High-definition television (HDTV) provides a resolution that is substantially higher than that of standard-definition television.
HDTV may be transmitted in various formats:
- 1080p - 1920×1080p: 2,073,600 pixels (approximately 2.1 megapixels) per frame
- 1080i - typically either:
- 1920×1080i: 1,036,800 pixels (approximately 1 megapixel) per field or 2,073,600 pixels (approximately 2.1 megapixels) per frame
- 1440×1080i: 777,600 pixels (approximately 0.8 megapixels) per field or 1,555,200 pixels (approximately 1.6 megapixels) per frame
- 720p - 1280×720p: 921,600 pixels (approximately 0.9 megapixels) per frame
The letter "p" here stands for progressive scan while "i" indicates interlaced.
When transmitted at two megapixels per frame, HDTV provides about five times as many pixels as SD (standard-definition television).
Read more about High-definition Television: History of High-definition Television, Inaugural HDTV Broadcast in The United States, European HDTV Broadcasts, Notation, Contemporary Systems, Recording and Compression
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“It is not heroin or cocaine that makes one an addict, it is the need to escape from a harsh reality. There are more television addicts, more baseball and football addicts, more movie addicts, and certainly more alcohol addicts in this country than there are narcotics addicts.”
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