High-definition projector problem has become a piece of original high-definition projector universal important factors
«Ò» ¡ ¢ high-definition projector is facing an embarrassing
We all know, the current main digital video can be divided into DTV, SDTV and HDTV three grades. DTV/LDTV (200-300 lines) that the general definition television, mainly corresponding existing VCD resolution level and analog TV. SDTV (500-600 line) or standard definition television, mainly corresponding existing TV resolution level, its image quality level for the Studio, 480i and 480P digital signal is considered a standard definition TV (SDTV). Two DTV image scanning rate of 1080 (1080i/1080P) and 720 progressive (720P) is considered a HDTV high definition television, HDTV, high definition of the main problems it supports 1280 x 720 progressive scan, 1920 * 1080 interlaced, 1920 × 1080 progressive scan three display modes.
Traditional analog TV solution: company of just 300 line, HDTV is the equivalent of traditional analog TV solution: company of three or four times the image quality. But high-definition projector at application time has to face this dilemma, we close most of the resolution of the video source is not high, and traditional analog TV's solution: company of just 300 line, VCD resolution however 340 × 255, DVD and standard definition digital TV resolution is 720 × 480 (NTSC and PAL is 720 x 576), of which a considerable part of the DVD to 576 × 480 screen resolution, this certainly does not meet the basic needs of the high definition projection, i.e. 720P (1280 × 720) and 1080I (1920 × 1080).
Various supports high-definition playback times line DVDIPDVD abound
And VCD/DVD video resolution-these are our current day-to-day application of the absolute mainstream, high-definition projector in the face of these video is certainly not perfect point to appear must be carried out by the projector, the pixel transform NTSC or PAL SD signals converted to 1280 × 720 or 1920 × 1080 HD signal for display, this would lead to a decline in picture quality. At this point, the number of signal level scan line and even SVGA projector 480P precisely and this resolution is a match, you do not need to make a pixel transform, but you can get the best picture quality.
This results in high-definition projector at play SDTV programs or ordinary when its effect on TV and never better than cheaper 480P and even SVGA projector more embarrassing, many users therefore suspect — we spend more money to buy these HD machine to? so if you want to make the best use of high-definition projector, as of the performance of high-definition projector high-definition video source is found. So, you want to watch high-definition video need to have high-definition projector, you also have the following condition: ① to have high-definition video content. ② to have high-definition video playback system.
Second, the maximum pain, high-definition film sources where seeking
There is a high definition projector and playback devices, high-definition film sources and where can I find?
HDTV video source
Domestic places where conditions are available through the HDTV television system directly watch 720/1080I high-definition television, such as CCTV HD television channel is the first truly high-definition channels. Channel to film program, all broadcasting programmes from shooting to post-production, to receive satellite transmission, landing shall ensure that the "true HD-quality". 1 January 2006, the program has been broadcast from 15 hours to 18 hours a day, 7-point to the end of the day 1 point. High-definition television channel program is divided into seven classes, covering television drama, film, television, film, music, fashion shows, sports and documentaries. High-definition program reserves up to 3000 hours, 800 hours a year. Nationwide including Beijing such as four municipalities, more than 50 city cable TV network to play the high-definition television. The city of consumers to purchase high-definition televisions and set-top boxes, each month and then pay the program fee is $ 120, impressive to see high-definition digital TV.
CCTV HD
In addition, after Shanghai Gubei area for nearly three months of trial operation, Shanghai interaction television limited by 1 January 2006 announced that it officially opened its new vision "of the" high-definition television channels.
Of course, also available via HD satellite set-top boxes (HD-STB/DVB-S), high definition terrestrial set-top boxes (HD-STB/DVB-T) to directly watch satellite broadcast/transmission of HDTV, the price of such products is generally around $ 500-1500.
To a certain brand of HD satellite set-top boxes, for example, it is consistent with standards of MPEG-2 DVB-S/receiver that supports novel-tongfang/love Hadid (Irdeto) conditional access, meet MPEG-2 high standard definition decoding requirements. At the same time, it is also a meet Dolby AC-3 MPEG-1 audio decoding standards or with Dolby AC-3 two-channel mixed output functions of receiver. HDTV satellite STB's greatest advantage is you can make full HD TV video and audio decoding, its resolution up to 1920 × 1080 video format can be
16: 9 or 4: 3. Its channel decoding standards meet DVB-S QPSK modulation for demodulating; support for 1/2, 2/3, 3/4, 5/6, 7/8 rate of forward error correction code rate, compatible with 2-45MS/s signal. In addition to the regular 75 Ω RF input, output, s-video Terminal, composite video interface, video component interfaces, RS-232 upgrade interface, VGA PC interface, digital audio interface, and so on, there are high-definition digital TV must have an HDMI connector. In addition to being able to receive satellite HDTV channels, you can receive the satellite on a standard TV, could very well meet the high definition projector and other high definition video source to the display device.Satellite set-top box is watching high-definition of a good partner
① use computer display or SDTV projector to view, use a VGA connector; ② the use of high-definition projector or flat panel TV watching, then as long as the set-top box with HDMI interface with special cables and flat panel TV with an HDMI connector plugged in, you can use ordinary CRT; ③ or ordinary projectors to watch TV, set-top box's composite video terminal or S Terminal and CRT TV's corresponding port connection.
High-definition disc
Direct purchase of high-definition disc is a good choice. But Blu-ray disc prices hinder popular, current Blu-ray disc price approximately 100-250 Yuan/Zhang, such as the United States original edition Blu-ray DVD "Tomb Raider Lara Croft-Tomb Raider" domestic prices in the United States 220 Yuan, A district of Blu-ray DVD original "instinct 2: Basic Instinct 2 fatal temptation" domestic price at around $ 120-150.
The domestic market more and more high definition film sources
While HD DVD discs are expensive and many, such as HD DVD "Tiger tank longwei 3" 720P/AVI disc market in 40 Yuan, United States original HD DVD "Casablanca" turn the dials market over about $ 30. But genuine domestic HD disc price EVD is generally within 10-20 Yuan/Zhang Yuan. Everyone can use.
Of course, also available in the local market, generation lithography or through Internet network generation lithography method to obtain high-definition discs. For example, compare the famous sold high-definition DVD's website (user identification, we introduce such Web sites does not mean that we endorse its method, just give the reader an understanding of the way), its high-definition disc resource.the, price is not very expensive, their burning HDTV high definition disc prices are as follows: single burn 50 following 6.5/P, express fee of $ 15 million ($ 8-Zhejiang-Shanghai area); where a single burn 50P above, $ 6, express costs/P 20 Yuan ($ 15-Zhejiang-Shanghai area); the use of 3 burn disc DVD-R serve you are Mitsubishi 16X, Ritek 8X, Ritek 8X printable discs, so that users can select when placing an order, if you want to print the disc surface, you can select the Ritek 8X printable discs.
Network download
For computer users over a network, BT or FTP download, but also gets high definition film sources. BT principle there is no need to author fine describes it, BT download is a multipoint download source code and open P2P software, using multipoint-to-multipoint transmission principle, suitable for downloading movies, etc. larger files. Use BT download and use the traditional HTTP site or FTP site to download, along with the download user increases download speed will be faster. Based on this feature, use the BT download the latest movies, software, etc. in the speed of the great advantages. BT download software is very easy to use, the software installed, simply find it online and want to download the file to the appropriate seed file (* .torrrent), click the steps as the system prompts to start the download.
Very nice bit Elf
Common BT download software have bit Elf (BitSpirit), BitComet, BitTorrent, BT BT engine, greed, and so on, these software are built-in BT search functionality or integrate the BT website, you can easily download these resources.
Of course, eMule (eDonkey, eMule) it is also a better P2P software, its second generation P2P no centres, purification characters of distributed systems, but it is no longer a simple point-to-point communication, which is more efficient, more complex network communication. Chinese version of eMule is VeryCD is the most widely used P2P software, monthly downloads over 3 million times, while at the same time online more than 400 million users. Every popular resource, VeryCD users to have the first opportunity to speed downloads.
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