EP0472343A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Disc recording and reproducing apparatus
Assignee: Sony Corp
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Filing: 1991-08-13
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Granted: —
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Expires: 2011-08-13
Abstract
Abstract A disc recording apparatus records digital data by an optical head (3) such that time compressed digital data are arranged into a plurality of clusters (C) at an interval of a predetermined number of sectors, a cluster-linking sector having a length longer than an interleaving length is provided at each linking part of each cluster (C), and the digital data are subsequently interleaved and recorded on a disc-shaped recording medium (2) so that interleaving at the time of data recording on a cluster-by-cluster basis is within the range of the cluster-linking sector. There is also disclosed a disc reproducing apparatus for reproducing digital data so recorded.
Inventors
- 👤 Yasuaki Patents Div. Sony Corp. Maeda
- 👤 Hideki Patents Div. Sony Corp. Nagashima
- 👤 Hirotoshi Patents Div. Sony Corp. Fujisawa
- 👤 Ryo Patents Div. Sony Corp. Ando
- 👤 Tadao Patents Div. Sony Corp. Yoshida
- 👤 Hiroshi Patents Div. Sony Corp. Mukawa
- 👤 Hideo Patents Div. Sony Corp. Obata
- 👤 Kazuhiko Patents Div. Sony Corp. Fujiie
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 22:54
CPC Classifications
G; G11; G11B; G11B7/00; G11B20/00; G11B20/00007; G11B20/10; G11B20/10527; G11B27/00; G11B27/005; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/34; G11B7/007; G11B7/013; G11B20/12; G11B2020/1264; G11B2020/1265; G11B2020/1277; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2525; G11B2220/2537; G11B2220/2545; G11B2220/255; G11B27/3063
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
106 words
A disc recording apparatus for recording time compressed digital data on a disc-shaped recording medium (2), the apparatus comprising: storage means (14) for temporarily storing said digital data; and means (15) for arranging said digital data read out from said storage means (14) into a plurality of clusters (C) at an interval of a predetermined number of sectors, annexing cluster-linking sectors at linking portions of each of said clusters (C), each of said cluster-linking sectors being longer than an interleaving length for said digital data, subsequently processing the digital data within each of said clusters (C) by interleaving, and recording interleaved data on said medium (2).
Claim 2
Dependent Claim
116 words
Apparatus according to claim 1 further comprising control means (7) for controlling read-out of said storage means (14) so that, when the amount of said digital data stored in said storage means (14) exceeds a first predetermined amount of data, said first amount of digital data is continuously read from said storage means (14), so as continuously to maintain a writing space in excess of a second predetermined amount of data in said storage means (14); said control means (7) also controlling a recording means (16) so that said first predetermined amount of data of record data read out intermittently from said storage means (14) is continuously recorded on a recording track on said medium (2).
Claim 3
Dependent Claim
79 words
Apparatus according to claim 2 wherein said control means (7) performs a control operation so that, when said recording means (16) becomes unable to record data, read-out of the record data from said storage means (14) is discontinued and said recording means (16) is reset to its recording state, said control means (7) causing the unrecordable record data to be read out again from said storage means (14) for recording continuously with the record data preceding said unrecordable data.
Claim 4
Dependent Claim
35 words
Apparatus according to claim 3 wherein said second predetermined amount of data exceeds an amount of data inputted to said memory means (14) during the reset time from the non-recording state to a recording state.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 3 wherein said second predetermined amount of data corresponds to an amount of data for one cluster (C).
Claim 6
Dependent Claim
23 words
Apparatus according to claim 1 wherein said cluster linking sector is formed by dummy data not affecting digital data in said cluster (C).
Claim 7
Dependent Claim
25 words
Apparatus according to any one of the preceding claims wherein one sector corresponds to one block or 98 8-to-14 modulated frames of a compact disc.
Claim 8
Dependent Claim
248 words
A disc reproducing apparatus for reproducing record data continuously recorded on a disc-shaped recording medium (2), the apparatus comprising: reproducing means (3) for reproducing record data which record data are time compressed digital data previously arranged into a plurality of clusters (C) at an interval of a predetermined number of sectors, to which have been added cluster-linking sectors so that a cluster-linking portion is of a length longer than an interleaving length for said digital data, and which have been recorded on said medium (2) after interleaving said digital data in said cluster (C); storage means (22) for deinterleaving playback data from the apparatus and storing digital data from which said cluster linking sectors have been removed; time expanding means (23) supplied with said digital data intermittently read out from said storage means (22) and outputting said digital data as time-expanded output signals; and control means (7) for effecting writing control of said storage means (22) so that, when an amount of said digital data stored in said storage means (22) becomes lower than a predetermined amount of data, said record data are started to be reproduced to write the reproduced data in said storage means (22) so that said predetermined amount of digital data is continuously stored in said storage means (22), said control means (7) also controlling a reproducing position on said medium (2) so that reproduced data intermittently written in said memory means (22) is continuously reproduced from the recording track on said medium (2).
Claim 9
Dependent Claim
75 words
Apparatus according to claim 8 wherein said control means (7) detects that said reproducing means (3) is in a non-reproducing state to terminate writing of digital data in said memory means (22), to reset said reproducing means (3) to a reproducing state, said control means (7) then operating to reproduce unreproduced playback data from said medium (2) again to write said reproduced unreproduced playback data is said memory means (22) continuous with prior playback data.
Claim 10
Dependent Claim
43 words
Apparatus according to claim 9 wherein said predetermined amount of data stored in said storage means (22) is in excess of an amount of digital data read out from said storage means (22) during resetting from said non-recording state to said recording state.
References Cited (Backward Citations)
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