Data recording device, data reproducing device and data recording medium for managing encoded data over a plurality of recording media
First Claim
1. A data reproducing device for reproducing from a recording medium data coded by a predetermined coding process, comprising:
- reproducing means for reproducing coded data from a plurality of information recording surfaces on at least one recording medium;
decoding means for decoding the coded data and for outputting decoded data; and
control means for controlling said reproducing means to reproduce said coded data from a first surface of said plurality of information recording surfaces in accordance with second management data recorded on said first surface, and for controlling said reproducing means to switch to a second surface of said plurality of information recording surfaces in accordance with first management data recorded on said first surface, wherein said control means is further configured to control said reproducing means to reproduce said coded data from said second surface in accordance with another second management data recorded on said second surface;
wherein said first management data is not recorded on said second surface and used for managing all of said plurality of surfaces, and said second management data is used for managing a corresponding one of said plurality of surfaces.
1 Assignment
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Accused Products
Abstract
A data recording device that can easily and reliably manage a plurality of recording media or information recording surfaces even when a data compression rate largely varies with the contents of the data and that can record, for example, mass image data by effectively preventing the picture quality of an image represented by the image data from being degraded. The data recording device records image data after securing a region according to the preliminarily estimated number of recording media or information recording surfaces at the time of recording image data by using a coding method, by which a data compression rate largely varies with the contents of data. Thereafter, the data recording device records management data used for managing the plurality of recording media or information recording surfaces, on which the coded data is recorded, on the management region according to a result of recording.
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Citations
13 Claims
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1. A data reproducing device for reproducing from a recording medium data coded by a predetermined coding process, comprising:
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reproducing means for reproducing coded data from a plurality of information recording surfaces on at least one recording medium;
decoding means for decoding the coded data and for outputting decoded data; and
control means for controlling said reproducing means to reproduce said coded data from a first surface of said plurality of information recording surfaces in accordance with second management data recorded on said first surface, and for controlling said reproducing means to switch to a second surface of said plurality of information recording surfaces in accordance with first management data recorded on said first surface, wherein said control means is further configured to control said reproducing means to reproduce said coded data from said second surface in accordance with another second management data recorded on said second surface;
wherein said first management data is not recorded on said second surface and used for managing all of said plurality of surfaces, and said second management data is used for managing a corresponding one of said plurality of surfaces. - View Dependent Claims (2, 3)
a plurality of CD-ROM drives.
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4. A data reproducing device for reproducing from a recording medium data coded by a predetermined coding process, comprising:
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at least one drive device configured to reproduce coded data from a plurality of information recording surfaces on at least one recording medium;
a decoding circuit configured to decode the coded data and configured to output decoded data; and
a control circuit configured to control said at least one drive device to reproduce said coded data from a first surface of said plurality of information recording surfaces in accordance with second management data recorded on said first surface, and to control said at least one drive device to switch to a second surface of said plurality of information recording surfaces in accordance with first management data recorded on said first surface, wherein said control circuit is further configured to control said at least one drive device to reproduce said coded data from said second surface in accordance with another second management data recorded on said second surface;
wherein said first management data is used for managing all of said plurality of surfaces, and said second management data is used for managing a corresponding one of said plurality of surfaces.
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5. A method of reproducing from a recording medium data coded by a predetermined coding process, comprising the steps of:
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reading first management data from a first surface of a plurality of information recording surfaces of at least one recording medium;
reading second management data from said first surface;
reproducing coded data from said first surface in accordance with said second management data;
decoding said coded data and in accordance therewith generating output data;
changing to a second surface of said plurality of surfaces in accordance with said first management data;
reading another second management data from said second surface;
reproducing more coded data from said second surface according to said another second management data; and
decoding said more coded data and in accordance therewith generating more output data; and
wherein said first management data is not recorded on said second surface and used for managing all of said plurality of surfaces, and said second management data is used for managing a corresponding one of said plurality of surfaces.
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6. A recording medium, in which coded data obtained by encoding data according to a predetermined coding method is recorded, operative to control, in part, operation of a reproduction device, said recording medium comprising a plurality of information recording surfaces on at least one recording medium, said recording medium having recorded thereon:
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first management data used for managing all of said plurality of information recording surfaces recorded only on a first of said plurality of information recording surfaces, said first management data having been generated upon completion of recording said coded data;
a plurality of second management data, each of said plurality of second management data recorded on a corresponding one of said plurality of information recording surfaces and used for managing said corresponding one of said plurality of information recording surfaces;
an overlapping portion of said coded data on one surface of said plurality of information recording surfaces; and
a duplicate of said overlapping portion on another surface of said plurality of information recording surfaces, wherein the reproduction device reproduces the coded data from the first surface of the plurality of information recording surfaces based on the second management data recorded on the first surface and switches to a second surface of the plurality of information recording surfaces based on the first management data recorded on the first surface. - View Dependent Claims (7, 8, 9)
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10. A plurality of recording media, on which coded data obtained by encoding data according to a predetermined coding method is recorded, operative to control, in part, operation of a reproduction device, said plurality of recording media having recorded thereon:
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first management data used for managing all of said plurality of recording media recorded on a first medium of said plurality of recording media, said first management data having been generated upon completion of recording said coded data;
a plurality of second management data, each of said plurality of second management data recorded on a corresponding one of said plurality of recording media and used for managing said corresponding one of said plurality of recording media;
an overlapping portion of said coded data on one medium of said plurality of recording media; and
a duplicate of said overlapping portion on another medium of said plurality of recording media, wherein the reproduction device reproduces the coded data from the first medium of the plurality of recording media based on the second management data recorded on the first medium and switches to a second medium of the plurality of recording media based on the first management data recorded on the first medium. - View Dependent Claims (11, 12, 13)
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Specification