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Vista Blurs High-Def

If microsoft has its way, your digital entertainment options will be served via a PC in your living room. To fully enjoy the benefits of digital content, however, you may have to buy new hardware.

When Windows Vista appears later this year, it will allow playback of HD video--but it may do so only if your monitor or TV supports Intel's High-bandwidth Digital Content Protection scheme. Without a DVI or HDMI port that handles HDCP, your aging 42-inch plasma set could display the film at lower DVD-quality resolution, or not play it at all (for details, see "Most Monitors Won't Play HD Video,"). The same will likely be true of Blu-ray and HD DVD recorders, though final specs of the content protection scheme for those two formats were not available at press time.

The Vista DRM scheme puts playback decisions in the hands of content providers. But showing the content at a lower resolution is more likely than shutting it off, says Marcus Matthias, a product manager in Microsoft's Digital Media Division. "Frankly, we'd have zero interest in doing all this if it wasn't something [that content owners that Microsoft partners with] were interested in having," he admits.

Although HDTVs sold today typically support digital copy protection via their HDMI ports, many older models do not. According to Rhoda Alexander, director of monitor research for market research firm iSuppli in San Jose, California, the percentage of HDCP-compatible computer monitors was "in the low single digits" when she surveyed the market in 2005.

HDCP will make it more difficult for consumers to share HD content--and will keep them from making legal "fair use" copies--by preventing the capture of HD programs by unlicensed devices. But like most DRM schemes, it's unlikely to stop determined pirates. In 2001 researchers at Carnegie Mellon University uncovered several flaws in the scheme, long before it was developed for commercial purposes. German electronics company Spatz is already selling devices that it claims convert HDCP signals for non-HDCP displays.

Olin Sibert, a longtime DRM developer, believes that Vista's DRM, while technologically impressive, is unlikely to be effective in the long run. "Content that can be experienced can also be copied. You can place obstacles in the way, but you can't ensure content will never be copied."