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EP0316184A2
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EP
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Apparatus for detecting phase difference and apparatus for recording and reproducing data using the same
Assignee: Panasonic Holdings Corp
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Filing: 1988-11-10
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Granted: —
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Expires: 2008-11-10
Abstract
Abstract In an apparatus for recording and reproducing data, block addresses are extracted from reproduced signals and compared with a reference address, then the phase difference between the reproduced signal and the reference address is detected with a high reliability at the minimum time delay, and then by reflecting the result on the phase of the recording address, the recording signal and reproduced signal are put in phase with each other so that, at the time of after-recording or connected recording, recording tracks be formed having continuous recording phases in the direction of track.
Inventors
- 👤 Tatsuya Adachi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 10:15
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/30; G11B27/3027; G11B27/3063; G11B20/00; G11B20/10; G11B20/10527; G11B27/02; G11B27/031; G11B27/036; G11B2220/00; G11B2220/20; G11B2220/21; G11B2220/215; G11B2220/216; G11B2220/90; G11B2220/91; G11B2220/913; G11B27/032
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
82 words
An apparatus for detecting a phase difference of an input signal divided into blocks, comprising: block address detecting means for detecting a block address from the input signal divided into blocks; reference timing generating means for generating a reference address; and phase difference detecting means for detecting a phase difference between the input signal and the reference address by use of the reference address and the reproduced block address upon detection of an effective block address and generating a phase correction data.
Claim 2
Independent Claim
82 words
An apparatus for detecting a phase difference of an input signal divided into blocks, comprising: block address detecting means for detecting a block address from the input signal divided into blocks; reference timing generating means for generating a reference address; and phase difference detecting means for detecting a phase difference between the input signal and the reference address by use of the reference address and the reproduced block address upon detection of an effective block address and generating a phase correction data.
Claim 3
Dependent Claim
28 words
An apparatus as defined in claim 1, wherein said block address detecting means is provided with means for checking continuity of the block address and producing continuity flags.
Claim 4
Dependent Claim
23 words
An apparatus as defined in claim 2, wherein said block address detecting means is provided with counting means for counting said continuity flags.
Claim 5
Dependent Claim
122 words
A data recording and reproducing apparatus comprising: means for recording data on a recording medium in the form of signals each divided into blocks and for reproducing the recorded signals; block address detecting means for detecting a reproduced block address from a reproduced signal; reference timing generating means for generating a reference address; phase difference detecting means for detecting a phase difference between the reproduced signal and the reference address by use of the reference address and the reproduced block address upon detection of an effective block address and generating a phase correction data; recording timing generating means for generating a recording address according to the phase correction data; and recording means for generating a recording signal according to the recording address.
Claim 6
Dependent Claim
122 words
A data recording and reproducing apparatus comprising: means for recording data on a recording medium in the form of signals each divided into blocks and for reproducing the recorded signals; block address detecting means for detecting a reproduced block address from a reproduced signal; reference timing generating means for generating a reference address; phase difference detecting means for detecting a phase difference between the reproduced signal and the reference address by use of the reference address and the reproduced block address upon detection of an effective block address and generating a phase correction data; recording timing generating means for generating a recording address according to the phase correction data; and recording means for generating a recording signal according to the recording address.
Claim 7
Dependent Claim
18 words
An apparatus as defined in claim 4, wherein said recording means performs after-recording based on said recording address.
Claim 8
Dependent Claim
75 words
A data recording and reproducing apparatus comprising: recording phase detecting means for detecting a recording phase of a first recording track recorded on a recording medium; connected recording phase control means for controlling the recording phase of a second recording track according to the recording phase of the first recording track; and recording means for recording data on the recording medium such that the recording phase is controlled by said connected recording phase control means.
Claim 9
Dependent Claim
75 words
A data recording and reproducing apparatus comprising: recording phase detecting means for detecting a recording phase of a first recording track recorded on a recording medium; connected recording phase control means for controlling the recording phase of a second recording track according to the recording phase of the first recording track; and recording means for recording data on the recording medium such that the recording phase is controlled by said connected recording phase control means.
Claim 10
Dependent Claim
79 words
An apparatus as defined in claim 6, wherein said recording phase detecting means includes: block address detecting means for detecting a reproduced block address from a reproduced signal; reference timing generating means for generating a reference address; and phase difference detecting means for detecting a phase difference between the reproduced signal and the reference address by use of the reference address and the reproduced block address upon detection of an effective block address and generating a phase correction data.
Claim 11
Dependent Claim
56 words
An apparatus as defined in claim 7, wherein said recording phase detecting means is provided with a correction data memory for memorizing said phase correction data, and recording phase data generating means for generating a recording phase data adapted to control the recording phase of the second recording track according to the meomoized phase correction data.
Claim 12
Dependent Claim
34 words
An apparatus as defined in claim 8, wherein said recording phase data generating means is operative to shift the recording phase data from the phase of the first recording track to a specified phase.
References Cited (Backward Citations)
No citation records indexed.
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