[Home Theater Network HDAV.com.cn] If you belong to someone who has become boring without a movie, have you ever thought of setting up a home theater system at home? Feel more than 100 inches with your family. Visual impact of the picture?
In fact, with the continuous improvement of the performance of the home theater projection system, the adaptability to the environment is getting stronger and stronger. Now it is not as difficult to install a home theater system. It is not necessary to construct the audio-visual room deliberately, but only through the living room environment. Establish a projection system for large screens. From the beginning of this issue, I will open the door to the home theater video system to build a guide for friends who love movies, and discuss the home theater signal source, signal transmission, home theater projector, home theater projection screen, etc. Knowledge, I hope that everyone can feel the big picture effect that is not inferior to the professional cinema at home. In this issue, I will focus on how to build a home 4K home theater system, including 4K signal source selection, 4K transmission mode, and the type and characteristics of 4K home theater. I believe that from the previous introduction In the special report of CES2016, you have already seen that 4K will undoubtedly enter into our audio and video life, and there will be more and more affordable 4K home theater projectors for us to choose.
Not only UHD Blu-ray, but also a lot of 4K programming sources.
Regardless of the system, the signal source part is the most critical. When the 1080p home theater projector was introduced, the signal source at that time was mainly a 480p SD DVD player, even though the mid-to-high-end DVD models were Start with HDMI output interface, and even some models have built-in expensive video processing chip, which can upgrade the image signal of 480p standard definition, but it will not make full HD until the high-definition video such as Blu-ray and HD-DVD appears. Home theater projection systems are becoming more popular. Therefore, for 4K, the current situation is the same. Although many 4K home theater projectors have appeared in the past two years, and the price has become lower and lower, but lack of large-scale program source support, it is still difficult to upgrade the Blu-ray or high-definition digital TV as a 4K program source. The desire to buy most audio and video enthusiasts.
However, by 2016, you should not have to worry about the 4K signal source anymore. First of all, in the traditional CD, the UHD 4K Ultra HD Blu-ray discs waiting for a long time have finally settled. The world's three major film production companies Warner Bros., 21st Century Fox and Sony Pictures will have a large number of UHD 4K Ultra HD Blu-ray discs on the market. The total number will be more than 100. Now we can book some UHD 4K DVDs in advance through Amazon's official website, and the price is basically around $30, which is similar to when Blu-ray was just launched. In addition, in the playback equipment, at the CES2016 exhibition, including Panasonic, Sony, Samsung, Philips have UHD ultra-high-definition Blu-ray players, and the price is different according to the difference in the function of the player, from From a few hundred dollars to thousands of dollars, some models can also be booked through Amazon's official website. Despite the fact that UHD Ultra HD Blu-ray has not really entered the Chinese market, we don't have to wait for the thirst as in the previous two years. Anxious friends can directly experience the current 4K signal source with the best picture quality. It is worth noting that many UHD Ultra HD Blu-rays often support HDR high dynamic range technology, so you need to pay more attention when selecting discs.
In addition to UHD 4K Ultra HD Blu-ray, we can also choose the network 4K streaming service. Last year, Sony launched a 4K streaming service with a paid method in conjunction with China. It can watch 4K movies produced by Sony Pictures for a limited period of time through paid downloads. This year, Netflix, a well-known Internet streaming service provider in the United States, has officially entered Hong Kong and Taiwan. Users can watch the wonderful 4K TV series directly through the broadband network with bandwidth of about 25M and UHD TV with built-in Netflix player client. . Many online video sites in China have also started the production of 4K network unit dramas, including the "Hurry Year" of Sohu video, and the first 4K online drama released by LeTV in Hong Kong, "The genius is on the left and the madman is on the right". "Tao Nan Sister" produced by Xinheyi Film and Television. Taking Sohu video as an example, we can use the PC platform to directly play 4K programs through the Sohu video client, while the playback mode supports both H.265 and H.264 specifications. In addition, in the field of digital TV broadcasting, from the end of 2015 to the beginning of this year, many local stations have started to launch 4K channels. Therefore, in 2016, our 4K program sources have become more diversified, not only in the future. UHD Blu-ray.
Not only 4K native optional 4K projectors have many options
The above content solves the problem of the 4K signal source, then the next thing to consider is the display side, which is the part of the projector. Since it is necessary to set up a 4K home theater system, the projector part must of course use a 4K projector. However, the choice of 4K home theater projectors is slightly more complicated than that of full HD. The main question is whether we need to choose a 4K native model. The so-called 4K native model currently mainly refers to the home theater series model based on the three-chip 4K SXRD display chip brought by Sony. The physical resolution of the display chip reaches 4096×2160, and the pixel of the picture reaches more than 8 million pixels. At present, home theater projectors capable of 4K ultra-high definition display are not necessarily 4K original models, such as the 4K e-shift D-ILA series models brought by JVC, and the 4K reflective liquid crystal series machine brought by Epson. The 4K models with the affordable 4K DLP solution will be able to project 4K ultra-high definition images. These 4K models, the core part is still full HD level of the chip, mainly through optical processing to create 4K ultra high definition images.
Why is this happening? For home theater projectors, to effectively control the size of the fuselage, you must use a smaller size display chip, so that the rear optical engine and lens part will not be too large. The 1 inch display area is a balance point. For example, a full HD DLP chip is generally 0.65-0.93 inches in size, and an LCD chip is 0.74 inches in size, which is substantially no more than 1 inch. However, in the era of 4K Ultra HD, it is not an easy task to put more than 8 million pixels in a display chip smaller than 1 inch. Until now, only Sony with the strongest technological innovation can do it. The professional-grade 1.48-inch SXRD display chip is compressed into a 0.74-inch home-grade model. This is also so far, if you are looking for a 4K native home theater projector, there is only Sony. However, it should be emphasized that it is not that the 4K projector must be looking for a 4K native model. At the current stage, the non-native 4K model is equally competent.
From the aspect of picture quality, the non-native 4K model expands the pixels optically, and the edge contour details of the pixels are slightly weaker than the 4K native chips, and the fineness of the picture is different. However, because we are watching motion pictures, the human eye has low resolution for moving images, so it is difficult to detect the difference in dynamic image fineness, especially under the family viewing conditions (150-inch projection screen). , 3-4 meters viewing distance). From the perspective of compatibility of 4K signals, the latest generation of 4K models of major brands are equipped with HDMI 2.0 transmission terminals, which can process 4K signals of 4096×2160/60p or 3840×2160/60p, and are fully compatible with UHD. Ultra HD Blu-ray and network 4K streaming media source.
Therefore, when we want to choose a 4K home theater projector, there is no need to pay too much attention to whether or not to use 4K native chips. Except for the extremely discerning enthusiasts, we should pay more attention to the projector's light source, color and dynamic range. Aspect performance. For example, whether to choose a model based on a laser solid-state light source, or choose a model that supports HDR high dynamic range and wide color gamut.
Pay attention to choosing the right AV amplifier and long distance HDMI cable
After finding the right 4K home theater projector, basically the entire 4K home theater video portion can be determined, and then you need to consider the compatibility issues of other parts of the system. The first part is the AV amplifier. We need to see if it has the ability to pass 4K Ultra HD signals. Basically, the new models introduced in the past two years can support 4K video signal transmission. If your AV amplifier can only support full HD signal transmission, you should consider upgrading or switching to optical digital audio transmission. Of course, if you use a 4K source that supports two HDMI outputs, it is also a workaround, an output video signal and an output audio signal. In addition, if you want to consider the AV amplifier is also compatible with HDR 4K video signal transmission, you need to pay attention to the HDMI interface of the HDMI 2.0a.
For the transmission wire, if it is an HDMI cable within 10 meters, basically only the HDMI high-speed version of the wire can generally support, when you need to use HDMI cable for long distance transmission over 10 meters, you should pay close attention to it. Specifications, if possible, it is best to take a look at the official test report. If you want to use more than 15 meters of HDMI cable, I still recommend that you choose the wire with gain or choose HDMI to fiber.
Pay attention to the light output of the projector and choose the size of the projection screen.
Finally, let me talk about the choice of projection screen. In theory, to fully demonstrate the advantages of the rich detail level of 4K ultra-high-definition pictures, you should use a larger size projection screen. If the viewing distance is about 4 meters, it is recommended that the projection screen should be more than 150 inches. However, in terms of practical use, it is also necessary to consider whether the projector's light output can satisfy such a large picture. If you still need to watch 3D images, the requirements for the projector's light output are even higher. At present, the light output of the mainstream 4K home theater projector is basically below 2000 lumens. When it is necessary to project a 150-inch screen, it is better to use a screen with gain to enhance the energy of the overall picture. However, as the laser source gradually enters the home market, the light output of the 4K projector can exceed 3000 lumens, and can even be increased to 5000 lumens. At this time, you have to project 200 inches is not a big problem.
to sum up
All in all, when we consider building a 4K home theater system, the most important point is to find the right 4K signal source and the appropriate 4K projector, but also seriously consider the compatibility of AV amplifier, HDMI cable and projection screen. In the next issue, I will talk about the places that should be paid attention to when installing and adjusting the projector. How can I maximize the power of your 4K home theater system? What should I pay attention to before using the projector and how to make it simple? Please pay attention to the content of the screen correction. 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 HIFI. The article is an independent view of the author and does not represent the position of the home theater network.
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