compression

Are Blu-ray movies too loud?

Admit it: you'd love to watch movies at home that never get too loud or too quiet. You'd never have to lunge for the remote when the villain's plane crashes, to turn the sound down. We want movies that always have the same volume, like music, where the volume never changes. We like it that way, right? Why should movies be any more dynamic than music?

Now, sure, most receivers and sound bars have some sort of "Night Mode" scheme to compress movies' soft-to-loud volume shifts. Some receivers include more sophisticated volume-leveling processors such as … Read more

It's Dynamic Range Day, turn it up

Dynamic Range Day comes to us from Turn Me Up, a non-profit music organization working with artists and recording professionals who are promoting more dynamic recordings. Most contemporary recordings are anything but; they are mixed to sound loud all the time.

I know that might seem ridiculous, every music player--radio, iPod, hi-fi, or home theater system--has a volume control. You can listen quietly or turn it way up, but do you realize that every recording--every album, video, movie, or TV show--has been mixed with a fixed relative loudness level? Many movies have extremely wide soft-to-loud dynamic range, but nowadays music … Read more

Qualcomm shows horsepower of next-gen H.265 video

BARCELONA, Spain--H.264 is today's leader when it comes to mainstream video encoding technologies, but it will have to share the stage in 2013 with a successor called H.265 that can squeeze a video into nearly half the file size.

H.264, also known as the Advanced Video Codec (AVC), defines how a video can be compressed for reduced storage requirements and--very importantly given the online video explosion--for streaming across networks. H.265, also called High Efficiency Video Codec (HEVC), uses new techniques to compress video even more.

Qualcomm, a San Diego-based chipmaker that's on the international standards group developing H.265, … Read more

Obama shoots marshmallow in the name of science

Check out this video of a high-powered marshmallow cannon fired by President Obama and eighth grader Joey Hudy at the White House.

The second White House Science Fair yesterday gave 100 student winners of science, technology, engineering, and math (STEM) competitions from across 45 states the opportunity to show off neat science projects to the president, Bill Nye the Science Guy, and several well-respected educators and leaders from the science and engineering community.

Perhaps the viral star of the expose is 14-year-old Hudy's "Extreme Marshmallow Cannon," a compressed air-powered weapon that can launch the tasty confections more than 170 feet. The president helped Hudy pump the cannon to 30psi, and then shot the marshmallow across the State Dining Room. … Read more

Is music too loud?

In real life a folk singer isn't as loud as a rock band, but once her recording is compressed she might be as loud as Metallica. Of course, with most types of music the sound isn't turned up to 11 all of the time.

There are quiet passages, and only the loudest parts, like the hardest drum hits, are really loud. We have the technology to accurately record music, but few record companies choose to make lifelike recordings.

The Loudness Wars refers to mixing and mastering techniques that squash music's natural soft-to-loud dynamics. Obviously, you can control … Read more

Windows compression utility made just for Mac

WinZip for Mac brings one of the oldest names in Windows compression utilities to the Mac, and we think they did it right. Featuring a clean Mac-like interface, WinZip for Mac lets you compress and secure your files for both sharing with others while keeping them away from prying eyes. Using a simple drag-and-drop interface, you can quickly add files to an archive, then compress them in the standard .ZIP format or create .ZIPX files--a format WinZip says is its smallest compression format to date. Both worked great on our test machines and the ability to password protect even just … Read more

CPR site lets you choose and touch chests, guilt-free

OK, I'll come out and admit the blushingly obvious: the above screenshot reveals which chest I chose. But I shouldn't feel guilty, right? I've just learned how to give hands-only CPR!

The American Heart Association's "Hands-Only CPR" campaign is officially in full-force. After issuing new guidelines in October 2010 that, in adults, rapid chest compressions without rescue breathing is the way to go, it threw a lot of weight behind its hands-only campaign, which boasts press releases, catchy YouTube videos, an app, and so on.

According to the new guidelines, a bystander should compress … Read more

A 'cure' for the Loudness Wars: Give us two mixes!

Most of today's music on CD, LP, or download is compressed to sound loud all the time. The engineers, producers, and record labels are afraid not to make music sound as loud as possible.

Dynamic range compression isn't new, it's been used by recording, mixing, and mastering engineers for decades. A little bit of compression is fine, but the unnatural onslaught of dynamically compressed sound obliterates musical nuance, delicacy, and emotional power. Compression's loud-all-the-time nature sucks the life out of music. The overuse of compression has become known as the Loudness War.

Before we go any … Read more

Zip On The Go

For years, 7-Zip has been one of our favorite Windows utilities. We recently looked at 7-Zip Portable, a fully portable version of the freeware file zipper. Like the installed version, it can compress and decompress files and folders in a variety of ways as well as open other file types such as TAR and RAR files. The portable version is small enough to take along with you on a USB drive, iPod, or other portable device. The chief difference with the installed version is the portable version can't be integrated into context menus in Windows.

We installed 7-Zip Portable … Read more

Who needs high-resolution music?

Most of the music people enjoy doesn't sound very good. That's not to say it isn't good music, just that it doesn't sound great. I'm not picking on digital or contemporary music; most of my favorite Motown and Stax soul music from the 1960s and 1970s sounds like crap. Most rock music from any decade sounds cruddy; that's just the way it is.

A lot of today's best bands, including alternative darlings Arcade Fire, make awful-sounding recordings. I'm specifically referring to their Grammy Award-winning "The Suburbs" album from 2010; it'… Read more