Why is the video in the preview af lower quality than the original video?

I have a question about the quality of the video seen in the preview. This is not as good as the original and also not as good as the original video seen with fe mediaplayer.
I already read some similar discussions and I have tried some things:
Starting a new project with other settings (PAL HD 1080i, 25fps), this does not help.
Rendering the video if necessary, this does also not help.
Some information:
The video's are from a PanasonicHDC-SDT750 full HD camera. Setting 1920HA.
Output files are MPEG imagesize 1920x1080, 25 fps, 48 kHz
Computer: Inte(R)l core (TM) i7-3632QM CPU 2.20 GHz 8 Gb RAM
AMD High definition audio devise
I hope this information is enough to help me, any help is surely appreciated.

carla68
Thanks for the follow up. Let us go through the check list to make sure what you are seeing should be the best possible
1. Project preset....Based on the Panasonic HA setting, the camera should be expected to be recording 1080i (in your case, 1920 x 1080 @25 interlaced frames per second). Either you (manually) or the project (automatically) should be setting the project preset to match those video properties, using
PAL
AVCHD
Full 1080i25
When you import that source into the Expert workspace and drag it to the Timeline, there should be no colored line over its content indicating that the file needs to be Timeline rendered to get the best possible preview. In fact, with no colored line, if you press Render, you will get file playback and not Timeline render.
Are we OK on this so far.
2. Right click the Edit area monitor, select Playback Quality, and then compare the set for Automatic versus Highest.
3. Go to Edit Menu/Preferences/General and the option there
"Timeline render quality (valid for HD projects)" and determine if it is set for "High quality, Slow Speed". If not, set it to that choice.
4. The bitrate for your source is 17 Mbps. If you have exported
Publish+Share
Computer
MPEG2
with Presets = MPEG2 1920 x 1080i25 High Quality
you should be OK bitrate wise since the defaults for the preset are
Minimum 18 Mbps
Target 25 Mbps
Maximum 30 Mbps
Have you looked at the export of
Publish+Share
Computer
AVCHD
with Presets = MP4 - H.264 1920 x 1080p25?
5. Is your computer's video card/graphics card driver version up to date according to the web site of the manufacturer of the card?
Please review and consider the above.
Thank you.
ATR

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