Data management device in a karaoke communications system
First Claim
1. A data management device for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising:
- a receiving means for receiving first data file transmitted from the data distributor via the data communication path;
a rewritable memory for storing the first data file received by said receiving means;
a reading means for accommodating the storage medium on which second data files are recorded and for reading out the second data files from the storage medium distributed by the data distributor;
a file number comparing means for comparing a file number of the first data file with a file number of the second data file when new first data file is transmitted or when a new storage medium is set to the reading means, said file number identifying contents of the data file; and
a file managing means for invalidating or erasing the first data file corresponding to the file number if the file number of the first data file is coincident with the file number of the second data file.
1 Assignment
0 Petitions
Accused Products
Abstract
A data management device in a karaoke system which receives a first data file by a receiving unit and is stored in a rewritable memory such as a hard disk. A second data file, recorded on a recording medium such as a CD-ROM, is read out by a reading unit. A file number comparing unit then compares the file numbers of the first and second data file and a file managing unit erases the first data file if the file numbers coincide with each other. In addition, a version comparing unit compares versions of both the first and second data file. If the first data file version is older than the second data file version, then the file managing unit erases the first data file version, so as to ensure that the new version is always used. Furthermore, a detecting unit detects whether data files corresponding to targeted items are recorded in both, the rewritable memory and the recording medium. In the event that data files are recorded in both, the file managing unit erases the data file in the rewritable memory.
18 Citations
14 Claims
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1. A data management device for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising:
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a receiving means for receiving first data file transmitted from the data distributor via the data communication path; a rewritable memory for storing the first data file received by said receiving means; a reading means for accommodating the storage medium on which second data files are recorded and for reading out the second data files from the storage medium distributed by the data distributor; a file number comparing means for comparing a file number of the first data file with a file number of the second data file when new first data file is transmitted or when a new storage medium is set to the reading means, said file number identifying contents of the data file; and a file managing means for invalidating or erasing the first data file corresponding to the file number if the file number of the first data file is coincident with the file number of the second data file.
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2. A data management device for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising:
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a receiving means for receiving first data file transmitted from the data distributor by the data communication path; a rewritable memory for storing the first data file received by said receiving means; a reading means for accommodating a storage medium on which second data files are recorded and for reading out the second data files from the storage medium distributed by the data distributor; a file number comparing means for comparing a file number of the first data file with a file number of the second data file when new first data file is transmitted or when a new storage medium is set to the reading means, said file number identifying contents of the data file; a version comparing means for comparing a version of the first data file with a version of the second data file if said file number comparing means detects that the file numbers of the first and the second data files are identical to each other; and a file managing means for invaliding or erasing the first data file if the version of the first data file is older than that of the second data file. - View Dependent Claims (3, 4)
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5. A data management device for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising:
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a receiving means for receiving data file corresponding to a plurality of items transmitted from a data distributor by the data communication path; a rewritable memory for storing the data file received by said receiving means; a reading means for accommodating a storage medium on which the data files are recorded and for reading out the data files from the storage medium distributed by the data distributor; a detecting means for detecting the data files, corresponding to the same item, recorded on both of the rewritable memory and the storage medium when new first data file is transmitted or when a new storage medium is set to the reading means; and a file managing means for invalidating or erasing the data files in the rewritable memory when said detecting means detects the data files corresponding to the same item in both of the rewritable memory and the storage medium. - View Dependent Claims (6, 7)
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8. A data management method for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising the steps of:
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receiving first data file transmitted from the data distributor via the data communication path; storing the received first data file into a rewritable memory; reading out the second data files from the storage medium distributed by the data distributor by a reading unit which accommodates the storage medium on which second data files are recorded; comparing a file number of the first data file with a file number of the second data file when new first data file is transmitted or when a new storage medium is set to the reading unit, said file number identifying contents of the data file; and invalidating or erasing the first data file corresponding to the file number if the file number of the first data file is coincident with the file number of the second data file.
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9. A data management method for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising the steps of:
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receiving first data file transmitted from the data distributor by the data communication path; storing the received first data file into a rewritable memory; reading out the second data files from the storage medium distributed by the data distributor by a reading unit which accommodates the storage medium on which second data files are recorded; comparing a file number of the first data file with a file number of the second data file when new first data file is transmitted or when a new storage medium is set to the reading unit, said file number identifying contents of the data file; comparing a version of the first data file with a version of the second data file if it is detected that the file numbers of the first and the second data files are identical to each other; and invalidating or erasing the first data file if the version of the first data file is older than that of the second data file. - View Dependent Claims (10, 11)
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12. A data management method for managing data supplied from a data distributor via both a data communication path and a storage medium, comprising the steps of:
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receiving data file corresponding to a plurality of items transmitted from a data distributor by the data communication path; storing the received data file into a rewritable memory; reading out the second data files from the storage medium distributed by the data distributor by a reading unit which accommodates the storage medium on which second data files are recorded; detecting the data files, corresponding to the same item, recorded on both of the rewritable memory and the storage medium when new first data file is transmitted or when a new storage medium is set to the reading unit; and invalidating or erasing the data files in the rewritable memory when the data files corresponding to the same item are detected in both of the rewritable memory and the storage medium. - View Dependent Claims (13, 14)
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Specification