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Class Information
Number: 369/124.15
Name: Dynamic information storage or retrieval > Specific detail of information handling portion of system > Radiation beam modification of or by storage medium > With details of electrical signal processing > Level detecting using reference signal
Description: Subject matter including step or structure to detect an amplitude of an information signal by comparison with a signal that provides a measuring standard.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 5598389 |
Signal detector for an optical information reproducing apparatus |
Jan. 28, 1997 |
| 5598392 |
Data reproduction system synchronized by recording data |
Jan. 28, 1997 |
| 5596559 |
Information reproducing apparatus for reproducing digital information by self-clock scheme |
Jan. 21, 1997 |
| 5574709 |
Automatic gain control system and information reproduction apparatus using it |
Nov. 12, 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 |
| 5517476 |
Digital signal reproducing apparatus using a viterbi decoder |
May. 14, 1996 |
| 5506827 |
Digital data reproducing apparatus |
Apr. 9, 1996 |
| 5497361 |
Information reproducing apparatus with a DC level correcting capability |
Mar. 5, 1996 |
| 5475672 |
Variable-length information recording with reference marks for time reference during information reading |
Dec. 12, 1995 |
| 5469415 |
Optical information recording or reproducing apparatus with asymmetry compensation |
Nov. 21, 1995 |
| 5467331 |
Recording and reproducing apparatus having arrangement for recovery of read-out data error |
Nov. 14, 1995 |
| 5459704 |
Optical reader for record carriers with different information densities |
Oct. 17, 1995 |
| 5455813 |
Digital signal reproducing apparatus |
Oct. 3, 1995 |
| 5453971 |
Recorded area detection to prevent information overwriting |
Sep. 26, 1995 |
| 5452279 |
Information recording/reproducing apparatus for recording and reproducing information in accordance with mark interval recording scheme or mark length recording scheme |
Sep. 19, 1995 |
| 5446717 |
Optical disc and recording and reproducing method for an optical disc with a high density |
Aug. 29, 1995 |
| 5444688 |
Information reproducing circuit |
Aug. 22, 1995 |
| 5430702 |
Calibration of readback threshold in an optical storage device |
Jul. 4, 1995 |
| 5412632 |
Information reproducing apparatus with a DC level correcting capability |
May. 2, 1995 |
| 5408456 |
Data reproducing method and apparatus for determining the interval between pits on a recording medium from a modulated read-out signal |
Apr. 18, 1995 |
| 5400318 |
Edge detection of information pit pattern by establishing threshold voltage from a closely spaced pit pattern |
Mar. 21, 1995 |
| 5398228 |
Photo-detecting device for reproducing information recorded on an optical disk |
Mar. 14, 1995 |
| 5396479 |
Apparatus and method for setting a threshold level to maintain duty cycle in a pulse width modulated optical recording system |
Mar. 7, 1995 |
| 5392268 |
Optical recording/reproducing apparatus for reproducing information of multiple tracks capable of correcting uneven illumination of the multiple tracks |
Feb. 21, 1995 |
| 5392270 |
Information recording reproducing apparatus using data conversion to provide for accurate reproduction of high density recording using an optical recording medium |
Feb. 21, 1995 |
| 5339303 |
Apparatus for reproducing information from optical disk on which information in recorded by mark length recording |
Aug. 16, 1994 |
| 5295130 |
Apparatus and method for signal reproduction |
Mar. 15, 1994 |
| 5237559 |
Reproduction of sound track signals by varying the detector threshold level as a function of the transverse scan position |
Aug. 17, 1993 |
| 5233589 |
Method for recording/reproducing information having a function of correcting variations in the interval in reproduced data and apparatus for realizing same |
Aug. 3, 1993 |
| 5231627 |
Apparatus for reading optically encoded soundtracks |
Jul. 27, 1993 |
| 5229985 |
Data recording/reproducing apparatus capable of detecting data recording state |
Jul. 20, 1993 |
| 5206853 |
Apparatus and method for detecting intersymbol interference |
Apr. 27, 1993 |
| 5204848 |
Adjusting amplitude detection threshold by feeding back timing-data phase errors |
Apr. 20, 1993 |
| 5164933 |
Reading signal processing circuit in optical information reproducing apparatus |
Nov. 17, 1992 |
| 5151891 |
Method and apparatus for assigning binary values to sample values of a waveform representing a pattern of recording marks on a record carrier |
Sep. 29, 1992 |
| 5134607 |
Optical memory system for generating a timing control signal for detecting a recorded region through a playback signal |
Jul. 28, 1992 |
| 4999824 |
Magneto-optical memory device |
Mar. 12, 1991 |
| 4961182 |
Information retrieving system with level clamping |
Oct. 2, 1990 |
| 4939710 |
Optical magnetic memory device utilizing non-recorded portions of recording medium to represent data |
Jul. 3, 1990 |
| 4847824 |
Readback circuits for magnetooptic players |
Jul. 11, 1989 |
| 4845701 |
Optical disc player for optically reproducing recorded information on an optical information disc into an RF signal |
Jul. 4, 1989 |
| 4743774 |
Method and apparatus for optical detection of information |
May. 10, 1988 |
| 4719612 |
Method of detecting defects on an optical record medium and a device for carrying out the method |
Jan. 12, 1988 |
| 4712206 |
Tracking error signal detecting device with a two-beam system for use in an optical information memory |
Dec. 8, 1987 |
| 4688204 |
Pulsed optical data detection system |
Aug. 18, 1987 |
| 4499570 |
Dropout circuit arrangement for converting an information signal into a rectangular signal |
Feb. 12, 1985 |
| 4124784 |
Motion picture sound system |
Nov. 7, 1978 |
| 4017895 |
Method of detecting defects in read out signals, and apparatus for implementing the same |
Apr. 12, 1977 |
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