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High-definition television - Wikipedia, the free encyclopedia |
 | | While a number of high-definition television standards have been proposed or implemented on a limited basis, the current HDTV standards are defined as 1080 active interlaced or progressive lines, or 720 progressive lines, using a 16 : 9 aspect ratio in ITU-R BT.709. |
| | The native bitrate of HDTV formats cannot be supported by 6-8MHz standard-definition television channels for over-the-air broadcast and consumer distribution media, hence the widespread use of compression in consumer applications. |
| | SMPTE 292M interconnects are generally unavailable in consumer equipment, partially due to the expense involved in supporting this format, and partially because consumer electronics manufacturers are required (typically by licensing agreements) to provide encrypted digital outputs on consumer video equipment, for fear that this would aggravate the issue of video piracy. |
| en.wikipedia.org /wiki/HDTV (4191 words) |
