11.   ABC and CBS have said they will be broadcasting dozens of programs each week in high definition this season.

12.   But a digital broadcast does not have to be high definition.

13.   But that effort comes just as CD sound, driven largely by a technology called HDCD, for high definition compatible digital, is finally approaching audiophile quality.

14.   But only a few programs are broadcast in high definition because of a logjam by broadcasters and manufacturers.

15.   By the time basic television broadcasts are in high definition a few years down the road, DVD players may also be capable of high-definition performance.

16.   CBSaired several football games in high definition, the last in early January.

17.   Digital cameras, high definition televisions, DVD players and other recently introduced categories are becoming affordable to the typical middle class family.

18.   Dish Network also provides a Showtime feed that shows a few high definition movies a day.

19.   Even though CBS and ABC have somewhat different formats for high definition, any set that a viewer purchases will be able to transmit shows of either network.

20.   For televisions, that means components or adapters that will accept high definition TV, or HDTV.