Sony Corporation

Soujiro Kizu

Ichiro Ninomiya

Hidehiko Sashoh

Hidehiko Sashou

An electronic editing system utilizes time code signals for deriving the color frame phases of video signals reproduced by a video tape player and by a video tape recorder. A relationship between color subcarrier phases and frame data of the time code signal is derived during a test mode operation and then, in the editing operation, the color subcarrier phases of the video signals of the video tape player and the video tape recorder are derived using this relationship on the basis of the time code signals at editing points. The phase of each color subcarrier is identified by locking color framing pulses of the video signal to a reference synchronizing signal, from which a reference color frame phase can be derived, the difference in phase between the time code signal and the color framing pulse is detected, and the difference in phase between the color framing pulse and the color frame phase of the video signal on the video tape is detected. The so derived color subcarrier phases of the playback and recording tapes are compared at the editing point on each tape and the editing point on one of the two tapes is then shifted until the color subcarrier phases of the playback and recording tapes at the respective editing points match each other.

Video tape recorder edit control system for performing color frame

Editing data producing apparatus produces first data for editing a cinema film based on second editing data obtained by editing a television video signal reproduced from a record medium on which a cinema signal is recorded in a manner of the television video signal. The video signal is obtained from the cinema signal by an m:n ratio (m and n are both integers) pull-down conversion. An editing video frame address representative of an editing location of the video signal and a reference video frame address representative of the video frame address corresponding to a predetermined cinema frame address of the cinema signal are supplied to a circuit which then produces a relative address between the editing video frame address and the reference video frame address. A circuit is provided for dividing a number representative of the relative address by a number bearing a predetermined relation to m and n, so that a remainder is detected. In response to the remainder and field data representative of a field status of the editing video frame address, the video frame address is converted to the cinema frame address.

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Kanagawa, Japan

Soujiro Kizu