CXA2095S
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 10H 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 Sony type 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 4:3 images in a 16:9 aspect ratio. 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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SONY [ SONY CORPORATION ]
