US 6,188,336 B1 · 7/13 channel coding and decoding method using RLL(2,25) code

Abstract

A channel coding method for channel-coding digital data includes the steps of (a) inputting 7-bit data, and (b) coding the input 7-bit data into 13-bit channel data with reference to at least one run length limited RLL(2,25) code table, where the minimum run length is 2 and the maximum run length is 25. A channel decoding method for channel-decoding channel-coded digital data includes the steps of (a) inputting 13-bit channel data, and (b) decoding the input 13-bit channel data into the prior-to-being-coded 7-bit data with reference to at least one run length limited RLL(2,25) code table, where the minimum run length is 2 and the maximum run length is 25. The code tables comprised of the RLL(2,25) codes include a main code table and sub-code tables. The channel coding and decoding method enables a high-density in a recording medium and real-time processing of the system during transmission and recording/reproduction of digital data.

Claims16

Dependent claims

A channel coding method for channel-coding digital data, the channel coding method comprising the steps of:

(a) inputting 7-bit data;
and
(b) coding the input 7-bit data into 13-bit channel data with reference to at least one run length limited RLL(2,25) code table each having RLL(2,25) codes, wherein a minimum run length is 2 and a maximum run length is 25.

A channel decoding method for channel-decoding channel-coded digital data, the channel decoding method comprising the steps of:

(a) inputting 13-bit channel data;
and
(b) decoding the input 13-bit channel data into prior-to-being-coded 7-bit data with reference to at least one run length limited RLL(2,25) code table, wherein a minimum run length is 2 and a maximum run length is 25.

A channel coding method for channel-coding digital data, comprising the steps of:

(a) receiving a plurality of 7-bit input data;
(b) determining whether a minimum run length is violated in response to first and second ones of the 7-bit input data being coded to successive 26-bit channel data of 13-bit channel data and next 13-bit channel data using a first run length limited RLL(2,25) code table having RLL(2,25) codes;
and
(c) coding the first 7-bit input data into the 13-bit channel data using the first run length limited RLL(2,25) code table if the minimum run length is not violated;
(d) coding the first 7-bit input data into the 13-bit channel data using a second run length limited RLL(2,25) code table having RLL (2,25) codes and the second 7-bit input data into the next 13-bit channel data using a third run length limited RLL(2,25) code table having RLL(2,25) codes, if the minimum run length is violated;
(e) receiving the 13-bit channel data and the next 13-bit channel data as first and second 13-bit channel data;
(f) determining whether 26-bit channel data of the first and second 13-bit channel data has been channel-coded using the second and third run length limited RLL(2,25) code tables having RLL(2,25) codes for the first and second 13-bit channel data, respectively;
(g) decoding the first 13-bit input data into the prior-to-being coded 7-bit data using the first run length limited RLL(2,25) code table if the 26-bit channel data has not been channel-coded using the second and third run length limited RLL(2,25) code tables;
and
(h) decoding the first 13-bit input data into the prior-to-being coded 7-bit data using the second run length limited RLL(2,25) code table and the second 13-bit channel data into the prior-to-being coded next 7-bit data using the third run length limited RLL(2,25) code table, if the 26-bit channel data has been channel-coded using the second and third run length limited RLL(2,25) code tables.

7 more elements

Dependencies are inferred from the claim text.

7/13 channel coding and decoding method using RLL(2,25) code

Life of this patent

7/13 channel coding and decoding method using RLL(2,25) code

Life of this patent

Abstract

Claims16