US PATENT SUBCLASS 348 / 454
.~.~ PAL to NTSC or vice versa

Current as of: June, 1999
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348 /   HD   TELEVISION

441  DF  FORMAT CONVERSION {9}
453  DF  .~ Specified chrominance processing {3}
454.~.~ PAL to NTSC or vice versa

DEFINITION

Classification: 348/454

PAL to NTSC or vice versa:

(under subclass 453) Subject matter wherein a chrominance signal having the phase of one of the quadrature components inverted in alternating lines is converted into a quadrature modulated chrominance signal without phase inversion or vice versa.