Data modulating method and apparatus, data demodulating method and apparatus, and code arranging method
December 12, 2025. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesDigital audio satellite transmission system Method and apparatus for asymmetrical RLL coding Method of secondary modulation of a train of recorded data Run length limited encoding/decoding system for low power disk drives Coding/decoding method and apparatus therefor Digital multiplex transmission system Maximum-likelihood symbol detection for RLL-coded data Method and apparatus for reducing DC component of RLL codes Video signal scrambling apparatus Single merging bit DC-suppressed run length limited coding InventorsAssigneeApplicationNo. 11298827 filed on 12/12/2005US Classes:341/102, To or from "N" out of "M" codes341/58, To or from minimum d.c. level codes341/59, To or from run length limited codes370/326, Combining or distributing information via time channels360/40, In specific code or form380/216, Image data converted to digital before modification380/222, Including phase inversion of scan line information341/68, To or from NRZ (nonreturn-to-zero) codes375/152, Matched-filter-type receiver375/219, TRANSCEIVERS375/240, BANDWIDTH REDUCTION OR EXPANSION375/140, Direct sequence369/47.31, Using program or address signal714/769, Dynamic data storage375/295, TRANSMITTERS714/715Test pattern with comparisonExaminersPrimary: Nguyen, LinhAttorney, Agent or FirmForeign Patent References
International ClassH03M 7/20AbstractIn a data demodulating method and apparatus, and a code arranging method, a multiplexer multiplexes an input data stream divided by a predetermined length into a plurality of types of pseudo random data streams using multiplexed information of predetermined bits by applying a predetermined multiplexing method to each of the pseudo random data streams. An encoder RLL-modulates the plurality of types of pseudo random data streams to create a modulated code stream including a minimum of DC components. The multiplexer generates the random data streams by inconsecutively scrambling the input data stream using the multiplexed information. The encoder weak DC-free RLL-modulates each of the multiplexed data streams without using a DC control sub code conversion table to which additional bits are added and provides a code stream including a minimum of DC components among multiplexed, RLL-modulated code streams.Other References
Field of SearchTo or from minimum d.c. level codesTo or from run length limited codes To or from variable length codes To or from "N" out of "M" codes "N" out of "M" to "X" out of "Y" Using program or address signal Having specific code or form generation or regeneration processing Combining or distributing information via time channels Direct sequence Matched-filter-type receiver BANDWIDTH REDUCTION OR EXPANSION Length coding Image data converted to digital before modification Dynamic data storage Viterbi decoding In specific code or form | |
