REVIEW: BenQ G2411HD Part 15

Unusual: 56 Hertz image playback.

Overall, the BenQ G2411HD delivers a surprisingly good result for an office monitor, with which considerably more expensive models cannot always compare.

Deinterlacing

The BenQ G2411HD is capable of accepting half-frame based material. However, an LCD always works on a full frame basis, so what is known as a deinterlacer must be present, which takes on the conversion of half frames to full frames. Further information on this topic can be found in our report: "Make 1 from 2" – Deinterlacing.

2:2 signals are not recognised on the G2411HD and are scaled up using field scaling …

… as is 3:2 material …

…… and real video material.

The playback of 576i50 and 480i60 is achieved through simple field scaling. Here, each half frame is upscaled, which is expressed in pronounced flickering of lines.

On the other hand, for the playback of 1080i50, correct film mode deinterlacing is used. The image quality is still somewhat better at 1080p25. Thus, the progressive playback should always be preferred.

Scaling

The requirements for the scaling of video material are comparable with those for video gaming.

The series of test pictures is based on an anamorphic video with circles, which should be absolutely rounded if the aspect ratio is observed correctly.

DVD playback via Blu-ray player:

Playback in 576p in output format 16:9; Interpolation via monitor: full screen.

The first setting shows the 16:9 material in full screen format on the 16:9 panel. Therefore, there is no distortion; the circles are displayed correctly. Although the source material is in 16:9 in the second setting, the mechanics on the G2411HD attempt to compress the image, which gives rise to strong distortion.

Playback in 576p in output format "4:3 Letterboxed"; Interpolation via monitor: full screen.

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