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 Title: |
US4743981:
System for synchronizing audiotape and videotape machines
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Spencer, David W.; Valencia, CA
Kadorian, Gregory S.; Simi Valley, CA
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| Assignee: |
Walt Disney Productions, Burbank, CA
other patents from WALT DISNEY PRODUCTIONS (617670) (approx. 22)
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| Published / Filed: |
1988-05-10
/ 1986-01-31
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| Application Number: |
US1986000824637
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| IPC Code: |
Advanced:
G11B 5/86;
G11B 27/00;
G11B 27/026;
G11B 27/10;
G11B 27/28;
IPC-7:
G11B 5/86;
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| ECLA Code: |
G11B5/86; G11B27/00A; G11B27/026; G11B27/10; G11B27/28; S11B220/20; S11B220/25D6; S11B220/90;
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| U.S. Class: |
Current:
386/201;
360/013;
360/073.13;
386/253;
386/266;
386/318;
386/337;
G9B/005.308;
G9B/027.001;
G9B/027.007;
G9B/027.017;
G9B/027.029;
Original:
360/015;
360/013;
360/073;
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| Field of Search: |
360/14.1-14.3,15,13,72.2,73
369/069,70
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| Priority Number: |
| 1986-01-31 |
US1986000824637 |
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| Abstract: |
A method and apparatus for regulating the speed of a multitrack audiotape machine while recording audio from a multitrack audiotape onto a videotape. The speed of the audiotape machine is regulated by correlating a video synchronization signal previously recorded onto the audiotape with a video synchronization signal controlling the videotape recorder during the recording. Highly accurate synchronization between the two machines is achieved. This allows for the transfer of multiple audio tracks from the multitrack audiotape onto the videotape and then onto multiple laser videodiscs, such that during playback of the multiple laser videodiscs, the laser videodisc players can be synchronized with each other.
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| Attorney, Agent or Firm: |
Fulwider, Patton, Rieber, Lee & Utecht ;
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| Primary / Asst. Examiners: |
Psitos, Aristotelis M.;
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| Maintenance Status: |
E2 Expired Check current status
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 7 claims |
What is claimed is:
1. A method for synchronizing an audio tape machine with a video tape machine while recording audio from an audio tape onto a video tape comprising the steps of:
- recording a first composite video synchronization signal on said audio tape, said first composite video synchronization signal containing both vertical and horizontal synchronization signals;
- recording a first SMPTE type time code on said audio tape;
- recording a second SMPTE type time code on said video tape;
- generating a second composite video synchronization signal, said second composite video synchronization signal containing both vertical and horizontal synchronization signals;
- generating a clock signal;
- coarsely adjusting the speed of said audio tape machine with respect to the speed of said video tape machine responsive to the synchronization of the signals of said first SMPTE type time code and said second SMPTE type time code;
- accurately synchronizing the speed of said audio tape machine with said video tape machine subsequent to said coarse adjustment of the speed of said audio tape machine by adjusting the frequency of said clock signal to synchronize first, the phase of said vertical synchronization signal of said first composite video synchronization signal with the phase of said vertical synchronization signal of said second composite video synchronization signal, and second, the phase of said horizontal synchronization signals of said first and second composite video synchronization signals; and,
- recording audio signals from said audio tape onto said video tape.
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| Background / Summary: |
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| Drawing Descriptions: |
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| Description: |
Show description
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| Forward References: |
Show 15 U.S. patent(s) that reference this one
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| Foreign References: |
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Publication |
Date |
IPC Code |
Assignee |
Title |
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JP56083846
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1981-07 |
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JP57086137
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1982-05 |
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| Other References: |
Swetland; "A New System for Synchronizing Magnetic Tape and Magnetic Film Transports for Television Post Production", SMPTE, vol. 88, Jul. 79, No. 71, pp. 483-485.
(3 pages)
Cited by 5 patents
"Lip-Sync Editing and Mixing of Nonperforated Magnetic Tape Using the New Synchrolock Tape System", Bunting, SMPTE Journal, vol. 86, Jul. 77, pp. 482-486.
(5 pages)
Cited by 2 patents
"Sypher: Videotape Sound Post Dubbing"; Eden-Eadon, SMPTE Journal, vol. 87, Aug. 78, pp. 504-507.
(4 pages)
Cited by 3 patents
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