Magnetic recording apparatus and magnetic recording method
AssigneeSony Corporation
InventorMorihiko Sato
Life of this patent
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Abstract
A magnetic recording apparatus has a rotating drum which rotates magnetic heads at a constant speed. The magnetic heads scan a magnetic tape. On a magnetic tape, an area written by each scan always includes a lateral portion of an area written by the previous scan. In this portion, old data is overwritten by new data, and writing continues. An area excluding the overwritten portion is a recording track. The running speed of the magnetic tape is changed by a system controller, and hence the recording track width can be changed.
Claims5
A magnetic recording apparatus for recording video data from an input image signal on a magnetic tape, comprising:
- a frame memory operably configured to store a frame of said input image signal;
- a signal processing circuit operably connected to said frame memory for processing said frame of said in one of a DV format and a DVCAM format;
- magnetic-tape running means for running the magnetic tape in a running direction;
- running-speed control means operably connected to said frame memory, said signal processing circuit, and said magnetic-tape running means for controlling the running speed of the magnetic tape;
- rotating and driving means which has a cylindrical shape and which rotates at a constant speed and at a predetermined angle with respect to the running direction of the magnetic tape;
- and
- data writing means which is provided on a cylindrical surface of said rotating and driving means and which is rotated, said data writing means scanning the magnetic tape at the predetermined angle and writing data to form a next recording track adjacent to a previous recording track such that the next recording track overlaps a predetermined portion of the previous recording track.
A magnetic recording method for recording video data from an input image signal on a magnetic tape having a running direction, the method comprising the steps of:
- scanning the magnetic tape by a magnetic head which rotates at a constant speed and at a predetermined angle with respect to the running direction of the magnetic tape and writing data to form a next recording track adjacent to a previous recording track such that the next recording track overlaps a predetermined portion of the previous recording track;
- and
- controlling the running speed of the magnetic tape in accordance with one of a DV format and a DVCAM format in order that a remaining portion other than the the predetermined portion of the previous recording track has a width equal to a predetermined value.
Dependencies are inferred from the claim text.