State modulation method and apparatus for inserting state control codes
US7102546B2 · kind B2 · utility
1Cited by
3References
20Claims
0Family size
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Key dates
| Filing date | Oct 6, 2005 |
| Grant date | Sep 5, 2006 |
| Priority date | — |
| Expiry date | Oct 6, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2020/1457
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A state modulation method and an apparatus for inserting state control codes are provided. To overcome the problems of inefficient control on direct current and low frequency component in conventional state modulation techniques, the disclosed method inserts state control codes in a state modulation method to increase the probability for selection. With multi-level characteristics, the inserted state control codes can provide a plurality of sets of different signals for selection during coding. Thereby, the direct current and low frequency components can be well controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.