Method for recording, reproducing and managing file data on a recording medium
First Claim
1. A method of recording file data on a non-rewritable recording medium and reproducing the file data recorded on the recording medium, the recording medium having a directory region, on which a directory for managing the file data is recorded, and a file data region, on which the file data is recorded, said method comprising the steps of:
- recording file data on the file data region such that the file data is sequentially recorded every recording unit, each recording unit having a predetermined data capacity and being arranged on the file data region;
recording a directory for managing the recorded file data on the directory region;
detecting, when new file data is to be added into the recorded file data on the file data region to form a series of file data, whether there is a recording unit in which an amount of data recorded thereon during said file data recording step is smaller than the predetermined data capacity;
reproducing file data of the recording unit in which the amount of the recorded file data thereof is smaller than the predetermined capacity, detected in said detecting step, and storing the file data of the detected recording unit;
recording additional file data by adding the new file data to the the file data stored at said reproducing step such that the additional file data is sequentially recorded on respective different recording units in the file data region;
recording an additional directory for managing the additional file data on the directory region; and
reproducing the file data and the additional file data both recorded on the file data region without reproducing the recording unit detected in said detecting step, when a series of data files comprising the file data and the additional file data is to be reproduced by use of the directory and the additional directory.
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Abstract
A file managing method is disclosed. In the method, data is sequentially recorded with a predetermined continuous recording unit basis in a data section, and a flag indicative of addition of file data is provided in directories which manage file data. When data is additionally recorded into existing files, the data to be added is sequentially recorded into a data section as another file. The directories to manage the additional file data are recorded into a directory section by incrementing the flag. In the reproducing mode, the files having the same name and different flags are managed as a single file which has been divisionally recorded in accordance with the order of the numbers of the flags. In the recording mode of the additional data, if an invalid data section exists in the last recording information unit of the file into which the data is added, the data recorded in the last recording information unit is stored into a buffer memory and the data to be newly added is additionally sequentially recorded after the stored data. In the reproducing mode, the file other than the file whose flag has the maximum value among the files having the same file name and the different flags are managed as a recording unit region in which the last recording unit region is invalid.
150 Citations
5 Claims
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1. A method of recording file data on a non-rewritable recording medium and reproducing the file data recorded on the recording medium, the recording medium having a directory region, on which a directory for managing the file data is recorded, and a file data region, on which the file data is recorded, said method comprising the steps of:
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recording file data on the file data region such that the file data is sequentially recorded every recording unit, each recording unit having a predetermined data capacity and being arranged on the file data region; recording a directory for managing the recorded file data on the directory region; detecting, when new file data is to be added into the recorded file data on the file data region to form a series of file data, whether there is a recording unit in which an amount of data recorded thereon during said file data recording step is smaller than the predetermined data capacity; reproducing file data of the recording unit in which the amount of the recorded file data thereof is smaller than the predetermined capacity, detected in said detecting step, and storing the file data of the detected recording unit; recording additional file data by adding the new file data to the the file data stored at said reproducing step such that the additional file data is sequentially recorded on respective different recording units in the file data region; recording an additional directory for managing the additional file data on the directory region; and reproducing the file data and the additional file data both recorded on the file data region without reproducing the recording unit detected in said detecting step, when a series of data files comprising the file data and the additional file data is to be reproduced by use of the directory and the additional directory. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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Original AssigneeCanon Kabushiki Kaisha (Canon Inc.)
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InventorsHosoya, Hideki
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Primary Examiner(s)Young, W. R.
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Assistant Examiner(s)Tran, Thang V.
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Application NumberUS08/193,619Time in Patent Office693 DaysField of Search369/48, 369/59, 369/58, 369/47, 369/124, 369/32, 369/111, 369/49, 360/48, 360/27, 360/49, 360/72.1, 360/72.2, 360/54, 360/39, 235/454, 235/470, 235/494, 395/600US Class Current369/53.21CPC Class CodesG06F 16/1794 Details of file format conv...G06F 16/181 providing write once read m...G06F 16/9017 using directory or table lo...G11B 20/1215 on cards optical aspect of ...G11B 27/327 Table of contents
