Just don't expect many people actually to see the HDTV pictures.

See more HDTV pictures.

While three-chip systems can produce very good HDTV pictures, they are difficult to align precisely and are expensive.

HDTV pictures would have about 1,100 lines and produce pictures that would be twice as clear.

BACK in the dark ages of high-definition television - about four years ago - HDTV pictures suffered in quality.

The wrist-TV-and-eyeglasses combination could conceivably float the equivalent of a 60-inch HDTV picture in front of the wearer's eyes.

By one estimate, an HDTV picture with sound would require 1.6 billion bits of data per second.

Even cheap televisions are now so good that the somewhat sharper HDTV pictures are simply not worth the high cost.

The HDTV picture would also be one-third wider than today's image area, with a width to height ratio of 5.3 to 3, the same as motion pictures.

HDTV pictures would have about 1,100 lines, doubling the picture quality.