GB2020516A - Apparatus for generating recording time code signals - Google Patents

Apparatus for generating recording time code signals

Info

Publication number
GB2020516A
GB2020516A GB7913748A GB7913748A GB2020516A GB 2020516 A GB2020516 A GB 2020516A GB 7913748 A GB7913748 A GB 7913748A GB 7913748 A GB7913748 A GB 7913748A GB 2020516 A GB2020516 A GB 2020516A
Authority
GB
United Kingdom
Prior art keywords
time code
signal
code signal
recording time
bit
Prior art date
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.)
Granted
Application number
GB7913748A
Other versions
GB2020516B (en
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.)
Sony Corp
Original Assignee
Sony Corp
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.)
Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Publication of GB2020516A publication Critical patent/GB2020516A/en
Application granted granted Critical
Publication of GB2020516B publication Critical patent/GB2020516B/en
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
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/024—Electronic editing of analogue information signals, e.g. audio or video signals on tapes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/028—Electronic editing of analogue information signals, e.g. audio or video signals with computer assistance
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/022—Electronic editing of analogue information signals, e.g. audio or video signals
    • G11B27/029—Insert-editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/32—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier
    • G11B27/322—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on separate auxiliary tracks of the same or an auxiliary record carrier used signal is digitally coded
    • G11B27/323—Time code signal, e.g. on a cue track as SMPTE- or EBU-time code
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/90—Tape-like record carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

An apparatus 3 for generating a recording time code signal, e.g. for use in a video tape editing operation, comprises a time code data signal generator 12 associated with a time code signal forming circuit 11 which produces a recording time code signal consisting of bi-phase coded signals. The recording time code signal is associated with an information signal and then recorded on a recording medium in word units. The polarity of a specific bit signal of a fixed binary bit or value in a word unit of the recording time code signal is detected, and a circuit 15 changes the fixed binary bit in accordance with the polarity of the specific bit signal. Thus, a word unit of the recording time code signal, having bit signals with a constant relative polarity after the above specific bit signal, is derived from the circuit 11, so that the phase at the end of the last character of the time code signal will be known whereby, in an editing operation, new time code characters associated with additional information can be generated to be compatible in phase with the existing time code signal. <IMAGE>
GB7913748A 1978-04-20 1979-04-20 Apparatus for generating recording time code signals Expired GB2020516B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53046934A JPS6019075B2 (en) 1978-04-20 1978-04-20 Recording time code signal generator

Publications (2)

Publication Number Publication Date
GB2020516A true GB2020516A (en) 1979-11-14
GB2020516B GB2020516B (en) 1982-06-30

Family

ID=12761138

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7913748A Expired GB2020516B (en) 1978-04-20 1979-04-20 Apparatus for generating recording time code signals

Country Status (8)

Country Link
JP (1) JPS6019075B2 (en)
AT (1) AT380609B (en)
AU (1) AU522543B2 (en)
CA (1) CA1135840A (en)
DE (1) DE2916074A1 (en)
FR (1) FR2423819B1 (en)
GB (1) GB2020516B (en)
NL (1) NL7903078A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057074A1 (en) * 1981-01-22 1982-08-04 Sony Corporation Time code signal generators
EP0430283A2 (en) * 1989-11-30 1991-06-05 Sony Magnescale, Inc. Method and system for magnetically recording information on recording medium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4340916A (en) * 1980-04-11 1982-07-20 Sony Corporation Apparatus and method for detecting discontinuities in time code addresses
GB2249656B (en) * 1990-11-12 1994-09-28 Daewoo Electronics Co Ltd A multi-deck video cassette recorder system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE757737A (en) * 1969-10-27 1971-04-01 Ampex NEW MODE OF INFORMATION RECORDING
US3681524A (en) * 1970-06-16 1972-08-01 Columbia Broadcasting Syst Inc Multiple frequency time code generator and reader
US3795903A (en) * 1972-09-29 1974-03-05 Ibm Modified phase encoding
JPS5949754B2 (en) * 1976-07-31 1984-12-04 ソニー株式会社 tape editing machine
JPS5466111A (en) * 1977-11-05 1979-05-28 Sony Corp Time code write system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057074A1 (en) * 1981-01-22 1982-08-04 Sony Corporation Time code signal generators
EP0430283A2 (en) * 1989-11-30 1991-06-05 Sony Magnescale, Inc. Method and system for magnetically recording information on recording medium
EP0430283A3 (en) * 1989-11-30 1992-06-03 Sony Magnescale Inc. Method and system for magnetically recording information on recording medium

Also Published As

Publication number Publication date
GB2020516B (en) 1982-06-30
CA1135840A (en) 1982-11-16
AU522543B2 (en) 1982-06-10
AT380609B (en) 1986-06-25
NL7903078A (en) 1979-10-23
JPS6019075B2 (en) 1985-05-14
JPS54139511A (en) 1979-10-30
AU4629479A (en) 1979-10-25
DE2916074A1 (en) 1979-10-31
FR2423819A1 (en) 1979-11-16
ATA300879A (en) 1985-10-15
DE2916074C2 (en) 1988-03-03
FR2423819B1 (en) 1986-07-18

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950420