JPS5830229Y2 - Jikiki Rokusai Seisouchi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording/reproducing device, and more particularly to a device capable of easily displaying the temporal relationship between recorded data values.

In such a conventional apparatus, as shown in FIG. 1, a time pulse 4 is recorded on a track 3 different from the track 2 on which data 1 is recorded on the magnetic tape T', and these are reproduced separately and compared. Although it is possible to know the time relationship of data 1 by this method, it requires an extra track to record the time pulse 4, so there is a drawback that the data recording capacity cannot be increased.

The present invention eliminates the drawbacks of the conventional devices and provides a magnetic recording and reproducing device that can display the date time with a simple structure without sacrificing the recording capacity. Explain.

FIG. 2 shows a block diagram of an embodiment of the apparatus of the present invention, in which the recording system R is provided with terminals 5 in a number corresponding to the number of channels.

The analog signal input to the input terminal 5 is sent to the A/D converter 6.
It is converted into a digital quantity by
The information is recorded at a predetermined track position on the magnetic tape T.

A pulse generated by a clock oscillator 10 at a predetermined period is amplified by a pulse amplifier 11 and applied to a gate circuit 7, and when the pulse is applied, a time pulse is added and recorded on the A/D converted signal.

The reproduction system P has the same number of channels as the recording system R, and the reproduction signal of each track reproduced by the reproduction means 12 such as a reproduction head is amplified by a reproduction amplifier 13, and then digitally converted by a D/A converter 14. The quantity is converted into an analog quantity, passed through an output amplifier 15, amplified, and taken out at an output terminal 16.

A detection means 17 connected to the D/A converter 14 detects the time pulse recorded by the gate circuit 7 during recording and generates a detection signal.

The detection signal is shaped by a shaping amplifier 18 and outputted to an output terminal 20 as an output mark M at an appropriate level.

Both output terminals 16 and 20 are led to display means 21.

For example, the analog data A as shown in FIG. As shown in Figure 3, after converting into digital data D represented by 7 bits <B, ~B7 and 1 bit represented by B8 for time pulse, the recording system R shown in Figure 2 is used. If the information is to be recorded on the magnetic tape T, the manner in which it is recorded on the magnetic tape T is shown in FIG.

That is, in FIG. 4, the upper part of the magnetic tape T is the track T1 corresponding to the channel C1, which shows the recording state of the channel in which the addition means by the gate circuit 7 does not operate, and the analog data A is recorded, for example, in the inter-tater gap (commonly called IRG).
This shows that raw data d consisting of 7 bits for data and 1 bit for time pulse is arranged at appropriate intervals G such as .

At the bottom of the magnetic tape T, the same data A as for channel C1 is recorded in a track T2 corresponding to channel C2, and a time pulse is recorded as a time mark S in the time pulse bit by a gate circuit 7 at an appropriate period t. A state in which raw data d is arranged is shown.

To simplify the explanation, the reproduction output of one channel C2 and the output mark M of the detection signal that detected the time mark S are taken out from the output terminals 16 and 20, respectively, and displayed on an appropriate display means 21 such as a pen tip. By displaying the analog data A as shown in FIG.
and the output mark M of the time mark S having a period t are displayed in contrast, so if the output marks M are displayed sequentially in the direction of the time axis in the orthogonal coordinates, the data A will be displayed relative to the output mark M as the time axis. This will be displayed as coordinates, allowing for visual comparison and display of changes in data levels over time.

In the above description, tracks T1 and T of the magnetic tape T
In the example shown above, the same data A is recorded on one track T2 and a time mark is recorded on one track T2, but similarly, different analog data is input to channels C1 and C2, and the appropriate period set by each gate circuit 7 is input. When a time mark is recorded in the time pulse bit and reproduced and displayed, the human input data and the output mark of the time mark having an appropriate period set are displayed in comparison with each other.

As described above, the device of the present invention does not require an extra track for recording time pulses, so the tracks on the magnetic tape can be used effectively and the temporal relationship of data can be displayed with a simple configuration. .

[Brief explanation of the drawing]

Fig. 1 is a model diagram showing the state of magnetic tape according to the conventional method, Fig. 2 is a block diagram of an embodiment of the device of the present invention, and Fig. 3 a and b are waveforms of analog data and digital data in the device of the present invention. 4 is a model diagram showing the state of the magnetic tape produced by the device of the present invention, and FIG. 5 is a diagram showing the reproduction and display of the data in FIG. 4 by the device of the present invention. R...recording system, P...playback system, S...
... Time mark, M ... Output of detection means, t ... Period, 7 ... Addition means, 12
. . . Reproduction means, 17 . . . Detection means.

Claims (1)

[Claims for Utility Model Registration] In the process of continuously recording a data signal consisting of elementary data for a required period of time, a time mark is written in addition to a part of the signal forming the elementary data at a predetermined period. a recording system comprising a means for repeatedly generating an addition; a reproducing system comprising a reproducing means for reproducing the recorded data signal; and a detecting means for detecting the time mark from the reproduced data signal; display means formed to visually display the playback output of the playback means and the detection output of the detection means, the display means sequentially displaying the detection output of the detection means in the direction of the time axis in rectangular coordinates; A magnetic recording and reproducing apparatus characterized in that the reproduction output level of the reproducing means corresponding to the detection output of the detecting means is displayed as a coordinate with respect to the time axis.