Location dependent maximum transition run length code with alternating code word length and efficient K constraint
March 31, 2018. 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 ReferencesViterbi equalizer and recording/reproducing device using the same Data recording method and data recording apparatus using a digital sum value of a coded signal Maximum likelihood sequence detector Position detecting device using run position and run length of normalized projection data Method and apparatus for detecting and decoding data in a PRML class-IV digital communication channel Method and apparatus for implementing codes with maximum transition run length Method and apparatus for implementing maximum transition run codes Patent #: 5859601 InventorsApplicationNo. 052582 filed on 03/31/1998US Classes:341/59, To or from run length limited codes341/50DIGITAL CODE TO DIGITAL CODE CONVERTERSExaminersPrimary: Young, BrianAttorney, Agent or FirmInternational ClassH03M 007/46AbstractAn encoder and a method of encoding successive data words into successive code words having alternating code word lengths. Each code word has a plurality of bit locations. A first maximum transition run constraint is imposed on a first set of the bit locations, wherein each bit location in the first set is spaced S bit locations apart from one another, and S is an integer greater than one. A second maximum transition run constraint, which is different than the first maximum transition run constrain, is imposed on a second set of the bit locations, wherein the second set comprises each of the bit locations that are not in the first set. The alternating code word lengths and the value of S are defined such that corresponding bit locations in successive code words have the same maximum transition run constraint.Other References
Field of SearchTo or from run length limited codesTo or from minimum d.c. level codes DIGITAL CODE TO DIGITAL CODE CONVERTERS To or from NRZ (nonreturn-to-zero) codes Return-to-zero to or from NRZ (nonreturn-to-zero) codes To or from bi-phase level code (e.g., split phase code, Manchester code) To or from bi-phase space or mark codes (e.g., double frequency code, FM code) To or from delay modulation code (e.g., Miller code, three frequency code, MFM code) To or from coded mark inversion | |
