T was a torrid 111 degrees in Woodland Hills, Calif., the Sunday before Labor Day, and the action at the local air-conditioned electronics store was hot. Scores of people were admiring the large wide-screen high-definition digital television sets, and at least one family was ready to buy.

Jeff Potts, a local contractor, was about to write a check for more than $2,000 for an HDTV set. But after 30 minutes of discussion he abruptly left, exasperated and empty-handed.

Advertisement

"I want to step up to HDTV, but they're telling me I have to have service plans, extended warranties and special expensive cables to make this work," he said. "This is all too much."

Mr. Potts believed he could watch HDTV by using a satellite dish, but he would not have learned how from the confused salesman. Among other things, the salesman told shoppers that a standard DirecTV dish and digital decoder box were all that was needed to receive HDTV pictures, that HDTV programming was not available with an outdoor antenna or from the Dish Network and that the government had mandated that every television sold be an HDTV model. All of those statements were inaccurate.

But the lack of knowledge among sales personnel is not the only thing hampering the government-mandated switch from analog to digital television, a transition that most experts agree is now far behind schedule.

In 1998, the Federal Communications Commission stated that "digital television promises to be one of the most significant developments in television technology since the advent of color television." Digital TV would offer extraordinarily sharp wide-screen images with surround sound and would allow for additional channels and other enhanced services.

By 2006, the government hoped, the switch to digital would be almost complete, and the current analog spectrum would be reclaimed and auctioned off for billions of dollars to telecommunications companies. Consumers would be enjoying the best-quality television service the world had ever seen.

Almost four years after the F.C.C.'s rosy prediction, the transition to digital broadcasting continues at a snail's pace. Despite a deadline of May 1, 2002, for the nation's 1,309 local commercial broadcast stations to begin digital transmission, only 393 have started doing so, the National Association of Broadcasters says. (Another 75 public stations are broadcasting digitally as well.) The rest of the commercial stations have received hardship waivers related to cost, delivery delays or, in the case of New York, the destruction of digital transmitters on Sept. 11 last year.

On the consumer front, the vast majority of the 25 million television sets sold annually are still equipped to handle analog signals only. Just a handful of cable systems currently offer broadcasters' digital and high-definition feeds. Set-top digital decoder boxes, which are required for viewing a digital signal via an antenna or satellite dish, are hard to find and cost more than most standard television sets.

The F.C.C. acknowledges that the transition has been rough. "We're midstream in a boat that some say has leaks," said W. Kenneth Ferree, chief of the commission's media bureau. "We're patching the leaks and trying to get to shore."

Some progress has been made. The Consumer Electronics Association expects just over two million digital-ready sets (which require a decoder to use digital transmissions), fully digital television sets and tuners to be sold this year, and four million in 2003. The amount of HDTV programming has increased, and the cable TV industry seems to be on the verge of offering some HDTV programming in its largest systems.

Yet according to a recent survey by the Cable and Telecommunications Association for Marketing, 32 percent of adults have never heard of HDTV, 56 percent have no idea how to go about receiving it, and 81 percent are unlikely to buy an HDTV set in the next 12 months.

The Technology

In 1996 the government decreed that the nation's broadcasting standard, in use for more than 50 years, would switch to a digital method of transmission. All of the nation's commercial and nonprofit broadcasters would need to purchase digital transmission equipment and broadcast both digital and analog signals for a while until the government decided that their analog feeds would be shut down.

Digital technology meant that broadcasters would be able to transmit a high-definition picture, several standard-definition ones, or enhanced programming like data, news or program guides. Whether standard or high-definition, the digital format would ensure that all transmissions would be picture-perfect, free of ghosts and snow.

The government only decreed a switch to digital broadcasting; it never ordered broadcasters to transmit HDTV signals specifically, and stations are free never to do so. And the switch to digital was mandated for broadcasters only. Digital cable and digital satellite services like DirecTV use compression technologies on conventional analog signals to make more signals available, but do not necessarily improve the quality of the pictures. Subscribing to either does not guarantee you will also receive broadcasters' digital feeds if and when they become available.

But when broadcasters transmit signals digitally over the air, they are vastly improved. With a digital broadcast, the picture is either perfect or, if you are too far away from the signal, nonexistent. Live in a fringe area, and the picture may pop in and out.

"With digital broadcast television, the choice of a lousy picture no longer exists," said Mark Schubin, an industry consultant in New York.

Instead, it's all or nothing. In reception tests from the 64th floor of a New York skyscraper using a rabbit-ears antenna, Mr. Schubin and his colleagues were able to pick up only three of the nine digital stations in the New York area that were then broadcasting.

Such spotty reception is one reason that the Consumer Electronics Association and the National Association of Broadcasters are urging that cable systems be required to carry digital broadcast feeds. These groups also want a rule that digital televisions must be "cable ready" — able to receive digital broadcast signals via cable without the need for a set-top box.