GB1191593A - Method of Magnetic Recording and Reproducing of High-Frequency Signals. - Google Patents

Method of Magnetic Recording and Reproducing of High-Frequency Signals.

Info

Publication number
GB1191593A
GB1191593A GB2309168A GB2309168A GB1191593A GB 1191593 A GB1191593 A GB 1191593A GB 2309168 A GB2309168 A GB 2309168A GB 2309168 A GB2309168 A GB 2309168A GB 1191593 A GB1191593 A GB 1191593A
Authority
GB
United Kingdom
Prior art keywords
frequency
signal
carrier
line
signals
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
GB2309168A
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.)
Loewe Opta GmbH
Original Assignee
Loewe Opta GmbH
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 DE1965L0050272 external-priority patent/DE1277900B/en
Application filed by Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB1191593A publication Critical patent/GB1191593A/en
Expired 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/78—Television signal recording using magnetic recording
    • 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
    • H04N5/9201—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal
    • H04N5/9202—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal the additional signal being a sound signal
    • H04N5/9204—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving the multiplexing of an additional signal and the video signal the additional signal being a sound signal using frequency division multiplex
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)

Abstract

1,191,593. Video recording. LOEWA OPTA G.m.b.H. 15 May, 1968 [20 May, 1967], No. 23091/68. Addition to 1,135,515. Heading G5R. In an arrangement for recording and reproducing colour television signals on or from a magnetic tape, the luminance signal frequency modulates a first carrier and the colour difference signals, alternately at line frequency, modulate a second carrier having a frequency such that the highest frequency in its modulated frequency band is below that of the lowest frequency in the modulated frequency band of the first carrier and the modulated signals are combined and applied to a single head recording oblique tracks on the tape. The Y (luminance) signal is applied at input 1 and frequency modulates a carrier F2 in modulator 2. The resultant signal is amplified 3 and applied to recording head 4. The R-Y and B-Y (difference) signals are applied via an electronic switch 9 operating at line frequency to frequency modulate a carrier F1 in modulator 11 and the resultant signal is amplified and also applied to the head 4. On play back the signal is reproduced in head 5, amplified 15 and separated by the HP and LP filters 16, 21. The signals are then demodulated 17, 22 amplified 18, 23 and the Y signal is applied directly to the output terminal 19. The output of the difference signal amplifier 13 is applied to a switch 28 operating at line frequency either directly via line 29 or via a delay element 24, introducing a delay equal to a line period, and an amplifier 25. The arrangement acts such that if e.g. terminal 34 receives the current B-Y signal, terminal 33 is energized by the R-Y signal of the previous line and vice versa.
GB2309168A 1965-03-23 1968-05-15 Method of Magnetic Recording and Reproducing of High-Frequency Signals. Expired GB1191593A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1965L0050272 DE1277900B (en) 1965-03-23 1965-03-23 Method for the magnetic recording and reproduction of high-frequency signals, in particular television picture signals, as well as audio and / or synchronous signals
DEL0056554 1967-05-20

Publications (1)

Publication Number Publication Date
GB1191593A true GB1191593A (en) 1970-05-13

Family

ID=25985934

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2309168A Expired GB1191593A (en) 1965-03-23 1968-05-15 Method of Magnetic Recording and Reproducing of High-Frequency Signals.

Country Status (2)

Country Link
DE (1) DE1512299A1 (en)
GB (1) GB1191593A (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2543390B1 (en) * 1983-03-24 1986-12-05 Sodecom COLOR TELEVISION SIGNAL PROCESSING SYSTEM, ESPECIALLY SECAM TYPE
DE3731179A1 (en) * 1987-09-17 1989-04-06 Graetz Nokia Gmbh Method of recording the video signals for colour television pictures on a recording carrier
DE3731166A1 (en) * 1987-09-17 1989-03-30 Thomson Brandt Gmbh VIDEO RECORDER WITH IMPROVED COLOR RECORDING
DE3732734A1 (en) * 1987-09-29 1989-04-13 Thomson Brandt Gmbh VIDEO RECORDER

Also Published As

Publication number Publication date
DE1512299A1 (en) 1969-10-30

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees