[Home Theater Network HDAV.com.cn] From CRT to the current LCD TV, after only a decade or so, LCD TV has more than 90% market advantage, announced the perfect curtain call of the CRT Dynasty. The development of LCD TVs has been greatly improved in technology, however, it has also encountered bottlenecks in development. With the launch of OLED TV, LCD seems to be stepping into the footsteps of CRT, and everything seems to be so logical. However, is this really the case?
Zhong Yikang's home appliance research expert Zuo Yanzhen believes that in the process of LCD's pursuit of display effects to OLED technology transfer, HDR technology has increased brightness, enabling users to have a cinema-level HD experience at home. It has become an important technical highlight and technical direction of the current mainstream TV manufacturers in addition to 4K technology. Under the obvious effect of the new OLED technology, LCD needs to strengthen its advantages through HDR technology and quantum dot technology to occupy the mainstream market position. LCD technology may be eliminated in the future, but in the current market, it has been the consumer's first choice for a long time, especially in the HDR technology and quantum dot technology, the speed of OLED becoming mainstream may be delayed or change.
HDR is the last short board of the LCD TV
The development of video formats has been very rapid in recent years, from resolution, the earliest standard definition to the current 4K, even 8K; grayscale from 6bit to mainstream 10bit; color gamut from DCI P3 to BT.2020; frame number from From 24p to 60p, the indicators have reached the forefront of the current state of the art, and only the high dynamic range of brightness has stayed at the SDR level, which has lowered the level of the entire industry.
HDR technology has emerged as a result of the high brightness dynamic range in the development of the entire video format. Many people don't understand what HDR means. In fact, this word is not a new word in the photography circle. HDR is an abbreviation of high dynamic range image, where dynamic range refers to the range and contrast of brightness, and high dynamic range has wider brightness and darkness. Brightness range and higher contrast between light and dark, it is to expand the contrast between the bright and dark areas of the image and the image detail.
Still photography combines to capture detail by capturing multiple images of the subject at different exposures. The problem is that photos in still photography are often distorted and look like counterfeit, and HDR solves this problem. Unlike HDR, it looks very realistic, and grayscale and detail are almost a real life restoration. It simulates light reflections, making both light and dark look very natural. What's important is that in both cases, it still presents subtle details and subtle tones. HDR has different effects from filters and glows. It uses a new panel technology with a wider palette and specially coded video.
In fact, HDR is strictly a standard, not a function. People have a certain range when looking at the brightness. Usually this range covers 1:105. This range is called the typical range of the human eye. Within this range. The human eye can feel the entire brightness, but this range is not fixed, it can move in the high and low light range without zooming in.
The role of HDR video is to cover the range that the human eye can see, which is 1:105. Generally speaking, it can make your eyes see the video and the real world see things in the same way, the restoration is closer to reality. The visual perception of the environment.
By the same token, the recent HDR TVs are using the new OETF and EOTF HDR technology based on improved shooting and display dynamic range, and the ability to express latitude in TV systems to 105:1 with higher quantization accuracy. And compatible with the current SDR viewing device. In contrast to SDR, it is like creating a larger coordinate system that reproduces a larger color gamut and a higher dynamic range of brightness.
Lu Jianbo, deputy secretary general of the China Electronics Chamber of Commerce, said that HDR technology has become a new highlight of television. Different from mobile phone HDR technology, which simply increases exposure and pixels, TV HDR can provide more dynamic range and image details for TV viewers by controlling the brightness of different regions of the TV. It can also better reflect the reality. Visual effects in the environment. Not only does it extend the contrast and color range of the image. Color quality will also be improved, and colors such as blue, green, and red will become more prominent. HDR technology and other display technologies can be well combined to greatly improve the quality of the image.
HDR resources are hard to find industrial chain integration is crucial
The HDR technology video picture in the 4K standard has amazing brightness and color expression range, black is deeper, the high-gloss picture still maintains the details, and the color presented by the TV is more vivid, which can greatly enhance the TV viewing experience of people, realized in 4K movies. Peak image quality and color performance, this technology also enhances the dark parts and highlights, bringing a dynamic range of brightness closer to the human eye. Through HDR technology, the three-dimensional color gamut space can reach dozens of times of ordinary TV, which can bring a better visual experience. However, similar to the current situation of 4K video, there are two prerequisites for enjoying the HDR effect. The TV can support HDR technology and must have HDR sources. There are not many movies and TVs currently supporting HDR on the market.
In the real world, objects that reflect light to the human eye will show color and brightness. For TV, the state of the art can't restore the true light and shadow contrast scene viewed by the human eye. This is related to the TV itself. Display technology limitations, while video capture and transmission also restricts the TV's expression of light to dark ratio.
There are a lot of movies and TV shows that are shot in HDR. For example, the movie "Han Yue Chuan" is very hot. Usually, you want to shoot HDR movies. You must use a 5 digits camera. Then you must pass the 5 digits transmission instrument and import it. In the HDR TV terminal with 5 digits, the most original picture can be finally rendered, and the lack of one of them will not be realized. However, in order to take care of the contrast performance of the display device, the dynamic range is compressed to 3 digits, many people are indeed HDR video when shooting, but after transmission to other devices, after compression, the HDR signal is lost.
The conditions for making HDR movies are demanding. It requires more than just a camera or TV. What is needed is the support of an entire industry chain. Sony has great advantages in the HDR industry. On the shooting side, Sony has the ability to Recording HDR high dynamic range 4K, 8K cameras, such as Sony's F55, F65 professional camera has long supported HDR, supporting a very wide range of brightness.
A few days ago, BTV 2016 Spring Festival Gala recorded the scene, all cameras recorded images with high dynamic range and wide color gamut standards, Sony actively promoted HDR development, bringing users a better visual experience.
In terms of transmission, HDR content has more detail than video content, so video files will be larger than non-HDR content. With the past video compression technology and Blu-ray disc capacity, it is not suitable for HDR content for a long time. Nowadays, the speed of home network is increasing, and with the development of new ultra-high-definition Blu-ray standards, the spread of HDR content is not difficult.
On the display side, the past has not considered the use of HDR format to create content, but also because the TV performance is not strong enough, the TV's image chip can not process a large amount of information of HDR content in real time. So even with HDR content, the TV can't be put. Nowadays TV performance is getting stronger and stronger, and it has already met the requirements of processing HDR content. For example, Sony recently introduced several HDR TVs, especially the recently launched X9300D. Based on HDR, using optimization technology, it can fully restore The performance of HDR content.
HDR technology promotion upgrade will become an important life-saving magic weapon for LCD TV
Promoting the continuous development of the color TV industry is display technology, in which the brightness range and partition technology are two major problems of display technology. Dr. Jin Chaoli, editor-in-chief of Beijing Business Daily Digital Weekly, said in an interview with the Home Appliances Alliance reporter who will have a new display technology who will win in the future, otherwise it will be eliminated.
In recent years, all color TV manufacturers, including Internet companies, have begun a chase for TV quality problems. Regardless of whether it is a "small battle" or a variety of "non-consideration" of projection TV or OLED TV, the application of HDR technology has become an important weight for major TV manufacturers at home and abroad to win the market.
LG and Skyworth, which are the main OLED technologies, and Konka, which is the latest OLED camp, added HDR to the latest TV products. Samsung and TCL of the curved quantum dot camp also adopted HDR in new products; Hisense also owns proprietary projection TV. The new product is equipped with HDR to enhance the contrast of the LCD TV screen and the accuracy of the color. Even Internet TV brands such as Xiaomi and LeTV have followed suit and launched 4K high-definition HDR TV.
Sony has been an active advocate of the HDR standard, using a new dynamic backlight system in the field of HDR technology, through the unique dual light guide + 4 sets of high-performance LED lights, a new backlight system to achieve accurate local vacant light. According to the reporter, Sony HDR TV can currently achieve a brightness of 4000 nits and more than 1000 light control areas.
In addition, in response to the current scarcity of HDR content, Sony has pioneered the SDR enhancement technology through the development of its technology and hardware, such as the Tricky color display technology and the powerful 4K image processing chip. The ability to improve the most common SDR content close to HDR effectively compensates for the current scarcity of the source.
Compared with HDR in the short-term hot market, the development of unified norm standards is imminent. According to the reporter's understanding, the relevant authorities and color TV giants have begun to discuss the planning and formulation of standards, and believe that HDR will definitely become the new standard in the TV industry. More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website.
Note: This article is transferred from the Home Appliances Alliance. The article is an independent view of the author and does not represent the position of the home theater network.
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