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Pioneer KRP-500

 Performance: Video Processing of Standard Signals

Pioneer

Pioneer KRP-500

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Video Processing of Standard Signals

 

Video Processing of Standard Signals

Pioneer's plasma TVs have traditionally distinguished themselves with excellent video processing. The KRP-500 puts in a fine performance, especially regarding de-interlacing.

 

Background Info

The challenges of de-interlacing.

During de-interlacing, the TV has to compile an accurate progressive (or "full") picture from the input's interlaced ("half") pictures. These can come from the TV tuner or other PAL/NTSC sources (Video, S-Video, RGB, YUV-576i/480i, HDMI-576i/480i).

If there are errors during this process, stair-step effects will appear on fine, diagonal lines. Image details may also flicker or show frayed, comb-like edges.

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Pioneer's KRP-500 accurately handled both our test sequences, found in Chapter 5 of "Six Days, Seven Nights" (symptom: beach loungers showing stair-step effects), and in Chapter 8 of "Space Cowboys" (symptom: a flickering picket fence). If the set still shows picture errors, check that the "PureCinema" function is definitely set to 'Standard' in the picture menu's "Pro Adjust" page.

 

High-quality Video Electronics:
As testament to the KRP-500's high-quality video electronics, the TV derives an accurate and detailed picture from each video input. Some variation in fine-detail reproduction exists, but this depends on which transmission format is used.
Regardless of your TV's signal-processing quality, you should always use the highest quality input in terms of its video technology. Otherwise, you are just throwing quality away.


Pioneer KRP 500 Overscan

 

 

available video interfaces

 

It takes eagle eyes to pick it up, but there is one mini-error in 576i/p playback: The KRP-500 magnifies the input picture slightly (known as "overscan"), leaving a small section undisplayed. Almost all modern TVs do it, but this developer's affliction actually stems from the VHS-recorder era, which saw errors at the picture's edge. Ironically, modern picture sources, such as digital satellite TV or DVD players, have long been free of this problem.

 

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If your DVD player can accurately output a picture in 1080i or 1080p resolution, you should use this option.

You can switch off overscan on the KRP-500 for both of these resolutions using the "Dot for Dot" picture format. This will allow you to see the entire picture, which looks a bit finer than signals input at 576 lines.

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The KRP-500's integrated TV tuner produces an attractive, accurate picture. It can handle analog TV signals as well as digital terrestrial (DVB-T) and digital satellite TV (DVB-S) producing a tidy, error-free picture maximizing each signal type's sharpness. The best TV picture quality comes with satellite reception - because of the channel's higher bit rates - we were delighted by detail in both standard and HDTV programs.

 

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If you notice slight judder on news-tickers, on CNN or NBC for example, bring up the options menu and set "Drive Mode" to 2. In this setting, the display uses 100 Hertz technology, which makes scrolling texts look less choppy than in 75 Hertz playback.

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4:3 Picture Format:
One of the KRP-500's few shortcomings is the 4:3 picture format. Unlike Panasonic plasma TVs, for example, the sidebars are gray when they should be black. Pioneer does this to prevent the screen's light-producing phosphors from aging unevenly - otherwise, the 4:3 format would be superimposed on widescreen pictures. Still, these gray bars really got the testers backs up: Dark pictures in particular look unattractive and lose some subjective contrast.

 

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You can outwit gray sidebars, such as those on the Pioneer, with some set-top boxes and DVD players. The prerequisite for this is that the input device offers a so-called "window box" or "centered" picture format or can automatically scale its output to suit a 16:9-format TV.

Here, the box adds black bars to the sides of the picture, so that the output signal already fills the 16:9 aspect ratio. You then select the Pioneer's "full" or "Dot for Dot" image format.

In practice, it actually takes a very long time for modern plasma TVs to develop visible screen-dimming effects. Regardless, home-theater use is mostly watching movies in wide-screen format.

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Pioneer KRP 500 Dot by dot

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