Tracking error data detecting apparatus and VTR having the same

Details Tracking error data detecting apparatus and VTR having the same Tracking error data detecting apparatus and VTR having the same

1996-07-03

1998-06-23

Hindi, Nabil

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 103, 386 78, G11B 5584

Patent

active

057711321

ABSTRACT:
A video tape recorder has a drum for winding a magnetic tape therearound, a capstan motor and a drum motor linked with the drum, both motors for traveling the magnetic tape, and two rotary magnetic heads arranged adjacent to each other relative to the magnetic tape and having two different azimuth angles. One reproduced signal of higher signal level is selected from two modulated signals reproduced by the two magnetic heads to output a detected reproduced signal. Sampling signals are generated each having a signal level corresponding to a signal level of the detected reproduced signal on the basis of the reproduced signal obtained by the selected magnetic head, only during a period while a predetermined one of the two magnetic heads is being selected in response to a head select signal, at each of time intervals obtained by dividing one vertical scanning period into a two or more natural number N. A central axis of the drum is inclined in such a way that the respective signal levels of the sampling signals satisfy a predetermined relative relationship with respect to one another, when recorded signal is reproduced by traveling the magnetic tape at a travel speed different from another travel speed of the magnetic tape in recording operation. And, rotation phase of the capstan motor is changed relative to a reference drum rotation signal of the drum motor.

REFERENCES:
patent: 4816927 (1989-03-01), Rijckaert et al.
patent: 5353173 (1994-10-01), Yoo
patent: 5504642 (1996-04-01), Kinjo et al.

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