Rec. 709
ITU-R Recommendation BT.709, more commonly known by the abbreviations Rec. 709 or BT.709, standardizes the format of high-definition television, having 16:9 (widescreen) aspect ratio. The first edition of the standard was approved in 1990.
Technical details
Pixel count
Rec. 709 refers to HDTV systems having roughly two million luma samples per frame. Rec. 709 has two parts:
Part 2 codifies current and prospective 1080i and 1080p systems with square sampling. In an attempt to unify 1080-line HDTV standards, part 2 defines a common image format (CIF) with picture parameters independent of the picture rate.
Part 1 codifies what are now referred to as 1035i30 and 1152i25 HDTV systems. The 1035i30 system is now obsolete, having been superseded by 1080i and 1080p square-sampled ("square-pixel") systems. The 1152i25 system was used for experimental equipment in Europe and was never commercially deployed.
Frame rate
Rec. 709 specifies the following picture rates: 60 Hz, 50 Hz, 30 Hz, 25 Hz and 24 Hz. "Fractional" rates having the above values divided by 1.001 are also permitted.
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Beat You To Death
by: GWARI am a throwback to primeval age
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Right now! I will lay you to rest
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If you piss me off I will simply start smashin'
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Why waste my words when my fists are poetic
Beat you down
To the ground
Break your bones
Final blow
And blood will flow
It's clobberin' time!
I hate you I hit you [x7]
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