MODULATION APPARATUS AND METHOD

Title:

MODULATION APPARATUS AND METHOD

Document Type and Number:

WIPO Patent Application WO/2003/060912

Kind Code:

A1

Abstract:

A modulation apparatus and a modulation method having a simple circuit structure for realizing a modulation apparatus and capable of being easily applied to another system. According to a conversion table, a pattern converter (32) converts data supplied to a DSV control bit decision/insert unit (31) and having a basic data length of 2 bits into a variable length code having a basic code length of 3 bits. Moreover, a minimum run continuation limit code detector (33) detects from the data string into which the DSV control bit is inserted a position where the channel bit string converted by the pattern converter (32) is continuation of the minimum run. According to the position information supplied to the minimum run continuation limit code detector (33), a continuous minimum run replacement unit (34) replaces a predetermined portion of the channel bit string supplied to the pattern converter (32) by a predetermined pattern, thereby limiting the continuation of the minimum run within a predetermined number of times. The present invention can be applied to a modulation apparatus.

Inventors:

NAKAGAWA TOSHIYUKI (JP)
OKAMURA HIROSHIGE (JP)
TOBITA MINORU (JP)

Application Number:

PCT/JP2003/000236

Publication Date:

July 24, 2003

Filing Date:

January 15, 2003

Export Citation:

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Assignee:

SONY CORP (JP)
NAKAGAWA TOSHIYUKI (JP)
OKAMURA HIROSHIGE (JP)
TOBITA MINORU (JP)

International Classes:

G11B20/14; H03M5/14; H03M7/14; H04L25/49; (IPC1-7): G11B20/14; H03M7/14; H04L25/49

Foreign References:

JP2000149457A	2000-05-30
JP2000011551A	2000-01-14
JP2003060511A	2003-02-28
JP2000149457A	2000-05-30
US6275175B1	2001-08-14
EP1083687A1	2001-03-14

Other References: