Method and apparatus for generating run-length limited code
US5812073A · kind A · utility
3Cited by
9References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1995 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Jul 31, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M5/145
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus are provided for generating an (4,20) RLL modulation code having a decreased detectible window width and an increased recording density ratio. The code's spectrum is concentrated in the low-frequency band, thereby improving the signal-to-noise ratio. In addition, the hardware of an encoder and a decoder can be easily implemented since the modulation code has a fixed codeword length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.