Dynamic information storage or retrieval – Editing of stored information
Patent
1997-06-09
1998-10-20
Edun, Muhammad N.
Dynamic information storage or retrieval
Editing of stored information
369 60, 369 58, G11B 700
Patent
active
058257390
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
This invention relates to a recording and/or reproducing apparatus and a recording and/or reproducing method for recording data and management data therefor on a recording medium, such as an optical disc, or reproducing data and management data therefor recorded on the recording medium.
BACKGROUND ART
Up to now, a disc-shaped recording medium, such as an optical disc, for recording and/or reproducing various data, such as music data, has been in use as a recording medium capable of optically recording and/or reproducing data.
As this type of the optical disc, a so-called compact disc, having a diameter of 12 cm or 8 cm, is in use. This compact disc has a data recording area for recording data, such as music data or speech data, and a management data recording area for recording management data used for management of the data recorded in the data area. The management data recording area is provided on the rim of a center aperture of the optical disc towards the inner rim of the data recording area thereof. In the management data recording area are recorded a recording start address, a recording end address or the absolute time information for the music data or speech data recorded in the data recording area. The management data, such as recording start address, a recording end address or the absolute time information, is termed the table-of-contents data, or TOC data.
If, in a disc recording/reproducing apparatus, recording and/or reproducing data using such optical disc, data is recorded or reproduced on or from the optical disc, the TOC data is first read out from the management data recording area so as to be temporarily stored in a memory provided in the apparatus.
For reproducing data recorded on this optical disc, a head device (so-called optical disc) is moved on the basis of the data recording start address for desired data n the read-out TOC data for starting data read-out and reproducing operations.
For recording new data on the optical disc, the leading position of an unrecorded area in the data area of the optical disc is detected from the TOC data so that new data is recorded as from the leading position of the unrecorded area in the data area. The TOC data concerning the recording start address and the recording end address for the data newly recorded by the present recording operation are then added to the TOC data stored in the memory data for updating the TOC data on the memory. The updated TOC data are read out from the memory for recording on the management data recording area on the optical disc. Thus the TOC data previously recorded in the management data recording area of the optical disc is replaced by the updated TOC data.
With the present disc recording/reproducing apparatus, it is possible to edit previously recorded data. With the present editing operation, it is possible to erase data, divide one data into plural data, connect two or more data into one data, move data, append title to the data, or to modify a title.
This editing operation can be easily realized solely by changing the TOC data without changing actually recorded data. For erasing data on an optical disc, for example, it suffices to erase the TOC data concerning the data desired to be erased. For dividing one data into plural data, it suffices to divide the TOC data for the data desired to be divided into plural TOC data. At which portion of a data the data is to be divided is desegrated by the user. For connecting two or more data, it suffices to change the TOC data of the data desired to be connected, with the recording start address of the leading data as the recording start address of the connected data and with the recording end address of the terminal data as the recording end address of the connected data. Which data should be connected to which data is designated by the user. For moving data, for example, the first data, it suffices to rewrite a portion specifying which number data in the TOC data is the first data so that the first data will become the fifth data. For appending a title t
REFERENCES:
patent: 5289450 (1994-02-01), Mizumoto et al.
patent: 5381292 (1995-01-01), Hira
patent: 5515351 (1996-05-01), Nonaka et al.
Kaneko Takayuki
Saito Yuji
Edun Muhammad N.
Sony Corporation
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