Information recorder, recording method, and recording media

Details Information recorder, recording method, and recording media Information recorder, recording method, and recording media

1999-10-04

2004-11-09

Chevalier, Robert (Department: 2615)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000

Reexamination Certificate

active

06816666

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a data recording system, a data recording method, and a recording medium.
BACKGROUND ART
In a conventional video system, recorded audio-visual (AV) data are edited through the following processes. The video system employs a reproduction system for reproducing the recorded AV data and a recording system for recording the AV data reproduced by the reproduction system. Desired portions of the AV data are recorded on the recording system while the AV data are reproduced by the reproduction system. For example, when an attempt is made to create a digest of certain AV data, the AV data are edited through the processes mentioned above. For example, as shown in
FIG. 21
, when an attempt is made to create a new video file from a portion of a first video file including first video data and a portion of a second video file including second video data, there is a necessity for producing a duplicate of the corresponding portion of the first video file and a duplicate of the corresponding portion of the second video file.
According to the standards for an existing mini disk (MD), audio data are not recorded on a track in adjacent locations but are discretely recorded on the track in recording units, each comprising a predetermined amount of data. In order to reproduce a string of data from the discrete data sets, there is provided a management table for use in linking the discrete data sets together. The reproduction system accesses the discrete data in the sequence written in the management table, to thereby enable reproduction of sequential sound.
In the above-described conventional video system, editing of recorded AV data involves use of two VCRs. Further, since AV data must be duplicated while editing, an additional recording area for recording the duplicate of the AV data is required.
According to the existing MD standards, each of the linked data sets assumes a predetermined amount of recorded data, and only a single management table is assigned to a mini disk. If other data are overwritten on a disk on which data have already been recorded, the existing management table must be rewritten. Thus, only single link data are available. For these reasons, in order to edit data, the data must be duplicated as in the conventional video system. A significant problem is not encountered in a case where there is little necessity for editing data, such as the case of an MD. In contrast, in the case of AV data, it is expected that there is an increasing user demand for creating a digest of certain AV data.
Further, the conventional file system can share a file but cannot share a portion of a file.
The present invention is directed to an system and method for enabling easy editing of AV data. Particularly, the object of the present invention is to provide a data recording system, a data recording method, and a recording medium, wherein AV data can be readily edited without involvement of duplication of the AV data and without a necessity for an addition data recording area.
SUMMARY OF THE INVENTION
The present invention has been conceived to solve the foregoing problem. According to a first aspect of the present invention, there is provided a data recording system for recording primary data, comprising:
a recording section for recording primary data; and
a control section which generates an original file at the time of recording of the primary data, and a virtual file through editing of the original file, wherein the original file stores link data which are formed by arranging in sequence address data for reproduction purposes stored in a recording region on a recording medium, and the virtual file stores link data which are formed by arranging in sequence address data for reproduction purposes stored in the recording region on the recording medium.
In this data recording system, when the recording section records primary data, the control section generates an original file. Further, through editing of the original file, a virtual file is prepared. Through use of the virtual file having the edited link data stored thereon, a plurality of files can access at least a portion of the primary data. As a result, for example, editing of the primary data, such as preparation of a digest of the primary data, becomes feasible, thereby eliminating a necessity for use of two VCRs. Further, the primary data are managed in the form of only files, thus eliminating a necessity for ensuring a region for use in recording a duplicate of the primary data.
According to a second aspect of the present invention, the control section prepares a virtual file by editing the original file and/or the virtual file. A virtual file can be formed not only from the original file but also from another virtual file.
According to a third aspect of the present invention, there is provided a data recording system for storing primary data, comprising:
a recording section for recording primary data; and
a control section for preparing a file at the time of recording of the primary data, wherein the file stores, in the form of a logical address, link data which are formed by arranging in sequence address data for reproduction purposes stored in a recording region on a recording medium.
In this data recording system, the file is prepared when the recording section records the primary data. As a result of a new file being prepared by editing the file, editing or reproduction of the primary data; for example, preparation of a digest of the primary data, becomes feasible, thereby eliminating a necessity for use of two VCRs. Further, there is eliminated a necessity for ensuring a region for use in recording a duplicate of the primary data.
According to a fourth aspect of the present invention, the control section edits the original file that is prepared at the time of recording of the primary data, thereby resulting in preparation of a new file; that is, a virtual file. Further, a new virtual file is prepared by editing an existing original file and/or an existing virtual file. Reserving of the thus-prepared virtual file enables editing of the primary data; for example, preparation of a digest of the primary data.
According to a fifth aspect of the present invention, the virtual file comprises at least a portion of address data pertaining to a file which is used as a source for editing.
According to a sixth aspect of the present invention, the control section prepares a new file on the basis of a plurality of files. A new single file can be prepared through editing of a plurality of files.
According to a seventh aspect of the present invention, the address data correspond to address data stored in respective unit recording regions which are formed by dividing the recording medium into a plurality of recording regions.
According to an eighth aspect of the present invention, when any of existing files is deleted, the control section deletes the file. When a portion of any one of existing files is deleted, the control section deletes from the file one or a plurality of address data sets pertaining to the file. In this way, any one of existing files or a portion of thereof can be deleted by deletion of only one or a plurality of address data sets pertaining to the file.
According to a ninth aspect of the present invention, the control section prepares a link count table for managing the number of times files refers to each of unit recording regions into which the recording region on the recording medium is divided. Further, the control section updates data pertaining to the prepared link count table or pertaining to a link count table read from the recording medium, through editing and/or deletion of the files. Reserving the link count table enables management of the respective unit recording regions. For example, the unit recording region assigned reference number
0
can be released as a recordable region.
According to a tenth aspect of the present invention, the unit recording region assigned reference number
0
in the link count table is handled as a recordable region. When the origina

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