HD monitoring application technology started from the peak
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In this year's GDSF Digital Monitoring Forum, HD is still repeatedly emphasized monitoring technology, which can be used in high-definition products from IP network cameras, including HD-SDI matrix and digital HD cameras and SDI-DVR digital HD HD HD product technology applications such as video recorders, SDI video servers and SDI fiber transmission and conversion interfaces have enabled engineers to have more layers of HD applications and technology choices for IP networks, as well as IP networks. High-definition technology is surpassed by full HD technology to reach ultra-high-definition surveillance technology applications such as 5 million and 8 million. This can also be seen by about one-third of the vendors in the forum newsletter. Of course, some manufacturers will not forget the analog high definition solution in the GDSF activities, except for HD-SDI. Some manufacturers also use this opportunity to explain the 960H high-line analog video camera application technology in this activity. With introduction. Through the application of these three types of high-definition high-definition camera technology, we can see that the high-definition surveillance application technology is not in the growth of a technology and market, but in the same integration of various high-definition systems. With the application technology, HD surveillance is starting from the peak position.
Reducing bandwidth load becomes a technical consensus
HD monitoring technology has been extensively explored in this forum. In fact, there are two core technologies in which almost all participating GDSF vendors will pay attention to the technical focus of the discussion and Xuan Yang. The first and more important is how to reduce HD monitoring. The bandwidth requirement", of course, refers to the situation and requirements under the high-definition conditions of network monitoring, but in fact, it is not only the IP network HD but also the SDI and 960H back-end. In digital storage and transmission, bandwidth load and picture smoothness technology are still one of the inevitable technical obstacles. From the repeated appearance of the manufacturer's briefings in the entire GDSF activities and the adjectives such as the number of swords used, we are not difficult. Understand the concerns and emphasis of manufacturers on this topic. Here, we also share the following 11 ways to reduce the content and bandwidth of high-definition video content through the manufacturer's information and share the following ways to discuss whether these technologies are better or not. The way, the 11 ways to reduce the network monitoring bandwidth mode are as follows:
1. ImageCropping: Cut out the unnecessary part of the sky to reduce the file size, dynamically cut invalid images, reduce data flow and reduce compression pressure.
2. Automatically switch modes according to different lighting modes (Day/NightModeAdjustment): Use the preset mode (Day, NightModeautoswitch) to adjust the camera to the best picture quality with the change of environment to reduce the image data flow.
3. E-PTZ electronic partial amplification application: make good use of electronic partial amplification to reduce the large bandwidth required for optical magnification of the picture, and the electronic pan/tilt pays attention to local fine images with electronic dynamics.
4. Storage Replenishment (EdgeStorage): The front end of the camera adopts SD card slot and memory card as the temporary storage mechanism. It stores the take-over in the “zero-second†front-end of the image disconnection, and then returns the back-up and HD compensation after recovery.
5.AAS (ActivityAdaptiveStreaming) dynamic adaptive video stream adjustment: dynamic adaptive video stream adjustment, general million network camera, support activity self-adjustment streaming to dynamically allocate bandwidth to use the specific playback rate based on the specific needs of the configuration. For example, normal monitoring can identify images only when needed, and the picture playback rate can be set as low as 1 fps - to reduce bandwidth usage.
In the case of a trigger event, the picture playback rate will increase to a higher level such as 30fps - allowing for smooth, high quality video sources. In this way, excellent image quality and bandwidth usage can be ensured simultaneously during recording.
6. Image Compensation (ImageCompensation): Only the compensatory picture quality of the key parts of the image is improved, and the rest is discarded. This can reduce the image file and reduce the bandwidth requirement.
7. SVC (Scalable Video Coding) bandwidth adjustment: SVC (Scalable Video Coding) adjustable image coding, is a scalable image coding technology, compared to the current H.264AVC (AdvancedVideoCoding) compression specifications used by network cameras, H The .264 SVC is a new generation of coding technology that saves more bandwidth.
8.SVAC (SurveillanceVideoandAudioCoding) video compression coding: This technology can be explained from the above seven levels of integration, that is, the way to integrate the above method, the intention is also to reduce the image bandwidth.
9. Dynamic Streaming Network Transmission Technology (HybridCBR/VBRStreamingTechnology): In the hybrid CBR/VBR streaming mode, it can automatically determine the network bandwidth conditions and changes, and achieve the effective use of bandwidth to transmit streaming data.
10. Digital Image Noise Reduction Technology (Digital FilterNoise Reduction Technology): Through digital filtering technology, it can identify and filter the meaningless interference noise in CCD/CMOS signals. In addition to the improved picture resolution, it also greatly reduces the image coding rate. .
11. Progressive Scan's convergence technology: digitally connect the sequential scanning CCD/CMOS sensor to the compression core (Codec) to avoid eliminating the problem of interlaced signals and making the image clearer, especially The identifiable rate of moving objects. Through these key technologies, the company's network cameras can transmit 1600x912@15fps, 2Mbps (bandwidth), 1280x720@30fps, 2Mbps (bandwidth), D1@30fps, 784Kbps (bandwidth), VGA@30fps. The smooth transmission of audio and video at the same time, such as 512Kbps (bandwidth), maintains high-definition image performance, and requires only a very low network bandwidth.
The above 11 technical methods are based on the integration of the current manufacturers in the technical quality of the forum, and are also extremely important activities of the technical components.
ISP's image processing application technology quality improvement
HD application technology in the second core technology is also the focus of all participating GDSF vendors to focus on the "ISP high-definition image processing technology quality" from the application of components to the description of the finished camera, color, clarity, white balance, noise reduction The image processing functions that are burdened by ISP components such as wide dynamics and intelligent analysis have also appeared in the presentations of the manufacturers in this application technology. In particular, intelligent analysis and wide dynamic technology have been repeatedly used by manufacturers in this activity. The technical improvement of the video image comparison method, plus a few one or two manufacturers specifically for the CMOS components and ISP matching technical requirements and capabilities analysis, so that this GDSF participating in the engineering company must have image processing technology and product selection Great help, especially in AGC/automatic gain, AWB white balance, 3D noise suppression function to reduce noise, e-PTZ electronic amplification, key area imaging technology, electronic shutter adjustment and BLC backlight compensation. The technical part of the briefing has been repeatedly emphasized.
In addition, in the detection of IVS intelligent alarm system, face detection, anti-vanism detection, audible alarm detection and Motion detection, as well as product self-diagnosis function technology are also improved in ISP image processing technology. Focus.
Monitoring platform application technology is rapidly idling
Another technical observation of this GDS Digital Monitoring Forum is the application technology part of various monitoring platforms. From the forum, about one-third of the vendors are conducting various integrated and industrial or physical entity security (PSIM). According to the discussion of platform application technology, whether it is an all-IP network monitoring platform or an integrated integrated platform, or even a relatively special PSIM entity security management platform has gradually entered the war-torn countries during the technological improvement and application industry. Realm. Regardless of the type of platform and the intention, the platform's integrated technology management definition is mostly defined in this GDSF activity as a unified management of multiple unrelated security weak electronic systems under a common platform. The real integration is Management integration, to achieve a centralized management of multi-system, multi-device and multi-protocol, has a WYSIWYG capability, and is a real-time ability to obtain real-time response to real-time information. The emergence of platform systems provides engineering integrators with an easy way to have such capabilities. At the same time, in the application technology part of the platform, the vendors participating in the forum also do not evade the difficulties in integrating compatible technologies, as well as the monitoring application technology that needs to be overcome under the consistency of the standards and the characteristics of the products themselves. It is still the goal of platform standardization.
Important forum technical issues outside the mainstream
In addition to the above four technical issues that are of concern to the manufacturers and contractors of this year's GDSF, in addition to the transmission, especially the IP network monitoring, it is also the application of the cable application in twisted pair and coaxial. The technical component of the forum is more important than the security manufacturers, because after all, it is a forum for digital monitoring. For the application of the original coaxial or hard-wire cable to achieve digital monitoring, this is also a comparison. The unique application technology, the attention that the manufacturer receives in the briefing content at the event is natural. There is also a mainstream outside the mainstream of this event, that is, storage and cloud computing technology, storage hardware technology and Vsaas cloud technology discussed in five cities are indispensable application technologies in the mainstream of digital surveillance, although There are not many participating companies, but their newsletters and content are also listening presentations that attract projects and collectors. Finally, there is a secondary forum topic in the whole digital monitoring discussion. It is also a topic that will be brought or mentioned by participating manufacturers. This topic is a safe and safe city. The safe city has a long history of construction and technical quality. It has gradually matured, but at this GDSF event, we saw many vendors in the forum to introduce smart city concepts and application technologies into the case of safe cities, especially in the networking and integration of IoT technology and monitoring platform technologies. This is also one of the technical features of this year's Digital Monitoring Forum.
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