US4697212A
Expired / Lapsed
US
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Method and apparatus for recording a digital information signal
Assignee: Sony Corp
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Filing: 1984-06-15
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Granted: 1987-09-29
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Expires: 2004-06-15
Abstract
Abstract A method of recording a digital data signal, such as an audio PCM signal, onto a recording medium in the longitudinal direction thereof, together with an apparatus which is suitable for this recording method. Even-numbered words and odd-numbered words in a digital data signal are recorded on a first track group and a second track group, respectively, which are separated from each other in the widthwise direction of a recording medium, to prevent a series of words becoming error words because of, for example, a flaw in the recording medium in the longitudinal direction thereof. The data format is changed at the input and output of a recording encoder to enable an error correction code and a recording circuit to be used in common for digital tape recorders which have different numbers of tracks, e.g., n tracks and 2n tracks. When an error correction code is recorded in such a manner that one word in the digital data signal is divided into a plurality of symbols which are formed into an error correction code, a plurality of symbols of the same word are recorded at a position at which error correlation is strong, making effective use of the error correction capacity of the error correction code.
Inventors
- 👤 Eiichi Osawa
- 👤 Masato Tanaka
- 👤 Mamoru Yoshizawa
- 👤 Jun Nakai
- 👤 Yuichi Kojima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:24
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/18; G11B20/1866; G11B20/12; G11B20/1201; G11B20/1202; G11B20/1204; G11B20/1806; G11B20/1809; G11B5/00; G11B5/008; G11B5/00813; G11B5/00817; G11B5/00821; G11B5/00826; G11B5/0083; G11B5/00878; G11B5/00891; G11B20/10527; G11B2020/10537; G11B2020/10546; G11B2020/1087; G11B2020/10879; G11B2220/00; G11B2220/90
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A method of recording a digital information signal in which a digital information signal is recorded on a plurality of parallel tracks which are formed in the longitudinal direction of a recording medium, comprising the steps of: separating a time series of said digital information signal into a plurality of even-numbered words and a plurality of odd-numbered words; specifying in a manner such that said plurality of even-numbered and said plurality of odd-numbered words are respectively recorded on a first track group and a second track group which are separated with respect to the widthwise direction of said recording medium; and performing an error correction coding process with regard to each of said plurality of even-numbered words and said plurality of odd-numbered words.
Claim 2
Independent Claim
123 words
A method of recording a digital information signal in which a digital information signal is recorded on a plurality of parallel tracks which are formed in the longitudinal direction of a recording medium, comprising the steps of: separating a time series of said digital information signal into a plurality of even-numbered words and a plurality of odd-numbered words; specifying in a manner such that said plurality of even-numbered and said plurality of odd-numbered words are respectively recorded on a first track group and a second track group which are separated with respect to the widthwise direction of said recording medium; and performing an error correction coding process with regard to each of said plurality of even-numbered words and said plurality of odd-numbered words.
Claim 3
Independent Claim
127 words
An apparatus for recording a digital information signal in which a digital information signal is recorded on a plurality of parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: means for separating a time series of said digital information signal into a plurality of even-numbered words and a plurality of odd-numbered words; means for specifying in a manner such that said plurality of even-numbered words and said plurality of odd-numbered words are respectively recorded on a first track group and a second track group which are separated with respect to the widthwise direction of said recording medium; and means for performing an error correction coding process with regard to each of said plurality of even-numbered words and said plurality of odd-numbered words.
Claim 4
Independent Claim
127 words
An apparatus for recording a digital information signal in which a digital information signal is recorded on a plurality of parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: means for separating a time series of said digital information signal into a plurality of even-numbered words and a plurality of odd-numbered words; means for specifying in a manner such that said plurality of even-numbered words and said plurality of odd-numbered words are respectively recorded on a first track group and a second track group which are separated with respect to the widthwise direction of said recording medium; and means for performing an error correction coding process with regard to each of said plurality of even-numbered words and said plurality of odd-numbered words.
Claim 5
Independent Claim
83 words
A method of recording a digital information signal in which a digital information signal is recorded on n parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: an encoding step of performing error correction coding processes with respect to an input digital information signal and forming data to be distributed onto 2n tracks; and a time-shared multiplexing step of receiving outputs in said encoding step and converting said outputs to data to be recorded on said n tracks.
Claim 6
Independent Claim
83 words
A method of recording a digital information signal in which a digital information signal is recorded on n parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: an encoding step of performing error correction coding processes with respect to an input digital information signal and forming data to be distributed onto 2n tracks; and a time-shared multiplexing step of receiving outputs in said encoding step and converting said outputs to data to be recorded on said n tracks.
Claim 7
Independent Claim
81 words
An apparatus for recording a digital information signal in which a digital information signal is recorded on n parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: encoding means for performing error correction coding processes with respect to an input digital information signal and forming data to be distributed onto 2n tracks; and time-shared multiplexing means for receiving outputs of said encoding means and converting said outputs to data to be recorded on said n tracks.
Claim 8
Independent Claim
81 words
An apparatus for recording a digital information signal in which a digital information signal is recorded on n parallel tracks which are formed in the longitudinal direction of a recording medium, comprising: encoding means for performing error correction coding processes with respect to an input digital information signal and forming data to be distributed onto 2n tracks; and time-shared multiplexing means for receiving outputs of said encoding means and converting said outputs to data to be recorded on said n tracks.
Claim 9
Independent Claim
98 words
A method of recording a digital information signal in which one word of a digital information signal is divided into a plurality of symbols and is recorded on a recording medium in a plurality of parallel, longitudinal tracks, comprising the steps of: performing an error correction coding process using said symbol as a unit; and specifying said symbols such that said plurality of symbols constituting one word of said digital information signal are recorded at positions having a strong error correlation in a widthwise direction of the record medium and in a longitudinal direction of the record medium.
Claim 10
Independent Claim
98 words
A method of recording a digital information signal in which one word of a digital information signal is divided into a plurality of symbols and is recorded on a recording medium in a plurality of parallel, longitudinal tracks, comprising the steps of: performing an error correction coding process using said symbol as a unit; and specifying said symbols such that said plurality of symbols constituting one word of said digital information signal are recorded at positions having a strong error correlation in a widthwise direction of the record medium and in a longitudinal direction of the record medium.
Claim 11
Independent Claim
99 words
An apparatus for recording a digital information signal in which one word of a digital information signal is divided into a plurality of symbols and is recorded on a recording medium in a plurality of parallel, longitudinal tracks, comprising: means for performing an error correction coding process using said symbols as a unit; and means for specifying said symbols such that said plurality of symbols constituting one word of said digital information signal are recorded at positions having a strong error correlation in a widthwise direction on said record medium and in a longitudinal direction on said record medium.
Claim 12
Independent Claim
99 words
An apparatus for recording a digital information signal in which one word of a digital information signal is divided into a plurality of symbols and is recorded on a recording medium in a plurality of parallel, longitudinal tracks, comprising: means for performing an error correction coding process using said symbols as a unit; and means for specifying said symbols such that said plurality of symbols constituting one word of said digital information signal are recorded at positions having a strong error correlation in a widthwise direction on said record medium and in a longitudinal direction on said record medium.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-28 | 1991-03-30 | 1991-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-28 | 1995-03-30 | 1995-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-28 | 1999-03-30 | 1999-09-29 | $7700.00 | Window Closed / Lapsed |