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What is a 4K camera?

Nov 13, 2017

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What is 4K?


4K, "scientific name" Utra HD, that is, ultra-high definition. The 4K TV is a high definition resolution television (HDTV) upgrade. The Consumer Electronics Association of America (CEA) defines 4K television as a TV product with a screen of at least 8 megapixel and 3840 x 2160 resolution.


What we usually say 4K actually refers to 4K resolution, which ranges from 3840 × 2160 to 4096 × 3112, but to 3840 × 2160 resolution as the standard, most ultra-high definition TV or 4K high-definition television and more Screen with this resolution.


4K vs 1080p


4K and 1080p are two different resolution formats and 4K delivers up to four times the resolution of 1080p (1920 x 1080 pixels) HDTVs.


In spite of this, 4K content still can not be popularized in ordinary families. An uncompressed 2 hour 4K movie, 55TB for 30 frames per second.


In addition, 4K video needs a faster operating hard drive and very high speed internet connection for smooth playback. The current HDMI standard does not offer the advantages of 4K video, including the use of the HDMI 1.4 standard, a 4K display supporting up to 30 frames per second HD.


The new generation of HDMI 2.0 standard to play 4K video at 60 frames per second, but this technology is still widely used will take some time.


Some experts also point out that the screen size also has an impact on the definition of 4K content. Their audience can not tell the difference between 1080p and 720p on a small-screen TV, but the difference is noticeable on TVs 50 inches and above, especially for 4K TVs.


4K HD Network Camera


4K high-definition network camera using a new high-performance hardware platform, equipped with 12 million ultra-high-definition image sensor, with color reproduction accurate and natural, clean and delicate image quality and so on.


4K network camera refers to the resolution of 3840 * 2160 or 4096 * 2160, aspect ratio of 16: 9, in this standard CMOS progressive scan up to 2160P. Using 4K HD network camera Compared to the quality of 2 million pixels, higher vertical resolution, the screen detail level more accurate, clearer, cleaner and more delicate, but also gives the immersive feeling, you can effectively solve Need high-definition picture quality and lighting needs of the monitoring of complex places.




For 4K technology in the field of security applications, industry sources said that although the 4K monitoring product line is still in its infancy, but as the technology development and user experience, will lead the security industry other 4K related equipment and products Development, such as matrix, controller, DVR and so on. So follow-up 4K monitoring products are likely to replace FHD monitoring with FHD monitoring instead of HD monitoring.


Development obstacles


4K is a system-wide project, supporting the lens at least 800 million resolution, in order to give full play to the effect of 4K camera; higher network bandwidth: general transmission 1080P HD stream, as long as 2M-4M bandwidth, 4K resolution is 1080P Resolution resolution of 4 times, so at least 6M-8M, or even higher bandwidth. Of course 4K video camera with H.265 encoding will ease the transmission and storage pressure brought by the resolution increase. More backend decoding capabilities: For the back-end decoding equipment, 4K code stream requires more computational processing power. Larger Resolution Display Devices: Display devices must have at least 4K physical pixels to render nondestructive 4K images. Larger storage capacity: For storage devices, because 4K code stream rate greater, so the same code stream storage, need more storage capacity. More intelligent processing capabilities: for 4K resolution images, the number of objects in the screen more pixels, more details appear, for the intelligent video-based processing business, provides a more fidelity video processing images, It also requires more computing power to handle these richer details.

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