Recently, "Performing Arts" magazine to "theater construction and new technologies, new equipment" as the theme of the convening of the technical exchange. At the meeting, experts from Radio, Film and Television Design and Research Institute of China Radio, Film and Television Group Zhou Yaoping, director of the Testing and Certification Center of Film and Television Technology Quality Testing Institute of Radio, Film and Television, and other experts on the development trend of domestic and foreign cinemas, domestic theater construction and mainstream technologies, The construction of sound design, the status quo of theater standards, the use of screening equipment and operating conditions such as the implementation of the issue were discussed. "Performing Arts" to discuss the results posted on the Internet, and the introduction of the channel seems to be the mighty and immersive sound is not too concordant, how do you see? Let us look at the original.

Variations in the number of channels have not revolutionized the quality of sound

      On the multi-channel sound technology used, Zhou Yaoping explained his point of view. He believes that now multi-channel has been gradually developed from the stereo 3.1,5.1,7.1,11.1,15.1,64.1 even N +1, but the same, mainly the change in the number of channels, the sound quality is not revolutionary Sexual changes. The effects of sound effects, audio and video and other sound effects elements come from the front-end production, the end show is only a reduction of sound production, but the end demand (theater audience) on the front-end production technology changes can not be underestimated. Therefore, the end shows largely affect the movie technology direction. It should be pointed out that in the production of multi-channel effects, not all of the films need to use multi-channel performance, according to the story, the scene, with some targeted to create the environment of the lens, making more sound Road effect, as the crowning touch of the entire movie. In fact, a film multi-channel effect of the lens is not much, multi-channel use is with the environment, signal sources, plot and other factors associated, can not be abused. On the other hand, the reduction of multi-channel sound effects, the current size can accommodate dozens of small movie theater is also a few dozen square meters, can accommodate more than 100 people the size of the conventional movie hall also more than 200 square meters, and more Up to 64-channel speakers arranged in the depths of ten meters, and not to mention that so many speakers can be left in the open, only for such a dense speaker, the human hearing has been unable to resolve the positioning pitch so small sound source . In short, from the perspective of technological development, theater multi-channel technology has practical significance, but there is speculation, rendering components.

Foreign 3D movie market tends to shrink

      On the 3D technology, Chen Jiang emphasized two points, first of all, 3D is not a new technology, in the film period there, twenty or thirty years another cycle, there is no revolutionary technical breakthroughs; Second, due to the inherent 3D technology Characteristics, so that it has limitations, aside cost, film sources and other market factors, only the technical and human physiological structure, no matter what kind of 3D technology, more or less uncomfortable feeling after watching, so its Foreign markets tend to shrink. At present, although the projection using 3D technology in our country maintains a high rate of development, if there is no new development in technology, there will be no new breakthrough in the screening effect. I believe there will be fewer and fewer audiences favor 3D in a few years and the market will gradually become smaller Shrinkage. However, the 4K technology started to stir up in 2004 but was not widely accepted because of the lack of source and equipment at the time. The key problem was that the 4K subjective perception of viewing quality was not significantly improved and 2K was basically satisfactory People's requirements for quality. At the same time, the application of high frame rate technology, on the contrary, enhances the quality of the picture, which is especially noticeable. In particular, the improvement of the dynamic definition improves the technical means of photography and other production links accordingly Supporting.

Laser light projector gradually matures

      Chen Jiang talked about the laser light source. He believes that the laser light source is maturing, whether the formation of technical models and standards remains to be seen. The early light source of the projector adopts carbon rod, the current mainstream light source is the xenon lamp, the power is in the range of 2000 W to 7000 W, the luminous flux is in the range of 8000 lm to 30000 lm. Since the curtain width is generally above 20 m, Xenon projector brightness is difficult to meet the entire curtain, often require two. The laser light source because of its modular structure, a module brightness of up to 5000 lm (such as "Christie"), the module can be superimposed manner to achieve the purpose of brightening. In theory, the module can be infinitely superimposed, but in fact also consider the machine, the chip on the heat capacity.

      At present, foreign laser light source products can do 60 000 lm ~ 80 000 lm, the country can do 50 000 lm. Obviously, using a laser light source has the advantage that a xenon light source giant screen requires two projectors, and a laser light source can be used with a projector to achieve the same effect, with a long-term cost advantage. Xenon lamp itself has some limitations, such as xenon lamp bulbs short life and high cost, light bulbs heat exhaust noise, often in the show due to prolonged operation to produce high temperature and explosion, security risks are very difficult issue. Laser light source for the cold light source, without this hidden danger, reduce maintenance costs, to solve the noise problem. However, the use of laser light sources must pay attention to its human safety issues, the reason why the delay has not yet introduced the application of foreign products, not in technical problems, foreign products related to human safety has a set of safety certification procedures and strict supervision. From the application prospects, Xenon lamp is still the mainstream within five years. With the development of technology, one-time investment in laser light source is reducing. At present, the projector of three-color laser is more expensive, but the price of monochromatic laser projector can compete with the price of xenon projector. As for the commercial products of laser light sources, although the development of domestic technology started before, the brightness reached 8,000 lm in 2006, but the process of commercialization lagged far behind. Currently, there are more foreign brands such as Barco and Christie .