JPS61117779A - File controlling system of data recorder - Google Patents

Abstract

PURPOSE:To access optional recorded data at thigh speed by an inputting device by making various data recorded on a tape to a file for each collected data and storing control data relating to each file in a memory. CONSTITUTION:Data signals are recorded successively for each file in recording tracks formed in the oblique direction of a tape, and at the same time, file control data of data signals are recorded on longitudinal direction of the tape. when accessing a specified file by index numbers, the index number and access command are inputted from a keyboard. Then, a CPU21 in a processor unit 20 compares the index registered in a file table in a memory 24 with inputted index, and when they coincide, reads out positional information of the tape corresponding to the index number and supplies to a controlling device. Then, the tape starts running and access is made.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention records various data including physical data, medical data, and value images thereof on a recording medium, for example, a single magnetic tape, and reads this at any time. The present invention relates to a file management method for a data recorder that enables the following.

[Conventional technology]

A magnetic recording/reproducing device that records and reproduces video signals has one recording track formed diagonally on a magnetic tape.
A video signal for one frame is recorded, and a desired frame can be accessed by inputting from a control section by adding an evening/time code to the video signal for one frame. be.

These high-end magnetic recording and reproducing devices can edit recorded images in units of one frame using the time code, so they can edit not only image data but also physical data, medical data, and other various types of data. It can be used as a data recorder to record data signals including images.

[Problem that the invention seeks to solve]

By the way, when a continuous data signal such as an image signal is recorded, it is relatively easy to access a desired recorded video position while visually viewing the TV monitor using the fast forward playback or reverse playback function. When the recorded data relates to physical data, there is a problem in that it is extremely difficult to grasp the entire information from a part of the image.

In particular, when the recorded data or the data to be recorded consists of multiple pieces of data that are not related to each other, a magnetic recording/reproducing device with conventional editing functions is used to read, add, and correct the data. becomes extremely difficult.

This invention was made to solve this problem, and the tape format is configured so that all data recorded on a data recorder using a magnetic recording/reproducing device as a transport can be handled in units called files. The present invention also provides a data recorder management method that allows recorded data to be easily managed.

[Means for solving problems]

A data recorder capable of recording various data in file units on diagonal recording tracks formed on a tape, and recording file management data of the various data on recording tracks formed in the longitudinal direction of the tape. , a control device that controls the tape running mechanism of this data recorder, an input device that can input file management data for recorded data, and a control device that can input file management data recorded on the tape and input file management data. A storage means capable of storing data is provided, and a desired file can be searched for and accessed by specifying a file area formed on the tape using file management data inputted from the input device.

[Effect]

File management data recorded on recording tracks formed in the longitudinal direction and data recorded in file units are formed in corresponding positions on the tape, so this file management data is stored as a file table. If the information is stored in the means, the specified file area can be easily searched using the input device.

Therefore, it becomes extremely easy to access data recorded in file units using the keyboard of the input device, and data addition, correction, setting of a new file area, etc. can be easily performed.

〔Example〕

FIG. 1 shows a schematic diagram for explaining the file management system of the tape recorder of the present invention, and numeral 10 shows various types of data that can be recorded or played back on a magnetic tape wound around a rotating drum, for example. The magnetic recording and reproducing apparatus is equipped with a mechanism for recording and reproducing data signals and file management data in a recording format described later.

Reference numeral 20 designates a processor unit built in for controlling the magnetic recording/reproducing apparatus 1o, which includes a central processing unit (CPU) 21, a tape position determination section 22.
Tape running control section 23. File management data memory 24
．． Index comparison section 25, serial number comparison section 26
．． In addition, although not shown, it is formed from a signal processing section for recording data and the like.

30 supplies various control data including file management data and recording data to the data recorder consisting of the magnetic recording/reproducing device 1o and the processor unit 20;
Also shown is a controller having a function of displaying signals output from the data recorder, and a display section 31. Input device 32, including a keyboard. It is composed of an interface 33 and the like.

FIG. 2 shows an example of a magnetic tape recording format applied to the file management system of the data recorder of the present invention, in which data is recorded in zone A of the diagonal recording track formed by the rotating head. The B zone indicates the recording area of the vertical blanking signal.

The CTL signal is recorded on the track formed in the longitudinal direction of the magnetic tape between the A and B zones, and three other audio tracks Audl and Aud2 are recorded.
.

Aud3 is similarly formed in the running direction (longitudinal direction) of the tape.

In addition, the diagonally shaded portion of the recording track in the A zone is an index zone IZ, and this index zone IZ has serial numbers (Seg, No.) attached to each frame as shown in FIG. , data size DS, user code UC, synchronization signal 5YNC, parity signal PC, etc. are recorded.

The various data recorded in the A zone are divided into files, and the name of the filed data and the attributes of the data are displayed at the beginning of each file.

The file header (which records the file creation date and other notes regarding the data written to the file)
FH) is formed. Note that a tape header TH is formed at the beginning of one tape, in which the tape label, data type, date, etc. are recorded.

By the way, in the file management system of the data recorder of the present invention, data for managing files can be recorded in the audio track Aud3, and the file area can be searched and accessed at high speed. There is.

The data recorded on this audio track Aud3 is encoded with a sequential number or a keyword for file search, and a tape marker corresponding to the data position recorded in the A zone is also recorded. There is.

The index number Ind.No. indicated by the sequential number or keyword is 1, for example, a 6-digit binary code is assigned as shown in FIG. 4, and a 2-digit binary code is used for the tape marker TM. .

The types of tape markers TM are BOT (Beginn), which indicates the tape header part, as shown in FIG.
ing of tape), EOT (End Of Tape) indicating the end position of tape recording,
7 BOF indicating the beginning position of the fill
ing OfF 1le), EOF (
End Of File) is used to divide the file into blocks, the beginning of this block,
A tape marker called BOB or EOB is also used to similarly indicate the end position.

Since the file management system of the data recorder of the present invention is configured as described above, data recorded on a tape can be managed in file units as shown below.

First, if various data have already been recorded on a tape in file units, insert the tape into the magnetic recording/reproducing device 10 and enter the "Files" command from the keyboard. The data recorder reads the tape marker BOT and records the tape header ( After accessing the location of TH), 5
It runs FWD at 0x speed, and during this running, the management data of each file is read and registered in the file table.

The file management data to be read includes the file number,
These include position information on the tape, index numbers, and the final value of the sequential number assigned to each file. When the tape reaches the EOT position of the tape marker, the tape is reversed, the tape is rewound and stopped at BOT, and a file table for managing files is created in the storage means.

Figure 85 shows a flowchart using this file command.

Next, a case will be described in which a predetermined file is accessed using an index number.

Enter the index number and access command from the keyboard. The CPU in the processor unit 20 compares the input index with the index registered in the file table in the memory. If there is no match, output an error. If there is a matching index number, the tape position information corresponding to the index number is read out and supplied to the control device.

The tape starts running, and when the same position information is detected from the tape, the tape is stopped and the access is completed. FIG. 6 shows a flowchart of such an access command.

When creating a file, you can directly operate the operation panel of the data recorder and input the data signal to be recorded.In this case, input the index number (6 characters) from the numeric keypad on the operation panel. You can add an index number to.

A necessary file area can also be secured by a command from the controller 3o. In this case, enter the index number and file header as parameters from the keyboard.

These data are recorded at the same time when the file area is created.

Note that when an EOF mark (end of file) is detected while data is being recorded in a blank portion (BLK) of a file, the system automatically enters stop mode and is controlled to protect the next file.

You can also add data from the middle of the file. EOB on the part where the patching started.

A BOB mark is recorded as data to indicate a new block area. At this time, sequential numbers are added continuously from the spliced portion.

Therefore, access within a file can be done by inputting sequential numbers,
When accessing blocks, you can also search for BOB marks in order.

〔Effect of the invention〕

As explained above, the file management method in the data recorder of the present invention converts various data sequentially recorded on a magnetic tape into files for each group of data, and stores management data regarding each file in the memory in the processor unit. Since the data can be stored in the form of a file table, there is an effect that arbitrary recorded data can be accessed at high speed using an input device.

Further, additional recording, correction, etc. can be easily performed using the controller, which has the advantage of being highly practical.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of each device in which the file management method of a data recorder of the present invention is adopted; FIG. 2 is a diagram showing recording tracks on a magnetic tape surface showing the recording format of data signals and file management data; Figure 3 is a layout diagram of data recorded in the index zone, Figure 4 is a layout diagram of data recorded in audio track A ud3,
Figure 5. FIG. 6 shows a flowchart for creating a file table and accessing a file. In the figure, 10 is a magnetic recording/reproducing device, 20 is a processor unit, and 30 is a controller. Figure 3 Figure 4 F [NO・NOIM l
-Fig.

Claims (1)

[Claims] A data recorder capable of sequentially recording data signals for each file on recording tracks formed in a diagonal direction of a tape, and recording file management data of the data signals in the longitudinal direction of the tape, and the data recorder an input device capable of inputting file management data for the data signal; and an input device capable of inputting file management data read from the data recorder or file management data input from the input device. and storage means capable of storing,
A control signal is supplied to the control device based on the file management data input from the input device and the file management data stored in the storage means, so that the data recorder can search for a desired file. File management method for data recorders.