Sony DVD Rom/DVD Video manual Safe Area, Colour Depth, Range

2. DVD-Video

2.3.13Safe Area

DVD Menus should be designed in accordance to standard Title Safe and TV Safe areas. All graphic elements of significance should be within TV Safe and all text should be within Title Safe. TV Safe is a 5% margin from the edges of the video image and Title Safe is 10% from the edges.

These areas should be applicable in the last stage shown above. This translates to the following margins for PAL and NTSC:

PAL NTSC

384

Margins in Pixels for TV and Title Safe areas:

	Edge	TV Safe Margin	Title Safe Margin
PAL	Left / Right Each	36 Pixels	72 Pixels
	Top / Bottom Each	28 Pixels	57 Pixels
NTSC	Left / Right Each	36 Pixels	72 Pixels
	Top / Bottom Each	24 Pixels	48 Pixels

For Menus in 16:9 format please contact Sony DVD Center Europe

2.3.14Colour Depth

A 24bit colour palette can be used, as long as NTSC/PAL colour limits are not exceeded. CCIR-601 (or ITU-R 601 as it is known now) recommends that the nominal range for RGB signals should be 16-235 on a scale of 0-255. The extra headroom from 0-15 and 236-255 is occasionally needed to accommodate overshoot and other out of bounds signals that can be generated by analog video processing.

A good reference for colours that work well with NTSC and PAL colour systems are their 75% Colour Bar test signals. For conservative design, the RGB values of these Colour Bars can be used as the upper/lower limits for their respec- tive colours.

PAL / NTSC 75 % colour bar RGB values (Gamma Corrected) :

		White	Yellow	Cyan	Green Magenta		Red	Blue	Black
	Range
		PAL / NTSC
R	0-255
G	0-255	255 / 191	191	0	0	191	191	0	0
B	0-255	255 / 191	191	191	191	0	0	191	0
		255 / 191	0	191	191	191	0	0	0

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