DE3732919A1 - Method of pause searching in cassette recorders - Google Patents

Method of pause searching in cassette recorders

Info

Publication number
DE3732919A1
DE3732919A1 DE19873732919 DE3732919A DE3732919A1 DE 3732919 A1 DE3732919 A1 DE 3732919A1 DE 19873732919 DE19873732919 DE 19873732919 DE 3732919 A DE3732919 A DE 3732919A DE 3732919 A1 DE3732919 A1 DE 3732919A1
Authority
DE
Germany
Prior art keywords
pause
modulation
tape
search
stops
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Withdrawn
Application number
DE19873732919
Other languages
German (de)
Inventor
Friedrich Fueldner
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.)
Deutsche Thomson Brandt GmbH
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 DE19873732919 priority Critical patent/DE3732919A1/en
Publication of DE3732919A1 publication Critical patent/DE3732919A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/05—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container
    • G11B15/087—Control of operating function, e.g. switching from recording to reproducing by sensing features present on or derived from record carrier or container by sensing recorded signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/22—Means responsive to presence or absence of recorded information signals

Landscapes

  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)

Abstract

It is known to equip cassette recorders with a pause search, which detects a modulation pause during fast forwarding or rewinding when the tape is bearing slightly against the sound head and stops the tape drive, or automatically switches it to PLAY mode, if the pause in the modulation is longer than, for example, three seconds. The method is not satisfactory in cases of longer pauses or at the beginning of a tape after a long leader. A method which is improved according to the invention overcomes this drawback in that the pause searching device not only stops the tape drive in a known way when a pause occurs but also stops it when modulation occurs, on condition that at the start of the pause search there is no modulation on the tape and the modulation pause is longer than, for example, ten seconds, that is to say a new modulation section, for example a piece of music, begins after a lengthy pause or at the beginning of a tape after a long leader. The operating mode of the method is explained with reference to an example of a circuit. Cassette recorders. <IMAGE>

Description

Die Erfindung betrifft ein Verfahren für einen Pausensuchlauf gemäß dem Oberbegriff des Anspruchs.The invention relates to a method for a pause search according to the preamble of the claim.

Es ist Stand der Technik, daß Kassettenrecorder (CR) mit einem Pausensuchlauf ausgestattet sind, das heißt mit einer Einrichtung dafür, die bei etwas am Band anliegendem Tonkopf und bei schnellem Vor- oder Rücklauf eine Modulationspause auf dem Band erkennt und den Bandantrieb anhält bzw. in den PLAY-Betrieb automatisch umschaltet, wenn die Pause länger als üblicherweise drei Sekunden ist.It is state of the art that cassette recorders (CR) with a pause search are equipped, that is with a facility for that with something on the tape head and with fast forward or rewind recognizes a break in modulation on the belt and the belt drive stops or automatically switches to PLAY mode when the pause is longer than usually three seconds.

Dazu folgen zwei Beispiele:Here are two examples:

  • 1. Normale Situation zwischen zwei Aufzeichnungen (Modulation);1. Normal situation between two recordings (modulation);
  • 2. lange Pause vor der ersten Aufzeichnung (Modulation).2nd long pause before the first recording (modulation).
1. Beispiel1st example 2. Beispiel2nd example

Diese bekannte Pausensuchlaufeinrichtung und das ihr zugrunde liegende Verfahren arbeitet nicht befriedigend nach längeren Pausen bzw. am Bandanfang nach einem längeren Vorspann.This known pause search device and the one on which it is based Process does not work satisfactorily after long breaks or at the beginning of the tape after a long opening.

Es war die der Erfindung zugrunde liegende Aufgabe, diesen Mangel zu beseitigen.It was the object underlying the invention to remedy this deficiency.

Die Lösung dieser Aufgabe wird durch ein verbessertes Verfahren für den Pausensuchlauf gemäß den im Anspruch aufgeführten Merkmalen erreicht.The solution to this problem is provided by an improved process for the Pause search achieved according to the features listed in the claim.

Weitere Einzelheiten sind der nachstehenden Beschreibung einer beispielhaften Schaltung zur Durchführung des Verfahrens zu entnehmen.Further details are in the following description of an exemplary Circuit to carry out the method.

Vorteilhafterweise ergibt sich nach der Erfindung, daß die Pausensuchlaufeinrichtung nicht nur wie bekannt bei Auftreten von Pausen stoppt, sondern auch dann den Bandantrieb anhält, wenn Modulation auftritt, also eine Aufzeichnung beginnt, allerdings vorausgesetzt, daß beim Starten des Suchlaufs keine Modulation auf dem Band ist und die Modulationspause länger als beispielsweise zehn Sekunden dauert. Das ist der Fall, wenn ein neuer Aufzeichnungsabschnitt, z. B. ein Musikstück, nach einer längeren Pause oder am Bandanfang nach einem langen Vorspann beginnt. According to the invention, it advantageously follows that the pause search device not only as is known when breaks occur stops, but also stops the tape drive when modulation occurs, thus a recording begins, provided that there is no modulation on the tape when the search is started and the modulation pause takes longer than ten seconds, for example. This is the case when a new recording section, e.g. B. a piece of music after a long break or at the beginning of the band after a long opening begins.  

Nachfolgend ist ein Zeitdiagramm als Beispiel dargestellt: Lange Pause vor dem ersten Musikstück.An example of a timing diagram is shown below: Long pause before the first piece of music.

Beschreibung des verbesserten Verfahrens an dem in der Zeichnung dargestellten Schaltungsbeispiel:Description of the improved method on that shown in the drawing Circuit example:

Die im Tonkopf 1 aufgenommene Modulation wird von dem Verstärker 2 soweit verstärkt, daß sie vom Gleichrichter und Begrenzer 3 ausgewertet werden kann. Die Zeitkonstante des RC-Gliedes 4 ist so ausgelegt, daß sie etwa drei Sekunden im PLAY-Betrieb entspricht. Mit dem Komparator 5 steht nun ein Digitalsignal zur Verfügung, das aussagt, ob eine Modulationspause von mehr als drei Sekunden im PLAY-Betrieb vorhanden ist. Der Flip-flop 6 speichert den Suchlaufimpuls.The modulation recorded in the sound head 1 is amplified by the amplifier 2 to such an extent that it can be evaluated by the rectifier and limiter 3 . The time constant of the RC element 4 is designed so that it corresponds to about three seconds in PLAY mode. Comparator 5 now provides a digital signal that indicates whether there is a pause in modulation of more than three seconds in PLAY mode. The flip-flop 6 stores the search pulse.

Wird der Pausensuchlauf während einer Modulation gestartet, geht der Ausgang Q′ von Flip-flop 7 auf LOW; kommt nun eine Pause, die länger als die Zeitkonstante des RC-Gliedes 4 ist, dann geht der Ausgang Q′ auf HIGH und das Monoflop 8, das positiv flankengesteuert ist, gibt einen Pausensuchlauf- Stop-Impuls ab, der auch das Pausensuchlauf-Flip-flop 6 zurücksetzt.If the pause search is started during a modulation, the output Q ' goes from flip-flop 7 to LOW; now comes a pause that is longer than the time constant of the RC element 4 , then the output Q ' goes HIGH and the monoflop 8 , which is positively edge-controlled, emits a pause search stop pulse, which is also the pause search flip -flop 6 resets.

Wenn der Pausensuchlauf in einer Modulationspause gestartet wird, dann ist der Ausgang Q′ des Flip-flops 7 auf HIGH, der Ruhezustand. Erfolgt jetzt innerhalb der Zeit des Zeitgliedes 10, etwa zehn Sekunden des PLAY-Betriebs, eine Modulation, arbeitet die Schaltung wie zuvor beschrieben. Folgt aber keine Modulation, kippt der Ausgang des Zeitgliedes 10 auf HIGH und invertiert mit Hilfe des EXOR-Gatters 9 das Pausensuchlaufsignal. Sobald nun eine Modulation auftritt, erfolgt das Pausensuchlauf-Stop-Signal.If the pause search is started in a modulation pause, then the output Q 'of the flip-flop 7 is HIGH, the idle state. If a modulation now takes place within the time of the timer 10 , approximately ten seconds of the PLAY mode, the circuit operates as previously described. However, if no modulation follows, the output of the timing element 10 tilts to HIGH and inverts the pause search signal using the EXOR gate 9 . As soon as a modulation occurs, the pause search stop signal is given.

Claims (1)

Verfahren für den Pausensuchlauf bei einem Kassettenrecorder (CR), der bei etwas anliegendem Tonkopf am Band und bei schnellem Vor- oder Rücklauf eine Modulationspause auf dem Band erkennt und den Bandantrieb anhält bzw. selbsttätig in den PLAY-Betrieb schaltet, wenn die Pause in der Modulation länger als üblicherweise drei Sekunden ist, dadurch gekennzeichnet, daß die Pausensuchlaufeinrichtung dahingehend ausgebildet ist, daß sie auch dann den Bandantrieb stoppt, wenn Modulation auftritt, also beginnt, vorausgesetzt, daß beim Starten des Suchlaufs keine Modulation auf dem Band ist und die Modulationspause länger als vorzugsweise zehn Sekunden ist.Procedure for the pause search for a cassette recorder (CR) that detects a modulation pause on the tape when the tape head is attached to the tape and fast forward or rewind and stops the tape drive or automatically switches to PLAY mode when the pause is in the Modulation is longer than usually three seconds, characterized in that the pause search device is designed in such a way that it also stops the tape drive when modulation occurs, i.e. it starts, provided that when the search is started there is no modulation on the tape and the modulation pause is longer is preferably ten seconds.
DE19873732919 1987-09-30 1987-09-30 Method of pause searching in cassette recorders Withdrawn DE3732919A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19873732919 DE3732919A1 (en) 1987-09-30 1987-09-30 Method of pause searching in cassette recorders

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873732919 DE3732919A1 (en) 1987-09-30 1987-09-30 Method of pause searching in cassette recorders

Publications (1)

Publication Number Publication Date
DE3732919A1 true DE3732919A1 (en) 1989-04-20

Family

ID=6337203

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873732919 Withdrawn DE3732919A1 (en) 1987-09-30 1987-09-30 Method of pause searching in cassette recorders

Country Status (1)

Country Link
DE (1) DE3732919A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100617A1 (en) * 1990-03-21 1991-09-26 Samsung Electronics Co Ltd AUTOMATIC SEARCH DEVICE FOR A RECORDING / PLAYBACK SYSTEM AND METHOD FOR THE CONTROL THEREOF
EP0534798A2 (en) * 1991-09-27 1993-03-31 Matsushita Electric Industrial Co., Ltd. Tape recorder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2513852A1 (en) * 1974-04-04 1975-10-09 Sharp Kk ARRANGEMENT FOR AUTOMATIC POSITIONING OF THE STARTING POINTS OF MAGNETIC TAPE RECORDS
US4551774A (en) * 1981-03-02 1985-11-05 Pioneer Electronic Corporation Method for selecting desired piece of information recorded in magnetic tape mounted in magnetic tape recorder and/or reproducer
DE3200150C2 (en) * 1981-01-06 1987-03-05 Pioneer Electronic Corp., Tokio/Tokyo, Jp

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2513852A1 (en) * 1974-04-04 1975-10-09 Sharp Kk ARRANGEMENT FOR AUTOMATIC POSITIONING OF THE STARTING POINTS OF MAGNETIC TAPE RECORDS
DE3200150C2 (en) * 1981-01-06 1987-03-05 Pioneer Electronic Corp., Tokio/Tokyo, Jp
US4551774A (en) * 1981-03-02 1985-11-05 Pioneer Electronic Corporation Method for selecting desired piece of information recorded in magnetic tape mounted in magnetic tape recorder and/or reproducer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100617A1 (en) * 1990-03-21 1991-09-26 Samsung Electronics Co Ltd AUTOMATIC SEARCH DEVICE FOR A RECORDING / PLAYBACK SYSTEM AND METHOD FOR THE CONTROL THEREOF
EP0534798A2 (en) * 1991-09-27 1993-03-31 Matsushita Electric Industrial Co., Ltd. Tape recorder
EP0534798A3 (en) * 1991-09-27 1993-06-30 Matsushita Electric Industrial Co., Ltd. Tape recorder

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Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
8139 Disposal/non-payment of the annual fee