Those who want to enjoy TV pictures sharper, relies on High Definition Television (HDTV). The advantage of HDTV – High Definition Television – is the sharp image. Even with screen sizes of more than one meter, the display remains impressively clear. Appears a conventional TV picture on closer inspection, grainy, you can flatten literally HDTVs nose -. Without the image quality deteriorates “12 Tips for best picture quality of HDTV and NTSC , HDTV offers over the traditional PAL standard, a much higher resolution . TV pictures look sharper at the same viewing distance. PAL is used in interlaced mode (interlaced) 720 horizontal and 576 vertical lines when displaying images. In one second, an image 50 times (50 Hz) is displayed. Per ad are either only the even or the odd lines to be seen. Due to the high speed of the alternating display (refresh rate), the human eye perceives the image as a whole.
HDTV standards provide up to five times higher resolution than PAL. But even with HDTV formats, there are differences. Three HDTV standards with 720p (1280×720 pixels), 1080i and 1080p (1920×1080 pixels each) have established three HDTV standards. The numbers indicate how many vertical lines in a high-resolution image is composed. The suffix “i” indicates interlace method, which is also used for PAL. “P”, however, stands for “progressive scan”. This progressive scan transfer all the pictures – there are always displayed on all lines. The advantage: no line flicker, as seen, for example tickers for stock prices. “Buyer’s Guide: Six Questions for optimal TV As obtained in the transmission of frames a larger amount of data, high costs for the television networks. Therefore, HDTV fans will have to be satisfied with until further transfers in the interlace mode.
Seal
When buying a HD TV, pay attention to the label “HD ready”. Of the International Electronics Association “EICTA” imported default determines which technical satisfy conditions a TV needs to be referred to as “HD-ready”:
• The native resolution (actual number of pixels) of an “HD ready” device must be at least 720 lines and the widescreen 16:9 format. offer
• In addition to an analog component (YPbPr / YUV), a DVI or HDMI port is needed, the copy protection HDCP support.
• The HD video formats 720p and 1080i (with a refresh rate of 50 and 60Hz) must be supported.
Watching and recording
For the reception of TV programs in HD – quality you need a special digital HDTV receiver (receiver). These so-called set-top boxes to receive signals via satellite (DVB-S2) or via digital cable television (DVB-C). The connections should the encryption process HDCP support. This is not the case, the video signal can be best transmitted in PAL quality.
Recording in HD-quality
Recording of HDTV was not initially possible. Since late 2007, but there are some HDTV receiver with built-in hard drive and televisions, which have both integrated HDTV tuner and hard disk recorders – such as the LCD TV Technisat HDTV 32 . In addition, offer HDTV receivers, such as the HD 1900 LogiSat PVRready II the opportunity to have an external hard drive for recording high-definition TV to be connected.