Computer for video tape editing system

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Details

360 14, G06F 100, H04N 5785

Patent

active

041006070

ABSTRACT:
A computer is provided for use with a video tape editing system. The video tape editing system is of the type which performs tape-to-tape editing by transferring selected video information from a first video tape recorder, designated the "playback" video tape recorder, to a second video tape recorder, designated the "record" video tape recorder; or directly from a video camera to a record video tape recorder. The computer of the invention, when used in conjunction with such a video tape editing system, provides precise end insert timing so that both in-and-out editing can be automatically performed. Precision accuracy in the system is maintained without the use of a time code, this being achieved by means of a unique closed loop circuit which counts control track pulses derived from the conventional video cassette tapes which are normally used in present-day video tape recorders. The computer of the invention enables in-and-out edit points to be previewed as many times as desired by the operator. After each preview, the operator can adjust all the parameters of the edit. The computer includes a digital stop watch feature which provides frame-accurate scene duration timing for either the playback or record video tape recorders in the video editing system. Moreover, scenes can be timed from still frame start to still frame stop, or on the fly, if so desired. The computer also provides for an automatic bi-directional tape search in either the playback or record video tape recorders in the video tape editing system.

REFERENCES:
patent: 4040098 (1977-08-01), Beeson et al.
Shimada et al., Automated Video Tape Editing System, Toshiba Review, Oct. 1971, pp. 5-10.
New On-Line Editing System, RCA Broadcast News, No. 160, Dec. 1976, pp. 42-48.
Fujimura et al., An Automatic Video-Tape Editing/Splicing System Using a Process Computer, Journal of the SMPTE, vol. 76, No. 3, Mar. 1967, pp. 169-176.

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