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Class Information
Number: 369/59.18
Name: Dynamic information storage or retrieval > Binary pulse train information signal > Binary signal level detecting using a reference signal > Plural reference signals
Description: Subject matter wherein the amplitude is detected using more than one threshold value.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7599272 |
Method and apparatus for recording and reproducing multi-level information |
Oct. 6, 2009 |
| 7433277 |
Wobble demodulator and wobble demodulation method |
Oct. 7, 2008 |
| 7369625 |
Apparatus and method for slicing RF signal and compensating for the slice level of RF signal in disk drive |
May. 6, 2008 |
| 7200092 |
Method and device for adjusting reference level |
Apr. 3, 2007 |
| 7193951 |
Disk device and method for controlling threshold value of disc device |
Mar. 20, 2007 |
| 7095690 |
Write and/or erase method and storage apparatus |
Aug. 22, 2006 |
| 7065027 |
Method for recovering data and control chip utilizing the same |
Jun. 20, 2006 |
| 6928041 |
Pre-pit detecting apparatus for optical recording medium |
Aug. 9, 2005 |
| 6882612 |
BCA evaluation device and method for rewritable DVDs with different threshold value pulse signals |
Apr. 19, 2005 |
| 6876616 |
Digital signal reproducing apparatus |
Apr. 5, 2005 |
| 6798726 |
Data decoding |
Sep. 28, 2004 |
| 6788484 |
PLL circuit, data detection circuit and disk apparatus |
Sep. 7, 2004 |
| 6765855 |
Signal detection circuit for optical disk |
Jul. 20, 2004 |
| 6611485 |
Apparatus and method for correcting asymmetry of optical disk reproducing system |
Aug. 26, 2003 |
| 6493306 |
Optical disk, optical disk drive apparatus, and optical disk tracking method |
Dec. 10, 2002 |
| 6466530 |
Optical disk, optical disk drive apparatus, and optical disk tracking method |
Oct. 15, 2002 |
| 6407970 |
Enhanced adaptive and selective ISI cancellation for a read channel in storage technologies |
Jun. 18, 2002 |
| 6396787 |
Eight-to-fourteen modulation (EFM) signal generation in optical disk reproducing system using EFM demodulated signal error correction flags |
May. 28, 2002 |
| 6222808 |
Optical information reproducing method and apparatus |
Apr. 24, 2001 |
| 6154429 |
Device for reading from and/or writing to optical recording media |
Nov. 28, 2000 |
| 6141308 |
Zero crossing level matching apparatus and method |
Oct. 31, 2000 |
| 6081485 |
Optical disc accessing apparatus capable of preventing error in the mirror signal |
Jun. 27, 2000 |
| 5920534 |
Optical disk apparatus |
Jul. 6, 1999 |
| 5872754 |
Data reproduction apparatus |
Feb. 16, 1999 |
| 5854779 |
Optical disc reader for reading multiple levels of pits on an optical disc |
Dec. 29, 1998 |
| 5796692 |
Data reproducing method and apparatus for determining the interval between pits on a recording medium from a modulated read-out signal |
Aug. 18, 1998 |
| 5790495 |
Data generator assembly for retrieving stored data by comparing threshold signal with preprocessed signal having DC component |
Aug. 4, 1998 |
| 5761172 |
Method of optical reproduction using pulsed light |
Jun. 2, 1998 |
| 5761171 |
Generating data detecting threshold levels from reference patterns recorded in an optical disk, such as a magneto-optical disk |
Jun. 2, 1998 |
| 5748592 |
Disk drive apparatus and disk storage medium for high density recording |
May. 5, 1998 |
| 5726966 |
Optical recording medium reproducing apparatus using edge detecting technique |
Mar. 10, 1998 |
| 5696745 |
Apparatus and method for detective a sync pattern and an address mark within data provided from a recording medium |
Dec. 9, 1997 |
| 5648949 |
Method and apparatus for information reproduction at variable reference level |
Jul. 15, 1997 |
| 5592456 |
Information reproducing apparatus and method |
Jan. 7, 1997 |
| 5572496 |
Apparatus for reproducing an encoded digital signal based on a frame synchronization signal |
Nov. 5, 1996 |
| 5563863 |
Information reproducing method and apparatus for reproducing digital information by determining the information in multiple bit units based on binarizer output signals |
Oct. 8, 1996 |
| 5559774 |
Optical disc reproducing apparatus which employs a binary detector for the outer tracks and a ternary detector for the inner tracks |
Sep. 24, 1996 |
| 5553046 |
Optical recording medium and playback method utilizing pits on track center and wobble pits |
Sep. 3, 1996 |
| 5483513 |
Recording state detecting apparatus and optical recording medium |
Jan. 9, 1996 |
| 5473591 |
Method for recording and reproducing data on recording mediums |
Dec. 5, 1995 |
| 5469420 |
Multi-value recorded data detecting method |
Nov. 21, 1995 |
| 5459704 |
Optical reader for record carriers with different information densities |
Oct. 17, 1995 |
| 5363352 |
Magneto-optic disk apparatus |
Nov. 8, 1994 |
| 5315567 |
Optical disk formatting system using index mark detecting circuit |
May. 24, 1994 |
| 5311493 |
Data reproduction circuit for converting a read analog signal |
May. 10, 1994 |
| 5237552 |
Sector mark detection in long burn pattern for optical data disks |
Aug. 17, 1993 |
| 5164933 |
Reading signal processing circuit in optical information reproducing apparatus |
Nov. 17, 1992 |
| 4999824 |
Magneto-optical memory device |
Mar. 12, 1991 |
| 4975897 |
Reading circuit for an optical information storing apparatus |
Dec. 4, 1990 |
| 4914623 |
Digital processing of sensor signals for reading binary storage media |
Apr. 3, 1990 |
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