GB1413633A - Video recording reproduction apparatus - Google Patents

Video recording reproduction apparatus

Info

Publication number
GB1413633A
GB1413633A GB683273A GB683273A GB1413633A GB 1413633 A GB1413633 A GB 1413633A GB 683273 A GB683273 A GB 683273A GB 683273 A GB683273 A GB 683273A GB 1413633 A GB1413633 A GB 1413633A
Authority
GB
United Kingdom
Prior art keywords
frequency
video recording
reproduction apparatus
feb
recording reproduction
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
GB683273A
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.)
TED Bildplatten AG AEG Telefunken Teldec
Original Assignee
TED Bildplatten AG AEG Telefunken Teldec
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 DE19722206704 external-priority patent/DE2206704C/en
Application filed by TED Bildplatten AG AEG Telefunken Teldec filed Critical TED Bildplatten AG AEG Telefunken Teldec
Publication of GB1413633A publication Critical patent/GB1413633A/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
    • H04N5/7605—Television signal recording on discs or drums
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/02—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal
    • H03D3/18—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements
    • H03D3/20—Demodulation of angle-, frequency- or phase- modulated oscillations by detecting phase difference between two signals obtained from input signal by means of synchronous gating arrangements producing pulses whose amplitude or duration depends on phase difference
    • 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

Abstract

1413633 Frequency demodulators TED BILDPLATTEN AG AEG-TELEFUNKEN TELDEC 12 Feb 1973 [12 Feb 1972] 6832/73 Heading H3A A video recording reproduction apparatus comprises a scanning device (not shown) for providing a frequency or phase modulated signal coupled directly and via a delay circuit 5 to first and second inputs respectively of a demodulator 4, the delay circuit providing a delay of (2n+ 1)/4 times the period of the carrier frequency with n = 1, 2 or 3 whereby disturbance signals lying outside the deviation range of the carrier frequency are substantially attenuated. By choosing n suitably, it is possible to modify the demodulated output versus instantaneous frequency characteristic so that the disturbance signals are either attenuated or completely suppressed. Any increase of non-linearity within the operating range can be minimized by limiting the modulated carrier or by compensating arrangements.
GB683273A 1972-02-12 1973-02-12 Video recording reproduction apparatus Expired GB1413633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722206704 DE2206704C (en) 1972-02-12 Time-of-flight demodulator for a frequency- or phase-modulated carrier wave and its use when scanning recording media

Publications (1)

Publication Number Publication Date
GB1413633A true GB1413633A (en) 1975-11-12

Family

ID=5835815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB683273A Expired GB1413633A (en) 1972-02-12 1973-02-12 Video recording reproduction apparatus

Country Status (6)

Country Link
JP (1) JPS5652365B2 (en)
DD (1) DD103992A1 (en)
DE (1) DE2206704B1 (en)
FR (1) FR2171440B1 (en)
GB (1) GB1413633A (en)
IT (1) IT986044B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56124283U (en) * 1980-02-25 1981-09-21
JPS5765902A (en) * 1980-10-13 1982-04-21 Victor Co Of Japan Ltd Fm demodulating circuit
FR2502422A1 (en) * 1981-03-17 1982-09-24 Thomson Csf DEMODULATOR OF A FREQUENCY MODULE SIGNAL AND A TELEVISION SYSTEM COMPRISING SUCH A DEMODULATOR

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2087429A (en) * 1935-06-06 1937-07-20 Rca Corp Phase and frequency modulation wave receiving system
DE872229C (en) * 1951-05-31 1953-04-13 Siemens Ag Circuit for converting frequency changes of an oscillation into current or voltage fluctuations that follow these changes

Also Published As

Publication number Publication date
IT986044B (en) 1975-01-10
JPS5652365B2 (en) 1981-12-11
FR2171440A1 (en) 1973-09-21
DD103992A1 (en) 1974-02-12
JPS4890454A (en) 1973-11-26
FR2171440B1 (en) 1976-05-14
DE2206704B1 (en) 1973-08-30

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PCNP Patent ceased through non-payment of renewal fee