JPH0221784A - Information recording system - Google Patents

Abstract

PURPOSE:To display information (picture) of each recording content recorded on the entire recording area (tracks) on a multi-screen by assigning and recording the information representing the recording content of each recording area belonging to a 2nd group into a recording area belonging to a 1st group respectively. CONSTITUTION:A specific recording area in plural recording areas (tracks) set on a recording medium with divisions is referred to as the 1st group area (index track) and the other is referred to as the 2nd group area. Then the information (sampled information) representing the recording content of each recording area belonging to the 2nd group is assigned and recorded in the recording area belonging to the 1st group respectively. Since a prescribed area of the recording medium acts like an index area, the recording state of the entire recording medium is recognized simply and quickly by the reproducing information from the index area.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an information recording system, and more particularly, to an information recording system in which one screen is divided and recording contents on a recording medium are assigned to each area.

[Prior Art] A magnetic recording/reproducing device that records a plurality of independent video signals as magnetized tracks on a single magnetic tape and reproduces the signals to form a plurality of independent videos on the same screen. is already known (Japanese Unexamined Patent Publication No. 47-4171)
(See Publication No. 7).

By the way, in general, in an electronic still camera, one magnetic disk used as a recording medium has, for example, 5
0 tracks are formed, and each track has 1 field image, i.e. 5 tracks in total.
A 0 field image is recorded.

[Problems to be Solved by the Invention] Therefore, when you want to reconfirm all recorded images of 50 fields after recording has been performed on all tracks, it is necessary to sequentially drive the magnetic head for all 50 tracks. It had to be regenerated, which was time consuming and very troublesome.

Of course, even in the magnetic recording and reproducing apparatus described above, it is impossible to view all independently recorded images at the same time.

In view of these problems, an object of the present invention is to provide an information recording method that allows information (pictures) of each recorded content recorded in all recording areas (tracks) to be displayed on multiple screens. .

[Means and effects for solving the problem] In the information recording method of the present invention, a specific recording area is set as a first group of areas among a plurality of recording areas (tracks) that are divided and set on a recording medium. (index track), and everything else is numbered.

There are two groups of areas, and information (sampled information) representing the recorded content of each recording area belonging to the second group is allocated and recorded in the recording areas belonging to the first group.

[Embodiment] FIG. 1 is a block diagram of an electric circuit of an electronic still camera to which the method of the present invention is applied.

In FIG. 1, a solid-state imaging device 1 such as a CCD is driven by a drive circuit 2, and the imaging output from the solid-state imaging device 1 is subjected to gamma correction, white balance adjustment, etc. in an imaging process circuit 3, and is then subjected to Y signal and C signal. separated into The synchronizing signal generating circuit 4 is controlled by a control signal from the CPU 5 and sends a reference clock signal to the drive circuit 2 and the imaging process circuit 3. The Y signal (luminance signal) and C signal (R-Y, B-Y color difference signals sent in the color difference line sequential method) from the imaging process circuit 3 are sent to the CP
The signal is inputted to the modulator 8.9 through the changeover switch 6.7, which is connected to one of the contacts 6a and 7a by the control signal from U5, and is subjected to FM modulation. The outputs of the two modulators 8.9 are added by an adder 10, amplified by a recording amplifier 11, and sent to the CPU via a recording/reproducing switch 12 whose connection is switched to a recording side contact 12a.
The data is recorded on the magnetic disk 14 through the magnetic head 13, which is a recording head, in response to a control signal from 5. At this time, the magnetic disk 14 is rotated by the motor drive circuit 15 being driven by a control signal from the CPU 5.

During reproduction, the magnetic head 1 is controlled by a control signal from the CPU 5.
3 is a reproducing head, and the recorded content is taken out from the rotating magnetic disk 14 by the reproducing head. magnetic head 1
The recorded content reproduced in step 3 is input to the reproduction amplifier 16 through the recording/reproduction switch 12 whose connection is switched to the reproduction side contact 12b, and is amplified. Of this amplified signal, the Y signal is detected by a bypass filter (hereinafter abbreviated as HPF) 17, and the C signal is detected by a band pass filter (hereinafter abbreviated as BPF) 18.

The Y signal and C signal are then sent to the demodulator 19.
After FM demodulation at 20, the process circuit 21.2
2 to remove scratches and distortions. The Y signal that has passed through one process circuit 21 is mixed with the output of a character generator 23 for forming characters such as a track number, as described later, in a mixing circuit 231, and then manually inputted to the field memory 25, and then sent to the other process circuit. The C signal that has passed through the circuit 22 is mixed with the output of the character generator 24 for displaying the track number in colored letters in a mixing circuit 241, and then input to the field memory 26. Field memories 25 and 26 are controlled by a memory control circuit 27. The Y signal and C signal output from the two field memories 25 and 26 are guided to the encoder 28 and converted into NTSC signals, and then outputted from the output terminal 29. Furthermore, as will be described later, the output Y signal and C signal of the two field memories 25 and 26 are transmitted to the other contacts 6b and 7b of the changeover switch 6.7, respectively, in order to dub the recorded image for index use. returned to the side.

The memory control circuit 27 is controlled by a control signal from the CPU 5.
7, as shown in FIG. 2, the l & quasi-click CLK required for writing is generated, and the frequency of this reference clock CLK is set to l/2, 1/3, l/2.
4, each frequency divider 31 for dividing the frequency into l/5, respectively.
~34 are provided. Any one of the outputs of these frequency dividers 31 to 34 is directly used as the write clock WCLK through a changeover switch 35 which is switched by a control signal from the CPU 5, and is also used as a write address WADDRESS by a write address counter 37.

This write clock WCLK and write address WADDRESS are the field memories 25 and 26.
, a write signal for storing one track of reproduced images input from the process circuits 21 and 22 is used.
Sent out. That is, the changeover switch 35 is connected to the contact 35a.
When connected to contact 35b, writing is performed at normal rate, that is, one track worth of images is written without being compressed, and when connected to contact 35b, writing is performed at 1/2 rate.
In other words, the image signal for one track is thinned out and compressed (sampled) by 1/2 in both the horizontal and vertical directions, and is written so that one screen is 1/4 of the normal size. Similarly, the changeover switch 35
is connected to contact 35e, the rate is 115,
By thinning out and compressing one track's worth of image signals to 115 in both the horizontal and vertical directions, one screen is written in the normal size of 1125.

The read clock RCLK for reading the image information written in the field memory 25 and 26 is used as it is without dividing the reference clock CLK, and is also used as the read address RADDRESS by the read address counter 39 that counts the reference clock CLK. Ru. In other words, reading is always performed at the normal rate.

Write address counter 37. The read address counter 39 is reset by a reset pulse signal generated by a drive synchronization set circuit 40 that generates a reset signal based on a pulse signal (so-called PG pulse) obtained in synchronization with the rotation of the magnetic disk 14.

Next, the detailed operation of the electronic still camera will be explained with reference to the flowcharts shown in FIG. 3 and subsequent figures.

Since 50 recording tracks can be formed on the magnetic disk 14, 50 still images can be recorded on one magnetic disk 14 assuming that each recording track consists of one field image. . Therefore, in this electronic still camera, the number of still images recorded on the magnetic disk 14 by imaging is set to 48, and 48 tracks out of 50 are used. The remaining two tracks are used as indexes for viewing the still images recorded on the forty-eight tracks. For this reason, when an operation member for forming an index (not shown) is operated prior to the first image capture, first, as shown in FIG. A signal is generated. “3→2
6" means the track number from the 3rd track to the 26th track. "When the character signal from 3 to 26° is sent to the field memory 25.26, at this time C
The changeover switch 35 is connected to the contact 35e by the PU5, and the character signal is sent to the first address of the field memory 25, 26 at a rate of 115 by the write clock WCLK from the memory control circuit 27 and the write address WADDRESS. written.

After this, the photographer will take the first still image, but at the time of taking the image, the changeover switch 6.7 is connected to the contacts 6a and 7a as described above, and the output of the imaging process circuit 3 is The C signal is FM-modulated by modulators 8 and 9, then added and amplified, and sent to the magnetic disk 14 by the magnetic head 13 via the recording side contact 12a of the recording/reproducing switch 12.
recorded as a field image. In this case, the first and second track positions of the magnetic disk 14 are left open for index tracks to be formed later, and the third track position is first moved to the above-mentioned index track as shown in FIG. A third track is formed by recording the captured images.

When the third track is recorded, the recorded image on the third track is immediately reproduced. That is, CPU5
The recording/reproducing switch 12 is switched to the reproduction side contact 12b, and the recorded information on the third track of the magnetic disk 14 is read by the magnetic head 13 and amplified as described above. The separated Y (No. 8 and C signals are sent to the demodulator 19
．． After being FM demodulated in step 20, the signal is sent to field memory 25.26 via process circuit 21.22 and character generator 23.24. When the recording information of the third track is sent to the field memories 25 and 26, this recording information is transmitted from the memory control circuit 27 to the write clock WCLK and the write address WADDRESS.
As a result, it is written to the second address of the field memory 25, 26 at a rate of 175, similar to the character signal described above.

After this writing, the connection of the changeover switches 6.7 is switched to the contacts 6b and 7b, respectively, and the connection of the recording/reproduction switch 12 is also switched to the recording side contact 12a. After this, the information stored in the field memories 25 and 26 is read out at the normal rate. Reading out at the normal rate means that the entire stored contents of the field memories 25 and 26 are read out to form one screen. This read memory information is stored in the changeover switch 6 connected to the contacts 6b and 7b.
．． 7, recording is performed at the first track position of the magnetic disk 14 via the above-mentioned recording system to form a first track. This completes a series of operations associated with photographing the first still image.

Therefore, if the image of the third track that was initially captured and recorded is a field image as shown in FIG. 5(A), the recorded image of the first track for indexing is as shown in FIG. 5(13). This is an image as shown. That is, if the first track is subsequently played back, the NTSC signal obtained from the output terminal 29 will be as shown in FIG. 5(B).
The track number "3 groan 26" is displayed in the first area of the 25 areas of one field forming one screen, the field image of the third track is displayed in the second area, and the other areas are divided into 25 areas. The signal is as if it were in a non-display state.

Next, when a second image is photographed, the photographed image is recorded on the fourth track position of the magnetic disk 14 to form a fourth track, as shown in FIG. After this,
The recorded contents of the first track, which is the index track, are reproduced. That is, the signals forming the screen shown in FIG. 5(B) above are reproduced. The reproduction signal of the first track is written to the field memory 25, 26 at a normal rate through the above-mentioned reproduction system, and then the recorded information of the fourth track is reproduced. The reproduced recorded information of this fourth track is then written to the third address of the field memory 25, 26 at a rate of 115. In other words,
If the recorded information on the fourth track is an image as shown in FIG. 7(A), this image will be written to the third address of the field memories 25 and 26 at a size of 1/25.

After this, field memory 25°26 at normal rate.
The information written in is read out. Furthermore, the first track is also erased to rewrite the index. The stored information read out from the field memories 25 and 26 at the normal rate is as shown in FIG. 7 (I3). As described above, this information passes through the recording system and is recorded on the magnetic disk 14 at the position of the erased first track, thereby forming a new first track.

In this way, the series of operations associated with capturing the second still image ends.

The above-described operation is performed in the same manner for imaging after ``3 images I''. Then, the 24th image is taken and the second
When an image is recorded at the 6th track position to form the 26th track, the recorded contents of the first track for indexing become as shown in FIG. 8(A), and one screen consists of 25
Each of the images from the third track to the 26th track corresponds to each divided area on a small screen.

Approximately the same operation as described above is performed for the 25th to 48th images. However, in this case, the second track is used as the index track. '48
When the 48th image is completed and the image is recorded at the 50th track position to form the 50th track, the recorded contents of the 2nd track for indexing become as shown in FIG. 8 (Il). , the 27th screen is divided into 25 areas in each area.
Each image from the track to the 50th track corresponds to each other on a small screen. The character "27-50" corresponds to the first area of 25 divisions, which means that recorded images from the 27th track to the 50th track are recorded in this second track for index display. .

As mentioned above, the first track includes the third track to the second track.
Recorded images up to 6 tracks are recorded for index use, and the 27th to 5th tracks are also recorded on the 2nd track.
Recorded images up to track 0 are recorded for index 1
Since the first track is recorded, there is no need to play all the tracks.
．． Images recorded on all tracks can be checked by simply reproducing the second track.

By the way, No. 1. As a result of reproducing the second track and checking the recorded images of all the tracks, there may be cases where it is desired to erase any one of the 48 recorded images from the third track to the 50th track. In such a case, as described below],
Perform piece deletion.

For example, if you want to erase the recorded image on the 20th track, as shown in FIG. 9, when you give a command to erase the 20th track, the magnetic head 13 moves to the position of the 20th track on the magnetic disk 14. This erasing of the image on the second (l rack) is executed.

Even if the recorded image on the 20th track is erased, a small image corresponding to the image on the 2nd Cl rack remains on the 1st track for indexing. The reproduced image is written to the field memory 25, 26 at a normal rate. After this, the first track is erased and the field memory 25.26 is erased at a rate of 115.
For example, the gray color of "blue" is written to the 19th address of . The information stored in this field memory 2526 is then read out at a normal rate. The stored information read at the normal rate is the image information shown in FIG. 10, and this information is transferred to the erased first . Recording is performed at the position of the track and the first track is updated. In this way, one frame erasure is completed.

Furthermore, when erasing one frame from another recording track, the same operation as shown in the flowchart shown in FIG. 9 of Section 2 is executed for the predetermined track. However, when one frame deletion is executed based on the flow shown in FIG. Since the first track for a new index is recorded and formed by performing
This is an image that has been dubbed twice. If one-frame erasure is performed many times, dubbing of the first track is repeated each time one-frame erasure is performed, so that the image quality of the first track gradually deteriorates.

Of course, when erasing one frame from one track from the 27th track to the 50th track, the second
The same can be said for the second track since the track is the target.

FIG. 11 shows a method of erasing one frame that prevents deterioration of the image quality of the index track as much as possible.

For example, if you want to delete the recorded image on the 40th track,
First, an erase command for the 40th track is given, and the image on the 40th track is erased. After this, in order to create a recorded image of the second track for a new index without reproducing the already recorded second track,
7 tracks and write this recorded image to the second address of field memory 25.26 at i15 rate,
Next, play back the 28th track and copy this recorded image to the 11th track.
Write to the third address of field memory 25,26 at rate 5. In the same way, the tracks are played back sequentially up to the 39th track, and the recorded image of the 39th track is also written to the 14th address of the field memory 25.26 at the 115 rate.The 40th track is then written to the 14th address of the field memory 25.26 at the 115 rate. The background color of "blue" is written to the 15th address of No. 26. And after this, the 50th
The above-described operation is performed again up to the 50th track, and the recorded image of this 50th track is stored in the field memory 25 at a rate of 115.
After writing to the 25th address of 25.26, the information stored in this field memory 25.26 is read out at normal rate. Also, at this time, the magnetic disk 14
The image already recorded at the second track position is unnecessary and is therefore erased. The stored information read at the normal rate passes through the recording system as described above, and is recorded at the position of the erased second track of the magnetic disk 14, and the second track is updated to erase one frame. finish.

Therefore, in the case of this one-frame erasing method, no matter how many times one-frame erasing is performed, the image on the index track will remain in the third frame.
Since the image is created by dubbing once based on the recorded images of each track from the track to the 50th track, the image quality of the index track does not deteriorate due to frame erasure.

When the 20th track becomes an empty track due to the above-mentioned 1-frame erasure, when the 1st track is played back, as shown in FIG. Since the 19th area corresponding to the 20th track has a plain "blue" background color, the photographer can know the empty track and record a newly captured image at the same track position.

Incidentally, the number of the empty truck may be displayed so that the track number of the empty truck can be easily known. For example, when applied to the one-frame erase described in FIG. 9, the first
After reproducing the track and writing its image in the field memory 2526 at normal rate, the track number "20°" of the erased 20th track is generated from the character generator 23.24, and then 115
At the rate, send track number 2 to the 19th address of field memory 25.26 with the background color of blue.
0'' is written. Therefore, after this, field memory 2
5.26, the recorded image of the first track that is read out and updated at the normal rate is as shown in FIG. "20" will be displayed.

By the way, in the embodiment shown in FIG. 1 described above, the first . The recorded image on the second track is formed by dubbing based on the image recorded on the other track of the magnetic disk 14.

Since dubbing causes some deterioration in image quality compared to the original image, next we will discuss an electronic still camera that forms index tracks without dubbing.

The electronic still camera shown in FIG. 14 is capable of forming index tracks without dubbing.

The difference between the camera shown in FIG. 14 and the one shown in FIG. 1 is that the output terminal of the Y signal of the imaging process circuit 3 is connected to the contact 41a of the changeover switch 41 provided at the front stage of the field memory 25. Further, the output terminal of the C signal of the imaging process circuit 3 is connected to a contact 42a of a changeover switch 42 provided at the front stage of the field memory 26.

The output terminals of the process circuits 21.22 are connected to contacts 41b, 42b of a changeover switch 41.42, respectively. In other words, either the image information that has just been captured or the image information that has been reproduced after being recorded on the magnetic disk 14 is selectively input to the field memories 25 and 26 via the changeover switches 41 and 42. It is now possible to do so.

Therefore, when the first still image is captured now, as shown in FIG.
Since the recording/reproducing switch 12 is connected to the recording side contact 12a and the changeover switches 41 and 42 are connected to the contacts 41a and 42a, respectively, the image information that has just been captured is transferred to the recording system as shown in FIG. The image information is guided to the magnetic disk 14 via the magnetic disk 14, where image recording is performed on the third track, and at the same time, the captured image information is transferred to the field memory 25.
26 to the second address of this field memory 25.26 at a rate of 115. After this, the stored contents of the field memories 25 and 26 are read out at the normal rate, and the contact 6b.

Recording is performed to the first track position of the magnetic disk 14 via the recording system via the changeover switch 6.7 which is switched to 7b. Therefore, the recorded image on the first track is no longer a result of dubbing, and its image quality is as good as that of the recorded image on the third track.

Note that the character generators 23 and 24 omitted in FIG. 14 are replaced with the character generators 23 and 24, which are omitted in FIG.
Of course, it may be provided before the field memories 25 and 26.

In the above embodiments, an electronic still camera has been described, but the present invention is not necessarily limited to electronic still cameras. For example, as shown in FIG. 16, the imaging section 43 shown in FIGS. 1 and 14 may be replaced with an input section 44 for connection with another imaging device to form a recording/reproducing device. Good too. The input section 44 includes an NTSC signal input terminal 45, a synchronous separation circuit 46, and a synchronous separation circuit 4.
It consists of a YC separation circuit 47 for separating the Y signal and C signal from the NTSC signal at the timing of the output of 6.
As described above, the magnetic disk 14 or the field memory 25 . 26.

Furthermore, the present invention is not limited to those using magnetic recording media such as the magnetic disk 14, but can be applied to various recording and reproducing apparatuses using other recording media.

[Effects of the Invention] As described above, according to the present invention, a predetermined area of a recording medium functions as an index area, so that the recording status of the entire recording medium can be determined using reproduction information from this index area. It can be recognized easily and quickly.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an electric circuit of an embodiment of an electronic still camera to which the method of the present invention is applied, FIG. 2 is a detailed block diagram of the memory control circuit shown in FIG. 1, and FIG. , FIG. 4 is a flowchart of a series of operations accompanying the first still image capturing, and FIGS. 5(A) and (B) are The image pattern of the third track and the image pattern of the first track formed by the flow shown in FIG. 4, FIG. 6 is a flowchart of a series of operations associated with capturing the second still image, (13) is the image pattern of the third track and the image pattern of the first track formed by the flow shown in FIG. 6, FIGS. 8(A) and (B).
) is the image pattern of the 1st track and the 1-frame pattern of the 2nd track after 48 images have been captured from the 3rd track to the 50th track. FIG. 9 is a flowchart showing the operation of erasing one frame. , FIG. 10 shows the image pattern of the first track in which one frame has been erased by the flow shown in FIG. Flowchart I., FIG. 13, shows the operation of writing a track number on an empty track where frames have been erased.
The image pattern of the first track in which the track number is written in the empty track according to the flow shown in FIG. 12 above. FIG. 14 is a block diagram showing an electric circuit of another embodiment of an electronic still camera to which the method of the present invention is applied. , Figure 15 is
A flowchart of a series of operations accompanying the first still image capturing of the camera shown in FIG. 14 above is shown in FIG. FIG. 2 is a block diagram of an input section that can be replaced with an imaging section in the FIG.

Claims (1)

[Claims] (1) Among a plurality of recording areas divided and set on a recording medium, a specific one is defined as an area of a first group, and the other areas are defined as an area of a second group; An information recording method characterized in that information representing the recorded content of each recording area belonging to the second group is allocated and recorded in the recording areas belonging to the first group. (2) Information representing the recorded content of each recording area belonging to the second group is recorded in a memory means separate from the recording medium, and the information recorded in this memory means is transferred to the recording area belonging to the first group. 2. The information recording system according to claim 1, wherein the information is transferred to and recorded on the computer. (3) The information recording system according to claim (1) or (2), wherein the first group of areas is set to include an area to be reproduced in the earliest order on the recording medium. (4) When the recorded content in any of the areas belonging to the second group is erased or changed, the corresponding area in which the information related to the erased or changed area among the areas belonging to the first group is recorded. a first step of reading out information and storing it in the memory means; a second step of rewriting a portion of the stored information related to the erased or changed area with information indicating that the erased or changed area has been carried out; a third step of updating the recorded content of the corresponding area in the first group to that recorded in the memory means after the completion of the second step;
3. The information recording system according to claim 2, wherein the recording in the corresponding area of the first group is updated. (5) When the recorded content in any of the areas belonging to the second group is erased or changed, the information representing the recorded content of each area belonging to the second group is sequentially extracted, and this information is used to The information record according to claim (2), characterized in that the record in the corresponding area of the group is updated, and the portion related to the deletion or change is updated to record contents that can be identified as such. method.