摘要:
In an optical disc 7 and an optical disc recording apparatus wherein a desirable information signal is recorded in a recording area of the optical disc 7 in which data such as musical number, starting time, ending time and so on based on the information signal recorded in the recording area of the lead-in area AR.sub.RI, in addition to the recording area of the optical disc 7, extended recording areas AR.sub.EXI and AR.sub.EXO are provided at inner and/or outer peripheral sides outside of the recording area and desirable recording informations are recorded in the extended recording areas AR.sub.EXO and AR.sub.EXO .
摘要:
The optical disc according to the present invention includes an unrewritable region in which the number of times of possible recording or the cumulative possible recording time duration is recorded in advance. The apparatus for recording signals on this optical disc according to the present invention reproduce the number of times of possible recording or the cumulative possible recording time duration recorded in the unrewritable region of the optical disc and inhibits the recording operation when the number of times of recording or the cumulative recording time duration exceeds the aforementioned number of times of possible recording or the cumulative possible recording time duration.
摘要:
An optical information recording medium having at least a transparent substrate and a recording layer and capable of recording an information by irradiating the recording layer with laser beams from the transparent substrate side, wherein a protective film having hygroscopic property is formed on a light incident surface of the transparent substrate so that it can be stripped therefrom.
摘要:
An optical recording medium having plural recording layers includes a first recording layer on which first data is to be recorded and a second recording layer on which second data is to be recorded. The first and second recording layers are layered, with the second data being recorded at a location in the second recording layer in the vicinity of a location in the first recording layer where the first data relevant to the second data is recorded. Replay signals of variable configurations can be obtained by suitably synthesizing data read out from the respective recording layers.
摘要:
An optical disc having address information recorded in a wobbling manner is arranged to record or reproduce data at correct positions. A track is previously formed as a pregroove and is wobbled in accordance with address information. The track is divided into a plurality of sectors. A plurality of sync marks S are formed in each sector, and at least one of the sync marks in one round of the track is formed as a reference mark R different from the other sync marks S. To reduce overhead and to achieve high-density random recording and reproduction, a method may also be used in which one cluster of data is formed of a data area and a link area located between data areas and consisting of two frames, in which each of the data area and the link area has a structure formed of unit frames separated by a sync signal (frame sync), and in which data is recorded or reproduced as unit clusters.
摘要:
The present invention is concerned with a method for modulating and recording data, in which the data are modulated in such a manner that m-bit data are converted into n-bit data, where m and n are real integers and m
摘要:
An optical recording medium having plural recording layers includes a first recording layer on which first data is to be recorded and a second recording layer on which second data is to be recorded, the first and second data being relevant to one another. The first and second recording layers are layered together, with the second data being recorded at a location in the second recording layer in the vicinity of a location in the first recording layer where the first data relevant to the second data is recorded. Replay signals of variable configurations can be obtained by suitably synthesizing data read out from the respective recording layers.
摘要:
A recording medium at least having a first recording layer for recording first information and a second recording layer for recording second information. A discriminating signal indicating the playback mode is recorded on at least one of the first and second recording layers provided on the recording medium. The discriminating signal indicates a first playback mode for respectively reproducing the first information recorded in the first recording layer and the second information recorded on the second recording layer, or a second playback mode for calculating the first information recorded in the first recording layer and the second information recorded in the second recording layer to generate playback signals. A reproducing method and apparatus for the recording medium are also provided for reproducing the recording medium.
摘要:
An optical disc having address information recorded in a wobbling manner is arranged to record or reproduce data at correct positions. The optical disc includes at least one track on which data is recorded and which is previously formed as a pregroove wobbled in accordance with an address information, where the track has a plurality of frames wobbled in accordance with the address information, and further where a plurality of sync marks is formed in each of said frames by wobbling said pregroove at a center frequency of frequencies of wobbling with the address information.
摘要:
There is disclosed a method for optically recording data in data areas of a disk-like recording medium in which servo signal areas are formed along the track in alternation with data areas. Parity codes for error correction are generated and affixed in at least one direction, that is, in the column or row direction, of a two-dimensionally arrayed data block, and the two-dimensionally arrayed data affixed with the parity codes are supplied sequentially to an optical pickup along any one of the column and row directions so as to be recorded in respective ones of said data areas. The number of the data in the direction of reading of the two-dimensionally arrayed data is selected to be an integer times the data number that can be recorded in each data area provided on said disk-like recording medium, when the former is intended to be greater than or equal to the latter, or the data number that can be recorded in each such data area is selected to be an integer times the number of the data in the direction of reading of the two-dimensionally arrayed data when the inverse relation is intended.