GB1113515A - Method for magnetic recording and reproducing of high-frequency signals,in particular television picture signals as well as sound and/or synchronization signals - Google Patents

Method for magnetic recording and reproducing of high-frequency signals,in particular television picture signals as well as sound and/or synchronization signals

Info

Publication number
GB1113515A
GB1113515A GB1633166A GB1633166A GB1113515A GB 1113515 A GB1113515 A GB 1113515A GB 1633166 A GB1633166 A GB 1633166A GB 1633166 A GB1633166 A GB 1633166A GB 1113515 A GB1113515 A GB 1113515A
Authority
GB
United Kingdom
Prior art keywords
signal
signals
frequency
unit
sync
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
GB1633166A
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
Application filed by Loewe Opta GmbH filed Critical Loewe Opta GmbH
Publication of GB1113515A publication Critical patent/GB1113515A/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

Abstract

1,113,515. Video recording & playback. LOEWE OPTA A.G. 23 March, 1966 [23 March, 1965], No. 16331/66. Heading G5R. Video, sound and control signals are recorded on and reproduced from a single magnetic tape channel by frequency modulating a carrier with the video signal and separately amplitude modulating two carriers spaced apart in the frequency spectrum below the frequency of the lowest frequency modulation signal with the sound and control signals. In the arrangement shown, the signals are recorded on oblique tracks on'the tape by a single magnetic head 4, rotating on a head wheel coupled to a braking disc 9. The video signal is amplified in unit 26 and frequency modulates a carrier in unit 27 which supplies an output signal in the band 0À5-4À5 Mc/s. to a recording amplifier 28. The picture sync. signal is separated from the video signal in units 30, 31 and triggers a 10 Kc/s. oscillator 32 to produce a burst of 10 Kc/s. signal during the occurrence of each frame sync. pulse. This signal amplitude modulates in unit 35 the 80 Kc/s. output of oscillator 33, which is also the erasing signal, and the modulated signal is applied to the input of recording amplifier 28. The sync. pulses are also applied, with pulses generated by the rotation of the brake disc 9, to a phase detector 39 which generates a signal to synchronize via braking unit 10 the speed of rotation of the head wheel and the sync. signals. The output frequency of the 80 Kc/s. erase oscillator is doubled in unit 36 to provide a 160 Kc/s. carrier which is amplitude modulated in unit 38 with the audio signal, and this modulated signal is combined with the other two modulated signals in recording amplifier 28, the output of which is connected to the recording head 4. During playback filtering and demodulating units recover the separate signals, the control signals being used to control the speed of rotation of the playback head wheel.
GB1633166A 1965-03-23 1966-03-23 Method for magnetic recording and reproducing of high-frequency signals,in particular television picture signals as well as sound and/or synchronization signals Expired GB1113515A (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB1113515A true GB1113515A (en) 1968-05-15

Family

ID=7273401

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1633166A Expired GB1113515A (en) 1965-03-23 1966-03-23 Method for magnetic recording and reproducing of high-frequency signals,in particular television picture signals as well as sound and/or synchronization signals

Country Status (2)

Country Link
DE (1) DE1277900B (en)
GB (1) GB1113515A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490753A (en) * 1981-02-23 1984-12-25 Hitachi, Ltd. Audio signal recording and reproducing circuit

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3024121A1 (en) * 1980-06-27 1982-01-21 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Video recorder with improved audio reproduction - uses repeater signal for time error correction for audio signal, scanned from tape
CA1157939A (en) * 1980-07-14 1983-11-29 Yoshizumi Watatani Noise elimination circuit in a magnetic recording and reproducing apparatus
FR2494533B1 (en) * 1980-11-20 1987-10-23 Victor Company Of Japan METHOD AND APPARATUS FOR RECORDING / RENDERING A CONTROL SIGNAL IN A VCR
DE3110142A1 (en) * 1981-03-16 1982-09-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Video recorder with improved audio signal recording
DE3153617C2 (en) * 1981-03-16 1991-06-13 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover, De Helical scan VTR audio recording method
DE3110968A1 (en) * 1981-03-20 1982-09-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt VIDEO RECORDER FOR RECORDING AN IMAGE CARRIER FREQUENCY-MODULATED WITH THE VIDEO SIGNAL
DE3121600A1 (en) * 1981-05-30 1982-12-23 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt VIDEO RECORDER WITH IMPROVED SOUND RECORDING
DE3269932D1 (en) * 1981-04-23 1986-04-24 Telefunken Fernseh & Rundfunk Video recorder with improved sound reproduction
DE3122415A1 (en) * 1981-06-05 1982-12-30 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Video recorder with improved recording of the audio signal
DE3122754C2 (en) * 1981-06-09 1983-05-05 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Video recorder with improved sound reproduction
DE3125879A1 (en) * 1981-07-01 1983-01-20 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt VIDEO RECORDER WITH IMPROVED SOUND RECORDING
JPS58100205A (en) * 1981-12-11 1983-06-14 Sony Corp Video and sound signal recording device
JPS58103284A (en) * 1981-12-15 1983-06-20 Sony Corp Video and sound signal recorder
JPS58139575A (en) * 1982-02-13 1983-08-18 Sony Corp Reproducer of video signal and sound signal
DE3205781C1 (en) * 1982-02-18 1983-10-06 Licentia Gmbh Video recorder with time-lapse and / or slow-motion playback
DE3240534A1 (en) * 1982-11-03 1984-10-18 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Video recorder with recording of a sound carrier

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2979558A (en) * 1957-10-02 1961-04-11 Rca Corp Recording and reproducing system
DE1094797B (en) * 1958-07-08 1960-12-15 Telefunken Gmbh Arrangement for recording and reproducing a frequency band that goes down to frequency zero

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4490753A (en) * 1981-02-23 1984-12-25 Hitachi, Ltd. Audio signal recording and reproducing circuit

Also Published As

Publication number Publication date
DE1277900B (en) 1968-09-19

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