JPH02118965A - Signal recording and reproducing device - Google Patents

Abstract

PURPOSE:To confirm the recorded content of a recording medium without reproducing a whole track every time the recording medium is inserted by previously producing a catalogue track where the summary of the content of the whole track is recorded at a recording time and reproducing it in the first place at a reproducing time. CONSTITUTION:First, 49 sheets of still picture are recorded on the first to forty-ninth track (the ordinary recording operation). Next, the first track is reproduced by a reproducing head 6. The reproduction output is transmitted to a memory circuit 10 through a reproduction video signal processing circuit 8 and written in the address of a memory 10b specified by an address control circuit 10c. This operation is repeated to the forty-ninth track. At this time, data is written in the memory by thinning with the aid of address operation so that the whole data quantity is made the quantity of one track of a video floppy. Next, a data signal is read out from the specified address of the memory 10b and recorded on the fiftieth track by a recording head 4 through a switch 11 for producing a catalogue and a recording video signal processing circuit 2. Thus, the catalogue track is formed on the fiftieth track. Then, it is reproduced, first.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for recording and reproducing information on a magnetic disk, such as a video floppy recorder.

Conventional technology In recent years, 2-inch floppy disks (hereinafter referred to as video floppies) have been used instead of cameras that use film.
A video floppy recorder that records still images has been commercialized, and it is expected that various products such as electronic still cameras will be produced in the future.

The signal recording and reproducing apparatus as described above will be described below with reference to the drawings.

FIG. 4 is a block diagram showing a video floppy recording and reproducing device as an example of a device for recording and reproducing signals. 1 is a video input terminal, 2 is a recording video signal processing circuit that processes the video signal input to the video input terminal 1, 3 is a recording amplifier, 4 is a recording head, 5 is a video floppy 6
1 is a playback head, 7 is a playback amplifier, 8 is a playback video signal processing circuit for processing a playback signal, and 9 is a video output terminal.

As is well known, the video floppy 5 has 50 concentric tracks extending from the outside to the inside, and one field of video signal (still image) is recorded on each track. Video signal recording modes include "field recording" and "frame recording." In field recording, one field of video signal is recorded on one track, and in frame recording, one field of video signal is recorded on one track. 1 per record
A frame of video signal is recorded on two adjacent tracks one field at a time. Therefore, all "field records"
In this case, 50 field pictures will be recorded on one video floppy, and if all are "frame recording", 25 frame pictures will be recorded on one video floppy.

When recording a video signal on the video floppy 5, the video signal input through the input terminal 1 is processed by the recording video signal processing circuit 2, the signal is amplified by the recording amplifier 3, and the video signal is input to the recording floppy disk 4. Recorded on floppy 5.

Further, when reproducing a video signal recorded on the video floppy 5, the signal reproduced from the reproducing head 6 is amplified by the reproducing amplifier 7, processed by the reproduced video signal processing circuit 8, and then output from the video output terminal 9. Output to monitor, printer, etc.

Problems to be Solved by the Invention However, with the above conventional configuration, in order to check what kind of video is recorded on the video floppy, it is necessary to play back all 50 tracks at once, making the processing very complicated. It had the disadvantage of becoming

The present invention solves the above-mentioned conventional problems, and provides an excellent signal recording and reproducing device that can confirm the recorded contents of a recording medium without reproducing all tracks each time a disc is inserted. The purpose is to provide.

Means for Solving the Problems The present invention provides a plurality of tracks for signal recording and at least one track for recording part of the recorded content of each signal recording track.
a recording medium having two catalog tracks; a recording means for recording signals on the tracks on the recording medium; a reproducing means for reproducing signals recorded on each track of the recording medium; and reproduction obtained by the reproducing means. a storage means for temporarily storing signals; and a reproduction means for sequentially reproducing the signals of each trunk for signal recording recorded on the recording medium, reducing information of the reproduced signal and providing it to the storage means; The apparatus is characterized by comprising a control means for reading out data stored in a storage means, applying it to the recording means, and causing the data to be recorded on a catalog track on the recording medium.

Effect of the Invention With the above-described configuration, the present invention can record a summary of the contents recorded on all signal recording tracks of a recording medium in a predetermined catalog track. To this end, by playing the catalog track during playback,
It becomes possible to check the contents recorded on the recording medium at a glance.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings.

Fig. 1 is a block diagram of a video recording/playback device according to an embodiment of the present invention, Fig. 2 is a flowchart for creating a dedicated track (hereinafter referred to as a catalog track), and Fig. 3 is a flow chart for recording on a catalog track. An example of an image is shown.

In FIG. 1, circuits that operate in the same way as in FIG. 4 are given the same reference numerals. In the figure, 1 is a video input terminal, 2
3 is a recording amplifier, 4 is a recording head, 5 is a video floppy recording medium, 6 is a playback head, 7 is a playback amplifier, Reference numeral 8 denotes a reproduced video signal processing circuit for processing the reproduced signal, and 9 denotes a video output terminal.

In this embodiment, the recorded video processing circuit 2, recording amplifier 3, and recording head 4 constitute a recording means for recording signals on tracks on a recording medium, and the reproduction head 6, reproduction amplifier 7, and reproduction video signal processing circuit 8 constitutes a reproducing means for reproducing signals recorded on each track of the recording medium.

The above is the same as the conventional example, and its operation will not be explained here.

10 is a memory circuit, for example, an A/D converter 10a that converts an analog signal into a digital signal, a memory 10b that is a storage means for storing digital signals, and an address control circuit 10c that controls the address of the memory 10b.
and a D/A converter 10ci that converts digital signals into analog signals. 11 is a switch for creating a catalog, and when creating a catalog, the memory circuit 1 is
Select 0 output. The control circuit 12 is a control means that supplies control signals to the reproduced video signal processing circuit 8, the recorded video signal processing circuit 2, and the address control circuit when creating a catalog track, and also controls the recording head 4 and the reproducing head 6, and is implemented by, for example, a microcomputer. realized by

The memory circuit 10 receives the output of the reproduced video signal processing circuit 8 as an input. The input analog signal is sent to A/D converter 1
It is converted into a digital signal by 0a. Thereafter, the converted digital signal is written to the address of the memory 10b designated by the address control circuit 10c. At this time, for example, by making the addressing speed slower than the A/D conversion speed, it is possible to thin out the digital signals and write them into the memory 10b.

After all writing is completed, the address control circuit 10c
The digital signal is read out from the address in the memory 10b specified by , converted into an analog signal by the D/A converter 10d, passed through the catalog creation switch 11, and is output to the recorded video signal processing circuit 2.

Below, we will explain the case where everything is "field recorded". As already mentioned, if all "field recording" is performed, 50 still images (field images) will be recorded on one video floppy.

However, here, for example, up to 49 still images are recorded, and the remaining one, ie, one track, is assigned as a catalog track for recording a summary of the previously recorded 49 still images.

First, 49 still images (field images) are recorded from the first track to the 49th track. This recording is performed by a conventional recording operation.

Next, the catalog track creation operation will be explained with reference to the flowchart shown in FIG.

First, the track to be accessed by the playback head 6 is set as the first track (step 1). Set the playback head 6 to the first position.
The track is accessed (step 2), and the first accessed track is played back (step 3). The reproduced output of the first track undergoes signal processing by a reproduced video signal processing circuit 8 and is output to a memory circuit 10. Memory circuit 1
The analog signal input to 0 is converted into a digital signal by the A/D converter 10a, and the analog signal input to address control circuit 1
The data is written to the address of the memory 10b specified by 0c (step 4).

Next, the next track is set as the track to be accessed (step 7). If the next track is not the 50th track (step 6), the above operations (steps 2 to 6) are repeated.

At this time, if the reproduced signal of one track is written to the memory as it is, a large capacity memory will be required, so as described above, for example, the information is thinned out by address operation and then written to the memory. When the playback and writing to the memory 10b of up to the 49th track are completed, the memory 10b
The capacity of the disk is set to be the digital amount of one track of a video floppy. Next, the process proceeds to step 7 and the recording head 4 is accessed to the 50th rack.

Then, the digital signal is read out from the address of the memory 10b specified by the address control circuit 10c, and is subjected to D/A conversion? :Converted into an analog signal by 110 yen, passed through the catalog creation switch 11, and outputted to the recorded video signal processing circuit 2. The recording video signal circuit 2 performs signal processing, the recording amplifier 3 amplifies the signal, and the recording head 4 records the signal on the 50th track (step 8).
).

For example, as shown in Figure 3, the signal recorded on the 50th track can be obtained by dividing the screen into 49 sections, allocating one track of images to each section, and recording the 49 images from the 1st track to the 49th track. This is a video signal that is made into one image.

As described above, the catalog track (the 50th rack in this example) in which a summary of the contents of all tracks was recorded during recording.
If you create a video floppy, you can check what is recorded on the video floppy by first playing the catalog track at the time of playback, without having to play all 50 tracks.

In the above embodiment, the information is thinned out when writing to the memory, but the amount of information may also be reduced by, for example, taking an arithmetic average.

In addition, in the above embodiment, the catalog track is the 50th)
Although it is used as a rack, it may also be used as a first trunk, for example. This is more effective for a video floppy recorder that automatically enters playback mode when a video floppy is set and starts playing the first track, because playback of the catalog track will automatically start immediately after the video floppy is set.

Furthermore, in the above embodiments, all images are field images, but they may also be frame images. In this case, if the frame images are regarded as two identical field images, they can all be handled in the same way as field images.

Further, in the above embodiment, the catalog track is one track for a 49-split screen, but it may be, for example, two tracks for a 25-split screen. In this case, the number of images that can be recorded is 48 field images, which is one fewer image, but the area to which one track of images is allocated is larger than in the case of one track with a 49-split screen, and the content can be expressed more clearly. becomes possible.

Further, in the above embodiment, the recorded signal is a video signal, but in addition to the video signal, compressed audio signals or data may also be recorded on the video floppy. In this case, by color-coding one section of the split screen corresponding to the track or inserting special characters, it is possible to similarly display the usage status of the track.

Effects of the Invention As is clear from the above-described embodiments, the present invention allows the contents recorded on a video floppy disk and the usage status of the tracks to be confirmed at a glance by reproducing the catalog track. This eliminates the hassle of having to play back all 50 tracks and check the recorded contents each time a disc is inserted.

Furthermore, since this method is compliant with the format, even a recorder/player that cannot record catalog tracks can reproduce it without any problems.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a video floppy recording and reproducing apparatus according to an embodiment of the present invention, FIG. 2 is a flowchart for creating a catalog track, FIG. 3 is an example of an image to be recorded on the catalog track, and FIG. 4 1 is a block diagram of a conventional video floppy recording and reproducing apparatus. 2...recording video signal processing circuit, 4...
... Recording head, 6... Playback head,
8... Reproduction video signal processing circuit, 10...
...Memory circuit, 1ob...Memory,
10c...Address control circuit, ]1...
...Catalogue creation switch, 12...Control circuit. Name of agent: Patent attorney Shigetaka Awano (1 person)

Claims (1)

[Claims] a recording medium having a plurality of tracks for signal recording and at least one catalog track for recording a part of the recorded content of each signal recording track; a recording means for recording signals on the tracks on the recording medium; a reproduction means for reproducing signals recorded on each track of a recording medium; a storage means for temporarily storing reproduction signals obtained from the reproduction means; and a reproduction means for reproducing signals recorded on each track of the recording medium; The signals are sequentially reproduced by the reproduction means, the information of the reproduced signal is reduced, and the information is provided to the storage means, and the data stored in the storage means is read out and provided to the recording means, and the data is recorded on a catalog track on the recording medium. 1. A signal recording and reproducing apparatus, comprising: a control means for controlling the signal recording and reproducing apparatus.