A digital write-and-read method and a signal processing apparatus wherein a write encoder includes a bit distribution circuit for dividing an input data block into n (n: 2 or more) series of bit strings and outputting them in parallel, a first coding circuit for executing predetermined coding for each of data series so distributed and a second coding circuit for converting the output bit series D1 to D3 of the first coding circuit to an n-bit channel code by looking up the previous channel code information, and wherein the second coding circuit executes ...
[ What is claimed is:] [1.] A digital recording method comprising:a first coding step of distributing serially digital data to be recorded in such a manner as to constitute n (where n is 2 or more) data series each having an inherent bit length, arranging each of said data series to the same bit length by adding an coding bit or bits to at least one of said data series having a short bit length, and serially generating n-bit parallel data by outputting one bit each from said n data series; anda second coding step of converting n-bit input data obtained f...
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