If an HDTV can receive this information digitally, it also doesn't have to spend time or processing power converting the signal from an analog format. This means that HDTVs need more data and need it a lot faster than standard-definition TVs do. Often, HDTVs can display more colors than older sets. So, compared to standard TVs, HDTVs have a wider screen, more pixels and a faster refresh rate. Finally, older TVs relied on analog signals, which travel as a constantly varying electrical current. The picture was interlaced - each piece of the moving image was really half a picture, but the pictures changed quickly enough that the human brain didn't really notice. Its resolution, or the number of dots that make up the picture on the screen, was about 704 x 480 pixels. The picture was roughly square - its aspect ratio was 4:3. īefore the development of high-definition televisions, most TVs displayed pictures in what is now known as standard definition. It's a set of rules for allowing high-definition electronic devices to communicate. But HDMI is more than a port on the back of a TV (and the often expensive cable that fits inside). ![]() ![]() It can seem like just one of many connections on televisions or home-theater receivers. If you've shopped for an HDTV, a PlayStation 3, or an HD-DVD or Blu-ray player, you've probably heard about HDMI. ![]() HDTV Image Gallery HDMI is more than a port on the back of a TV and the often expensive cable that fits inside.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |