GB1526567A - Improvements in or relating to recording - Google Patents

Improvements in or relating to recording

Info

Publication number
GB1526567A
GB1526567A GB2897876A GB2897876A GB1526567A GB 1526567 A GB1526567 A GB 1526567A GB 2897876 A GB2897876 A GB 2897876A GB 2897876 A GB2897876 A GB 2897876A GB 1526567 A GB1526567 A GB 1526567A
Authority
GB
United Kingdom
Prior art keywords
signal
carrier
recording
video
demodulated
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
GB2897876A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconi 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
Application filed by Marconi Co Ltd filed Critical Marconi Co Ltd
Priority to GB2897876A priority Critical patent/GB1526567A/en
Publication of GB1526567A publication Critical patent/GB1526567A/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
    • 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
    • H04N5/9205—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 at least another television signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

1526567 Recording MARCONI CO Ltd 25 May 1977 [13 July 1976] 28978/76 Heading H4F To prevent intermodulation between video signals from two (as described) channels and a pilot signal when recorded on a frequency modulated tape system 1, the signal from one channel 2 (preferably the upper channel) is amplitude modulated at 5 on a carrier, summed at 7 with the other video signal and the pilot tone, and then fed to the recording system. During replay, the frequency modulated signal is demodulated at 8, the amplitude modulated carrier, pilot tone and other video signal are filtered out at 9, 10, 11 respectively and the carrier is demodulated so as to provide the three signals originally present at 2, 3, 4. For an arrangement using n video signals, there must be n-1 sources of carrier signal.
GB2897876A 1976-07-13 1976-07-13 Improvements in or relating to recording Expired GB1526567A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2897876A GB1526567A (en) 1976-07-13 1976-07-13 Improvements in or relating to recording

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2897876A GB1526567A (en) 1976-07-13 1976-07-13 Improvements in or relating to recording

Publications (1)

Publication Number Publication Date
GB1526567A true GB1526567A (en) 1978-09-27

Family

ID=10284289

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2897876A Expired GB1526567A (en) 1976-07-13 1976-07-13 Improvements in or relating to recording

Country Status (1)

Country Link
GB (1) GB1526567A (en)

Similar Documents

Publication Publication Date Title
AU579609B2 (en) Vtr
GB1514556A (en) Signal processor for reducing interference between frequency-modulated signals
JPS5350919A (en) Video signal recorder unit
GB983190A (en) Improvements in or relating to magnetic tape recording and playback systems
ES433966A1 (en) Magnetic recording and/or reproducing system
GB1526567A (en) Improvements in or relating to recording
GB1226708A (en)
GB979497A (en) Improvements in or relating to magnetic tape recording and playback systems
ES402133A1 (en) Recording television signals
HK77391A (en) Video recorder with recording of a modified colour carrier
GB798948A (en) System for reproducing signals from a magnetic medium
JPS5580804A (en) Tape recorder capable of time recording
JPS5466711A (en) Video signal reproducing unit
GB1473532A (en) Control of fm beat distortion
JPS5630375A (en) Video signal recording and reproducting device
JPS5417709A (en) Changeover circuit of tape recorder
JPS53116126A (en) Magnetic recording-reproducing system
FR2402367A1 (en) Recording and reproduction of SECAM colour signals - requires separation of luminance and chrominance signals for frequency conversion
JPS53129601A (en) Removing method of interference distortions produced in demodulated signals by interference of fm wave signals with themselves in recording and reproducing system of multichannel disc records
JPS56168480A (en) Recorded recording medium
JPS5271214A (en) Playback method
JPS5447425A (en) Picture recorder/reproducer
JPS5286311A (en) Recording system for fm stereophonic broadcast
JPS53142206A (en) Recorder/reproducer for video signal
JPS57189303A (en) Recording and reproducing device

Legal Events

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