Tencent Digital (Bob) This year, HDR (High Dynamic Range) has become a new hot topic in the television field, successfully surpassing 4K. Obviously, after the improvement of resolution, people have higher requirements for picture quality effects, and HDR is undoubtedly a very promising technology. It can be applied to LCE/LED TVs to achieve the same effect as OLEDs, but the price Not as expensive as the latter.
Of course, there are also HDR standards, with Dolby Vision and HDR 10 being the mainstay. So, what are the differences between the two technologies and which one is the future standard? Take a look.
What is TV HDR?
First of all, we must understand exactly the concept of TV HDR. Unlike the HDR camera mode that a mobile phone has, TV HDR requires certain hardware and software. First of all, TV brightness needs to meet certain standards, especially LCD/LED TVs, because LCDs need to produce higher brightness (measured brightness) to achieve high dynamic range effects.
8-bit color (left) and 4-bit color (right)
Secondly, the TV panel needs to have a wide color gamut effect as much as possible. As can be seen from the figure above, there are obvious differences between 4-bit and 8-bit color images. The former is dim and loses a lot of details, even though the two resolutions are exactly the same.
Third, HDR needs content support, which also involves the standards we started with, Dolby Vision and HDR 10. At present, there are a large number of "HDR-compatible" and "HDR-enabled" televisions in the market, but this does not mean that they can handle HDR content.
Dolby Vision and HDR 10
As the two standards for current HDR video, there are some technical differences between Dolby Vision and HDR. First, Dolby Vision uses 12-bit color, HDR 10 uses 10-bit color, and from a gamut perspective, Dolby Vision is better. Of course, it is not ruled out that the UHD Development Alliance will release an upgraded version of HDR 12 in the future.
Secondly, Dolby Vision uses dynamic or continuous raw data to dynamically adjust each manufacturer's color and brightness, even for each frame, which is more flexible for content producers; while HDR 10 uses static data, also That means only segmented rendering. From this point of view, Dolby Vision is even better, and the film company can make detailed adjustments according to each scene to achieve better results, such as different settings for dim and bright scenes.
Finally, Dolby Vision does not require the HDMI 2.0A interface standard, and HDR 10 requires it, which is also a major difference.
Vendor support
Currently, TV manufacturers are widely compatible with HDR 10 standards, such as Sony, Samsung, LG, etc. Vizio, TCL, Skyworth and other manufacturers support Dolby Vision, and Dolby is also actively deploying Dolby Theater and ultra-high-definition Blu-ray and other fields. As for the content of resources, resources are not particularly rich because Ultra High Definition Blu-ray and 4K streaming media are still at the stage of development.
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summary
Obviously, HDR is a technology that may improve the quality of flat-panel TVs, but consumers do not need to be overly impatient. After all, the content of resources is still not perfect. HDR Blu-ray discs and streaming media applications that can be found in the market are still very limited. . Interestingly, Dolby said that Dolby Vision will soon be compatible with HDR 10, meaning that product compatibility may no longer be a problem in the future.
Source:techhive
.wxdigi { padding:20px 0; border-top: 1px dotted DBDBDB; }
Safety Controller
CSRME safety controller is developed for standard GB27607. By monitoring machine tool safety related equipment, the security of machine control system can meet the requirements of GB27607, and its security meets the requirements of ISO13849-1 (PLe) and IEC61508 (SIL3).
With rich interfaces, CSRME has limited programmable function. It can simultaneously replace many different types of safety control modules or safety PLCs, thus greatly simplifying the safety design of machine control systems and reducing cost.
Safety Controller,Modular Safety Controller,Safety Controller,Electrical Safety Controller,Programmable Logic Controller,Banner Safety Controller
Jining KeLi Photoelectronic Industrial Co.,Ltd , https://www.sdkelien.com