Hd Television
HIGH DEFINITION TELEVISION
High Definition Television (HDTV) is a digital broadcast signal that delivers a wide-screen, high resolution picture with six channels of digital sound.
High-definition television (or HDTV, or just HD) also refers to video having resolution substantially higher than traditional television systems (standard-definition TV, or SDTV, or SD). HD has one or two million pixels per frame; roughly five times that of SD. Early HDTV broadcasting used analog techniques, but today HDTV is digitally broadcast using video compression.
High-definition video or HD video describes any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1,280×720 pixels (720p) or 1,920×1,080 pixels (1080i/1080p). This article discusses the general concepts of high-definition video, as opposed to its specific applications in television broadcast (HDTV), video recording formats (HDCAM, HDCAM-SR, DVCPRO HD, D5 HD, AVC-Intra, XDCAM HD, HDV and AVCHD), the optical disc delivery system Blu-ray Disc and the video tape format D-VHS.
HDTVs have the ability to play both television programming and Blu-Ray discs in crystal-clear high definition; they are being used by more people.
HDTV SCREEN FORMATS
HDTV provides a much wider screen than conventional television. Because, the viewing area format is similar to a movie theatre screen, the left and right edges of movie presentations don 't need to be chopped off. The HDTV wide screen format provides a more intense viewing experience by taking full advantage of the actual human field of vision.
The dimension of a television screen is referred to as the aspect ratio. The HDTV television format uses an aspect ratio of 16:9. By comparison, the aspect ratio used by conventional television is almost square (4:3 ratio).
While most theatrical movies have used the wide screen format for years, most television programs (until now) have been produced using the old 4:3
High Definition Television (HDTV) is a digital broadcast signal that delivers a wide-screen, high resolution picture with six channels of digital sound.
High-definition television (or HDTV, or just HD) also refers to video having resolution substantially higher than traditional television systems (standard-definition TV, or SDTV, or SD). HD has one or two million pixels per frame; roughly five times that of SD. Early HDTV broadcasting used analog techniques, but today HDTV is digitally broadcast using video compression.
High-definition video or HD video describes any video system of higher resolution than standard-definition (SD) video, and most commonly involves display resolutions of 1,280×720 pixels (720p) or 1,920×1,080 pixels (1080i/1080p). This article discusses the general concepts of high-definition video, as opposed to its specific applications in television broadcast (HDTV), video recording formats (HDCAM, HDCAM-SR, DVCPRO HD, D5 HD, AVC-Intra, XDCAM HD, HDV and AVCHD), the optical disc delivery system Blu-ray Disc and the video tape format D-VHS.
HDTVs have the ability to play both television programming and Blu-Ray discs in crystal-clear high definition; they are being used by more people.
HDTV SCREEN FORMATS
HDTV provides a much wider screen than conventional television. Because, the viewing area format is similar to a movie theatre screen, the left and right edges of movie presentations don 't need to be chopped off. The HDTV wide screen format provides a more intense viewing experience by taking full advantage of the actual human field of vision.
The dimension of a television screen is referred to as the aspect ratio. The HDTV television format uses an aspect ratio of 16:9. By comparison, the aspect ratio used by conventional television is almost square (4:3 ratio).
While most theatrical movies have used the wide screen format for years, most television programs (until now) have been produced using the old 4:3
References: • Penley, Bill and Jonathan Penley, “HDTV History and properties-an Introduction” 2002. • Television Engineering Handbook, Benson Rev Ed. Mc Graw Hill ISBN:0-07-004788-X • Andrews E.L. and J Brinkley, “The Fight for Digital TV’s future”. New York Times (New York), January 22, 1995. • Benson K Blair and Donald G Fink. HDTV-advanced television for the 1990s. New York: Intertext Publications: Mc Graw Hill Pub. Co., 1991. • Video Demystified, K. Jack (Brooktree’s Guru) Hightext, Brooktree. ISBN:1-878707-09-4 • http://www.wikipedia.com/hdtv • http://www.ehow.com/facts_5575403_difference-between-sdtv-hdtv.html • http://www.ehow.com/how_6941842_do-define-hd-cameras_.html