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23, in each frame. This is bi-phase encoded using a clock frequency of 5 MHz. In total, 14 data bits are available, in
4 groups. Group 1 contains the codes for the received format.
The mode chosen is defined by the following table. In effect the default mode is full screen.
The table below gives a summary of the FORMAT modes available (for WP895 and WP895F), and their given
properties.
Format
Name(OSD)
4:3
14:9
ZOOM 14:9
ZOOM 16:9
PANORAMA
5-4-6 EXTERNAL source control logic
Zoom factor – TV with
16:9 CRT
Vertical
Horizontal
100%
75%
114%
87%
114%
100%
133%
100%
100%
100%
Description
Picture is centred with
black bars at the left
and right hand side of
the display
Picture is centred with
black bars at the left
and right hand side of
the display
Picture is displayed
filling the full width of the
screen by incorporating
a small horizontal
geometrical error
(typically 8% linear)
Picture is displayed
filling the full screen
(width and height)
Picture is displayed
filling the full screen
(width and height)
- 49 -
Application
Standard 4/3 picture with
576 active lines
14:9 picture – letter box
format with 504 active
lines
14:9 picture – letter box
format with 504 active
lines
16:9 picture – letter box
format with 430 active
lines
Used to fit a picture with
4:3 format on a 16:9
screen by stretching the
picture geometry at the
borders.
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