Magnetic recording encoder system for a (1,7) channel having a 2/3 coding rate
US5923629A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Nov 6, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M5/145
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An improvement in a system for encoding a data field on a disk with write gate data. The system has an encoder and a data receiving controller for directing write gate data in the form of 0 and 1 bits to the encoder. The encoder, in response to the write gate data, produces a primary code in the form of 0 and 1 bits and directing the primary code to the disk. The primary code has certain predetermined criteria with the encoder producing a secondary coding rate as an exception when the write gate data does not result in the predetermined criteria. The improvement comprises a mechanism for ensuring that the last predetermined number of bits in the data field are free from the exception.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.