AV Glossary

To bitstream or not to bitstream?

For all the dramatic improvements they’ve given us in the picture and sound quality of movie playback in our homes, sometimes it feels like the new high-definition disc formats—both Blu-ray and HD DVD—also make our lives needlessly complicated in some respects. Case in point is the process of getting high-resolution surround sound audio from the disc player to an A/V receiver or processor. Let’s be frank here and admit that, in this regard, things were a lot simpler with standard DVD, where there was far less confusion about the different audio formats and hardware hookup requirements.

Feeding the Beast and Chasing Its Gremlins : A basic guide for harnessing AC power.

There's absolutely nothing worse than putting together an awesome home theater system that's starved for power or buzzing with ground loops. We often take electricity for granted, assuming it will be there when we need it. Unfortunately, that's not always the case. You don't necessarily need an electrician just to connect your audio and video system, but you may need to check out your electrical system before you spend hours, if not days, connecting all your components. The two things you should consider are whether your system is getting enough power and if your components are connected to that power system correctly.

The greatest thing to happen to LCD, ever.

The coolest demo I saw at CEDIA 2007 was a demo I saw at CEDIA 2006. The original demo was at the Planar suite. Dolby now owns the company that was working with Planar, BrightSide Technologies, and the technology shown in these demos has a name—Dolby Vision. The short version is this: Using LEDs, you can dim specific areas of the backlight to go along with what is happening with the video. In other words, you can dim certain areas of the screen, while keeping other areas bright. In the simplest form, picture a split screen with black on one side and white on the other. Local dimming would allow the LEDs on the black side to be off and the LEDs on the white side to be lit. The result is a fantastic, legitimate contrast ratio, along with possible energy savings and a host of other potential benefits. But first, we have to understand the problem before we can talk about this solution.

How a new codec may change DTV as we know it.

MPEG-4 Advanced Video Coding (AVC) is a next-generation video codec (coder/decoder) that's about to change the face of digital television—slimming it down, enabling it to move into narrower channels, and probably changing how it looks. I can almost see your eyes glazing over: Lucy, you got some 'splainin' to do.

Dolby and DTS help renovate high-def DVD digs.

Have you ever heard wine lovers obsess about the bottle? Of course not. True oenophiles care most about what's in the bottle. There, in a nutshell, you have what's most peculiar about the high-definition-DVD format race. All we hear about is the vessel. What about the contents?

In our ongoing run-up to our 10th anniversary in early 2005, Michael Fremer looks at his experiences working on the soundtrack to the groundbreaking movie Tron. This article was first published in our Fall 1997 issue. We've made a few edits to account for changes since then (particularly in the references to laserdiscs!), but MF's description of the creation of an early-1980s soundtrack is as fascinating, interesting, and pertinent as ever. Modern digital techniques have revolutionized the film-sound business, but a good soundtrack is still a good soundtrack.