1 What is Blu-ray DVD Blu-ray Disc (BD) is one of the next-generation optical disc formats after DVD, which is used to store high-quality audio and video and high-capacity data storage. The name of the Blu-ray disc is due to its use of a blue laser beam with a wavelength of 405 nanometers (nm) for reading and writing (DVD uses a 650 nm wavelength red light reader and CD uses a 780 nm wavelength). A single-layer Blu-ray disc with a capacity of 25 or 27GB is enough to record a high-resolution movie for up to 4 hours. On February 19, 2008, with the announcement of HD DVD leader Toshiba, all HD DVD-related businesses were withdrawn at the end of March, and the next-generation DVD format battle was officially put to an end, and the SONY-led Blu-ray disc won. 2 What is the next generation audio track The next generation of high-definition audio tracks, in short, are the following five specifications, LPCM (lossless compression), Dolby Digital Plus (lossy compression), Dolby TRUEHD (lossless compression), DTS-HD High resolution (lossy compression) , DTS-HD Master Audio (lossless compression). These five kinds of audio tracks are the new audio track formats in Blu-ray Disc. Compared with the next-generation audio track, the normal audio track is like the mp3 of 256kbps code rate and the lossless flac and ape of CD compression. The sound quality difference is very obvious. The best way to enjoy these tracks now is to use HDMI to output the source code to the amplifier, which is decoded by the next generation amplifier. The output source requires several conditions: 1. The player has HDMI 1.3 interface (Dubular TRUEHD, DTS-HD Master Audio, two lossless compression formats); 2. Player software support. At present, the REMUX source on the network already has these next-generation HD tracks, so whether the player can provide the source output function becomes an important performance benchmark. Multi-channel LPCM: Lossless audio track original format, conceptually equivalent to wave file, does not require operation decoding, can be directly input into the power amplifier for DA conversion, LPCM audio track is usually used in the DVD era due to the high bit rate and volume. In the audio track of the two-channel music disc, on the Blu-ray disc, the transmission rate and capacity are greatly increased, giving the multi-channel LPCM audio track the opportunity to perform. Describe the LPCM track specifications, including sampling frequency, sampling accuracy and number of channels. The sampling frequency includes 48Khz, 96Khz and 192Khz. The higher the frequency, the stronger the ability to restore high-frequency signals and rich harmonics. The sampling accuracy includes 16bit and 24bit. The higher the precision, the higher the fidelity and the higher the signal-to-noise ratio, and the wider the dynamic range. However, a 96K24bit 7.1-channel LPCM code rate of approximately 18 Mbps will greatly crowd out the video transmission bandwidth, so high-quality lossless audio tracks still require lossless compression coding. 3 What is 4K? 4K resolution is the development trend of 4096 × 2160 pixel resolution, which is 4 times the resolution of 2K projectors and HDTVs, and belongs to ultra high definition resolution. At this resolution, the viewer will be able to see every detail in the picture, each with a close-up. If the theater adopts an amazing 4096×2160 pixels, no matter where in the theater, the audience can clearly see every detail of the picture. The color of the film is bright, the text is clear and sharp, and the ultra-real sound effect is true. It is an unspeakable enjoyment. 1080p can display effective pixels of 2,073,600 (1920×1080), Quad Full HD can display effective pixels of 8,294,400 (3840×2160), 4K can provide at least 10 million pixels of display quality, display fineness of more than 4 times 1080p . 4K Resolution (4K Resolution) is an emerging standard for the resolution of digital cinema and digital content. The 4k name comes from its horizontal resolution of about 4000 pixels. The 4K resolution common in the film industry includes Full Aperture 4K. (4096 x 3112), Academy 4K (3656 × 2664) and many other standards. 4K ultra-high definition digital cinema refers to a digital movie with a resolution of 4096×2160, that is, 4 thousand pixels in the horizontal direction, which is the highest resolution digital movie at present. At present, most digital movies in China are 2K, the resolution is 1920×1080, and some digital movies are 1.3K (1280×1024), and the so-called rural movie screening is 0.8K (1024×768). The true 4K movie was shot by a 4K camera and projected on a 4K projector. There are also 4K movies that are shot from 35mm film and then converted to a 4K number format. Since the resolution of a film movie is roughly equal to or slightly better than 4K, the clarity of the movie can be guaranteed after the transcription. For mainstream home appliance manufacturers, they are more inclined to manufacture Quad Full HD (3840×2160) devices that are close to 4K, because this resolution standard has a 16:9 display ratio, which is close to the viewing rate accepted by consumers. 4 What is panoramic sound Dolby Atmos is a new cinema audio platform developed by Dolby Laboratories on April 24, 2012. It breaks through the concept of 5.1 and 7.1 channels in the traditional sense, and can combine the content of the film to present a dynamic sound effect. Different from the previous audio signal control, one side speaker in the theater emits the same sound, which can make multiple speakers on one side emit different sounds one by one, and more realistically create sound effects from far and near; Surrounded by the sound field, it reveals more sound details and enhances the audience's viewing experience. As of the end of 2013, domestic cinemas in Beijing, Shanghai, Chengdu, Chongqing and other places have been upgraded to Dolby panoramic sound distribution; films produced using this technology have also been released. More and more viewers feel its great charm. 5 What is the original disk? The Blu-ray Disc refers to a digital copy of the officially released Blu-ray Disc. Blu-ray original BD must be the original copy of the data, no additions, deletions or changes to the original data and structure, but the changes are referred to by other names, such as BD-remux, BD-RE, BDRip, etc. . The so-called BD-, literal translation is the "Blu-ray movie - export, re-mix" format. It is made by copying all the contents of the original Blu-ray disc through software. After remux, it specially proposes the positive file in the disc package, that is, an m2ts file, which usually has a capacity of 15GB or more. This m2ts original file is generally named after 0000X.m2ts, which contains video, multiple audio tracks, PGS subtitles and so on. After the network HD fans got the m2ts original file, they separated the video, audio track and subtitle information, and then merged the video and audio track separately to make the ts format. The version obtained after this is called the BD-remux version. This is the clearest and most powerful HD movie format available in addition to the Blu-ray original. Its image quality and sound quality are basically the same as those of the Blu-ray original. Therefore, it is also the most original high-definition video format. 6 What is THX? THX is the acronym for Tomlinson Holman Experiment. It is not a sound standard like DTS or Dolby Digital sound. It is a certification, developed by Lucasfilm, designed for home theater quality assurance, and provides complete quality specifications for home audio-visual equipment (home theater). The THX standard is different from the international standard. Most standards have a tolerance range, but THX does not have a tolerance. There is only one minimum requirement, which must be exceeded to pass the test, eliminating the artificial trickiness. 7 What is IMAX? IMAX (short for Image Maximum) is a film projection system that can display larger and higher resolution than traditional film. The entire system includes film copies, projectors, sound systems, screens, etc., produced in IMAX specifications. The standard IMAX screen is 22 meters wide and 16 meters high, but it can be played on a larger screen, and there has been a growing number of IMAX screens. 8 What is a B-film? The so-called B-level film refers to a special film with low production cost, subject matter and director's techniques to cater to the audience (for which it is often not to avoid bloody, pornographic, and violent plots). This type of film is usually played at midnight because its stimulating images and themes make it easy for the audience to fall asleep even when they are extremely sleepy. After the next file, they are usually spread in the form of videotapes. For many years, B-rated films have always had a group of loyal followers. But in the Chinese world, the concept of B-level films is not universal, and Chinese people are also relatively unfamiliar with this kind of film. In the era of American blockbusters, it refers to the low-cost movies produced by second-rate movies. The movies usually have no big stars, but the types are like everyone, such as thriller films and horror movies. This is a standard explanation, but now the interpretation of the B-level film is broader. Most of Stephen King’s films are B-rated. The Hong Kong-made films basically belong to the B-level film, even the first episode of Mummy. Both belong to the B-level film. 9 What is a PT station? PT (Private Tracker) download is actually a kind of BT download similar, but there are two obvious improvements: one is private small-scale download, the second is to conduct traffic statistics, determine your permissions according to the download volume. The pt station is a website that uses PT technology. New members of the pt station must be invited through the previous member invitation, and the registration mechanism is effectively controlled to control the number of downloads. At present, domestic online video has undergone fierce competition, and copyright has gradually flowed to websites such as Youku and iQiyi. At the same time, these copyright parties have also increased their efforts to crack down on video downloads. Some time ago, the three major PT stations in China were sealed. As a high-definition movie enthusiast, the biggest support for PT stations is not to talk about these websites in public online places (such as Baidu Post Bar, know). 10 What is a home theater network? Home Theater Network (WeChat: cnhifi) http:// is an influential interactive media website for home theater audio players. Audio-visual equipment enthusiasts must visit the website every day. 24V Power Battery,Lithium Pack Charger,Lithium Battery Technology,Lithium Polymere Battery Sichuan Liwang New Energy Technology Co. , https://www.myliwang.com