US PATENT SUBCLASS 369 / 107
.~.~ Ground noise suppression, signal envelope, or plural optical modulation

Current as of: June, 1999
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369 /   HD   DYNAMIC INFORMATION STORAGE OR RETRIEVAL

99  DF  SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM {4}
100  DF  .~ Radiation beam modification of or by storage medium {20}
107.~.~ Ground noise suppression, signal envelope, or plural optical modulation

DEFINITION

Classification: 369/107

Ground noise suppression, signal envelope, or plural optical modulation:

(under subclass 100) Subject matter wherein provision is made to suppress spurious signals caused by graininess of the film and emulsion; or the storage medium has an additional signal representative of the average signal level, or has a plurality of characteristics varied.