720i is an erroneous term found in numerous sources and publications. Typically it is a typo in which the author is referring to the 720p HDTV (high-definition television) format. However, in some cases it is incorrectly presented as an actual alternative format to 720p.[1] In fact, no proposed or existing broadcast standard permits 720 interlaced lines in a video frame at any frame rate.[2]
While such a system is hypothetically possible, it would likely look little better than native 480p, and would consume more bandwidth since interlaced signals cannot be compressed as efficiently as progressive.
See also
- 720p, 576p, 480p
- High-definition television (HDTV)
Notes
- ^ Briere, Daniel; Patrick Hurley (2006). HDTV for Dummies. For Dummies. p. 13. http://books.google.com/books?id=Jb62Hkrj0oYC&printsec=frontcover&dq=hdtv+for+dummies&client=firefox-a.
- ^ "ATSC Standard: Video System Characteristics of AVC in the ATSC Digital Television System". 2008-07-29. http://www.atsc.org/standards/a_72_part_1.pdf. Retrieved 2008-10-17.
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