What is the difference between DTV and HDTV?
Digital Television allows broadcasters to put more data into their signal. As an example, an analog signal requiring 6 megahertz (MHz) will require fewer MHz with digital television. As a result, a broadcaster could use the additional space gained by digital transmission to transmit four simultaneous signals in standard definition (SDTV). High definition adheres to a standard of digital television transmission denoting that the sound and images are of a higher quality, taking advantage of the additional bandwidth. Digital broadcasters are not required to broadcast in this enhanced standard, but it is likely that many will broadcast in HDTV. Remember that all HDTV is broadcast in DTV, but not all DTV is HDTV. HDTV is high-definition television, a television picture format made possible by digital broadcasting. HDTV offers viewers high-quality pictures and Dolby Digital surround sound. HDTV uses the same amount of bandwidth (6 megahertz) as used in the current analog system, but HDTV can
The terms “Digital Television” (DTV) and “High Definition Television” (HDTV) are often used interchangeably, but they are NOT the same thing. Digital Television refers to a TV signal that is transmitted digitally as opposed to an analog signal. Digital Television can be broadcast in several different formats, as seen in the table below. Of these formats, two are considered to be “high definition”. The term high definition implies that the resolution of the digital television signal is very high. For example, the 1080i standard is considered high definition and has a resolution approximately twice that of analog NTSC television. There are 18 “standard” digital television formats. Each one provides a different picture quality. Digital TV formats are named using a number followed by either the letter ‘p’ or ‘i’. Here are some of the more common formats: Format Description 480i Digital version of current television signals. 480p Also known as “standard definition” – has the same detail as
