Home Theater View

Overcoming a Low Ceiling

Electronic House poses a terrific real world question: how do you set up a home theater with a projector in a room without the headroom (literally) to hang a projector from the ceiling? Too bad they don't spend much time walking through the different options and just describe the finished room (which placed the projector on a shelf at the back).

Lessons From Panasonic's Plasma Day

On Tuesday, I, along with a handful of tech journalists, was invited to attend a briefing by Panasonic in New York to show off their latest line of plasma televisions. The emphasis was on the technical capabilities of Panasonic's plasma technology relative to the latest LCD with LED backlighting.  Some things I learned:

1. Never have a Japanese engineer who doesn't speak fluent English give a marketing presentation to journalists. Yes, there was a lot of technical detail included, but the fundamental reason Panasonic was doing the briefing was to spin the technical detail, otherwise they would have just provided a white paper. While the presentation itself was pretty good, it was agonizingly slow going in parts, and key points just weren't made well.
2. Plasma's burn-in issues are a thing of the past. Non-issue with current sets. Now, the legal guys haven't gotten the message, so you still see a warning in the manual not to allow static images to linger on the screen, but some of the sets are deliberately marketed as better for gaming (which they are). The manuals need to be updated and this issue needs to be taken off the table.
3. Plasma is actually brighter than LCD over smaller areas. This is irrelevant overall - the sample images on the LCD during most of the presentation jumped out at you in a way that plasma does not. Ergo, consumers prefer LCD at retail. (It's more balanced on calibrated sets in a home environment, but on bright images, LCD is superior, and on dark images, plasma rules.)
4. Plasma has markedly better color than LCD, especially off-angle. Sadly, this is basically impossible to see in retail environments with uncalibrated televisions.
5. Maximum energy usage on a plasma is still high if you display white fields all day long, but Plasma and LCD are pretty close in terms of energy consumption on real-world program material. LCD is still better (and has a much better number on the energy use sticker), but it's not a reason to disqualify plasma any more.
6. Plasma is much, much better for resolving high definition when there is motion in the image. This is a key fact that Panasonic should be marketing hard, especially since the LCD competition charges more for sets that try to compensate by speeding up refresh cycles, and they are still noticeably worse on test patterns and real world content.
7. How a TV is set up at retail is critical: the LCD set they had on hand for comparison showed more stars in a starfield, and none of us cared that the gamma of that set may have been off - there were far more stars visible on that TV than on the plasmas. And we actually know what gamma is - the average consumer never touches picture controls when they get their TV home.

All in all, I came away with a better understanding of why I still prefer plasma over LCD for most uses, and why most consumers are buying LCD anyway - and are unlikely to change any time soon.

Mailbag: Is Calibration Worth the Expense?

A reader asks: I’m thinking of having my Hi Def Sony XBR2 calibrated by Best Buy. Is this worth the $300.00 or not? Appreciate any advice.

Calibration was an absolute necessity back in the tube days, but with the advent of digital panels (plasma or LCD), getting – and keeping – settings accurate (or reasonably close) is much easier to do yourself. However, an installer can often get into service menus and offer finer level of control. Is that worth $300? If you’re a perfectionist watching movies, definitely. If you are a casual viewer watching reality TV shows, definitely not.

If you plan to go the full calibration route, make sure that the folks at Best Buy have ISF certification before you agree to anything; simply getting a tech to your house messing around with service menus can make things worse rather than better.

If you plan to calibrate your set yourself, you should buy one of the calibration DVDs on the market ($30 - $50); not only do they provide instructions on the different settings and how they interact, they are chock full of test patterns designed to make it much easier to see the differences as you make changes.  

If none of that seems worth the hassle, at least page through the different settings your TV comes pre-programmed with. The "Vivid" setting is designed to stand out on a showroom floor in poor lighting, and it will burn your eyes (not literally - I hope) if you watch it that way at home. The "Cinema" or "Movie" mode is usually the most accurate. If that mode seems too dim, leave it there anyway and give yourself a few minutes to adjust your eyes to seeing subtle color differences again.

Post CES Thoughts and Unintended Poetry

As usual, I attended CES 2009 and spent a lot more time talking with mobile devices vendors (my day job) than home theater. This was a good strategy for anyone this year because the Palm pre stole the show, but there were still plenty of thin LCD TVs, 3D TV, mobile TV, and a few speakers and receivers sprinkled throughout the sprawling show floor. I didn't make it to the Hilton, where most of the high end audio was housed, at all. Still, it's hard to avoid home theater when you have to attend press conferences from Sony, Samsung, LG, Toshiba, etc. and walk the show floor.

After talking to the Dolby Mobile folks, I was pressed into sitting through a terrific demo of Dolby IIz, which adds a (derived, not native) height channel. I've been using Yamaha receivers for years that perform the same trick, so I could certainly appreciate the notion - Dolby seems to be going more for sound placement (i.e., making it sound like the helicopter is hovering above you), while Yamaha is intended for room augmentation (i.e., making it sound like your room is bigger). The 9 minute demo certainly sounded great, but if I listened to my own home theater at those volume levels I'd be deaf before the end of the movie.

I also saw the latest generation of DLP in both super-large format (Optoma's HD8200 projector) and small (TI-powered pico projectors for use with cellphones were everywhere). I stopped by the Optoma booth to see the pico projector, and stayed for a short demo of the HD8200 on a 2:35 screen in a completely dark room. They were playing a clip from I Am Legend, a movie I have only seen in projector demos, so I know the clip well. Contrast ratio and black levels were insanely good, but there was weird artifacting that appeared just before fast motion content that drove me crazy. It could be an issue with the setup, the source, or a bug in a preproduction demo unit, but if I had bought that system, I'd be returning it.

Finally, at the Sony press conference the swag was an eco-friendly bamboo fiber bag, which feels like silk and is apparently intended to be used (and reused) for grocery shopping. Or something. When I unpacked it after the show, I noticed that the care tag is unintentionally poetic and hilarious, a sort of bad translation haiku:

CAUTION
Do not close to fire
Only for shipping bag
Hand wash
Washing will shirink slightly
Only non-chlorine blench
Wet dark cloth will fadeing
The color will fading under sunlight or fluorescence for long time

Profound.

-avi

Home Theater Basics: 720p vs. 1080p, Analog/Digital Switchover

Here's one from the mailbag:

Avi, We want to buy a 37" LCD TV. Is there a significant difference between 720P and 1080P?

 

Yes, there is a significant difference between 720p and 1080p – though it depends on what you’re watching on it, and even then you may not be able to see the difference. The bottom line  is that you can almost always get away with buying a 720p set and saving the money, but nobody seems to believe this answer, so here’s a slightly more involved one:

 

First, two quick definitions:

1.      the “p” in 1080P or 720P = progressive, where the signal has information in every horizontal line, just like a computer monitor.

2.      the “i”  in 1080i = interlaced, where the signal alternates horizontal lines similar to the way an analog TV works – the information alternates fast enough that you usually can’t tell the difference.

 

Now you need to answer two questions:

 

What are you watching? (You want to be able to display all the information that your signal contains, but how much information is actually in that signal?)

 

·        If you’re watching a DVD, it’s 480p. So even a 720p TV is overkill – either the TV or the DVD player will do some magic to “fill in” the extra pixels it has to make up the picture.* A 1080p set has to fill in even more pixels with guesswork.

·        If you’re watching HDTV, it’s either 720p or 1080i. Some channels use one resolution (for example, NBC uses 1080i) and some use the other (for example, Fox uses 720p) – this happens behind the scenes when you change channels; you don’t have to do anything. 720p and 1080i both have about the same amount of picture information (720p tends to look better for fast motion like sports, while 1080i tends to look better for scenes without much motion, like dramas), both count as real HDTV, and both look spectacular when displayed properly on an HDTV.

o   When you watch a 720p channel on a 720p TV, you’re seeing everything that’s there.

o   When you watch a 1080i channel on a 720p TV, first it fills in the interlacing by guessing what the missing line ought to be, and then drops a bit of the resolution.

o   When you watch a 720p channel on a 1080p TV, it does some magic to “fill in” the extra pixels.

o   When you watch a 1080i channel on a 1080p TV, it fills in the interlacing by guessing what the missing line ought to be.

·        If you’re watching a Blu-ray disc, congratulations, you’re watching the only consumer format capable of displaying full 1080p.

o   A 720p set throws out some of that resolution; it usually still looks better than a DVD.

o   A 1080p set displays all the information on there without any changes.

 

Now, let’s assume you are going to watch Blu-ray discs 100% of the time. Question two: can you actually see the difference between 720p and 1080p?

This will depend on several factors:

·        How good is your eyesight? Seriously.

·        How big is the TV, and how far away are you sitting? In smaller screen sizes it usually doesn’t matter if you’re cramming one or two million pixels into the set; unless you’re sitting two feet away you won’t be able to see the difference. Higher resolution allows you to sit closer to the set and does nothing for you if you’re farther back. For example, if you’re sitting ten to twelve feet back from a 50” TV you literally cannot see the difference between 720p and 1080p. Some people want to get the higher resolution anyway. I am not one of those people. My couch is about 12 feet away from my displays, and my 50” plasma is a 720p model. My projector, on the other hand, projects onto an 8’ screen that comes down in front of the plasma; the projector is a 1080p model because when the images are projected that large, the difference between 720p and 1080p is quite obvious.

 

Conclusion: unless you plan to sit awfully close to that 37” set and watch a lot of Blu-ray discs, there’s no reason to spend more on a 1080p version. If you insist on spending money for something you can’t see, I won’t stop you. But you’ll be much happier if you put the extra money into a good surround sound system.

 

Does the upcoming change in broadcasting frequency have any impact on the reception?

 

It depends. If you’re getting your TV shows from cable or satellite, the analog/digital switchover will make no difference whatsoever. None. You do not need to do anything at all.

If you’re getting your TV shows from an antenna, then you’ll need either a new HDTV with a digital tuner built in, or a new tuner/converter box. Your reception will either get much better or much worse, and it will vary by channel, how far away you are from the station, and (in some cases) your physical location (i.e., if you’re at the bottom of a hill or sandwiched between big buildings). Digital channels do not degrade gradually. A rough rule of thumb is that if you get a reasonably clear channel today, you’ll probably get an even better looking version of it on digital. On the other hand, if you have a snowy channel that’s just sort of watchable today, once it goes digital you probably won’t get it at all.

 

Hope this helps,

 

-avi

 

 

*720x480 progressive, or about 350,000 pixels of actual information per frame. This is a gross oversimplification, but it provides a good basis for comparison. 1280 x 720 = around 900,000 pixels. Incidentally, this is why watching analog TV channels or VHS video on an HDTV usually looks much, much worse than it did on your old analog TV; the new TV is trying to take very little information (VHS is roughly 240i, or 480x240 every other frame, or the equivalent of about 60,000 pixels) and displaying it on something expecting more than ten times that information to create the picture. Without much to go on, the TV fudges, which, instead of looking soft and fuzzy like an analog set, looks blocky and horrible.

New Wireless HDTV Standard(s)

A bunch of big companies are getting together to standardize wireless home HDTV transmission. Again. The AP reports the details here. Most of the commentary I've seen has been fairly positive, though everyone points out that several of the big players backing WHDI are separately supporting WirelessHD as well. Could we have a standards war here?

Jeremy Toeman is taking a contrarian stance, saying it doesn't matter. He makes some good points:

• WHDI products aren't expected to hit the market for at least a year or two
• Testing this stuff will take forever
• Even if it just adds $100 to the cost of products, the rise of brands like Vizio proves that many consumers are primarily driven by price

In the short term, he's right. Nobody is going to put off buying a new TV today because in 2 - 5 years a wireless version will be available. Those who need a wireless solution today -- in the home theater industry, installers will always run into problem rooms -- will be willing to pay for expensive proprietary add-on gadgets that solve the particular problem. Longer term, though, it does make sense for there to be wireless options that work across vendors. At one time, wireless PC standards (ex: WiFi) were supposed to take over in the A/V world, but the bandwidth to pass HDTV unaltered on those doesn't exist outside the lab. I wonder whether any of these consortiums will get something to market that actually works in a reasonable timeframe - I've seen demos of this stuff at trade shows for years now. Because even once TVs and set top boxes have such a standard built in, you'll need to buy a new TV AND a new set top box to see the benefit. So for the forseeable future, nothing changes, which explains why Sony and Samsung are backing multiple standards, and why Jeremy can't bring himself to care.

In NYC next week? Come "Downtown"

If you're in the Wall Street area next Thursday, I'll be moderating a panel at Digital Downtown on Flat Panel TV Trends:

Plasma and LCD TVs are the center of any digital home. The category's success is driven by the produts' fashion appeal and picture quality as well as the DTV transition. Listen to our panel of industry experts discuss the current trends affecting the flat panel TV market and where it's heading.

The session is free to financial analysts, press, and "invited guests." You can register here.

Product Review: Accell 4x2 HDMI Switcher

HDMI was supposed to bring the home theater world from the confusing age of multiple cables for audio and video (and sometimes multiple audio cables and multiple video cables) down to just a single cable from each component to your display. If your display doesn’t have enough HDMI inputs for all your sources, you need an HDMI switcher or a receiver which has an HDMI switcher built in. Then you need an HDMI cable from the each source to the switcher or receiver, but just one from there to the display. Fortunately, even some budget receivers now have HDMI switching built in (starting around $400), and there are good inexpensive HDMI switchers on the market like the XTremeMac HD Switcher I reviewed last year.

But what if you have two displays?

At least in terms of receivers, you’re in a completely different price category – no $400 receivers for you. The least expensive receivers I could find with dual HDMI outputs are from Onkyo and Denon. Onkyo’s TX-NR905 has extremely high end video processing, advanced room correction that smooths the sound at multiple seats, a ridiculous amount of amplifier power with THX Ultra2 certification, the dual HDMI outputs we’re looking for, and a price tag that ranges from $1500 - $2000 (assuming that you can find one in stock. It seems that they’ve been selling quite well). Unfortunately, only one HDMI output works at a time, and to change between the two HDMI outputs, you either must physically press a button on the front panel to cycle through the settings, or adjust a setting in the menu. Neither option is conducive to automation by a universal remote control which is a fairly common way to use a product in this price category. Denon sells the AVR-4308CI, which is also chock full of features, as you might expect for a product that sells in the $1800 - $2400 range. On the Denon, the dual HDMI outputs are driven in parallel; there is no way to select them individually. This is fine for some situations, but it means that whatever the source device is outputting had better be perfect for both displays if they’re both turned on at the same time (only one display gets to handshake with the source device through the receiver and tell the device what display resolution, frame rate, etc. it wants).

There are several HDMI switchers on the market with dual HDMI outputs, and they’re a lot less expensive than buying a new $2000 receiver. Accell has sent cables here in the past, and when I saw them at CES this year they were showing off an entire line of reasonably priced HDMI switchers, topping out at a 4x8 switcher – four sources hooked up to eight displays for those times when you want your rec room to look like a NASA shuttle launch. The Accell UltraAV HDMI 4-2 Audio/Video Switch is far more reasonable (4 sources to 2 displays), and lists for a very reasonable $299 when most similar switches start at $500; I asked them to send one over for review.

It wasn't perfect, but overall I liked it: it does one thing (switches HDMI signals) for a reasonable cost, and it does it pretty well, though with some caveats. It’s quite small and I had no trouble installing it. I didn’t have a high definition test pattern disc to use, but video quality on real-world material appeared unchanged by the switcher – Ratatouille on Blu-ray from a PS3 looked just as ridiculously good direct from the PS3 or routed through the Accell. The PS3 and my Panasonic projector often have minor handshaking dropouts when loading a disc and making its way to the menus; the instance of dropouts did seem to increase after adding the switch in the chain, but if so, the difference was minor and – honest – I may have imagined the increase. The switch automatically changes the input to whichever source device is on. Since my TiVo HD is always on, I couldn’t test that fully, but it did default to that input. Accell claims that the switch mirrors the source on both outputs (like Denon’s scheme above), but I didn’t find that always worked in the real world – I could usually only lock onto the source on one display at a time. It’s possible that there was a problem in the switch, but I’m willing to bet that it’s a glitch in the way my TV and projector handle HDMI signals or the difference in resolution between the displays (a Panasonic 720p plasma and a Panasonic 1080p LCD projector). For my intended purpose – watching either the TV or the projector, but not both at the same time – the Accell switch worked perfectly.

A small infrared remote control is included that has discrete buttons – and discrete IR codes for those who want to copy them into a universal remote control – for each individual input, power on, power off, and a toggle switch for selecting between outputs A and B. In a really nice touch, an infrared receiver cable is also included so that the switcher can be secluded behind a cabinet. The switch contains a signal booster for longer HDMI cable runs up to 82ft; I was not able to test this, as my longest run is 25ft. The switch is designed for HDMI version 1.2. HDMI version 1.3 is the latest and greatest iteration of the standard, and adds things like Deep Color which have not been implemented yet in any source material. For most people, there is little practical difference between HDMI 1.3 and 1.2, but if complete futureproofing is an absolute requirement, this iteration of the 4x2 Switch isn’t for you.

Accell isn’t the only 4x2 HDMI switcher on the market; Gefen makes one for $549 that has some additional functionality, such as splitting out the audio signal to a coax output, that could be extremely useful in certain setups. And budget cable outfit monoprice.com has a budget model with HDMI 1.3a compatibility for just $89 – I’ll be testing that one next. For $89, if it just turns on I’ll be impressed.

-avi

Come on in, the 1080p water's fine!

Evan Powell over at ProjectorCentral has a short article on the massive drop in 1080p projector prices and he notes that this, plus the end of the format war, makes now an ideal time to buy.

He's not kidding. In some cases prices on models introduced just four months ago have fallen by hundreds of dollars as newer models have hit the market. The price on the Panasonic PT-AE2000U I bought at the end of the year seems to be holding steady; I'm not sure whether that means there is higher demand for this model -- certainly a possibility -- or that Panasonic just isn't reacting to changing market conditions quickly enough. I'm used to seeing this sort of competitive pricing dynamic in cellphones (<--pardon the shameless plug), but not in home theater.

CES 2008: High Def Disc Format War Over, Thin TVs, and Steve Jobs

Well, I'm back from Las Vegas, but my body is still on the wrong time zone. There were three main stories at this year's CES:

1. The death of HD-DVD. With Warner’s announcement that it will no longer sell HD-DVD movies, the high definition disc format war is effectively over with Blu-ray as the victor. Toshiba (one of HD-DVD’s primary backers) offered a weak reaction, saying that it is stunned and upset, but that HD-DVD has been declared dead before. That's true, but formats are only as valuable as the content that they are tied to. With Warner gone, only Paramount and New Line are left in the HD-DVD camp, and even they will probably switch to Blu-ray before the end of the year, once the rumored exclusivity period of their arrangement with HD-DVD is up.
2. Super-thin flat panel displays. Several vendor showed incredibly thin flat panel televisions – as thin as 9mm (a prototype) to 1.7” (likely to become a production model shortly). You might wonder whether there is a market for slightly thinner displays – after all, how much thinner is 1.7” than a 4” plasma or LCD today? The answer is, a lot thinner. The difference is that a 4” display is still a box you’re putting on the wall, while anything under 2” approaches being part of the wall itself. The prototypes on display looked incredibly good, and will be extremely exciting to interior designers. I expect that super thin displays will make up a significant premium segment of the market in just 1 – 2 years time. The phenomenon of super-large flat panel displays, on the other hand, has limited appeal beyond the super-wealthy, even as prices inevitably drop from the “if you have to ask” range, simply because an 11 foot long flat panel literally cannot fit around a typical home’s layout to the installation site.
3. Waiting for MacWorld. Last year, CES was completely upstaged by the iPhone at MacWorld the same week. This year, MacWorld is back to the week after CES, but the shadow of Cupertino was palpably draped over Las Vegas this year as well. I have no inside information on what Apple will announce next week, but Apple’s head of PR promised me that Apple’s announcements at MacWorld will be better than anything I’d see at CES. I believe him, and I suspect the rest of the industry does, too.

Other CES trends:

• Several systems for moving HD content wirelessly were shown, either as part of the television purchase or as a separate accessory. While wired connections will continue to be the bulk of the market for some time, the availability of wireless options is extremely welcome as a solution to specific installation challenges.
• Home storage was another big theme, with solutions that ranged from simple connected hard drives up to enterprise-class servers with friendly user interfaces.
• The industry continues to introduce boxes that let you watch PC content on TV. Yawn.
• GPS was everywhere at the show, particularly from vendors who either are new to the U.S. market or new to the market generally. Prices are already dropping due to the competition (and ready availability of the components needed to become a PND competitor), and it will be extremely difficult for all these vendors to make money, even if they can avoid being cannibalized by GPS on cellphones. These issues and more were discussed during my CES Education session on GPS Monday afternoon. The panel was well attended and the discussion could have easily continued for an additional hour or two beyond the time allotted.

Due to a hyper travel schedule I will not be in SFO for MacWorld next week, however I will be covering announcements made at the show from afar. Should be interesting!

-avi