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[等离子] 英国的avforum放出松下V10评测,很不错!16000人民币,国内又是个废的阉割版。

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2009-1-25
发表于 2009-5-9 17:50 | 显示全部楼层 |阅读模式

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           Panasonic TX-P50V10 ReviewTHX knocks some extra accuracy into Panasonic's already excellent Plasma Displays!In the past, I've been really, really happy with Panasonic's entry-level TVs. Why mention this in a review of the higher-end V10 series, though? Because I've often found that there's not been a lot of variation in terms of meaningful features when we compare Panasonic's cheaper models to their pricier ones. That's something of a back-handed compliment - what I mean is, where it really counts, all of the Panasonic plasmas could be described as "great" at the very least.
That looks set to change with the V10 series, though. Not only does this TV feature Panasonic's NeoPDP plasma panel, which all but guarantees spectacular contrast and motion resolution, but it's also one of the first TVs in Europe to finally feature THX Certification. This certification is a seal of VIDEO quality - THX isn't just about sound, remember - and guarantees that various aspects of the display's performance meet specific standards. Not surprisingly, many of these stringent tests (which you can read about at THX's site) are ones which we routinely perform here in AVForums reviews as part of our push for high quality video. It will be interesting to see if these qualitative criteria filter further down into the mainstream press now that a famous brand has been attached.
The most obviously practical implication of the above, though, is that the TV comes with a THX picture mode. Appearing alongside the usual "Normal", "Cinema" and "Dynamic" choices is the new option, which should deliver fairly accurate, high quality results, straight out of the box. It'll be interesting to see how close this can come to the usual full-scale calibrations we perform, but first, let's look at the TX-P50V10B's more superficial side.
Styling
Back when I reviewed the Panasonic G10 display – which is from lower down in the NeoPDP range – I was surprised that it wasn't much thinner than previous generations of Plasma display. Alongside low power consumption, excellent motion resolution and so-claimed "infinite" contrast, one of the much-discussed benefits of NeoPDP technology has been that it allows for slimmer TVs. Well, this has finally been realised in the V10 model. This display looks gorgeous, not just because it's only about 7.5cm thick (at its thickest point, that is – most of the frame is closer to 3.5cm), but because it's been designed with the increasingly popular "one sheet" concept in mind: the screen and frame are covered with a single sheet of glass, creating the illusion of a floating image and a less boxy unit. A word of warning, though: the said glass seems to be especially sensitive to oily fingerprints, as it took quite a bit of rubbing with a soft cloth to fully remove the marks my greasy mitts left on the front of the TV whilst unboxing. The thin edge of the frame is styled in slick, brushed black steel, which also looks great.
Panasonic's newly redesigned remote control is bundled with this TV, and it's a big improvement on some of the older variants. All of the buttons feel good and are well placed. The directional pad works well, and the thoughtfully positioned VIERA LINK, VIERA TOOLS, and GUIDE buttons are welcome. It even looks great!
The back and left side of the TV features enough inputs to keep just about everyone happy. Here we have 4 HDMIs (3 on the back, 1 on the side), 2 SCART terminals, Component inputs, analogue RGBHV (VGA/PC input), a set of Composite/S-Video inputs, and a LAN connection for hooking the TV up to your home router (and consequently, to the internet). There's also the usual inclusion of a port for Panasonic's baby, the SD card, which you can use to view digital photos. For TV signals, we have an aerial input for accessing Digital and Analogue terrestrial feeds, and an input for a satellite dish, which lets the TV receive the Freesat HD service.
Menus/Setting Up
The similarity present across Panasonic's Plasma ranges is immediately visible with the V10's menu screens: the options here are virtually indistinguishable from those on the cheaper G10 sets. It's not that we get off on screenfuls of video controls – in fact, I've even praised Panasonic's TVs for not featuring nonsensical and useless "enhancers" in the past – it's just that from our experience, a larger set of adjustments is needed for in-depth calibration and for performance fine-tuning.
Of course, let's not forget that we have a THX picture preset, so hopefully the work done by our friends in California will make up for any lack of adjustability. Naturally, we do at least have the standard Contrast, Brightness, Colour, and Sharpness controls. And yet again, we have Panasonic's "Colour Management" option, which doesn't allow you to actually manage anything! In most modes, this option will simply oversaturate colours, but in the THX mode, it simply does nothing (which is no loss). There's also an Eco Mode option, which makes use of an ambient light sensor to vary the screen's light output, Panasonic's usual noise reduction control (a spatial filter which cuts off high frequencies at the single-frame level; not very effective), and a "Multi Window" (Picture in Picture/Picture And Picture) function.
With the TV in the THX Preset, overscan (that is, the cutting off of the extreme edges of the picture to hide noise) is permanently disabled, so the option doesn't appear anywhere. If you're using one of the other presets, it appears in the "Display Settings" screen.
Taking the TV out of THX mode reveals an additional option in the menu for the other viewing modes: "Digital Cinema Colour". This option is designed, apparently, to mimic the colour gamut used in Digital Cinema applications. From our point of view, this is a misguided promotional exercise – why? Because this is a television, not a digital cinema projector! Feeding in video which has been designed and mastered for use on HDTVs and then skewing the colours out beyond their normal levels is only going to distort the colour reproduction - not enhance it.
Although we have a THX preset now – which, in theory, should give us closer to optimal results right out of the box – we still don't have Greyscale, Gamma, or controls for each individual colour (a real colour management system) in these user menus. Considering that Samsung and Toshiba offer options like these on their cheaper LCD TVs, and that LG provide it on both their competing Plasmas and their LCDs, we are once again disappointed that Panasonic have kept such a basic set of controls – especially on a higher-end display.
THX mode AccuracyI'm going to break tradition here and not discuss the basic calibration first. Instead, I'm going to talk about the results gained from simply turning the TV on, selecting the THX mode, then after letting it warm up, observing what it's doing and taking measurements: no calibration, no changing controls, just the THX mode as it's supplied.
So, I pulled up the test patterns that I normally use to set basic "front panel" controls like Brightness and Contrast. These first showed me that the TV wasn't revealing quite as much shadow detail as is possible in its default setting, with higher-than-black video beginning at Position 19. In Video levels, positions 16 and below are defined as black, but here, 17 and 18 were also appearing as black. I soon realised the rationale for this, however: raising the brightness by one click to squeeze a little bit of extra detail out of these areas blanketed the screen in a very delicate helping of PWM noise. As a result, I left it as it was. The white level pattern (used for setting Contrast) was perfect with no adjustments necessary.
One change I did make, though, was to the Sharpness control. Even in the THX mode, the TV was adding extra edge enhancement, until I changed the settings. THX's own guidelines mention the problems associated with adding artificial Sharpness, so I was a little surprised to see it here. For 1080p video, which should already be more than sharp and detailed enough, no additional tinkering should be going on. So, I set Sharpness to its minimum position, and all of the slight halos that previously blighted the image were removed.
After this came the measurements, necessary for controls which aren't possible to verify or correct by eye. Performance was close to bang on, and the TV delivered a correlated colour temperature of 6475 kelvin (VERY close to the 6500k we want). This is an absolutely fantastic result and means that the entire image will have an incredibly accurate look (all other things being equal).
And what of colour? One of my more minor criticisms of Panasonic Plasmas in the past has been relating to this area, but things were improved to a HUGE extent here. The red, green and blue primary colours all had Delta Errors below 3, meaning that their Saturation and Hue contained barely perceptible drifts. What lost this aspect a "Reference" score, though, was the fact that the secondaries didn't fare quite as well: although yellow was just about bang-on target, both cyan and especially magenta were quite obviously off-hue (the latter was skewed towards purpley-blue). Finally, and importantly, Luminance levels (that is, the amount of each colour present - not the saturation and hue of each individual colour) were also very close to accurate. A very, very impressive, lifelike result overall.
Well, I've just written about what the TV looks like out of the box with the same language and enthusiasm that I normally end up using for discussing the corrected, calibrated results! I think you'll agree then, that the THX certification has been a complete success in that regard (as has Panasonic's engineering). Of course, we're perfectionists here at AVForums, and the point of calibration is to make a system perform as well as possible. So, I naturally tried to improve even further upon these results.
CalibrationUnfortunately, the THX preset cannot be modified, so we have to fall back onto the "Cinema" viewing mode from this point on. The Brightness setting of this preset was already correctly set for my equipment (as it was with the THX preset). The Greyscale came set to "Normal", though, so the entire picture was overly blue. I set this to "Warm" for a more accurate colour temperature. I also turned off both the mislabelled "Colour Management" option, and the "Digital Cinema Colour" mode, which is pointless because this is a television. Then, I took these measurements...
As we can see, the Greyscale now exhibits different characteristics, which I later attempted to perfect. The overall colour temperature here measured around 6620k, which means that the overall image has a very, very slight blue cast (visible on the RGB tracking chart). More obviously, the colour reproduction isn't as good as the THX mode's (at least not using the default Colour setting). Red and green are oversaturated, although magneta is now on-target, which it was not in the THX mode.
In the UK version of this TV, to build on these results, we have to enter the service menu. Yes, I said "in the UK version", because the version sold in continental Europe – the TX-P50V10E - appears to feature an "Advanced Video" menu which contains user-accessible Greyscale AND Gamma controls. For some inexplicable reason, the UK model has been shorn of these. Admittedly, given that we're the country that invented television, our consumer display and review industries have an incredibly poor track record of adhering to and promoting quality standards, but the situation is never going to improve like this. Manufacturers with investments in high quality video like Panasonic are the people who have the power to change it - so why aren't they?
Entering service mode doesn't sound like too big a deal, but there's another issue here: although this menu lets us adjust these values, the Greyscale visible in service mode changes once we're back in the user mode – the measurements are not the same! In other words, to perform a change that our friends in continental Europe can make with ONE remote control click, we have to:
  • Enter the service menu with the secret button combination
  • Set the TV back to the AV input
  • Re-select the CINEMA mode
  • Navigate through the cryptically labelled engineer's screens to find the Greyscale adjustments
  • Change one of the settings by making an educated stab in the dark
  • Turn off the TV and wait for it to turn on again
  • Re-select the AV input that has the test pattern device attached
  • Wait for the TV to "sync up" and for the picture to appear
  • Take a measurement and repeat
This is just to alter the Greyscale, by the way. The option to change the Gamma is not present on the UK version at all, not even in a hidden menu. Panasonic, what were you thinking? It goes without saying that the entire calibration process is going to take much, much longer, and the end result might not be as good as it could have been if we could simply change the options in an easy-to-use menu. Considering that LG has such a menu on their cheapest TVs (and on the UK versions as well, no less!), it's frankly insane that Panasonic - one of the key pushers of Plasma technology - do not. We seriously hope that this oversight is remedied on next year's models, in all territories.
Anyway, after hours of tweaking, all I'd accomplished was making a very, very marginally better Greyscale result. The out of the box results for Greyscale were already excellent, so it looks like Panasonic have just about outdone themselves (and us) in this area. The colour reproduction was becoming more like the THX mode after only lowering the Colour control and disabling both of the colour mis-features in the user menu, with luminance being closer to correct. There was one large difference, though: while the THX mode had a large magenta error, our own calibration did not. Unfortunately, our own calibration also undersaturated yellow (this error was much smaller than the THX mode's magenta error, though).
There is still one problem which sealed the deal, thogh: overall Luminance. In the Cinema mode, the entire image had a far less rich look when compared to the THX mode, which had a more accurate gamma curve (see images above). Guess what would have been useful here? That's right, the Gamma adjustment, which we haven't been given. As a result, we are now torn between these choices:
  • THX mode out of the box: excellent Greyscale, excellent hue and saturation of Primary colours, large error with Magenta. Great Luminance of colours. Most accurate gamma.
  • Cinema mode out of the box: less excellent greyscale, but still excellent. Colours oversaturated, but all on-hue. Luminance of colours is too high. Different gamma curve means that image looks a little washed out.
  • Cinema mode calibrated: very, very good greyscale second only to the THX mode, excellent overall colour reproduction, but Yellow is undersaturated. Gamma is not correctable on UK version, so image still washed out.
The Cinema mode is still very good once calibrated, make no mistake, but if Panasonic had only given us full control over the Gamma, it could have been far, far better and perhaps taken the edge away from the THX mode, which I settled with. I came to this decision because of the slightly washed-out look presented by the other modes, and the THX mode's more accurate primaries. Of course, the only way of knowing this for sure was to do these tests, so the hours of tweaking weren't in vain, as they contributed to an educated decision.
Video ProcessingPanasonic's TVs normally skimp in the video processing area: they don't do the best possible job of upconverting standard-def content to HD, nor do they adapt to the presence of Film-sourced content and deinterlace it optimally. We forgive them for it, because we can step around the problem much of the time by outsourcing video processing duties to an Upscaling DVD player, dedicated video processor, or in my case, an AV receiver with video processor-like functionality. I had a hunch that this display was going to be the same, and I was right: the TX-P50V10 has no film cadence detection features at all, so treats everything as if it were content captured with a Video camera (an altogether different beast). This means that you'll see jaggies where there shouldn't be any in Film-sourced content, and suffer from a loss of vertical resolution in these cases.
Scaling (upconversion) was also fairly soft, as usual. As always, I recommend having another device perform the conversion to 1080p and then send this already processed video to the TV for display. Of course, since the built-in TV tuner is, well, built-in, this means that TV shows from Digital Terrestrial TV have to be processed by the TV's own less-than-ideal (or non-existent) algorithms. As always, I didn't find this to be a great loss, because broadcast TV quality is average to shockingly poor anyway. If you have an external TV receiver, like a satellite, cable or Freeview box, you'll be able to run it through a processor and then onto the TV, sidestepping the issues.
Picture QualityHaving finally settled on the THX mode, it was time to sit back and enjoy. I picked out Warner/New Line's Region A Blu-ray Disc of Domino, which is highly stylised, highly detailed, and highly contrasty. Wow. The TX-P50V10 didn't let it down: the film looked gorgeous and the panel delivered all of the punch and all of the detail from this great-looking disc.
Contrast was just absolutely excellent: blacks were incredibly deep while viewing with the room lights off, and the overall accuracy of the image meant that this highly stylised film was highly stylised in the way intended by the filmmakers - not as intended by a consumer electronics company's engineers! 24p input from the BD Player was handled correctly, too, without any 3-2 judder. The TV does feature yet another misleadingly named option called "24p Smooth Film", which should be turned OFF to gain judder-free 24p playback. What this option does is interpolate motion by generating new inbetween frames, and in doing so, creates a silly video-ish look. It's disabled at all times when using the THX mode.
Animated movies, like Disney's recent US Blu-ray release of Bolt looked amazing, too. Often, I've heard people describe the look of a badly set up display's colours as "cartoonish" to describe their performance shortcomings, but this is a mistake: even although they're not always shooting for realism, creators of animated films (at least the better ones) make precise and careful decisions to evoke moods in much the same way that live-action filmmakers do. This was perhaps the most eye-opening demonstration of the differences between the calibrated Cinema mode and the THX mode: the latter was far richer thanks to the more correct Gamma and colour luminance. There's a scene near the end in which a darkened movie set catches fire, which, apparently, was one of the most eye-opening scenes in the 3D Cinema version on the film. It's honestly hard to imagine that it looked as amazing as it does on this display.
I was so happy with what I was seeing that I also pulled out a DVD that I myself colour corrected, restored, encoded and authored, the Region 1 release of the cult French film L'important c'est d'aimer ("The Important Thing Is To Love"). There's a shot at the very beginning of Chapter 2 which features French actress Romy Schneider under deliberately strong light. On poorer displays, the strong light and incorrect luminance levels cause her face to look sickly and powdery. In the THX mode on this TV, the effect is exactly as intended: she looks like she's under strong light, rather than looking pale and ill. I only wish that I could take accurate pictures of the TV to show the difference: the job this thing is doing is so good that I want to share it. The overall effect is just as the original filmmaker and I intended it to be.
So, to sum up: we have the accuracy of the THX mode, the contrast performance of Panasonic's NeoPDP technology, and of course all of the other characteristics of Plasma displays (a wide viewing angle, a phosphor-driven natural TV-like picture, excellent motion resolution, and also the usual PDP quirks: a little bit of mild dithering/posterisation and PWM noise). The result? Overall, beautiful!
Gaming PerformanceVideo gaming performance was fantastic on the TX-P50V10. I could not detect any input lag whatsoever using my usual test game (Halo 3 on the Xbox 360, with the console scaling to 1080p). In fact, the TV was so responsive that I actually had to lower the game's controller sensitivity option, which I've had turned up to compensate for the TV lag that I'm all too used to. Games took on a new lease of life thanks to the lack of delay - the responsiveness was just a breath of fresh air. I wouldn't be surprised if users of this display have a serious advantage in online games over a lot of other people.
Extra FeaturesThe most notable extra features here are the VIERA Cast and also the Media viewer functionality. VIERA Cast uses the internet to deliver services such as YouTube, Picasa photo sharing, EuroSport, and Bloomberg. Since it relies on a web connection, you'll need to run an Ethernet cable from the TV to your home router. The software in the TV is incredibly responsive and is a decent "light" alternative to fully-fledged web access, meaning that unlike a lot of comparable systems on other TVs, I would actually use this one. The media viewer functionality is fairly standard and doesn't present anything of note - it works!
Power ConsumptionPanasonic seem to be aware that the perceived energy consumption of Plasma displays sometimes acts as a deterrent to eco-conscious customers buying them. Perhaps almost as much, in fact, as the misinformation often parroted by the youths at your nearest box-shifting electronics warehouse. Using full-screen patterns, I measured the consumption of the TV at various brightness levels. These measurements were taken in THX Mode with Eco Mode both on and off.
0 IRE (Full Black) - 50 IRE (Grey) - 100 IRE (Full White)
Eco Mode OFF: 85 - 310 - 520 (watts)
Eco Mode ON: 85 - 230 - 495 (watts)
Remember that a Plasma TV's power consumption varies depending on the brightness of the screen (unlike most LCDs, which have a constantly-lit backlight) - as you can see, an all white screen consumes maximum power, whereas an all black screen consumes a very small amount. Most viewing is going to fall somewhere in-between, so I think it's safe to say that Panasonic's usual eco-friendliness has well and truly been realised here - these numbers are very good indeed for a 50" Plasma.
ConclusionNormally when I review displays, I make a point of reviewing what strengths the unit does have, rather than wondering what might have been. The TX-P50V10B is a bit of an exception to this rule, for two reasons: firstly, there is an almost identical version of this TV available in other European countries which is better featured than this one. And secondly, this display should really feature more calibration controls: what's on offer here is essentially identical to the entry-level models in this regard. I'm fairly confident that having the missing controls present would have raised the performance - perhaps enough to even also raise our review scores - to another level. Perhaps it wouldn't have, and I'd have recommended the THX mode anyway. Regardless, all I can do in this situation is wonder.
With a certain other company pulling out of the PDP market lately, video enthusiasts are counting on Panasonic to step up and provide high quality images in the same way that Pioneer once did: through adherence to standards, which exist for a reason. The THX mode is an absolutely fantastic step in this direction - but it's just one step. Regardless, the effectiveness of this mode is undeniable: a one-touch mode for utterly brilliant video is too much to stay mad at regardless of the other controls the TV does or does not have. Do consider this, though: were it not for THX's input into this TV's behaviour, there would be almost nothing to set this model apart from the considerably cheaper G10 series. Thanks to them, though, the out of the box Greyscale performance is wonderful, and the colour reproduction is fantastic – leagues ahead of the usual "pumped up" look. This makes for an absoutely excellent display which is not only kind to standard definition content, but one which realises HD (almost) to its full.
I started this review by mentioning that none of Panasonic's Plasmas are bad TVs (not by a long shot), and I'm about to finish it in the same way. I do think that especially at the higher end, the company should be including more calibration controls to add value for money. Several manufacturers of what often turn out to be lesser displays are managing this feat, so we can only dream what Panasonic could achieve by implementing such features. For now, though, the THX image mode combined with Panasonic's Plasma know-how win the panel a Highly Recommended badge.
Pre-order the V10B series displays at Amazon UK: TX-P42V10B (42") - TX-P50V10B (50")
Pros
  • NeoPDP contrast performance and black level are excellent
  • Extensive connectivity options (Digital Terrestrial, Digital Satellite, Analogue Terrestrial, HDMI...)
  • THX mode results in absolutely brilliant Greyscale performance...
  • ...and very, very, very good colours, straight out of the box; the image is often good enough to get lost in
  • Sublime detail thanks to 1:1 1080p input, and lack of "enhancers" to ruin the picture
  • 24p input is handled correctly, judder-free
  • Video gaming is incredibly responsive
Cons
  • The lack of calibration controls is silly on a TV of this level (and of this price!): cheap LCDs sometimes have more control
  • UK version is inferior to continental European versions in this regard - whatever the reason behind it, this is UNFAIR
  • Gamma is incorrect, and we have no control over it in the UK version (see above)
  • Standard-def video deinterlacing and scaling are lacking
  • THX mode has large error in Magenta hue
Note: scores are based on the THX preset.
Scores
Contrast ratio/dynamic range
Black level
Colour reproduction out of the box
Colour reproduction calibrated
Greyscale out of box
Greyscale calibrated
ISF or calibration controls available
Video processing SD/HD
Sound quality built in
Networking
Features
Ease of use/menus/remote/settings
Value for money
Overall
Our feedback for Panasonic
  • It might be beneficial to look towards budget manufacturer LG for some inspiration on some more advanced calibration controls. We don't insist on these because we enjoy tinkering with settings - they genuinely allow us to improve the quality of the picture by bringing the TV in line with mastering standards as closely as possible.
  • It's one thing for most of the viewing modes to have slightly washed-out Gamma characteristics, but it's another to deny UK users a chance to alter it. Why is it present on the European version but not on the UK model? Should British enthusiasts instead import the continental European version?
  • The service menu: the Greyscale visible here is slightly different to that of the user mode, meaning that the calibration process is incredibly time-consuming. Why are we not given user-accessible controls like in the continental European version?
  • Well done for passing this display through THX Certification. The benefit to the image through their enforced standards is huge and frankly, if it were not for this, this review wouldn't have been nearly as favourable. But please allow us to make our own way to this level of quality next time, rather than forcing us to use the THX mode to gain accurate colour (and more accurate gamma).

Panasonic TX-P50V10B 50 -inch Widescreen Full HD 1080p Plasma TV with Freesat HD & Viera Cast by Panasonic

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[ 本帖最后由 fanglinghong 于 2009-5-9 18:00 编辑 ]
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发表于 2009-5-9 17:53 | 显示全部楼层
什么东西给阉割了啊,楼主能说下吧看不懂外语啊
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发表于 2009-5-9 18:05 | 显示全部楼层
就看懂一个price

[s:29]
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 楼主| 发表于 2009-5-9 18:07 | 显示全部楼层
原帖由 天剑之上 于 2009-5-9 17:53 发表
什么东西给阉割了啊,楼主能说下吧看不懂外语啊

  那些图片发了链接都贴不过来,没有办法,不好意思!
 只要松下一天没有在国内的机器上装THX模式,松下的等离子就不会有好的表现!这些欧洲美国评测对松下的高度评价都是基于这个THX模式的!
  这个THX模式就好像索尼的pro专业级画质处理引擎那样,有增强对比度,增强锐度,强化细节,强化色彩和层次感的功能!没了THX模式的松下就等于没了pro引擎的索尼液晶!
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发表于 2009-5-9 18:23 | 显示全部楼层
国内松下就是疯了,一帮傻×销售,牛叉哄哄的,等LED直射液晶出来,松下也就死了
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 楼主| 发表于 2009-5-9 18:30 | 显示全部楼层
原帖由 weiwangno1 于 2009-5-9 18:23 发表
国内松下就是疯了,一帮傻×销售,牛叉哄哄的,等LED直射液晶出来,松下也就死了

  说得好,兄弟!只要松下在国内不上THX模式的等离子就不买它的帐!!
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发表于 2009-5-9 22:00 | 显示全部楼层
原帖由 weiwangno1 于 2009-5-9 18:23 发表
国内松下就是疯了,一帮傻×销售,牛叉哄哄的,等LED直射液晶出来,松下也就死了

LED直射液晶是什么?好像很牛X哄哄的嘛,请上台讲解一下呢.
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发表于 2009-5-9 22:30 | 显示全部楼层
THX
是 卢卡斯办的 认证  交钱的


还 thx 模式  真搞笑 “THX”其实是一种“产品认证”,THX是Tomlinson Holman Experiment的字头缩写,就像我们常说的ISO90019002等。它是卢卡斯影片公司针对商业电影院制订的一种体系认证。其目的是要让电影院画面的亮度、均匀性、反差等级和声音的声压、声频响应、声道平衡度、房间有混响时间、隔音要求等等给出各种具体的规定。
  后来公司的服务又发展到音响设备的THX认证上,如果设备能达到THX声场对某种设备的要求,就可认证为THX设备。这样就有了THX碟片、THX功放和THX音箱等,后来甚至不少游戏都要符合THX认证,例如最近刚刚推出的《指环王》。THX认证主要关心视频质量、音频质量和可靠性。
  DVD碟片的THX认证,主要也是对DVD碟片内容的影音质量的认证,就是你的制作设备、过程、控制手段是符合THX的要求,那么你的DVD碟片内容播放出来的效果也是会符合THX的要求。THX重点是视频和音频质量,因为视频和音频制作技术和检测手段比较难一些。而可靠性则相对简单,尤其压盘,按DVD规格做就可以了。但它能保证的是所有THX认证过的DVD碟片能在所有THX认证过的DVD播放设备上完全一致地展现出来。所以要得到最佳的视觉和听觉效果您的DVD播放设备也必须符合THX。
  虽然看起来THX认证是些无关紧要的标准,但它对待其标准苛刻的要求的确值得提倡。例如DVD中公认的经典——T2Extreme,在制作时本来想采用1034线的旧视频母带,可就被THX给否定了,硬是逼着艺匠公司新做了一个1080线(新的高清晰视频标准)的母带来采集和压缩。
  所以如果您看到DVD影片中有“THX”的字样,那么它就是影片品质的保障。
  目前,THX认证分为四种:
  1:THX
  THX处理系统分为三部分,其一是Re-Equaliazation再等化;其二是Timbre Matching音色匹配;其三Adaptive Decorrelation关连适应。
  再等化的目的是将为电影院大空间以及专业音响设备而录制的电影音效作处理,尤其是让高频段与低频段处理以更适合家庭小空间播放,让声音有更好的平衡性。
  在电影院中,环绕声道不只是两个环绕音箱,而是一排多个的“阵列”音箱。因此,电影院的环绕音效包围感好,其声音与家里只使用二、三个环绕音箱有很大的不同。音色匹配就是把电影音效先经过处理,使家里环绕声道所发出来的音色能够与主声道的音色相搭配。
  普通家庭中的环绕包围感与电影院有很大的差距,在家里欣赏时,最佳的聆听点是在最中央的位置(即皇帝位),只要离开这个位置,包围感就会减弱。为了得到如电影院般身临其境的现场包围感和有较大的最佳聆听区域,THX改变其中一个环绕声道的相位与时间延迟,故意让两个环绕声道产生相位差与时间延迟,这样就能够只用两个环绕音箱便得到如电影院般的多环绕音箱的包围感。这就是关连适应的作用。
  THX的上述三大功能是在杜比数码或DTS解码之后的再处理,它是自动生效的。另外,THX还具备Bass Management(低频管理)、Bass Peak Level Manager(低频音量峰值管理)、LoudspeakerPosition Time Synchoronization(音箱定位时间同步)等三种小功能。这三个功能是在选单中应使用者的要求而选用的。
  与杜比数码和DTS不同,THX的超低音上限仅为80Hz,而不是120Hz,只要您选中的THX设定,所有设定参数都会依照THX要求设定好。由此可知,THX处理并不只是一个认证商标,它的存在会让声音的平衡性更好,能够让两个环绕声道产生有如电影院般的浓密的现场感。
  不过,早期的THX处理程序只对DVD电影音效才起作用,使用其他音乐软件时并不会启动THX处理程序,因为这些音源都不是为电影院大空间所录制的音效。
  2:THX Ultra
  当前很多高级影音功放面板上都标有THX Ultra或THX Select或THXUltra2其中一个标识,它们各代表什么呢?简单地说,THXUltra是THX的升级版,它主要应用于较大空间或有更好的超低音表现的场合。适用于3000立方英尺(85m3)左右的空间。但在各项影音器材和空间的认证上,THX Ultra比早期THX有更严格的要求。
  3:THX Select
  THX Select是THX Ultra的小空间版。THX Select则着眼于让小体积的音箱能够得到大音箱的音效。它主要针对室内容积在2000立方英尺(57m3)左右的空间,它只对影音功放和音箱认证,而其它THX标志可针对空间认证。
  4:THX Ultra 2
  这是THX的最新认证。THXUlrta2的重点是对8声道的重播处理与认证,要求功放具备有最新的Dolby Digital Surround EX/DTS-ES6.1解码功能,并强调放大器要具备控制环境对低频的影响能力,以免产生浑浊不清的假低音。与前两代处理系统不同,它配备全新的ASA(AdvancedSpeaker Array)先进扬声器数组技术和Ulrta2 Cinema/Ulrta2Music两种环绕强化模式,无论是对电影音效和多声道音乐都能处理。其中Ulrta2Cinema模式可营造出接近电影院多组环绕音箱的效果,而Ulrta2 Music模式则可在聆听音乐时表现出更宽广的环绕音效。THXUlrta2还要具备推动低阻抗音箱的能力与更高的信噪比特性,以对应未来各种最新的高音质数字音源。同时,它还对视频的处理转换有更高的要求,要求机内的视讯传输频宽要达到HDTV水平,至少在50MHz以上,并且能够接受逐行扫描讯号的转换。对于操作使用的简捷程度,它也有相应的要求,是目前家庭影院器材的最高认证标准。

[ 本帖最后由 iorycloudy 于 2009-5-9 22:32 编辑 ]
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发表于 2009-5-9 22:34 | 显示全部楼层
[s:14]
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发表于 2009-5-9 22:50 | 显示全部楼层
不知道哪位兄弟说的对啊[s:8]
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