From the system level, a complete HD system needs to be composed of collection, transmission, processing, storage, and display. DVR is in the middle of it. Its high-definition development not only requires its own upgrade and change, but also needs the support of other links.
In promoting the development of DVR towards high-definition, many problems need to be solved.
Challenge 1: Capture high-definition video capture is the source link. The importance of this link is not much to say. At present, the development of this link has basically entered the fast lane, and most monitoring companies have introduced various types of HD network cameras: resolution from VGA resolution to 5 million, or even higher pixels; product type has a gun type , indoor hemisphere, mini-hemisphere, card type, etc. to outdoor hemisphere, etc.; industry applications have also been further subdivided, such as financial special, traffic-specific ... ... Although the product is rich and varied, but HD network cameras still need to address standards, ease of use, And smart application issues.
Challenge 2: Transmission In the SD era, 100M network card transmission is sufficient for the communication network. However, once HD is on, 1 HD video needs 8M bandwidth at the minimum, if there are 16 to 32 HD channels or even 64 channels of HD data at the same time. Into the HD DVR, even a 1000M network card may not be sufficient. Therefore, one or two or more network adapters must be used for load balancing.
Challenge 3: The large amount of data that can be stored in high-definition video not only brings trouble to network transmission, but also poses a new challenge to storage.
High-definition data relative to the standard definition of the amount of data, all of a sudden raised 4 to 5 times, the original enough for the SD system to use the IO bandwidth and storage capacity, at this time it seems powerless. Therefore, high-definition DVRs must study new storage technologies to increase IO bandwidth and storage capacity.
Challenge 4: Display HD video needs to be displayed to the client. At present, many manufacturers claim that their DVRs are high-definition, but there is no HDMI interface (high-definition multimedia interface), or there is only a display, such devices can not achieve "high-definition". Therefore, high-definition DVR must use HDMI high-quality transmission technology to achieve high-definition display.
In promoting the development of DVR towards high-definition, many problems need to be solved.
Challenge 1: Capture high-definition video capture is the source link. The importance of this link is not much to say. At present, the development of this link has basically entered the fast lane, and most monitoring companies have introduced various types of HD network cameras: resolution from VGA resolution to 5 million, or even higher pixels; product type has a gun type , indoor hemisphere, mini-hemisphere, card type, etc. to outdoor hemisphere, etc.; industry applications have also been further subdivided, such as financial special, traffic-specific ... ... Although the product is rich and varied, but HD network cameras still need to address standards, ease of use, And smart application issues.
Challenge 2: Transmission In the SD era, 100M network card transmission is sufficient for the communication network. However, once HD is on, 1 HD video needs 8M bandwidth at the minimum, if there are 16 to 32 HD channels or even 64 channels of HD data at the same time. Into the HD DVR, even a 1000M network card may not be sufficient. Therefore, one or two or more network adapters must be used for load balancing.
Challenge 3: The large amount of data that can be stored in high-definition video not only brings trouble to network transmission, but also poses a new challenge to storage.
High-definition data relative to the standard definition of the amount of data, all of a sudden raised 4 to 5 times, the original enough for the SD system to use the IO bandwidth and storage capacity, at this time it seems powerless. Therefore, high-definition DVRs must study new storage technologies to increase IO bandwidth and storage capacity.
Challenge 4: Display HD video needs to be displayed to the client. At present, many manufacturers claim that their DVRs are high-definition, but there is no HDMI interface (high-definition multimedia interface), or there is only a display, such devices can not achieve "high-definition". Therefore, high-definition DVR must use HDMI high-quality transmission technology to achieve high-definition display.
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