CXA2000 datasheet(38/48 Pages) SONY

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CXA2000Q

4) 16:9 CRT subtitle-in mode

When CinemaScope size images which have black borders at the top and bottom of the picture are merely

enlarged with the zoom mode in 3) above, subtitles present in the black borders may be lost. Therefore, this

mode is used to super-compress only the subtitle part and reproduce it on the display.

Add the LO-VLIN adjustment to the zoom mode settings for the register settings.

V-ASPECT = 2Fh

V-SCROLL = 1Fh or user control

LO-VLIN

= Adjustment value

The LO-VLIN register causes only the linearity at the bottom of the picture to deteriorate. Therefore, UP-VLIN

should also be adjusted if the top and bottom of the picture are to be made symmetrical. Since the picture is

compressed vertically, the number of scanning lines exceeds 430 lines.

5) 16:9 CRT V compression mode

This mode is used to reproduce two 4:3 video displays such as for PandP. The V size must be compressed to

67% in order to reproduce two displays on a 16:9 CRT without distortion using 480 scanning lines, and this can

be set by JMPSW. Compression is performed after the AKB reference pulse, so the reference pulse remains in

the overscan position. The V blanking width after the reference pulse becomes larger than normal and can be

varied by the VBLKW register. During this mode, the bottom V blanking width is also expanded to 3H wider

than normal so that the bottom of the picture is not overscanned.

16:9 CRT standard values are used with only the JMPSW setting changed for the register settings.

JMPSW = 1

6) 16:9 CRT wide zoom mode

This mode reproduces 4:3 video software naturally on wide displays by enlarging 4:3 images without other

modification and compressing the parts of the image which protrude from the picture into the top and bottom

parts of the picture. The display enlargement ratio is controlled by V-ASPECT, and the compression ratios at

the top and bottom of the picture are controlled by UP-VLIN and LO-VLIN.

Adjust the following three registers with respect to the 16:9 CRT standard values for the register settings.

V-ASPECT = Adjustment value

UP-VLIN

= Adjustment value

LO-VLIN

= Adjustment value

7) 4:3 CRT normal mode

This is the standard mode for 4:3 CRTs.

The register settings are the 4:3 CRT standard values.

8) 4:3 CRT V compression mode

This mode is used to reproduce M-N converter output consisting of 16:9 images expanded to a 4:3 aspect ratio

and other squeezed signals without distortion on a 4:3 CRT. The V size must be compressed to 75% in order

to reproduce a 4:3 squeezed signal at a 16:9 aspect ratio without any distortion. Compressing the V size with

the JMPSW register used in mode 5) above, compresses the V size to 67%. Therefore, V-ASPECT is set to

enlarge the V size by 8%. AKB reference pulse handling and V blanking are the same as for mode 5) above.

4:3 CRT standard values are used with the V-ASPECT and JMPSW settings changed for the register settings.

V-ASPECT = 3Fh

JMPSW

= 1

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