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Title: US4743981: System for synchronizing audiotape and videotape machines
[ Derwent Title ]


Country: US United States of America

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9 pages

 
Inventor: Spencer, David W.; Valencia, CA
Kadorian, Gregory S.; Simi Valley, CA

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

Application Number: US1986000824637

IPC Code: Advanced: G11B 5/86; G11B 27/00; G11B 27/026; G11B 27/10; G11B 27/28;
IPC-7: G11B 5/86;

ECLA Code: G11B5/86; G11B27/00A; G11B27/026; G11B27/10; G11B27/28; S11B220/20; S11B220/25D6; S11B220/90;

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;

Field of Search: 360/14.1-14.3,15,13,72.2,73 369/069,70

Priority Number:
1986-01-31  US1986000824637

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.

Attorney, Agent or Firm: Fulwider, Patton, Rieber, Lee & Utecht ;

Primary / Asst. Examiners: Psitos, Aristotelis M.;

Maintenance Status: E2 Expired  Check current status

INPADOC Legal Status: Show legal status actions

Family: None

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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Forward References: Show 15 U.S. patent(s) that reference this one

       
U.S. References: Go to Result Set: All U.S. references   |  Forward references (15)   |   Backward references (13)   |   Citation Link

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PDF
Patent  Pub.Date  Inventor Assignee   Title
Get PDF - 5pp US3535467  1970-10 Thieme et al.   DATA TRANSFER CONTROL SYSTEM
Get PDF - 15pp US4210939  1980-07 Ninomiya et al.  Sony Corporation Method and system for synchronizing the movement of plural recording media
Get PDF - 9pp US4214278  1980-07 Hunt et al.  SCP Producer's Services Limited Editing system for videotape sound
Get PDF - 46pp US4360843  1982-11 Meneyes et al.  Sony Corporation Apparatus and method for determining time code addresses at low tape speed
Get PDF - 18pp US4363049  1982-12 Ohtsuki et al.  Sony Corporation Method and apparatus for editing digital signals
Get PDF - 7pp US4375655  1983-03 Korth et al.  Memory Control Technology Corporation Universal digital data copying system
Get PDF - 7pp US4394694  1983-07 Ninomiya et al.  Sony Corporation Tape synchronizing apparatus
Get PDF - 11pp US4404602  1983-09 Hoshimi et al.  Sony Corporation PCM Signal recording system
Get PDF - 11pp US4446490  1984-05 Hoshimi et al.  Sony Corporation PCM Signal processing circuit
Get PDF - 8pp US4471390  1984-09 Hamann  Dennison Manufacturing Company Flexible diskette data duplication
Get PDF - 7pp US4491879  1985-01 Fine   Method of post production sound recording for video taped programs
Get PDF - 26pp US4496997  1985-01 Ohtsuki  Sony Corporation Cue data recording apparatus
Get PDF - 22pp US4675757  1987-06 Block   Method and apparatus for synchronizing tape recording and playback machines
       
Foreign References:
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Publication Date IPC Code Assignee   Title
  JP56083846 1981-07       
  JP57086137 1982-05       


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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