GB1502162A - Information transmission system - Google Patents

Information transmission system

Info

Publication number
GB1502162A
GB1502162A GB10711/75A GB1071175A GB1502162A GB 1502162 A GB1502162 A GB 1502162A GB 10711/75 A GB10711/75 A GB 10711/75A GB 1071175 A GB1071175 A GB 1071175A GB 1502162 A GB1502162 A GB 1502162A
Authority
GB
United Kingdom
Prior art keywords
signal
track
recorded
recording
compensation
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.)
Expired
Application number
GB10711/75A
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.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries 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
Application filed by Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Publication of GB1502162A publication Critical patent/GB1502162A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G11B20/24—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing noise
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Noise Elimination (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

The influence of disturbances such as tape noise, distortions or dropouts is to be drastically suppressed. For this purpose, an information signal and a compensation signal are read out from a recording medium. The compensation signal corresponds to the unwanted signal which has entered the information signal during its recording. The information signal and the compensation signal are contained in recording channels (S1, S2). The channels S1, S2 may be contained in separate tracks or as separate frequency bands in one track. During the recording, the input signal is recorded in the first channel (S1). The recorded signal is read out and is fed with the input signal, time-delayed in the time-delay element T, to a comparator device (A). The output signal of the comparator device reproduces the error in the recorded signal; it is recorded in amplified form in the second track (S2) as a compensation signal. During reproduction, the information signal of the first track (S1) and the compensation signal of the second track (S2) are fed to an adding circuit (C). The output signal of the adding circuit (C) is free from the above-mentioned disturbances. <IMAGE>
GB10711/75A 1974-03-18 1975-03-14 Information transmission system Expired GB1502162A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL7403563A NL7403563A (en) 1974-03-18 1974-03-18 NOISE REDUCTION SWITCH.

Publications (1)

Publication Number Publication Date
GB1502162A true GB1502162A (en) 1978-02-22

Family

ID=19820976

Family Applications (1)

Application Number Title Priority Date Filing Date
GB10711/75A Expired GB1502162A (en) 1974-03-18 1975-03-14 Information transmission system

Country Status (13)

Country Link
JP (1) JPS592081B2 (en)
AT (1) AT347714B (en)
AU (1) AU498339B2 (en)
BE (1) BE826772A (en)
CA (1) CA1078063A (en)
CH (2) CH607209A5 (en)
DE (1) DE2509925A1 (en)
ES (2) ES435653A1 (en)
FR (1) FR2265148B1 (en)
GB (1) GB1502162A (en)
IT (1) IT1030349B (en)
NL (1) NL7403563A (en)
NO (1) NO750900L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2734865C2 (en) * 1977-08-03 1986-08-21 Siemens AG, 1000 Berlin und 8000 München Methods and circuit arrangements for reducing interference

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1147261B (en) * 1959-09-30 1963-04-18 Siemens Ag Arrangement for regulating the amplitude fluctuations caused by fluctuations in distance between a moving magnetizable layer of a magnetogram carrier and the magnetic heads
GB888922A (en) * 1960-02-25 1962-02-07 Vectron Electro Physics Ltd Correcting recording distortion

Also Published As

Publication number Publication date
IT1030349B (en) 1979-03-30
AU7917875A (en) 1976-09-23
JPS50128406A (en) 1975-10-09
FR2265148A1 (en) 1975-10-17
NO750900L (en) 1975-09-19
CH614546A5 (en) 1979-11-30
CA1078063A (en) 1980-05-20
AU498339B2 (en) 1979-03-08
DE2509925A1 (en) 1975-09-25
ATA202975A (en) 1978-05-15
BE826772A (en) 1975-09-17
AT347714B (en) 1979-01-10
ES435653A1 (en) 1977-02-01
ES443747A1 (en) 1977-04-16
FR2265148B1 (en) 1981-01-02
NL7403563A (en) 1975-09-22
JPS592081B2 (en) 1984-01-17
CH607209A5 (en) 1978-11-30

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee