Abstract: A tracking apparatus for a video tape recorder having an auto-tracking servo system which enables plural video heads to be automatically on-track by means of the mechanical displacement of plural electro-mechanical conversion elements having the plural video heads respectively mounted thereon. When track-jumping occurs, the apparatus determines which of the plural heads is creating the track jumping and further determines the compensating direction needed to change the scanning track. The apparatus then controls the position of the head creating the track jumping so as to eliminate the track-jumping.

Abstract: A video tape recorder performs tracking by moving its video heads vertically with respect to the scanning direction of the video tracks through the use of an electric-mechanical transducer. The video tape recorder measures the cycles of the synchronizing signals included in the reproduced video signals, so that the electric-mechanical transducer shifts the video heads to enable regular measuring, thereby allowing the video heads to scan on the regular video tracks.

Abstract: A method of processing video signals for eliminating vertical picture fluctuations caused when a video tape recorder reproduces video signals at a tape speed different from that used for recording the video signals. The vertical picture fluctuations are eliminated by substituting distorted vertical synchronous signals for the original vertical synchronous signal, the distorted vertical synchronous signals generated by a processing apparatus having a correction circuit which corrects for the difference in frequency characteristics between the video signal path and the vertical synchronous signal path.

Abstract: A rotary head type magnetic tape recording/reproducing apparatus, by which a tracking condition of the reproducing heads and a recorded track can be automatically adjusted. This apparatus includes an oscillator for imparting small vibrations to the reproducing heads, a synchronous detector, an integration adder circuit including an adder and a delay circuit rotary heads mounted on a positionable element, and from the small vibrations. A tracking error signal which is derived by wobbling circuit is applied to the integration adder circuit, and the positionable element is controlled by the output signal of the integration adder means so as to construct a servo loop. Accordingly, proper tracking can be attained even for large tracking error.