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Verizon uses Super Bowl to show off LTE broadcast video

A demonstration the NFL Network broadcast live to a Galaxy Note 3 via the Verizon Wireless network.

(Credit:Roger Cheng/CNET)

Verizon Wireless is testing out its cellular video service, called multicast, and will broadcast the Super Bowl over its network on Sunday.

The only catch is the trial is extremely limited -- in fact limited to a single room inside Verizon's Power House, a temporary installation set up in Manhattan's Bryant Park.

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It's an extremely small scale test, but gives you a glimpse into the kind of service Verizon wants to offer later this year. As all of the US carriers begin to approach parity with their LTE networks, companies such as Verizon are looking for these kinds of services to set themselves apart, while creating a potential new revenue stream.

CNET got a chance to check out the service, and the video quality does look pretty good. The "multicast LTE" room featured a handful of Samsung Galaxy Note 3 units tethered to a flat-screen television and already getting feeds from the NFL Network. You could watch a single live feed, or switch to four screens that juggled the live feed with three other on-demand videos.

Multicast LTE, as its name implies, is a service that rides over the LTE network, pushing out the same video feed to multiple devices, rather than a single phone or tablet. Because its a single, one-way broadcast feed, it is far more efficient than the current method of delivering video, which is sent to a single person based on their request. Because people aren't constantly pinging the network for different streams of video, Verizon could see some of the congested lifted on its network.

Because it is a single feed, there is higher picture quality, lower latency, and no buffering when the video is loaded up.

The service is still a little ways away. Parissa Pandkhou, director of mobile video delivery for Verizon Wireless, said she expects the work on the network upgrades, which includes a mix of software and physical boxes, to conclude around the third quarter. It's still unclear when the service would actually be rolled out to subscribers.

Verizon is working on signing up media partners, although it has at least one: the NFL's new digital network, NFL Now, will in some way incorporate multicast to Verizon customers sometime after it launches in the summer. That deal's not a huge surprise, with Verizon a key sponsor of the NFL and a marquee media partner for NFL Now.

Car companies have approached Verizon about incorporating a potential dongle into their vehicles that would be able to pick up multicast signals. Media companies have also checked out the technology.

There are also a few technical hurdles. Not every phone is compatible with the service, most notably the iPhone. Pandkhou noted that multicast uses a standards-based technology that would allow all vendors to incorporate software that's compatible with the service. She expressed confidence that a broad array of devices would be compatible at launch, noting Verizon was talking to every vendor, including Apple.

Think of multicast as the next generation of several failed attempts to bring broadcast video to the wireless world. Think Qualcomm's MediaFlo or the broadcasters' little-used service, Dyle, the notion of live video on your cellphone has generally been rejected by consumers. Verizon thinks things will be different this time, with more devices and a higher level of video quality hopefully attracting users. Beyond "live" broadcasts, multicast can also handle on-demand videos that are already being streamed.

The network efficiency angle might also be appealing, as the video service eats up a lot less data than traditional mobile streaming, critical at a time when customers are watching how much data they consumer. There's a chance that the data may not count against a customer's allotment at all, depending on how the business agreements are structured with media partners.

Verizon's Power House

Paper and the craft of securing Facebook's future

A new dawn. Hacker Square at Facebook's Menlo Park, Calif., campus.

(Credit:Facebook)

Facebook will enter its second decade by starting over entirely.

The new beginning comes courtesy of Paper, a standalone iPhone application for reading and writing the news, which will launch February 3, the eve of Facebook's 10-year anniversary.

Metaphorically, Paper is the 2014 version of Facebook, unencumbered by the rigid walls erected over the past 10 years, yet supported by the foundation of 1.23 billion people.

More literally, Paper presents News Feed's standbys -- photos, videos, and articles -- in new formats designed for enjoyment on smartphones. The app also comes with newspaperlike sections such as sports, entertainment, food, and even cute (for adorable animal pics) that you can add to your personalized zine to gather news on the topics you care about.

Back to the lab
The app is the first of several singular applications to be developed and released by Facebook Creative Labs. The unit is a startup-like group separated from the operational strictures that come along with a company of Facebook's size. The team has been granted, by none other than CEO Mark Zuckerberg, the freedom to do its own thing so that people like Product Manager Michael Reckhow and Product Designer Mike Matas can come up with radically different ideas.

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The team checks in with Zuckerberg for guidance, of course, but the group mostly answers to its individual creative whims.

The company's 10-year anniversary seems as good an opportunity as any to trot out Creative Labs and set the tone for what's to come in the years ahead.

Recomposing Facebook With Paper, Facebook has deconstructed the network into little bits and put a few of the pieces back together to make something else entirely. As a standalone app, the ad-free Paper can only hurt Facebook if it becomes so popular that people dramatically cut back on their usage of the main app, where Facebook needs a large audience to make money from ads.

The reconstruction effort started with cosmetic surgery to the tools that pump blood into Facebook's most-viewed body part: News Feed. News Feed is the source for all that is happening in your network, but it's not exactly designed for elegant storytelling.

"

What headphone buyers need to know, Part 1

On-Ear Sennheiser Momentum (left), over-the ear Beyerdynamic T 90 (right)

(Credit:Steve Guttenberg/CNET)

I get a lot of reader emails seeking recommendations for headphones, and sometimes they'll ask about two very different types of designs. For example, "What should I buy, Sennheiser's on-ear Momentum or the AKG K 712 'phones?" In that case there's no obvious "better" headphone, because they are two radically different types of headphones. The Sennheiser is an on-ear, closed-back design, and the AKG K 712 is a much larger over-the-ear, open-back headphone. It's like asking "What's better, a Ford F-150 Raptor truck or a Porsche 911 Turbo sports car? They both go fast, but serve very different kinds of drivers. "Best," isn't the right question, it's more about what's the right one for you.

There are many types of headphones, and if you understand the pros and cons of each before you go shopping you'll make a more informed buying decision. Closed- vs. open-back headphones for example, serve different needs. To get a handle on how they differ I spoke with two engineers, Sennheiser's Axel Grell and AKG's Philipp Schuster, and they were a big help. Today I'll cover on- and over-the-ear headphones, tomorrow we'll look at open- and closed-back 'phones.

On-ear 'phones' ear pads rest on the outer ear; over-the-ear models' have larger ear pads that encircle the ears. Grell said that over-the-ear headphones produce more spacious and natural imaging than on-ear models. That's because over-the-ear headphones have larger ear cups which position the drivers further away from the ears, so more sound reflects off the folds of the outer ear. Which is closer to the way we hear sound from speakers. On-ears focus sound directly into the ear canal, so it's a less "natural" way to hear stereo sound. Over-the-ear headphones sound more spacious and expansive than on-ear headphones.

When it comes to bass power Grell and Schuster saw no clear cut advantage for either design type. Bass oomph depends on the specifics of each design, and how effectively the headphones' ear pads seal. If you wear glasses their side temples may adversely affect over-the-ear headphones' seal, and bass response will suffer. Glasses pose less of a problem for on-ear designs. Schuster reminded me that everyone's heads and ears are shaped differently, so the ability of a given headphone to achieve a tight seal varies from person to person.

Most on-ears are optimized for on-the-go users, so their designers focus on making smaller headphones, and that sometimes requires the use of smaller drivers. That approach will limit the amount of bass the headphone can produce. So with headphones size does matter, and a preference for smaller size trumps comfort and sound quality for most buyers.

Over-the-ear headphones are more comfortable to wear for extended periods of time, because instead of having ear pads pressing directly on the outer ears, over-the-ears' pads surround the outer ear. On-ears' "clamping" against the ears' pressure tends to be higher, and they will probably make your ears hotter and sweatier than over-the-ear models. Of course, the specifics of each headphone's design come into play, but I almost always find over-the-ear models more comfortable.

Over-the-ears' biggest drawback is size, they're larger than on-ear headphones. I like the larger soundstage over-the-ear headphones produce, but some listeners prefer the more immediate/present sound of on-ears. Schuster recommends over-the-ears for sound quality and comfort, but over-the-ears are less portable.

Most on-ear headphones are closed-back designs, but over-the-ear models can be either open- or closed-back. I'll cover their pros and cons on tomorrow's blog. I wrote about how ear buds and in-ear headphones differ on a previous blog.

Topics: Tips, Audio/MP3, iPod, High-End Audio, Sound Tags: over the ear headphones, How-to, circumaural headphones supraaural headphones, how to buy headphones, Headphones, on-ear headphones

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Newly appointed Vice Chancellor Professor Dr. Md. Aminul Haque Bhuyan pays homage to Language Martyrs at Central Shahid Minar at SUST.

Shahjalal University of Science & Technology Search formSearch Newly appointed Vice Chancellor Professor Dr. Md. Aminul Haque Bhuyan pays homage to Language Martyrs at Central Shahid Minar at SUST.published by administrator on Tue, 2013-09-17 09:58

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