Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Reexamination Certificate
2000-04-27
2001-02-20
Edun, Muhammad (Department: 2753)
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
C369S047360, C369S053130, C369S275300
Reexamination Certificate
active
06192018
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a recording/reproducing device and method and discs applied therein, and more particularly to a recording/reproducing device and method and discs applied therein for recording data on a rewritable disc in higher density or reproducing data therefrom.
2. Description of the Prior Art
As the method for addressing an optical disc (RAM disc) from and onto which data can be reproduced and rewritten, it is well known in CDR (Compact Disc Recordable), for example, that guide grooves (groove tracks) for recording or reproducing data are wobbled according to address information. The method of recording addresses by wobbling has the merit of improving redundancy, compared with the method of recording addresses in advance as pre-pits by embossing or the like. Without the need to produce pre-pits by embossing, this method also has the advantage of providing compatibility with reproduction only ROM discs recorded in the form of CLV.
In a rewritable disc on which data is not always recorded continuously, a link area must be formed between a cluster and a cluster, wherein the link area must not only include a PLL area where clocks for data recording/reproducing are recorded and a slice control area where data for controlling a slice level for transforming a reproduction RF signal into a binary value is recorded, but also contain frame synchronizing signals for providing frame synchronization.
However, since no substantial data is recorded in each frame of the link area, there has been the problem that the capacity of conventional rewritable discs cannot be increased, compared with ROM discs.
SUMMARY OF THE INVENTION
This invention has been made in consideration of the above situation and its object is to permit the recording of data in higher density.
A rewritable disc in which data is recorded along tracks, the disc comprising: a plurality of data blocks of second size, a plurality of collected sector data of first size being formed on said tracks; and link area of said first size, formed between respective data blocks and subsequent data blocks.
A disc according to claim
1
, wherein the second size is a unit for recording or reproducing data.
A disc according to claim
1
, wherein the data blocks have first and second error correction blocks comprised of first and second error correction code types.
A disc according to claim
1
, wherein the link area includes a start point for use as a recording start position and position shift data recorded from the start point and having a specified data amount selected as a random value.
A disc according to claim
1
, wherein the track is comprised of wobbling groove modulated corresponding to address information including a track number and a segment number designating a circumferential direction.
A disc according to claim
1
, wherein each of the sector data comprises a plurality of frame data having frame synchronization signals which are selected from among frame synchronization signals of plural types and are disposed in specified order, and said link area includes frame data disposed in such order that the frame synchronization signals are equal to the sector data.
A rewritable disc in which data is recorded along tracks, wherein the disc has the same frame structure as a reproduce only disc in which sector data comprised of a plurality of frame data having respective specified frame synchronization signals, and a link area is formed between the sector data and subsequent sector data and includes frame data disposed in such order that the frame synchronization signals are equal to said sector data.
A device for recording data in a rewritable disc, the device comprising: a head for recording data on tracks formed in the disc and reproducing the data recorded on the tracks; and a recording circuit for outputting input data to said head in units of data blocks having a first size and adding link areas having a second size before and after the data blocks for output.
A device according to claim
8
, wherein the data block consists of a plurality of sectors having the second size, further comprising an address generation circuit for generating sector addresses to be added to these sectors.
A device according to claim
8
, wherein the link areas comprise a front link area added after the preceding data block and a rear link area added to the following data block.
A device according to claim
8
, wherein said recording circuit adds first and second error correction codes comprised of first and second error correction code types to the data blocks.
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Kobayashi Shoei
Masuda Shozo
Chang Dexter T.
Edun Muhammad
Frommer William S.
Frommer Lawrence & Haug LLP.
Sony Corporation
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