ClassID:

198994

G11B20/182 - CPC Classification

Classification description:

Signal processing not specific to the method of recording or reproducing; Circuits therefor; Digital recording or reproducing; Error detection or correction; Testing, e.g. of drop-outs; Testing using test patterns

Recent Application in this class:
#1
20240265948
2024-08-08

Modulation code and ECC rate optimization using symbol context mutual information

#2
20240265943
2024-08-08

Data Storage Device Configuration Using Mutual Information

#3
20210005226
2021-01-07

Testing assembly for sealed hard disk drives

#4
20200073970
2020-03-05

Storage device manufacturing and associated block chain generation thereof

#5
20200051592
2020-02-13

Detecting damaged areas on magnetic tape based on measuring a number of servo errors

#6
20200051591
2020-02-13

Detecting damaged areas on magnetic tape based on measuring a number of servo errors

#7
20190371362
2019-12-05

Data storage device calibrating data density based on amplitude-inverted or time-inverted read signal

#8
20190189155
2019-06-20

Detecting damaged areas on magnetic tape based on measuring number of servo errors

#9
20170150142
2017-05-25

Testing system, testing method, computer program product, and non-transitory computer readable data carrier

#10
20170092318
2017-03-30

Laser adjustment during field operation of a heat-assisted magnetic recording data storage device

#11
20170062017
2017-03-02

Magnetic recording device capable of implementing read after write

#12
20160055881
2016-02-25

Adaptive HAMR laser power data storage device

#13
20160019981
2016-01-21

Memory test with in-line error correction code logic to test memory data and test the error correction code logic surrounding the memories

#14
20150279419
2015-10-01

Multi-sensor media defect scan

#15
20150170707
2015-06-18

System and method for testing data storage systems utilizing micro-transitions

#16
20150124346
2015-05-07

Cross-track interference testing of a hard disk drive

#17
20140362462
2014-12-11

Systems and methods for media defect detection with pattern qualification

#18
20140211601
2014-07-31

Quality evaluation method, information recording medium, optical disc device and recording/reproducing system

#19
20140143619
2014-05-22

Memory test with in-line error correction code logic

#20
20140113064
2014-04-24

Method and system for optical calibration

#21
20130258513
2013-10-03

MAGNETIC READ-WRITE INSPECTION APPARATUS AND MAGNETIC READ-WRITE INSPECTION METHOD

#22
20130155827
2013-06-20

Method and system for determining the quality of a storage system

#23
20130051206
2013-02-28

Method and system for optical calibration

#24
20120281920
2012-11-08

Parallel test payload

#25
20120201112
2012-08-09

Reproduction signal evaluation method, reproduction signal evaluation unit, and optical disk device adopting the same

#26
20120194936
2012-08-02

Evaluation method of perpendicular magnetic recording medium and manufacturing method of perpendicular magnetic recording medium

#27
20120079194
2012-03-29

METHOD OF TESTING DATA STORAGE DEVICES AND A GENDER THEREFOR

#28
20120002527
2012-01-05

Adjusting method for recording condition and optical disc device

#29
20120002526
2012-01-05

Method of evaluating reproduce signal and optical disc drive

#30
20110317301
2011-12-29

NONLINEARITY MEASUREMENT APPARATUS, NONLINEARITY MEASUREMENT METHOD, AND MAGNETIC RECORDING AND REPRODUCTION APPARATUS

#31
20110228660
2011-09-22

Method and apparatus for measuring a signal

#32
20110181985
2011-07-28

Tape cartridge formatted with predetermined error patterns for testing a tape head of a tape drive

#33
20110149704
2011-06-23

Signal evaluation method and signal evaluation apparatus

#34
20110138227
2011-06-09

Rotational vibration test system and method

#35
20110112788
2011-05-12

Integrated systems testing

#36
20100284257
2010-11-11

Adjusting method for recording condition and optical disc device

#37
20100265608
2010-10-21

Systems and methods for storage channel testing

#38
20100260025
2010-10-14

Adjusting method for recording condition and optical disc device

#39
20100195462
2010-08-05

Method of evaluating reproduce signal and optical disc drive

#40
20100123963
2010-05-20

MAGNETIC STORAGE APPARATUS, HEAD TEST METHOD, AND HEAD TEST APPARATUS

#41
20100123962
2010-05-20

Single-pass defect detection for hard-disk drive systems

#42
20100118423
2010-05-13

Determination of the quality of an erase process for perpendicular magnetic recording disks

#43
20100085851
2010-04-08

METHOD AND APPARATUS FOR EVALUATING INFORMATION RECORDING MEDIUM

#44
20100067135
2010-03-18

Inspection apparatus and inspection method of magnetic disk or magnetic head

#45
20100002556
2010-01-07

Reproduction signal evaluation method, reproduction signal evaluation unit, and optical disk device adopting the same

#46
20090252012
2009-10-08

Defect inspection method and disk drive using same

#47
20090244750
2009-10-01

MAGNETIC-RECORDING-MEDIUM TESTING APPARATUS, MAGNETIC-RECORDING-MEDIUM TESTING METHOD, AND MAGNETIC RECORDING APPARATUS

#48
20090230110
2009-09-17

Position control with compensation for thermal cycling of a workpiece support

#49
20090228744
2009-09-10

Method and system for cache-based dropped write protection in data storage systems

#50
20090225639
2009-09-10

Signal evaluation method and signal evaluation apparatus

#51
20090219793
2009-09-03

METHOD OF SETTING WRITE STRATEGY PARAMETERS, AND RECORDING AND REPRODUCING APPARATUS FOR PERFORMING THE METHOD

#52
20090128943
2009-05-21

Test method and manufaturing method of disk drive device in consideration of manufacturing efficiency

#53
20090113249
2009-04-30

Stress testing method of file system

#54
20090073833
2009-03-19

Method and apparatus for determining optimum laser power

#55
20080304388
2008-12-11

Optical disc recording apparatus and optical disc recording method

#56
20080266692
2008-10-30

MAGNETIC DISK DEVICE AND DATA WRITING METHOD THEREOF

#57
20080259743
2008-10-23

Method and apparatus for phase and/or copy window control for use with a domain expansion recording medium and record carrier

#58
20080219117
2008-09-11

Apparatus and method of setting up bit error rate criterion and apparatus and method of performing burn-in test of hard disk drive

#59
20080198493
2008-08-21

Test method of a magnetic disk and magnectic disk tester

#60
20080198492
2008-08-21

Hard disk drive and associated method for optimizing write parameters

#61
20080198491
2008-08-21

Method of setting write factor in hard disk drive and hard disk drive using the same

#62
20080175120
2008-07-24

OPTICAL DISC APPARATUS AND OPTICAL DISC RECORDING AND REPRODUCTION METHOD

#63
20080151417
2008-06-26

Disk drive with variable track density

#64
20080151405
2008-06-26

System and method for drive-side guarantee of quality of service and for extending the lifetime of storage devices

#65
20080084802
2008-04-10

Method and system for evaluating CD player response to anomalies in a CD

#66
20080031112
2008-02-07

Verification method and apparatus

#67
20080031111
2008-02-07

Verification method and apparatus

#68
20080024894
2008-01-31

Magnetic recording and reproducing device

#69
20080008075
2008-01-10

Method and apparatus for inspecting a recording medium and for inspecting a recording medium drive

#70
20070291604
2007-12-20

Optical information recording method and optical information regeneration recorder, and signal processing circuit, and recording reproduction program and information recording medium

#71
20070271487
2007-11-22

Method of detecting scratch defect in circumferential direction and magnetic disk certifier

#72
20070268036
2007-11-22

Integrated systems testing

#73
20070255519
2007-11-01

Reproducing apparatus manufacturing method, recording medium, and computer product

#74
20070253317
2007-11-01

Recording media and method of manufacturing recording media

#75
20070230000
2007-10-04

Method and apparatus for quantifying stress and damage in magnetic heads

#76
20070183081
2007-08-09

Data storage device and defective area management method therefor

#77
20070121452
2007-05-31

Test disc and drive verification method

#78
20070121450
2007-05-31

Recording method, recording apparatus, program and recording control apparatus

#79
20070115579
2007-05-24

Method to test a tape drive

#80
20070097534
2007-05-03

Tape drive apparatus and method

#81
20070074073
2007-03-29

Detection system and method

#82
20070067700
2007-03-22

Error correction apparatus and method thereof

#83
20070038915
2007-02-15

Adaptive archival format

#84
20070024271
2007-02-01

Integrated systems testing

#85
20070006055
2007-01-04

Method for expediting defect detection and burning

#86
20060277451
2006-12-07

Magnetic disk apparatus, preventive maintenance detection method and program therefor

#87
20060269260
2006-11-30

Method for testing a connection between an audio receiving device and a motherboard

#88
20060261806
2006-11-23

Method for testing magnetic hard disk or magnetic head

#89
20060256670
2006-11-16

Signal-to-noise ratio measurement apparatus and method for signal read out of optical disc

#90
20060221478
2006-10-05

Method and apparatus for providing a read channel having imbedded channel signal analysis

#91
20060215290
2006-09-28

System and method for drive-side guarantee of quality of service and for extending the lifetime of storage devices

#92
20060209443
2006-09-21

Magnetic recording device

#93
20060208932
2006-09-21

Optical disk drive

#94
20060203647
2006-09-14

Apparatus and method for improving deviation of optimum power calibration (OPC)

#95
20060192866
2006-08-31

Recording and reproducing device

#96
20060171278
2006-08-03

Optical disk recorder with reproduction quality control

#97
20060153030
2006-07-13

Optical disk recorder with reproduction quality control

#98
20060153029
2006-07-13

Optical disk recorder with reproduction quality control

#99
20060153028
2006-07-13

Optical disk recorder with reproduction quality control

#100
20060126204
2006-06-15

Manufacturing method for magnetic disk drive

#101
20060119962
2006-06-08

Integrated multiple channel data reliability testing for a magnetic tape drive

#102
20060103962
2006-05-18

Method and apparatus for testing a servo circuit of a read/write head system

#103
20060005073
2006-01-05

Data integrity checking in data storage devices

#104
20050265199
2005-12-01

Information recording medium recording method, information recording/playback apparatus, and information recording medium

#105
20050248868
2005-11-10

Method for testing magnetic hard disk or magnetic head

#106
20050235105
2005-10-20

Disk recording device, monitoring method for disk recording medium, and monitoring program for disk recording medium

#107
20050162986
2005-07-28

Method and apparatus for phase and/or copy window control use with a domain expansion recording medium and record carrier

#108
20050157620
2005-07-21

Method for optically recording information and device for optically recording information by the same

#109
17528443
2023-03-28

End-to-end fixity check for archival storage based on high-performance integrity test with data quality using self-describing tape format

#110
17176354
2022-03-15

Data storage device measuring HAMR media distributions

#111
17128406
2021-11-09

Control method for a memory device

#112
16104332
2019-11-19

Changing bit spacing for selected symbols written to a magnetic recording medium

#113
15985430
2019-02-19

Skip track flaw scan methods and systems

#114
15917350
2020-04-07

System and method for improved memory error rate estimation

#115
15911696
2018-12-04

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

#116
15883577
2019-06-04

Simulating aged storage systems

#117
15849187
2019-03-26

Detecting damaged areas on magnetic tape based on measuring a number of servo errors

#118
15667245
2018-08-07

Health monitoring for head of a heat-magnetic recording device using a writer-reader offset

#119
15091945
2017-03-28

Shingled magnetic recording interband track pitch tuning

#120
14925087
2017-03-14

High frequency reference patterns used to determine head-to-media clearance

#121
14698587
2016-05-10

Unstable reader detection

#122
14640852
2015-10-13

MR-offset change detection and compensation

#123
14584072
2015-12-08

Method for evaluating bit error rate for a magnetic head by using a quasi-static test system, and system thereof

#124
14463163
2014-11-04

Fast flaw scan for multiple sensor systems

#125
14312431
2015-10-27

Data storage device detecting media defects by writing opposite polarity test pattern

#126
14147206
2015-04-21

Systems and methods for testing components of a hard disk drive system

#127
13752758
2015-06-09

Disk drive calibrating failure threshold based on noise power effect on failure detection metric