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  • HD network security monitoring is an inevitable trend

        HD ip camera Maximum resolution greater than 720P (1280 * 720) greater than 12FPS continuous acquisition even meet or exceed the 1080P (1920 * 1080) network cameras. For video surveillance systems, image clarity is the most critical features. Because the sharper the image, the more details, the higher the accuracy of the user viewing experience better intelligence applications business will be seen, the introduction of high-definition performance will bring a series of all aspects of the practical application of video surveillance business leap improved.
       HD monitor has not completely universal, the technology is also in constant development, so the concept of the market for high-definition is not so clear, so the in explaining before HD with NVR association, we first need to understand what HD monitor several core concepts: megapixels or 720p video resolution of the monitoring equipment can be referred to as high-definition, in fact, megapixels and 720p both still have big differences. 720p from HDTV standard developed by the American Film and Television Engineers (SMPTE). According to the standard, truly meet the HD video format, there are three: 720p (1280 * 720) resolution, 1080i (1920 * 1080) resolution, 1080p (1920 * 1080) resolution. HD video standard originally used for radio and television industry has been the video surveillance industry as a recognized technical standards and common in use. Megapixels is not an accepted standard, and it is actually specifically refers to the number of network camera´s image sensor elements. When a high-definition IP cameras with more megapixels performance, in fact, also does not know the camera´s frame rate is how much the video aspect ratio, interlaced or progressive, how to color fidelity, and these information but also the key indicators to measure the performance of a high-definition IP cameras. Therefore, as the industry standard, it is clear that more practicality HDTV standards.
       HD IP camera video coding standard MJPEG and H.264. Compression efficiency The the MJPEG (MotionJPEG) is in JPEG basis for the development of dynamic image compression technology, although it has certain advantages, but very obvious defects, include frame dropping serious timeliness bad; low transmission bandwidth and storage space large . H.264 is the ITU-T and ISO jointly established the JVT Joint Video Working Group to develop the new generation video coding standard, saving more than 80% of the bit rate not only than MJPEG, and has better support for network transmission function, thus lower bandwidth to achieve 720p, 1080i / p HD video resolution of the broadcast.
       HD monitor the front-end is inevitable hd ip camera, the SD monitoring can be divided into analog, digital and network three types, the front end of the monitoring system can use various types of analog cameras, network cameras, video encoders, analog cameras, However, in high-definition monitor, the front end must be high-definition IP cameras. First of all, after collection of uncompressed high-definition video signal with both analog and digital transmission mode, analog mode or digital transmission, uncompressed HD video signal transmission costs will be much higher than the previous analog SD video signal, therefore, visible transmission of high-definition video signal can not continue to be used in the past in SD system transmission mode, and only video coding and transmission over an IP network, and this transfer means and SD systems, transmission The cost difference is minimal. Second, due to the high cost performance characteristics of CMOS HD video sensor, the direct use of high-definition network camera front-end processing efficiency and cost advantage than HD cameras with HD video encoder.

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