While 3D adoption will grow, there are some problems such as having to wear silly [...]]]> The Consumer Electronics Shows (CES) just wrapped up in Las Vegas and one of the main themes was 3D video coming to home televisions. Along with this, the big movie Avatar is being shown in many locations in 3D.

While 3D adoption will grow, there are some problems such as having to wear silly glasses and the “depth of field”.

Depth of Field Problem

About 20% of the people I know who saw Avatar in 3D said that they felt nauseous or got a headache. This is primary due to a “depth of field” problem.

When you look at a close up object in the real world, you focus on it and things in the background are out of focus. You then look at something far away and then can focus on that clearly.

In 2D movies, the camera focuses on what is important and other items are out of focus, especially when there is a wide depth of field.

In 3D movies, our eyes expect to be able to look at an out-of-focus area and have it come into focus, just like in real life. But if it was shot out of focus, this is impossible. Further, the shallower the depth of field (meaning the more that the foreground and background are both in focus) the more cartoonish a video can look. This is a reason that cartoons, because they have no depth of field, work great with 3D.

An article at Shadow Locked explains How to avoid getting a 3D headache while watching Avatar. You have to look at what is in focus. See picture:

3D Does Work in Many Cases

For cartoons and sports, we do not expect to see a depth of field. And typically James Cameron shot Avatar with little depth of field. But, to the extent that depth of field is an important tool for movies, it will limit adoption of 3D movies for many people.

Screen size. For the ultimate large screen (100+ inch) theater experience, a front projector is the only solution under $80,000. There are large LCD, Plasma, and rear-projector televisions, but none over 100 inches that can practically be purchased or fit through your door.

Why you should not [...]]]> Why you should buy a home theater projector

Screen size. For the ultimate large screen (100+ inch) theater experience, a front projector is the only solution under $80,000. There are large LCD, Plasma, and rear-projector televisions, but none over 100 inches that can practically be purchased or fit through your door.

Why you should not buy a projector

• Lighting. Ambient light from windows and lamps immediately washes out a projector’s colors and dark details. To have a proper picture with correct colors and darks, you need to be able to completely control the light in that room, for example, by having heavy drapes on the windows. This creates a theater environment but can be impractical for casual viewing.
• Installation. Projectors need to be mounted properly and focused so that there are no distortions. A screen also needs to be installed for best picture quality.
• Maintenance. Projector bulbs need to be replaced every year or two, depending on usage and bulb life. Some projectors also need to be vacuumed for dust periodically.
• Noise. Fan noise can be loud and irritating on some models.

Researching a projector

• ProjectorReviews.com by Art Feierman. Art has by far the most in-depth reviews of home theater projectors. People in forums anxiously await his reviews and refer to him when making arguments for projectors. Manufacturers sometimes send him test units prior to producing projectors. His daughter helps with the photographs and his friend Mike helps with calibrations.
  
• AVS Forum’s Projector’s Under $3000 page. As with other home theater gear, AVS Forum has intelligent discussions of projectors by shoppers and owners of the equipment. They also have forums on projector screens and making your own DIY screens to save money.
  
• Projector Central. Not as detailed as ProjectorReviews.com, but another resource for reviews.

Some things to consider

• 1080P versus 720P resolution. Three years ago, 720P resolution was much cheaper than 1080P. But as with LCD TVs, projector manufacturers are putting all their effort into 1080P which can be purchased now for $1000.
• Brightness. Ambient light in the room can be somewhat compensated for by a brighter projector.
• Noise. If you are sitting close to the projector, you will want one that is relatively quiet, below 30db.
• Bulb replacement. Look at replacement bulb costs as well as how many hours of life you can expect for a bulb.

My current favorite

A TV is a personal choice depending on your needs, room environment, and budget. My favorite at the moment is the Epson Home Cinema 8100 (see a review at ProjectorReviews.com) because it has:

• Brightness while maintaining good colors. Many other projector’s brightest mode will create much poorer colors.
• Shadow detail better than cheaper 1080P projectors.
• Quietness. 27db or less. Cheaper 1080P projectors such as the Optima HD20 and Vivitek 1800 are significantly louder. Panasonic makes quieter projectors, but they are not as bright as this Epson.
• Good warranty and long bulb life. Epson is easy to work with if you need a repair.
  

Runner-up

I also recommend the Mitsubishi HC3800. It uses DLP technology instead of the Epson’s LCD, which leads to these trade-off’s: Pros: great colors, smaller body. Cons: louder fan, minor rainbow effect which some people notice and some don’t (caused by the DLP’s spinning color wheel).

Where to buy

As with other electronics, there are better deals if you shop online instead of going to Best Buy. I usually start at Amazon, but there are many online stores that will provide competitive pricing.

But it can be tricky to get antenna placement correct.

Channel Spreadsheet

I use a spreadsheet that I create from antennaweb.org data for installing HD OTA [...]]]> Over-the-air (OTA) high definition television is great. It provides free high definition programming that is higher bitrate (meaning higher quality) than high definition TV from cable, fios, or satellite.

But it can be tricky to get antenna placement correct.

Channel Spreadsheet

I use a spreadsheet that I create from antennaweb.org data for installing HD OTA TV for DC Metro area clients.

This allows you to write down signal strength numbers on all your channels using different configurations:

• different antennas
• different locations
• amplification on/off

Generally a higher placement for the antenna is best.  For the Washington D.C. channel lineup, I have found the Winegard SS-3000 Amplified Indoor UHF/VHF Antenna to work best in most situations, at least when located close to the city. Amplification can help for areas with weaker signals but should not be done if you already have a strong signal.

There is typically a trade-off in choosing the best configuration. A particular setup might favor one channel and hurt another because channels use various tower locations and frequencies.

At Tech DC we have been helping a few customers, especially those who have extra TVs or who [...]]]> The over-the-air free TV that is available with an antenna has been available in both digital and analog formats during the transition to digital TV. Midnight tomorrow night, June 12th, the analog signal will be shut off.

At Tech DC we have been helping a few customers, especially those who have extra TVs or who live in rural areas not served by cable, to switch to Digital TV. See Tech DC’s 7 Misconceptions about Over-the-air Digital TV. And remember that if you do get TV through analog over-the-air transmissions, then you can request $40 coupons toward a digital converter box.

From The Washington Post:

Almost 3 million U.S. homes — 60,000 households in the Washington area alone — could wake up Saturday to a blank TV screen.

By midnight tomorrow, all of the nation’s full-powered TV stations will shut off the analog signals that brought the iconic shows “I Love Lucy” and the “Cosby Show” to millions of living rooms, marking the biggest change in television viewing since the advent of Technicolor. In their place, broadcasters will air a new breed of digital broadcasts intended to bring crisper pictures and sound to shows like “American Idol.”

At the end of this long-awaited and troubled transition, the government will have made $20 billion from the sale of the old

analog airwaves, the telecommunications industry will be able to offer brand-new, high-speed wireless services, and public-safety officials will get access to airwaves for a new nationwide communications network.

But people have been left to deal with some unsatisfactory results of the poorly managed, government-mandated transition. The education campaign was uncoordinated, a federal program to help people pay for converter boxes ran out of money, and many were not informed that they might need additional equipment to receive TV service.

Those most at risk of losing programming — seniors, non-English speakers, low-income viewers and rural residents — are among the more than 14 million households that rely heavily on over-the-air signals to receive critical public-safety alerts, news and weather reports.

“The problems for those people will be much greater than the forecast,” John Carey, a professor of communications and media management at Fordham University.

Older analog sets that rely on rabbit-ear antennas will need a converter box, which costs $50 to $80. TV sets with digital tuners will receive broadcasts, but viewers will need to adjust antennas and in some cases install more powerful ones.

For Maria Rubio, 67, of Langley Park, the TV has been a constant companion since her husband died two years ago. She watches five to six hours of television a day with the dial fixed on Spanish-language talk shows and telenovelas on Univision. She does not speak much English.

Rubio is worried that her pastime may disappear come Saturday. A neighbor’s teenage son hooked up a converter box, which she bought with a government-sponsored coupon for a $40 discount, to her 16-year-old TV. But she may also need a new, stronger antenna for reception.

That’s because digital signals do not travel as far or hold up to interference as well as analog. Analog signals will show a snowy picture for viewers on the edge of a station’s coverage area. But with digital signals, even the smallest obstruction — a tall tree in the yard or an airplane flying overhead — can cause the picture to freeze and sometimes disappear altogether.

Rubio said she cannot afford to buy a new antenna. “We almost could not pay for that [converter] box,” she said.

Much of the government’s education campaign focused on just getting consumers to buy converters boxes. Critics say officials waited too long to tell viewers that they will likely need a new antenna and will have to scan frequently for channels.

More than one-third of the callers to the Federal Communications Commission’s DTV call centers have cited reception problems.

The twice-delayed transition to all-digital television has been in the works for more than two decades and, when all is said and done, will have cost nearly $4 billion.

Congress had mandated that all full-power stations convert to digital signals in 2006. But the switch was pushed back to Feb. 17 because of consumer confusion and lack of equipment.

Two weeks before that deadline, Congress voted to again postpone the switch, this time to June 12, after a $1.5 billion program ran short of funds to distribute $40-off coupons to offset the cost of converter boxes. Ultimately $650 million in stimulus funds was allocated to the preparation efforts.

Nearly 800 stations, mostly in smaller markets, went ahead with the transition in February, and six more will make the change by today. That leaves 974 stations in major cities to make the switch tomorrow. Stations will be shutting off analog signals throughout the day tomorrow. In the Washington area, the CBS and ABC affiliates plan to do so in the morning, while the rest plan to make the switch between noon and midnight.

Broadcasters hope the new digital programs and improved channel offerings will lure back some viewers who subscribe to cable and satellite services. Less than 15 percent of U.S. viewers rely on free over-the-air television.

But analysts say the digital transition has instead prompted a number of people to switch to a pay-TV service to avoid the hassles of upgrading TV sets.

About 5 percent of U.S. households have subscribed to a cable or satellite service in the past year, according to a survey conducted by research firm Knowledge Networks. Jeffrey Wlodarczak, managing director of Hudson Square Research in New York, estimates that the pay-TV industry will gain nearly a half million customers in the switch.

For example, Time Warner Cable, the nation’s second-largest cable company, said it added 80,000 over-the-air customers in the first three months of the year. Satellite provider DirecTV said it signed up 50,000 to 100,000 over-the-air viewers.

“It has clearly offset the losses for companies that were already under economic pressure,” Wlodarczak said.

Sales of digital TV sets have tripled in three years, and people are expected to buy a record 34.5 million sets this year, according to the Consumer Electronics Association.

A growing number of households, however, are not watching TV the way they used to. Many now access programming through Internet-based platforms such as Hulu.com, which hosts a large catalog of new and classic shows.

Ben and Katie Hallen of the District use a Roku digital video player to stream movies and TV shows from Netflix, iTunes and Amazon.com.

“Cable was optional for us, but Internet was not,” said Ben Hallen, 30, an assistant professor at the University of Maryland. “This way we can watch things on our own schedule. I don’t feel like we’re missing out on anything.”

But about 30 percent of U.S. households are not online, and 80 percent of the nearly 14 million homes that rely on over-the-air broadcasts have never logged onto the Internet, Carey said.

Despite the inconveniences, economic experts say repurposing the old analog airwaves for wireless broadband services and communications networks for emergency responders is the most prudent use of resources.

Wireless companies have spent $20 billion for the rights to those airwaves, and federal officials hope it will help expand the reach of high-speed Internet to all corners of the country.