JPS5911964B2 - Magnetic recording method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording system in which at least two sets of main signals 5 and auxiliary signals corresponding to each of the main signals are recorded on a magnetic tape. In addition to being able to perform recording and reproducing, the magnetic head used for this recording and reproducing can also be obtained easily and inexpensively.

・o A conventional recording method for recording main signals and auxiliary signals on a magnetic tape is shown in FIGS. 1 and 2.
That is, what is shown in FIG. 1 shows the main signal tracks 2a, 2b when the magnetic tape 15-1 is run in the direction of arrow A on one side of the longitudinal centerline of the magnetic tape 1.
, main signal tracks 3a and 3b are formed on the other side when running in the direction opposite to the direction of arrow A, and
One auxiliary signal track 4 for recording auxiliary signals related to the two sets of main signals is formed in the center of the magnetic tape 1. In this example, two sets of auxiliary signals are recorded on one auxiliary signal track 4. Since the auxiliary signals used for main signal control and related controls are recorded, they must be recorded and played back in a manner that allows them to be controlled in relation to each main signal. Therefore, this requires an auxiliary signal selection device in the recording or reproducing device, which is expensive and may cause malfunction.

On the other hand, in the one shown in FIG. 2, an auxiliary signal track 4a for recording an auxiliary signal related to the main signal is formed outside one set of main signal tracks 2a) 302b, that is, at the end of the magnetic tape 1. , and an auxiliary signal track 4b for recording an auxiliary signal related to the main signal is formed outside the other pair of main signal tracks 3a, 3b. There is no need for the device to screen the edges of the magnetic tape 1, but the edges of the magnetic tape 1 may be scratched during running or contact with the magnetic head may be poor, so the auxiliary signal cannot be recorded reliably. The relevel that was not present will drop, leading to malfunctions. Furthermore, in the case of this method, the main signal track and its auxiliary signal track are in close proximity, so it is technically very difficult to configure the main signal core and the auxiliary signal core in-line in manufacturing the magnetic head. It was difficult and therefore expensive.

The present invention eliminates the above-mentioned conventional drawbacks, and one embodiment thereof will be described below with reference to FIG. 3. In FIG. 3, the same numbers are attached to the same components as those of the conventional system, and the present invention has two sets of main signal tracks 2a, 2b and 3a, 3b. 3b, that is, at the center of the longitudinal direction of the magnetic tape 1, the main signal tracks 2a, 2 have a space between them and the main signal tracks 2b, 3b, and also have a space between them.
Two auxiliary signal tracks 4 narrower than b, 3a, 3b
a, 4b, and an auxiliary signal related to the main signal recorded on the main signal tracks 2a, 2b is recorded on an auxiliary signal track 4a close to the other main signal track 3a, 3b, and also on the main signal track 3a, 4b. The auxiliary signal related to the main signal recorded on the main signal track 3b is recorded on the auxiliary signal track 4b, which is closer to the other main signal track 2a, 2b.

With this configuration, each auxiliary signal related to the main signal of each pair is recorded with the auxiliary signal tracks separated from each other, so crosstalk between the main signal and its related auxiliary signal is substantially reduced. Moreover, since the respective auxiliary signal tracks are spaced apart from each other and are played back by running in the opposite direction with respect to the running direction of the magnetic tape, the separation between the auxiliary signals is also sufficient. Since it is formed in the center of the tape, a sufficient level is ensured even if the track width is narrow, and it is not affected by damage to the tape edge, unlike in conventional magnetic tapes where auxiliary signal tracks are formed at the edges. Therefore, the auxiliary signal can be recorded and reproduced reliably without being affected by the noise. Furthermore, the main signal core and the auxiliary signal core of the magnetic head used for recording and reproducing the magnetic tape are not in close contact with each other, and the distance between them is at least larger than the width of the auxiliary signal track, making it easy to manufacture the magnetic head. It is what it is.

The main signal is an audio signal or an information signal, and the auxiliary signal is a single signal for a cue or a bit signal for an address signal.

FIG. 4 shows another embodiment of the present invention, in which one main signal track 2 and one main signal track 3 are provided, that is, a monaural example.

Auxiliary signal tracks 4a and 4b are connected to both main signal tracks 2 and 3.
The relationship between the auxiliary signal and the main signal recorded here with a space between them is the same as in the above embodiment.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams showing the conventional magnetic recording system, and Figure 3 is a diagram showing the conventional magnetic recording system.
FIG. 4 shows an embodiment of the system according to the present invention. 1... Magnetic tape, 2a, 2b, 3a, 3b.
...Main signal track, 4a, 4b...Auxiliary signal track.

Claims (1)

[Claims] 1. At least two sets of main signal tracks are formed on a magnetic tape on both sides of the magnetic tape, with the center line in the longitudinal direction as a boundary, and are recorded in mutually opposite directions with respect to the running of the magnetic tape, and there is a gap between the main signal tracks. first and second auxiliary signal tracks having a width narrower than the width of the main signal track are formed with a spacing from the main signal track and a spacing therebetween, and a main signal track of the one set; An auxiliary signal related to the main signal recorded on the track is recorded on a first auxiliary signal track close to the main signal track of the other set, and an auxiliary signal related to the main signal recorded on the main signal track of the other set. A signal is recorded on a second auxiliary signal track close to the one set of main signal tracks, and the one set of main signal tracks and the first auxiliary signal track are reproduced when the magnetic tape runs in one direction. , when the magnetic tape runs in the other direction, the main signal track and the second auxiliary signal track of the other set are reproduced, and depending on the running direction of the magnetic tape, the auxiliary signal tracks that are close to each other along with the main signal track are also reproduced from opposite directions. A magnetic recording method characterized by: