HD-SDI technology is currently developing rapidly, and under its leadership, the degree of HD in the security surveillance field is also increasing. Especially with the wide application of digital technology, it has laid a very good foundation for HD transmission. Therefore, this also creates a richer possibility for the improvement of video quality.
In the current high-definition technology, there is a word I am afraid that everyone will not be too strange - HD-SDI. Especially in our security monitoring technology, although the "age" of HD-SDI is purely a "small generation", but It has similar influences as CCTV. Below, let's take a closer look at HD-SDI technology and see what is the sacredness of this high-definition technology. A brief overview of HD-SDI technology Before mentioning HD-SDI, let's take a quick look at SDI technology. SDI is the abbreviation of serialdigital interface technology. It is translated as "high-definition digital component serial interface". Maybe you may be strange to this word, but if I want to say that it is digital uncompressed technology, I am afraid everyone can understand it. It is. HD-SDI is of course HD digital uncompressed technology.
Friends familiar with video transmission know that after the video has been converted, there are currently two types of subsequent processing methods - compression and non-compression. Compared with the ordinary compression processing mode, the non-compression technology can guarantee the authenticity of the video quality to the utmost extent, and obviously it is more prominent in the consistency of the video playback. This also laid a good foundation for high-definition imaging.
As far as current technology is concerned, SDI technology is divided into three standards. But it can make more contributions in the field of video surveillance. I am afraid it is only HD-SDI. HD-SDI has the same basic electrical specifications as SDI, but its transmission rate is much higher than SDI. Because this standard provides 1080p HD resolution, it can retain all the details in the video to the utmost. It also guarantees almost the same continuity as traditional analog devices. Therefore, HD-SDI is now favored by video surveillance technology applications.
Strong HD-SDI advantage 
Video Reality and Coherence <br> As a transmission technology without compression mode, the fidelity of video and smooth transmission are definitely the main advantages of HD-SDI technology. Because HD-SDI works, unlike the working principle of the ip monitoring system, the video data is packaged and compressed before being transmitted to the network for transmission. Instead, it is sent directly to the transmission cable without compression. Better protection of signal stability and no distortion. In addition, since the SDI video is not time-consuming due to compression or decoding during the processing of the signal, it is guaranteed to be more consistent in the playback of the video.
System compatibility is very strong <br> Since in many HD-SDI projects, cable connectors are generally BNC connectors. The connection of these lines is basically the same as the traditional analog lines. In addition, in the compatibility of the analog monitoring system, the original system can be upgraded and the HD-SDI mode can be recognized. No more renovation work is needed. This also creates more convenience for the transition of traditional monitoring systems to HD-SDI systems.
Strong cable transmission capacity <br> Currently in the transmission of HD-SDI, coaxial cable is the main cable for device transmission. At work, the coaxial cable can not only transmit video, but also simultaneously transmit audio. Thereby the video matrix and the audio matrix in the analog system are combined into one. Very good guarantee of video and audio consistency. In addition, there are still many people who believe that coaxial cable is expected to achieve better integration in the future, and the circuit and audio and video will be transmitted in parallel, thus saving engineering investment. In addition to the above-mentioned advantages of HD-SDI in its working principle, HD-SDI has some advantages derived from its working characteristics. For example, in transmission, due to the integrity of the video signal, real-time performance can be very good. Guarantee, so in face recognition, detail capture, etc., it also has advantages over high compression ratio monitoring equipment.
The disadvantages are obviously difficult to cover the lack of system <br> Through the above introduction, it can be seen that based on the characteristics of no compression, HD-SDI brings us higher quality audio and video signals in the monitoring work. But it is precisely because of this technical feature that it has made many users look down on it. What is it because of this? First of all, we know that the audio and video signals that are not compressed are generally very large, and thus put a lot of pressure on the transmission and storage terminals. Currently, although the transmission of optical fibers is more or less a burden for the transmission of large amounts of data. However, the problem with storage terminals is still not to be ignored. If you use normal storage, then there will undoubtedly be huge expenses in terms of storage. This is very unfavorable for the popularity and application of HD-SDI technology.
In addition, the fixing of the protocol format has also imposed certain restrictions on the promotion of related technologies. Because of the transmission protocol, there are clear requirements for the location and bandwidth of data such as audio and video. Therefore, this also results in a single video format and a decline in the efficiency of broadband utilization.
On the other hand, in the competition with large-resolution monitoring equipment, the non-compressed standard HD-SDI technology also has obvious deficiencies. Because the high-resolution monitoring device has the characteristics of high resolution but low frame rate, it has a better embodiment at the level of intelligence. Currently, for the monitoring system, how to transmit audio and video simulation data to the data center more completely and truly is undoubtedly the most important. However, for HD-SDI, if it is compressed, it will inevitably reduce the effect and authenticity of the data, which makes it difficult to meet the intelligent work requirements, so this is also a contradiction in the development of HD-SDI technology in the direction of intelligence.
In addition, the transmission distance of coaxial cable is close, and the resolution is small, which is also a disadvantage of HD-SDI technology.
At the crossroads, HD-SDI development is fascinating. HD-SDI technology does play a very important role in improving image quality. Make the effect of video surveillance more secure. Among these contributions, the effect of no compression is very obvious. However, as mentioned above, while benefiting users, it also brings headaches to users who rely on HD-SDI technology.
Throughout our current video surveillance market, high definition, networking and intelligence can be said to be the mainstream trend of market development. For HD-SDI monitoring equipment, the degree of compliance with HD is self-evident. But if you talk about networking and intelligence, you can't help but admit that this is a difficult problem for HD-SDI. Currently, the main means of implementing networked and ensuring smooth network transmission is to compress data. However, the HD-SDI technology that can't be pressed is undoubtedly bound by the huge transmission data on the island of the traditional transmission mode, making it difficult for itself to "on the Internet." The low level of remote monitoring and network integration also affects HD- The intelligent level of SDI equipment has increased. In addition, the huge storage also makes many units afraid to deploy such monitoring equipment on a large scale, which may be dragged down by heavy storage pressure. Therefore, if this "follow-up" development model continues, the future of HD-SDI will be difficult to succeed.
However, abandoning the uncompressed nature of HD-SDI may affect the quality of monitoring and make such devices lose their maximum advantage. Therefore, how to go in the future is the most tangled problem of HD-SDI equipment. Today, HD-SDI is like a crossroads, and the choice of direction will determine the future of HD-SDI technology. But in the face of such direct demand conflicts, HD-SDI's tomorrow may still need more open development ideas to develop.
In the current high-definition technology, there is a word I am afraid that everyone will not be too strange - HD-SDI. Especially in our security monitoring technology, although the "age" of HD-SDI is purely a "small generation", but It has similar influences as CCTV. Below, let's take a closer look at HD-SDI technology and see what is the sacredness of this high-definition technology. A brief overview of HD-SDI technology Before mentioning HD-SDI, let's take a quick look at SDI technology. SDI is the abbreviation of serialdigital interface technology. It is translated as "high-definition digital component serial interface". Maybe you may be strange to this word, but if I want to say that it is digital uncompressed technology, I am afraid everyone can understand it. It is. HD-SDI is of course HD digital uncompressed technology.
Friends familiar with video transmission know that after the video has been converted, there are currently two types of subsequent processing methods - compression and non-compression. Compared with the ordinary compression processing mode, the non-compression technology can guarantee the authenticity of the video quality to the utmost extent, and obviously it is more prominent in the consistency of the video playback. This also laid a good foundation for high-definition imaging.
As far as current technology is concerned, SDI technology is divided into three standards. But it can make more contributions in the field of video surveillance. I am afraid it is only HD-SDI. HD-SDI has the same basic electrical specifications as SDI, but its transmission rate is much higher than SDI. Because this standard provides 1080p HD resolution, it can retain all the details in the video to the utmost. It also guarantees almost the same continuity as traditional analog devices. Therefore, HD-SDI is now favored by video surveillance technology applications.
Strong HD-SDI advantage
System compatibility is very strong <br> Since in many HD-SDI projects, cable connectors are generally BNC connectors. The connection of these lines is basically the same as the traditional analog lines. In addition, in the compatibility of the analog monitoring system, the original system can be upgraded and the HD-SDI mode can be recognized. No more renovation work is needed. This also creates more convenience for the transition of traditional monitoring systems to HD-SDI systems.
Strong cable transmission capacity <br> Currently in the transmission of HD-SDI, coaxial cable is the main cable for device transmission. At work, the coaxial cable can not only transmit video, but also simultaneously transmit audio. Thereby the video matrix and the audio matrix in the analog system are combined into one. Very good guarantee of video and audio consistency. In addition, there are still many people who believe that coaxial cable is expected to achieve better integration in the future, and the circuit and audio and video will be transmitted in parallel, thus saving engineering investment. In addition to the above-mentioned advantages of HD-SDI in its working principle, HD-SDI has some advantages derived from its working characteristics. For example, in transmission, due to the integrity of the video signal, real-time performance can be very good. Guarantee, so in face recognition, detail capture, etc., it also has advantages over high compression ratio monitoring equipment.
The disadvantages are obviously difficult to cover the lack of system <br> Through the above introduction, it can be seen that based on the characteristics of no compression, HD-SDI brings us higher quality audio and video signals in the monitoring work. But it is precisely because of this technical feature that it has made many users look down on it. What is it because of this? First of all, we know that the audio and video signals that are not compressed are generally very large, and thus put a lot of pressure on the transmission and storage terminals. Currently, although the transmission of optical fibers is more or less a burden for the transmission of large amounts of data. However, the problem with storage terminals is still not to be ignored. If you use normal storage, then there will undoubtedly be huge expenses in terms of storage. This is very unfavorable for the popularity and application of HD-SDI technology.
In addition, the fixing of the protocol format has also imposed certain restrictions on the promotion of related technologies. Because of the transmission protocol, there are clear requirements for the location and bandwidth of data such as audio and video. Therefore, this also results in a single video format and a decline in the efficiency of broadband utilization.
On the other hand, in the competition with large-resolution monitoring equipment, the non-compressed standard HD-SDI technology also has obvious deficiencies. Because the high-resolution monitoring device has the characteristics of high resolution but low frame rate, it has a better embodiment at the level of intelligence. Currently, for the monitoring system, how to transmit audio and video simulation data to the data center more completely and truly is undoubtedly the most important. However, for HD-SDI, if it is compressed, it will inevitably reduce the effect and authenticity of the data, which makes it difficult to meet the intelligent work requirements, so this is also a contradiction in the development of HD-SDI technology in the direction of intelligence.
In addition, the transmission distance of coaxial cable is close, and the resolution is small, which is also a disadvantage of HD-SDI technology.
At the crossroads, HD-SDI development is fascinating. HD-SDI technology does play a very important role in improving image quality. Make the effect of video surveillance more secure. Among these contributions, the effect of no compression is very obvious. However, as mentioned above, while benefiting users, it also brings headaches to users who rely on HD-SDI technology.
Throughout our current video surveillance market, high definition, networking and intelligence can be said to be the mainstream trend of market development. For HD-SDI monitoring equipment, the degree of compliance with HD is self-evident. But if you talk about networking and intelligence, you can't help but admit that this is a difficult problem for HD-SDI. Currently, the main means of implementing networked and ensuring smooth network transmission is to compress data. However, the HD-SDI technology that can't be pressed is undoubtedly bound by the huge transmission data on the island of the traditional transmission mode, making it difficult for itself to "on the Internet." The low level of remote monitoring and network integration also affects HD- The intelligent level of SDI equipment has increased. In addition, the huge storage also makes many units afraid to deploy such monitoring equipment on a large scale, which may be dragged down by heavy storage pressure. Therefore, if this "follow-up" development model continues, the future of HD-SDI will be difficult to succeed.
However, abandoning the uncompressed nature of HD-SDI may affect the quality of monitoring and make such devices lose their maximum advantage. Therefore, how to go in the future is the most tangled problem of HD-SDI equipment. Today, HD-SDI is like a crossroads, and the choice of direction will determine the future of HD-SDI technology. But in the face of such direct demand conflicts, HD-SDI's tomorrow may still need more open development ideas to develop.
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