WO1992004802A1 - Magnetoscopes pour signaux video avec signaux supplementaires - Google Patents

Magnetoscopes pour signaux video avec signaux supplementaires Download PDF

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Publication number
WO1992004802A1
WO1992004802A1 PCT/EP1991/001587 EP9101587W WO9204802A1 WO 1992004802 A1 WO1992004802 A1 WO 1992004802A1 EP 9101587 W EP9101587 W EP 9101587W WO 9204802 A1 WO9204802 A1 WO 9204802A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
frequency
recorded
signal
magnetic heads
Prior art date
Application number
PCT/EP1991/001587
Other languages
German (de)
English (en)
Inventor
Hans-Jürgen Kluth
Horst Wippermann
Original Assignee
Deutsche Thomson-Brandt 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 Deutsche Thomson-Brandt Gmbh filed Critical Deutsche Thomson-Brandt Gmbh
Priority to KR1019930700576A priority Critical patent/KR930701894A/ko
Publication of WO1992004802A1 publication Critical patent/WO1992004802A1/fr

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
    • H04N9/797—Processing of colour television signals in connection with recording for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal
    • 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
    • H04N5/782—Television signal recording using magnetic recording on tape
    • 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
    • H04N5/782—Television signal recording using magnetic recording on tape
    • H04N5/78213—Television signal recording using magnetic recording on tape involving recording in different depths of the magnetic tape
    • 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
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/8205—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only involving the multiplexing of an additional signal and the colour video signal
    • 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
    • H04N9/82—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only
    • H04N9/83—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal
    • H04N9/832—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback the individual colour picture signal components being recorded simultaneously only the recorded chrominance signal occupying a frequency band under the frequency band of the recorded brightness signal using an increased bandwidth for the luminance or the chrominance signal

Definitions

  • VCR for a television signal with a
  • the invention relates to a video recorder according to the preamble of claim 1.
  • the additional signals go wrong because the recorder is not suitable for recording such a signal in the ultra-black range.
  • the additional signal for the would be a real 16: 9 picture with high quality corresponding HDTV needed.
  • the object of the invention is to enable, in a conventional video recorder, in addition to the recording of the usual television signal for 4: 3 reproduction, also the recording of the additional signals for 16: 9 reproduction with high signal quality.
  • the invention is based on the following consideration.
  • S-VHS recorders or VHS recorders using an S-VHS magnetic tape the recording in the lower-lying magnetic layer with heads of larger gap width is only possible with a smaller bandwidth of approximately 100 kHz to 4.7 MHz possible. However, this bandwidth is sufficient for the additional signal for 16: 9 picture reproduction.
  • the additional signal is preferably recorded in the form of a carrier modulated with the additional signal, in particular a color carrier with the PAL color carrier frequency.
  • the CVBS signal is thus freed from the additional signal, so that no synchronization problems can occur due to the additional signal in the 4: 3 format television receiver.
  • the 4: 3 signal from the upper magnetic layer is combined with the additional signal from the lower, lower magnetic layer.
  • Fig. 1 is a block diagram for the recording
  • Fig. 2 in principle the recording in two
  • Magnetic layers and Fig. 3 is a block diagram for playback.
  • fK * line frequency 15.625 kHz
  • fl frequency of the modulated PAL color carrier
  • MHz f4 frequency of the recorded, modulated with Z.
  • Tl frequency modulated sound carrier for L 1.4 MHz
  • T2 frequency modulated sound carrier for R 1.8 MHz
  • FIG. 1 shows a circuit for the recording for different operating modes, which are explained in the following in succession.
  • the CVBS signal at terminal 1 is split with the comb filter 2 into the signal Y + Z and the modulated color carrier F.
  • Y + Z passes through the low-pass filter 3 with a cut-off frequency of 6 MHz to the blanking stage 4, which by time blanking and blanking separates the signal into the pure luminance signal Y at terminal 5 without Z and the additional signal Z without Y.
  • Y is available at terminal 5 without Z for 4: 3 playback.
  • Y also arrives via the switch 6 on the FM modulator 7, which generates an image carrier frequency-modulated with Y according to the S-VHS system at the output.
  • the image carrier reaches the recording amplifier 8 via the switch 51 and is recorded with the heads K1 in the upper magnetic layer S1 (FIG. 2) of the magnetic tape T.
  • the color carrier F passes through the bandpass filter 9 with a passband of 4.43 ⁇ 1.2 MHz to the converter 10, which converts the frequency of the color carrier from fl to f2.
  • the color carrier Fm also called frequency under carrier, which is thus reduced in frequency, likewise arrives at the amplifier 8 and is recorded in frequency multiplex with the image carrier with Kl on the magnetic tape T.
  • the compander 55 has the task to raise the amplitude-limited additional signal Z to approximately 0.15 Vpp for a better signal-to-noise ratio during playback to an amplitude of 0.7 Vpp and to reduce it to the original value during playback.
  • the additional signal Z is modulated onto a PAL color carrier in quadrature modulation, which is generated in the quartz oscillator 11. This carrier TZ modulated with Z arrives at the frequency converter 12, to which a mixed carrier M with the frequency f3 is also fed.
  • the carrier TZ at the output of the converter 12 reaches the high-pass filter 52 with a limit requirement of 1 MHz, the switch 15 and the amplifier 16 on the heads K2, the TZ in a deeper magnetic layer S2 (FIG. 2) of the magnet band record the T.
  • the heads K2 have a larger gap width of approx. 0.4 ⁇ m compared to the heads Kl.
  • Two stereo sound signals L, R are modulated in the FM modulator 17 two carriers Tl, T2. These carriers are converted in the converter 19 into carrier Tim, T2m with the frequencies of 0.4 and 0.8 MHz, which also reach the heads K2 via the switch 54 and the amplifier 16. Tim and T2m are thus recorded in frequency multiplex below the frequency spectrum of TZ with K2.
  • the recording of the luminance signal Y and the color carrier F remain unchanged.
  • the switch 53 is in the dashed position, so that TZ is no longer limited in bandwidth, but is recorded with full bandwidth using K2.
  • the switches 51, 54, 56 are in the dashed position.
  • T1, T2 are now not recorded with K2, but arrive at amplifier 8 without frequency conversion and are recorded with heads K1. - 6 -
  • the open switch 51 activates the notch filter 50, which suppresses the frequency ranges of the sound carriers T1, T2 at 1.4 and 1.8 MHz in the modulated image carrier.
  • the switch 6 is in the dashed position. At the output of the low pass 3 there is only the luminance signal Y without Z and is recorded in the manner described with Kl. The blanking stage 4 is then no longer necessary. The recording of F remains unchanged. The sound carriers Tl, T2 are recorded in the manner described with the heads K2. This is the case with the usual VHS recording with HiFi sound.
  • Figure 2 shows in principle the recording in different magnetic layers.
  • the heads K1 have a small gap width and effect recording only in the upper magnetic layer S1 of the magnetic tape T.
  • the heads K2 have a larger gap width and thus also effect a recording in the lower magnetic layer S2.
  • the magnetic tape T transported in the direction 20 thus first runs past K2 and then past Kl.
  • the recording made by K2 in the upper magnetic layer S1 is deleted again. 2, Y + F are thus only recorded in the magnetic layer S1 and the additional signal Z only in the lower-lying magnetic layer S2.
  • the sampled signals recorded in accordance with FIG. 1 reach the reproduction amplifier 21, which also effects the switchover between the heads K1.
  • the color carrier F is converted again in the converter 22 from the frequency f2 to fl and passes via the bandpass 23 with a pass band of 4.43 ⁇ 0.6 MHz to the terminal 24, where it is used for reproduction in the original frequency position is available.
  • the image carrier which is frequency-modulated with Y arrives at the FM demodulator 25, which supplies the luminance signal Y for reproduction via the low-pass filter 26 at a limit frequency of 6 MHz at the terminal 28.
  • the signal Y at the terminal 28 can thus be used for a compatible reproduction in 4: 3 format.
  • the sound carriers Tm recorded with K1 are converted again in the converter 32 into the sound carriers T1, T2, which reach the FM demodulator 46 via the switch 33.
  • the latter again supplies the stereo sound signals L, R.
  • the converter 32 is supplied with a mixed carrier by the frequency converter 34, which is fed by the synchronization signal 5.
  • the heads K2 deliver the carrier TZ modulated with the additional signal Z via the amplifier 35 and the low-pass filter with a cut-off frequency of 5 MHz, the frequency of which is converted from f4 to fl in the converter 37.
  • the converter 37 is controlled by the converter 38 with the mixing carrier M.
  • the converter 38 is controlled by the synchronizing pulse separation stage 40 with the line synchronizing pulses ⁇ .
  • the carrier TZ passes through the low-pass filter 39 with a cut-off frequency of 4.7 MHz and the Ko pander 30 to the terminal 31, where the additional signal Z is available for a 16: 9 reproduction.
  • the switch 33 is flipped into the dashed position.
  • the sound carriers T1, T2 now come from the heads K2 and are fed to the FM demodulator 46 via the bandpass 45 with a pass band of 1.2-1.6 MHz.
  • the adder 41 receives the modulated color carrier F, the luminance signal Y without Z and the additional signals Z from the output of the compander 30.
  • the signal FBAS + Z is thus available at terminal 42 as an output with additional signal Z for devices with 16: 9 reproduction .
  • the adder 43 receives only the ink carrier F and Y without Z and supplies at terminal 44 the F3AS signal without additional signal Z for conventional devices with 4: 3 format. This signal is thus desirably freed from the additional signal Z, which is also drawn.

Landscapes

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

Abstract

L'objet de l'invention est d'obtenir un magnétoscope VHS capable d'enregistrer en outre un signal supplémentaire à des fins de reproduction vidéo de haute définition. Le signal supplémentaire (Z) est enregistré dans une deuxième couche magnétique (S2) située sous la première couche magnétique (S1) au moyen de deuxièmes têtes magnétiques (K2) ayant une largeur d'entrefer supérieure à celle des premières têtes magnétiques (K1). L'invention s'applique notamment dans des magnétoscopes S-VHS à enregistrement vidéo de haute définition.
PCT/EP1991/001587 1990-08-30 1991-08-21 Magnetoscopes pour signaux video avec signaux supplementaires WO1992004802A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930700576A KR930701894A (ko) 1990-08-30 1991-08-21 보조신호를 가진 텔레비젼 신호를 위한 비디오 레코더

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4027388.1 1990-08-30
DE4027388A DE4027388A1 (de) 1990-08-30 1990-08-30 Videorecorder fuer ein fernsehsignal mit einem zusatzsignal

Publications (1)

Publication Number Publication Date
WO1992004802A1 true WO1992004802A1 (fr) 1992-03-19

Family

ID=6413198

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1991/001587 WO1992004802A1 (fr) 1990-08-30 1991-08-21 Magnetoscopes pour signaux video avec signaux supplementaires

Country Status (5)

Country Link
EP (1) EP0545980A1 (fr)
JP (1) JPH06500438A (fr)
KR (1) KR930701894A (fr)
DE (1) DE4027388A1 (fr)
WO (1) WO1992004802A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0561546A2 (fr) * 1992-03-17 1993-09-22 Matsushita Electric Industrial Co., Ltd. Magnétoscope capable d'enregistrer et reproduire un signal de chrominance à large-bande
EP0573246A2 (fr) * 1992-06-05 1993-12-08 Matsushita Electric Industrial Co., Ltd. Dispositif d'enregistrement/de reproduction magnétique pour l'enregistrement et la reproduction d'un signal vidéo accompagné d'un signal d'assistance
EP0598184A2 (fr) * 1992-11-18 1994-05-25 Kabushiki Kaisha Toshiba Appareil multisystème pour le traitement et l'enregistrement/la reproduction de signaux
DE4317130A1 (de) * 1993-05-21 1994-11-24 Thomson Brandt Gmbh Videorecorder mit Aufzeichnung eines PALplus-Helpersignals
US5561608A (en) * 1992-11-18 1996-10-01 Kabushiki Kaisha Toshiba Multisystem adaptable type signal processing and recording/reproducing apparatus

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4200434A1 (de) * 1992-01-10 1993-07-15 Thomson Brandt Gmbh Videorecorder fuer ein pal-plus-signal
DE4428299A1 (de) * 1994-08-10 1996-02-15 Thomson Brandt Gmbh Videorecorder mit zusätzlicher Aufzeichnung eines PALplus-Helpersignals

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315740C2 (de) * 1983-04-30 1985-02-21 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Videorecorder mit Aufzeichnung eines Videotext-Signals
EP0136890A2 (fr) * 1983-09-30 1985-04-10 Victor Company Of Japan, Limited Procédé et dispositif pour enregistrer et/ou reproduire des signaux vidéo en couleurs
EP0224321A1 (fr) * 1985-08-23 1987-06-03 Victor Company Of Japan, Limited Appareil d'enregistrement magnétique à enregistrement de deux types de signaux d'information sur les pistes indépendantes d'une bande magnétique
US4758903A (en) * 1984-11-22 1988-07-19 Hitachi, Ltd. Apparatus for recording and reproducing video signal and digital signal other than video signal
WO1989001237A1 (fr) * 1987-08-03 1989-02-09 Siemens Aktiengesellschaft Materiau de base pour semiconducteurs
WO1989012372A1 (fr) * 1988-06-06 1989-12-14 General Electric Company Appareil d'enregistrement de television a definition etendue
DE3942204C1 (fr) * 1989-12-21 1991-04-25 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Hollaend. Stiftung & Co Kg, 8510 Fuerth, De

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1193024A (en) * 1967-03-31 1970-05-28 Rca Corp Video Recording and Reproducing Apparatus
DE1954955B2 (de) * 1967-03-31 1973-01-04 Rca Corp., New York, N.Y. (V.St.A.) Verfahren zur Aufzeichnung von zwei getrennten Signalen mit langwelligem bzw. kurzwelligem Frequenzinhalt in Spuren eines Magnetbandes
JPH0719330B2 (ja) * 1985-12-18 1995-03-06 松下電器産業株式会社 映像信号記録再生装置
JP2675098B2 (ja) * 1988-09-29 1997-11-12 株式会社日立製作所 ビデオテープレコーダの放送番組読み込み・記録装置
DE3841073A1 (de) * 1988-12-07 1990-06-13 Thomson Brandt Gmbh Farbfernsehuebertragungssystem

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3315740C2 (de) * 1983-04-30 1985-02-21 Telefunken Fernseh Und Rundfunk Gmbh, 3000 Hannover Videorecorder mit Aufzeichnung eines Videotext-Signals
EP0136890A2 (fr) * 1983-09-30 1985-04-10 Victor Company Of Japan, Limited Procédé et dispositif pour enregistrer et/ou reproduire des signaux vidéo en couleurs
US4758903A (en) * 1984-11-22 1988-07-19 Hitachi, Ltd. Apparatus for recording and reproducing video signal and digital signal other than video signal
EP0224321A1 (fr) * 1985-08-23 1987-06-03 Victor Company Of Japan, Limited Appareil d'enregistrement magnétique à enregistrement de deux types de signaux d'information sur les pistes indépendantes d'une bande magnétique
WO1989001237A1 (fr) * 1987-08-03 1989-02-09 Siemens Aktiengesellschaft Materiau de base pour semiconducteurs
WO1989012372A1 (fr) * 1988-06-06 1989-12-14 General Electric Company Appareil d'enregistrement de television a definition etendue
DE3942204C1 (fr) * 1989-12-21 1991-04-25 Grundig E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig Hollaend. Stiftung & Co Kg, 8510 Fuerth, De

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0561546A2 (fr) * 1992-03-17 1993-09-22 Matsushita Electric Industrial Co., Ltd. Magnétoscope capable d'enregistrer et reproduire un signal de chrominance à large-bande
EP0561546A3 (fr) * 1992-03-17 1993-10-27 Matsushita Electric Industrial Co., Ltd. Magnétoscope capable d'enregistrer et reproduire un signal de chrominance à large-bande
US5465158A (en) * 1992-03-17 1995-11-07 Matsushita Electric Industrial Co., Ltd. Video tape recorder capable of recording and reproducing wide-band chrominance signal
EP0573246A2 (fr) * 1992-06-05 1993-12-08 Matsushita Electric Industrial Co., Ltd. Dispositif d'enregistrement/de reproduction magnétique pour l'enregistrement et la reproduction d'un signal vidéo accompagné d'un signal d'assistance
EP0573246A3 (en) * 1992-06-05 1994-09-14 Matsushita Electric Ind Co Ltd A magnetic recording/reproducing apparatus for recording and reproducing a video signal added with a helper signal
EP0598184A2 (fr) * 1992-11-18 1994-05-25 Kabushiki Kaisha Toshiba Appareil multisystème pour le traitement et l'enregistrement/la reproduction de signaux
EP0598184A3 (en) * 1992-11-18 1995-09-27 Toshiba Kk Multisystem signal processing and recording/reproducing apparatus.
US5561608A (en) * 1992-11-18 1996-10-01 Kabushiki Kaisha Toshiba Multisystem adaptable type signal processing and recording/reproducing apparatus
US5784526A (en) * 1992-11-18 1998-07-21 Kabushiki Kaisha Toshiba Multisystem signal processing apparatus having specific hierarchical coding
DE4317130A1 (de) * 1993-05-21 1994-11-24 Thomson Brandt Gmbh Videorecorder mit Aufzeichnung eines PALplus-Helpersignals

Also Published As

Publication number Publication date
EP0545980A1 (fr) 1993-06-16
KR930701894A (ko) 1993-06-12
DE4027388A1 (de) 1992-03-05
JPH06500438A (ja) 1994-01-13

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