Samsung UNB7000 review: Samsung UNB7000

Samsung UNB7000 series
Samsung finally allows firmware updates to be downloaded directly to the TV.

The UNB7000 series offers good connectivity, as long as your AV system doesn't have many analog components. The highlight is four HDMI inputs, arranged vertically along the shallow connection bay on the back of the TV (note that fat cables might not fit the nearly flush sockets very well). You also get two USB inputs, a VGA-style PC input, and a single component-video input that can be converted to accept composite video instead. An RF input for antenna or cable, an optical digital audio jack, and the Ethernet port complete the picture. If you need to connect more than one analog device, you'll need to use a switcher or an AV receiver.

Samsung UNB7000 series
A single component-video-equipped input, which can also accept composite video, comprises the extent of the UNB7000's analog AV input capability.

Samsung UNB7000 series
Four HDMI inputs and a pair of USB ports, one shown here with the included "E-manual" inserted, line up along the side of the connection area.

Performance
In sum, the UNB7000 series delivered a very good picture, but a few flaws prevented it from matching the best models we've tested, including local dimming-equipped LED-based LCDs. Despite its relatively deep black levels, the UNB7000's variable backlight impaired performance in very dark scenes. We also noticed some uniformity issues, primarily in dark scenes as well, that are probably caused by the edge-lit LED system. That said, we really appreciate the set's accurate color and the Custom setting of its dejudder processing.

Our calibration for a dark room involved making a few key changes to the default Movie picture mode. The largest was raising the gamma control from zero to +3, which improved shadow detail significantly and ameliorated some of the worst effects of the variable backlight (see below), but caused overall average gamma to worsen, from 2.25 to about 2.0 (the ideal is 2.2). Gamma was still too dark in near-black areas, and became too bright in brighter ones, but the sacrifice was worth it in our opinion. We also tweaked the grayscale a bit to closer approach the D65 standard, used the great blue-only mode to set color and reduced overall light output significantly from Movie's default of 60 footlamberts to a more comfortable 40.

Check out this post for our complete picture settings and for details on how to use the blue-only mode to set color.

For comparison purposes, we have a good selection of high-end HDTVs on-hand, including the LED-powered Samsung LN46A950 and Sony KDL-55XBR8, the standard Samsung LN52A650 LCD, and a pair of plasmas, the Panasonic TC-46PG10 and our reference Pioneer PRO-111FD. This time, we used "The Day the Earth Stood Still" on Blu-ray for most of our image quality tests.

Black level: Overall, the Samsung UNB7000 didn't do as well in this category as most of the other displays in our comparison. That's mainly because the LEDs along the edges of the display, which we'll refer to as its "backlight" to avoid confusion, fluctuated depending on the overall brightness of the scene. In very dark scenes, the entire backlight, and thus the letterbox bars and shadows, would dim, while in brighter scenes it would become brighter. Other displays do similar things, but on the 7000 series it was more noticeable and affected more than just completely black screens.

In very dark scenes, the UNB7000 delivered a deep shade of black, deeper than any of our comparison sets aside from the Pioneer, to the point of fading completely into darkness between scenes. In brighter scenes its black levels rose slightly--darker still than the A950 and A650, but not as inky as the Pioneer, Sony XBR8 or Panasonic.

The backlight fluctuation caused brighter areas to darken during dark scenes, which was the worst downside to the variable backlight. In the opening credits, for example, the moon and the text such as "Keanu Reeves," as well as the stars in the night sky, all appeared dimmer than on the other displays in our comparison, despite the fact that we had equalized their light output for comparison. The effect was so pronounced that far fewer stars were visible on the UNB7000 than on the other displays, and definitely impaired the contrast ratio and "pop" of the scene.

We also noticed the fluctuation in one of our favorite test scenes from "I Am Legend" when Will Smith locks up his townhouse for the night at the beginning of Chapter 4. At the very beginning of the chapter, the UNB7000's screen goes completely black, then abruptly brighter.

That said, in most dark scenes the backlight was not distracting. A good example is when Smith goes after his dog in the warehouse at the end of Chapter 8; watching this entire 5-minute sequence, which occurs mostly in the dark, it was free of noticeable fluctuations. The same went for the nighttime scene at the beginning of Chapter 3 in "Earth" when Jennifer Connelly approaches the military academy. In both of these scenes, shadow detail and black levels were very good; better than the A650 and generally equal to the other LED-based LCDs, albeit not to the two plasmas.

Color accuracy: The Samsung UNB7000 scored well in this category, with excellent primary colors and color decoding, along with a solid grayscale that only lost accuracy in very dark areas. Connelly's skin under the hospital lights or the glare of the alien ball, for example, looked suitably pale and not overly ruddy or tinged with yellow green, while under the natural light inside her house it also looked relatively good. However, skin tones in bright areas were a bit flatter and seemingly less-saturated than on the other displays, which may be an issue with the improper gamma at the upper end--a necessary sacrifice to prevent dark areas from being too dark.

Like many LCD-based screens, the UNB7000 also suffered from a bluish tinge in blacks and near-black shades. The issue was visible in letterbox bars, the nighttime skies and Connelly's raven hair, for example.

Video processing: In addition to the three preset strengths of its Auto Motion Plus dejudder processing, called Clear, Standard, and Smooth, Samsung added a Custom mode this year, and its adjustability makes it the best implementation of a dejudder we've seen so far. Custom offers two sliders, one called Blur reduction that affects video-based sources and one called Judder reduction that affects only film-based sources. In our motion resolution tests, it was obvious that Blur reduction was doing exactly that: as we increased the slider from 0 to 10, the lines on the motion resolution pattern became more distinct and less apt to blur together, and the pattern looked best at 10. In that video-based pattern, playing with the Judder reduction setting had no effect.

The key is that with Blur reduction set to 10 and judder reduction set to 0, the cadence of film can be preserved while the blurring some viewers see with LCD (we don't notice it, but that's another story) can be largely reduced. We confirmed this by feeding the Samsung 1080p/24 content during the flyover of the Intrepid from "Legend," where the characteristic judder appeared more and more obvious as we decreased the judder reduction slider.

As usual, increasing judder reduction and thus apparent smoothness with film-based material also increased the incidence of unwelcome artifacts. In Chapter 11 when the camera follows Kathy Bates around the command post, for example, we saw the tell-tale halo-like distortion in the background near the edge of her body with judder reduction maxed out, while distortions largely disappeared when we reduced that control to the halfway point.

In resolution tests the UNB7000 performed well, delivering every line of 1080i and 1080p sources with still patterns, correctly deinterlacing 1080i material (note that we had to set Film Mode to Auto1, not the default of Auto2, to get this to work) and delivering between 600 and 700 lines of resolution in all of the AMP settings (note that reducing the Blur reduction lower than 10 decreased motion resolution on our test pattern). Plasma displays like the Panasonic and the Pioneer, by comparison, score 900 lines and above on this test, as did the Sony XBR8, KDL-52-XBR7 and Samsung A950 displays. As we've noted before, we find it tough to appreciate the benefits of any of these resolution characteristics in program material as opposed to test patterns.

Uniformity: The Samsung UNB7000 exhibited worse uniformity across the screen than the other flat-panel displays in our comparison--although it was better than the edge-lit Sony's KLV-40ZX1M. We noticed a brighter area along the bottom-left of the screen, as well as in the corners, that showed up in letterbox bars and darker scenes, such as the star field behind the opening credits, the interior of Keanu's tent and the dark lecture hall in Chapter 3. We also noticed that in brighter, flat fields such as the all-white of alien ball in Chapter 5, the left side of the screen appeared slightly darker than the rest.

In gray fields (from 10-70 IRE on our Sencore test pattern generator), we noticed more brightness variations across the screen, including a darker area across the top and subtle brighter splotches elsewhere. We didn't notice these variations much during program material, but they were more noticeable in test patterns than on any of the other displays in our test. It's worth noting that these issues can vary more than others from review sample to review sample.

When seen from off-angle, the UNB7000 also looked worse than any of the other displays in our comparison. Dark areas quickly washed out and became bluer, while brightness variations intensified, as we moved to either side of the sweet spot in the middle of the couch. The UNB7000 did seem to preserve its vertical viewing angle a bit better than the Sony or the Samsung A950, but both beat the UNB7000 in horizontal viewing angle.

Bright lighting: Samsung used the same sort of glossy screen as last year, and we're not its biggest fans. In bright lighting, with windows facing the screen and overhead lights turned on, the screen does a very good job of preserving black levels in dark areas. However, the trade-off is overly bright reflections from those light sources and from other bright objects in the room, such as this reviewer's light gray shirt. These reflections were much less bothersome during bright scenes, of course, but in darker scenes they proved distracting.

Standard-definition: On the off chance you do connect a standard-definition source to the Samsung, you find generally solid picture quality. According to our tests, the display handled every line of a DVD source and the shots of grass and steps from the detail test looked good. The set eliminated jaggies from video-based sources well, and its noise reduction cleaned up the lowest-quality shots of skies and sunset with aplomb. Finally, the UNB7000 passed 2:3 pull-down test by eliminating moire from the stands behind the racecar.

PC: As expected, the UNB7000 series delivered excellent performance with both VGA and HDMI sources from computers. It resolved every line of a 1,920x1,080-pixel resolution image with no overscan or edge enhancement.

TEST RESULT SCORE
Before color temp (20/80) 6223/6689 Good
After color temp 6563/6499 Good
Before grayscale variation 198 Good
After grayscale variation 69 Good
Color of red (x/y) 0.6397/0.3344 Good
Color of green 0.3068/0.5897 Good
Color of blue 0.1556/0.0645 Good
Overscan 0.0% Good
Defeatable edge enhancement Y Good
480i 2:3 pull-down, 24 fps Pass Good
1080i video resolution Pass Good
1080i film resolution Pass Good

Testing was only performed on the 46-inch UN46B7000, not on the 55-inch UN55B7000. For details, see the power consumption section of the UN46B7000 review.

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Where to Buy

Samsung UN40B7000

Part Number: UN40B7000 Released: Apr 1, 2009

MSRP: $2,199.99

See manufacturer website for availability.

Quick Specifications See All

  • Release date Apr 1, 2009
  • Enhanced Refresh Rate 120Hz
  • LED Backlight Type Edge Light
  • Display Format 1080p (FullHD)
  • Energy Star Qualified EPA Energy Star
  • Diagonal Size 40 in
  • Type LED-backlit LCD TV
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