JPS6135611B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic tape recording method, and more particularly to a method for dubbing to a slave tape at high speed while reproducing video signals recorded on a master tape.

As the demand for video tape recorders increases, soft tapes (prerecorded tapes), which can be used to immediately enjoy playing back video, have come into wide use. This soft tape is usually cut by a slave recorder and stored in a tape cassette while playing back the video signal recorded on the master tape, or the slave tape is stored in a tape cassette after being subjected to appropriate editing operations. It is then sold commercially. Here, as a method to obtain multiple soft tapes, if the video signal of the soft tape is recorded by helicus scanning, the recording system of multiple slave recorders is used in the playback system of one master recorder. A so-called head-to-head system is used in which a master recorder plays back video signals from a master tape while a slave recorder records them. However, according to this method, it is necessary to synchronize the relative speed of each rotating head with respect to both tapes, and there is a certain limit to high-speed rotation of the tapes, so it takes a long time to obtain the slave tape. The problem was that it took too much time. In other words, this conventional method takes at least as long as the playback time of the master tape.

The present invention is intended to improve such conventional problems, and in particular, the video signal to be reproduced from a divided master tape or a multi-track master tape that is similarly divided and arranged in parallel is transferred to a predetermined packaging of the slave tape. An object of the present invention is to provide a magnetic tape recording method in which recording is performed simultaneously from a plurality of dividing points of unit length, and a series of recorded slave tapes can be obtained at high speed.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram specifically showing a magnetic tape recording method. Reference numerals 1, 2, and 3 are master recorders for reproducing the master tape, and these include reels 4, 5, and 6 for supply and winding. are provided one each, and furthermore, a master tape 7,
8 and 9 are wrapped and stretched. These master tapes 7, 8, and 9 are, for example, the original master tape, which is the length of one roll of soft tape packaged (accommodated) in a tape cassette, and is divided at each change in the image. ，
11 and 12, and the rotating heads (not shown) in the head drums 10, 11, and 12 allow each video signal to be simultaneously reproduced without leaving any remaining. For this reason, each master tape 7, 8, 9 is initially in a rewound state so that the first portion of the video signal is directed to the recording start position by the rotary head. On the other hand, reference numeral 13 denotes a raw slave tape, which is stretched between a supply reel and a take-up reel 14, and three storage containers 1 are placed on the running path of this slave raw tape 13.
5, 16, and 17 are installed, and storage tapes 13a to 13f corresponding to the recording length of each master tape 7, 8, and 9 are stored therein. At the top of the storage containers 15, 16, 17, there are two drive shafts 18, 19, 20, 21, 22, 23, and pinch rollers 24, 25, 26, 27, 28, 29 that are brought into contact with and separated from these drive shafts. and is provided. Further, 30 to 35 are guide pins for the slave raw tape 13, which are arranged on the running path. On the other hand, slave raw tape 13 is loaded onto the head drum at the lower portions between the guide pin 30 and the drive shaft 19, between the guide pin 32 and the drive shaft 21, and between the guide pin 34 and the drive shaft 23. Loading pins 39, 40, 41 are arranged for this purpose. Reference numerals 36, 37, and 38 are head drums having rotating heads (not shown) inside.

Next, the order in which recording is performed from the master tapes 7, 8, and 9 to the slave raw tape 13 will be explained. First, one end of the slave raw tape 13 is pulled out from the supply reel 14, and the slave raw tape 13 is pulled out from the take-up reel 1.
Lock it to the hub of 4. Subsequently, the pinch rollers 25, 27, 29 are separated from the drive shafts 19, 21, 23, and the pinch rollers 24, 26, 28 are separated from the drive shafts 19, 21, 23.
are brought into contact with the drive shafts 18, 20, 22. Due to the rotation of these drive shafts 18 , 20 , 22 , the slave raw tape 13 is first accumulated in the storage container 17 between the drive shaft 22 and the guide pin 34 . This accumulated amount is assumed to have a length corresponding to the recording length of master tape a. Next, the pinch roller 28 is separated from the drive shaft 22. Then, a slave raw tape 13 having a length corresponding to the recording length of the master tape 8 is stored in the storage container 16 between the drive shaft 20 and the guide pin 32. Further, the pinch roller 26 is separated from the drive shaft 20, and the drive shaft 18 and the pinch roller 24
A slave raw tape 13 corresponding to the recording length of the master tape 7 is stored in the storage container 15 between the drive shaft 18 and the guide pin 30. When the amount becomes appropriate, the pinch roller is separated from the drive shaft 18 and the preparatory operation is completed.

That is, before recording, the storage container 15,1
Drive shaft 18 and guide pin 3 in 6 and 17, respectively.
0, between the drive shaft 20 and the guide pin 32, and between the drive shaft 22 and the guide pin 34, storage tapes 13a, 13b, and 13 shown in the figure are provided, respectively.
c, 13d and 13e, 13f are both accommodated. Note that the take-up reel 14 is stopped during this preparatory operation stage. Further, the reproducing rotary heads of the master recorders 1, 2, and 3 are electrically connected to each recording rotary head of the slave recorders via a reproducing circuit and a recording circuit. Therefore, when a recording start command is issued to the master recorders 1, 2, and 3 and the slave recorders, the loading pins 39, 40, and 41 move around the respective head drums 36, 37, and 38 as shown by chain lines, and the slave recorders move. While sliding the raw tape 13 on the head drums 36, 37, 38,
Pinch rollers 25, 27, 29 are drive shafts 19, 2
1 and 23, respectively, and the reels 4, 5, and 6 of the master recorders 1, 2, and 3 and the rotary heads start rotating. Therefore, master tape 7,
8 and 9 are started, and while the slave tape 13 is also in contact with the rotating heads in the head drums 36, 37, and 38, the recorded storage tapes 13a, 13c, and 13e are transferred from the storage containers 15, 16, and 17. Tapes 13b, 13d, and 13f are obtained one after another. And slave raw tape storage tape 13
When all of the master recorders 1, 2, 3 and slave recorders receive a stop command and stop, the loading pin 39 , 40, 41 return to their initial positions, and the pinch rollers 25, 2
7, 29 are separated from the drive shafts 19, 21, 23,
A reel 14 winds up these series of recorded slave tapes. The recorded slave tape thus obtained is cut as is or subjected to appropriate editing, and then stored in the tape cassette 42. To obtain such a recorded tape, the master tapes 7, 8, and 9 are rewound by a predetermined amount, and the slave raw tape 13 is rewinded onto the take-up reel 1 in the same manner as above.
This can be obtained by pulling it out to the 4th side and repeating the same operation as above. Incidentally, in order to further reduce the time required to rewind the master tapes 7, 8, 9, it is sufficient to record a large number of recording information of the same content on each master tape 17, 18, 19. Also,
Between the guide pins 30 and 19, between 32 and 21, 3
In order to eliminate unrecorded portions such as between 4 and 23, it is also possible to shorten these intervals or remove these lines one by one. FIG. 2 shows a reproduction head drum 43 on the master recorder side prepared for carrying out another method of the present invention. This head drum 43 is long in the direction of its central axis, and is provided with five helical grooves 44, 45, 46, 47, 48.
9, 50, 51, 52, and 53 are rotatably attached. A master tape 54 having a width of five channels is slid onto the head drum 43 while being guided by guide pins 55 and 56. In a master recorder equipped with a head drum device 57 having such a configuration, five storage containers and five head drums are provided on the slave recorder side as shown in FIG. 1, and these are made to correspond to each channel of the master tape. , one master recorder can simultaneously record on a plurality of divided slave tapes, but in this case, the slave raw tapes must all be stored in equal amounts in each storage container.

In summary, according to the present invention, each video signal reproduced from a plurality of divided master tapes or a master tape of a multichannel track arranged in parallel with the same number of divisions is transmitted to a predetermined packaging unit length of a slave raw tape. By simultaneously recording to the slave tape from the recording dividing point, head-to-head recording from the master tape to multiple slaves is speeded up by approximately the same amount as the predetermined packaging unit of the slave tape is divided. Therefore, the production of soft tape tape cassettes can be efficiently increased, and there is an advantage that a large amount of demand can be met.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is an explanatory diagram specifically showing a recording method according to the present invention, and FIG. 2 is a perspective view showing the relationship between a head drum and a slave tape in another recording method. . 1, 2, 3...master recorder, 7, 8, 9...
Master tape, 13...Slave raw tape, 1
5, 16, 17...storage container, 36, 37, 38...
Head drum for slave recorder.

Claims (1)

[Claims] 1. Each video signal reproduced from a plurality of divided master tapes or a master tape of a multi-channel track arranged in parallel with the same number of divisions is recorded from the recording division point of a predetermined packaging unit length of the slave raw tape. A magnetic tape recording method characterized by simultaneously recording on a slave tape.