JPH01237902A - Information recording system - Google Patents

Abstract

PURPOSE:To re-constitute so that a non-recorded section cannot be included on the way in the sequence from a relatively preceding section by operating a recording information saving means, an erasing means and an information re-recording means repeatedly in a prescribed sequence at the time of the necessity. CONSTITUTION:A magnetic head 12 executes the reading action of information with a command from a keyboard 44, the information is given through a pre- amplifier 14 to an empty track detecting circuit 40, the circuit 40 distinguishes whether the track is not recorded or already recorded and inputs it to a system controller 42. The controller 42 reads information (5) to position immediately after the non-recorded section and stores it to a field memory 26. The information (5) is read from a disk 10, the said track is erased and next, the information (5) is stored into the non-recorded section. Next, the controller 42 distinguishes whether or not the already recorded section is remained after the non-recorded section or the non-recorded section column at said time point, and when it is judged that the section is remained, the action is repeated and when it is judged that the already recorded section is not remained, the action is completed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is directed to the recording of sequential information on a floppy disk, for example, in response to a predetermined group of recorded information, such as a video signal for each field. An information recording system in which a predetermined section (one track on the upper side) in a recording area having a plurality of sections set according to a predetermined sequence on the information recording medium, such as a track, is allocated. The information recording system concept also includes devices for reproducing and recording image signals using electronic still cameras.

In particular, the present invention relates to a technique for performing operations such as organizing the recording state on the information recording medium in the information recording system as described above.

[Prior Art] Recorded information for each predetermined group, such as a video signal for each field, is recorded on an information recording medium such as a floppy disk.
Various information recording systems such as electronic still cameras have already been proposed (for example, Japanese Patent Publication No. 63-1661), which records information in correspondence with successive recording sections (recording tracks) in the information recording area. Typically in this type of system,
Sequential recording sections (each recording track) on the information recording medium can be selectively erased as desired.

Alternatively, when recording is performed intermittently in sequential recording sections without following the order (for example, from the outer track toward the inner track), leaving unrecorded sections in between. It is also possible.

[Problems to be Solved by the Invention] In this type of information recording system, when recording sections are selectively erased or recorded intermittently, in either case, the information recording medium has the following problems: A state in which recorded sections and unrecorded sections are mixed appears in the sequential recording sections (recording tracks) in the information recording area. If the recording on the information recording medium is in such a state, the means for detecting an unrecorded section (remaining capacity of the information recording medium) on the information recording medium becomes complicated. Furthermore, in a system that reproduces information using a pickup means, when sequentially reproducing recorded information, unnecessary signals are generated due to the fact that some of the sequential recording sections (recording tracks) to be reproduced are unrecorded. In order to prevent this from being outputted, the pickup means must be skip-fed, which complicates the system configuration.

The present invention has been made in view of the above-mentioned points, and an information recording medium in which recorded sections and unrecorded sections are mixed is loaded in sequential recording sections (recording tracks) in an information recording area. The purpose is to provide an information recording system that can sometimes automatically perform operations such as organizing the recording state.

[Means and effects for solving the problems] In order to achieve the above object, the present invention provides information that is set according to a predetermined sequence on the information recording medium corresponding to each predetermined group of recorded information. A recording system in which a predetermined section in a recording area having a plurality of sections is allocated [among the unrecorded sections or the unrecorded section string in the sequence of the above sections. Recorded information saving means for saving and retaining information stored in a recorded partition located immediately after the first partition or block row in a predetermined saving area; Recording to this saved information storage partition after the completion of the saving. an erasing means for performing an information erasing operation; and an information re-recording means for storing the recorded information evacuated and held in the evacuation area in an unrecorded section located in the most preceding order in the partition series of the recording area. By repeatedly operating the recorded information saving means, erasing means, and information re-recording means in a predetermined order if necessary, the series of recorded sections in the recording area of the recording medium is restored to its original order. While maintaining the order in the series, the partitions can be reconfigured in order from the relatively preceding partitions so that no unrecorded partitions are included in the middle.

Embodiment FIG. 1 is a block diagram showing an overview of a still video floppy disk system, which is an information recording system according to an embodiment of the present invention. A magnetic head 12 is provided for sending and receiving information to and from the floppy disk 10. Concentric annular recording tracks are formed on the recording surface of the floppy disk 10, which is the recording area. On the loaded floppy disk, the first track and the second track are recorded in order from the outermost recording track.

An order series is set for each track as a recording section, such as the third track, . . . , the innermost track, and so on. As mentioned above, this information recording system is a still video floppy disk system, and field image information as a group of information is recorded in FM on each track as the recording section. As in known systems of this type, the magnetic head 12 is moved in the radial direction of the floppy disk by a head access mechanism (not shown) to send and receive information to and from a target track. A preamplifier 14 for amplifying the reproduction signal from the magnetic head 12 and a preamplifier 16 for amplifying the recording signal to the magnetic head 12 are provided, respectively. It is configured to be selectively connected to the magnetic head 12.

An FM demodulation/signal separation circuit 20 is connected to the output line of the preamplifier 14. This FM demodulation/signal separation circuit 20 demodulates the reproduced FM signal to produce a Y signal (in this example,
luminance signal and synchronization signal) and C signal (in this example, R-Y
/B-Y color difference line sequential signal). An A/D conversion circuit 22 that converts the Y signal and C signal into digital signals is connected to the output side of the FM demodulation/signal separation circuit 20. The Y signal and C signal converted into digital signals by this circuit 22 are applied to a field memory 26 via a switch circuit 24.

The field memory 26 is capable of recording field image information for one disk recorded on one recording track of the above-mentioned floppy disk. The digital Y and C signals read from the field memory 26 are input to the corresponding D/A conversion circuits 28 and 30 in the order described above.

Each output line of the D/A conversion circuits 28 and 30 is connected to the input side of a signal synthesis/FM demodulation circuit 34 via a switch circuit 32. The signal synthesis/FM demodulation circuit 34 synthesizes the analog Y and C signals output from the D/A conversion circuits 28 and 30 to form a composite video signal, which is FM-modulated and output. The FM modulation output or the erase signal output from a separately provided erase signal generation circuit 36 is connected to be selectively input to the preamplifier 16 by a changeover switch 38. On the other hand, the reproduced signal output from the preamplifier 14 is also applied to an empty track detection circuit 40. This empty track detection circuit 40 includes the preamplifier 14
Based on the envelope level of the playback signal output of
It is given as an input signal for 2. The system controller 42 includes a microprocessor, and provides control signals to each of the above-mentioned switch circuits and signal processing circuits to collectively control the system. In FIG. 1, the signal line for this purpose is omitted.

The system controller 42 also receives operation signals from a keyboard 44 for the user to operate the system, and also receives input from the field memory 2.
The address generator 46 is configured to issue a control signal to an address generator 46 for accessing the memory by issuing an address signal to the address generator 6.

In the above configuration, the recorded information saving means in the concept of the present invention is the field memory 26. The erasing means is configured by the address generator 46 and the necessary functional units of the system controller 42, and the erasing signal generating circuit 36.
The information re-recording means is controlled by the necessary functional units of the preamplifier 16, the magnetic head 12, and the system controller 42, and furthermore, by the signal synthesis/FM demodulation circuit 34, the magnetic head 12, and the required functional units of the system controller 42, the information re-recording means is Each consists of

Incidentally, as shown in the figure, a television monitor 48 is connected to the output side of the D/A conversion circuit 28 so that the image read out from the field memory 26 at that point in time can be monitored.

FIG. 2 shows how the system of the present invention sequentially records sections in the recording area of the information recording medium (in the example of FIG. 1,
Fill the annular recording track (formed sequentially from the outer circumference on the floppy disk) starting from the section located first in the sequence of recording sections (the outermost track on the floppy disk), and record unrecorded sections in the middle. FIG. 7 is a diagram for conceptually explaining a case where an operation is performed to form a series of recorded partitioned areas without entering any partitions. For convenience of explanation, it is assumed that the first to eighth recording tracks are set in order from the outer circumferential side, but it goes without saying that more tracks than this may be set in an actual system. In Figure 2, (1), (2
), ..., (7), (8) are the numbers of the annular recording tracks formed sequentially from the outer circumferential side on the floppy disk, and the numbers inside the rectangular frames are the numbers representing each image signal recorded on the track. be. In FIG. 2A, this number matches the recording track number. In the figure, × represents an unrecorded track. A block marked with "MEM" represents recorded information saved and held in the save area. That is, in FIG. 2A, the recorded information [1 piece is
Record information [2] is recorded on the second track, record information [5] is recorded on the fifth track, record information [7] is recorded on the seventh track, record information [8] is recorded on the eighth track, and , 3rd
．． The fourth and sixth tracks are unrecorded tracks (empty tracks).

After the recorded information [5] of the fifth track is saved and held in the save area in the state shown in FIG. 2A, the state shown in FIG. 2B is achieved by erasing the fifth track. Next, the recorded information [5] of the save area is stored in the third track, which is the unrecorded section (vacant track) located at the most preceding rank in the section series of the recording area.

As a result, the state shown in FIG. 2C is obtained. In this state, the recorded information [7] on the seventh track is saved and held in the save area, and then the seventh track is erased, resulting in the state shown in the second diagram. Furthermore, the recording information [7] of the save area is stored in the fourth track, which is the empty track located at the most preceding position in the state of the second diagram.

As a result, the state shown in FIG. 2E is obtained. Hereinafter, regarding the record information [8] of the 8th track, record information [5] and [7] will be explained.
] By performing the same operations as described above, the state shown in FIG. 2 G is finally achieved through the state shown in FIG. 2 F.

Looking at FIG. 2G, the system of the present invention can be used to record data in sequential recording sections (circular recording tracks formed sequentially from the outer circumferential side on the floppy disk) in the recording area of the information recording medium in the order series of the recording sections. (the outermost track on the floppy disk)
Fill in the recorded partitions in order from the side, making sure that there are no unrecorded partitions in between.
], [2], [5], [7].

It is easy to understand that tracks [8] are recorded in this order to form tracks 1, 2, 3, and 4.5. Further, according to the system of the present invention, when a series of recorded partition areas are formed by filling them in order as described above and preventing unrecorded partitions from entering in the middle, this series of recorded partition areas The order of records in is the order in the original sequence (1→
2→5→7→8).

Next, with reference to the flowchart of FIG. 3, the operation of the system of the present invention of FIG. 1 will be described when it functions as described with respect to FIG.

First, based on a command from the keyboard 44, the magnetic head 12 moves in the radial direction of the floppy disk by a head access mechanism (not shown), and sequentially performs an operation to read information from all tracks (#1 in FIG. 3). ).

The read information (signal) is applied to an empty track detection circuit 40 via a preamplifier 14. The empty track detection circuit 40 discriminates whether the track being accessed by the magnetic head 12 is unrecorded or recorded based on the envelope level of the reproduced signal output from the preamplifier 14, and sequentially sends a discrimination signal to the system controller 42. input. As a result, information on whether all tracks are unrecorded or recorded is stored in the memory in the system controller 42 as empty track data (#2).

Next, the system controller 42 records the first track, the second track, and the third track in order from the outermost recording track based on the empty track data stored above (#2).
Truck,...

The innermost track is the first partition or partition sequence among the unrecorded partitions or unrecorded partition sequence in the sequence of recording partitions set as the innermost track (the third track in FIG. 2A, The low record section (4th track) located immediately after the
The information [5] stored in the fifth track (in FIG. 2A) is identified, this information [5] is read from the floppy disk 10, and saved and held in the field memory 26, which is a save area. This operation, based on the configuration shown in FIG. 1, is as follows. When the system controller 42 identifies the relevant information [5] as described above, it issues a control signal, causes the magnetic head 12 to access the fifth track of the floppy disk 10, reads out the information [5], and then switches the → changeover switch 18. →Preamplifier 14 →FM demodulation/signal separation circuit 2
The signals are stored in the field memory 26 as digital signals (the above-mentioned Y signal and C signal) through the signal transmission/processing system of the 0-A/D conversion circuit 22 and the switch circuit 24 (#3 and #4 in FIG. 3). . In this storing operation, the address generator 46 controlled by the system controller 42 issues an address signal to the field memory 26 to access the memory.

Read information [5] from floppy disk 1.0,
After the operation of saving and holding data in the field memory 26, which is a save area, is completed, the fifth track is erased. In this erasing operation, the system controller 42 issues a control signal to cause the magnetic head 12 to access the fifth track of the floppy disk 10, and changes the erasing signal output from the erasing signal generating circuit 36 to the changeover switch 38. Preamplifier 16
．． This is done by supplying the magnetic head 12 via the changeover switch 18 (#5 in FIG. 3).

Next, the information [5] saved and held in the field memory 26 is read out and stored in the unrecorded section (third track in FIGS. 2A and B) located at the most preceding rank in the recording section series. To describe this operation according to the configuration shown in FIG. 1, the address generator 46 controlled by the system controller 42 issues an address signal to the field memory 26 to perform memory access, and the data is saved and retained in the field memory 26. The digital Y signal and C signal read out from the field memory 26 are sent to the corresponding D/A conversion circuits 28 and 30 . switch circuit 3
2, the signal is input to the signal synthesis/FM demodulation circuit 34. The signal synthesis/FM demodulation circuit 34 is a D/A conversion circuit 28
and 30 outputs in analog form are synthesized to form a composite video signal, which is FM modulated and output. This FM modulation output signal is the switching length switch 3
8. Preamplifier 16. The storing operation is performed by supplying the magnetic head 12 via the changeover switch 18 (#7 in FIG. 3).

In this next step, the system controller 42 determines whether or not a low-recording section remains after the unrecorded section or the row of unrecorded sections at that point in time (#8 in FIG. 3).
.

If it is determined that a low recording section remains, the operations from #1 in FIG. 3 described above are repeated. That is, the system repeats the above-described operations based on newly stored empty track data from the empty track detection circuit 40. When the system reaches a point where it is determined that no low recording partitions remain, the system terminates its operation.

As a result of the above, the sequential recording sections in the recording area of the information recording medium (the circular recording tracks formed sequentially from the outer circumferential side on the floppy disk) are divided into the sections located first in the sequence of recording sections (the floppy disk A series of recorded edge sections (in this example, recorded information [1], [2], [5 pieces, [7], [8
] are recorded in this order to form the first track 2.3.4.5. In addition, when a series of recorded edge division areas is formed by filling them in order as described above and making sure that no unrecorded divisions are included in the middle, the recording order in this series of recorded edge division areas will be changed to the original order. The order in the order series (1 ko, 2 ko [5 ko [7J-[8 ko]) is maintained.

The embodiment shown in FIG. 1 uses a pickup means (magnetic head 12
), but as mentioned above, a series of recorded edge sections are formed in the recording area of the information recording medium, so when the recorded information is sequentially reproduced, the sequential recording sections to be reproduced are There is no need to skip feed the pickup means to prevent unnecessary signals from being output due to some of the recording tracks being unrecorded. System configuration becomes very easy.

Although the embodiment shown in FIG. 1 above uses a floppy disk as the information recording medium, the idea of the present invention is universally applicable regardless of the type of information recording medium. For example, magnetic drums, hard disks, magneto-optical recording media.

It may also be a solid state memory or the like.

[Effects of the Invention] According to the present invention, sequential recording sections (
When an information recording medium in which recorded sections and unrecorded sections are mixed is loaded on a recording track), operations such as organizing the recording state are automatically performed, and the recording area of the recording medium is A series of recorded sections can be reconfigured in order from the relatively preceding section while maintaining the order in the original sequence, so that no unrecorded sections are included in the middle. It becomes easy to check the remaining amount.

Note that in the present invention, the original section in which the re-recorded information was recorded is erased, but it is also possible not to perform this erasure without following this technical idea. technically possible

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an overview of a still video floppy disk system which is an information recording system as an embodiment of the present invention, and FIG.
In the sequential recording sections in the recording area of the information recording medium (in the example of FIG. 1, annular recording tracks formed sequentially from the outer circumferential side on the floppy disk), the section located first in the sequence of recording sections. This section conceptually explains the operation of forming a series of recorded edge sections by filling them in order from the outermost track on a floppy disk and avoiding any unrecorded sections in the middle. FIG. 3 shows that the system of the present invention shown in FIG.
2 is a flowchart for explaining the operation when functioning as explained with reference to FIG. 2; 10... Floppy disk 12... Magnetic head 20... FM demodulation/signal separation circuit 22... A/D conversion circuit 26... Field memory 28. 30... D/A conversion circuit 34. ... Signal synthesis/FM demodulation circuit 36 ... Erasing signal generation circuit 40 ... Empty track detection circuit 42 ... System controller 46 ... Address generator

Claims (1)

[Claims] A predetermined one section in a recording area having a plurality of sections set according to a predetermined sequence in the information recording medium is assigned to correspond to each predetermined group of recorded information. An information recording system configured to store information in a recorded partition located immediately after the first partition or partition sequence among the unrecorded partition or unrecorded partition sequence in the sequence of partitions. recorded information evacuating means for evacuating and holding the stored information in a predetermined evacuation area; an erasing means for performing an operation of erasing the recorded information on this evacuated information storage section after the evacuation is completed; Information re-recording means for storing the recorded information in an unrecorded section located in the most preceding order in the division series of the recording area, wherein the recorded information saving means, the erasing means, and the information re-recording means are arranged in a predetermined manner. By repeating the operation in the order of , if necessary, the series of recorded sections in the recording area of the recording medium is changed in order from the relatively preceding section, while maintaining the order in the original order series. An information recording system characterized in that the information recording system can be reconfigured so that an unrecorded section is not included in the information recording system.