GB2005513A - Magnetic recording and reproducing apparatus - Google Patents

Magnetic recording and reproducing apparatus

Info

Publication number
GB2005513A
GB2005513A GB7837313A GB7837313A GB2005513A GB 2005513 A GB2005513 A GB 2005513A GB 7837313 A GB7837313 A GB 7837313A GB 7837313 A GB7837313 A GB 7837313A GB 2005513 A GB2005513 A GB 2005513A
Authority
GB
United Kingdom
Prior art keywords
signal
frequency
luminance signal
separated
modulated
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.)
Granted
Application number
GB7837313A
Other versions
GB2005513B (en
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 JP52114298A external-priority patent/JPS6023555B2/en
Priority claimed from JP52114313A external-priority patent/JPS602836B2/en
Priority claimed from JP52157642A external-priority patent/JPS5850077B2/en
Priority claimed from JP171678U external-priority patent/JPS5919509Y2/en
Priority claimed from JP1951878U external-priority patent/JPS599488Y2/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of GB2005513A publication Critical patent/GB2005513A/en
Application granted granted Critical
Publication of GB2005513B publication Critical patent/GB2005513B/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/79—Processing of colour television signals in connection with recording
    • H04N9/80—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback
    • H04N9/86—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded sequentially and simultaneously, e.g. corresponding to SECAM-system
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Television Systems (AREA)
  • Television Signal Processing For Recording (AREA)
  • Processing Of Color Television Signals (AREA)

Abstract

In the magnetic recording of a SECAM color television signal, the luminance signal is modulated in angle, while the frequency of the chrominance signal is converted to a predetermined lower frequency band through frequency division means solely or in combination with frequency conversion and recorded on a recording medium after having been superposed on the angular modulated luminance signal at a low band thereof. For reproduction, the luminance signal modulated in angle and the chrominance signal having frequency stepped down to the lower band are separated from the reproduced signal. The separated luminance signal is demodulated to obtain the reproduced luminance signal, while the separated chrominance signal is restored to the original frequency through frequency multiplier means solely or in combination with frequency conversion means and mixed to the reproduced luminance signal, thereby to produce the original SECAM system color television signal. By utilizing azimuth angle, high density recording such as guard-bandless recording can be attained. <IMAGE>
GB7837313A 1977-09-21 1978-09-19 Magnetic record ing and reproducing apparatus Expired GB2005513B (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP52114298A JPS6023555B2 (en) 1977-09-21 1977-09-21 SECAM color television signal recording method
JP52114313A JPS602836B2 (en) 1977-09-22 1977-09-22 SECAM color television signal recording method
JP52157642A JPS5850077B2 (en) 1977-12-27 1977-12-27 SECAM video signal recording/playback device
JP171678U JPS5919509Y2 (en) 1978-01-10 1978-01-10 SECAM video signal recording/playback device
JP1951878U JPS599488Y2 (en) 1978-02-15 1978-02-15 SECAM color television signal recording device

Publications (2)

Publication Number Publication Date
GB2005513A true GB2005513A (en) 1979-04-19
GB2005513B GB2005513B (en) 1982-03-31

Family

ID=27518154

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7837313A Expired GB2005513B (en) 1977-09-21 1978-09-19 Magnetic record ing and reproducing apparatus

Country Status (3)

Country Link
FR (1) FR2404275B1 (en)
GB (1) GB2005513B (en)
NL (1) NL7809567A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478923A1 (en) * 1980-03-21 1981-09-25 Victor Company Of Japan COLOR VIDEO SIGNAL RECORDING AND / OR PLAYBACK DEVICE
EP0036767A1 (en) * 1980-03-25 1981-09-30 Matsushita Electric Industrial Co., Ltd. Magnetic recording method
FR2507418A1 (en) * 1981-06-03 1982-12-10 Victor Company Of Japan Colour TV signal recording system - uses two adjacent tracks for recording two processed chrominance signals of different frequencies reducing cross-talk
DE3220607A1 (en) * 1981-06-01 1982-12-30 Victor Company Of Japan, Ltd., Yokohama, Kanagawa Recording system and recording and replay system for colour video signals according to the SECAM system
FR2531293A1 (en) * 1982-07-30 1984-02-03 Victor Company Of Japan Device for reproducing a colour video signal of the SECAM type with transformation of the frequency of the chrominance carrier signal.
FR2533788A1 (en) * 1982-09-25 1984-03-30 Victor Company Of Japan COLOR VIDEO SIGNAL RECORDING AND / OR REPRODUCTION SYSTEM
EP0193648A2 (en) * 1985-03-06 1986-09-10 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Apparatus for recording and reproduction of SECAM colour video signals
FR2730595A1 (en) * 1995-02-09 1996-08-14 Mitsubishi Electric Corp PROCESSING DEVICE FOR THE REPRODUCTION OF A SECAM CHROMINANCE SIGNAL

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2419632B1 (en) * 1978-03-08 1986-02-28 Sanyo Electric Co METHOD AND APPARATUS FOR RECORDING "SECAM" CHROMINANCE SIGNALS
JPS57201396A (en) * 1981-06-03 1982-12-09 Victor Co Of Japan Ltd Secam color video signal recording system and reproducing system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2478923A1 (en) * 1980-03-21 1981-09-25 Victor Company Of Japan COLOR VIDEO SIGNAL RECORDING AND / OR PLAYBACK DEVICE
EP0036767A1 (en) * 1980-03-25 1981-09-30 Matsushita Electric Industrial Co., Ltd. Magnetic recording method
DE3220607A1 (en) * 1981-06-01 1982-12-30 Victor Company Of Japan, Ltd., Yokohama, Kanagawa Recording system and recording and replay system for colour video signals according to the SECAM system
FR2507418A1 (en) * 1981-06-03 1982-12-10 Victor Company Of Japan Colour TV signal recording system - uses two adjacent tracks for recording two processed chrominance signals of different frequencies reducing cross-talk
FR2531293A1 (en) * 1982-07-30 1984-02-03 Victor Company Of Japan Device for reproducing a colour video signal of the SECAM type with transformation of the frequency of the chrominance carrier signal.
FR2533788A1 (en) * 1982-09-25 1984-03-30 Victor Company Of Japan COLOR VIDEO SIGNAL RECORDING AND / OR REPRODUCTION SYSTEM
EP0193648A2 (en) * 1985-03-06 1986-09-10 GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG. Apparatus for recording and reproduction of SECAM colour video signals
EP0193648A3 (en) * 1985-03-06 1987-06-24 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Holland. Stiftung & Co. Kg. Apparatus for recording and reproduction of secam colour video signals
FR2730595A1 (en) * 1995-02-09 1996-08-14 Mitsubishi Electric Corp PROCESSING DEVICE FOR THE REPRODUCTION OF A SECAM CHROMINANCE SIGNAL

Also Published As

Publication number Publication date
GB2005513B (en) 1982-03-31
NL7809567A (en) 1979-03-23
FR2404275B1 (en) 1986-08-14
DE2840969A1 (en) 1979-03-29
DE2840969C2 (en) 1982-06-16
FR2404275A1 (en) 1979-04-20

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19930919