G11B20/1407 - CPC Classification Index

ClassID:

198963 ⎘

G11B20/1407 - CPC Classification

Classification description:

Signal processing not specific to the method of recording or reproducing; Circuits therefor; Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol

Sub-classes:

G11B20/1411 » {conversion to or from pulse width coding} 3
G11B20/1415 » {conversion to or from pulse frequency coding} 1
G11B20/1419 » {to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code} 28

Recent Application in this class:

20190123765

Groups of phase invariant codewords

20160344407

Groups of phase invariant codewords

20140086029

Pre-compensated optical tape wobble patterns

20120182164

Signal transmission between a controller and an optical pickup unit

20100302666

Detecting a periodic sequence of servo signals

20100238578

METHOD FOR GENERATING WRITE CLOCK SIGNAL IN MAGNETIC DISK DRIVE

20100238577

Method and apparatus for measuring phase shift in a disk drive having bit-patterned media

20080170489

Optical recording carrier, signal generating apparatus, information recording method, and information reading apparatus

20080055759

Apparatus, system, and method for detecting a periodic sequence of servo signals

20050018336

Double-attribute method of encoding and decoding magnetic data

15911696

Magnetic recording device capable of adjusting high frequency patterns of first and second polarities

15233298

Obtaining a predetermined phase shift in data using different write precompensation associated with different NRZI patterns