Method and apparatus for recording helical scan information and tracking signals
AssigneeU.S. Philips Corporation
InventorsHendrik J. Bergmans, Hendrik J. Sanderson
Life of this patent
Estimating the term…
Abstract
A method of recording information on a tape-like record carrier by means of a device provided with a rotary head disc on which a write head with controllable height is mounted for actively following the tracks. During recording tracking signals are written with the aid of a separate fixed head, which preferably also constitutes the erase head, and the write head follows the tracking signal recorded by the fixed head during the recording of information.
Claims9
An apparatus for recording helical scan information and tracking signals on a tape-like record carrier, comprising
- a head disc mounted for rotation in a plane of rotation,
- at least a first write head mounted on said head disc, arranged for sensing a tracking signal on the record carrier transported past the disc, means for detecting the tracking signal on said record carrier sensed by said first write head, and
- means for controlling the height of the first write head which is movably mounted relative to the disc, responsive to said means for detecting,
- characterized in that the apparatus further comprises a fixed write head fixed to the rotary head disc, and
- means for applying further tracking signal to said fixed head while the first write head is detecting said first mentioned tracking signal recorded by the fixed head.
A method of recording helical scan information and tracking signals on a tape-like record carrier in form of tracks which are substantially parallel to each other and which make an angle with the longitudinal axis of the record carrier, comprising
- (a) transporting tape along a helical path about a rotary head disc,
- (b) detecting a tracking signal on the tape, and
- (c) controlling the height of a first write head which is movable relative to the disc, in response to said detecting,
- characterized by the additional step of recording said tracking signals by a fixed write head fixed to the rotary head disc, and
- wherein said detecting step comprises reading by the first write head said tracking signals just recorded by the fixed head while the recording process is continuing.
Dependencies are inferred from the claim text.