Appeal No. 1996-3996
Application 08/250,578
Independent claim 1 is reproduced as follows:
1. A magnetic recording/reproduction apparatus of an azimuth system for recording
and/or reproducing a digital signal by helical-scanning a magnetic tape, including a standard play
mode, and a long play mode of a recording and reproducing time period N (N is an even
number) times that of said standard play mode, as recording and reproducing modes, said
magnetic recording/reproduction apparatus comprising:
mode specifying input means for receiving a signal specifying one of said standard play
mode and said long play mode to be executed,
a rotary head cylinder driven to rotate at the same rotation speed in either of said
standard play mode and said long play mode,
a pair of magnetic head units having opposite azimuth, disposed in close proximity on a
circumferential face of said rotary head cylinder with a difference in level therebetween
corresponding to a predetermined track pitch (t) so that two continuous tracks are scanned
simultaneously at said predetermined track pitch on said magnetic tape for every one rotation of
said rotary head cylinder,
tape speed control means for reducing the travel speed of a said magnetic tape running
while being wound around said rotary head cylinder to 1/N the travel speed of said standard
play mode when said long play mode is specified,
signal processing means for compressing the amount of data of a digital signal to be
recorded to 1/N the amount of data of the standard play mode to provide the compressed data
to said pair of magnetic head units as record data of two channels, and/or for expanding the
amount of data of digital signals of two channels reproduced by said pair of magnetic head units
by N times, when said long play mode is specified, and
head control means for driving said pair of magnetic head units to carry out recording or
reproduction by said pair of magnetic head units in a unit of said two continuous tracks on said
magnetic tape, for every one rotation of said rotary head cylinder when said standard play
mode is specified, and for every N rotations of said rotary head cylinder when said long play
mode is specified, wherein said predetermined track pitch is maintained in both standard and
long play modes.
3
Page: Previous 1 2 3 4 5 6 7 8 9 Next
Last modified: November 3, 2007