EP0504429A1
Expired / Lapsed
EP
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Disk recording and reproducing apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1991-10-03
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Granted: —
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Expires: 2011-10-03
Abstract
Abstract A disk recording and reproducing apparatus which records and reproduces input signals converted into a digital form by using a disk-like recording medium. By combining the recording/reproducing mode in the tracking mode and the track jump operation together, signals are recorded at a constant linear velocity at all times independent of the input data rate. That is, after the recording of the selector is finished, an instruction (108) of a track jump to one track before is given to a tracking control means (6), and an optical head (5) is driven by a tracking control output (106) so as to make a jump onto a track which is on the inside by one track. Thus the operation of the apparatus is changed to the reproduction mode. Therefore, without vacant area in the disk, the data can be continuously recorded in time series. Moreover, simultaneously monitoring to maintain the reliability of the recorded data, or the re-recording function corresponding on the error conditions are easily realized by effecting similar track jump control.
Inventors
- 👤 Hideshi 19-9 Sugiyamate 3-Chome Taki
- 👤 Takafumi 7-5 Kitatomigaoka 6-Chome Ueno
- 👤 Tomoaki 30-4-301 Miiminamimachi Izumi
- 👤 Tetsushi 2-405 Myokenzaka 6-Chome Kasahara
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 23:55
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/10527; G11B19/00; G11B19/02; G11B19/20; G11B19/24; G11B20/00007; G11B20/12; G11B20/1217; G11B20/1251; G11B20/18; G11B20/1833; G11B20/1879; G11B27/00; G11B27/02; G11B27/031; G11B27/034; G11B27/36; G11B7/00; G11B7/004; G11B7/0045; G11B7/08; G11B7/085; G11B7/08505; G11B2220/00; G11B2220/20; G11B2220/25; G11B2220/2537
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
155 words
An optical disk apparatus for recording on a disk-shaped recording medium by the use of an optical head, comprising: recording position detecting means for detecting a recording position on a track on said disk; recording signal processing means for forming blocks for a digitally encoded input signal by performing at least time base compression and recording on said disk in accordance with a predetermined timing generated on the basis of a detection output of said recording position detecting means; and tracking control means for placing said optical head on said track during a recording or reproducing operation and having said optical head jump to a certain track on the basis of a predetermined instruction after the recording operation has been terminated, wherein an on-track state and a track jump are alternately repeated to record a new block subsequent to a recorded block to thereby sequentially form a recording area of the blocks on said track.
Claim 2
Dependent Claim
147 words
An optical disk apparatus for recording on a disk-shaped recording medium by the use of an optical head, comprising: memory means for storing digitally encoded input data; write address generating means for generating a write address of said memory means; read address generating means for generating a read address of said memory means in accordance with a given recording instruction; operation mode instructing means for detecting the difference between said write address and said read address and outputting said recording instruction if the value is above a predetermined comparison value; recording signal processing means for recording a signal possibly read out of said memory means on said disk in conformity with said recording instruction; and tracking control means for placing said optical head on said track during a recording operation and having said optical head jump to a predetermined track on the basis of said recording instruction.
Claim 3
Dependent Claim
219 words
An optical disk apparatus for recording and reproducing on a disk-shaped recording medium by the use of an optical head, comprising: first memory means for performing time base compression for digitally encoded input data; first address generating means for generating a write address and a read address of said first memory means; operation mode instructing means for generating a recording instruction on the basis of positional information recorded on a track and the comparison result by comparing the difference between said write address and said read address of said first memory means with a predetermined comparison value; recording signal processing means for adding at least an error detecting or correcting code to a recorded signal read out of said first memory means on the basis of said recording instruction and recording the same on said disk; tracking control means for having said optical head jump to a predetermined track after the recording has been completed; reproduced signal processing means for performing at least an error detection or correction processing for a reproduced signal reproduced from a predetermined track on said disk by said optical head; second memory means for performing time base expansion for an output data of said reproduced signal processing means; and second address generating means for generating write and read addresses of said second memory means.
Claim 4
Dependent Claim
260 words
An optical disk apparatus for recording and reproducing on a disk-shaped recording medium by the use of an optical head, comprising: memory means for performing time base compression for digitally encoded input data; address generating means for generating a write address and a read address of said memory means; recording signal processing means for adding at least an error detecting or correcting code to a recorded signal read out of said memory means on the basis of a recording instruction and recording the same on said disk by the use of said optical head; tracking control means for having said optical head jump to a predetermined track; reproduced signal processing means for performing, to a reproduced signal reproduced from a predetermined track on said disk by said optical head, at least extraction of positional information on the track and an error detection or correction processing, and outputting the result; and operation mode instructing means for generating said recording instruction by said positional information extracted by said reproduced signal processing means and by comparing the difference between said write address and said read address with a predetermined comparison value, and selecting whether to execute a first recording mode for performing a recording operation on a predetermined track on said disk, a first reproducing mode for reproducing said predetermined recorded track, and a second recording mode for re-recording the same data on said recorded track on the basis of the result of error detection or correction performed for the reproduced signal by said reproduced signal processing means during said first reproducing mode.
References Cited (Backward Citations)
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