JPS6120719Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a recording device using a rotating magnetic recording medium.

[Technical background of the invention]

Conventionally, in a recording device using a rotating magnetic recording medium, when recording a large number of still images, the first
As shown in the figure, recording is performed concentrically on a so-called magnetic disk MD, and for convenience of use, for example, A, B, C, etc. are recorded from the outside.
Each track is recorded with a code such as 1, 2, 3, etc. This can be done by mechanically detecting and displaying the position of the recording magnetic head H, as shown in Figure 2a, or by using an electric circuit linked to the feeding mechanism of the magnetic head H, as shown in Figure 2b. Therefore, the position of the head H is detected and the track on which the head H is located is displayed.

[Problems in technical background]

However, with this conventional method, there is not much trouble when recording ready-made screens such as television broadcast images, but when recording with a camera, it is necessary to take your eyes off the camera's viewfinder and check the track number each time. This was extremely inconvenient in practice.

[Purpose of invention]

Therefore, this idea was made in consideration of the above points. For example, it is possible to check the track number while looking at the subject through the camera's viewfinder, and it is also possible to record the track number at the same time as the image signal from the camera. By doing so, it is an object of the present invention to provide an extremely good recording device that can simplify and reliably eliminate the above-mentioned conventional drawbacks.

It is also intended to further improve usability by recording and displaying data related to the image signal, such as date and time, along with the track number.

[Summary of the idea]

This idea was made to deal with the above situation, and the date and time etc. can be added to the truck number signal as necessary.
Signals related to the image to be recorded are added to form a track number information signal, the information is displayed on the camera section, and the information signal is recorded on the rotating magnetic recording medium at the same time as the image signal from the camera. In this way, the above objectives are achieved.

[Example of idea]

An embodiment of this invention will be described in detail below with reference to the drawings.

That is, as shown in Figure 3, the magnetic disk
A track number signal obtained from a track number detector 11 which detects the track number from the MD through the head H feeding mechanism is supplied to a character generating circuit 12. Then, the numerical image signal of the track number generated here is applied to the recording amplifier circuit 13 together with the video signal supplied from the camera, and is recorded from there on the magnetic disk MD via the head H.
The reproduced signal from the head H is led out to a predetermined section via the regenerative amplifier 14, and in other words, it is reproduced on the viewfinder of the camera section for monitoring as shown in Figure 5a. In this case, the track number TN displayed at the upper right corner of the screen can be viewed at the same time as the object image O. However, this method has the advantage that the track number can be displayed on the screen even when a magnetic disk reproducing device that does not have a track number display function is used. Furthermore, this system is extremely useful since it is possible to easily generate other data such as date and time in addition to the track number by the character generating circuit 12, and record and display it as an information signal at the same time as the track number signal.

FIG. 4 shows another embodiment, in which a signal from the track number detector 11 similar to that described above is converted into a pulse signal by a track signal circuit 22, and its pulse signal is applied to the video input signal. The pulse signal is applied during the ranking period, and is subsequently recorded through the recording amplifier 13 in the same manner as in the previous example. During reproduction, a track signal separator 25 separates a track number signal from the reproduced signal that has passed through the regenerative amplifier 14, and displays this on a track number display 26 using a display element such as a liquid crystal or a light emitting diode. However, in the case of this method, the track number TN can be displayed off-screen without displaying any distracting numbers on the screen, as shown in Figure 5b, and it is easier to implement than the previous method, especially when the track number is needed during playback. The frame can be automatically selected from the signals from the track signal separator 25, which is extremely useful. That is, in this case, the means for inputting the track number signal may be used to compare this track number signal with the reproduced track number signal, and the position of the head H may be controlled based on the comparison output. The track number display 27 in the figure is for monitoring the display of the track number and the recorded image at the same time.

In this embodiment as well, the track signal circuit 22 can generate signals such as date and time, record them together with the track number, and display them at the same time.

[Effect of idea]

According to this invention, electrical signals are used to display information such as truck number and date and time.
There is no limit to the length of the cable used, especially for 3 lines and 4 lines.
There is no need to increase the number of cable cores in the line configuration.
It has the advantage of being simple and inexpensive to implement. In this case, the track number, date and time, etc. can be inserted into the recording screen, and the display position is not limited to within and near the camera screen, but can also be displayed at any arbitrary position, such as outside the camera.

Furthermore, in addition to the above-mentioned effects, this invention also has the effect of making it easier to position the head during image reproduction. That is, in this type of recording, the interval between recording bands is usually about 50 μm, and it is not easy to position the head on a desired track. However, according to the invention of the present application, since the head position, that is, the track number, is displayed, it is possible to easily select and reproduce the desired track. In addition, during recording, the track to be recorded can be freely selected at random.

It is also possible to automatically select a desired track by reproducing recorded track numbers.

Furthermore, data such as date and time are also recorded, which is extremely convenient during playback.

As described in detail above, according to this invention, it is possible to provide a recording device using an extremely good rotating magnetic recording medium.

Note that this invention is not limited to the embodiments described above and illustrated, and it goes without saying that various modifications can be made without departing from the gist of this invention.

[Brief explanation of the drawing]

Fig. 1 is a diagram explaining a form of recording a video signal on a magnetic disk, Figs. 2 a and b are diagrams showing examples of conventional track number display, and Figs. 3 and 4 are diagrams of a device according to this invention. A configuration diagram of main parts showing an example,
FIGS. 5a and 5b are diagrams showing specific examples of track number display in the case of FIGS. 3 and 4. FIGS. MD...Magnetic disk, H...Head, 11...
...Track number detector, 12...Character generation circuit,
13... Recording amplifier, 14... Playback amplifier, TN
...Track number, O...Subject image, 22...
Track signal circuit, 25...Track signal separator, 26, 27...Track number display.

Claims (1)

[Claims for Utility Model Registration] (1) A recording device that records a video signal supplied from a camera by a head so as to form a plurality of concentric tracks on a rotating magnetic recording medium, comprising: 1. A recording apparatus using a rotating magnetic recording medium, comprising means for displaying an information signal including a track number signal on the camera, and means for recording the information signal on the recording medium simultaneously with the video signal. (2) A recording device using a rotating magnetic recording medium according to claim 1, wherein the information signal comprises a track number signal and a date and time signal.