Digital modulation apparatus and digital modulation method
US7317408B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2004 |
| Grant date | Jan 8, 2008 |
| Priority date | — |
| Expiry date | May 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1457
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital modulation apparatus capable of generating a modulated code so that binary slice is correctly performed when reproducing is provided. To achieve this, in a digital modulation apparatus (10A), a DSV change amount calculator (15) calculates change amounts (ΔDSVa, ΔDSVb) in DSVs of candidate modulated codes (CODEa, CODEb) generated by a modulated code generator (11). A modulated code determinator (13) compares the change amounts (ΔDSVa, ΔDSVb), and determines that the candidate modulated code having a smaller absolute value should be selected as a modulated code (CODE). A modulated code selector (14) selects one of the candidate modulated codes (CODEa, CODEb) which is determined by the modulated code determinator (13), and outputs the selected code as a modulated code (CODE) for source data (DATA).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.