US PATENT SUBCLASS 348 / 449
.~.~ Including nonstandard signal detection


Current as of: June, 1999
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348 /   HD   TELEVISION

441  DF  FORMAT CONVERSION {9}
448  DF  .~ Line doublers type (e.g., interlace to progressive IDTV type) {3}
449.~.~ Including nonstandard signal detection


DEFINITION

Classification: 348/449

Including nonstandard signal detection:

(under subclass 448) Subject matter including a means for determining whether the signal has a fixed line period (broadcast) or a variable line period (tape machine).

(1) Note. These systems normally switch operating modes using the previous field for standard signal and line interpolation for nonstandard signals.