US 4,901,166 A · Tracking control for VTR editing employing previously recorded tracking information

Abstract

A method and apparatus for editing video information from one or more video tapes onto a master tape, in which different video tape recorders can be used to produce the master tape, involves the storage of tracking information that was used in recording a segment at a position immediately preceding the desired editing point on the master tape, and also stores tracking information that was used in recording another segment at a position on the master tape some time prior to the segment next preceding the edit point. A difference value between the two stored tracking information signals is detected and compared with a predetermined value, and the comparison result is used to select one of the two stored tracking information signals to control the tracking during recording at the desired editing point, so that small head position detector errors will not accumulate over a number of edit points on the master tape.

Claims8

Dependent claims

Editing apparatus for recording an information signal in transverse tracks at respective editing points on a record medium, comprising:

a transducing device;
means for generating tracking information signals from previously recorded signals on the record medium indicative of respective relative positions between at least first and second groups of tracks at respective locations on said record medium and said transducing device;
means for generating a difference signal between generated first and second tracking information signals obtained from a first location prior to an editing point on said record medium and a second location prior to the first location, respectively;
and
position controlling means for selecting one of said first and second tracking information signals based upon the generated difference signal and for controlling a relative position between the record medium and the transducing device in response thereto, said position controlling means including means for comparing the difference signal with a predetermined value contained within said means for comparing that represents a percentage of a track width, so that one of the first and second tracking information signals is selected in response to a result of the comparison.

2 more elements

Dependencies are inferred from the claim text.

Tracking control for VTR editing employing previously recorded tracking information

Life of this patent

Tracking control for VTR editing employing previously recorded tracking information

Life of this patent

Abstract

Claims8