CA936953A - Low redundancy recording and/or playback systems - Google Patents

Low redundancy recording and/or playback systems

Info

Publication number: CA936953A
Authority: CA; Canada
Prior art keywords: playback systems; low redundancy; recording; redundancy recording; low
Prior art date: 1970-08-17
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Expired

Application number

CA116333A

Other languages

English (en)

Other versions

CA116333S (en

Inventor

E. Milligan Gene

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

National Cash Register Co

Original Assignee

National Cash Register Co

Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)

1970-08-17

Filing date

1971-06-22

Publication date

1973-11-13

1971-06-22 Application filed by National Cash Register Co filed Critical National Cash Register Co

1973-11-13 Application granted granted Critical

1973-11-13 Publication of CA936953A publication Critical patent/CA936953A/en

Status Expired legal-status Critical Current

Links

Classifications

- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/14—Digital recording or reproducing using self-clocking codes
- G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
- G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
- G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof

Landscapes

Engineering & Computer Science (AREA)
Signal Processing (AREA)
Signal Processing For Digital Recording And Reproducing (AREA)

CA116333A 1970-08-17 1971-06-22 Low redundancy recording and/or playback systems Expired CA936953A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US6435570A	1970-08-17	1970-08-17

Publications (1)

Publication Number	Publication Date
CA936953A true CA936953A (en)	1973-11-13

Family

ID=22055369

Family Applications (2)

Application Number	Title	Priority Date	Filing Date
CA116333A Expired CA936953A (en)	1970-08-17	1971-06-22	Low redundancy recording and/or playback systems
CA290,599A Expired CA1051116B (en)	1970-08-17	1977-11-10	Low redundancy recording and/or playback systems

Family Applications After (1)

Application Number	Title	Priority Date	Filing Date
CA290,599A Expired CA1051116B (en)	1970-08-17	1977-11-10	Low redundancy recording and/or playback systems

Country Status (9)

Country	Link
US (1)	US3641525A (de)
JP (1)	JPS5315363B1 (de)
BE (1)	BE771278A (de)
CA (2)	CA936953A (de)
CH (1)	CH528798A (de)
DE (1)	DE2140646A1 (de)
FR (1)	FR2103834A5 (de)
GB (1)	GB1317504A (de)
ZA (1)	ZA714765B (de)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4032979A (en) *	1972-12-26	1977-06-28	Digital Development Corporation	Method and system for encoding and decoding digital data
US3930265A (en) *	1974-06-07	1975-12-30	Vrc California	High density magnetic storage system
US3996613A (en) *	1975-10-21	1976-12-07	Sperry Rand Corporation	Data recording and transmission apparatus utilizing non-consecutive zero coding
NL7605529A (nl) *	1976-05-24	1977-11-28	Philips Nv	Inrichting voor het overdragen van digitale informatie.
US4146909A (en) *	1977-11-21	1979-03-27	International Business Machines Corporation	Sync pattern encoding system for run-length limited codes
US4544962A (en) *	1981-07-06	1985-10-01	Matsushita Electric Industrial Co., Ltd.	Method and apparatus for processing binary data
DE3407832C2 (de) *	1983-03-03	1994-08-11	Matsushita Electric Ind Co Ltd	Verfahren zum Kodieren und Dekodieren binärer Daten
US5453742A (en) *	1993-10-18	1995-09-26	Cox; David F.	High density data compression encode/decode circuit apparatus and method of using in local area networks
US20040191573A1 (en) *	2003-03-31	2004-09-30	Fuller Richard M.	Magnetic recording media exhibiting decreased tape dropout performance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3226685A (en) *	1961-06-02	1965-12-28	Potter Instrument Co Inc	Digital recording systems utilizing ternary, n bit binary and other self-clocking forms
US3274611A (en) *	1963-12-27	1966-09-20	Ibm	Binary to ternary code conversion recording system
US3357003A (en) *	1964-12-28	1967-12-05	Ibm	Single channel quaternary magnetic recording system
US3500385A (en) *	1967-07-17	1970-03-10	Ibm	Coded data storage and retrieval system

1970
- 1970-08-17 US US64355A patent/US3641525A/en not_active Expired - Lifetime
1971
- 1971-06-22 CA CA116333A patent/CA936953A/en not_active Expired
- 1971-07-19 ZA ZA714765A patent/ZA714765B/xx unknown
- 1971-07-20 GB GB3399971A patent/GB1317504A/en not_active Expired
- 1971-08-02 FR FR7128200A patent/FR2103834A5/fr not_active Expired
- 1971-08-13 BE BE771278A patent/BE771278A/xx not_active IP Right Cessation
- 1971-08-13 DE DE19712140646 patent/DE2140646A1/de not_active Ceased
- 1971-08-17 JP JP6253071A patent/JPS5315363B1/ja active Pending
- 1971-08-17 CH CH1208971A patent/CH528798A/de not_active IP Right Cessation
1977
- 1977-11-10 CA CA290,599A patent/CA1051116B/en not_active Expired

Also Published As

Publication number	Publication date
FR2103834A5 (de)	1972-04-14
AU3187971A (en)	1973-02-08
DE2140646A1 (de)	1972-02-24
GB1317504A (en)	1973-05-23
CH528798A (de)	1972-09-30
CA1051116B (en)	1979-03-20
JPS5315363B1 (de)	1978-05-24
BE771278A (fr)	1971-12-16
ZA714765B (en)	1972-04-26
US3641525A (en)	1972-02-08

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