HDTV: High-definition televisionis a digital television broadcasting system with higher resolution than the traditional television systems. It Offers crystal-clear picture and sound.
How to get HD signals?
There are three basic ways to receive high-definition programs. Once you know what type(s) of HDTV signals are available, you'll have a clear idea of what equipment you need to watch them.
1. Over-the-air broadcasts:
Digital TV broadcasts are currently being transmitted by over 1500 local stations, so you can receive them with a standard UHF antenna.
To watch HDTV over-the air broadcast you need:
- HD-compatible TV
- HDTV (ATSC) tuner — separate unit or built into TV
- indoor or outdoor UHF or UHF/VHF antenna
- local HDTV broadcasts
2. Cable HDTV: Cable TV providers now offer the option of HDTV service to about 90% of subscribers. If your cable provider does offer HDTV, you'll probably need to upgrade your
cable box to an HDTV-capable model.
To watch HDTV over Cable you need:
- HD-compatible TV
- HD-compatible cable box. or TV with built-in digital cable tuner.
- HD programming.
3. Digital satellite TV: Areas getting clear view of the southern sky, can receive HDTV programs via satellite.
To watch HDTV over satellite you need:
- HD-compatible TV
- HD-compatible satellite receiver
- HD-compatible satellite dish
- HD programming
Advantages of HDTV :
High-definition television (HDTV) yields a better-quality image than standard television does, because it has a greater number of lines of resolution. The visual information is some 2-5 times sharper because the gaps between the scan lines are narrower or invisible to the naked eye.
Disadvantages of HDTV :
In practice, the best possible HD quality is not usually achieved. The main problem is that many operators do not follow HDTV specifications fully. They may use slower bitrates or lower resolution to pack more channels within the limited bandwidth, reducing video quality.The operators may use a format that is different from the original programming, introducing generation loss artifacts in the process of re-encoding. Also, image quality may be lost if the television is not properly connected to the input device or not properly configured for the input's optimal performance, which may be difficult because of customer confusion regarding connections.
Samsung HDTV
Panasonic HDTV
Hitachi HDTV
Toshiba HDTV
Mitsubishi HDTV