JPS57138009A - Magnetic recorder and reproducer - Google Patents

Magnetic recorder and reproducer

Info

Publication number
JPS57138009A
JPS57138009A JP2300381A JP2300381A JPS57138009A JP S57138009 A JPS57138009 A JP S57138009A JP 2300381 A JP2300381 A JP 2300381A JP 2300381 A JP2300381 A JP 2300381A JP S57138009 A JPS57138009 A JP S57138009A
Authority
JP
Japan
Prior art keywords
nonlinear
waveform
deemphasis
input
attenuator
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.)
Pending
Application number
JP2300381A
Other languages
English (en)
Japanese (ja)
Inventor
Koichi Hirose
Yoshinori Okada
Akira Shibata
Himio Nakagawa
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2300381A priority Critical patent/JPS57138009A/ja
Priority to DE19823206047 priority patent/DE3206047C2/de
Publication of JPS57138009A publication Critical patent/JPS57138009A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/921—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback by recording or reproducing the baseband signal
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G11B5/027—Analogue recording
    • G11B5/035—Equalising
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/92—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N5/923—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback using preemphasis of the signal before modulation and deemphasis of the signal after demodulation

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
JP2300381A 1981-02-20 1981-02-20 Magnetic recorder and reproducer Pending JPS57138009A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2300381A JPS57138009A (en) 1981-02-20 1981-02-20 Magnetic recorder and reproducer
DE19823206047 DE3206047C2 (de) 1981-02-20 1982-02-19 Anordnung zum Aufbereiten von Videosignalen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2300381A JPS57138009A (en) 1981-02-20 1981-02-20 Magnetic recorder and reproducer

Publications (1)

Publication Number Publication Date
JPS57138009A true JPS57138009A (en) 1982-08-26

Family

ID=12098319

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2300381A Pending JPS57138009A (en) 1981-02-20 1981-02-20 Magnetic recorder and reproducer

Country Status (2)

Country Link
JP (1) JPS57138009A (de)
DE (1) DE3206047C2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439299A2 (de) * 1990-01-23 1991-07-31 International Business Machines Corporation Schaltung zur Unterdrückung von additiven Fehlern in Datenkanälen

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6093682A (ja) * 1983-10-25 1985-05-25 Sony Corp デイジタル非線形プリエンフアシス回路
US4849826A (en) * 1986-11-14 1989-07-18 Matsushita Electric Industrial Co., Ltd. Digital non-linear pre-emphasis/de-emphasis apparatus for eliminating noise components from video signals in a video signal processing system
JPH0468923A (ja) * 1990-07-09 1992-03-04 Sony Corp ノンリニアプリエンファシス・デエンファシスシステム

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3333055A (en) * 1963-06-01 1967-07-25 Fernseh Gmbh Apparatus for increasing the signal-to-noise ratio of a television signal
GB1120541A (en) * 1965-08-11 1968-07-17 Dolby Ray Milton Improvements in noise reduction systems
GB1579138A (en) * 1976-07-06 1980-11-12 Sony Corp Noise and cross-talk elimination in recording and reproducing video signals
JPS5412714A (en) * 1977-06-29 1979-01-30 Matsushita Electric Ind Co Ltd Recorder-reproducer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0439299A2 (de) * 1990-01-23 1991-07-31 International Business Machines Corporation Schaltung zur Unterdrückung von additiven Fehlern in Datenkanälen

Also Published As

Publication number Publication date
DE3206047C2 (de) 1986-07-31
DE3206047A1 (de) 1982-11-11

Similar Documents

Publication Publication Date Title
JPS5412714A (en) Recorder-reproducer
JPS5717241A (en) Dynamic emphasis circuit
JPS57140085A (en) Audio signal recording and reproducing circuit
JPS57138009A (en) Magnetic recorder and reproducer
JPS5635580A (en) Noise suppressing device for television signal
KR930002140B1 (ko) 영상신호의 기록처리회로
JPS5752240A (en) Noise reducing circuit
JPS55125786A (en) Recording and reproduction method for video signal
JPH0468923A (ja) ノンリニアプリエンファシス・デエンファシスシステム
JPS5446420A (en) Dubbing system
KR100236362B1 (ko) 비선형 디엠파시스 회로
JPS5526763A (en) Sound picture signal recording reproducer
JPS5293231A (en) Reproducing device for multiple information
JPS57123511A (en) Recording and reproducing device for video signal
JP2591005B2 (ja) ノイズキャンセラー装置
JPS57147104A (en) Vtr having switching function of oxide tape and metal tape
JPS5350959A (en) Automatic gain control device
JPH0238483Y2 (de)
JPS5382110A (en) Compensating circuit for non-linearity
JPS5724176A (en) Magnetic recording and playback device
JPS54146925A (en) Magnetic recording and reproducing device
JPS5772406A (en) Automatic following predistortor
JPS5781786A (en) Equipment for recording-regenerating static picture
JPS5715293A (en) Signal recording and reproduction system
JPS5580986A (en) Recorder/reproducer for secam-system color television signal