US 7,321,320 B2
DSV control apparatus and DSV control method
Hiroyuki Shine, Kanagawa (Japan)
Assigned to NEC Electronics Corporation, Kanagawa (Japan)
Filed on Aug. 02, 2006, as Appl. No. 11/497,260.
Claims priority of application No. 2005-228235 (JP), filed on Aug. 05, 2005.
Prior Publication US 2007/0030193 A1, Feb. 08, 2007
Int. Cl. H03M 7/00 (2006.01)
U.S. Cl. 341—58  [341/59] 14 Claims
OG exemplary drawing
 
1. A digital sum value (DSV) control apparatus that inserts a DC control bit for each DC control block, comprising:
a first DSV accumulated value comparator for setting a target flag to a DC control bit for a first DC control block;
a second DSV accumulated value comparator for comparing a first DSV accumulated value accumulated and calculated from DSV values of the first DC control block with a second DSV accumulated value accumulated and calculated from DSV values of a plurality of DC control blocks subsequent to the first DC control block; and
a DC control bit determination output section for determining a value of a DC control bit for the first control block according to an output of the first and the second DSV accumulated value comparators.