Picture Size And Resolution - Hitachi 26LD5550U User Manual

Picture size and resolution

Resolution and picture quality
Broadcast wide screen fi lms in different resolutions. The following table shows the resolution options for
wide screen fi lm broadcast media.
Resolution of the wide
screen signal
432i x 704 (Letterbox)
576i x 704 (anamorphic)
720 x 1280 (HD)
1080i x 1920 (HD)
Best image quality results when the inputted resolution received corresponds with the resolution of
the used TV appliance. The 26LD5550U has a resolution of 1366x768, its picture format therefore
corresponds with 16:9. As a result best image quality results with a picture signal of 1280x720 or higher.
The low resolution of analogue cable TV is not recommendable for HD-ready appliances resulting in
poorest visual image quality. Analogue cable TV is however completely suffi cient for analogue tube TV
appliances.
Picture quality and black bars
Wide screen fi lms come in different formats. The format is the
relationship between the width and height of the picture. For example,
with a 16:9 fi lm the width to height ratio is 16:9 or 1.78:1. Only 16:9 fi lms
can fi ll a HD-ready screen without black bars. Therefore, black bars are
always visible when a format other than 16:9 is received. E.g. 4:3, A 4:3
displays vertical black bars to the right and left.
If a 4:3 picture is increased to 16:9 format then it either appears
distorted (see illustration) or some parts of the picture are cropped off at
the top and the bottom. This is completely normal and is not a fault in
the wide screen TV.
Super Cinemascope fi lms are wider than 16:9 fi lms. They are in the
format 2.4:1 or 22:9, for example. This is clearly wider than16:9.
Therefore, Super Cinemascope fi lms display black bars at the top and
bottom on any HD-ready TV set. The 26LD5550U cannot remove the
black bars from Super Cinemascope fi lms.
Picture format and resolution
There is no connection between the picture format and the resolution received. For example, the Super
Cinemascope format can be received in all resolutions, even in the HD resolution1080ix1920. For HDTV
reception too an HD-ready set may display black bars at the top and bottom.
Broadcast media
Analogue Digital
cable TV cable TV
Yes Yes
No Yes
No No
No No
DVB-T Satellite DVD
(DVB-S)
Yes Yes Yes
Yes Yes Yes
No No No
No No No
HDTV BlueRay-
Satellite Disc
(DVB-S2)
Yes No
Yes No
Yes Yes
Yes Yes
4:3 picture 1:1 on
16:9 screen
4:3 picture zoomed on
16:9 screen
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