GB2012527A - Recording/reproducing system - Google Patents

Recording/reproducing system

Info

Publication number
GB2012527A
GB2012527A GB7846623A GB7846623A GB2012527A GB 2012527 A GB2012527 A GB 2012527A GB 7846623 A GB7846623 A GB 7846623A GB 7846623 A GB7846623 A GB 7846623A GB 2012527 A GB2012527 A GB 2012527A
Authority
GB
United Kingdom
Prior art keywords
signal
recording
wow
memory
sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
GB7846623A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kokusai Gijutsu Kaihatsu Co Ltd
Original Assignee
Kokusai Gijutsu Kaihatsu Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP14687677A external-priority patent/JPS5481810A/en
Priority claimed from JP14799377A external-priority patent/JPS5481811A/en
Priority claimed from JP15238377A external-priority patent/JPS5485019A/en
Application filed by Kokusai Gijutsu Kaihatsu Co Ltd filed Critical Kokusai Gijutsu Kaihatsu Co Ltd
Publication of GB2012527A publication Critical patent/GB2012527A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3018—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is a pilot signal outside the frequency band of the recorded main information signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
    • G11B20/225—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions for reducing wow or flutter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B23/00—Record carriers not specific to the method of recording or reproducing; Accessories, e.g. containers, specially adapted for co-operation with the recording or reproducing apparatus ; Intermediate mediums; Apparatus or processes specially adapted for their manufacture
    • G11B23/0007—Circuits or methods for reducing noise, for correction of distortion, or for changing density of recorded information
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers
    • G11B2220/91—Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
    • G11B2220/913—Digital audio tape [DAT] format

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)

Abstract

In a method of recording and/or reproducing an analog signal using a sensor 5, 6 and a recording medium which is movable relative to the sensor, a sampling signal S9 is generated 10 which has a frequency which is variable dependent upon the amount of wow and flutter caused by fluctuations in the speed of the relative motion. A reproduced signal S5 is sampled 11 by means of the sampling signal and a sampled signal is stored in a memory 14. The stored contents of the memory are read out by using a reading signal S15 with a predetermined frequency, thereby to remove from the reproduced signal varying frequency components caused by the wow and flutter. <IMAGE>
GB7846623A 1977-12-07 1978-11-30 Recording/reproducing system Withdrawn GB2012527A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP14687677A JPS5481810A (en) 1977-12-07 1977-12-07 Recorder*reproducer
JP14799377A JPS5481811A (en) 1977-12-09 1977-12-09 Recorder*reproducer
JP15238377A JPS5485019A (en) 1977-12-20 1977-12-20 Recording*reproducing system

Publications (1)

Publication Number Publication Date
GB2012527A true GB2012527A (en) 1979-07-25

Family

ID=27319250

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7846623A Withdrawn GB2012527A (en) 1977-12-07 1978-11-30 Recording/reproducing system

Country Status (2)

Country Link
DE (1) DE2853013A1 (en)
GB (1) GB2012527A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890946A2 (en) * 1997-07-11 1999-01-13 Alps Electric Co., Ltd. Tape speed sensor, control circuit using tape speed sensor and method of controlling tape speed sensor using control circuit
EP0892400A2 (en) * 1997-07-15 1999-01-20 Alps Electric Co., Ltd. Capstanless tape recording apparatus and recording method using the same
GB2411515B (en) * 2002-10-06 2006-11-29 James R Howarth Corrective adjustment of recording characteristics in digital renditions of analog recordings

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3331128A1 (en) * 1983-08-30 1985-03-14 Dinter, Konrad, Dr., Syracuse, N.Y. Method of reducing the WOW and FLUTTER values in the sound reproduction of magnetic-tape recordings

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0890946A2 (en) * 1997-07-11 1999-01-13 Alps Electric Co., Ltd. Tape speed sensor, control circuit using tape speed sensor and method of controlling tape speed sensor using control circuit
EP0890946A3 (en) * 1997-07-11 2003-09-03 Alps Electric Co., Ltd. Tape speed sensor, control circuit using tape speed sensor and method of controlling tape speed sensor using control circuit
EP0892400A2 (en) * 1997-07-15 1999-01-20 Alps Electric Co., Ltd. Capstanless tape recording apparatus and recording method using the same
EP0892400A3 (en) * 1997-07-15 1999-12-22 Alps Electric Co., Ltd. Capstanless tape recording apparatus and recording method using the same
GB2411515B (en) * 2002-10-06 2006-11-29 James R Howarth Corrective adjustment of recording characteristics in digital renditions of analog recordings
US7933084B2 (en) 2002-10-06 2011-04-26 James R. Howarth Corrective adjustment of recording characteristics in digital renditions of analog recordings

Also Published As

Publication number Publication date
DE2853013A1 (en) 1979-06-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)