US PATENT SUBCLASS 348 / 354
.~.~.~.~ By analyzing high frequency component

Current as of: June, 1999
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348 /   HD   TELEVISION

207  DF  CAMERA, SYSTEM AND DETAIL {19}
335  DF  .~ Optics {12}
345  DF  .~.~ Focus control {5}
349  DF  .~.~.~ Using image signal {5}
354.~.~.~.~ By analyzing high frequency component {2}
355  DF  .~.~.~.~.~> Plural high frequencies
356  DF  .~.~.~.~.~> Detection of peak or slope of image signal

DEFINITION

Classification: 348/354

By analyzing high frequency component:

(under subclass 349) Subject matter including a device for evaluating characteristics of a video signal upper frequency component for determining the focus condition.