Measuring Horizontal Resolution - Sony DXC-D30WSL Bedienungsanleitung

Measuring Horizontal Resolution

The number of effective pixels of this camera in
horizontal direction is 980. However, when horizontal
resolution measurement is executed using a 4:3
resolution chart, the results show a horizontal
resolution of approximately 700 TV lines for both 16:9
mode and 4:3 mode as described below.
Horizontal resolution in 16:9 mode
When the horizontal image frame of this camera is
aligned with the width of the 4:3 resolution chart, the
resolution is about 935 TV lines (see Figure A).
However, to measure the resolution of a video camera
precisely, the vertical image frame must be aligned
with the height of the chart. When this is done, the
resolution is approximately 700 (935 × 3/4) TV lines
(see Figure B).
Horizontal resolution in 4:3 mode
In 4:3 mode, frame memory is used to extract the 4:3
area from the 16:9 video signals produced by the WS
CCD, and the 4:3 signals are electronically enlarged.
As a result, the horizontal resolution is approximately
700 TV lines, the same as for 16:9 mode (see Figure
C).
4:3 resolution
chart
16:9 video
Figure A.
4:3 resolution
chart
16:9 video
Figure B.
16:9 video
4:3 video
Figure C.
Horizontal
resolution:
Approx. 935
TV lines
Horizontal
resolution:
Approx. 700
TV lines
Horizontal
resolution:
Approx. 700
TV lines
Horizontal
resolution:
Approx. 700
TV lines
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