JP4076653B2 - Digital signal storage method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a digital signal storage method and storage device, and more particularly, to a digital signal storage method and storage device for storing auxiliary information related to storage of a video signal as main information in a storage medium.
[0002]
[Prior art]
When storing a video signal as a digital signal, there are the following conventional examples of a digital signal storage method and storage device for storing auxiliary information related to storage of the video signal together with main data of the video signal.
[0003]
According to Japanese Patent Laid-Open No. 10-79175, the video signal is stored on the magnetic tape in units of data blocks, and the auxiliary information of the video signal is stored on the magnetic tape in units of a fixed-length pack shorter than the data block. Each time the video signal is stored on the magnetic tape, the encoder temporarily stores the auxiliary information of the video signal in association with the identification information of the storage medium. After that, the encoder collectively reads the auxiliary information of the video signal having the identification information of the same magnetic tape from the memory, and stores the read auxiliary information in the form of a pack in the subcode area of the magnetic tape having the identification information. The technology is described.
[0004]
[Problems to be solved by the invention]
However, if the auxiliary information is managed in association with the identification information of the storage medium as in the above-described device, the user must manage the identification information of the storage medium. Further, when the auxiliary information data is large, for example, when one frame of a still image of the video signal stored in the auxiliary information is included, a large number of memories must be stored unless a large-capacity memory is installed in advance. There is a problem that it is difficult to manage media simultaneously.
[0005]
The present invention has been made in view of such a situation, and enables a user to store auxiliary information data having a relatively large capacity without managing identification information of a storage medium. .
[0006]
[Means for Solving the Problems]
The present invention provides means for solving these problems, and the invention of each claim constitutes the following technical means. To achieve the above object, a digital signal storage method according to claim 1 according to the present invention stores main data as main information in a storage medium in units of data blocks, and auxiliary information of the main data as data blocks. A digital signal storage method for storing in a storage medium in pack units of a fixed length shorter than that, and storing auxiliary information after each main data.
[0007]
According to a second aspect of the present invention, there is provided a digital signal storage method according to the present invention, wherein main data as main information is stored in a storage medium in units of data blocks, and auxiliary information of the main data is stored in pack units of a fixed length shorter than the data blocks. In the digital signal storing method for storing in the storage medium, the auxiliary information of all main data is stored after each main data.
[0008]
According to a third aspect of the present invention, there is provided a digital signal storage method according to the present invention, wherein main data as main information is stored in a storage medium in units of data blocks, and auxiliary information of the main data is stored in a unit of a fixed length shorter than the data blocks. And storing the auxiliary information of a plurality of main data (including the main data) stored after the main data before the main data, After the main data, auxiliary information of a plurality of main data (including the main data) stored before the main data is continuously stored.
[0009]
A digital signal storage method according to a fourth aspect of the present invention is the digital signal storage method according to any one of the first to third aspects, wherein the date and time information stored in the auxiliary information of the main data is entered and overwritten. It is characterized in that it is used for judgment when the auxiliary information is updated.
[0010]
The digital signal storage method according to claim 5 of the present invention is the digital signal storage method according to any one of claims 1 to 3, wherein each auxiliary information is updated when new main data is stored. Therefore, when an auxiliary information update flag is provided in the storage medium or auxiliary information storage means and the storage medium on the tape is used as the storage medium, when an operation for the purpose of fast forward, rewind, reproduction or update is performed The feature is that each auxiliary information is updated.
[0011]
According to a sixth aspect of the present invention, there is provided a digital signal storage device according to the first aspect of the present invention, wherein a magnetic head is attached to a rotary drum, a signal is helically recorded on a magnetic tape by the magnetic head, and a recorded signal is reproduced. Helical track signal recording / reproducing means, and a second fixed track signal recording / reproducing means for recording a signal in the longitudinal direction of the upper or lower part of the magnetic tape by a fixed head and reproducing the recorded signal In the digital signal recording / reproducing apparatus, the auxiliary information associated with the main information is recorded in the first helical track recording / reproducing means prior to recording / reproducing the main information including at least the video signal or the audio signal. Auxiliary information processing means for recording / reproducing information, auxiliary information storage means for temporarily storing various auxiliary information of the storage medium in the main body, and the second fixed track Recording / reproducing means for recording and reproducing auxiliary information determination information indicating whether or not the auxiliary information is recorded and index start information indicating the start of the auxiliary information prior to recording and reproducing the main information. And a control information processing means.
[0012]
A digital signal storage device according to a seventh aspect of the present invention is the digital signal storage device according to the sixth aspect, wherein a tape-like storage medium is used as the storage medium and the auxiliary information is stored in the storage medium and then stopped. It is characterized by rewinding to the head of the auxiliary information storage position.
[0013]
A digital signal storage device according to an eighth aspect of the present invention is the digital signal storage device according to the sixth aspect, wherein a tape-shaped storage medium is used as the storage medium, and fast-forwarding or rewinding for searching the main data is performed. When stopping, after reading the auxiliary information of the main data, it stops at the head position of the main data.
[0014]
A digital signal storage device according to a ninth aspect of the present invention is the digital signal storage device according to the sixth aspect, wherein a tape-shaped storage medium is used as the storage medium, and the auxiliary information is automatically transmitted after the storage medium is inserted into the apparatus. After the data is read, it stops at the head position of the main data.
[0015]
A digital signal storage device according to a tenth aspect of the present invention is the digital signal storage device according to the sixth aspect, wherein a tape-shaped storage medium is used as the storage medium, and the auxiliary information storage position is taken out when the storage medium is taken out from the apparatus. Rewinding to the top of
[0016]
DETAILED DESCRIPTION OF THE INVENTION
An example of an embodiment of a digital storage method and a storage device according to the present invention will be described below with reference to FIGS.
[0017]
FIG. 1 shows a first embodiment of a digital storage method according to the present invention, which is an example of a configuration for storing auxiliary information data in a storage medium. As a storage medium, a magnetic tape has been described as an example, but the present invention is not limited to this. The timing of storing the auxiliary information in the storage medium may be any of when the storage medium is rewound, reproduced, fast-forwarded, or when the medium is operated for the purpose of writing separately. The method of recording the auxiliary signal of the present invention during “reproducing”, “fast-forwarding”, and “rewinding” is performed as follows.
[0018]
In each mode, the operation is performed while detecting the index signal on the control track. When the index signal is detected, each mode is temporarily stopped and the auxiliary information writing operation is started. First, from the index signal, the tape is moved to the head position where auxiliary information is described. In the case of FIG. 1, if the auxiliary information described is older than the contents temporarily stored in the main body, Update. Do not update if it is the same or newer. When the update process is finished, the operation mode is continued again. This operation may be performed manually or automatically. Recording is performed using a conventional method.
In (a), when recording a TV program or the like from the beginning of the tape, after securing an appropriate area for storing auxiliary information (TOC information) of the entire tape, the auxiliary information of program A is stored in the auxiliary information storage means. 1 (start position information, storage start date / time information, recording channel information, and other auxiliary information) are stored. The timing of storing may be any timing such as when a tape for recording is inserted or in a standby state when storing on the tape.
[0019]
Subsequently, program A information is stored on the tape. FIG. 3 shows an example in which auxiliary information is stored in the auxiliary information storage means when a recording tape is inserted into the storage device. When the storage of the information of the program A is completed, the auxiliary information 2 of the program A (end position information, storage end date / time information and other auxiliary information, etc.) is stored in the auxiliary information storage means. Subsequently, auxiliary information (auxiliary information of program A) stored in the auxiliary information storage means is written on the tape.
[0020]
After the end of writing, the area including the auxiliary information area of program A in the previous period secures a series of areas sufficient to store the auxiliary information (TOC information) of the entire tape, and enters the next recording standby state. When the next reservation information is entered, the auxiliary information 1 relating to the program B is first stored in the auxiliary information storage means in addition to the auxiliary information relating to the program A, as in the above case.
[0021]
Subsequently, the program B information is stored on the tape. When the storage of the program B information is completed, the auxiliary information 2 of the program B is added to the auxiliary information storage means. Subsequently, auxiliary information (auxiliary information of program A and auxiliary information of program B) stored in the auxiliary information storage means is written on the tape. After the writing is completed, the area including the auxiliary information area in the previous period secures a series of areas sufficient to store auxiliary information (TOC information) of the entire tape, and enters the next recording standby state. As with the programs A and B, auxiliary information is also stored for the program C. Therefore, as shown in FIG. 5A, auxiliary information of the program written from the beginning of the tape is written at the end of the program.
[0022]
After the program auxiliary information is written, the tape can be stopped in the following two ways. One is a case of stopping immediately after writing auxiliary information and a case of stopping in a state where the auxiliary information is returned to the storage start position of the last auxiliary information.
[0023]
When stopping immediately after writing auxiliary information. This is convenient when there are a plurality of reservations so that recording can be performed immediately. When this method is used, when the tape is taken out for the EJECT operation, the tape is taken out after returning to the last auxiliary information storage start position.
[0024]
When the tape stops after returning to the storage start position of the last auxiliary information. When stopping by this method, the tape is taken out as it is in the EJECT operation.
[0025]
By the above two stop and eject methods, the auxiliary information can be read immediately in the storage device main body when the tape is once taken out and then inserted again.
[0026]
After the tape is inserted, the storage device body reads the auxiliary information from the tape, stores it in the auxiliary information storage means, and puts the tape in a stopped state at the position where the program is stored.
[0027]
Also, when the auxiliary information is stopped immediately after writing, and nothing is performed during the EJECT operation, after the tape is inserted, the auxiliary information is read from the tape after returning to the storage start position of the last auxiliary information, and the auxiliary information is stored. The tape is stopped at the position where the program is stored and stored.
[0028]
Further, when a new program is stored, an auxiliary information update flag is set to clearly indicate that the auxiliary information is changed. When fast forwarding or rewinding is performed with the auxiliary information update flag set, the system stores the auxiliary information stored last in the auxiliary information storage means in the auxiliary information storage area. Or go update. It is also conceivable to store or update auxiliary information when performing an operation for the purpose of reproduction or updating of auxiliary information.
[0029]
The location of the auxiliary information update flag is set when the auxiliary information update flag is set in the auxiliary information storage means of the main body, when the auxiliary information update flag is set in the control signal of the storage medium, and among the auxiliary information of the storage medium. There are three cases where the auxiliary information update flag is set in
[0030]
First, when a program is newly stored in the storage medium, the auxiliary information update flag of the main body is set for each area. Operations such as rewinding and fast-forwarding are performed, and the auxiliary signal is written and updated by the above-described operations associated therewith. The auxiliary information update flag in each area where the auxiliary signal is written and updated is reset.
[0031]
When the storage medium is removed from the main body, an auxiliary information update flag is set in the control track of the storage medium when the position of the helical track of the storage medium to be removed is in the middle of the stored program. In the case of auxiliary information in which the position of the helical track of the storage medium is stored, an auxiliary information update flag is set as part of the auxiliary information. The information of the auxiliary information update flag is uploaded to the main body when the storage medium is stored in the main body next time, and prompts the user to update the auxiliary information.
[0032]
This is shown in (b). Information written after each program is rewritten from program A to all auxiliary information.
[0033]
FIG. 2 shows a second embodiment of the digital storage method according to the present invention, which is an example of a configuration for storing auxiliary information data in a storage medium.
[0034]
The method of storing auxiliary information in the storage medium during recording is almost the same as the storage method of FIG.
[0035]
The major difference is that the area for storing auxiliary information is divided into two. That is, immediately after the program, the auxiliary information of all the programs stored before the area for storing the auxiliary information including the program is stored. Further, before the program, auxiliary information of all programs stored after the area for storing auxiliary information, including the program, is stored. These auxiliary information may be stored continuously, or a separate area for distinguishing between the areas for storing the auxiliary information of both may be provided.
[0036]
The auxiliary information storage means capacity described with reference to FIGS. 1 and 2 is determined by each system according to the number of main data stored in the storage medium and the number of data of various auxiliary information. Further, as the area for storing auxiliary information (TOC information) of the entire tape, an area corresponding to the capacity of the storage medium is set automatically or manually. The same applies to the area for storing other auxiliary information.
[0037]
FIG. 3 shows an embodiment of a flowchart showing a series of operations from the timer recording reservation standby state (step 1) to the timer recording standby state (step 21). Note that the operation flow is not limited to this.
[0038]
The digital storage device stands by in the timer recording reservation standby state (step 1). When the user inputs reservation information using the remote controller or the input means of the apparatus main body, this is detected (step 2), and the reservation information is temporarily stored in the auxiliary information storage means of the main body (step 3). In this state, it waits for insertion of a tape. If the tape has already been inserted, check the tape information such as whether it is a writable tape and whether the remaining recording time is sufficient, and then attach the auxiliary information stored in the tape. Check.
[0039]
First, when the insertion of the tape is detected (step 4), the apparatus main body checks whether or not auxiliary information is present on the inserted tape (step 5).
[0040]
If the tape is used for timer recording by this apparatus, auxiliary information should always be stored at the beginning. If there is no auxiliary information, it may be either a new tape (starting position) or a video recorded by another device, or a video recorded by this apparatus but forcibly stopped for some reason.
[0041]
Accordingly, if there is no auxiliary information, the head position is the first position, and there is no video signal, it is determined that the head position is a new tape, and in step 10, an area of auxiliary information (TOC information) for the entire tape is secured. Subsequently, after storing various auxiliary information in the auxiliary information storage means (step 11), the timer recording standby state is entered (step 21).
[0042]
If there is no auxiliary information and there is a video signal at the head position, it is considered that the video was recorded by another device. After confirming whether or not it can be overwritten (step 8), overwriting is performed to step 10 if it is acceptable. If not, proceed to Step 9 tape EJECT.
[0043]
If there is no auxiliary information and it is not the head position, it is either recorded by another device or recorded by this apparatus but forcibly stopped for some reason. Therefore, if it is possible to overwrite (step 12), various auxiliary information is stored in the auxiliary information storage means (step 13), and then the area of auxiliary information (TOC information) for the entire tape is secured (step 14). The timer recording standby state is entered (step 21).
[0044]
If it is not desired to overwrite, it is selected whether fast forward or rewind is performed until auxiliary information is acquired (step 15). If auxiliary information is not acquired, the tape is ejected (step 16).
[0045]
When acquiring auxiliary information, it moves to the auxiliary information storage position by fast forward or rewind (step 17). Subsequently, the auxiliary information is read from the tape and stored in the auxiliary information storage means of the main body (step 18). The user confirms the auxiliary information, selects a place where overwriting is allowed, and cues the position. Various auxiliary information is stored in the auxiliary information storage means (step 19). The tape is set at the program storage position (step 20), and the timer recording standby state is entered (step 21).
[0046]
After the tape is detected to be inserted (step 4), if the inserted tape has auxiliary information (step 5), the auxiliary information is read from the tape and stored in the auxiliary information storage means of the main body (step 18). The user confirms the auxiliary information, selects a place where it can be overwritten or an unused part, and cues the position. Various auxiliary information is stored in the auxiliary information storage means (step 19). The tape is set at the program storage position (step 20), and the timer recording standby state is entered (step 21).
[0047]
As described above, a series of operations from the timer recording reservation standby state (step 1) to the timer recording standby state (step 21) is performed.
[0048]
FIG. 4 shows an embodiment of a flowchart showing the operation from the timer recording standby state (step 21) to the end of timer recording, storing auxiliary information and stopping (steps 34, 41, 48). . Note that the operation flow is not limited to this.
[0049]
The device main body in the timer recording standby state (step 21) remains in the standby state until the timer reserved time comes. The start time is detected from the timer processing unit inside the device main body to the system control unit of the main body, and timer recording is started (step 22). The system control unit instructs the fixed track signal recording / reproducing means to store the VISS signal, and the fixed track signal recording / reproducing means records the VISS signal on the control track by the control head (step 23). Subsequently, program recording is started (step 24), and the signals from the video and audio signal processing units are spirally stored in the helical track of the tape by the drum through the helical track signal recording / reproducing means.
[0050]
The stop time is detected from the timer processing unit inside the device main body to the system control unit of the main body, the timer recording stop is activated (step 25), and the program recording is stopped (step 26). The auxiliary information processing means stores auxiliary information such as the tape stop position, recording time, date and time in the auxiliary information storage means (step 27). The auxiliary information processing means reads all auxiliary information again from the auxiliary information storage means, and spirally stores the auxiliary information on the helical track of the tape by the drum through the helical track signal recording / reproducing means (step 28).
[0051]
This completes the timer recording of one program. It is confirmed whether there is another timer reservation (step 29), and if there is, the operation from step 21 to step 28 is repeated.
[0052]
When all timer reservations are completed, an auxiliary information update flag is set (step 30). Here, two types of auxiliary information update flags will be described as an example, from the beginning to the new storage area (before the auxiliary information update flag) and from the new storage area to the end (after the auxiliary information update flag). The auxiliary information update flag is intended to update auxiliary information stored in all areas of the tape. The entire storage area of the tape is divided into a plurality of blocks, and an auxiliary information update flag is set for each block. It may be provided.
[0053]
When the timer recording is completed in the middle of the tape, the auxiliary information update flag (before and after) is set. If the tape is over, set only the auxiliary information update flag.
[0054]
After setting the auxiliary information update flag (before and after), the main body enters a command waiting state (step 31).
[0055]
If a stop command is detected (step 32), the system is rewound to the beginning of the auxiliary information storage position (step 33) and the system is stopped (step 34).
[0056]
If a fast forward command is detected (step 35), the tape is fast forwarded until a VISS signal is detected. When the VISS signal is detected (step 36), the fast-forward operation is stopped and matched with the start position of the auxiliary information (usually, since the stop cannot be performed immediately after the VISS is detected, an operation of rewinding to the start position is performed). In the main body, auxiliary information is read from the tape and stored in auxiliary information storage means.
[0057]
Here, the information stored in the main body is updated and stored (step 37). If there is a change content, the auxiliary information is returned to the start position of the auxiliary information again, the updated content is stored again on the tape (step 38), and it is confirmed whether it is the final position of the tape (step 39). This operation (step 36 to step 39) is repeated until the final position of the tape is reached. When the final position is reached (step 39), the auxiliary information update flag (after) is reset (step 40) and stopped (step 41).
[0058]
If a rewind command is detected (step 42), the tape is rewound until a VISS signal is detected. When the VISS signal is detected (step 43), the rewinding operation is stopped and matched with the start position of the auxiliary information (usually, since it cannot be stopped immediately after the VISS is detected, there is an operation of fast-forwarding to the start position). In the main body, auxiliary information is read from the tape and stored in auxiliary information storage means.
[0059]
Here, the information stored in the main body is updated and stored (step 44). If there is a change content, the auxiliary information is returned to the start position of the auxiliary information again, the updated content is stored again on the tape (step 45), and it is confirmed whether it is the final position of the tape (step 46). This operation (step 43 to step 46) is repeated until the final position of the tape is reached. When the final position is reached (step 46), the auxiliary information update flag (previous) is reset (step 47) and stopped (step 48).
[0060]
As described above, a series of operations from the timer recording standby state (step 21) to the stop of the device (steps 34, 41, and 48) is performed.
[0061]
FIG. 5 shows an example of the configuration of the embodiment of the digital storage device 1 according to the present invention. The reel 2, the tape 3, the drum 4, the control head 5, the reel 6, the display / output unit 7, the video and audio signal processing unit. 8. Helical track signal storage / reproduction unit 9, timer processing unit 10, auxiliary information processing unit 11, fixed track signal storage / reproduction unit 12, auxiliary information storage unit 13, tape drive unit 14, servo control unit 15, system control unit 16 and control information processing means 17.
[0062]
The control information processing means 17 stores the control signal in the control track 100 of the tape 3 via the control head 5 by the fixed track signal storage / reproduction means 12. The control signal designated by the control information processing means 17 is variable in duty by the fixed track signal storage / reproduction means 12. Here, an index signal (hereinafter referred to as a VISS signal) 101 for indicating the recording start position can be stored as a control signal when the recording of the program is started.
[0063]
Further, the VISS signal 101 stored in the control track 100 can be reproduced and detected. The reels 2 and 6 are operated by the servo control unit 15 and the tape drive unit 14, and the system control unit 16 controls the write timing at the start of storage and on / off of the tape drive.
[0064]
The auxiliary information 102 is written to the helical track 200 after the VISS signal 101 is written to the control track 100 by the control information processing means 17. The VISS signal 101 is stored by the fixed track signal storage / reproduction means 12.
[0065]
At this time, the helical track signal storage / reproduction means 9 writes the auxiliary information 102 helically on the tape 3 by the magnetic head via the drum 4 to which the magnetic head is attached. The data to be written is data acquired by the auxiliary information processing means 11 from the auxiliary information storage means 13, and the auxiliary information storage means 13 stores necessary TOC information or video signal data for video index. Timer reservation data and date / time data possessed by the timer processing unit 10 are also fetched into the auxiliary information processing means 11 as auxiliary information and written into the auxiliary information 102.
[0066]
After the auxiliary information 102 is stored, the helical track signal storage / reproduction means 9 usually receives the program data from the video and audio signal processing unit 8 and similarly passes through the drum 4 to which the magnetic head is attached. It is stored helically on the tape 3 by the magnetic head. The stored program data is taken into the helical track signal storage / reproducing means 9 via the magnetic head attached to the drum 4 and reproduced by the video / audio signal processing unit 8 to be displayed on the display / output unit. It is possible to play.
[0067]
Similarly, the data stored in the auxiliary information 102 is processed by the auxiliary information processing means 11 and can be confirmed by the user through the display / output unit 7. Alternatively, the auxiliary information 102 already stored on the tape 3 can be taken in and read out from the helical track signal storage / reproducing means 9 via the magnetic head attached to the drum 4, and the information can be read from the auxiliary information processing means 11, It can also be displayed on the display / output unit 7.
[0068]
The auxiliary information processing means 11 also performs processing related to the update processing of the auxiliary information 102 and the data storage shown in FIGS. The auxiliary information processing means 11 also performs processing for securing the TOC capacity at the head of the tape. First, the capacity of auxiliary information related to one program can be easily obtained by determining items to be stored as auxiliary information. Assuming that the capacity of the auxiliary information related to this one program is V, the maximum capacity of the TOC may be calculated under the following conditions. If the recording time of the storage medium is H and the minimum recording time per program is h (h can be selected as h = 0.25 or 0.5 or 1.0 or 1.5).
TOC capacity = H / h * V
It becomes.
[0069]
The capacity of the helical track that can store data of this value is secured as the capacity of the first TOC. In addition, the auxiliary information 102 area between programs may basically be the same as this value.
[0070]
The auxiliary information storage means 13 is a part for temporarily storing the auxiliary information read from the tape or storing auxiliary information of the newly stored program. It is also this part that manages the auxiliary information flag.
[0071]
The control information processing means 17 performs processing relating to writing and detection of control signals. In the description, only the VISS signal has been described as the control signal. However, auxiliary information determination information regarding whether or not there is a storage area for auxiliary information may be stored in the VISS signal.
[0072]
By including the auxiliary information determination information, it is possible to distinguish the storage position of the auxiliary information from the storage position of the program data.
[0073]
【The invention's effect】
The following effects are brought about by the present invention described above.
[0074]
Since the digital signal storage method according to the invention described in claims 1 to 3 of the present application is configured as described above, relatively large auxiliary information can be managed for each storage medium. There is no need to manage the identification information of the storage medium, which makes it very easy to use.
[0075]
In the digital signal storing method according to the fourth aspect of the present invention, the date and time information of the auxiliary information is compared, so that when the auxiliary information is updated, it can always be updated with new information.
[0076]
In the digital signal storing method according to the fifth aspect of the present invention, auxiliary information is stored when fast-forwarding, rewinding, etc., so that the entire auxiliary information is updated every time new main data is stored. This saves you a lot of time.
[0077]
The digital signal storage device according to the sixth aspect of the present invention does not have a large-capacity memory in advance and can store each storage medium even when managing a large number of storage media storing relatively large auxiliary information at the same time. Management is possible for each medium.
[0078]
In the digital signal storage device according to the invention described in claims 7 to 10 of the present application, the auxiliary information can be smoothly loaded into the auxiliary information storage means of the device without bothering the user.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing (a) storage of auxiliary information at the time of recording in a storage medium and (b) storage of auxiliary information at the time of rewinding in the storage medium of the digital signal storage method according to the present invention. An example in which all stored auxiliary information is stored after each program data is shown.
FIGS. 2A and 2B are configuration diagrams showing (a) storage of auxiliary information during recording in a storage medium and (b) storage of auxiliary information during storage in the storage medium according to the present invention. An example in which all stored auxiliary information is divided and stored before and after each program data is shown.
FIG. 3 shows one embodiment of a flowchart showing a series of operations from the timer recording reservation standby state to the timer recording standby state of the digital signal storing method according to the present invention.
FIG. 4 shows one embodiment of a flowchart showing the operation of the digital signal storing method according to the present invention from the timer recording standby state until the timer recording is completed, and auxiliary information is stored and stopped.
FIG. 5 illustrates an exemplary embodiment of a digital signal storage device according to the present invention.
[Explanation of symbols]
100 control track
101 Index signal (VISS signal)
102 Auxiliary information
200 Helical truck
1 Digital storage device
2 reel
3 Tape
4 drums
5 Control head
6 reels
7 Display / Output section
8 Video and audio signal processing section
9 Helical track signal recording and playback means
10 Timer processing section
11 Auxiliary information processing means
12 Fixed Track Signal Recording / Reproducing Means
13 Auxiliary information storage means
14 Tape drive means
15 Servo controller
16 System controller
17 Control information processing means

Claims (5)

In a tape-shaped storage medium, for each main data, the main data is stored in a first storage area , and auxiliary information corresponding to the main data is stored in a second storage area different from the first storage medium a digital signal storing method for storing in,
The second storage area is arranged after the first storage area for each main data,
All of the auxiliary information corresponding to the main data individually stored in all the first storage areas arranged before the second storage area is stored in the second storage area. A digital signal storing method characterized by storing.   For each of the second storage areas, the auxiliary information stored in the second storage area is stored in another second storage area arranged immediately before the second storage area, 2. The method of claim 1, wherein the medium is rewound. The storage medium includes a third storage area arranged before the first storage area for each main data,
All of the auxiliary information corresponding to the main data individually stored in all the first storage areas arranged after the third storage area is stored in the third storage area. 2. The digital signal storage method according to claim 1, wherein the storage medium is rewound.   4. The digital signal storage method according to claim 1, wherein the date and time information stored in the auxiliary information of the main data is inserted into the auxiliary information of the main data, and is used for determination when updating the auxiliary information when recording by overwriting. And a digital signal storing method. The digital signal storage method according to claim 1, wherein when new main data is stored, an auxiliary information update flag is provided in the storage medium or auxiliary information storage means in order to update each auxiliary information. A digital signal storage method characterized in that, when a storage medium on a tape is used, each auxiliary information is updated when an operation for the purpose of fast forward, rewind, reproduction or update is performed. .

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