introduction to it.


What Is Cloud Computing?

Cloud computing is divided into public cloud, private cloud and hybrid cloud. Cloud computing refers to the delivery and utilization modes of information technology infrastructures in a narrow meaning; while it means that the delivery and use patterns of services in a broad meaning. Cloud computing has 3 service modes: IaaS, PaaS, and SaaS.

 

What Is the Traditional Data Center?

The traditional data center is the generic term of all IT devices and information systems in the network center. It provides information services for the enterprises or the public through the network. The information system contributes to the standardization of business process and the improvement of operation efficiency for the enterprises. The data center provides a stable and reliable infrastructure and running conditions for the information system, also ensures the convenient maintenance and management of the information system.

 

An Overview of Cloud Computing Data Center

1. What Is the Cloud Computing Data Center?

80% of cloud computing data centers in enterprises are generally deployed with private cloud. Cloud computing data center refers to the data center optimized by the means of application virtualization.

2. The Structure of Cloud Computing Data Center

The structure of cloud computing is divided into two parts: service and management. In the aspect of service, it mainly focuses on providing various services based on cloud, which includes 3 levels: Infrastructure as a Service(IaaS), Platform as a Service(PaaS), and Software as a Service(SaaS).

3. The Constructions of Cloud Computing Data Center

The core technology of cloud computing data center is the virtualization technology. The main objects of virtualization are servers, storage, network and desktop. Thus, a brand new mode to deploy and manage data center is formed. In fact, 3-clouds resources and services need to be constructed.

The Construction of IaaS
The infrastructure layer, based on the IT resources, includes the collection of hardware resources and related management functions after virtualization. The delivery of infrastructure services to users is the most fundamental infrastructure resources, providing users with virtualized computing resources, storage resources and network resources.

 

The Construction of PaaS
Platform layer, based on platform service and middleware, provides middleware and basic services related to application development, deployment and operation, which can better meet the requirements of cloud applications in scalability, availability, and security.

 

The Construction of SaaS
Application layer is a collection of application software on the cloud, which are built on the environments provided by the resource and platform layer from infrastructure layer and delivered to the users through the network.


4. The Advantages and Influences of Cloud Computing Data Center

Improving the Utilization Rate of Resources
Compared with the traditional data center, the cloud computing platform provides flexible services that can dynamically allocate and release resources in a large pool of resources according to the demands of users, without the need to reserve peak resources for each user, so that the utilization rate of resources can be greatly improved. In addition, there are more users in the cloud data center, then the cost to improve energy efficiency is relatively lower. After that, the cost can be apportioned to more servers.

 

Flexible to Extend Resources and to Improve the Reliability
The "cloud" resources applied by users can be adjusted and dynamically expanded according to the requirements of their applications, able to effectively meet the needs of large-scale growth of applications and users.

 

The Data Centers of Small Enterprises Are Gradually Weaken
After entering into the era of cloud computing, IT has transformed from the self-sufficient workshop mode at early period to the industrialized operation mode with a scale effect. Some small-scale data centers personally owned by enterprises will be eliminated, and the data centers with large scale and reasonable configuration resources will take place of them.

 

More Specific in Specialized Responsibility Division
Cloud computing data center is larger-scale, and more specialized than data centers with small/medium scale, higher management level. In addition, it can also provide lower cost needed by unit calculation. Therefore, the costs taken in labour can be cut down to a large extent, and the specialized responsibility division is more specific.

 

Conclusion

The way to upgrade traditional data centers is found by the analyses on cloud computing and virtualization tech. This makes it possible to implement application, develop the new-generation data center to save resources and reduce power dissipation.



Article Source: Gigalight official website (www.gigalight.com).

About Gigalight:
Gigalight is a design innovator in global optical interconnect field. A series of optical interconnect products include: optical transceivers, passive optical components, active optical cables, GIGAC MTP/MPO cabling, cloud programmers & checkers, etc. Three applications are mainly covered: Data Center & Cloud Computing, MAN & Broadcast Video, and Mobile Network & 5G Optical Transmission. Gigalight takes advantage of its exclusive design to provide clients with one-stop optical network devices and cost-effective products.
publié le lundi 21 mai à 08:38, aucun commentaire.

Types of SDI Video SFP Optical Transceiver

SDI optical transceivers are known to many people, initially applied in the radio and television industry. SDI series optical modules include many types, such as SDI SFP optics(mainly includes 3G-SDI Video SFP, 6G-SDI Video SFP, 12G-SDI Video SFP), SDI SFP+ optical module(mainly includes 3G-SDI Video SFP+, 6G-SDI Video SFP+, 12G-SDI Video SFP+), etc. Then today we will talk about types of SDI video SFP optical transceivers.

 

What Is SDI Video SFP Optical Transceiver?

SDI SFP optical module and its related products are initially designed for the radio and television industry, applied for television studio, animal filming, film shooting, large sports events live. It is extended to the 1080 PHD monitoring field. SDI SFP optical module is usually used on the SDI interface of the HD-SDI terminal device. The transmission rate and frequency for each different SDI interface are different.

 

What Are Types of SDI Video SFP Optical Transceiver?

SDI Video SFP transceivers can be divided into various types according to different factors. For example, on the basis of operating wavelength, they can be divided into 1310nm, 1490nm, 1550nm and CWDM wavelengths video SFP transceivers; based on transmission distance, there are 300m, 2km, 10km, 20km, 40km; based on operating rate, there are usually 3G-SDI, 6G-SDI and 12G-SDI video SFP optical transceivers.

 

3G-SDI video SFP optical transceivers have a data rate up to 3Gbps, which are specifically designed for high performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates. They are generally used for television broadcasting. However, as technology advances, they are now also widely applied in global security applications such as high-end surveillance or unmanned systems, allowing simple designs or upgrades with full HD cameras.



6G-SDI video SFP optical transceivers’ data rate is intended to be twice as fast as 3G-SDI optical modules, which means it is supposed to deliver a payload of 6Gbps. Therefore, they are not only designed for SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M and SMPTE 424M serial rates but also for SMPTE 2081. 6G-SDI video SFP optical transceivers are often used in camera, video, security monitoring applications and 4K /HDTV/SDTV service interfaces.

 

Speed up to 12Gbps, 12G-SDI video SFP transceivers are specifically designed for high performance in the presence of SDI pathological patterns for SMPTE 259M, SMPTE 344M, SMPTE 292M, SMPTE 424M, ST2081 and ST-2082 serial rates. They are mainly used for SMPTE ST-297-2006, ST-2081 and ST-2082 compatible electrical-to-optical interfaces and UHDTV/HDTV/SDTV service interfaces.

 

Above all is about the introduction to types of SDI video SFP optical transceiver. For above mentioned SDI video optical transceiver, Gigalight is currently with 3G-SDI SFP, 6G-SDI SFP+, 12G-SDI SFP+ optical transceiver. If you want to know more details of products, pls visit Gigalight official website.

 

About Gigalight:
Gigalight is a design innovator in global optical interconnect field. A series of optical interconnect products include: optical transceivers, passive optical components, active optical cables, GIGAC MTP/MPO cabling, cloud programmers & checkers, etc. Three applications are mainly covered: Data Center & Cloud Computing, MAN & Broadcast Video, and Mobile Network & 5G Optical Transmission. Gigalight takes advantage of its exclusive design to provide clients with one-stop optical network devices and cost-effective products.

 
publié le jeudi 17 mai à 09:40, aucun commentaire.

A Comparison of QSFP28 4WDM and QSFP28 CWDM4

Both 4WDM and CWDM4 belong to 100G QSFP28 series optical transceiver, and are certainly related to WDM (wavelength division multiplexing)tech. Maybe there are still people confused of what differences between QSFP28 4WDM and QSFP28 CWDM4 optical transceiver are. Then in this article, a comparison between them will be made by Gigalight (www.gigalight.com).



An Introduction to 100G QSFP28 4WDM Optical Transceiver

4WDM(4-Wavelength Wavelength Division Multiplexing) optical module is defined by 4WDM MSA, targeted for longer reaches, lower costs, and lower power consumption, smaller form factor(QSFP28 form factor is usually preferred). 100G QSFP28 4WDM optics have three specifications including 100G QSFP28 4WDM-10, 100G QSFP28 4WDM-20, 100G QSFP28 4WDM-40. QSFP28 4WDM-10 is one type of 100G (4x25G) optical transceivers for the 10 km based on the CWDM4 wavelength grid; QSFP28 4WDM-20 and QSFP28 4WDM-40 are types of 100G (4x25G) optical transceivers respectively for 20kms and 40kms based on the LAN-WDM wavelength grid over duplex single-mode fiber (SMF). With respect to the benefits of 4WDM, its main advantages are lower in cost and power dissipation, and longer in transmission distance.

 

An Introduction to 100G QSFP28 CWDM4 Optical Transceiver

The QSFP28 100G CWDM4 optical transceiver is a full duplex, photonic-integrated optical transceiver module that provides a high-speed link with a maximum transmission distance of 2km for 100G Ethernet. 100G QSFP CWDM4 is designed for optical communication applications compliant with the QSFP MSA, CWDM4 MSA and portions of IEEE P802.3bm standard. CWDM4 interfaces with LC duplex connectors. It converts 4 input channels of 25Gb/s electrical data to 4 channels of CWDM optical signals and then multiplexes them into a single channel for 100Gb/s optical transmission. Specifically speaking, four lanes with center wavelengths of 1270nm, 1290nm, 1310nm and 1330nm are controlled on the transmitting end. On the receiving end, four lanes of optical data streams are optically de-multiplexed by an integrated optical demultiplexer. With an optical multiplexer and de-multiplexer, one just uses a duplex single-mode fiber to connect two CWDM4 QSFP28 optical transceivers.

 

A Comparison of QSFP28 4WDM and QSFP28 CWDM4

QSFP28 100G CWDM4 and QSFP28 4WDM are defined with different distances(respectively are 2km/10km/20km/40km) and wavelengths(respectively are CWDM wavelength and LAN WDM wavelength). 2km and 10km use CWDM wavelength. 20km and 40km use LAN WDM wavelength.


With the different size of the CWDM and LAN WDM wavelengths, the wavelength-transmitting TOSA for LAN WDM must be carried with a TEC (Thermo Electric Cooler). As the stable wavelength drifts with temperature, TEC consumes an extra 0.5W of power, so the overall power consumption of optical transceivers with LAN WDM wavelengths will be higher than that of CWDM optical transceivers.

 

By above comparison of QSFP28 CWDM4 and QSFP28 4WDM optical transceiver, the difference between them are very apparent. For QSFP28 4WDM series optical module, Gigalight has currently pushed out 100G QSFP 4WDM-40 and 100G QSFP 4WDM-20 optical transceiver module, but the QSFP28 4WDM 40km optics is the key one for promotion at present. If you want to know more information about the products, pls visit Gigalight official website.
publié le mardi 15 mai à 09:27, aucun commentaire.

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