DE3037343A1 - Audio and video recording on magnetic tape - alternating angled audio and video tracks along tape and setting associated pick=ups at 90 degrees to each other - Google Patents
Audio and video recording on magnetic tape - alternating angled audio and video tracks along tape and setting associated pick=ups at 90 degrees to each otherInfo
- Publication number
- DE3037343A1 DE3037343A1 DE19803037343 DE3037343A DE3037343A1 DE 3037343 A1 DE3037343 A1 DE 3037343A1 DE 19803037343 DE19803037343 DE 19803037343 DE 3037343 A DE3037343 A DE 3037343A DE 3037343 A1 DE3037343 A1 DE 3037343A1
- Authority
- DE
- Germany
- Prior art keywords
- audio
- video
- tape
- recording
- magnetic tape
- 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.)
- Withdrawn
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
- H04N5/78—Television signal recording using magnetic recording
- H04N5/782—Television signal recording using magnetic recording on tape
- H04N5/7824—Television signal recording using magnetic recording on tape with rotating magnetic heads
- H04N5/7826—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape
- H04N5/78263—Television signal recording using magnetic recording on tape with rotating magnetic heads involving helical scanning of the magnetic tape for recording on tracks inclined relative to the direction of movement of the tape
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
- G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
- G11B5/00847—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks
- G11B5/0086—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes on transverse tracks using cyclically driven heads providing segmented tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/52—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with simultaneous movement of head and record carrier, e.g. rotation of head
- G11B5/53—Disposition or mounting of heads on rotating support
- G11B5/531—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis
- G11B5/534—Disposition of more than one recording or reproducing head on support rotating cyclically around an axis inclined relative to the direction of movement of the tape, e.g. for helicoidal scanning
-
- 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
- H04N9/802—Transformation of the television signal for recording, e.g. modulation, frequency changing; Inverse transformation for playback involving processing of the sound signal
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Signal Processing Not Specific To The Method Of Recording And Reproducing (AREA)
Abstract
Description
Verfahren und Gerät zum Aufzeichnen und Wiedergeben Method and device for recording and reproducing
von Videosignalen und Tonsignalen Die Erfindung bezieht sich auf die Videoaufzeichnungs- und Wiedergabetechnik mit Hilfe von Magnetbändern. of video signals and audio signals The invention relates to video recording and playback technology using magnetic tapes.
Die meisten Video-Bandaufzeichnungsgeräte, speziell die Heimgeräte, zeichnen die den Videosignalen zugehörigen Tonsignale auf einer längs der Kante des Magnetbandes laufenden Spur auf.Most video tape recorders, especially the home ones, draw the audio signals associated with the video signals on one along the edge of the magnetic tape.
Die Kanten von Magnetbändern können jedoch während des Laufes beschädigt, insbesondere durch übermäßigen Bandzug verformt werden, was zu Pegelveränderungen bei Aufzeichnung und Wiedergabe führt. In extremen Fällen kann sich sogar der magnetische Film vom Träger lösen, so daß sich ein totaler Tonausfall ergibt. Besonders störend treten Pegelschwankungen bei der Aufzeichnung von Stereo-Tonsignalen in Erscheinung, weil es hier zu ungleichmäßigen Pegelveränderungen zwischen den Kanälen kommen kann.However, the edges of magnetic tapes can be damaged during the run, in particular are deformed by excessive tape tension, resulting in level changes during recording and playback. In extreme cases, even the magnetic Detach the film from the carrier so that there is a total loss of sound. Particularly annoying if level fluctuations occur when recording stereo audio signals, because this can lead to uneven level changes between the channels.
Die Videosignalaufzeichnungstechnik ist in letzter Zeit bemerkenswert dadurch verbessert worden, daß die Laufzeiten der Bänder durch Reduzierung der Laufgeschwindigkeiten erheblich gesteigert werden konnten. Diese stark verminderten Laufgeschwindigkeiten haben jedoch dazu geführt, daß sich die Grenzfrequenz für die Aufzeichnung der Tonsignale der oberen Grenze des Hörbarkeitsspektrums angenähert haben. Eine hohe Aufzeichnungsqualität auch der Tonsignale ist jedoch in Anbetracht der Verbesserungen in der Rundfunkübertragungstechnik sehr wichtig geworden. Es ist daher die Gefahr gegeben, daß bezüglich der Tonwiedergabe die magnetische Aufzeichnung das schwächste Glied in der Übertragungskette darstellt.The video signal recording technique is remarkable recently has been improved in that the running times of the tapes by reducing the running speeds could be increased considerably. This greatly reduced running speeds however, have led to the cut-off frequency for the recording of audio signals have approached the upper limit of the audibility spectrum. A high recording quality however, the audio signals are also in view of the improvements in broadcast transmission technology become very important. There is therefore a risk that the sound reproduction magnetic recording is the weakest link in the chain of transmission.
Die vorliegende Erfindung löst die vorgenannten Probleme dadurch, daß die Tonsignale auf Tonspuren aufgezeichnet werden, die zwischen den Videosignalaufzeichnungsspuren liegen, die bei derartigen Magnetbandaufzeichnungen üblicherweise schräg über das Band verlaufen. Ein Magnetbandgerät zur Aufzeichnung und Wiedergabe solcher Video- und Tonsignale weist daher an einer rotierenden Trommel zwei einander diametral gegenüberliegende Videoköpfe und, um 900 versetzt, zwei einander diametral gegenüberliegende Tonköpfe auf. Diese rotierende Trommel zeichnet somit auf dem in einem vorgegebenen Winkel an ihr vorbeigeführten Magnetband schrägverlaufende Spuren auf, wobei sich Videosignalspuren und Audiosignalspuren einander abwechseln.The present invention solves the aforementioned problems by that the sound signals are recorded on sound tracks located between the video signal recording tracks which are usually at an angle over the Tape run. A magnetic tape recorder for recording and playing back such video and sound signals therefore has two diametrically opposed to one another on a rotating drum opposite video heads and, offset by 900, two diametrically opposite each other Tape heads up. This rotating drum thus draws on the in a given Angle on her past magnetic tape obliquely running tracks, whereby Alternate video signal tracks and audio signal tracks.
Vorzugsweise werden die Audiosignale im Pulscodemodulationsverfahren aufgezeichnet. Das PCM-Verfahren schafft nämlich einen hervorragenden Störabstand, so daß der Ton nicht so stark durch Rauschen beeintächtigt wird.The audio signals are preferably generated using the pulse code modulation method recorded. The PCM process creates an excellent signal-to-noise ratio, so that the sound is not affected so much by noise.
Die Erfindung soll nachfolgend unter Bezugnahme auf die Zeichnungen näher erläutert werden. Es zeigt: Fig. 1 eine schematische Draufsicht auf die umlaufende Trommel, die die Magnetköpfe trägt, und Fig. 2 eine Draufsicht auf ein Magnetband mit schrägverlaufenden Videosignal- und Audiosignalspuren.The invention is described below with reference to the drawings are explained in more detail. It shows: FIG. 1 a schematic plan view of the circumferential Drum carrying the magnetic heads; and Fig. 2 is a plan view of a magnetic tape with skewed video signal and audio signal tracks.
Fig. 1 zeigt in Draufsicht eine Magnetköpfe tragende Trommel 1 mit zwei Videoköpfen 2 und 2', die zur Aufnahme und Wiedergabe von Videosignalen bestimmt sind. Diese Videsköpfe 2 und 2' sind diametral einander gegenüberliegend am Umfang der Trommel 1 angeordnet. Um 900 gegenüber den Videoköpfen 2 und 2' versetzt sind am Umfang der Trommel 1 zwei Tonköpfe 3 und 3' angeordnet, die zur Aufnahme und Wiedergabe von Tonsignalen (Audiosignalen) bestimmt sind. Die Audiosignale werden vorzugsweise im PCM-Uerfahren aufgenommen und abgespielt.Fig. 1 shows a top view of a drum 1 carrying magnetic heads two video heads 2 and 2 'intended for recording and reproducing video signals are. These video heads 2 and 2 'are diametrically opposite one another on the circumference the drum 1 arranged. Are offset by 900 with respect to the video heads 2 and 2 ' on the circumference of the drum 1 two heads 3 and 3 'arranged for recording and Playback of sound signals (audio signals) are intended. The audio signals are preferably recorded and played back in PCM process.
Fig. 2 zeigt die Aufzeichnungsspuren auf einem Magnetband, das mit der Trommel nach Fig. 1 bespielt worden ist. Das Magnetband 4 gleitet in einem Winkel gegenüber der Achse der Trommel 1 über deren Umfang mit einer vorgegebenen festen Geschwindigkeit, so daß von dem Videokopf 2 eine Videospur A, vom Tonkopf 3' eine Tonspur B', vom Videokopf 2' eine Videospur A' und vom Tonkopf 3 eine Tonspur B nacheinander auf dem Band 4 aufgezeichnet werden. Danach wiederholt sich die Aufzeichnungsfolge fortlaufend.Fig. 2 shows the recording tracks on a magnetic tape with the drum of Fig. 1 has been recorded. The magnetic tape 4 slides at an angle relative to the axis of the drum 1 over its circumference with a predetermined fixed Speed, so that from the video head 2 a video track A, from the sound head 3 'one Sound track B ', a video track A' from video head 2 'and a sound track B from sound head 3 sequentially recorded on the tape 4. The recording sequence is then repeated ongoing.
Gemäß der vorliegenden Erfindung werden die Tonsignale nicht längs der Kanten des Magnetbandes aufgezeichnet, sondern, wie die Videosignale, schräg über das Magentband laufend. Auf diese Weise sind Pegelschwankungen oder Tonausfälle, die durch Kantenverformungen oder -zerstörungen des Bandes hervorgerufen werden könnten, vermieden. Darüber hinaus ist der verarbeitbare Tonfrequenzbereich sehr viel größer als bei einer Aufzeichnung längs der Kanten, da die Relativgeschwindigkeit zwischen Tonkopf und Band sehr groß ist. Unter Zuhilfenahme eines PCM-Verfahrens läßt sich Stereoton mit hoher Qualität aufzeichnen und wiedergeben. Im PCM-Verfahren wird jedes Multiplextonsignal für gemischte Aufzeichnung codiert und wird bei der Wiedergabe abgetrennt und demoduliert, was auf bekannte Weise geschehen kann.According to the present invention, the audio signals do not become longitudinal of the edges of the magnetic tape, but, like the video signals, at an angle running over the magenta band. In this way, level fluctuations or sound dropouts, caused by edge deformation or destruction of the strip could be avoided. In addition, the processable audio frequency range is great much greater than when recording along the edges, since the relative speed between the tape head and tape is very large. With the help of a PCM process high quality stereo sound can be recorded and reproduced. In the PCM process each multiplex sound signal is coded for mixed recording and is used in the Playback separated and demodulated, which can be done in a known way.
Claims (3)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13580379A JPS5660178A (en) | 1979-10-19 | 1979-10-19 | Magnetic recording system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3037343A1 true DE3037343A1 (en) | 1981-05-07 |
Family
ID=15160176
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803037343 Withdrawn DE3037343A1 (en) | 1979-10-19 | 1980-10-02 | Audio and video recording on magnetic tape - alternating angled audio and video tracks along tape and setting associated pick=ups at 90 degrees to each other |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5660178A (en) |
DE (1) | DE3037343A1 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0080897A1 (en) * | 1981-11-30 | 1983-06-08 | Sony Corporation | Method of, and apparatus for recording and/or reproducing an information signal |
EP0087114A2 (en) * | 1982-02-22 | 1983-08-31 | Matsushita Electric Industrial Co., Ltd. | Video tape recorder |
EP0110375A1 (en) * | 1982-11-29 | 1984-06-13 | Hitachi, Ltd. | Magnetic recording and reproduction system |
EP0117455A1 (en) * | 1983-02-02 | 1984-09-05 | Hitachi, Ltd. | Multiplex magnetic recording and reproduction system |
FR2546019A1 (en) * | 1983-05-12 | 1984-11-16 | Victor Company Of Japan | ROTARY RECORDING MEDIUM |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5869316U (en) * | 1981-11-02 | 1983-05-11 | 株式会社ケンウッド | Video and audio signal recording and playback equipment |
US4679097A (en) * | 1983-11-30 | 1987-07-07 | Matsushita Electric Industrial Co., Ltd. | Method of recording and reproducing video and audio signals on a magnetic tape |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5558807A (en) * | 1978-10-20 | 1980-05-01 | Pioneer Electronic Corp | Video signal recording and reproduction unit |
-
1979
- 1979-10-19 JP JP13580379A patent/JPS5660178A/en active Pending
-
1980
- 1980-10-02 DE DE19803037343 patent/DE3037343A1/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0080897A1 (en) * | 1981-11-30 | 1983-06-08 | Sony Corporation | Method of, and apparatus for recording and/or reproducing an information signal |
EP0087114A2 (en) * | 1982-02-22 | 1983-08-31 | Matsushita Electric Industrial Co., Ltd. | Video tape recorder |
EP0087114A3 (en) * | 1982-02-22 | 1986-09-03 | Matsushita Electric Industrial Co., Ltd. | Video tape recorder |
EP0110375A1 (en) * | 1982-11-29 | 1984-06-13 | Hitachi, Ltd. | Magnetic recording and reproduction system |
EP0117455A1 (en) * | 1983-02-02 | 1984-09-05 | Hitachi, Ltd. | Multiplex magnetic recording and reproduction system |
FR2546019A1 (en) * | 1983-05-12 | 1984-11-16 | Victor Company Of Japan | ROTARY RECORDING MEDIUM |
Also Published As
Publication number | Publication date |
---|---|
JPS5660178A (en) | 1981-05-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
OP8 | Request for examination as to paragraph 44 patent law | ||
8130 | Withdrawal |