System for recording and/or reproducing digital data
First Claim
1. Apparatus for recording and/or reproducing digital data relative to a rotary magnetic disk, in which said digital data is formed as blocks of interleaved data, comprising:
- magnetic head means cooperating with said magnetic disk for a transfer of data therebetween;
circuit means for controlling reading and/or writing of digital data between said magnetic disk and said magnetic head means;
buffer storage means connected to said circuit means for storing at least one block of said digital data and;
means for re-arranging said digital data to be written in and read out from said magnetic disk including means for storing said data in said buffer storage means at consecutive addresses in a first predetermined area of said buffer storage means and address converter means for reading said data stored in said buffer storage means in an order corresponding to a record pattern on said magnetic disk, prior to writing said digital data on said rotary magnetic disk by said magnetic head means.
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Accused Products
Abstract
A system for recording and/or reproducing digital data on a magnetic floppy disk, in which the address data of the digital data is nonsuccessive relative to an original time sequence thereof by the addition of error correction bits to the digital data, involves re-arrangement of the digital data by providing a buffer memory between the floppy disk apparatus and a peripheral device, the buffer memory having a capacity capable of completing the re-arrangement of the digital data, and includes allocating the digital data to the buffer memory such that pure data and the error correction bits are respectively stored in different memory areas of the buffer memory. Address data is converted upon writing or reading the digital data from the buffer memory so as to allocate the address data such that it appears to be nonsuccessive, as seen from a recorded pattern of the disk, but it appears to be successive, as seen from the peripheral device.
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Citations
10 Claims
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1. Apparatus for recording and/or reproducing digital data relative to a rotary magnetic disk, in which said digital data is formed as blocks of interleaved data, comprising:
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magnetic head means cooperating with said magnetic disk for a transfer of data therebetween; circuit means for controlling reading and/or writing of digital data between said magnetic disk and said magnetic head means; buffer storage means connected to said circuit means for storing at least one block of said digital data and; means for re-arranging said digital data to be written in and read out from said magnetic disk including means for storing said data in said buffer storage means at consecutive addresses in a first predetermined area of said buffer storage means and address converter means for reading said data stored in said buffer storage means in an order corresponding to a record pattern on said magnetic disk, prior to writing said digital data on said rotary magnetic disk by said magnetic head means. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for recording and/or reproducing digital data, comprising:
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a rotary magnetic disk having digital data recorded thereon in a predetermined record pattern along a record track, said digital data including at least true data and error check data arranged alternately at a predetermined repetition rate along said track; a magnetic transducer cooperating with said disk for reading in and writing out digital data; circuit means for controlling the reading and/or writing of digital data on said rotary magnetic disk by said magnetic transducer; and buffer storage means connected to said circuit means for re-arranging said digital data written in said magnetic disk or read out from said magnetic disk, including means for storing said data in said buffer storage means at consecutive addresses in a first predetermined area of said buffer storage means and address converter means for reading said data stored in said buffer storage means in an order corresponding to a record pattern on said magnetic disk, prior to writing said digital data on said rotary magnetic disk by said magnetic head means, such that said true digital data and said error check data are separately stored at different areas in said buffer storage means. - View Dependent Claims (7, 8)
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9. A method of recording and/or reproducing digital data on a rotary magnetic disk using a magnetic head cooperating therewith, comprising the steps of:
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storing interleaved digital data in an original time sequence in a random access memory; forming a first error code relative to said digital data; storing the first error code in a second predetermined location in said random access memory; reading out the data and the first error code from said random access memory in the order of a record pattern on the magnetic disk and feeding same to an error encoder for generating and adding thereto a second error code and feeding the digital data and first and second error codes to a signal processor;
converting the data and first and second error codes into an increased bit code;forming the increased bit code data into a serial signal; and feeding the serial signal to the magnetic head and recording the serial signal on the disk. - View Dependent Claims (10)
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Specification