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1. WO1990013892 - IMPROVED METHOD OF AND MEANS FOR PROVIDING INFORMATION TO EDIT A VIDEO TAPE

Publication Number WO/1990/013892
Publication Date 15.11.1990
International Application No. PCT/US1990/002625
International Filing Date 10.05.1990
IPC
G11B 27/024 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
02Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
022Electronic editing of analogue information signals, e.g. audio or video signals
024on tapes
G11B 27/10 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
10Indexing; Addressing; Timing or synchronising; Measuring tape travel
G11B 27/32 2006.01
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
10Indexing; Addressing; Timing or synchronising; Measuring tape travel
19by using information detectable on the record carrier
28by using information signals recorded by the same method as the main recording
32on separate auxiliary tracks of the same or an auxiliary record carrier
CPC
G11B 2220/91
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
2220Record carriers by type
90Tape-like record carriers
91Helical scan format, wherein tracks are slightly tilted with respect to tape direction, e.g. VHS, DAT, DVC, AIT or exabyte
G11B 27/024
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
02Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
022Electronic editing of analogue information signals, e.g. audio or video signals
024on tapes
G11B 27/107
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
10Indexing; Addressing; Timing or synchronising; Measuring tape travel
102Programmed access in sequence to addressed parts of tracks of operating record carriers
107of operating tapes
G11B 27/324
GPHYSICS
11INFORMATION STORAGE
BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
27Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
10Indexing; Addressing; Timing or synchronising; Measuring tape travel
19by using information detectable on the record carrier
28by using information signals recorded by the same method as the main recording
32on separate auxiliary tracks of the same or an auxiliary record carrier
322used signal is digitally coded
324Duty cycle modulation of control pulses, e.g. VHS-CTL-coding systems, RAPID-time code, VASS- or VISS-cue signals
Applicants
  • GSE, INCORPORATED [US]/[US]
Inventors
  • ROGGENDORF, Peter
Agents
  • REYNOLDS, Donald, P.
Priority Data
349,69010.05.1989US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) IMPROVED METHOD OF AND MEANS FOR PROVIDING INFORMATION TO EDIT A VIDEO TAPE
(FR) PROCEDE ET MOYEN DE PRODUCTION D'INFORMATIONS POUR LE MONTAGE D'UNE BANDE VIDEO
Abstract
(EN)
An editing device for half-inch video tape applies pulse-width modulation to prerecorded synchronizing pulses in predetermined intervals. The inverval starts with an eleven-bit header (44) compatible with the VASS system. Pulse-width modulated time codes (48) identify the recording session and the elapsed time are then added. A check code (60) completes the modulation for fifty-hz systems, e.g. PAL and SECAM. For sixty-hz systems, e.g. NTSC, a ten-bit dummy code (62) is added to complete the interval. The code is entered without writing over the leading edge of the prerecorded synchronizing pulse, allowing the timing of those pulses to continue without interruption. An editor can locate any desired interval and can then locate an individual frame within that interval by counting synchronizing pulses.
(FR)
Le dispositif de montage pour bande vidéo demi-pouce décrit applique une modulation d'impulsions en largeur aux impulsions de synchronisation pré-enregistrées à des intervalles prédéterminés. L'intervalle commence avec un en-tête de 11 bits (44) compatible avec le système VASS. Des codes temporels (48) à modulation d'impulsions en largeur identifient la session d'enregistrement et le temps écoulé est ensuite ajouté. Un code de contrôle (60) complète la modulation pour les systèmes 50 Hz, tels que les systèmes PAL et SECAM. Pour les systèmes 60 Hz, tels que le système NTSC, un code fictif de 10 bits (62) est ajouté pour compléter l'intervalle. Le code est introduit en évitant toute superposition sur le bord d'attaque de l'impulsion de synchronisation pré-enregistré, ce qui permet de poursuivre la synchronisation de ces impulsions sans interruption. Un monteur peut localiser n'importe quel intervalle désiré et peut localiser ensuite une image précise dans cet intervalle, en comptant les impulsions de synchronisation.
Also published as
Latest bibliographic data on file with the International Bureau