Digital high-definition television sets of types: digital high-definition television (HDTV), can be divided into the "machine" and "split". ▲ "Machine" is a TV monitor built-in set-top box, full-function (source decoded, channel decoding, conditional access). At present, China digital TV standard has not yet been issued, so the market is not such a digital high-definition television; ▲ "split" is without a set-top box for digital TV display, at present, the market for high-end television sets (plasma, LCD and rear-projection TV) are mostly belong to separate machines, users need to purchase a set-top box to watch digital high-definition television. Meet the national standards for digital high-definition TV set can receive 1., demodulation by high definition signal modulated RF signal; 2. image definition, must be horizontal and vertical direction is greater than or equal to 720 TV line; 3. able to decode and display 1920 × 1080i/50 Hz or higher image format of the video signal; 4. image shows the aspect ratio of 16: 9; 5. to be able to input, processing and display of other image formats such as 720 × 576; 6. to be able to decode and output digital TV sound. Current TV market of high-end TV can be watched digital high-definition television? current market most of the TV can be connected set-top box to watch digital SDTV after. But you want to watch HDTV, the receive terminal i.e. television, at least must have national standards referred to above. According to the test, the current market and all major brands of LCD TV, plasma TV basic comply with the above conditions, achieved the forthcoming high definition digital TV standards (the year of the digital TV terminal product standards (draft) will be completed next year legislated), and other products, like most digital TVs, progressive scan TVs, rear projection TV, and other products, because it does not meet the above conditions, they connected set-top box after watching standard definition television, there is no problem, but was unable to watch high-definition television. High-end television at present can be divided into three broad categories, namely, liquid crystal (LCD) and plasma (PDP) TVs, rear projection TV (PJTV) three, of which the rear-projection TV and LCD, DLP and LCOS three technology of rear projection TV.
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