US PATENT SUBCLASS 348 / 426
.~ Format type (e.g., HDTV or EDTV)

Current as of: June, 1999
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348 /   HD   TELEVISION

384  DF  BANDWIDTH REDUCTION SYSTEM {7}
426.~ Format type (e.g., HDTV or EDTV) {3}
427  DF  .~.~> Including frequency folding (e.g., subsampling) {3}
432  DF  .~.~> Added video information in standard channel format (e.g., compatible EDTV) {3}
437  DF  .~.~> Individual processing of different parts of image frequency band (e.g., sum and difference, high band/low band)

DEFINITION

Classification: 348/426

Format type (e.g., HDTV or EDTV):

(under subclass 384) Subject matter including systems that produce a narrow band signal, which resembles a conventional TV signal, from a broadband source and allow reconstruction of a broadband display.

(1) Note. Included herein are systems in which additional video information is transmitted by using a subcarrier, sampling, additional modulation of the picture carrier (e.g., quadrature), undulatory scanning, line number conversion, or placing an extra video in normal blanking areas.