Apparatus for encoding and decoding run length limited code data

Details Apparatus for encoding and decoding run length limited code data Apparatus for encoding and decoding run length limited code data

1996-07-15

1997-12-30

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital code to digital code converters

To or from run length limited codes

341100, 341101, 341 58, H03M 700

Patent

active

057035806

ABSTRACT:
The present invention relates to an apparatus for modulating input data by encoding the data to a run length limited (RLL) code data satisfying the (d,k,m,n) condition and decoding the modulated data, in which d is a minimum run length, k is a maximum run length, m is the bit number of input code data, n is the bit number of transmission code data, and the encoding and decoding apparatus according to the present invention comprises a look-up table (LUT) for encoding input parallel m-bit code data to r-bit code data in which r is not less than m and less than n, a post-encoder for encoding the encoded r-bit data to an n-bit transmission code data, a pre-decoder for decoding the input n-bit transmission code data to the r-bit code data according to the minimum run length condition, and a LUT for decoding the decoded r-bit code data to the original m-bit code data, by which the transmission code length is shortened according to the minimum run length condition so that the memory size required for encoding and decoding RLL code data can be reduced.

REFERENCES:
patent: 4724422 (1988-02-01), Golab
patent: 4818900 (1989-04-01), Klass et al.
patent: 4864303 (1989-09-01), Ofek
patent: 4887084 (1989-12-01), Yamaguchi
patent: 4971407 (1990-11-01), Hoffman
patent: 5046182 (1991-09-01), Hamstra et al.
patent: 5144304 (1992-09-01), McMahon et al.
patent: 5270714 (1993-12-01), Tanaka et al.
patent: 5349350 (1994-09-01), Blagaila
patent: 5471208 (1995-11-01), Sauer
patent: 5517533 (1996-05-01), Szmauz et al.
patent: 5528237 (1996-06-01), Moloney et al.

Affiliated with

Also associated with

Rating

Apparatus for encoding and decoding run length limited code data does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus for encoding and decoding run length limited code data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for encoding and decoding run length limited code data will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-206723